From 245797f6b998fb4f52df61e38151c80b05615740 Mon Sep 17 00:00:00 2001
From: t-miyajima <55669223+dvorak55@users.noreply.github.com>
Date: Sat, 8 Aug 2020 03:27:20 +0900
Subject: [keyboard] Add chavdai40 keyboard (#9820)

* On branch add_chavdai40_keyboard

Changes to be committed:
	new file:   keyboards/chavdai40/boards/GENERIC_STM32_F042X6/board.c
	new file:   keyboards/chavdai40/boards/GENERIC_STM32_F042X6/board.h
	new file:   keyboards/chavdai40/boards/GENERIC_STM32_F042X6/board.mk
	new file:   keyboards/chavdai40/bootloader_defs.h
	new file:   keyboards/chavdai40/chavdai40.c
	new file:   keyboards/chavdai40/chavdai40.h
	new file:   keyboards/chavdai40/chconf.h
	new file:   keyboards/chavdai40/config.h
	new file:   keyboards/chavdai40/halconf.h
	new file:   keyboards/chavdai40/info.json
	new file:   keyboards/chavdai40/keymaps/42keys-dvorak/config.h
	new file:   keyboards/chavdai40/keymaps/42keys-dvorak/keymap.c
	new file:   keyboards/chavdai40/keymaps/42keys-eucalyn/config.h
	new file:   keyboards/chavdai40/keymaps/42keys-eucalyn/keymap.c
	new file:   keyboards/chavdai40/keymaps/42keys-qwerty/config.h
	new file:   keyboards/chavdai40/keymaps/42keys-qwerty/keymap.c
	new file:   keyboards/chavdai40/keymaps/44keys-dvorak/config.h
	new file:   keyboards/chavdai40/keymaps/44keys-dvorak/keymap.c
	new file:   keyboards/chavdai40/keymaps/44keys-eucalyn/config.h
	new file:   keyboards/chavdai40/keymaps/44keys-eucalyn/keymap.c
	new file:   keyboards/chavdai40/keymaps/44keys-qwerty/config.h
	new file:   keyboards/chavdai40/keymaps/44keys-qwerty/keymap.c
	new file:   keyboards/chavdai40/keymaps/default/config.h
	new file:   keyboards/chavdai40/keymaps/default/keymap.c
	new file:   keyboards/chavdai40/mcuconf.h
	new file:   keyboards/chavdai40/readme.md
	new file:   keyboards/chavdai40/rules.mk

* commit suggestions of zvecr and fauxpark, thanks

* commit suggestions of fauxpark, thanks

* commit suggestions of fauxpark, thanks

* commit suggestions of drashna, thanks
---
 .../chavdai40/boards/GENERIC_STM32_F042X6/board.c  | 266 +++++++
 .../chavdai40/boards/GENERIC_STM32_F042X6/board.h  | 805 +++++++++++++++++++++
 .../chavdai40/boards/GENERIC_STM32_F042X6/board.mk |   9 +
 keyboards/chavdai40/bootloader_defs.h              |   7 +
 keyboards/chavdai40/chavdai40.c                    |  16 +
 keyboards/chavdai40/chavdai40.h                    |  49 ++
 keyboards/chavdai40/chconf.h                       | 714 ++++++++++++++++++
 keyboards/chavdai40/config.h                       |  74 ++
 keyboards/chavdai40/halconf.h                      | 525 ++++++++++++++
 keyboards/chavdai40/info.json                      | 101 +++
 keyboards/chavdai40/keymaps/42keys-dvorak/config.h |  22 +
 keyboards/chavdai40/keymaps/42keys-dvorak/keymap.c |  41 ++
 .../chavdai40/keymaps/42keys-eucalyn/config.h      |  22 +
 .../chavdai40/keymaps/42keys-eucalyn/keymap.c      |  40 +
 keyboards/chavdai40/keymaps/42keys-qwerty/config.h |  22 +
 keyboards/chavdai40/keymaps/42keys-qwerty/keymap.c |  40 +
 keyboards/chavdai40/keymaps/44keys-dvorak/config.h |  22 +
 keyboards/chavdai40/keymaps/44keys-dvorak/keymap.c |  40 +
 .../chavdai40/keymaps/44keys-eucalyn/config.h      |  22 +
 .../chavdai40/keymaps/44keys-eucalyn/keymap.c      |  40 +
 keyboards/chavdai40/keymaps/44keys-qwerty/config.h |  22 +
 keyboards/chavdai40/keymaps/44keys-qwerty/keymap.c |  40 +
 keyboards/chavdai40/keymaps/default/config.h       |  22 +
 keyboards/chavdai40/keymaps/default/keymap.c       |  40 +
 keyboards/chavdai40/mcuconf.h                      | 190 +++++
 keyboards/chavdai40/readme.md                      |  19 +
 keyboards/chavdai40/rules.mk                       |  18 +
 27 files changed, 3228 insertions(+)
 create mode 100644 keyboards/chavdai40/boards/GENERIC_STM32_F042X6/board.c
 create mode 100644 keyboards/chavdai40/boards/GENERIC_STM32_F042X6/board.h
 create mode 100644 keyboards/chavdai40/boards/GENERIC_STM32_F042X6/board.mk
 create mode 100644 keyboards/chavdai40/bootloader_defs.h
 create mode 100644 keyboards/chavdai40/chavdai40.c
 create mode 100644 keyboards/chavdai40/chavdai40.h
 create mode 100644 keyboards/chavdai40/chconf.h
 create mode 100644 keyboards/chavdai40/config.h
 create mode 100644 keyboards/chavdai40/halconf.h
 create mode 100644 keyboards/chavdai40/info.json
 create mode 100644 keyboards/chavdai40/keymaps/42keys-dvorak/config.h
 create mode 100644 keyboards/chavdai40/keymaps/42keys-dvorak/keymap.c
 create mode 100644 keyboards/chavdai40/keymaps/42keys-eucalyn/config.h
 create mode 100644 keyboards/chavdai40/keymaps/42keys-eucalyn/keymap.c
 create mode 100644 keyboards/chavdai40/keymaps/42keys-qwerty/config.h
 create mode 100644 keyboards/chavdai40/keymaps/42keys-qwerty/keymap.c
 create mode 100644 keyboards/chavdai40/keymaps/44keys-dvorak/config.h
 create mode 100644 keyboards/chavdai40/keymaps/44keys-dvorak/keymap.c
 create mode 100644 keyboards/chavdai40/keymaps/44keys-eucalyn/config.h
 create mode 100644 keyboards/chavdai40/keymaps/44keys-eucalyn/keymap.c
 create mode 100644 keyboards/chavdai40/keymaps/44keys-qwerty/config.h
 create mode 100644 keyboards/chavdai40/keymaps/44keys-qwerty/keymap.c
 create mode 100644 keyboards/chavdai40/keymaps/default/config.h
 create mode 100644 keyboards/chavdai40/keymaps/default/keymap.c
 create mode 100644 keyboards/chavdai40/mcuconf.h
 create mode 100644 keyboards/chavdai40/readme.md
 create mode 100644 keyboards/chavdai40/rules.mk

diff --git a/keyboards/chavdai40/boards/GENERIC_STM32_F042X6/board.c b/keyboards/chavdai40/boards/GENERIC_STM32_F042X6/board.c
new file mode 100644
index 000000000..2bd2c5e21
--- /dev/null
+++ b/keyboards/chavdai40/boards/GENERIC_STM32_F042X6/board.c
@@ -0,0 +1,266 @@
+/*
+    ChibiOS - Copyright (C) 2006..2020 Giovanni Di Sirio
+
+    Licensed under the Apache License, Version 2.0 (the "License");
+    you may not use this file except in compliance with the License.
+    You may obtain a copy of the License at
+
+        http://www.apache.org/licenses/LICENSE-2.0
+
+    Unless required by applicable law or agreed to in writing, software
+    distributed under the License is distributed on an "AS IS" BASIS,
+    WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+    See the License for the specific language governing permissions and
+    limitations under the License.
+*/
+
+/*
+ * This file has been automatically generated using ChibiStudio board
+ * generator plugin. Do not edit manually.
+ */
+
+#include "hal.h"
+#include "stm32_gpio.h"
+
+/*===========================================================================*/
+/* Driver local definitions.                                                 */
+/*===========================================================================*/
+
+/*===========================================================================*/
+/* Driver exported variables.                                                */
+/*===========================================================================*/
+
+/*===========================================================================*/
+/* Driver local variables and types.                                         */
+/*===========================================================================*/
+
+/**
+ * @brief   Type of STM32 GPIO port setup.
+ */
+typedef struct {
+  uint32_t              moder;
+  uint32_t              otyper;
+  uint32_t              ospeedr;
+  uint32_t              pupdr;
+  uint32_t              odr;
+  uint32_t              afrl;
+  uint32_t              afrh;
+} gpio_setup_t;
+
+/**
+ * @brief   Type of STM32 GPIO initialization data.
+ */
+typedef struct {
+#if STM32_HAS_GPIOA || defined(__DOXYGEN__)
+  gpio_setup_t          PAData;
+#endif
+#if STM32_HAS_GPIOB || defined(__DOXYGEN__)
+  gpio_setup_t          PBData;
+#endif
+#if STM32_HAS_GPIOC || defined(__DOXYGEN__)
+  gpio_setup_t          PCData;
+#endif
+#if STM32_HAS_GPIOD || defined(__DOXYGEN__)
+  gpio_setup_t          PDData;
+#endif
+#if STM32_HAS_GPIOE || defined(__DOXYGEN__)
+  gpio_setup_t          PEData;
+#endif
+#if STM32_HAS_GPIOF || defined(__DOXYGEN__)
+  gpio_setup_t          PFData;
+#endif
+#if STM32_HAS_GPIOG || defined(__DOXYGEN__)
+  gpio_setup_t          PGData;
+#endif
+#if STM32_HAS_GPIOH || defined(__DOXYGEN__)
+  gpio_setup_t          PHData;
+#endif
+#if STM32_HAS_GPIOI || defined(__DOXYGEN__)
+  gpio_setup_t          PIData;
+#endif
+#if STM32_HAS_GPIOJ || defined(__DOXYGEN__)
+  gpio_setup_t          PJData;
+#endif
+#if STM32_HAS_GPIOK || defined(__DOXYGEN__)
+  gpio_setup_t          PKData;
+#endif
+} gpio_config_t;
+
+/**
+ * @brief   STM32 GPIO static initialization data.
+ */
+static const gpio_config_t gpio_default_config = {
+#if STM32_HAS_GPIOA
+  {VAL_GPIOA_MODER, VAL_GPIOA_OTYPER, VAL_GPIOA_OSPEEDR, VAL_GPIOA_PUPDR,
+   VAL_GPIOA_ODR,   VAL_GPIOA_AFRL,   VAL_GPIOA_AFRH},
+#endif
+#if STM32_HAS_GPIOB
+  {VAL_GPIOB_MODER, VAL_GPIOB_OTYPER, VAL_GPIOB_OSPEEDR, VAL_GPIOB_PUPDR,
+   VAL_GPIOB_ODR,   VAL_GPIOB_AFRL,   VAL_GPIOB_AFRH},
+#endif
+#if STM32_HAS_GPIOC
+  {VAL_GPIOC_MODER, VAL_GPIOC_OTYPER, VAL_GPIOC_OSPEEDR, VAL_GPIOC_PUPDR,
+   VAL_GPIOC_ODR,   VAL_GPIOC_AFRL,   VAL_GPIOC_AFRH},
+#endif
+#if STM32_HAS_GPIOD
+  {VAL_GPIOD_MODER, VAL_GPIOD_OTYPER, VAL_GPIOD_OSPEEDR, VAL_GPIOD_PUPDR,
+   VAL_GPIOD_ODR,   VAL_GPIOD_AFRL,   VAL_GPIOD_AFRH},
+#endif
+#if STM32_HAS_GPIOE
+  {VAL_GPIOE_MODER, VAL_GPIOE_OTYPER, VAL_GPIOE_OSPEEDR, VAL_GPIOE_PUPDR,
+   VAL_GPIOE_ODR,   VAL_GPIOE_AFRL,   VAL_GPIOE_AFRH},
+#endif
+#if STM32_HAS_GPIOF
+  {VAL_GPIOF_MODER, VAL_GPIOF_OTYPER, VAL_GPIOF_OSPEEDR, VAL_GPIOF_PUPDR,
+   VAL_GPIOF_ODR,   VAL_GPIOF_AFRL,   VAL_GPIOF_AFRH},
+#endif
+#if STM32_HAS_GPIOG
+  {VAL_GPIOG_MODER, VAL_GPIOG_OTYPER, VAL_GPIOG_OSPEEDR, VAL_GPIOG_PUPDR,
+   VAL_GPIOG_ODR,   VAL_GPIOG_AFRL,   VAL_GPIOG_AFRH},
+#endif
+#if STM32_HAS_GPIOH
+  {VAL_GPIOH_MODER, VAL_GPIOH_OTYPER, VAL_GPIOH_OSPEEDR, VAL_GPIOH_PUPDR,
+   VAL_GPIOH_ODR,   VAL_GPIOH_AFRL,   VAL_GPIOH_AFRH},
+#endif
+#if STM32_HAS_GPIOI
+  {VAL_GPIOI_MODER, VAL_GPIOI_OTYPER, VAL_GPIOI_OSPEEDR, VAL_GPIOI_PUPDR,
+   VAL_GPIOI_ODR,   VAL_GPIOI_AFRL,   VAL_GPIOI_AFRH},
+#endif
+#if STM32_HAS_GPIOJ
+  {VAL_GPIOJ_MODER, VAL_GPIOJ_OTYPER, VAL_GPIOJ_OSPEEDR, VAL_GPIOJ_PUPDR,
+   VAL_GPIOJ_ODR,   VAL_GPIOJ_AFRL,   VAL_GPIOJ_AFRH},
+#endif
+#if STM32_HAS_GPIOK
+  {VAL_GPIOK_MODER, VAL_GPIOK_OTYPER, VAL_GPIOK_OSPEEDR, VAL_GPIOK_PUPDR,
+   VAL_GPIOK_ODR,   VAL_GPIOK_AFRL,   VAL_GPIOK_AFRH}
+#endif
+};
+
+/*===========================================================================*/
+/* Driver local functions.                                                   */
+/*===========================================================================*/
+
+static void gpio_init(stm32_gpio_t *gpiop, const gpio_setup_t *config) {
+
+  gpiop->OTYPER  = config->otyper;
+  gpiop->OSPEEDR = config->ospeedr;
+  gpiop->PUPDR   = config->pupdr;
+  gpiop->ODR     = config->odr;
+  gpiop->AFRL    = config->afrl;
+  gpiop->AFRH    = config->afrh;
+  gpiop->MODER   = config->moder;
+}
+
+static void stm32_gpio_init(void) {
+
+  /* Enabling GPIO-related clocks, the mask comes from the
+     registry header file.*/
+  rccResetAHB(STM32_GPIO_EN_MASK);
+  rccEnableAHB(STM32_GPIO_EN_MASK, true);
+
+  /* Initializing all the defined GPIO ports.*/
+#if STM32_HAS_GPIOA
+  gpio_init(GPIOA, &gpio_default_config.PAData);
+#endif
+#if STM32_HAS_GPIOB
+  gpio_init(GPIOB, &gpio_default_config.PBData);
+#endif
+#if STM32_HAS_GPIOC
+  gpio_init(GPIOC, &gpio_default_config.PCData);
+#endif
+#if STM32_HAS_GPIOD
+  gpio_init(GPIOD, &gpio_default_config.PDData);
+#endif
+#if STM32_HAS_GPIOE
+  gpio_init(GPIOE, &gpio_default_config.PEData);
+#endif
+#if STM32_HAS_GPIOF
+  gpio_init(GPIOF, &gpio_default_config.PFData);
+#endif
+#if STM32_HAS_GPIOG
+  gpio_init(GPIOG, &gpio_default_config.PGData);
+#endif
+#if STM32_HAS_GPIOH
+  gpio_init(GPIOH, &gpio_default_config.PHData);
+#endif
+#if STM32_HAS_GPIOI
+  gpio_init(GPIOI, &gpio_default_config.PIData);
+#endif
+#if STM32_HAS_GPIOJ
+  gpio_init(GPIOJ, &gpio_default_config.PJData);
+#endif
+#if STM32_HAS_GPIOK
+  gpio_init(GPIOK, &gpio_default_config.PKData);
+#endif
+}
+
+/*===========================================================================*/
+/* Driver interrupt handlers.                                                */
+/*===========================================================================*/
+
+/*===========================================================================*/
+/* Driver exported functions.                                                */
+/*===========================================================================*/
+
+/**
+ * @brief   Early initialization code.
+ * @details GPIO ports and system clocks are initialized before everything
+ *          else.
+ */
+void __early_init(void) {
+
+  stm32_gpio_init();
+  stm32_clock_init();
+}
+
+#if HAL_USE_SDC || defined(__DOXYGEN__)
+/**
+ * @brief   SDC card detection.
+ */
+bool sdc_lld_is_card_inserted(SDCDriver *sdcp) {
+
+  (void)sdcp;
+  /* CHTODO: Fill the implementation.*/
+  return true;
+}
+
+/**
+ * @brief   SDC card write protection detection.
+ */
+bool sdc_lld_is_write_protected(SDCDriver *sdcp) {
+
+  (void)sdcp;
+  /* CHTODO: Fill the implementation.*/
+  return false;
+}
+#endif /* HAL_USE_SDC */
+
+#if HAL_USE_MMC_SPI || defined(__DOXYGEN__)
+/**
+ * @brief   MMC_SPI card detection.
+ */
+bool mmc_lld_is_card_inserted(MMCDriver *mmcp) {
+
+  (void)mmcp;
+  /* CHTODO: Fill the implementation.*/
+  return true;
+}
+
+/**
+ * @brief   MMC_SPI card write protection detection.
+ */
+bool mmc_lld_is_write_protected(MMCDriver *mmcp) {
+
+  (void)mmcp;
+  /* CHTODO: Fill the implementation.*/
+  return false;
+}
+#endif
+
+/**
+ * @brief   Board-specific initialization code.
+ * @note    You can add your board-specific code here.
+ */
+void boardInit(void) {
+
+}
diff --git a/keyboards/chavdai40/boards/GENERIC_STM32_F042X6/board.h b/keyboards/chavdai40/boards/GENERIC_STM32_F042X6/board.h
new file mode 100644
index 000000000..ea8a45029
--- /dev/null
+++ b/keyboards/chavdai40/boards/GENERIC_STM32_F042X6/board.h
@@ -0,0 +1,805 @@
+/*
+    ChibiOS - Copyright (C) 2006..2020 Giovanni Di Sirio
+
+    Licensed under the Apache License, Version 2.0 (the "License");
+    you may not use this file except in compliance with the License.
+    You may obtain a copy of the License at
+
+        http://www.apache.org/licenses/LICENSE-2.0
+
+    Unless required by applicable law or agreed to in writing, software
+    distributed under the License is distributed on an "AS IS" BASIS,
+    WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+    See the License for the specific language governing permissions and
+    limitations under the License.
+*/
+
+/*
+ * This file has been automatically generated using ChibiStudio board
+ * generator plugin. Do not edit manually.
+ */
+
+#ifndef BOARD_H
+#define BOARD_H
+
+/*===========================================================================*/
+/* Driver constants.                                                         */
+/*===========================================================================*/
+
+/*
+ * Setup for ST STM32F0-Discovery board.
+ */
+
+/*
+ * Board identifier.
+ */
+#define BOARD_GENERIC_STM32_F042X6
+#define BOARD_NAME                  "Chavdai40"
+
+/*
+ * Board oscillators-related settings.
+ * NOTE: LSE not fitted.
+ * NOTE: HSE not fitted.
+ */
+#if !defined(STM32_LSECLK)
+#define STM32_LSECLK                0U
+#endif
+
+#define STM32_LSEDRV                (3U << 3U)
+
+#if !defined(STM32_HSECLK)
+#define STM32_HSECLK                0U
+#endif
+
+#define STM32_HSE_BYPASS
+
+/*
+ * MCU type as defined in the ST header.
+ */
+#define STM32F042x6
+
+/*
+ * IO pins assignments.
+ */
+#define GPIOA_BUTTON                0U
+#define GPIOA_PIN1                  1U
+#define GPIOA_PIN2                  2U
+#define GPIOA_PIN3                  3U
+#define GPIOA_PIN4                  4U
+#define GPIOA_PIN5                  5U
+#define GPIOA_PIN6                  6U
+#define GPIOA_PIN7                  7U
+#define GPIOA_PIN8                  8U
+#define GPIOA_PIN9                  9U
+#define GPIOA_PIN10                 10U
+#define GPIOA_PIN11                 11U
+#define GPIOA_PIN12                 12U
+#define GPIOA_SWDAT                 13U
+#define GPIOA_SWCLK                 14U
+#define GPIOA_PIN15                 15U
+
+#define GPIOB_PIN0                  0U
+#define GPIOB_PIN1                  1U
+#define GPIOB_PIN2                  2U
+#define GPIOB_PIN3                  3U
+#define GPIOB_PIN4                  4U
+#define GPIOB_PIN5                  5U
+#define GPIOB_PIN6                  6U
+#define GPIOB_PIN7                  7U
+#define GPIOB_PIN8                  8U
+#define GPIOB_PIN9                  9U
+#define GPIOB_PIN10                 10U
+#define GPIOB_PIN11                 11U
+#define GPIOB_PIN12                 12U
+#define GPIOB_PIN13                 13U
+#define GPIOB_PIN14                 14U
+#define GPIOB_PIN15                 15U
+
+#define GPIOC_PIN0                  0U
+#define GPIOC_PIN1                  1U
+#define GPIOC_PIN2                  2U
+#define GPIOC_PIN3                  3U
+#define GPIOC_PIN4                  4U
+#define GPIOC_PIN5                  5U
+#define GPIOC_PIN6                  6U
+#define GPIOC_PIN7                  7U
+#define GPIOC_LED4                  8U
+#define GPIOC_LED3                  9U
+#define GPIOC_PIN10                 10U
+#define GPIOC_PIN11                 11U
+#define GPIOC_PIN12                 12U
+#define GPIOC_PIN13                 13U
+#define GPIOC_OSC32_IN              14U
+#define GPIOC_OSC32_OUT             15U
+
+#define GPIOD_PIN0                  0U
+#define GPIOD_PIN1                  1U
+#define GPIOD_PIN2                  2U
+#define GPIOD_PIN3                  3U
+#define GPIOD_PIN4                  4U
+#define GPIOD_PIN5                  5U
+#define GPIOD_PIN6                  6U
+#define GPIOD_PIN7                  7U
+#define GPIOD_PIN8                  8U
+#define GPIOD_PIN9                  9U
+#define GPIOD_PIN10                 10U
+#define GPIOD_PIN11                 11U
+#define GPIOD_PIN12                 12U
+#define GPIOD_PIN13                 13U
+#define GPIOD_PIN14                 14U
+#define GPIOD_PIN15                 15U
+
+// #define GPIOF_OSC_IN                0U
+// #define GPIOF_OSC_OUT               1U
+#define GPIOF_I2C1_SDA              0U
+#define GPIOF_I2C1_SCL              1U
+#define GPIOF_PIN2                  2U
+#define GPIOF_PIN3                  3U
+#define GPIOF_PIN4                  4U
+#define GPIOF_PIN5                  5U
+#define GPIOF_PIN6                  6U
+#define GPIOF_PIN7                  7U
+#define GPIOF_PIN8                  8U
+#define GPIOF_PIN9                  9U
+#define GPIOF_PIN10                 10U
+#define GPIOF_PIN11                 11U
+#define GPIOF_PIN12                 12U
+#define GPIOF_PIN13                 13U
+#define GPIOF_PIN14                 14U
+#define GPIOF_PIN15                 15U
+
+/*
+ * IO lines assignments.
+ */
+#define LINE_BUTTON                 PAL_LINE(GPIOA, 0U)
+#define LINE_SWDAT                  PAL_LINE(GPIOA, 13U)
+#define LINE_SWCLK                  PAL_LINE(GPIOA, 14U)
+#define LINE_LED4                   PAL_LINE(GPIOC, 8U)
+#define LINE_LED3                   PAL_LINE(GPIOC, 9U)
+#define LINE_OSC32_IN               PAL_LINE(GPIOC, 14U)
+#define LINE_OSC32_OUT              PAL_LINE(GPIOC, 15U)
+//#define LINE_OSC_IN                 PAL_LINE(GPIOF, 0U)
+//#define LINE_OSC_OUT                PAL_LINE(GPIOF, 1U)
+#define LINE_I2C1_SDA               PAL_LINE(GPIOF, 0U)
+#define LINE_I2C1_SCL               PAL_LINE(GPIOF, 1U)
+
+/*===========================================================================*/
+/* Driver pre-compile time settings.                                         */
+/*===========================================================================*/
+
+/*===========================================================================*/
+/* Derived constants and error checks.                                       */
+/*===========================================================================*/
+
+/*===========================================================================*/
+/* Driver data structures and types.                                         */
+/*===========================================================================*/
+
+/*===========================================================================*/
+/* Driver macros.                                                            */
+/*===========================================================================*/
+
+/*
+ * I/O ports initial setup, this configuration is established soon after reset
+ * in the initialization code.
+ * Please refer to the STM32 Reference Manual for details.
+ */
+#define PIN_MODE_INPUT(n)           (0U << ((n) * 2U))
+#define PIN_MODE_OUTPUT(n)          (1U << ((n) * 2U))
+#define PIN_MODE_ALTERNATE(n)       (2U << ((n) * 2U))
+#define PIN_MODE_ANALOG(n)          (3U << ((n) * 2U))
+#define PIN_ODR_LOW(n)              (0U << (n))
+#define PIN_ODR_HIGH(n)             (1U << (n))
+#define PIN_OTYPE_PUSHPULL(n)       (0U << (n))
+#define PIN_OTYPE_OPENDRAIN(n)      (1U << (n))
+#define PIN_OSPEED_VERYLOW(n)       (0U << ((n) * 2U))
+#define PIN_OSPEED_LOW(n)           (1U << ((n) * 2U))
+#define PIN_OSPEED_MEDIUM(n)        (2U << ((n) * 2U))
+#define PIN_OSPEED_HIGH(n)          (3U << ((n) * 2U))
+#define PIN_PUPDR_FLOATING(n)       (0U << ((n) * 2U))
+#define PIN_PUPDR_PULLUP(n)         (1U << ((n) * 2U))
+#define PIN_PUPDR_PULLDOWN(n)       (2U << ((n) * 2U))
+#define PIN_AFIO_AF(n, v)           ((v) << (((n) % 8U) * 4U))
+
+/*
+ * GPIOA setup:
+ *
+ * PA0  - BUTTON                    (input floating).
+ * PA1  - PIN1                      (input pullup).
+ * PA2  - PIN2                      (input pullup).
+ * PA3  - PIN3                      (input pullup).
+ * PA4  - PIN4                      (input pullup).
+ * PA5  - PIN5                      (input pullup).
+ * PA6  - PIN6                      (input pullup).
+ * PA7  - PIN7                      (input pullup).
+ * PA8  - PIN8                      (input pullup).
+ * PA9  - PIN9                      (input pullup).
+ * PA10 - PIN10                     (input pullup).
+ * PA11 - PIN11                     (input pullup).
+ * PA12 - PIN12                     (input pullup).
+ * PA13 - SWDAT                     (alternate 0).
+ * PA14 - SWCLK                     (alternate 0).
+ * PA15 - PIN15                     (input pullup).
+ */
+#define VAL_GPIOA_MODER             (PIN_MODE_INPUT(GPIOA_BUTTON) |         \
+                                     PIN_MODE_INPUT(GPIOA_PIN1) |           \
+                                     PIN_MODE_INPUT(GPIOA_PIN2) |           \
+                                     PIN_MODE_INPUT(GPIOA_PIN3) |           \
+                                     PIN_MODE_INPUT(GPIOA_PIN4) |           \
+                                     PIN_MODE_INPUT(GPIOA_PIN5) |           \
+                                     PIN_MODE_INPUT(GPIOA_PIN6) |           \
+                                     PIN_MODE_INPUT(GPIOA_PIN7) |           \
+                                     PIN_MODE_INPUT(GPIOA_PIN8) |           \
+                                     PIN_MODE_INPUT(GPIOA_PIN9) |           \
+                                     PIN_MODE_INPUT(GPIOA_PIN10) |          \
+                                     PIN_MODE_INPUT(GPIOA_PIN11) |          \
+                                     PIN_MODE_INPUT(GPIOA_PIN12) |          \
+                                     PIN_MODE_ALTERNATE(GPIOA_SWDAT) |      \
+                                     PIN_MODE_ALTERNATE(GPIOA_SWCLK) |      \
+                                     PIN_MODE_INPUT(GPIOA_PIN15))
+#define VAL_GPIOA_OTYPER            (PIN_OTYPE_PUSHPULL(GPIOA_BUTTON) |     \
+                                     PIN_OTYPE_PUSHPULL(GPIOA_PIN1) |       \
+                                     PIN_OTYPE_PUSHPULL(GPIOA_PIN2) |       \
+                                     PIN_OTYPE_PUSHPULL(GPIOA_PIN3) |       \
+                                     PIN_OTYPE_PUSHPULL(GPIOA_PIN4) |       \
+                                     PIN_OTYPE_PUSHPULL(GPIOA_PIN5) |       \
+                                     PIN_OTYPE_PUSHPULL(GPIOA_PIN6) |       \
+                                     PIN_OTYPE_PUSHPULL(GPIOA_PIN7) |       \
+                                     PIN_OTYPE_PUSHPULL(GPIOA_PIN8) |       \
+                                     PIN_OTYPE_PUSHPULL(GPIOA_PIN9) |       \
+                                     PIN_OTYPE_PUSHPULL(GPIOA_PIN10) |      \
+                                     PIN_OTYPE_PUSHPULL(GPIOA_PIN11) |      \
+                                     PIN_OTYPE_PUSHPULL(GPIOA_PIN12) |      \
+                                     PIN_OTYPE_PUSHPULL(GPIOA_SWDAT) |      \
+                                     PIN_OTYPE_PUSHPULL(GPIOA_SWCLK) |      \
+                                     PIN_OTYPE_PUSHPULL(GPIOA_PIN15))
+#define VAL_GPIOA_OSPEEDR           (PIN_OSPEED_VERYLOW(GPIOA_BUTTON) |     \
+                                     PIN_OSPEED_VERYLOW(GPIOA_PIN1) |       \
+                                     PIN_OSPEED_VERYLOW(GPIOA_PIN2) |       \
+                                     PIN_OSPEED_VERYLOW(GPIOA_PIN3) |       \
+                                     PIN_OSPEED_VERYLOW(GPIOA_PIN4) |       \
+                                     PIN_OSPEED_VERYLOW(GPIOA_PIN5) |       \
+                                     PIN_OSPEED_VERYLOW(GPIOA_PIN6) |       \
+                                     PIN_OSPEED_VERYLOW(GPIOA_PIN7) |       \
+                                     PIN_OSPEED_VERYLOW(GPIOA_PIN8) |       \
+                                     PIN_OSPEED_VERYLOW(GPIOA_PIN9) |       \
+                                     PIN_OSPEED_VERYLOW(GPIOA_PIN10) |      \
+                                     PIN_OSPEED_VERYLOW(GPIOA_PIN11) |      \
+                                     PIN_OSPEED_VERYLOW(GPIOA_PIN12) |      \
+                                     PIN_OSPEED_HIGH(GPIOA_SWDAT) |         \
+                                     PIN_OSPEED_HIGH(GPIOA_SWCLK) |         \
+                                     PIN_OSPEED_HIGH(GPIOA_PIN15))
+#define VAL_GPIOA_PUPDR             (PIN_PUPDR_FLOATING(GPIOA_BUTTON) |     \
+                                     PIN_PUPDR_PULLUP(GPIOA_PIN1) |         \
+                                     PIN_PUPDR_PULLUP(GPIOA_PIN2) |         \
+                                     PIN_PUPDR_PULLUP(GPIOA_PIN3) |         \
+                                     PIN_PUPDR_PULLUP(GPIOA_PIN4) |         \
+                                     PIN_PUPDR_PULLUP(GPIOA_PIN5) |         \
+                                     PIN_PUPDR_PULLUP(GPIOA_PIN6) |         \
+                                     PIN_PUPDR_PULLUP(GPIOA_PIN7) |         \
+                                     PIN_PUPDR_PULLUP(GPIOA_PIN8) |         \
+                                     PIN_PUPDR_PULLUP(GPIOA_PIN9) |         \
+                                     PIN_PUPDR_PULLUP(GPIOA_PIN10) |        \
+                                     PIN_PUPDR_PULLUP(GPIOA_PIN11) |        \
+                                     PIN_PUPDR_PULLUP(GPIOA_PIN12) |        \
+                                     PIN_PUPDR_PULLUP(GPIOA_SWDAT) |        \
+                                     PIN_PUPDR_PULLDOWN(GPIOA_SWCLK) |      \
+                                     PIN_PUPDR_PULLUP(GPIOA_PIN15))
+#define VAL_GPIOA_ODR               (PIN_ODR_HIGH(GPIOA_BUTTON) |           \
+                                     PIN_ODR_HIGH(GPIOA_PIN1) |             \
+                                     PIN_ODR_HIGH(GPIOA_PIN2) |             \
+                                     PIN_ODR_HIGH(GPIOA_PIN3) |             \
+                                     PIN_ODR_HIGH(GPIOA_PIN4) |             \
+                                     PIN_ODR_HIGH(GPIOA_PIN5) |             \
+                                     PIN_ODR_HIGH(GPIOA_PIN6) |             \
+                                     PIN_ODR_HIGH(GPIOA_PIN7) |             \
+                                     PIN_ODR_HIGH(GPIOA_PIN8) |             \
+                                     PIN_ODR_HIGH(GPIOA_PIN9) |             \
+                                     PIN_ODR_HIGH(GPIOA_PIN10) |            \
+                                     PIN_ODR_HIGH(GPIOA_PIN11) |            \
+                                     PIN_ODR_HIGH(GPIOA_PIN12) |            \
+                                     PIN_ODR_HIGH(GPIOA_SWDAT) |            \
+                                     PIN_ODR_HIGH(GPIOA_SWCLK) |            \
+                                     PIN_ODR_HIGH(GPIOA_PIN15))
+#define VAL_GPIOA_AFRL              (PIN_AFIO_AF(GPIOA_BUTTON, 0U) |        \
+                                     PIN_AFIO_AF(GPIOA_PIN1, 0U) |          \
+                                     PIN_AFIO_AF(GPIOA_PIN2, 0U) |          \
+                                     PIN_AFIO_AF(GPIOA_PIN3, 0U) |          \
+                                     PIN_AFIO_AF(GPIOA_PIN4, 0U) |          \
+                                     PIN_AFIO_AF(GPIOA_PIN5, 0U) |          \
+                                     PIN_AFIO_AF(GPIOA_PIN6, 0U) |          \
+                                     PIN_AFIO_AF(GPIOA_PIN7, 0U))
+#define VAL_GPIOA_AFRH              (PIN_AFIO_AF(GPIOA_PIN8, 0U) |          \
+                                     PIN_AFIO_AF(GPIOA_PIN9, 0U) |          \
+                                     PIN_AFIO_AF(GPIOA_PIN10, 0U) |         \
+                                     PIN_AFIO_AF(GPIOA_PIN11, 0U) |         \
+                                     PIN_AFIO_AF(GPIOA_PIN12, 0U) |         \
+                                     PIN_AFIO_AF(GPIOA_SWDAT, 0U) |         \
+                                     PIN_AFIO_AF(GPIOA_SWCLK, 0U) |         \
+                                     PIN_AFIO_AF(GPIOA_PIN15, 0U))
+
+/*
+ * GPIOB setup:
+ *
+ * PB0  - PIN0                      (input pullup).
+ * PB1  - PIN1                      (input pullup).
+ * PB2  - PIN2                      (input pullup).
+ * PB3  - PIN3                      (input pullup).
+ * PB4  - PIN4                      (input pullup).
+ * PB5  - PIN5                      (input pullup).
+ * PB6  - PIN6                      (input pullup).
+ * PB7  - PIN7                      (input pullup).
+ * PB8  - PIN8                      (input pullup).
+ * PB9  - PIN9                      (input pullup).
+ * PB10 - PIN10                     (input pullup).
+ * PB11 - PIN11                     (input pullup).
+ * PB12 - PIN12                     (input pullup).
+ * PB13 - PIN13                     (input pullup).
+ * PB14 - PIN14                     (input pullup).
+ * PB15 - PIN15                     (input pullup).
+ */
+#define VAL_GPIOB_MODER             (PIN_MODE_INPUT(GPIOB_PIN0) |           \
+                                     PIN_MODE_INPUT(GPIOB_PIN1) |           \
+                                     PIN_MODE_INPUT(GPIOB_PIN2) |           \
+                                     PIN_MODE_INPUT(GPIOB_PIN3) |           \
+                                     PIN_MODE_INPUT(GPIOB_PIN4) |           \
+                                     PIN_MODE_INPUT(GPIOB_PIN5) |           \
+                                     PIN_MODE_INPUT(GPIOB_PIN6) |           \
+                                     PIN_MODE_INPUT(GPIOB_PIN7) |           \
+                                     PIN_MODE_INPUT(GPIOB_PIN8) |           \
+                                     PIN_MODE_INPUT(GPIOB_PIN9) |           \
+                                     PIN_MODE_INPUT(GPIOB_PIN10) |          \
+                                     PIN_MODE_INPUT(GPIOB_PIN11) |          \
+                                     PIN_MODE_INPUT(GPIOB_PIN12) |          \
+                                     PIN_MODE_INPUT(GPIOB_PIN13) |          \
+                                     PIN_MODE_INPUT(GPIOB_PIN14) |          \
+                                     PIN_MODE_INPUT(GPIOB_PIN15))
+#define VAL_GPIOB_OTYPER            (PIN_OTYPE_PUSHPULL(GPIOB_PIN0) |       \
+                                     PIN_OTYPE_PUSHPULL(GPIOB_PIN1) |       \
+                                     PIN_OTYPE_PUSHPULL(GPIOB_PIN2) |       \
+                                     PIN_OTYPE_PUSHPULL(GPIOB_PIN3) |       \
+                                     PIN_OTYPE_PUSHPULL(GPIOB_PIN4) |       \
+                                     PIN_OTYPE_PUSHPULL(GPIOB_PIN5) |       \
+                                     PIN_OTYPE_PUSHPULL(GPIOB_PIN6) |       \
+                                     PIN_OTYPE_PUSHPULL(GPIOB_PIN7) |       \
+                                     PIN_OTYPE_PUSHPULL(GPIOB_PIN8) |       \
+                                     PIN_OTYPE_PUSHPULL(GPIOB_PIN9) |       \
+                                     PIN_OTYPE_PUSHPULL(GPIOB_PIN10) |      \
+                                     PIN_OTYPE_PUSHPULL(GPIOB_PIN11) |      \
+                                     PIN_OTYPE_PUSHPULL(GPIOB_PIN12) |      \
+                                     PIN_OTYPE_PUSHPULL(GPIOB_PIN13) |      \
+                                     PIN_OTYPE_PUSHPULL(GPIOB_PIN14) |      \
+                                     PIN_OTYPE_PUSHPULL(GPIOB_PIN15))
+#define VAL_GPIOB_OSPEEDR           (PIN_OSPEED_VERYLOW(GPIOB_PIN0) |       \
+                                     PIN_OSPEED_VERYLOW(GPIOB_PIN1) |       \
+                                     PIN_OSPEED_HIGH(GPIOB_PIN2) |          \
+                                     PIN_OSPEED_HIGH(GPIOB_PIN3) |          \
+                                     PIN_OSPEED_HIGH(GPIOB_PIN4) |          \
+                                     PIN_OSPEED_VERYLOW(GPIOB_PIN5) |       \
+                                     PIN_OSPEED_VERYLOW(GPIOB_PIN6) |       \
+                                     PIN_OSPEED_VERYLOW(GPIOB_PIN7) |       \
+                                     PIN_OSPEED_VERYLOW(GPIOB_PIN8) |       \
+                                     PIN_OSPEED_VERYLOW(GPIOB_PIN9) |       \
+                                     PIN_OSPEED_VERYLOW(GPIOB_PIN10) |      \
+                                     PIN_OSPEED_VERYLOW(GPIOB_PIN11) |      \
+                                     PIN_OSPEED_VERYLOW(GPIOB_PIN12) |      \
+                                     PIN_OSPEED_VERYLOW(GPIOB_PIN13) |      \
+                                     PIN_OSPEED_VERYLOW(GPIOB_PIN14) |      \
+                                     PIN_OSPEED_VERYLOW(GPIOB_PIN15))
+#define VAL_GPIOB_PUPDR             (PIN_PUPDR_PULLUP(GPIOB_PIN0) |         \
+                                     PIN_PUPDR_PULLUP(GPIOB_PIN1) |         \
+                                     PIN_PUPDR_PULLUP(GPIOB_PIN2) |         \
+                                     PIN_PUPDR_PULLUP(GPIOB_PIN3) |         \
+                                     PIN_PUPDR_PULLUP(GPIOB_PIN4) |         \
+                                     PIN_PUPDR_PULLUP(GPIOB_PIN5) |         \
+                                     PIN_PUPDR_PULLUP(GPIOB_PIN6) |         \
+                                     PIN_PUPDR_PULLUP(GPIOB_PIN7) |         \
+                                     PIN_PUPDR_PULLUP(GPIOB_PIN8) |         \
+                                     PIN_PUPDR_PULLUP(GPIOB_PIN9) |         \
+                                     PIN_PUPDR_PULLUP(GPIOB_PIN10) |        \
+                                     PIN_PUPDR_PULLUP(GPIOB_PIN11) |        \
+                                     PIN_PUPDR_PULLUP(GPIOB_PIN12) |        \
+                                     PIN_PUPDR_PULLUP(GPIOB_PIN13) |        \
+                                     PIN_PUPDR_PULLUP(GPIOB_PIN14) |        \
+                                     PIN_PUPDR_PULLUP(GPIOB_PIN15))
+#define VAL_GPIOB_ODR               (PIN_ODR_HIGH(GPIOB_PIN0) |             \
+                                     PIN_ODR_HIGH(GPIOB_PIN1) |             \
+                                     PIN_ODR_HIGH(GPIOB_PIN2) |             \
+                                     PIN_ODR_HIGH(GPIOB_PIN3) |             \
+                                     PIN_ODR_HIGH(GPIOB_PIN4) |             \
+                                     PIN_ODR_HIGH(GPIOB_PIN5) |             \
+                                     PIN_ODR_HIGH(GPIOB_PIN6) |             \
+                                     PIN_ODR_HIGH(GPIOB_PIN7) |             \
+                                     PIN_ODR_HIGH(GPIOB_PIN8) |             \
+                                     PIN_ODR_HIGH(GPIOB_PIN9) |             \
+                                     PIN_ODR_HIGH(GPIOB_PIN10) |            \
+                                     PIN_ODR_HIGH(GPIOB_PIN11) |            \
+                                     PIN_ODR_HIGH(GPIOB_PIN12) |            \
+                                     PIN_ODR_HIGH(GPIOB_PIN13) |            \
+                                     PIN_ODR_HIGH(GPIOB_PIN14) |            \
+                                     PIN_ODR_HIGH(GPIOB_PIN15))
+#define VAL_GPIOB_AFRL              (PIN_AFIO_AF(GPIOB_PIN0, 0U) |          \
+                                     PIN_AFIO_AF(GPIOB_PIN1, 0U) |          \
+                                     PIN_AFIO_AF(GPIOB_PIN2, 0U) |          \
+                                     PIN_AFIO_AF(GPIOB_PIN3, 0U) |          \
+                                     PIN_AFIO_AF(GPIOB_PIN4, 0U) |          \
+                                     PIN_AFIO_AF(GPIOB_PIN5, 0U) |          \
+                                     PIN_AFIO_AF(GPIOB_PIN6, 0U) |          \
+                                     PIN_AFIO_AF(GPIOB_PIN7, 0U))
+#define VAL_GPIOB_AFRH              (PIN_AFIO_AF(GPIOB_PIN8, 0U) |          \
+                                     PIN_AFIO_AF(GPIOB_PIN9, 0U) |          \
+                                     PIN_AFIO_AF(GPIOB_PIN10, 0U) |         \
+                                     PIN_AFIO_AF(GPIOB_PIN11, 0U) |         \
+                                     PIN_AFIO_AF(GPIOB_PIN12, 0U) |         \
+                                     PIN_AFIO_AF(GPIOB_PIN13, 0U) |         \
+                                     PIN_AFIO_AF(GPIOB_PIN14, 0U) |         \
+                                     PIN_AFIO_AF(GPIOB_PIN15, 0U))
+
+/*
+ * GPIOC setup:
+ *
+ * PC0  - PIN0                      (input pullup).
+ * PC1  - PIN1                      (input pullup).
+ * PC2  - PIN2                      (input pullup).
+ * PC3  - PIN3                      (input pullup).
+ * PC4  - PIN4                      (input pullup).
+ * PC5  - PIN5                      (input pullup).
+ * PC6  - PIN6                      (input pullup).
+ * PC7  - PIN7                      (input pullup).
+ * PC8  - LED4                      (output pushpull maximum).
+ * PC9  - LED3                      (output pushpull maximum).
+ * PC10 - PIN10                     (input pullup).
+ * PC11 - PIN11                     (input pullup).
+ * PC12 - PIN12                     (input pullup).
+ * PC13 - PIN13                     (input pullup).
+ * PC14 - OSC32_IN                  (input floating).
+ * PC15 - OSC32_OUT                 (input floating).
+ */
+#define VAL_GPIOC_MODER             (PIN_MODE_INPUT(GPIOC_PIN0) |           \
+                                     PIN_MODE_INPUT(GPIOC_PIN1) |           \
+                                     PIN_MODE_INPUT(GPIOC_PIN2) |           \
+                                     PIN_MODE_INPUT(GPIOC_PIN3) |           \
+                                     PIN_MODE_INPUT(GPIOC_PIN4) |           \
+                                     PIN_MODE_INPUT(GPIOC_PIN5) |           \
+                                     PIN_MODE_INPUT(GPIOC_PIN6) |           \
+                                     PIN_MODE_INPUT(GPIOC_PIN7) |           \
+                                     PIN_MODE_OUTPUT(GPIOC_LED4) |          \
+                                     PIN_MODE_OUTPUT(GPIOC_LED3) |          \
+                                     PIN_MODE_INPUT(GPIOC_PIN10) |          \
+                                     PIN_MODE_INPUT(GPIOC_PIN11) |          \
+                                     PIN_MODE_INPUT(GPIOC_PIN12) |          \
+                                     PIN_MODE_INPUT(GPIOC_PIN13) |          \
+                                     PIN_MODE_INPUT(GPIOC_OSC32_IN) |       \
+                                     PIN_MODE_INPUT(GPIOC_OSC32_OUT))
+#define VAL_GPIOC_OTYPER            (PIN_OTYPE_PUSHPULL(GPIOC_PIN0) |       \
+                                     PIN_OTYPE_PUSHPULL(GPIOC_PIN1) |       \
+                                     PIN_OTYPE_PUSHPULL(GPIOC_PIN2) |       \
+                                     PIN_OTYPE_PUSHPULL(GPIOC_PIN3) |       \
+                                     PIN_OTYPE_PUSHPULL(GPIOC_PIN4) |       \
+                                     PIN_OTYPE_PUSHPULL(GPIOC_PIN5) |       \
+                                     PIN_OTYPE_PUSHPULL(GPIOC_PIN6) |       \
+                                     PIN_OTYPE_PUSHPULL(GPIOC_PIN7) |       \
+                                     PIN_OTYPE_PUSHPULL(GPIOC_LED4) |       \
+                                     PIN_OTYPE_PUSHPULL(GPIOC_LED3) |       \
+                                     PIN_OTYPE_PUSHPULL(GPIOC_PIN10) |      \
+                                     PIN_OTYPE_PUSHPULL(GPIOC_PIN11) |      \
+                                     PIN_OTYPE_PUSHPULL(GPIOC_PIN12) |      \
+                                     PIN_OTYPE_PUSHPULL(GPIOC_PIN13) |      \
+                                     PIN_OTYPE_PUSHPULL(GPIOC_OSC32_IN) |   \
+                                     PIN_OTYPE_PUSHPULL(GPIOC_OSC32_OUT))
+#define VAL_GPIOC_OSPEEDR           (PIN_OSPEED_VERYLOW(GPIOC_PIN0) |       \
+                                     PIN_OSPEED_VERYLOW(GPIOC_PIN1) |       \
+                                     PIN_OSPEED_VERYLOW(GPIOC_PIN2) |       \
+                                     PIN_OSPEED_VERYLOW(GPIOC_PIN3) |       \
+                                     PIN_OSPEED_VERYLOW(GPIOC_PIN4) |       \
+                                     PIN_OSPEED_VERYLOW(GPIOC_PIN5) |       \
+                                     PIN_OSPEED_VERYLOW(GPIOC_PIN6) |       \
+                                     PIN_OSPEED_VERYLOW(GPIOC_PIN7) |       \
+                                     PIN_OSPEED_HIGH(GPIOC_LED4) |          \
+                                     PIN_OSPEED_HIGH(GPIOC_LED3) |          \
+                                     PIN_OSPEED_VERYLOW(GPIOC_PIN10) |      \
+                                     PIN_OSPEED_VERYLOW(GPIOC_PIN11) |      \
+                                     PIN_OSPEED_VERYLOW(GPIOC_PIN12) |      \
+                                     PIN_OSPEED_VERYLOW(GPIOC_PIN13) |      \
+                                     PIN_OSPEED_HIGH(GPIOC_OSC32_IN) |      \
+                                     PIN_OSPEED_HIGH(GPIOC_OSC32_OUT))
+#define VAL_GPIOC_PUPDR             (PIN_PUPDR_PULLUP(GPIOC_PIN0) |         \
+                                     PIN_PUPDR_PULLUP(GPIOC_PIN1) |         \
+                                     PIN_PUPDR_PULLUP(GPIOC_PIN2) |         \
+                                     PIN_PUPDR_PULLUP(GPIOC_PIN3) |         \
+                                     PIN_PUPDR_PULLUP(GPIOC_PIN4) |         \
+                                     PIN_PUPDR_PULLUP(GPIOC_PIN5) |         \
+                                     PIN_PUPDR_PULLUP(GPIOC_PIN6) |         \
+                                     PIN_PUPDR_PULLUP(GPIOC_PIN7) |         \
+                                     PIN_PUPDR_FLOATING(GPIOC_LED4) |       \
+                                     PIN_PUPDR_FLOATING(GPIOC_LED3) |       \
+                                     PIN_PUPDR_PULLUP(GPIOC_PIN10) |        \
+                                     PIN_PUPDR_PULLUP(GPIOC_PIN11) |        \
+                                     PIN_PUPDR_PULLUP(GPIOC_PIN12) |        \
+                                     PIN_PUPDR_PULLUP(GPIOC_PIN13) |        \
+                                     PIN_PUPDR_FLOATING(GPIOC_OSC32_IN) |   \
+                                     PIN_PUPDR_FLOATING(GPIOC_OSC32_OUT))
+#define VAL_GPIOC_ODR               (PIN_ODR_HIGH(GPIOC_PIN0) |             \
+                                     PIN_ODR_HIGH(GPIOC_PIN1) |             \
+                                     PIN_ODR_HIGH(GPIOC_PIN2) |             \
+                                     PIN_ODR_HIGH(GPIOC_PIN3) |             \
+                                     PIN_ODR_HIGH(GPIOC_PIN4) |             \
+                                     PIN_ODR_HIGH(GPIOC_PIN5) |             \
+                                     PIN_ODR_HIGH(GPIOC_PIN6) |             \
+                                     PIN_ODR_HIGH(GPIOC_PIN7) |             \
+                                     PIN_ODR_LOW(GPIOC_LED4) |              \
+                                     PIN_ODR_LOW(GPIOC_LED3) |              \
+                                     PIN_ODR_HIGH(GPIOC_PIN10) |            \
+                                     PIN_ODR_HIGH(GPIOC_PIN11) |            \
+                                     PIN_ODR_HIGH(GPIOC_PIN12) |            \
+                                     PIN_ODR_HIGH(GPIOC_PIN13) |            \
+                                     PIN_ODR_HIGH(GPIOC_OSC32_IN) |         \
+                                     PIN_ODR_HIGH(GPIOC_OSC32_OUT))
+#define VAL_GPIOC_AFRL              (PIN_AFIO_AF(GPIOC_PIN0, 0U) |          \
+                                     PIN_AFIO_AF(GPIOC_PIN1, 0U) |          \
+                                     PIN_AFIO_AF(GPIOC_PIN2, 0U) |          \
+                                     PIN_AFIO_AF(GPIOC_PIN3, 0U) |          \
+                                     PIN_AFIO_AF(GPIOC_PIN4, 0U) |          \
+                                     PIN_AFIO_AF(GPIOC_PIN5, 0U) |          \
+                                     PIN_AFIO_AF(GPIOC_PIN6, 0U) |          \
+                                     PIN_AFIO_AF(GPIOC_PIN7, 0U))
+#define VAL_GPIOC_AFRH              (PIN_AFIO_AF(GPIOC_LED4, 0U) |          \
+                                     PIN_AFIO_AF(GPIOC_LED3, 0U) |          \
+                                     PIN_AFIO_AF(GPIOC_PIN10, 0U) |         \
+                                     PIN_AFIO_AF(GPIOC_PIN11, 0U) |         \
+                                     PIN_AFIO_AF(GPIOC_PIN12, 0U) |         \
+                                     PIN_AFIO_AF(GPIOC_PIN13, 0U) |         \
+                                     PIN_AFIO_AF(GPIOC_OSC32_IN, 0U) |      \
+                                     PIN_AFIO_AF(GPIOC_OSC32_OUT, 0U))
+
+/*
+ * GPIOD setup:
+ *
+ * PD0  - PIN0                      (input pullup).
+ * PD1  - PIN1                      (input pullup).
+ * PD2  - PIN2                      (input pullup).
+ * PD3  - PIN3                      (input pullup).
+ * PD4  - PIN4                      (input pullup).
+ * PD5  - PIN5                      (input pullup).
+ * PD6  - PIN6                      (input pullup).
+ * PD7  - PIN7                      (input pullup).
+ * PD8  - PIN8                      (input pullup).
+ * PD9  - PIN9                      (input pullup).
+ * PD10 - PIN10                     (input pullup).
+ * PD11 - PIN11                     (input pullup).
+ * PD12 - PIN12                     (input pullup).
+ * PD13 - PIN13                     (input pullup).
+ * PD14 - PIN14                     (input pullup).
+ * PD15 - PIN15                     (input pullup).
+ */
+#define VAL_GPIOD_MODER             (PIN_MODE_INPUT(GPIOD_PIN0) |           \
+                                     PIN_MODE_INPUT(GPIOD_PIN1) |           \
+                                     PIN_MODE_INPUT(GPIOD_PIN2) |           \
+                                     PIN_MODE_INPUT(GPIOD_PIN3) |           \
+                                     PIN_MODE_INPUT(GPIOD_PIN4) |           \
+                                     PIN_MODE_INPUT(GPIOD_PIN5) |           \
+                                     PIN_MODE_INPUT(GPIOD_PIN6) |           \
+                                     PIN_MODE_INPUT(GPIOD_PIN7) |           \
+                                     PIN_MODE_INPUT(GPIOD_PIN8) |           \
+                                     PIN_MODE_INPUT(GPIOD_PIN9) |           \
+                                     PIN_MODE_INPUT(GPIOD_PIN10) |          \
+                                     PIN_MODE_INPUT(GPIOD_PIN11) |          \
+                                     PIN_MODE_INPUT(GPIOD_PIN12) |          \
+                                     PIN_MODE_INPUT(GPIOD_PIN13) |          \
+                                     PIN_MODE_INPUT(GPIOD_PIN14) |          \
+                                     PIN_MODE_INPUT(GPIOD_PIN15))
+#define VAL_GPIOD_OTYPER            (PIN_OTYPE_PUSHPULL(GPIOD_PIN0) |       \
+                                     PIN_OTYPE_PUSHPULL(GPIOD_PIN1) |       \
+                                     PIN_OTYPE_PUSHPULL(GPIOD_PIN2) |       \
+                                     PIN_OTYPE_PUSHPULL(GPIOD_PIN3) |       \
+                                     PIN_OTYPE_PUSHPULL(GPIOD_PIN4) |       \
+                                     PIN_OTYPE_PUSHPULL(GPIOD_PIN5) |       \
+                                     PIN_OTYPE_PUSHPULL(GPIOD_PIN6) |       \
+                                     PIN_OTYPE_PUSHPULL(GPIOD_PIN7) |       \
+                                     PIN_OTYPE_PUSHPULL(GPIOD_PIN8) |       \
+                                     PIN_OTYPE_PUSHPULL(GPIOD_PIN9) |       \
+                                     PIN_OTYPE_PUSHPULL(GPIOD_PIN10) |      \
+                                     PIN_OTYPE_PUSHPULL(GPIOD_PIN11) |      \
+                                     PIN_OTYPE_PUSHPULL(GPIOD_PIN12) |      \
+                                     PIN_OTYPE_PUSHPULL(GPIOD_PIN13) |      \
+                                     PIN_OTYPE_PUSHPULL(GPIOD_PIN14) |      \
+                                     PIN_OTYPE_PUSHPULL(GPIOD_PIN15))
+#define VAL_GPIOD_OSPEEDR           (PIN_OSPEED_VERYLOW(GPIOD_PIN0) |       \
+                                     PIN_OSPEED_VERYLOW(GPIOD_PIN1) |       \
+                                     PIN_OSPEED_VERYLOW(GPIOD_PIN2) |       \
+                                     PIN_OSPEED_VERYLOW(GPIOD_PIN3) |       \
+                                     PIN_OSPEED_VERYLOW(GPIOD_PIN4) |       \
+                                     PIN_OSPEED_VERYLOW(GPIOD_PIN5) |       \
+                                     PIN_OSPEED_VERYLOW(GPIOD_PIN6) |       \
+                                     PIN_OSPEED_VERYLOW(GPIOD_PIN7) |       \
+                                     PIN_OSPEED_VERYLOW(GPIOD_PIN8) |       \
+                                     PIN_OSPEED_VERYLOW(GPIOD_PIN9) |       \
+                                     PIN_OSPEED_VERYLOW(GPIOD_PIN10) |      \
+                                     PIN_OSPEED_VERYLOW(GPIOD_PIN11) |      \
+                                     PIN_OSPEED_VERYLOW(GPIOD_PIN12) |      \
+                                     PIN_OSPEED_VERYLOW(GPIOD_PIN13) |      \
+                                     PIN_OSPEED_VERYLOW(GPIOD_PIN14) |      \
+                                     PIN_OSPEED_VERYLOW(GPIOD_PIN15))
+#define VAL_GPIOD_PUPDR             (PIN_PUPDR_PULLUP(GPIOD_PIN0) |         \
+                                     PIN_PUPDR_PULLUP(GPIOD_PIN1) |         \
+                                     PIN_PUPDR_PULLUP(GPIOD_PIN2) |         \
+                                     PIN_PUPDR_PULLUP(GPIOD_PIN3) |         \
+                                     PIN_PUPDR_PULLUP(GPIOD_PIN4) |         \
+                                     PIN_PUPDR_PULLUP(GPIOD_PIN5) |         \
+                                     PIN_PUPDR_PULLUP(GPIOD_PIN6) |         \
+                                     PIN_PUPDR_PULLUP(GPIOD_PIN7) |         \
+                                     PIN_PUPDR_PULLUP(GPIOD_PIN8) |         \
+                                     PIN_PUPDR_PULLUP(GPIOD_PIN9) |         \
+                                     PIN_PUPDR_PULLUP(GPIOD_PIN10) |        \
+                                     PIN_PUPDR_PULLUP(GPIOD_PIN11) |        \
+                                     PIN_PUPDR_PULLUP(GPIOD_PIN12) |        \
+                                     PIN_PUPDR_PULLUP(GPIOD_PIN13) |        \
+                                     PIN_PUPDR_PULLUP(GPIOD_PIN14) |        \
+                                     PIN_PUPDR_PULLUP(GPIOD_PIN15))
+#define VAL_GPIOD_ODR               (PIN_ODR_HIGH(GPIOD_PIN0) |             \
+                                     PIN_ODR_HIGH(GPIOD_PIN1) |             \
+                                     PIN_ODR_HIGH(GPIOD_PIN2) |             \
+                                     PIN_ODR_HIGH(GPIOD_PIN3) |             \
+                                     PIN_ODR_HIGH(GPIOD_PIN4) |             \
+                                     PIN_ODR_HIGH(GPIOD_PIN5) |             \
+                                     PIN_ODR_HIGH(GPIOD_PIN6) |             \
+                                     PIN_ODR_HIGH(GPIOD_PIN7) |             \
+                                     PIN_ODR_HIGH(GPIOD_PIN8) |             \
+                                     PIN_ODR_HIGH(GPIOD_PIN9) |             \
+                                     PIN_ODR_HIGH(GPIOD_PIN10) |            \
+                                     PIN_ODR_HIGH(GPIOD_PIN11) |            \
+                                     PIN_ODR_HIGH(GPIOD_PIN12) |            \
+                                     PIN_ODR_HIGH(GPIOD_PIN13) |            \
+                                     PIN_ODR_HIGH(GPIOD_PIN14) |            \
+                                     PIN_ODR_HIGH(GPIOD_PIN15))
+#define VAL_GPIOD_AFRL              (PIN_AFIO_AF(GPIOD_PIN0, 0U) |          \
+                                     PIN_AFIO_AF(GPIOD_PIN1, 0U) |          \
+                                     PIN_AFIO_AF(GPIOD_PIN2, 0U) |          \
+                                     PIN_AFIO_AF(GPIOD_PIN3, 0U) |          \
+                                     PIN_AFIO_AF(GPIOD_PIN4, 0U) |          \
+                                     PIN_AFIO_AF(GPIOD_PIN5, 0U) |          \
+                                     PIN_AFIO_AF(GPIOD_PIN6, 0U) |          \
+                                     PIN_AFIO_AF(GPIOD_PIN7, 0U))
+#define VAL_GPIOD_AFRH              (PIN_AFIO_AF(GPIOD_PIN8, 0U) |          \
+                                     PIN_AFIO_AF(GPIOD_PIN9, 0U) |          \
+                                     PIN_AFIO_AF(GPIOD_PIN10, 0U) |         \
+                                     PIN_AFIO_AF(GPIOD_PIN11, 0U) |         \
+                                     PIN_AFIO_AF(GPIOD_PIN12, 0U) |         \
+                                     PIN_AFIO_AF(GPIOD_PIN13, 0U) |         \
+                                     PIN_AFIO_AF(GPIOD_PIN14, 0U) |         \
+                                     PIN_AFIO_AF(GPIOD_PIN15, 0U))
+
+/*
+ * GPIOF setup:
+ *
+ ******** PF0  - OSC_IN                    (input floating).
+ ******** PF1  - OSC_OUT                   (input floating).
+ * PF0  - I2C1_SDA                  (alternate 0).
+ * PF1  - I2C1_SCL                  (alternate 0).
+ * PF2  - PIN2                      (input pullup).
+ * PF3  - PIN3                      (input pullup).
+ * PF4  - PIN4                      (input pullup).
+ * PF5  - PIN5                      (input pullup).
+ * PF6  - PIN6                      (input pullup).
+ * PF7  - PIN7                      (input pullup).
+ * PF8  - PIN8                      (input pullup).
+ * PF9  - PIN9                      (input pullup).
+ * PF10 - PIN10                     (input pullup).
+ * PF11 - PIN11                     (input pullup).
+ * PF12 - PIN12                     (input pullup).
+ * PF13 - PIN13                     (input pullup).
+ * PF14 - PIN14                     (input pullup).
+ * PF15 - PIN15                     (input pullup).
+ */
+#define VAL_GPIOF_MODER             (PIN_MODE_ALTERNATE(GPIOF_I2C1_SDA) |         \
+                                     PIN_MODE_ALTERNATE(GPIOF_I2C1_SCL) |        \
+                                     PIN_MODE_INPUT(GPIOF_PIN2) |           \
+                                     PIN_MODE_INPUT(GPIOF_PIN3) |           \
+                                     PIN_MODE_INPUT(GPIOF_PIN4) |           \
+                                     PIN_MODE_INPUT(GPIOF_PIN5) |           \
+                                     PIN_MODE_INPUT(GPIOF_PIN6) |           \
+                                     PIN_MODE_INPUT(GPIOF_PIN7) |           \
+                                     PIN_MODE_INPUT(GPIOF_PIN8) |           \
+                                     PIN_MODE_INPUT(GPIOF_PIN9) |           \
+                                     PIN_MODE_INPUT(GPIOF_PIN10) |          \
+                                     PIN_MODE_INPUT(GPIOF_PIN11) |          \
+                                     PIN_MODE_INPUT(GPIOF_PIN12) |          \
+                                     PIN_MODE_INPUT(GPIOF_PIN13) |          \
+                                     PIN_MODE_INPUT(GPIOF_PIN14) |          \
+                                     PIN_MODE_INPUT(GPIOF_PIN15))
+#define VAL_GPIOF_OTYPER            (PIN_OTYPE_PUSHPULL(GPIOF_I2C1_SDA) |     \
+                                     PIN_OTYPE_PUSHPULL(GPIOF_I2C1_SCL) |    \
+                                     PIN_OTYPE_PUSHPULL(GPIOF_PIN2) |       \
+                                     PIN_OTYPE_PUSHPULL(GPIOF_PIN3) |       \
+                                     PIN_OTYPE_PUSHPULL(GPIOF_PIN4) |       \
+                                     PIN_OTYPE_PUSHPULL(GPIOF_PIN5) |       \
+                                     PIN_OTYPE_PUSHPULL(GPIOF_PIN6) |       \
+                                     PIN_OTYPE_PUSHPULL(GPIOF_PIN7) |       \
+                                     PIN_OTYPE_PUSHPULL(GPIOF_PIN8) |       \
+                                     PIN_OTYPE_PUSHPULL(GPIOF_PIN9) |       \
+                                     PIN_OTYPE_PUSHPULL(GPIOF_PIN10) |      \
+                                     PIN_OTYPE_PUSHPULL(GPIOF_PIN11) |      \
+                                     PIN_OTYPE_PUSHPULL(GPIOF_PIN12) |      \
+                                     PIN_OTYPE_PUSHPULL(GPIOF_PIN13) |      \
+                                     PIN_OTYPE_PUSHPULL(GPIOF_PIN14) |      \
+                                     PIN_OTYPE_PUSHPULL(GPIOF_PIN15))
+#define VAL_GPIOF_OSPEEDR           (PIN_OSPEED_HIGH(GPIOF_I2C1_SDA) |     \
+                                     PIN_OSPEED_HIGH(GPIOF_I2C1_SCL) |    \
+                                     PIN_OSPEED_VERYLOW(GPIOF_PIN2) |       \
+                                     PIN_OSPEED_VERYLOW(GPIOF_PIN3) |       \
+                                     PIN_OSPEED_VERYLOW(GPIOF_PIN4) |       \
+                                     PIN_OSPEED_VERYLOW(GPIOF_PIN5) |       \
+                                     PIN_OSPEED_VERYLOW(GPIOF_PIN6) |       \
+                                     PIN_OSPEED_VERYLOW(GPIOF_PIN7) |       \
+                                     PIN_OSPEED_VERYLOW(GPIOF_PIN8) |       \
+                                     PIN_OSPEED_VERYLOW(GPIOF_PIN9) |       \
+                                     PIN_OSPEED_VERYLOW(GPIOF_PIN10) |      \
+                                     PIN_OSPEED_VERYLOW(GPIOF_PIN11) |      \
+                                     PIN_OSPEED_VERYLOW(GPIOF_PIN12) |      \
+                                     PIN_OSPEED_VERYLOW(GPIOF_PIN13) |      \
+                                     PIN_OSPEED_VERYLOW(GPIOF_PIN14) |      \
+                                     PIN_OSPEED_VERYLOW(GPIOF_PIN15))
+#define VAL_GPIOF_PUPDR             (PIN_PUPDR_PULLUP(GPIOF_I2C1_SDA) |     \
+                                     PIN_PUPDR_PULLUP(GPIOF_I2C1_SCL) |    \
+                                     PIN_PUPDR_PULLUP(GPIOF_PIN2) |         \
+                                     PIN_PUPDR_PULLUP(GPIOF_PIN3) |         \
+                                     PIN_PUPDR_PULLUP(GPIOF_PIN4) |         \
+                                     PIN_PUPDR_PULLUP(GPIOF_PIN5) |         \
+                                     PIN_PUPDR_PULLUP(GPIOF_PIN6) |         \
+                                     PIN_PUPDR_PULLUP(GPIOF_PIN7) |         \
+                                     PIN_PUPDR_PULLUP(GPIOF_PIN8) |         \
+                                     PIN_PUPDR_PULLUP(GPIOF_PIN9) |         \
+                                     PIN_PUPDR_PULLUP(GPIOF_PIN10) |        \
+                                     PIN_PUPDR_PULLUP(GPIOF_PIN11) |        \
+                                     PIN_PUPDR_PULLUP(GPIOF_PIN12) |        \
+                                     PIN_PUPDR_PULLUP(GPIOF_PIN13) |        \
+                                     PIN_PUPDR_PULLUP(GPIOF_PIN14) |        \
+                                     PIN_PUPDR_PULLUP(GPIOF_PIN15))
+#define VAL_GPIOF_ODR               (PIN_ODR_HIGH(GPIOF_I2C1_SDA) |           \
+                                     PIN_ODR_HIGH(GPIOF_I2C1_SCL) |          \
+                                     PIN_ODR_HIGH(GPIOF_PIN2) |             \
+                                     PIN_ODR_HIGH(GPIOF_PIN3) |             \
+                                     PIN_ODR_HIGH(GPIOF_PIN4) |             \
+                                     PIN_ODR_HIGH(GPIOF_PIN5) |             \
+                                     PIN_ODR_HIGH(GPIOF_PIN6) |             \
+                                     PIN_ODR_HIGH(GPIOF_PIN7) |             \
+                                     PIN_ODR_HIGH(GPIOF_PIN8) |             \
+                                     PIN_ODR_HIGH(GPIOF_PIN9) |             \
+                                     PIN_ODR_HIGH(GPIOF_PIN10) |            \
+                                     PIN_ODR_HIGH(GPIOF_PIN11) |            \
+                                     PIN_ODR_HIGH(GPIOF_PIN12) |            \
+                                     PIN_ODR_HIGH(GPIOF_PIN13) |            \
+                                     PIN_ODR_HIGH(GPIOF_PIN14) |            \
+                                     PIN_ODR_HIGH(GPIOF_PIN15))
+#define VAL_GPIOF_AFRL              (PIN_AFIO_AF(GPIOF_I2C1_SDA, 0U) |        \
+                                     PIN_AFIO_AF(GPIOF_I2C1_SCL, 0U) |       \
+                                     PIN_AFIO_AF(GPIOF_PIN2, 0U) |          \
+                                     PIN_AFIO_AF(GPIOF_PIN3, 0U) |          \
+                                     PIN_AFIO_AF(GPIOF_PIN4, 0U) |          \
+                                     PIN_AFIO_AF(GPIOF_PIN5, 0U) |          \
+                                     PIN_AFIO_AF(GPIOF_PIN6, 0U) |          \
+                                     PIN_AFIO_AF(GPIOF_PIN7, 0U))
+#define VAL_GPIOF_AFRH              (PIN_AFIO_AF(GPIOF_PIN8, 0U) |          \
+                                     PIN_AFIO_AF(GPIOF_PIN9, 0U) |          \
+                                     PIN_AFIO_AF(GPIOF_PIN10, 0U) |         \
+                                     PIN_AFIO_AF(GPIOF_PIN11, 0U) |         \
+                                     PIN_AFIO_AF(GPIOF_PIN12, 0U) |         \
+                                     PIN_AFIO_AF(GPIOF_PIN13, 0U) |         \
+                                     PIN_AFIO_AF(GPIOF_PIN14, 0U) |         \
+                                     PIN_AFIO_AF(GPIOF_PIN15, 0U))
+
+/*===========================================================================*/
+/* External declarations.                                                    */
+/*===========================================================================*/
+
+#if !defined(_FROM_ASM_)
+#ifdef __cplusplus
+extern "C" {
+#endif
+  void boardInit(void);
+#ifdef __cplusplus
+}
+#endif
+#endif /* _FROM_ASM_ */
+
+#endif /* BOARD_H */
diff --git a/keyboards/chavdai40/boards/GENERIC_STM32_F042X6/board.mk b/keyboards/chavdai40/boards/GENERIC_STM32_F042X6/board.mk
new file mode 100644
index 000000000..3fff4fbbf
--- /dev/null
+++ b/keyboards/chavdai40/boards/GENERIC_STM32_F042X6/board.mk
@@ -0,0 +1,9 @@
+# List of all the board related files.
+BOARDSRC = $(BOARD_PATH)/boards/GENERIC_STM32_F042X6/board.c
+
+# Required include directories
+BOARDINC = $(BOARD_PATH)/boards/GENERIC_STM32_F042X6
+
+# Shared variables
+ALLCSRC += $(BOARDSRC)
+ALLINC  += $(BOARDINC)
diff --git a/keyboards/chavdai40/bootloader_defs.h b/keyboards/chavdai40/bootloader_defs.h
new file mode 100644
index 000000000..4994be9c2
--- /dev/null
+++ b/keyboards/chavdai40/bootloader_defs.h
@@ -0,0 +1,7 @@
+/* Address for jumping to bootloader on STM32 chips. */
+/* It is chip dependent, the correct number can be looked up here:
+ * http://www.st.com/web/en/resource/technical/document/application_note/CD00167594.pdf
+ * This also requires a patch to chibios:
+ *  <tmk_dir>/tmk_core/tool/chibios/ch-bootloader-jump.patch
+ */
+#define STM32_BOOTLOADER_ADDRESS 0x1FFFC400
\ No newline at end of file
diff --git a/keyboards/chavdai40/chavdai40.c b/keyboards/chavdai40/chavdai40.c
new file mode 100644
index 000000000..6101732e2
--- /dev/null
+++ b/keyboards/chavdai40/chavdai40.c
@@ -0,0 +1,16 @@
+/* Copyright 2020 t-miyajima
+ *
+ * This program is free software: you can redistribute it and/or modify
+ * it under the terms of the GNU General Public License as published by
+ * the Free Software Foundation, either version 2 of the License, or
+ * (at your option) any later version.
+ *
+ * This program is distributed in the hope that it will be useful,
+ * but WITHOUT ANY WARRANTY; without even the implied warranty of
+ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+ * GNU General Public License for more details.
+ *
+ * You should have received a copy of the GNU General Public License
+ * along with this program.  If not, see <http://www.gnu.org/licenses/>.
+ */
+#include "chavdai40.h"
diff --git a/keyboards/chavdai40/chavdai40.h b/keyboards/chavdai40/chavdai40.h
new file mode 100644
index 000000000..a10f695c7
--- /dev/null
+++ b/keyboards/chavdai40/chavdai40.h
@@ -0,0 +1,49 @@
+/* Copyright 2020 t-miyajima
+ *
+ * This program is free software: you can redistribute it and/or modify
+ * it under the terms of the GNU General Public License as published by
+ * the Free Software Foundation, either version 2 of the License, or
+ * (at your option) any later version.
+ *
+ * This program is distributed in the hope that it will be useful,
+ * but WITHOUT ANY WARRANTY; without even the implied warranty of
+ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+ * GNU General Public License for more details.
+ *
+ * You should have received a copy of the GNU General Public License
+ * along with this program.  If not, see <http://www.gnu.org/licenses/>.
+ */
+
+
+#pragma once
+
+#define XXX KC_NO
+
+#include "quantum.h"
+
+// This a shortcut to help you visually see your layout.
+
+#define LAYOUT_44key( \
+    k01, k02, k03, k04, k05, k06, k07, k08, k09, k10, k11, k12, k13, \
+    k14 , k15, k16, k17, k18, k19, k20, k21, k22, k23, k24,  k25   , \
+     k26 ,  k27, k28, k29, k30, k31, k32, k33, k34, k35,  k36,  k37, \
+         k38,  k39,      k40,         k41,   k42,   k43,   k44       \
+) { \
+    { k01, k02, k03, k04, k05, k06, k07, k08, k09, k10, k11, k12, k13 }, \
+    { k14, k15, k16, k17, k18, k19, k20, k21, k22, k23, k24, k25, XXX }, \
+    { k26, k27, k28, k29, k30, k31, k32, k33, k34, k35, k36, k37, XXX }, \
+    { k38, k39, XXX, k40, XXX, k41, XXX, XXX, k42, k43, k44, XXX, XXX }  \
+}
+
+#define LAYOUT_42key( \
+    k01, k02, k03, k04, k05, k06, k07, k08, k09, k10, k11, k12, k13, \
+    k14 , k15, k16, k17, k18, k19, k20, k21, k22, k23, k24,  k25   , \
+     k26 ,  k27, k28, k29, k30, k31, k32, k33, k34, k35,  k36,  k37, \
+         k38,  k39,                   k41,          k43,   k44       \
+) { \
+    { k01, k02, k03, k04, k05, k06, k07, k08, k09, k10, k11, k12, k13 }, \
+    { k14, k15, k16, k17, k18, k19, k20, k21, k22, k23, k24, k25, XXX }, \
+    { k26, k27, k28, k29, k30, k31, k32, k33, k34, k35, k36, k37, XXX }, \
+    { k38, k39, XXX, XXX, XXX, k41, XXX, XXX, XXX, k43, k44, XXX, XXX }  \
+}
+
diff --git a/keyboards/chavdai40/chconf.h b/keyboards/chavdai40/chconf.h
new file mode 100644
index 000000000..6d169b36e
--- /dev/null
+++ b/keyboards/chavdai40/chconf.h
@@ -0,0 +1,714 @@
+/*
+    ChibiOS - Copyright (C) 2006..2018 Giovanni Di Sirio
+
+    Licensed under the Apache License, Version 2.0 (the "License");
+    you may not use this file except in compliance with the License.
+    You may obtain a copy of the License at
+
+        http://www.apache.org/licenses/LICENSE-2.0
+
+    Unless required by applicable law or agreed to in writing, software
+    distributed under the License is distributed on an "AS IS" BASIS,
+    WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+    See the License for the specific language governing permissions and
+    limitations under the License.
+*/
+
+/**
+ * @file    rt/templates/chconf.h
+ * @brief   Configuration file template.
+ * @details A copy of this file must be placed in each project directory, it
+ *          contains the application specific kernel settings.
+ *
+ * @addtogroup config
+ * @details Kernel related settings and hooks.
+ * @{
+ */
+
+#ifndef CHCONF_H
+#define CHCONF_H
+
+#define _CHIBIOS_RT_CONF_
+#define _CHIBIOS_RT_CONF_VER_6_0_
+
+/*===========================================================================*/
+/**
+ * @name System timers settings
+ * @{
+ */
+/*===========================================================================*/
+
+/**
+ * @brief   System time counter resolution.
+ * @note    Allowed values are 16 or 32 bits.
+ */
+#if !defined(CH_CFG_ST_RESOLUTION)
+#define CH_CFG_ST_RESOLUTION                32
+#endif
+
+/**
+ * @brief   System tick frequency.
+ * @details Frequency of the system timer that drives the system ticks. This
+ *          setting also defines the system tick time unit.
+ */
+#if !defined(CH_CFG_ST_FREQUENCY)
+#define CH_CFG_ST_FREQUENCY                 10000
+#endif
+
+/**
+ * @brief   Time intervals data size.
+ * @note    Allowed values are 16, 32 or 64 bits.
+ */
+#if !defined(CH_CFG_INTERVALS_SIZE)
+#define CH_CFG_INTERVALS_SIZE               32
+#endif
+
+/**
+ * @brief   Time types data size.
+ * @note    Allowed values are 16 or 32 bits.
+ */
+#if !defined(CH_CFG_TIME_TYPES_SIZE)
+#define CH_CFG_TIME_TYPES_SIZE              32
+#endif
+
+/**
+ * @brief   Time delta constant for the tick-less mode.
+ * @note    If this value is zero then the system uses the classic
+ *          periodic tick. This value represents the minimum number
+ *          of ticks that is safe to specify in a timeout directive.
+ *          The value one is not valid, timeouts are rounded up to
+ *          this value.
+ */
+#if !defined(CH_CFG_ST_TIMEDELTA)
+#define CH_CFG_ST_TIMEDELTA                 2
+#endif
+
+/** @} */
+
+/*===========================================================================*/
+/**
+ * @name Kernel parameters and options
+ * @{
+ */
+/*===========================================================================*/
+
+/**
+ * @brief   Round robin interval.
+ * @details This constant is the number of system ticks allowed for the
+ *          threads before preemption occurs. Setting this value to zero
+ *          disables the preemption for threads with equal priority and the
+ *          round robin becomes cooperative. Note that higher priority
+ *          threads can still preempt, the kernel is always preemptive.
+ * @note    Disabling the round robin preemption makes the kernel more compact
+ *          and generally faster.
+ * @note    The round robin preemption is not supported in tickless mode and
+ *          must be set to zero in that case.
+ */
+#if !defined(CH_CFG_TIME_QUANTUM)
+#define CH_CFG_TIME_QUANTUM                 0
+#endif
+
+/**
+ * @brief   Managed RAM size.
+ * @details Size of the RAM area to be managed by the OS. If set to zero
+ *          then the whole available RAM is used. The core memory is made
+ *          available to the heap allocator and/or can be used directly through
+ *          the simplified core memory allocator.
+ *
+ * @note    In order to let the OS manage the whole RAM the linker script must
+ *          provide the @p __heap_base__ and @p __heap_end__ symbols.
+ * @note    Requires @p CH_CFG_USE_MEMCORE.
+ */
+#if !defined(CH_CFG_MEMCORE_SIZE)
+#define CH_CFG_MEMCORE_SIZE                 0
+#endif
+
+/**
+ * @brief   Idle thread automatic spawn suppression.
+ * @details When this option is activated the function @p chSysInit()
+ *          does not spawn the idle thread. The application @p main()
+ *          function becomes the idle thread and must implement an
+ *          infinite loop.
+ */
+#if !defined(CH_CFG_NO_IDLE_THREAD)
+#define CH_CFG_NO_IDLE_THREAD               FALSE
+#endif
+
+/** @} */
+
+/*===========================================================================*/
+/**
+ * @name Performance options
+ * @{
+ */
+/*===========================================================================*/
+
+/**
+ * @brief   OS optimization.
+ * @details If enabled then time efficient rather than space efficient code
+ *          is used when two possible implementations exist.
+ *
+ * @note    This is not related to the compiler optimization options.
+ * @note    The default is @p TRUE.
+ */
+#if !defined(CH_CFG_OPTIMIZE_SPEED)
+#define CH_CFG_OPTIMIZE_SPEED               TRUE
+#endif
+
+/** @} */
+
+/*===========================================================================*/
+/**
+ * @name Subsystem options
+ * @{
+ */
+/*===========================================================================*/
+
+/**
+ * @brief   Time Measurement APIs.
+ * @details If enabled then the time measurement APIs are included in
+ *          the kernel.
+ *
+ * @note    The default is @p TRUE.
+ */
+#if !defined(CH_CFG_USE_TM)
+#define CH_CFG_USE_TM                       FALSE
+#endif
+
+/**
+ * @brief   Threads registry APIs.
+ * @details If enabled then the registry APIs are included in the kernel.
+ *
+ * @note    The default is @p TRUE.
+ */
+#if !defined(CH_CFG_USE_REGISTRY)
+#define CH_CFG_USE_REGISTRY                 TRUE
+#endif
+
+/**
+ * @brief   Threads synchronization APIs.
+ * @details If enabled then the @p chThdWait() function is included in
+ *          the kernel.
+ *
+ * @note    The default is @p TRUE.
+ */
+#if !defined(CH_CFG_USE_WAITEXIT)
+#define CH_CFG_USE_WAITEXIT                 TRUE
+#endif
+
+/**
+ * @brief   Semaphores APIs.
+ * @details If enabled then the Semaphores APIs are included in the kernel.
+ *
+ * @note    The default is @p TRUE.
+ */
+#if !defined(CH_CFG_USE_SEMAPHORES)
+#define CH_CFG_USE_SEMAPHORES               TRUE
+#endif
+
+/**
+ * @brief   Semaphores queuing mode.
+ * @details If enabled then the threads are enqueued on semaphores by
+ *          priority rather than in FIFO order.
+ *
+ * @note    The default is @p FALSE. Enable this if you have special
+ *          requirements.
+ * @note    Requires @p CH_CFG_USE_SEMAPHORES.
+ */
+#if !defined(CH_CFG_USE_SEMAPHORES_PRIORITY)
+#define CH_CFG_USE_SEMAPHORES_PRIORITY      FALSE
+#endif
+
+/**
+ * @brief   Mutexes APIs.
+ * @details If enabled then the mutexes APIs are included in the kernel.
+ *
+ * @note    The default is @p TRUE.
+ */
+#if !defined(CH_CFG_USE_MUTEXES)
+#define CH_CFG_USE_MUTEXES                  TRUE
+#endif
+
+/**
+ * @brief   Enables recursive behavior on mutexes.
+ * @note    Recursive mutexes are heavier and have an increased
+ *          memory footprint.
+ *
+ * @note    The default is @p FALSE.
+ * @note    Requires @p CH_CFG_USE_MUTEXES.
+ */
+#if !defined(CH_CFG_USE_MUTEXES_RECURSIVE)
+#define CH_CFG_USE_MUTEXES_RECURSIVE        FALSE
+#endif
+
+/**
+ * @brief   Conditional Variables APIs.
+ * @details If enabled then the conditional variables APIs are included
+ *          in the kernel.
+ *
+ * @note    The default is @p TRUE.
+ * @note    Requires @p CH_CFG_USE_MUTEXES.
+ */
+#if !defined(CH_CFG_USE_CONDVARS)
+#define CH_CFG_USE_CONDVARS                 TRUE
+#endif
+
+/**
+ * @brief   Conditional Variables APIs with timeout.
+ * @details If enabled then the conditional variables APIs with timeout
+ *          specification are included in the kernel.
+ *
+ * @note    The default is @p TRUE.
+ * @note    Requires @p CH_CFG_USE_CONDVARS.
+ */
+#if !defined(CH_CFG_USE_CONDVARS_TIMEOUT)
+#define CH_CFG_USE_CONDVARS_TIMEOUT         TRUE
+#endif
+
+/**
+ * @brief   Events Flags APIs.
+ * @details If enabled then the event flags APIs are included in the kernel.
+ *
+ * @note    The default is @p TRUE.
+ */
+#if !defined(CH_CFG_USE_EVENTS)
+#define CH_CFG_USE_EVENTS                   TRUE
+#endif
+
+/**
+ * @brief   Events Flags APIs with timeout.
+ * @details If enabled then the events APIs with timeout specification
+ *          are included in the kernel.
+ *
+ * @note    The default is @p TRUE.
+ * @note    Requires @p CH_CFG_USE_EVENTS.
+ */
+#if !defined(CH_CFG_USE_EVENTS_TIMEOUT)
+#define CH_CFG_USE_EVENTS_TIMEOUT           TRUE
+#endif
+
+/**
+ * @brief   Synchronous Messages APIs.
+ * @details If enabled then the synchronous messages APIs are included
+ *          in the kernel.
+ *
+ * @note    The default is @p TRUE.
+ */
+#if !defined(CH_CFG_USE_MESSAGES)
+#define CH_CFG_USE_MESSAGES                 TRUE
+#endif
+
+/**
+ * @brief   Synchronous Messages queuing mode.
+ * @details If enabled then messages are served by priority rather than in
+ *          FIFO order.
+ *
+ * @note    The default is @p FALSE. Enable this if you have special
+ *          requirements.
+ * @note    Requires @p CH_CFG_USE_MESSAGES.
+ */
+#if !defined(CH_CFG_USE_MESSAGES_PRIORITY)
+#define CH_CFG_USE_MESSAGES_PRIORITY        FALSE
+#endif
+
+/**
+ * @brief   Mailboxes APIs.
+ * @details If enabled then the asynchronous messages (mailboxes) APIs are
+ *          included in the kernel.
+ *
+ * @note    The default is @p TRUE.
+ * @note    Requires @p CH_CFG_USE_SEMAPHORES.
+ */
+#if !defined(CH_CFG_USE_MAILBOXES)
+#define CH_CFG_USE_MAILBOXES                TRUE
+#endif
+
+/**
+ * @brief   Core Memory Manager APIs.
+ * @details If enabled then the core memory manager APIs are included
+ *          in the kernel.
+ *
+ * @note    The default is @p TRUE.
+ */
+#if !defined(CH_CFG_USE_MEMCORE)
+#define CH_CFG_USE_MEMCORE                  TRUE
+#endif
+
+/**
+ * @brief   Heap Allocator APIs.
+ * @details If enabled then the memory heap allocator APIs are included
+ *          in the kernel.
+ *
+ * @note    The default is @p TRUE.
+ * @note    Requires @p CH_CFG_USE_MEMCORE and either @p CH_CFG_USE_MUTEXES or
+ *          @p CH_CFG_USE_SEMAPHORES.
+ * @note    Mutexes are recommended.
+ */
+#if !defined(CH_CFG_USE_HEAP)
+#define CH_CFG_USE_HEAP                     TRUE
+#endif
+
+/**
+ * @brief   Memory Pools Allocator APIs.
+ * @details If enabled then the memory pools allocator APIs are included
+ *          in the kernel.
+ *
+ * @note    The default is @p TRUE.
+ */
+#if !defined(CH_CFG_USE_MEMPOOLS)
+#define CH_CFG_USE_MEMPOOLS                 TRUE
+#endif
+
+/**
+ * @brief   Objects FIFOs APIs.
+ * @details If enabled then the objects FIFOs APIs are included
+ *          in the kernel.
+ *
+ * @note    The default is @p TRUE.
+ */
+#if !defined(CH_CFG_USE_OBJ_FIFOS)
+#define CH_CFG_USE_OBJ_FIFOS                TRUE
+#endif
+
+/**
+ * @brief   Pipes APIs.
+ * @details If enabled then the pipes APIs are included
+ *          in the kernel.
+ *
+ * @note    The default is @p TRUE.
+ */
+#if !defined(CH_CFG_USE_PIPES)
+#define CH_CFG_USE_PIPES                    TRUE
+#endif
+
+/**
+ * @brief   Dynamic Threads APIs.
+ * @details If enabled then the dynamic threads creation APIs are included
+ *          in the kernel.
+ *
+ * @note    The default is @p TRUE.
+ * @note    Requires @p CH_CFG_USE_WAITEXIT.
+ * @note    Requires @p CH_CFG_USE_HEAP and/or @p CH_CFG_USE_MEMPOOLS.
+ */
+#if !defined(CH_CFG_USE_DYNAMIC)
+#define CH_CFG_USE_DYNAMIC                  TRUE
+#endif
+
+/** @} */
+
+/*===========================================================================*/
+/**
+ * @name Objects factory options
+ * @{
+ */
+/*===========================================================================*/
+
+/**
+ * @brief   Objects Factory APIs.
+ * @details If enabled then the objects factory APIs are included in the
+ *          kernel.
+ *
+ * @note    The default is @p FALSE.
+ */
+#if !defined(CH_CFG_USE_FACTORY)
+#define CH_CFG_USE_FACTORY                  TRUE
+#endif
+
+/**
+ * @brief   Maximum length for object names.
+ * @details If the specified length is zero then the name is stored by
+ *          pointer but this could have unintended side effects.
+ */
+#if !defined(CH_CFG_FACTORY_MAX_NAMES_LENGTH)
+#define CH_CFG_FACTORY_MAX_NAMES_LENGTH     8
+#endif
+
+/**
+ * @brief   Enables the registry of generic objects.
+ */
+#if !defined(CH_CFG_FACTORY_OBJECTS_REGISTRY)
+#define CH_CFG_FACTORY_OBJECTS_REGISTRY     TRUE
+#endif
+
+/**
+ * @brief   Enables factory for generic buffers.
+ */
+#if !defined(CH_CFG_FACTORY_GENERIC_BUFFERS)
+#define CH_CFG_FACTORY_GENERIC_BUFFERS      TRUE
+#endif
+
+/**
+ * @brief   Enables factory for semaphores.
+ */
+#if !defined(CH_CFG_FACTORY_SEMAPHORES)
+#define CH_CFG_FACTORY_SEMAPHORES           TRUE
+#endif
+
+/**
+ * @brief   Enables factory for mailboxes.
+ */
+#if !defined(CH_CFG_FACTORY_MAILBOXES)
+#define CH_CFG_FACTORY_MAILBOXES            TRUE
+#endif
+
+/**
+ * @brief   Enables factory for objects FIFOs.
+ */
+#if !defined(CH_CFG_FACTORY_OBJ_FIFOS)
+#define CH_CFG_FACTORY_OBJ_FIFOS            TRUE
+#endif
+
+/**
+ * @brief   Enables factory for Pipes.
+ */
+#if !defined(CH_CFG_FACTORY_PIPES) || defined(__DOXYGEN__)
+#define CH_CFG_FACTORY_PIPES                TRUE
+#endif
+
+/** @} */
+
+/*===========================================================================*/
+/**
+ * @name Debug options
+ * @{
+ */
+/*===========================================================================*/
+
+/**
+ * @brief   Debug option, kernel statistics.
+ *
+ * @note    The default is @p FALSE.
+ */
+#if !defined(CH_DBG_STATISTICS)
+#define CH_DBG_STATISTICS                   FALSE
+#endif
+
+/**
+ * @brief   Debug option, system state check.
+ * @details If enabled the correct call protocol for system APIs is checked
+ *          at runtime.
+ *
+ * @note    The default is @p FALSE.
+ */
+#if !defined(CH_DBG_SYSTEM_STATE_CHECK)
+#define CH_DBG_SYSTEM_STATE_CHECK           FALSE
+#endif
+
+/**
+ * @brief   Debug option, parameters checks.
+ * @details If enabled then the checks on the API functions input
+ *          parameters are activated.
+ *
+ * @note    The default is @p FALSE.
+ */
+#if !defined(CH_DBG_ENABLE_CHECKS)
+#define CH_DBG_ENABLE_CHECKS                FALSE
+#endif
+
+/**
+ * @brief   Debug option, consistency checks.
+ * @details If enabled then all the assertions in the kernel code are
+ *          activated. This includes consistency checks inside the kernel,
+ *          runtime anomalies and port-defined checks.
+ *
+ * @note    The default is @p FALSE.
+ */
+#if !defined(CH_DBG_ENABLE_ASSERTS)
+#define CH_DBG_ENABLE_ASSERTS               FALSE
+#endif
+
+/**
+ * @brief   Debug option, trace buffer.
+ * @details If enabled then the trace buffer is activated.
+ *
+ * @note    The default is @p CH_DBG_TRACE_MASK_DISABLED.
+ */
+#if !defined(CH_DBG_TRACE_MASK)
+#define CH_DBG_TRACE_MASK                   CH_DBG_TRACE_MASK_DISABLED
+#endif
+
+/**
+ * @brief   Trace buffer entries.
+ * @note    The trace buffer is only allocated if @p CH_DBG_TRACE_MASK is
+ *          different from @p CH_DBG_TRACE_MASK_DISABLED.
+ */
+#if !defined(CH_DBG_TRACE_BUFFER_SIZE)
+#define CH_DBG_TRACE_BUFFER_SIZE            128
+#endif
+
+/**
+ * @brief   Debug option, stack checks.
+ * @details If enabled then a runtime stack check is performed.
+ *
+ * @note    The default is @p FALSE.
+ * @note    The stack check is performed in a architecture/port dependent way.
+ *          It may not be implemented or some ports.
+ * @note    The default failure mode is to halt the system with the global
+ *          @p panic_msg variable set to @p NULL.
+ */
+#if !defined(CH_DBG_ENABLE_STACK_CHECK)
+#define CH_DBG_ENABLE_STACK_CHECK           FALSE
+#endif
+
+/**
+ * @brief   Debug option, stacks initialization.
+ * @details If enabled then the threads working area is filled with a byte
+ *          value when a thread is created. This can be useful for the
+ *          runtime measurement of the used stack.
+ *
+ * @note    The default is @p FALSE.
+ */
+#if !defined(CH_DBG_FILL_THREADS)
+#define CH_DBG_FILL_THREADS                 FALSE
+#endif
+
+/**
+ * @brief   Debug option, threads profiling.
+ * @details If enabled then a field is added to the @p thread_t structure that
+ *          counts the system ticks occurred while executing the thread.
+ *
+ * @note    The default is @p FALSE.
+ * @note    This debug option is not currently compatible with the
+ *          tickless mode.
+ */
+#if !defined(CH_DBG_THREADS_PROFILING)
+#define CH_DBG_THREADS_PROFILING            FALSE
+#endif
+
+/** @} */
+
+/*===========================================================================*/
+/**
+ * @name Kernel hooks
+ * @{
+ */
+/*===========================================================================*/
+
+/**
+ * @brief   System structure extension.
+ * @details User fields added to the end of the @p ch_system_t structure.
+ */
+#define CH_CFG_SYSTEM_EXTRA_FIELDS                                          \
+  /* Add threads custom fields here.*/
+
+/**
+ * @brief   System initialization hook.
+ * @details User initialization code added to the @p chSysInit() function
+ *          just before interrupts are enabled globally.
+ */
+#define CH_CFG_SYSTEM_INIT_HOOK() {                                         \
+  /* Add threads initialization code here.*/                                \
+}
+
+/**
+ * @brief   Threads descriptor structure extension.
+ * @details User fields added to the end of the @p thread_t structure.
+ */
+#define CH_CFG_THREAD_EXTRA_FIELDS                                          \
+  /* Add threads custom fields here.*/
+
+/**
+ * @brief   Threads initialization hook.
+ * @details User initialization code added to the @p _thread_init() function.
+ *
+ * @note    It is invoked from within @p _thread_init() and implicitly from all
+ *          the threads creation APIs.
+ */
+#define CH_CFG_THREAD_INIT_HOOK(tp) {                                       \
+  /* Add threads initialization code here.*/                                \
+}
+
+/**
+ * @brief   Threads finalization hook.
+ * @details User finalization code added to the @p chThdExit() API.
+ */
+#define CH_CFG_THREAD_EXIT_HOOK(tp) {                                       \
+  /* Add threads finalization code here.*/                                  \
+}
+
+/**
+ * @brief   Context switch hook.
+ * @details This hook is invoked just before switching between threads.
+ */
+#define CH_CFG_CONTEXT_SWITCH_HOOK(ntp, otp) {                              \
+  /* Context switch code here.*/                                            \
+}
+
+/**
+ * @brief   ISR enter hook.
+ */
+#define CH_CFG_IRQ_PROLOGUE_HOOK() {                                        \
+  /* IRQ prologue code here.*/                                              \
+}
+
+/**
+ * @brief   ISR exit hook.
+ */
+#define CH_CFG_IRQ_EPILOGUE_HOOK() {                                        \
+  /* IRQ epilogue code here.*/                                              \
+}
+
+/**
+ * @brief   Idle thread enter hook.
+ * @note    This hook is invoked within a critical zone, no OS functions
+ *          should be invoked from here.
+ * @note    This macro can be used to activate a power saving mode.
+ */
+#define CH_CFG_IDLE_ENTER_HOOK() {                                          \
+  /* Idle-enter code here.*/                                                \
+}
+
+/**
+ * @brief   Idle thread leave hook.
+ * @note    This hook is invoked within a critical zone, no OS functions
+ *          should be invoked from here.
+ * @note    This macro can be used to deactivate a power saving mode.
+ */
+#define CH_CFG_IDLE_LEAVE_HOOK() {                                          \
+  /* Idle-leave code here.*/                                                \
+}
+
+/**
+ * @brief   Idle Loop hook.
+ * @details This hook is continuously invoked by the idle thread loop.
+ */
+#define CH_CFG_IDLE_LOOP_HOOK() {                                           \
+  /* Idle loop code here.*/                                                 \
+}
+
+/**
+ * @brief   System tick event hook.
+ * @details This hook is invoked in the system tick handler immediately
+ *          after processing the virtual timers queue.
+ */
+#define CH_CFG_SYSTEM_TICK_HOOK() {                                         \
+  /* System tick event code here.*/                                         \
+}
+
+/**
+ * @brief   System halt hook.
+ * @details This hook is invoked in case to a system halting error before
+ *          the system is halted.
+ */
+#define CH_CFG_SYSTEM_HALT_HOOK(reason) {                                   \
+  /* System halt code here.*/                                               \
+}
+
+/**
+ * @brief   Trace hook.
+ * @details This hook is invoked each time a new record is written in the
+ *          trace buffer.
+ */
+#define CH_CFG_TRACE_HOOK(tep) {                                            \
+  /* Trace code here.*/                                                     \
+}
+
+/** @} */
+
+/*===========================================================================*/
+/* Port-specific settings (override port settings defaulted in chcore.h).    */
+/*===========================================================================*/
+
+#endif  /* CHCONF_H */
+
+/** @} */
diff --git a/keyboards/chavdai40/config.h b/keyboards/chavdai40/config.h
new file mode 100644
index 000000000..a3dcf84e9
--- /dev/null
+++ b/keyboards/chavdai40/config.h
@@ -0,0 +1,74 @@
+/* Copyright 2020 t-miyajima
+ *
+ * This program is free software: you can redistribute it and/or modify
+ * it under the terms of the GNU General Public License as published by
+ * the Free Software Foundation, either version 2 of the License, or
+ * (at your option) any later version.
+ *
+ * This program is distributed in the hope that it will be useful,
+ * but WITHOUT ANY WARRANTY; without even the implied warranty of
+ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+ * GNU General Public License for more details.
+ *
+ * You should have received a copy of the GNU General Public License
+ * along with this program.  If not, see <http://www.gnu.org/licenses/>.
+ */
+
+
+#pragma once
+
+#include "config_common.h"
+
+/* USB Device descriptor parameter */
+#define VENDOR_ID       0x16D0
+#define PRODUCT_ID      0x0F95
+#define DEVICE_VER      0x0001
+#define MANUFACTURER    t-miyajima
+#define PRODUCT         Chavdai40
+
+/* usb power settings */
+#define USB_MAX_POWER_CONSUMPTION 100
+
+/* key matrix size */
+#define MATRIX_ROWS 4
+#define MATRIX_COLS 13
+
+ 
+#define MATRIX_ROW_PINS { A0, A15, B5, B6 }
+#define MATRIX_COL_PINS { B8, B4, B3, B2, B1, B0, A7, A6, A5, A4, A3, A2, A1 }
+#define UNUSED_PINS
+
+/* COL2ROW, ROW2COL*/
+#define DIODE_DIRECTION COL2ROW
+
+/* Debounce reduces chatter (unintended double-presses) - set 0 if debouncing is not needed */
+#define DEBOUNCE 5
+
+/* define if matrix has ghost (lacks anti-ghosting diodes) */
+//#define MATRIX_HAS_GHOST
+
+/* If defined, GRAVE_ESC will always act as ESC when CTRL is held.
+ * This is userful for the Windows task manager shortcut (ctrl+shift+esc).
+ */
+// #define GRAVE_ESC_CTRL_OVERRIDE
+
+/*
+ * Force NKRO
+ *
+ * Force NKRO (nKey Rollover) to be enabled by default, regardless of the saved
+ * state in the bootmagic EEPROM settings. (Note that NKRO must be enabled in the
+ * makefile for this to work.)
+ *
+ * If forced on, NKRO can be disabled via magic key (default = LShift+RShift+N)
+ * until the next keyboard reset.
+ *
+ * NKRO may prevent your keystrokes from being detected in the BIOS, but it is
+ * fully operational during normal computer usage.
+ *
+ * For a less heavy-handed approach, enable NKRO via magic key (LShift+RShift+N)
+ * or via bootmagic (hold SPACE+N while plugging in the keyboard). Once set by
+ * bootmagic, NKRO mode will always be enabled until it is toggled again during a
+ * power-up.
+ *
+ */
+//#define FORCE_NKRO
diff --git a/keyboards/chavdai40/halconf.h b/keyboards/chavdai40/halconf.h
new file mode 100644
index 000000000..383f3a8bb
--- /dev/null
+++ b/keyboards/chavdai40/halconf.h
@@ -0,0 +1,525 @@
+/*
+    ChibiOS - Copyright (C) 2006..2018 Giovanni Di Sirio
+
+    Licensed under the Apache License, Version 2.0 (the "License");
+    you may not use this file except in compliance with the License.
+    You may obtain a copy of the License at
+
+        http://www.apache.org/licenses/LICENSE-2.0
+
+    Unless required by applicable law or agreed to in writing, software
+    distributed under the License is distributed on an "AS IS" BASIS,
+    WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+    See the License for the specific language governing permissions and
+    limitations under the License.
+*/
+
+/**
+ * @file    templates/halconf.h
+ * @brief   HAL configuration header.
+ * @details HAL configuration file, this file allows to enable or disable the
+ *          various device drivers from your application. You may also use
+ *          this file in order to override the device drivers default settings.
+ *
+ * @addtogroup HAL_CONF
+ * @{
+ */
+
+#ifndef HALCONF_H
+#define HALCONF_H
+
+#define _CHIBIOS_HAL_CONF_
+#define _CHIBIOS_HAL_CONF_VER_7_0_
+
+#include "mcuconf.h"
+
+/**
+ * @brief   Enables the PAL subsystem.
+ */
+#if !defined(HAL_USE_PAL) || defined(__DOXYGEN__)
+#define HAL_USE_PAL                         TRUE
+#endif
+
+/**
+ * @brief   Enables the ADC subsystem.
+ */
+#if !defined(HAL_USE_ADC) || defined(__DOXYGEN__)
+#define HAL_USE_ADC                         FALSE
+#endif
+
+/**
+ * @brief   Enables the CAN subsystem.
+ */
+#if !defined(HAL_USE_CAN) || defined(__DOXYGEN__)
+#define HAL_USE_CAN                         FALSE
+#endif
+
+/**
+ * @brief   Enables the cryptographic subsystem.
+ */
+#if !defined(HAL_USE_CRY) || defined(__DOXYGEN__)
+#define HAL_USE_CRY                         FALSE
+#endif
+
+/**
+ * @brief   Enables the DAC subsystem.
+ */
+#if !defined(HAL_USE_DAC) || defined(__DOXYGEN__)
+#define HAL_USE_DAC                         FALSE
+#endif
+
+/**
+ * @brief   Enables the GPT subsystem.
+ */
+#if !defined(HAL_USE_GPT) || defined(__DOXYGEN__)
+#define HAL_USE_GPT                         FALSE
+#endif
+
+/**
+ * @brief   Enables the I2C subsystem.
+ */
+#if !defined(HAL_USE_I2C) || defined(__DOXYGEN__)
+#define HAL_USE_I2C                         FALSE
+#endif
+
+/**
+ * @brief   Enables the I2S subsystem.
+ */
+#if !defined(HAL_USE_I2S) || defined(__DOXYGEN__)
+#define HAL_USE_I2S                         FALSE
+#endif
+
+/**
+ * @brief   Enables the ICU subsystem.
+ */
+#if !defined(HAL_USE_ICU) || defined(__DOXYGEN__)
+#define HAL_USE_ICU                         FALSE
+#endif
+
+/**
+ * @brief   Enables the MAC subsystem.
+ */
+#if !defined(HAL_USE_MAC) || defined(__DOXYGEN__)
+#define HAL_USE_MAC                         FALSE
+#endif
+
+/**
+ * @brief   Enables the MMC_SPI subsystem.
+ */
+#if !defined(HAL_USE_MMC_SPI) || defined(__DOXYGEN__)
+#define HAL_USE_MMC_SPI                     FALSE
+#endif
+
+/**
+ * @brief   Enables the PWM subsystem.
+ */
+#if !defined(HAL_USE_PWM) || defined(__DOXYGEN__)
+#define HAL_USE_PWM                         FALSE
+#endif
+
+/**
+ * @brief   Enables the RTC subsystem.
+ */
+#if !defined(HAL_USE_RTC) || defined(__DOXYGEN__)
+#define HAL_USE_RTC                         FALSE
+#endif
+
+/**
+ * @brief   Enables the SDC subsystem.
+ */
+#if !defined(HAL_USE_SDC) || defined(__DOXYGEN__)
+#define HAL_USE_SDC                         FALSE
+#endif
+
+/**
+ * @brief   Enables the SERIAL subsystem.
+ */
+#if !defined(HAL_USE_SERIAL) || defined(__DOXYGEN__)
+#define HAL_USE_SERIAL                      TRUE
+#endif
+
+/**
+ * @brief   Enables the SERIAL over USB subsystem.
+ */
+#if !defined(HAL_USE_SERIAL_USB) || defined(__DOXYGEN__)
+#define HAL_USE_SERIAL_USB                  FALSE
+#endif
+
+/**
+ * @brief   Enables the SIO subsystem.
+ */
+#if !defined(HAL_USE_SIO) || defined(__DOXYGEN__)
+#define HAL_USE_SIO                         FALSE
+#endif
+
+/**
+ * @brief   Enables the SPI subsystem.
+ */
+#if !defined(HAL_USE_SPI) || defined(__DOXYGEN__)
+#define HAL_USE_SPI                         FALSE
+#endif
+
+/**
+ * @brief   Enables the TRNG subsystem.
+ */
+#if !defined(HAL_USE_TRNG) || defined(__DOXYGEN__)
+#define HAL_USE_TRNG                        FALSE
+#endif
+
+/**
+ * @brief   Enables the UART subsystem.
+ */
+#if !defined(HAL_USE_UART) || defined(__DOXYGEN__)
+#define HAL_USE_UART                        FALSE
+#endif
+
+/**
+ * @brief   Enables the USB subsystem.
+ */
+#if !defined(HAL_USE_USB) || defined(__DOXYGEN__)
+#define HAL_USE_USB                         TRUE
+#endif
+
+/**
+ * @brief   Enables the WDG subsystem.
+ */
+#if !defined(HAL_USE_WDG) || defined(__DOXYGEN__)
+#define HAL_USE_WDG                         FALSE
+#endif
+
+/**
+ * @brief   Enables the WSPI subsystem.
+ */
+#if !defined(HAL_USE_WSPI) || defined(__DOXYGEN__)
+#define HAL_USE_WSPI                        FALSE
+#endif
+
+/*===========================================================================*/
+/* PAL driver related settings.                                              */
+/*===========================================================================*/
+
+/**
+ * @brief   Enables synchronous APIs.
+ * @note    Disabling this option saves both code and data space.
+ */
+#if !defined(PAL_USE_CALLBACKS) || defined(__DOXYGEN__)
+#define PAL_USE_CALLBACKS                   FALSE
+#endif
+
+/**
+ * @brief   Enables synchronous APIs.
+ * @note    Disabling this option saves both code and data space.
+ */
+#if !defined(PAL_USE_WAIT) || defined(__DOXYGEN__)
+#define PAL_USE_WAIT                        FALSE
+#endif
+
+/*===========================================================================*/
+/* ADC driver related settings.                                              */
+/*===========================================================================*/
+
+/**
+ * @brief   Enables synchronous APIs.
+ * @note    Disabling this option saves both code and data space.
+ */
+#if !defined(ADC_USE_WAIT) || defined(__DOXYGEN__)
+#define ADC_USE_WAIT                        TRUE
+#endif
+
+/**
+ * @brief   Enables the @p adcAcquireBus() and @p adcReleaseBus() APIs.
+ * @note    Disabling this option saves both code and data space.
+ */
+#if !defined(ADC_USE_MUTUAL_EXCLUSION) || defined(__DOXYGEN__)
+#define ADC_USE_MUTUAL_EXCLUSION            TRUE
+#endif
+
+/*===========================================================================*/
+/* CAN driver related settings.                                              */
+/*===========================================================================*/
+
+/**
+ * @brief   Sleep mode related APIs inclusion switch.
+ */
+#if !defined(CAN_USE_SLEEP_MODE) || defined(__DOXYGEN__)
+#define CAN_USE_SLEEP_MODE                  TRUE
+#endif
+
+/**
+ * @brief   Enforces the driver to use direct callbacks rather than OSAL events.
+ */
+#if !defined(CAN_ENFORCE_USE_CALLBACKS) || defined(__DOXYGEN__)
+#define CAN_ENFORCE_USE_CALLBACKS           FALSE
+#endif
+
+/*===========================================================================*/
+/* CRY driver related settings.                                              */
+/*===========================================================================*/
+
+/**
+ * @brief   Enables the SW fall-back of the cryptographic driver.
+ * @details When enabled, this option, activates a fall-back software
+ *          implementation for algorithms not supported by the underlying
+ *          hardware.
+ * @note    Fall-back implementations may not be present for all algorithms.
+ */
+#if !defined(HAL_CRY_USE_FALLBACK) || defined(__DOXYGEN__)
+#define HAL_CRY_USE_FALLBACK                FALSE
+#endif
+
+/**
+ * @brief   Makes the driver forcibly use the fall-back implementations.
+ */
+#if !defined(HAL_CRY_ENFORCE_FALLBACK) || defined(__DOXYGEN__)
+#define HAL_CRY_ENFORCE_FALLBACK            FALSE
+#endif
+
+/*===========================================================================*/
+/* DAC driver related settings.                                              */
+/*===========================================================================*/
+
+/**
+ * @brief   Enables synchronous APIs.
+ * @note    Disabling this option saves both code and data space.
+ */
+#if !defined(DAC_USE_WAIT) || defined(__DOXYGEN__)
+#define DAC_USE_WAIT                        TRUE
+#endif
+
+/**
+ * @brief   Enables the @p dacAcquireBus() and @p dacReleaseBus() APIs.
+ * @note    Disabling this option saves both code and data space.
+ */
+#if !defined(DAC_USE_MUTUAL_EXCLUSION) || defined(__DOXYGEN__)
+#define DAC_USE_MUTUAL_EXCLUSION            TRUE
+#endif
+
+/*===========================================================================*/
+/* I2C driver related settings.                                              */
+/*===========================================================================*/
+
+/**
+ * @brief   Enables the mutual exclusion APIs on the I2C bus.
+ */
+#if !defined(I2C_USE_MUTUAL_EXCLUSION) || defined(__DOXYGEN__)
+#define I2C_USE_MUTUAL_EXCLUSION            TRUE
+#endif
+
+/*===========================================================================*/
+/* MAC driver related settings.                                              */
+/*===========================================================================*/
+
+/**
+ * @brief   Enables the zero-copy API.
+ */
+#if !defined(MAC_USE_ZERO_COPY) || defined(__DOXYGEN__)
+#define MAC_USE_ZERO_COPY                   FALSE
+#endif
+
+/**
+ * @brief   Enables an event sources for incoming packets.
+ */
+#if !defined(MAC_USE_EVENTS) || defined(__DOXYGEN__)
+#define MAC_USE_EVENTS                      TRUE
+#endif
+
+/*===========================================================================*/
+/* MMC_SPI driver related settings.                                          */
+/*===========================================================================*/
+
+/**
+ * @brief   Delays insertions.
+ * @details If enabled this options inserts delays into the MMC waiting
+ *          routines releasing some extra CPU time for the threads with
+ *          lower priority, this may slow down the driver a bit however.
+ *          This option is recommended also if the SPI driver does not
+ *          use a DMA channel and heavily loads the CPU.
+ */
+#if !defined(MMC_NICE_WAITING) || defined(__DOXYGEN__)
+#define MMC_NICE_WAITING                    TRUE
+#endif
+
+/*===========================================================================*/
+/* SDC driver related settings.                                              */
+/*===========================================================================*/
+
+/**
+ * @brief   Number of initialization attempts before rejecting the card.
+ * @note    Attempts are performed at 10mS intervals.
+ */
+#if !defined(SDC_INIT_RETRY) || defined(__DOXYGEN__)
+#define SDC_INIT_RETRY                      100
+#endif
+
+/**
+ * @brief   Include support for MMC cards.
+ * @note    MMC support is not yet implemented so this option must be kept
+ *          at @p FALSE.
+ */
+#if !defined(SDC_MMC_SUPPORT) || defined(__DOXYGEN__)
+#define SDC_MMC_SUPPORT                     FALSE
+#endif
+
+/**
+ * @brief   Delays insertions.
+ * @details If enabled this options inserts delays into the MMC waiting
+ *          routines releasing some extra CPU time for the threads with
+ *          lower priority, this may slow down the driver a bit however.
+ */
+#if !defined(SDC_NICE_WAITING) || defined(__DOXYGEN__)
+#define SDC_NICE_WAITING                    TRUE
+#endif
+
+/**
+ * @brief   OCR initialization constant for V20 cards.
+ */
+#if !defined(SDC_INIT_OCR_V20) || defined(__DOXYGEN__)
+#define SDC_INIT_OCR_V20                    0x50FF8000U
+#endif
+
+/**
+ * @brief   OCR initialization constant for non-V20 cards.
+ */
+#if !defined(SDC_INIT_OCR) || defined(__DOXYGEN__)
+#define SDC_INIT_OCR                        0x80100000U
+#endif
+
+/*===========================================================================*/
+/* SERIAL driver related settings.                                           */
+/*===========================================================================*/
+
+/**
+ * @brief   Default bit rate.
+ * @details Configuration parameter, this is the baud rate selected for the
+ *          default configuration.
+ */
+#if !defined(SERIAL_DEFAULT_BITRATE) || defined(__DOXYGEN__)
+#define SERIAL_DEFAULT_BITRATE              38400
+#endif
+
+/**
+ * @brief   Serial buffers size.
+ * @details Configuration parameter, you can change the depth of the queue
+ *          buffers depending on the requirements of your application.
+ * @note    The default is 16 bytes for both the transmission and receive
+ *          buffers.
+ */
+#if !defined(SERIAL_BUFFERS_SIZE) || defined(__DOXYGEN__)
+#define SERIAL_BUFFERS_SIZE                 16
+#endif
+
+/*===========================================================================*/
+/* SERIAL_USB driver related setting.                                        */
+/*===========================================================================*/
+
+/**
+ * @brief   Serial over USB buffers size.
+ * @details Configuration parameter, the buffer size must be a multiple of
+ *          the USB data endpoint maximum packet size.
+ * @note    The default is 256 bytes for both the transmission and receive
+ *          buffers.
+ */
+#if !defined(SERIAL_USB_BUFFERS_SIZE) || defined(__DOXYGEN__)
+#define SERIAL_USB_BUFFERS_SIZE             256
+#endif
+
+/**
+ * @brief   Serial over USB number of buffers.
+ * @note    The default is 2 buffers.
+ */
+#if !defined(SERIAL_USB_BUFFERS_NUMBER) || defined(__DOXYGEN__)
+#define SERIAL_USB_BUFFERS_NUMBER           2
+#endif
+
+/*===========================================================================*/
+/* SPI driver related settings.                                              */
+/*===========================================================================*/
+
+/**
+ * @brief   Enables synchronous APIs.
+ * @note    Disabling this option saves both code and data space.
+ */
+#if !defined(SPI_USE_WAIT) || defined(__DOXYGEN__)
+#define SPI_USE_WAIT                        TRUE
+#endif
+
+/**
+ * @brief   Enables circular transfers APIs.
+ * @note    Disabling this option saves both code and data space.
+ */
+#if !defined(SPI_USE_CIRCULAR) || defined(__DOXYGEN__)
+#define SPI_USE_CIRCULAR                    FALSE
+#endif
+
+
+/**
+ * @brief   Enables the @p spiAcquireBus() and @p spiReleaseBus() APIs.
+ * @note    Disabling this option saves both code and data space.
+ */
+#if !defined(SPI_USE_MUTUAL_EXCLUSION) || defined(__DOXYGEN__)
+#define SPI_USE_MUTUAL_EXCLUSION            TRUE
+#endif
+
+/**
+ * @brief   Handling method for SPI CS line.
+ * @note    Disabling this option saves both code and data space.
+ */
+#if !defined(SPI_SELECT_MODE) || defined(__DOXYGEN__)
+#define SPI_SELECT_MODE                     SPI_SELECT_MODE_PAD
+#endif
+
+/*===========================================================================*/
+/* UART driver related settings.                                             */
+/*===========================================================================*/
+
+/**
+ * @brief   Enables synchronous APIs.
+ * @note    Disabling this option saves both code and data space.
+ */
+#if !defined(UART_USE_WAIT) || defined(__DOXYGEN__)
+#define UART_USE_WAIT                       FALSE
+#endif
+
+/**
+ * @brief   Enables the @p uartAcquireBus() and @p uartReleaseBus() APIs.
+ * @note    Disabling this option saves both code and data space.
+ */
+#if !defined(UART_USE_MUTUAL_EXCLUSION) || defined(__DOXYGEN__)
+#define UART_USE_MUTUAL_EXCLUSION           FALSE
+#endif
+
+/*===========================================================================*/
+/* USB driver related settings.                                              */
+/*===========================================================================*/
+
+/**
+ * @brief   Enables synchronous APIs.
+ * @note    Disabling this option saves both code and data space.
+ */
+#if !defined(USB_USE_WAIT) || defined(__DOXYGEN__)
+#define USB_USE_WAIT                        TRUE
+#endif
+
+/*===========================================================================*/
+/* WSPI driver related settings.                                             */
+/*===========================================================================*/
+
+/**
+ * @brief   Enables synchronous APIs.
+ * @note    Disabling this option saves both code and data space.
+ */
+#if !defined(WSPI_USE_WAIT) || defined(__DOXYGEN__)
+#define WSPI_USE_WAIT                       TRUE
+#endif
+
+/**
+ * @brief   Enables the @p wspiAcquireBus() and @p wspiReleaseBus() APIs.
+ * @note    Disabling this option saves both code and data space.
+ */
+#if !defined(WSPI_USE_MUTUAL_EXCLUSION) || defined(__DOXYGEN__)
+#define WSPI_USE_MUTUAL_EXCLUSION           TRUE
+#endif
+
+#endif /* HALCONF_H */
+
+/** @} */
diff --git a/keyboards/chavdai40/info.json b/keyboards/chavdai40/info.json
new file mode 100644
index 000000000..53007b923
--- /dev/null
+++ b/keyboards/chavdai40/info.json
@@ -0,0 +1,101 @@
+{
+    "keyboard_name": "chavdai40", 
+    "url": "https://github.com/dvorak55/chavdai40", 
+    "maintainer": "t-miyajima", 
+    "width": 14, 
+    "height": 4, 
+    "layouts": {
+        "LAYOUT_44key": {
+            "layout": [
+                {"x":0, "y":0, "w":1.5}, 
+                {"label":"Q", "x":1.5, "y":0}, 
+                {"label":"W", "x":2.5, "y":0}, 
+                {"label":"E", "x":3.5, "y":0}, 
+                {"label":"R", "x":4.5, "y":0}, 
+                {"label":"T", "x":5.5, "y":0}, 
+                {"label":"Y", "x":6.5, "y":0}, 
+                {"label":"U", "x":7.5, "y":0}, 
+                {"label":"I", "x":8.5, "y":0}, 
+                {"label":"O", "x":9.5, "y":0}, 
+                {"label":"P", "x":10.5, "y":0}, 
+                {"label":"_", "x":11.5, "y":0}, 
+                {"label":"Backspace", "x":12.5, "y":0, "w":1.5}, 
+                {"label":"Ctrl", "x":0, "y":1, "w":1.75}, 
+                {"label":"A", "x":1.75, "y":1}, 
+                {"label":"S", "x":2.75, "y":1}, 
+                {"label":"D", "x":3.75, "y":1}, 
+                {"label":"F", "x":4.75, "y":1}, 
+                {"label":"G", "x":5.75, "y":1}, 
+                {"label":"H", "x":6.75, "y":1}, 
+                {"label":"J", "x":7.75, "y":1}, 
+                {"label":"K", "x":8.75, "y":1}, 
+                {"label":"L", "x":9.75, "y":1}, 
+                {"label":":", "x":10.75, "y":1}, 
+                {"label":"Enter", "x":11.75, "y":1, "w":2.25}, 
+                {"label":"Shift", "x":0, "y":2, "w":2.25}, 
+                {"label":"Z", "x":2.25, "y":2}, 
+                {"label":"X", "x":3.25, "y":2}, 
+                {"label":"C", "x":4.25, "y":2}, 
+                {"label":"V", "x":5.25, "y":2}, 
+                {"label":"B", "x":6.25, "y":2}, 
+                {"label":"N", "x":7.25, "y":2}, 
+                {"label":"M", "x":8.25, "y":2}, 
+                {"label":"<", "x":9.25, "y":2}, 
+                {"label":">", "x":10.25, "y":2}, 
+                {"label":"?", "x":11.25, "y":2, "w":1.25}, 
+                {"x":12.5, "y":2, "w":1.25}, 
+                {"label":"Alt", "x":1.38, "y":3, "w":1.25}, 
+                {"label":"Win", "x":2.63, "y":3, "w":1.25}, 
+                {"x":3.88, "y":3, "w":2.25}, 
+                {"x":6.13, "y":3, "w":2.75}, 
+                {"label":"Win", "x":8.88, "y":3, "w":1.25}, 
+                {"label":"Alt", "x":10.13, "y":3, "w":1.25}, 
+                {"label":"Esc", "x":11.38, "y":3, "w":1.25}]
+        },
+        "LAYOUT_42key": {
+            "layout": [
+                {"x":0, "y":0, "w":1.5},
+                {"label":"Q", "x":1.5, "y":0},
+                {"label":"W", "x":2.5, "y":0},
+                {"label":"E", "x":3.5, "y":0},
+                {"label":"R", "x":4.5, "y":0},
+                {"label":"T", "x":5.5, "y":0},
+                {"label":"Y", "x":6.5, "y":0},
+                {"label":"U", "x":7.5, "y":0},
+                {"label":"I", "x":8.5, "y":0},
+                {"label":"O", "x":9.5, "y":0},
+                {"label":"P", "x":10.5, "y":0},
+                {"label":"_", "x":11.5, "y":0},
+                {"label":"Backspace", "x":12.5, "y":0, "w":1.5},
+                {"label":"Ctrl", "x":0, "y":1, "w":1.75},
+                {"label":"A", "x":1.75, "y":1},
+                {"label":"S", "x":2.75, "y":1},
+                {"label":"D", "x":3.75, "y":1},
+                {"label":"F", "x":4.75, "y":1},
+                {"label":"G", "x":5.75, "y":1},
+                {"label":"H", "x":6.75, "y":1},
+                {"label":"J", "x":7.75, "y":1},
+                {"label":"K", "x":8.75, "y":1},
+                {"label":"L", "x":9.75, "y":1},
+                {"label":":", "x":10.75, "y":1},
+                {"label":"Enter", "x":11.75, "y":1, "w":2.25},
+                {"label":"Shift", "x":0, "y":2, "w":2.25},
+                {"label":"Z", "x":2.25, "y":2}, 
+                {"label":"X", "x":3.25, "y":2}, 
+                {"label":"C", "x":4.25, "y":2}, 
+                {"label":"V", "x":5.25, "y":2}, 
+                {"label":"B", "x":6.25, "y":2}, 
+                {"label":"N", "x":7.25, "y":2}, 
+                {"label":"M", "x":8.25, "y":2}, 
+                {"label":"<", "x":9.25, "y":2}, 
+                {"label":">", "x":10.25, "y":2},
+                {"label":"?", "x":11.25, "y":2, "w":1.25},
+                {"x":12.5, "y":2, "w":1.25},
+                {"label":"Alt", "x":1.38, "y":3, "w":1.25},
+                {"label":"Win", "x":2.63, "y":3, "w":1.25},
+                {"x":3.88, "y":3, "w":6.25},
+                {"label":"Win", "x":10.13, "y":3, "w":1.25},
+                {"label":"Alt", "x":11.38, "y":3, "w":1.25}]
+        }
+    }
+}
\ No newline at end of file
diff --git a/keyboards/chavdai40/keymaps/42keys-dvorak/config.h b/keyboards/chavdai40/keymaps/42keys-dvorak/config.h
new file mode 100644
index 000000000..bbcd7cdf9
--- /dev/null
+++ b/keyboards/chavdai40/keymaps/42keys-dvorak/config.h
@@ -0,0 +1,22 @@
+/* Copyright 2020 t-miyajima
+ *
+ * This program is free software: you can redistribute it and/or modify
+ * it under the terms of the GNU General Public License as published by
+ * the Free Software Foundation, either version 2 of the License, or
+ * (at your option) any later version.
+ *
+ * This program is distributed in the hope that it will be useful,
+ * but WITHOUT ANY WARRANTY; without even the implied warranty of
+ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+ * GNU General Public License for more details.
+ *
+ * You should have received a copy of the GNU General Public License
+ * along with this program.  If not, see <http://www.gnu.org/licenses/>.
+ */
+
+#pragma once
+
+// place overrides here
+#define PERMISSIVE_HOLD
+#define RETRO_TAPPING
+#define TAPPING_TERM 5
diff --git a/keyboards/chavdai40/keymaps/42keys-dvorak/keymap.c b/keyboards/chavdai40/keymaps/42keys-dvorak/keymap.c
new file mode 100644
index 000000000..3ea66f5f3
--- /dev/null
+++ b/keyboards/chavdai40/keymaps/42keys-dvorak/keymap.c
@@ -0,0 +1,41 @@
+ /* Copyright 2020 t-miyajima
+ *
+ * This program is free software: you can redistribute it and/or modify
+ * it under the terms of the GNU General Public License as published by
+ * the Free Software Foundation, either version 2 of the License, or
+ * (at your option) any later version.
+ *
+ * This program is distributed in the hope that it will be useful,
+ * but WITHOUT ANY WARRANTY; without even the implied warranty of
+ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+ * GNU General Public License for more details.
+ *
+ * You should have received a copy of the GNU General Public License
+ * along with this program.  If not, see <http://www.gnu.org/licenses/>.
+ */
+#include QMK_KEYBOARD_H
+
+const uint16_t PROGMEM keymaps[][MATRIX_ROWS][MATRIX_COLS] = {
+  /* Keymap _BL: (Base Layer) Default Layer
+   * ,-------------------------------------------------------.
+   * | Tab |  /|  ,|  .|  P|  Y|  F|  G|  C|  R|  L|  -| Bspc|
+   * |-------------------------------------------------------|
+   * | Ctrl  |  A|  O|  E|  U|  I|  D|  H|  T|  N|  S| Return|
+   * |-------------------------------------------------------|
+   * | Shift  |  ;|  Q|  J|  K|  X|  B|  M|  W|  V|   Z| Lyr|
+   * `----.---------------------------------------------.---'
+   *      | Alt |Win |           Space        |Win |Alt |
+   *      `---------------------------------------------'
+   */
+    LAYOUT_42key( /* Base */
+        KC_TAB, KC_SLASH, KC_COMMA, KC_DOT, KC_P, KC_Y, KC_F, KC_G, KC_C, KC_R, KC_L, KC_MINUS, KC_BSPACE,
+        KC_LCTRL, KC_A, KC_O, KC_E, KC_U, KC_I, KC_D, KC_H, KC_T, KC_N, KC_S, KC_ENTER,
+        KC_LSFT, KC_SCOLON, KC_Q, KC_J, KC_K, KC_X, KC_B, KC_M, KC_W, KC_V, KC_Z, MO(1),
+        KC_LALT, KC_LGUI, KC_SPACE, KC_RGUI, KC_RALT),
+    LAYOUT_42key( /* layer 1 */
+        KC_GRAVE, KC_EXCLAIM, KC_AT, KC_HASH, KC_QUOTE, KC_PERCENT, KC_CIRCUMFLEX, KC_AMPERSAND, KC_ASTERISK, KC_LEFT_PAREN, KC_RIGHT_PAREN, KC_LBRACKET, KC_RBRACKET,
+        KC_TRNS, KC_1, KC_2, KC_3, KC_4, KC_5, KC_6, KC_7, KC_8, KC_9, KC_0, KC_TRNS,
+        KC_TRNS, KC_F2, KC_F3, KC_F4, KC_F5, KC_F6, KC_F7, KC_F8, KC_F9, KC_F10, KC_EQUAL, KC_TRNS,
+        KC_TRNS, KC_TRNS, KC_TRNS, KC_TRNS, KC_TRNS),
+};
+
diff --git a/keyboards/chavdai40/keymaps/42keys-eucalyn/config.h b/keyboards/chavdai40/keymaps/42keys-eucalyn/config.h
new file mode 100644
index 000000000..bbcd7cdf9
--- /dev/null
+++ b/keyboards/chavdai40/keymaps/42keys-eucalyn/config.h
@@ -0,0 +1,22 @@
+/* Copyright 2020 t-miyajima
+ *
+ * This program is free software: you can redistribute it and/or modify
+ * it under the terms of the GNU General Public License as published by
+ * the Free Software Foundation, either version 2 of the License, or
+ * (at your option) any later version.
+ *
+ * This program is distributed in the hope that it will be useful,
+ * but WITHOUT ANY WARRANTY; without even the implied warranty of
+ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+ * GNU General Public License for more details.
+ *
+ * You should have received a copy of the GNU General Public License
+ * along with this program.  If not, see <http://www.gnu.org/licenses/>.
+ */
+
+#pragma once
+
+// place overrides here
+#define PERMISSIVE_HOLD
+#define RETRO_TAPPING
+#define TAPPING_TERM 5
diff --git a/keyboards/chavdai40/keymaps/42keys-eucalyn/keymap.c b/keyboards/chavdai40/keymaps/42keys-eucalyn/keymap.c
new file mode 100644
index 000000000..a464a586e
--- /dev/null
+++ b/keyboards/chavdai40/keymaps/42keys-eucalyn/keymap.c
@@ -0,0 +1,40 @@
+ /* Copyright 2020 t-miyajima
+ *
+ * This program is free software: you can redistribute it and/or modify
+ * it under the terms of the GNU General Public License as published by
+ * the Free Software Foundation, either version 2 of the License, or
+ * (at your option) any later version.
+ *
+ * This program is distributed in the hope that it will be useful,
+ * but WITHOUT ANY WARRANTY; without even the implied warranty of
+ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+ * GNU General Public License for more details.
+ *
+ * You should have received a copy of the GNU General Public License
+ * along with this program.  If not, see <http://www.gnu.org/licenses/>.
+ */
+#include QMK_KEYBOARD_H
+
+const uint16_t PROGMEM keymaps[][MATRIX_ROWS][MATRIX_COLS] = {
+  /* Keymap _BL: (Base Layer) Default Layer
+   * ,-------------------------------------------------------.
+   * | Tab |  ;|  ,|  .|  P|  Q|  Y|  G|  D|  M|  F|  -| Bspc|
+   * |-------------------------------------------------------|
+   * | Ctrl  |  A|  O|  E|  I|  U|  B|  N|  T|  R|  S| Return|
+   * |-------------------------------------------------------|
+   * | Shift  |  Z|  X|  C|  V|  W|  H|  J|  K|  L|   /| Lyr|
+   * `----.---------------------------------------------.---'
+   *      | Alt |Win |           Space        |Win |Alt |
+   *      `---------------------------------------------'
+   */
+    LAYOUT_42key( /* Base */
+        KC_TAB, KC_SCOLON, KC_COMMA, KC_DOT, KC_P, KC_Q, KC_Y, KC_G, KC_D, KC_M, KC_F, KC_MINUS, KC_BSPACE,
+        KC_LCTRL, KC_A, KC_O, KC_E, KC_I, KC_U, KC_B, KC_N, KC_T, KC_R, KC_S, KC_ENTER,
+        KC_LSFT, KC_Z, KC_X, KC_C, KC_V, KC_W, KC_H, KC_J, KC_K, KC_L, KC_SLASH, MO(1),
+        KC_LALT, KC_LGUI, KC_SPACE, KC_RGUI, KC_RALT),
+    LAYOUT_42key( /* layer 1 */
+        KC_GRAVE, KC_EXCLAIM, KC_AT, KC_HASH, KC_QUOTE, KC_PERCENT, KC_CIRCUMFLEX, KC_AMPERSAND, KC_ASTERISK, KC_LEFT_PAREN, KC_RIGHT_PAREN, KC_LBRACKET, KC_RBRACKET,
+        KC_TRNS, KC_1, KC_2, KC_3, KC_4, KC_5, KC_6, KC_7, KC_8, KC_9, KC_0, KC_TRNS,
+        KC_TRNS, KC_F2, KC_F3, KC_F4, KC_F5, KC_F6, KC_F7, KC_F8, KC_F9, KC_F10, KC_EQUAL, KC_TRNS,
+        KC_TRNS, KC_TRNS, KC_TRNS, KC_TRNS, KC_TRNS),
+};
diff --git a/keyboards/chavdai40/keymaps/42keys-qwerty/config.h b/keyboards/chavdai40/keymaps/42keys-qwerty/config.h
new file mode 100644
index 000000000..bbcd7cdf9
--- /dev/null
+++ b/keyboards/chavdai40/keymaps/42keys-qwerty/config.h
@@ -0,0 +1,22 @@
+/* Copyright 2020 t-miyajima
+ *
+ * This program is free software: you can redistribute it and/or modify
+ * it under the terms of the GNU General Public License as published by
+ * the Free Software Foundation, either version 2 of the License, or
+ * (at your option) any later version.
+ *
+ * This program is distributed in the hope that it will be useful,
+ * but WITHOUT ANY WARRANTY; without even the implied warranty of
+ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+ * GNU General Public License for more details.
+ *
+ * You should have received a copy of the GNU General Public License
+ * along with this program.  If not, see <http://www.gnu.org/licenses/>.
+ */
+
+#pragma once
+
+// place overrides here
+#define PERMISSIVE_HOLD
+#define RETRO_TAPPING
+#define TAPPING_TERM 5
diff --git a/keyboards/chavdai40/keymaps/42keys-qwerty/keymap.c b/keyboards/chavdai40/keymaps/42keys-qwerty/keymap.c
new file mode 100644
index 000000000..fb5a7bd69
--- /dev/null
+++ b/keyboards/chavdai40/keymaps/42keys-qwerty/keymap.c
@@ -0,0 +1,40 @@
+ /* Copyright 2020 t-miyajima
+ *
+ * This program is free software: you can redistribute it and/or modify
+ * it under the terms of the GNU General Public License as published by
+ * the Free Software Foundation, either version 2 of the License, or
+ * (at your option) any later version.
+ *
+ * This program is distributed in the hope that it will be useful,
+ * but WITHOUT ANY WARRANTY; without even the implied warranty of
+ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+ * GNU General Public License for more details.
+ *
+ * You should have received a copy of the GNU General Public License
+ * along with this program.  If not, see <http://www.gnu.org/licenses/>.
+ */
+#include QMK_KEYBOARD_H
+
+const uint16_t PROGMEM keymaps[][MATRIX_ROWS][MATRIX_COLS] = {
+  /* Keymap _BL: (Base Layer) Default Layer
+   * ,-------------------------------------------------------.
+   * | Tab |  Q|  W|  E|  R|  T|  Y|  U|  I|  O|  P|  -| Bspc|
+   * |-------------------------------------------------------|
+   * | Ctrl  |  A|  S|  D|  F|  G|  H|  J|  K|  L|  ;| Return|
+   * |-------------------------------------------------------|
+   * | Shift  |  Z|  X|  C|  V|  B|  N|  M|  ,|  .|   /| Lyr|
+   * `----.---------------------------------------------.---'
+   *      | Alt |Win |           Space        |Win |Alt |
+   *      `---------------------------------------------'
+   */
+    LAYOUT_42key( /* Base */
+        KC_TAB, KC_Q, KC_W, KC_E, KC_R, KC_T, KC_Y, KC_U, KC_I, KC_O, KC_P, KC_MINUS, KC_BSPACE,
+        KC_LCTRL, KC_A, KC_S, KC_D, KC_F, KC_G, KC_H, KC_J, KC_K, KC_L, KC_SCOLON, KC_ENTER,
+        KC_LSHIFT, KC_Z, KC_X, KC_C, KC_V, KC_B, KC_N, KC_M, KC_COMMA, KC_DOT, KC_SLASH, MO(1),
+        KC_LALT, KC_LGUI, KC_SPACE, KC_RGUI, KC_RALT),
+    LAYOUT_42key( /* layer 1 */
+        KC_GRAVE, KC_EXCLAIM, KC_AT, KC_HASH, KC_QUOTE, KC_PERCENT, KC_CIRCUMFLEX, KC_AMPERSAND, KC_ASTERISK, KC_LEFT_PAREN, KC_RIGHT_PAREN, KC_LBRACKET, KC_RBRACKET,
+        KC_TRNS, KC_1, KC_2, KC_3, KC_4, KC_5, KC_6, KC_7, KC_8, KC_9, KC_0, KC_TRNS,
+        KC_TRNS, KC_F2, KC_F3, KC_F4, KC_F5, KC_F6, KC_F7, KC_F8, KC_F9, KC_F10, KC_EQUAL, KC_TRNS,
+        KC_TRNS, KC_TRNS, KC_TRNS, KC_TRNS, KC_TRNS),
+};
diff --git a/keyboards/chavdai40/keymaps/44keys-dvorak/config.h b/keyboards/chavdai40/keymaps/44keys-dvorak/config.h
new file mode 100644
index 000000000..bbcd7cdf9
--- /dev/null
+++ b/keyboards/chavdai40/keymaps/44keys-dvorak/config.h
@@ -0,0 +1,22 @@
+/* Copyright 2020 t-miyajima
+ *
+ * This program is free software: you can redistribute it and/or modify
+ * it under the terms of the GNU General Public License as published by
+ * the Free Software Foundation, either version 2 of the License, or
+ * (at your option) any later version.
+ *
+ * This program is distributed in the hope that it will be useful,
+ * but WITHOUT ANY WARRANTY; without even the implied warranty of
+ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+ * GNU General Public License for more details.
+ *
+ * You should have received a copy of the GNU General Public License
+ * along with this program.  If not, see <http://www.gnu.org/licenses/>.
+ */
+
+#pragma once
+
+// place overrides here
+#define PERMISSIVE_HOLD
+#define RETRO_TAPPING
+#define TAPPING_TERM 5
diff --git a/keyboards/chavdai40/keymaps/44keys-dvorak/keymap.c b/keyboards/chavdai40/keymaps/44keys-dvorak/keymap.c
new file mode 100644
index 000000000..09dd15e71
--- /dev/null
+++ b/keyboards/chavdai40/keymaps/44keys-dvorak/keymap.c
@@ -0,0 +1,40 @@
+ /* Copyright 2020 t-miyajima
+ *
+ * This program is free software: you can redistribute it and/or modify
+ * it under the terms of the GNU General Public License as published by
+ * the Free Software Foundation, either version 2 of the License, or
+ * (at your option) any later version.
+ *
+ * This program is distributed in the hope that it will be useful,
+ * but WITHOUT ANY WARRANTY; without even the implied warranty of
+ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+ * GNU General Public License for more details.
+ *
+ * You should have received a copy of the GNU General Public License
+ * along with this program.  If not, see <http://www.gnu.org/licenses/>.
+ */
+#include QMK_KEYBOARD_H
+
+const uint16_t PROGMEM keymaps[][MATRIX_ROWS][MATRIX_COLS] = {
+  /* Keymap _BL: (Base Layer) Default Layer
+   * ,-------------------------------------------------------.
+   * | Tab |  /|  ,|  .|  P|  Y|  F|  G|  C|  R|  L|  -| Bspc|
+   * |-------------------------------------------------------|
+   * | Ctrl  |  A|  O|  E|  U|  I|  D|  H|  T|  N|  S| Return|
+   * |-------------------------------------------------------|
+   * | Shift  |  ;|  Q|  J|  K|  X|  B|  M|  W|  V|   Z| Del|
+   * `----.---------------------------------------------.---'
+   *      | Alt |Win | Layer |   Space   |Win |Alt |Esc |
+   *      `---------------------------------------------'
+   */
+    LAYOUT_44key( /* Base */
+        KC_TAB, KC_SLASH, KC_COMMA, KC_DOT, KC_P, KC_Y, KC_F, KC_G, KC_C, KC_R, KC_L, KC_MINUS, KC_BSPACE,
+        KC_LCTRL, KC_A, KC_O, KC_E, KC_U, KC_I, KC_D, KC_H, KC_T, KC_N, KC_S, KC_ENTER,
+        KC_LSFT, KC_SCOLON, KC_Q, KC_J, KC_K, KC_X, KC_B, KC_M, KC_W, KC_V, KC_Z, KC_DELETE,
+        KC_LALT, KC_LGUI, MO(1), KC_SPACE, KC_RGUI, KC_RALT, KC_ESCAPE),
+    LAYOUT_44key( /* layer 1 */
+        KC_GRAVE, KC_EXCLAIM, KC_AT, KC_HASH, KC_QUOTE, KC_PERCENT, KC_CIRCUMFLEX, KC_AMPERSAND, KC_ASTERISK, KC_LEFT_PAREN, KC_RIGHT_PAREN, KC_LBRACKET, KC_RBRACKET,
+        KC_TRNS, KC_1, KC_2, KC_3, KC_4, KC_5, KC_6, KC_7, KC_8, KC_9, KC_0, KC_TRNS,
+        KC_TRNS, KC_F2, KC_F3, KC_F4, KC_F5, KC_F6, KC_F7, KC_F8, KC_F9, KC_F10, KC_EQUAL, KC_TRNS,
+        KC_TRNS, KC_TRNS, KC_TRNS, KC_TRNS, KC_TRNS, KC_TRNS, KC_TRNS),
+};
diff --git a/keyboards/chavdai40/keymaps/44keys-eucalyn/config.h b/keyboards/chavdai40/keymaps/44keys-eucalyn/config.h
new file mode 100644
index 000000000..bbcd7cdf9
--- /dev/null
+++ b/keyboards/chavdai40/keymaps/44keys-eucalyn/config.h
@@ -0,0 +1,22 @@
+/* Copyright 2020 t-miyajima
+ *
+ * This program is free software: you can redistribute it and/or modify
+ * it under the terms of the GNU General Public License as published by
+ * the Free Software Foundation, either version 2 of the License, or
+ * (at your option) any later version.
+ *
+ * This program is distributed in the hope that it will be useful,
+ * but WITHOUT ANY WARRANTY; without even the implied warranty of
+ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+ * GNU General Public License for more details.
+ *
+ * You should have received a copy of the GNU General Public License
+ * along with this program.  If not, see <http://www.gnu.org/licenses/>.
+ */
+
+#pragma once
+
+// place overrides here
+#define PERMISSIVE_HOLD
+#define RETRO_TAPPING
+#define TAPPING_TERM 5
diff --git a/keyboards/chavdai40/keymaps/44keys-eucalyn/keymap.c b/keyboards/chavdai40/keymaps/44keys-eucalyn/keymap.c
new file mode 100644
index 000000000..a8a48899e
--- /dev/null
+++ b/keyboards/chavdai40/keymaps/44keys-eucalyn/keymap.c
@@ -0,0 +1,40 @@
+ /* Copyright 2020 t-miyajima
+ *
+ * This program is free software: you can redistribute it and/or modify
+ * it under the terms of the GNU General Public License as published by
+ * the Free Software Foundation, either version 2 of the License, or
+ * (at your option) any later version.
+ *
+ * This program is distributed in the hope that it will be useful,
+ * but WITHOUT ANY WARRANTY; without even the implied warranty of
+ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+ * GNU General Public License for more details.
+ *
+ * You should have received a copy of the GNU General Public License
+ * along with this program.  If not, see <http://www.gnu.org/licenses/>.
+ */
+#include QMK_KEYBOARD_H
+
+const uint16_t PROGMEM keymaps[][MATRIX_ROWS][MATRIX_COLS] = {
+  /* Keymap _BL: (Base Layer) Default Layer
+   * ,-------------------------------------------------------.
+   * | Tab |  ;|  ,|  .|  P|  Q|  Y|  G|  D|  M|  F|  -| Bspc|
+   * |-------------------------------------------------------|
+   * | Ctrl  |  A|  O|  E|  I|  U|  B|  N|  T|  R|  S| Return|
+   * |-------------------------------------------------------|
+   * | Shift  |  Z|  X|  C|  V|  W|  H|  J|  K|  L|   /| Del|
+   * `----.---------------------------------------------.---'
+   *      | Alt |Win | Layer |   Space   |Win |Alt |Esc |
+   *      `---------------------------------------------'
+   */
+    LAYOUT_44key( /* Base */
+        KC_TAB, KC_SCOLON, KC_COMMA, KC_DOT, KC_P, KC_Q, KC_Y, KC_G, KC_D, KC_M, KC_F, KC_MINUS, KC_BSPACE,
+        KC_LCTRL, KC_A, KC_O, KC_E, KC_I, KC_U, KC_B, KC_N, KC_T, KC_R, KC_S, KC_ENTER,
+        KC_LSFT, KC_Z, KC_X, KC_C, KC_V, KC_W, KC_H, KC_J, KC_K, KC_L, KC_SLASH, KC_DELETE,
+        KC_LALT, KC_LGUI, MO(1), KC_SPACE, KC_RGUI, KC_RALT, KC_ESCAPE),
+    LAYOUT_44key( /* layer 1 */
+        KC_GRAVE, KC_EXCLAIM, KC_AT, KC_HASH, KC_QUOTE, KC_PERCENT, KC_CIRCUMFLEX, KC_AMPERSAND, KC_ASTERISK, KC_LEFT_PAREN, KC_RIGHT_PAREN, KC_LBRACKET, KC_RBRACKET,
+        KC_TRNS, KC_1, KC_2, KC_3, KC_4, KC_5, KC_6, KC_7, KC_8, KC_9, KC_0, KC_TRNS,
+        KC_TRNS, KC_F2, KC_F3, KC_F4, KC_F5, KC_F6, KC_F7, KC_F8, KC_F9, KC_F10, KC_EQUAL, KC_TRNS,
+        KC_TRNS, KC_TRNS, KC_TRNS, KC_TRNS, KC_TRNS, KC_TRNS, KC_TRNS),
+};
diff --git a/keyboards/chavdai40/keymaps/44keys-qwerty/config.h b/keyboards/chavdai40/keymaps/44keys-qwerty/config.h
new file mode 100644
index 000000000..bbcd7cdf9
--- /dev/null
+++ b/keyboards/chavdai40/keymaps/44keys-qwerty/config.h
@@ -0,0 +1,22 @@
+/* Copyright 2020 t-miyajima
+ *
+ * This program is free software: you can redistribute it and/or modify
+ * it under the terms of the GNU General Public License as published by
+ * the Free Software Foundation, either version 2 of the License, or
+ * (at your option) any later version.
+ *
+ * This program is distributed in the hope that it will be useful,
+ * but WITHOUT ANY WARRANTY; without even the implied warranty of
+ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+ * GNU General Public License for more details.
+ *
+ * You should have received a copy of the GNU General Public License
+ * along with this program.  If not, see <http://www.gnu.org/licenses/>.
+ */
+
+#pragma once
+
+// place overrides here
+#define PERMISSIVE_HOLD
+#define RETRO_TAPPING
+#define TAPPING_TERM 5
diff --git a/keyboards/chavdai40/keymaps/44keys-qwerty/keymap.c b/keyboards/chavdai40/keymaps/44keys-qwerty/keymap.c
new file mode 100644
index 000000000..b709b34fb
--- /dev/null
+++ b/keyboards/chavdai40/keymaps/44keys-qwerty/keymap.c
@@ -0,0 +1,40 @@
+ /* Copyright 2020 t-miyajima
+ *
+ * This program is free software: you can redistribute it and/or modify
+ * it under the terms of the GNU General Public License as published by
+ * the Free Software Foundation, either version 2 of the License, or
+ * (at your option) any later version.
+ *
+ * This program is distributed in the hope that it will be useful,
+ * but WITHOUT ANY WARRANTY; without even the implied warranty of
+ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+ * GNU General Public License for more details.
+ *
+ * You should have received a copy of the GNU General Public License
+ * along with this program.  If not, see <http://www.gnu.org/licenses/>.
+ */
+#include QMK_KEYBOARD_H
+
+const uint16_t PROGMEM keymaps[][MATRIX_ROWS][MATRIX_COLS] = {
+  /* Keymap _BL: (Base Layer) Default Layer
+   * ,-------------------------------------------------------.
+   * | Tab |  Q|  W|  E|  R|  T|  Y|  U|  I|  O|  P|  -| Bspc|
+   * |-------------------------------------------------------|
+   * | Ctrl  |  A|  S|  D|  F|  G|  H|  J|  K|  L|  ;| Return|
+   * |-------------------------------------------------------|
+   * | Shift  |  Z|  X|  C|  V|  B|  N|  M|  ,|  .|   /| Del|
+   * `----.---------------------------------------------.---'
+   *      | Alt |Win | Layer |   Space   |Win |Alt |Esc |
+   *      `---------------------------------------------'
+   */
+    LAYOUT_44key( /* Base */
+        KC_TAB, KC_Q, KC_W, KC_E, KC_R, KC_T, KC_Y, KC_U, KC_I, KC_O, KC_P, KC_MINUS, KC_BSPACE,
+        KC_LCTRL, KC_A, KC_S, KC_D, KC_F, KC_G, KC_H, KC_J, KC_K, KC_L, KC_SCOLON, KC_ENTER,
+        KC_LSHIFT, KC_Z, KC_X, KC_C, KC_V, KC_B, KC_N, KC_M, KC_COMMA, KC_DOT, KC_SLASH, KC_DELETE,
+        KC_LALT, KC_LGUI, MO(1), KC_SPACE, KC_RGUI, KC_RALT, KC_ESCAPE),
+    LAYOUT_44key( /* layer 1 */
+        KC_GRAVE, KC_EXCLAIM, KC_AT, KC_HASH, KC_QUOTE, KC_PERCENT, KC_CIRCUMFLEX, KC_AMPERSAND, KC_ASTERISK, KC_LEFT_PAREN, KC_RIGHT_PAREN, KC_LBRACKET, KC_RBRACKET,
+        KC_TRNS, KC_1, KC_2, KC_3, KC_4, KC_5, KC_6, KC_7, KC_8, KC_9, KC_0, KC_TRNS,
+        KC_TRNS, KC_F2, KC_F3, KC_F4, KC_F5, KC_F6, KC_F7, KC_F8, KC_F9, KC_F10, KC_EQUAL, KC_TRNS,
+        KC_TRNS, KC_TRNS, KC_TRNS, KC_TRNS, KC_TRNS, KC_TRNS, KC_TRNS),
+};
diff --git a/keyboards/chavdai40/keymaps/default/config.h b/keyboards/chavdai40/keymaps/default/config.h
new file mode 100644
index 000000000..bbcd7cdf9
--- /dev/null
+++ b/keyboards/chavdai40/keymaps/default/config.h
@@ -0,0 +1,22 @@
+/* Copyright 2020 t-miyajima
+ *
+ * This program is free software: you can redistribute it and/or modify
+ * it under the terms of the GNU General Public License as published by
+ * the Free Software Foundation, either version 2 of the License, or
+ * (at your option) any later version.
+ *
+ * This program is distributed in the hope that it will be useful,
+ * but WITHOUT ANY WARRANTY; without even the implied warranty of
+ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+ * GNU General Public License for more details.
+ *
+ * You should have received a copy of the GNU General Public License
+ * along with this program.  If not, see <http://www.gnu.org/licenses/>.
+ */
+
+#pragma once
+
+// place overrides here
+#define PERMISSIVE_HOLD
+#define RETRO_TAPPING
+#define TAPPING_TERM 5
diff --git a/keyboards/chavdai40/keymaps/default/keymap.c b/keyboards/chavdai40/keymaps/default/keymap.c
new file mode 100644
index 000000000..b709b34fb
--- /dev/null
+++ b/keyboards/chavdai40/keymaps/default/keymap.c
@@ -0,0 +1,40 @@
+ /* Copyright 2020 t-miyajima
+ *
+ * This program is free software: you can redistribute it and/or modify
+ * it under the terms of the GNU General Public License as published by
+ * the Free Software Foundation, either version 2 of the License, or
+ * (at your option) any later version.
+ *
+ * This program is distributed in the hope that it will be useful,
+ * but WITHOUT ANY WARRANTY; without even the implied warranty of
+ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+ * GNU General Public License for more details.
+ *
+ * You should have received a copy of the GNU General Public License
+ * along with this program.  If not, see <http://www.gnu.org/licenses/>.
+ */
+#include QMK_KEYBOARD_H
+
+const uint16_t PROGMEM keymaps[][MATRIX_ROWS][MATRIX_COLS] = {
+  /* Keymap _BL: (Base Layer) Default Layer
+   * ,-------------------------------------------------------.
+   * | Tab |  Q|  W|  E|  R|  T|  Y|  U|  I|  O|  P|  -| Bspc|
+   * |-------------------------------------------------------|
+   * | Ctrl  |  A|  S|  D|  F|  G|  H|  J|  K|  L|  ;| Return|
+   * |-------------------------------------------------------|
+   * | Shift  |  Z|  X|  C|  V|  B|  N|  M|  ,|  .|   /| Del|
+   * `----.---------------------------------------------.---'
+   *      | Alt |Win | Layer |   Space   |Win |Alt |Esc |
+   *      `---------------------------------------------'
+   */
+    LAYOUT_44key( /* Base */
+        KC_TAB, KC_Q, KC_W, KC_E, KC_R, KC_T, KC_Y, KC_U, KC_I, KC_O, KC_P, KC_MINUS, KC_BSPACE,
+        KC_LCTRL, KC_A, KC_S, KC_D, KC_F, KC_G, KC_H, KC_J, KC_K, KC_L, KC_SCOLON, KC_ENTER,
+        KC_LSHIFT, KC_Z, KC_X, KC_C, KC_V, KC_B, KC_N, KC_M, KC_COMMA, KC_DOT, KC_SLASH, KC_DELETE,
+        KC_LALT, KC_LGUI, MO(1), KC_SPACE, KC_RGUI, KC_RALT, KC_ESCAPE),
+    LAYOUT_44key( /* layer 1 */
+        KC_GRAVE, KC_EXCLAIM, KC_AT, KC_HASH, KC_QUOTE, KC_PERCENT, KC_CIRCUMFLEX, KC_AMPERSAND, KC_ASTERISK, KC_LEFT_PAREN, KC_RIGHT_PAREN, KC_LBRACKET, KC_RBRACKET,
+        KC_TRNS, KC_1, KC_2, KC_3, KC_4, KC_5, KC_6, KC_7, KC_8, KC_9, KC_0, KC_TRNS,
+        KC_TRNS, KC_F2, KC_F3, KC_F4, KC_F5, KC_F6, KC_F7, KC_F8, KC_F9, KC_F10, KC_EQUAL, KC_TRNS,
+        KC_TRNS, KC_TRNS, KC_TRNS, KC_TRNS, KC_TRNS, KC_TRNS, KC_TRNS),
+};
diff --git a/keyboards/chavdai40/mcuconf.h b/keyboards/chavdai40/mcuconf.h
new file mode 100644
index 000000000..0cc575d40
--- /dev/null
+++ b/keyboards/chavdai40/mcuconf.h
@@ -0,0 +1,190 @@
+/*
+    ChibiOS - Copyright (C) 2006..2018 Giovanni Di Sirio
+
+    Licensed under the Apache License, Version 2.0 (the "License");
+    you may not use this file except in compliance with the License.
+    You may obtain a copy of the License at
+
+        http://www.apache.org/licenses/LICENSE-2.0
+
+    Unless required by applicable law or agreed to in writing, software
+    distributed under the License is distributed on an "AS IS" BASIS,
+    WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+    See the License for the specific language governing permissions and
+    limitations under the License.
+*/
+
+#ifndef MCUCONF_H
+#define MCUCONF_H
+
+/*
+ * STM32F0xx drivers configuration.
+ * The following settings override the default settings present in
+ * the various device driver implementation headers.
+ * Note that the settings for each driver only have effect if the whole
+ * driver is enabled in halconf.h.
+ *
+ * IRQ priorities:
+ * 3...0       Lowest...Highest.
+ *
+ * DMA priorities:
+ * 0...3        Lowest...Highest.
+ */
+
+#define STM32F0xx_MCUCONF
+
+/*
+ * HAL driver system settings.
+ */
+#define STM32_NO_INIT                       FALSE
+#define STM32_PVD_ENABLE                    FALSE
+#define STM32_PLS                           STM32_PLS_LEV0
+#define STM32_HSI_ENABLED                   TRUE
+#define STM32_HSI14_ENABLED                 TRUE
+#define STM32_HSI48_ENABLED                 FALSE
+#define STM32_LSI_ENABLED                   TRUE
+#define STM32_HSE_ENABLED                   FALSE
+#define STM32_LSE_ENABLED                   FALSE
+#define STM32_SW                            STM32_SW_PLL
+#define STM32_PLLSRC                        STM32_PLLSRC_HSI_DIV2
+#define STM32_PREDIV_VALUE                  1
+#define STM32_PLLMUL_VALUE                  12
+#define STM32_HPRE                          STM32_HPRE_DIV1
+#define STM32_PPRE                          STM32_PPRE_DIV1
+#define STM32_MCOSEL                        STM32_MCOSEL_NOCLOCK
+#define STM32_MCOPRE                        STM32_MCOPRE_DIV1
+#define STM32_PLLNODIV                      STM32_PLLNODIV_DIV2
+#define STM32_USBSW                         STM32_USBSW_HSI48
+#define STM32_CECSW                         STM32_CECSW_HSI
+#define STM32_I2C1SW                        STM32_I2C1SW_HSI
+#define STM32_USART1SW                      STM32_USART1SW_PCLK
+#define STM32_RTCSEL                        STM32_RTCSEL_LSI
+
+/*
+ * IRQ system settings.
+ */
+#define STM32_IRQ_EXTI0_1_IRQ_PRIORITY      3
+#define STM32_IRQ_EXTI2_3_IRQ_PRIORITY      3
+#define STM32_IRQ_EXTI4_15_IRQ_PRIORITY     3
+#define STM32_IRQ_EXTI16_IRQ_PRIORITY       3
+#define STM32_IRQ_EXTI17_20_IRQ_PRIORITY    3
+#define STM32_IRQ_EXTI21_22_IRQ_PRIORITY    3
+
+/*
+ * ADC driver system settings.
+ */
+#define STM32_ADC_USE_ADC1                  FALSE
+#define STM32_ADC_ADC1_CKMODE               STM32_ADC_CKMODE_ADCCLK
+#define STM32_ADC_ADC1_DMA_PRIORITY         2
+#define STM32_ADC_ADC1_DMA_IRQ_PRIORITY     2
+#define STM32_ADC_ADC1_DMA_STREAM           STM32_DMA_STREAM_ID(1, 1)
+
+/*
+ * GPT driver system settings.
+ */
+#define STM32_GPT_USE_TIM1                  FALSE
+#define STM32_GPT_USE_TIM2                  FALSE
+#define STM32_GPT_USE_TIM3                  FALSE
+#define STM32_GPT_USE_TIM14                 FALSE
+#define STM32_GPT_TIM1_IRQ_PRIORITY         2
+#define STM32_GPT_TIM2_IRQ_PRIORITY         2
+#define STM32_GPT_TIM3_IRQ_PRIORITY         2
+#define STM32_GPT_TIM14_IRQ_PRIORITY        2
+
+/*
+ * I2C driver system settings.
+ */
+#define STM32_I2C_USE_I2C1                  FALSE
+#define STM32_I2C_BUSY_TIMEOUT              50
+#define STM32_I2C_I2C1_IRQ_PRIORITY         3
+#define STM32_I2C_USE_DMA                   TRUE
+#define STM32_I2C_I2C1_DMA_PRIORITY         1
+#define STM32_I2C_I2C1_RX_DMA_STREAM        STM32_DMA_STREAM_ID(1, 3)
+#define STM32_I2C_I2C1_TX_DMA_STREAM        STM32_DMA_STREAM_ID(1, 2)
+#define STM32_I2C_DMA_ERROR_HOOK(i2cp)      osalSysHalt("DMA failure")
+
+/*
+ * I2S driver system settings.
+ */
+#define STM32_I2S_USE_SPI1                  FALSE
+#define STM32_I2S_SPI1_MODE                 (STM32_I2S_MODE_MASTER |        \
+                                             STM32_I2S_MODE_RX)
+#define STM32_I2S_SPI1_IRQ_PRIORITY         2
+#define STM32_I2S_SPI1_DMA_PRIORITY         1
+#define STM32_I2S_SPI1_RX_DMA_STREAM        STM32_DMA_STREAM_ID(1, 2)
+#define STM32_I2S_SPI1_TX_DMA_STREAM        STM32_DMA_STREAM_ID(1, 3)
+#define STM32_I2S_DMA_ERROR_HOOK(i2sp)      osalSysHalt("DMA failure")
+
+/*
+ * ICU driver system settings.
+ */
+#define STM32_ICU_USE_TIM1                  FALSE
+#define STM32_ICU_USE_TIM2                  FALSE
+#define STM32_ICU_USE_TIM3                  FALSE
+#define STM32_ICU_TIM1_IRQ_PRIORITY         3
+#define STM32_ICU_TIM2_IRQ_PRIORITY         3
+#define STM32_ICU_TIM3_IRQ_PRIORITY         3
+
+/*
+ * PWM driver system settings.
+ */
+#define STM32_PWM_USE_ADVANCED              FALSE
+#define STM32_PWM_USE_TIM1                  FALSE
+#define STM32_PWM_USE_TIM2                  FALSE
+#define STM32_PWM_USE_TIM3                  FALSE
+#define STM32_PWM_TIM1_IRQ_PRIORITY         3
+#define STM32_PWM_TIM2_IRQ_PRIORITY         3
+#define STM32_PWM_TIM3_IRQ_PRIORITY         3
+
+/*
+ * SERIAL driver system settings.
+ */
+#define STM32_SERIAL_USE_USART1             FALSE
+#define STM32_SERIAL_USE_USART2             TRUE
+#define STM32_SERIAL_USART1_PRIORITY        3
+#define STM32_SERIAL_USART2_PRIORITY        3
+
+/*
+ * SPI driver system settings.
+ */
+#define STM32_SPI_USE_SPI1                  FALSE
+#define STM32_SPI_SPI1_DMA_PRIORITY         1
+#define STM32_SPI_SPI1_IRQ_PRIORITY         2
+#define STM32_SPI_SPI1_RX_DMA_STREAM        STM32_DMA_STREAM_ID(1, 2)
+#define STM32_SPI_SPI1_TX_DMA_STREAM        STM32_DMA_STREAM_ID(1, 3)
+#define STM32_SPI_DMA_ERROR_HOOK(spip)      osalSysHalt("DMA failure")
+
+/*
+ * ST driver system settings.
+ */
+#define STM32_ST_IRQ_PRIORITY               2
+#define STM32_ST_USE_TIMER                  2
+
+/*
+ * UART driver system settings.
+ */
+#define STM32_UART_USE_USART1               FALSE
+#define STM32_UART_USE_USART2               FALSE
+#define STM32_UART_USART1_IRQ_PRIORITY      3
+#define STM32_UART_USART2_IRQ_PRIORITY      3
+#define STM32_UART_USART1_DMA_PRIORITY      0
+#define STM32_UART_USART2_DMA_PRIORITY      0
+#define STM32_UART_USART1_RX_DMA_STREAM     STM32_DMA_STREAM_ID(1, 3)
+#define STM32_UART_USART1_TX_DMA_STREAM     STM32_DMA_STREAM_ID(1, 2)
+#define STM32_UART_USART2_RX_DMA_STREAM     STM32_DMA_STREAM_ID(1, 5)
+#define STM32_UART_USART2_TX_DMA_STREAM     STM32_DMA_STREAM_ID(1, 4)
+#define STM32_UART_DMA_ERROR_HOOK(uartp)    osalSysHalt("DMA failure")
+
+/*
+ * WDG driver system settings.
+ */
+#define STM32_WDG_USE_IWDG                  FALSE
+
+/*
+ * USB driver system settings.
+ */
+#define STM32_USB_USE_USB1                  TRUE
+#define STM32_USB_LOW_POWER_ON_SUSPEND      FALSE
+#define STM32_USB_USB1_LP_IRQ_PRIORITY      3
+
+#endif /* MCUCONF_H */
diff --git a/keyboards/chavdai40/readme.md b/keyboards/chavdai40/readme.md
new file mode 100644
index 000000000..57af68d0a
--- /dev/null
+++ b/keyboards/chavdai40/readme.md
@@ -0,0 +1,19 @@
+# chavdai40
+
+![chavdai40](https://github.com/dvorak55/chavdai40/blob/master/image-ver1/impl-1.jpg)
+
+Chavdai40 is very simple decoratable 40% keyboard
+
+* Keyboard Maintainer: [t-miyajima](https://github.com/dvorak55)
+* Hardware Supported: Chavdai40 PCB rev1
+* Hardware Availability: not yet available.
+
+Make example for this keyboard (after setting up your build environment):
+
+    make chavdai40:default
+
+Flashing example for this keyboard:
+
+    make chavdai40:default:flash
+
+See the [build environment setup](https://docs.qmk.fm/#/getting_started_build_tools) and the [make instructions](https://docs.qmk.fm/#/getting_started_make_guide) for more information. Brand new to QMK? Start with our [Complete Newbs Guide](https://docs.qmk.fm/#/newbs).
diff --git a/keyboards/chavdai40/rules.mk b/keyboards/chavdai40/rules.mk
new file mode 100644
index 000000000..64c6f662a
--- /dev/null
+++ b/keyboards/chavdai40/rules.mk
@@ -0,0 +1,18 @@
+# MCU name
+MCU = STM32F042
+
+# Build Options
+#   change yes to no to disable
+BOOTMAGIC_ENABLE = lite     # Virtual DIP switch configuration
+MOUSEKEY_ENABLE = yes       # Mouse keys
+EXTRAKEY_ENABLE = yes       # Audio control and System control
+CONSOLE_ENABLE = no         # Console for debug
+COMMAND_ENABLE = no         # Commands for debug and configuration
+# Do not enable SLEEP_LED_ENABLE. it uses the same timer as BACKLIGHT_ENABLE
+SLEEP_LED_ENABLE = no       # Breathing sleep LED during USB suspend
+# if this doesn't work, see here: https://github.com/tmk/tmk_keyboard/wiki/FAQ#nkro-doesnt-work
+NKRO_ENABLE = no            # USB Nkey Rollover
+BACKLIGHT_ENABLE = no       # Enable keyboard backlight functionality
+RGBLIGHT_ENABLE = no        # Enable keyboard RGB underglow
+BLUETOOTH_ENABLE = no       # Enable Bluetooth
+AUDIO_ENABLE = no           # Audio output
\ No newline at end of file
-- 
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