From 96a249effdbef145211cebf3b8af73a0446d14e1 Mon Sep 17 00:00:00 2001
From: gdisirio <gdisirio@35acf78f-673a-0410-8e92-d51de3d6d3f4>
Date: Tue, 14 Jul 2015 09:55:18 +0000
Subject: STM32L0xx-related work.
git-svn-id: svn://svn.code.sf.net/p/chibios/svn/trunk@8093 35acf78f-673a-0410-8e92-d51de3d6d3f4
---
os/hal/ports/STM32/STM32L0xx/hal_lld.c | 221 +++++++
os/hal/ports/STM32/STM32L0xx/hal_lld.h | 979 +++++++++++++++++++++++++++++++
os/hal/ports/STM32/STM32L0xx/platform.mk | 85 +++
3 files changed, 1285 insertions(+)
create mode 100644 os/hal/ports/STM32/STM32L0xx/hal_lld.c
create mode 100644 os/hal/ports/STM32/STM32L0xx/hal_lld.h
create mode 100644 os/hal/ports/STM32/STM32L0xx/platform.mk
(limited to 'os')
diff --git a/os/hal/ports/STM32/STM32L0xx/hal_lld.c b/os/hal/ports/STM32/STM32L0xx/hal_lld.c
new file mode 100644
index 000000000..c472e11e9
--- /dev/null
+++ b/os/hal/ports/STM32/STM32L0xx/hal_lld.c
@@ -0,0 +1,221 @@
+/*
+ ChibiOS - Copyright (C) 2006..2015 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 STM32F0xx/hal_lld.c
+ * @brief STM32F0xx HAL subsystem low level driver source.
+ *
+ * @addtogroup HAL
+ * @{
+ */
+
+#include "hal.h"
+
+/*===========================================================================*/
+/* Driver local definitions. */
+/*===========================================================================*/
+
+/*===========================================================================*/
+/* Driver exported variables. */
+/*===========================================================================*/
+
+/**
+ * @brief CMSIS system core clock variable.
+ * @note It is declared in system_stm32f0xx.h.
+ */
+uint32_t SystemCoreClock = STM32_SYSCLK;
+
+/*===========================================================================*/
+/* Driver local variables and types. */
+/*===========================================================================*/
+
+/*===========================================================================*/
+/* Driver local functions. */
+/*===========================================================================*/
+
+/**
+ * @brief Initializes the backup domain.
+ * @note WARNING! Changing clock source impossible without resetting
+ * of the whole BKP domain.
+ */
+static void hal_lld_backup_domain_init(void) {
+
+ /* Backup domain access enabled and left open.*/
+ PWR->CR |= PWR_CR_DBP;
+
+ /* Reset BKP domain if different clock source selected.*/
+ if ((RCC->BDCR & STM32_RTCSEL_MASK) != STM32_RTCSEL){
+ /* Backup domain reset.*/
+ RCC->BDCR = RCC_BDCR_BDRST;
+ RCC->BDCR = 0;
+ }
+
+ /* If enabled then the LSE is started.*/
+#if STM32_LSE_ENABLED
+#if defined(STM32_LSE_BYPASS)
+ /* LSE Bypass.*/
+ RCC->BDCR |= STM32_LSEDRV | RCC_BDCR_LSEON | RCC_BDCR_LSEBYP;
+#else
+ /* No LSE Bypass.*/
+ RCC->BDCR |= STM32_LSEDRV | RCC_BDCR_LSEON;
+#endif
+ while ((RCC->BDCR & RCC_BDCR_LSERDY) == 0)
+ ; /* Waits until LSE is stable. */
+#endif
+
+#if STM32_RTCSEL != STM32_RTCSEL_NOCLOCK
+ /* If the backup domain hasn't been initialized yet then proceed with
+ initialization.*/
+ if ((RCC->BDCR & RCC_BDCR_RTCEN) == 0) {
+ /* Selects clock source.*/
+ RCC->BDCR |= STM32_RTCSEL;
+
+ /* RTC clock enabled.*/
+ RCC->BDCR |= RCC_BDCR_RTCEN;
+ }
+#endif /* STM32_RTCSEL != STM32_RTCSEL_NOCLOCK */
+}
+
+/*===========================================================================*/
+/* Driver interrupt handlers. */
+/*===========================================================================*/
+
+/*===========================================================================*/
+/* Driver exported functions. */
+/*===========================================================================*/
+
+/**
+ * @brief Low level HAL driver initialization.
+ *
+ * @notapi
+ */
+void hal_lld_init(void) {
+
+ /* Reset of all peripherals.*/
+ rccResetAHB(0xFFFFFFFF);
+ rccResetAPB1(0xFFFFFFFF);
+ rccResetAPB2(~RCC_APB2RSTR_DBGMCURST);
+
+ /* PWR clock enabled.*/
+ rccEnablePWRInterface(FALSE);
+
+ /* Initializes the backup domain.*/
+ hal_lld_backup_domain_init();
+
+#if defined(STM32_DMA_REQUIRED)
+ dmaInit();
+#endif
+
+ /* Programmable voltage detector enable.*/
+#if STM32_PVD_ENABLE
+ PWR->CR |= PWR_CR_PVDE | (STM32_PLS & STM32_PLS_MASK);
+#endif /* STM32_PVD_ENABLE */
+}
+
+/**
+ * @brief STM32 clocks and PLL initialization.
+ * @note All the involved constants come from the file @p board.h.
+ * @note This function should be invoked just after the system reset.
+ *
+ * @special
+ */
+void stm32_clock_init(void) {
+
+#if !STM32_NO_INIT
+ /* HSI setup, it enforces the reset situation in order to handle possible
+ problems with JTAG probes and re-initializations.*/
+ RCC->CR |= RCC_CR_HSION; /* Make sure HSI is ON. */
+ while (!(RCC->CR & RCC_CR_HSIRDY))
+ ; /* Wait until HSI is stable. */
+
+ /* HSI is selected as new source without touching the other fields in
+ CFGR. Clearing the register has to be postponed after HSI is the
+ new source.*/
+ RCC->CFGR &= ~RCC_CFGR_SW; /* Reset SW */
+ RCC->CFGR |= RCC_CFGR_SWS_HSI; /* Select HSI as internal*/
+ while ((RCC->CFGR & RCC_CFGR_SWS) != RCC_CFGR_SWS_HSI)
+ ; /* Wait until HSI is selected. */
+
+ /* Registers finally cleared to reset values.*/
+ RCC->CR &= RCC_CR_HSITRIM | RCC_CR_HSION; /* CR Reset value. */
+ RCC->CFGR = 0; /* CFGR reset value. */
+
+#if STM32_HSE_ENABLED
+ /* HSE activation.*/
+#if defined(STM32_HSE_BYPASS)
+ /* HSE Bypass.*/
+ RCC->CR |= RCC_CR_HSEON | RCC_CR_HSEBYP;
+#else
+ /* No HSE Bypass.*/
+ RCC->CR |= RCC_CR_HSEON;
+#endif
+ while (!(RCC->CR & RCC_CR_HSERDY))
+ ; /* Waits until HSE is stable. */
+#endif
+
+#if STM32_HSI14_ENABLED
+ /* HSI14 activation.*/
+ RCC->CR2 |= RCC_CR2_HSI14ON;
+ while (!(RCC->CR2 & RCC_CR2_HSI14RDY))
+ ; /* Waits until HSI14 is stable. */
+#endif
+
+#if STM32_HSI48_ENABLED
+ /* HSI48 activation.*/
+ RCC->CR2 |= RCC_CR2_HSI48ON;
+ while (!(RCC->CR2 & RCC_CR2_HSI48RDY))
+ ; /* Waits until HSI48 is stable. */
+#endif
+
+#if STM32_LSI_ENABLED
+ /* LSI activation.*/
+ RCC->CSR |= RCC_CSR_LSION;
+ while ((RCC->CSR & RCC_CSR_LSIRDY) == 0)
+ ; /* Waits until LSI is stable. */
+#endif
+
+ /* Clock settings.*/
+ RCC->CFGR = STM32_MCOSEL | STM32_PLLMUL | STM32_PLLSRC |
+ STM32_ADCPRE | STM32_PPRE | STM32_HPRE;
+ RCC->CFGR2 = STM32_PREDIV;
+ RCC->CFGR3 = STM32_ADCSW | STM32_USBSW | STM32_CECSW |
+ STM32_I2C1SW | STM32_USART1SW;
+
+#if STM32_ACTIVATE_PLL
+ /* PLL activation.*/
+ RCC->CR |= RCC_CR_PLLON;
+ while (!(RCC->CR & RCC_CR_PLLRDY))
+ ; /* Waits until PLL is stable. */
+#endif
+
+ /* Flash setup and final clock selection. */
+ FLASH->ACR = STM32_FLASHBITS;
+
+ /* Switching to the configured clock source if it is different from HSI.*/
+#if (STM32_SW != STM32_SW_HSI)
+ /* Switches clock source.*/
+ RCC->CFGR |= STM32_SW;
+ while ((RCC->CFGR & RCC_CFGR_SWS) != (STM32_SW << 2))
+ ; /* Waits selection complete. */
+#endif
+
+ /* SYSCFG clock enabled here because it is a multi-functional unit shared
+ among multiple drivers.*/
+ rccEnableAPB2(RCC_APB2ENR_SYSCFGEN, TRUE);
+#endif /* !STM32_NO_INIT */
+}
+
+/** @} */
diff --git a/os/hal/ports/STM32/STM32L0xx/hal_lld.h b/os/hal/ports/STM32/STM32L0xx/hal_lld.h
new file mode 100644
index 000000000..092a6b448
--- /dev/null
+++ b/os/hal/ports/STM32/STM32L0xx/hal_lld.h
@@ -0,0 +1,979 @@
+/*
+ ChibiOS - Copyright (C) 2006..2015 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 STM32L0xx/hal_lld.h
+ * @brief STM32L0xx HAL subsystem low level driver header.
+ * @pre This module requires the following macros to be defined in the
+ * @p board.h file:
+ * - STM32_LSECLK.
+ * - STM32_LSEDRV.
+ * - STM32_LSE_BYPASS (optionally).
+ * - STM32_HSECLK.
+ * - STM32_HSE_BYPASS (optionally).
+ * .
+ * One of the following macros must also be defined:
+ * - STM32L051xx, STM32L052xx, STM32L053xx,
+ * STM32L061xx, STM32L062xx, STM32L063xx for ultra-low-power MCUs.
+ * .
+ *
+ * @addtogroup HAL
+ * @{
+ */
+
+#ifndef _HAL_LLD_H_
+#define _HAL_LLD_H_
+
+/*
+ * Registry definitions.
+ */
+#include "stm32_registry.h"
+
+/*===========================================================================*/
+/* Driver constants. */
+/*===========================================================================*/
+
+/**
+ * @name Platform identification macros
+ * @{
+ */
+#if defined(STM32L051xx) || defined(__DOXYGEN__)
+#define PLATFORM_NAME "STM32L051xx ultra-low-power MCU"
+
+#elif defined(STM32L052xx)
+#define PLATFORM_NAME "STM32L052xx ultra-low-power MCU"
+
+#elif defined(STM32L053xx)
+#define PLATFORM_NAME "STM32L053xx ultra-low-power MCU"
+
+#elif defined(STM32L061xx)
+#define PLATFORM_NAME "STM32L061xx ultra-low-power MCU"
+
+#elif defined(STM32L062xx)
+#define PLATFORM_NAME "STM32L062xx ultra-low-power MCU"
+
+#elif defined(STM32L063xx)
+#define PLATFORM_NAME "STM32L063xx ultra-low-power MCU"
+
+#else
+#error "STM32L0xx device not specified"
+#endif
+/** @} */
+
+/**
+ * @name Absolute Maximum Ratings
+ * @{
+ */
+/**
+ * @brief Maximum system clock frequency.
+ */
+#define STM32_SYSCLK_MAX 32000000
+
+/**
+ * @brief Maximum HSE clock frequency.
+ */
+#define STM32_HSECLK_MAX 24000000
+
+/**
+ * @brief Minimum HSE clock frequency.
+ */
+#define STM32_HSECLK_MIN 2000000
+
+/**
+ * @brief Maximum LSE clock frequency.
+ */
+#define STM32_LSECLK_MAX 1000000
+
+/**
+ * @brief Minimum LSE clock frequency.
+ */
+#define STM32_LSECLK_MIN 1000
+
+/**
+ * @brief Maximum PLLs input clock frequency.
+ */
+#define STM32_PLLIN_MAX 24000000
+
+/**
+ * @brief Minimum PLLs input clock frequency.
+ */
+#define STM32_PLLIN_MIN 2000000
+
+/**
+ * @brief Maximum PLL output clock frequency.
+ */
+#define STM32_PLLOUT_MAX 32000000
+
+/**
+ * @brief Minimum PLL output clock frequency.
+ */
+#define STM32_PLLOUT_MIN 2000000
+
+/**
+ * @brief Maximum APB clock frequency.
+ */
+#define STM32_PCLK1_MAX 32000000
+
+/**
+ * @brief Maximum APB clock frequency.
+ */
+#define STM32_PCLK2_MAX 32000000
+/** @} */
+
+/**
+ * @name Internal clock sources
+ * @{
+ */
+#define STM32_HSI16CLK 16000000 /**< 16MHz internal clock. */
+#define STM32_HSI48CLK 48000000 /**< 48MHz internal clock. */
+#define STM32_LSICLK 38000 /**< Low speed internal clock. */
+/** @} */
+
+/**
+ * @name PWR_CR register bits definitions
+ * @{
+ */
+#define STM32_PLS_MASK (7 << 5) /**< PLS field mask. */
+#define STM32_PLS_LEV0 (0 << 5) /**< PVD level 0. */
+#define STM32_PLS_LEV1 (1 << 5) /**< PVD level 1. */
+#define STM32_PLS_LEV2 (2 << 5) /**< PVD level 2. */
+#define STM32_PLS_LEV3 (3 << 5) /**< PVD level 3. */
+#define STM32_PLS_LEV4 (4 << 5) /**< PVD level 4. */
+#define STM32_PLS_LEV5 (5 << 5) /**< PVD level 5. */
+#define STM32_PLS_LEV6 (6 << 5) /**< PVD level 6. */
+#define STM32_PLS_EXT (7 << 5) /**< PVD level 7. */
+
+#define STM32_VOS_MASK (3 << 11) /**< VOS field mask. */
+#define STM32_VOS_RANGE1 (1 << 11) /**< VOS level 1.8 volts. */
+#define STM32_VOS_RANGE2 (2 << 11) /**< VOS level 1.5 volts. */
+#define STM32_VOS_RANGE3 (3 << 11) /**< VOS level 1.2 volts. */
+/** @} */
+
+/**
+ * @name RCC_CR register bits definitions
+ * @{
+ */
+#define STM32_RTCPRE_MASK (3 << 29) /**< RTCPRE mask. */
+#define STM32_RTCPRE_DIV2 (0 << 29) /**< HSE divided by 2. */
+#define STM32_RTCPRE_DIV4 (1 << 29) /**< HSE divided by 4. */
+#define STM32_RTCPRE_DIV8 (2 << 29) /**< HSE divided by 2. */
+#define STM32_RTCPRE_DIV16 (3 << 29) /**< HSE divided by 16. */
+/** @} */
+
+/**
+ * @name RCC_CFGR register bits definitions
+ * @{
+ */
+#define STM32_SW_MASK (3 << 0) /**< SW field mask. */
+#define STM32_SW_MSI (0 << 0) /**< SYSCLK source is MSI. */
+#define STM32_SW_HSI16 (1 << 0) /**< SYSCLK source is HSI16 */
+#define STM32_SW_HSE (2 << 0) /**< SYSCLK source is HSE. */
+#define STM32_SW_PLL (3 << 0) /**< SYSCLK source is PLL. */
+
+#define STM32_HPRE_MASK (15 << 4) /**< HPRE field mask. */
+#define STM32_HPRE_DIV1 (0 << 4) /**< SYSCLK divided by 1. */
+#define STM32_HPRE_DIV2 (8 << 4) /**< SYSCLK divided by 2. */
+#define STM32_HPRE_DIV4 (9 << 4) /**< SYSCLK divided by 4. */
+#define STM32_HPRE_DIV8 (10 << 4) /**< SYSCLK divided by 8. */
+#define STM32_HPRE_DIV16 (11 << 4) /**< SYSCLK divided by 16. */
+#define STM32_HPRE_DIV64 (12 << 4) /**< SYSCLK divided by 64. */
+#define STM32_HPRE_DIV128 (13 << 4) /**< SYSCLK divided by 128. */
+#define STM32_HPRE_DIV256 (14 << 4) /**< SYSCLK divided by 256. */
+#define STM32_HPRE_DIV512 (15 << 4) /**< SYSCLK divided by 512. */
+
+#define STM32_PPRE1_MASK (7 << 8) /**< PPRE2 field mask. */
+#define STM32_PPRE1_DIV1 (0 << 8) /**< HCLK divided by 1. */
+#define STM32_PPRE1_DIV2 (4 << 8) /**< HCLK divided by 2. */
+#define STM32_PPRE1_DIV4 (5 << 8) /**< HCLK divided by 4. */
+#define STM32_PPRE1_DIV8 (6 << 8) /**< HCLK divided by 8. */
+#define STM32_PPRE1_DIV16 (7 << 8) /**< HCLK divided by 16. */
+
+#define STM32_PPRE2_MASK (7 << 12) /**< PPRE2 field mask. */
+#define STM32_PPRE2_DIV1 (0 << 12) /**< HCLK divided by 1. */
+#define STM32_PPRE2_DIV2 (4 << 12) /**< HCLK divided by 2. */
+#define STM32_PPRE2_DIV4 (5 << 12) /**< HCLK divided by 4. */
+#define STM32_PPRE2_DIV8 (6 << 12) /**< HCLK divided by 8. */
+#define STM32_PPRE2_DIV16 (7 << 12) /**< HCLK divided by 16. */
+
+#define STM32_STOPWUCK_MASK (1 << 15) /**< PLLDIV field mask. */
+#define STM32_STOPWUCK_MSI (0 << 15) /**< MSI is wakeup clock. */
+#define STM32_STOPWUCK_HSI16 (1 << 15) /**< HSI16 is wakeup clock. */
+
+#define STM32_PLLSRC_MASK (1 << 16) /**< PLLSRC field mask. */
+#define STM32_PLLSRC_HSI16 (0 << 16) /**< PLL clock source is HSI16. */
+#define STM32_PLLSRC_HSE (1 << 16) /**< PLL clock source is HSE. */
+
+#define STM32_PLLMUL_MASK (15 << 18) /**< PLLMUL field mask. */
+#define STM32_PLLMUL_MUL3 (0 << 18) /**< PLL multiplier is 3. */
+#define STM32_PLLMUL_MUL4 (1 << 18) /**< PLL multiplier is 4. */
+#define STM32_PLLMUL_MUL6 (2 << 18) /**< PLL multiplier is 6. */
+#define STM32_PLLMUL_MUL8 (3 << 18) /**< PLL multiplier is 8. */
+#define STM32_PLLMUL_MUL12 (4 << 18) /**< PLL multiplier is 12. */
+#define STM32_PLLMUL_MUL16 (5 << 18) /**< PLL multiplier is 16. */
+#define STM32_PLLMUL_MUL24 (6 << 18) /**< PLL multiplier is 24. */
+#define STM32_PLLMUL_MUL32 (7 << 18) /**< PLL multiplier is 32. */
+#define STM32_PLLMUL_MUL48 (8 << 18) /**< PLL multiplier is 48. */
+
+#define STM32_PLLDIV_MASK (3 << 22) /**< PLLDIV field mask. */
+#define STM32_PLLDIV_DIV2 (1 << 22) /**< PLL divided by 2. */
+#define STM32_PLLDIV_DIV3 (2 << 22) /**< PLL divided by 3. */
+#define STM32_PLLDIV_DIV4 (3 << 22) /**< PLL divided by 4. */
+
+#define STM32_MCOSEL_MASK (15 << 24) /**< MCOSEL field mask. */
+#define STM32_MCOSEL_NOCLOCK (0 << 24) /**< No clock on MCO pin. */
+#define STM32_MCOSEL_SYSCLK (1 << 24) /**< SYSCLK on MCO pin. */
+#define STM32_MCOSEL_HSI16 (2 << 24) /**< HSI16 clock on MCO pin. */
+#define STM32_MCOSEL_MSI (3 << 24) /**< MSI clock on MCO pin. */
+#define STM32_MCOSEL_HSE (4 << 24) /**< HSE clock on MCO pin. */
+#define STM32_MCOSEL_PLL (5 << 24) /**< PLL clock on MCO pin. */
+#define STM32_MCOSEL_LSI (6 << 24) /**< LSI clock on MCO pin. */
+#define STM32_MCOSEL_LSE (7 << 24) /**< LSE clock on MCO pin. */
+#define STM32_MCOSEL_HSI48 (8 << 24) /**< HSI48 clock on MCO pin. */
+
+#define STM32_MCOPRE_MASK (7 << 28) /**< MCOPRE field mask. */
+#define STM32_MCOPRE_DIV1 (0 << 28) /**< MCO is divided by 1. */
+#define STM32_MCOPRE_DIV2 (1 << 28) /**< MCO is divided by 1. */
+#define STM32_MCOPRE_DIV4 (2 << 28) /**< MCO is divided by 1. */
+#define STM32_MCOPRE_DIV8 (3 << 28) /**< MCO is divided by 1. */
+#define STM32_MCOPRE_DIV16 (4 << 28) /**< MCO is divided by 1. */
+/** @} */
+
+/**
+ * @name RCC_ICSCR register bits definitions
+ * @{
+ */
+#define STM32_MSIRANGE_MASK (7 << 13) /**< MSIRANGE field mask. */
+#define STM32_MSIRANGE_64K (0 << 13) /**< 64kHz nominal. */
+#define STM32_MSIRANGE_128K (1 << 13) /**< 128kHz nominal. */
+#define STM32_MSIRANGE_256K (2 << 13) /**< 256kHz nominal. */
+#define STM32_MSIRANGE_512K (3 << 13) /**< 512kHz nominal. */
+#define STM32_MSIRANGE_1M (4 << 13) /**< 1MHz nominal. */
+#define STM32_MSIRANGE_2M (5 << 13) /**< 2MHz nominal. */
+#define STM32_MSIRANGE_4M (6 << 13) /**< 4MHz nominal */
+/** @} */
+
+/**
+ * @name RCC_CSR register bits definitions
+ * @{
+ */
+#define STM32_RTCSEL_MASK (3 << 16) /**< RTC source mask. */
+#define STM32_RTCSEL_NOCLOCK (0 << 16) /**< No RTC source. */
+#define STM32_RTCSEL_LSE (1 << 16) /**< RTC source is LSE. */
+#define STM32_RTCSEL_LSI (2 << 16) /**< RTC source is LSI. */
+#define STM32_RTCSEL_HSEDIV (3 << 16) /**< RTC source is HSE divided. */
+/** @} */
+
+/**
+ * @name RCC_CCIPR register bits definitions
+ * @{
+ */
+#define STM32_USART1SEL_MASK (3 << 0) /**< USART1 clock source mask. */
+#define STM32_USART1SEL_APB (0 << 0) /**< USART1 clock is APB. */
+#define STM32_USART1SEL_SYSCLK (1 << 0) /**< USART1 clock is SYSCLK. */
+#define STM32_USART1SEL_HSI16 (2 << 0) /**< USART1 clock is HSI16. */
+#define STM32_USART1SEL_LSE (3 << 0) /**< USART1 clock is LSE. */
+#define STM32_USART2SEL_MASK (3 << 2) /**< USART2 clock source mask. */
+
+#define STM32_USART2SEL_APB (0 << 2) /**< USART2 clock is APB. */
+#define STM32_USART2SEL_SYSCLK (1 << 2) /**< USART2 clock is SYSCLK. */
+#define STM32_USART2SEL_HSI16 (2 << 2) /**< USART2 clock is HSI16. */
+#define STM32_USART2SEL_LSE (3 << 2) /**< USART2 clock is LSE. */
+
+#define STM32_LPUART1SEL_MASK (3 << 10) /**< LPUART1 clock source mask. */
+#define STM32_LPUART1SEL_APB (0 << 10) /**< LPUART1 clock is APB. */
+#define STM32_LPUART1SEL_SYSCLK (1 << 10) /**< LPUART1 clock is SYSCLK. */
+#define STM32_LPUART1SEL_HSI16 (2 << 10) /**< LPUART1 clock is HSI16. */
+#define STM32_LPUART1SEL_LSE (3 << 10) /**< LPUART1 clock is LSE. */
+
+#define STM32_I2C1SEL_MASK (3 << 12) /**< I2C1 clock source mask. */
+#define STM32_I2C1SEL_APB (0 << 12) /**< I2C1 clock is APB. */
+#define STM32_I2C1SEL_SYSCLK (1 << 12) /**< I2C1 clock is SYSCLK. */
+#define STM32_I2C1SEL_HSI16 (2 << 12) /**< I2C1 clock is HSI16. */
+
+#define STM32_I2C3SEL_MASK (3 << 16) /**< I2C3 clock source mask. */
+#define STM32_I2C3SEL_APB (0 << 16) /**< I2C3 clock is APB. */
+#define STM32_I2C3SEL_SYSCLK (1 << 16) /**< I2C3 clock is SYSCLK. */
+#define STM32_I2C3SEL_HSI16 (2 << 16) /**< I2C3 clock is HSI16. */
+
+#define STM32_HSI48SEL_MASK (1 << 27) /**< HSI48SEL clock source mask.*/
+#define STM32_HSI48SEL_USBPLL (0 << 27) /**< HSI48 clock is USB PLL. */
+#define STM32_HSI48SEL_RC48 (1 << 27) /**< HSI48 clock is RC28. */
+/** @} */
+
+/*===========================================================================*/
+/* Driver pre-compile time settings. */
+/*===========================================================================*/
+
+/**
+ * @name Configuration options
+ * @{
+ */
+/**
+ * @brief Disables the PWR/RCC initialization in the HAL.
+ */
+#if !defined(STM32_NO_INIT) || defined(__DOXYGEN__)
+#define STM32_NO_INIT FALSE
+#endif
+
+/**
+ * @brief Core voltage selection.
+ * @note This setting affects all the performance and clock related
+ * settings, the maximum performance is only obtainable selecting
+ * the maximum voltage.
+ */
+#if !defined(STM32_VOS) || defined(__DOXYGEN__)
+#define STM32_VOS STM32_VOS_1P8
+#endif
+
+/**
+ * @brief Enables or disables the programmable voltage detector.
+ */
+#if !defined(STM32_PVD_ENABLE) || defined(__DOXYGEN__)
+#define STM32_PVD_ENABLE FALSE
+#endif
+
+/**
+ * @brief Sets voltage level for programmable voltage detector.
+ */
+#if !defined(STM32_PLS) || defined(__DOXYGEN__)
+#define STM32_PLS STM32_PLS_LEV0
+#endif
+
+/**
+ * @brief Enables or disables the HSI clock source.
+ */
+#if !defined(STM32_HSI_ENABLED) || defined(__DOXYGEN__)
+#define STM32_HSI_ENABLED TRUE
+#endif
+
+/**
+ * @brief Enables or disables the LSI clock source.
+ */
+#if !defined(STM32_LSI_ENABLED) || defined(__DOXYGEN__)
+#define STM32_LSI_ENABLED TRUE
+#endif
+
+/**
+ * @brief Enables or disables the HSE clock source.
+ */
+#if !defined(STM32_HSE_ENABLED) || defined(__DOXYGEN__)
+#define STM32_HSE_ENABLED FALSE
+#endif
+
+/**
+ * @brief Enables or disables the LSE clock source.
+ */
+#if !defined(STM32_HSE_ENABLED) || defined(__DOXYGEN__)
+#define STM32_LSE_ENABLED FALSE
+#endif
+
+/**
+ * @brief ADC clock setting.
+ */
+#if !defined(STM32_ADC_CLOCK_ENABLED) || defined(__DOXYGEN__)
+#define STM32_ADC_CLOCK_ENABLED TRUE
+#endif
+
+/**
+ * @brief USB clock setting.
+ */
+#if !defined(STM32_USB_CLOCK_ENABLED) || defined(__DOXYGEN__)
+#define STM32_USB_CLOCK_ENABLED TRUE
+#endif
+
+/**
+ * @brief MSI frequency setting.
+ */
+#if !defined(STM32_MSIRANGE) || defined(__DOXYGEN__)
+#define STM32_MSIRANGE STM32_MSIRANGE_2M
+#endif
+
+/**
+ * @brief Main clock source selection.
+ * @note If the selected clock source is not the PLL then the PLL is not
+ * initialized and started.
+ * @note The default value is calculated for a 32MHz system clock from
+ * the internal 16MHz HSI clock.
+ */
+#if !defined(STM32_SW) || defined(__DOXYGEN__)
+#define STM32_SW STM32_SW_PLL
+#endif
+
+/**
+ * @brief Clock source for the PLL.
+ * @note This setting has only effect if the PLL is selected as the
+ * system clock source.
+ * @note The default value is calculated for a 32MHz system clock from
+ * the internal 16MHz HSI clock.
+ */
+#if !defined(STM32_PLLSRC) || defined(__DOXYGEN__)
+#define STM32_PLLSRC STM32_PLLSRC_HSI
+#endif
+
+/**
+ * @brief PLL multiplier value.
+ * @note The allowed values are 3, 4, 6, 8, 12, 16, 32, 48.
+ * @note The default value is calculated for a 32MHz system clock from
+ * the internal 16MHz HSI clock.
+ */
+#if !defined(STM32_PLLMUL_VALUE) || defined(__DOXYGEN__)
+#define STM32_PLLMUL_VALUE 6
+#endif
+
+/**
+ * @brief PLL divider value.
+ * @note The allowed values are 2, 3, 4.
+ * @note The default value is calculated for a 32MHz system clock from
+ * the internal 16MHz HSI clock.
+ */
+#if !defined(STM32_PLLDIV_VALUE) || defined(__DOXYGEN__)
+#define STM32_PLLDIV_VALUE 3
+#endif
+
+/**
+ * @brief AHB prescaler value.
+ * @note The default value is calculated for a 32MHz system clock from
+ * the internal 16MHz HSI clock.
+ */
+#if !defined(STM32_HPRE) || defined(__DOXYGEN__)
+#define STM32_HPRE STM32_HPRE_DIV1
+#endif
+
+/**
+ * @brief APB1 prescaler value.
+ */
+#if !defined(STM32_PPRE1) || defined(__DOXYGEN__)
+#define STM32_PPRE1 STM32_PPRE1_DIV1
+#endif
+
+/**
+ * @brief APB2 prescaler value.
+ */
+#if !defined(STM32_PPRE2) || defined(__DOXYGEN__)
+#define STM32_PPRE2 STM32_PPRE2_DIV1
+#endif
+
+/**
+ * @brief MCO clock source.
+ */
+#if !defined(STM32_MCOSEL) || defined(__DOXYGEN__)
+#define STM32_MCOSEL STM32_MCOSEL_NOCLOCK
+#endif
+
+/**
+ * @brief MCO divider setting.
+ */
+#if !defined(STM32_MCOPRE) || defined(__DOXYGEN__)
+#define STM32_MCOPRE STM32_MCOPRE_DIV1
+#endif
+
+/**
+ * @brief RTC/LCD clock source.
+ */
+#if !defined(STM32_RTCSEL) || defined(__DOXYGEN__)
+#define STM32_RTCSEL STM32_RTCSEL_LSE
+#endif
+
+/**
+ * @brief HSE divider toward RTC setting.
+ */
+#if !defined(STM32_RTCPRE) || defined(__DOXYGEN__)
+#define STM32_RTCPRE STM32_RTCPRE_DIV2
+#endif
+/** @} */
+
+/*===========================================================================*/
+/* Derived constants and error checks. */
+/*===========================================================================*/
+
+/*
+ * Configuration-related checks.
+ */
+#if !defined(STM32L0xx_MCUCONF)
+#error "Using a wrong mcuconf.h file, STM32L0xx_MCUCONF not defined"
+#endif
+
+/* Voltage related limits.*/
+#if (STM32_VOS == STM32_VOS_1P8) || defined(__DOXYGEN__)
+/**
+ * @brief Maximum HSE clock frequency at current voltage setting.
+ */
+#define STM32_HSECLK_MAX 32000000
+
+/**
+ * @brief Maximum SYSCLK clock frequency at current voltage setting.
+ */
+#define STM32_SYSCLK_MAX 32000000
+
+/**
+ * @brief Maximum VCO clock frequency at current voltage setting.
+ */
+#define STM32_PLLVCO_MAX 96000000
+
+/**
+ * @brief Minimum VCO clock frequency at current voltage setting.
+ */
+#define STM32_PLLVCO_MIN 6000000
+
+/**
+ * @brief Maximum APB1 clock frequency.
+ */
+#define STM32_PCLK1_MAX 32000000
+
+/**
+ * @brief Maximum APB2 clock frequency.
+ */
+#define STM32_PCLK2_MAX 32000000
+
+/**
+ * @brief Maximum frequency not requiring a wait state for flash accesses.
+ */
+#define STM32_0WS_THRESHOLD 16000000
+
+/**
+ * @brief HSI availability at current voltage settings.
+ */
+#define STM32_HSI_AVAILABLE TRUE
+
+#elif STM32_VOS == STM32_VOS_1P5
+#define STM32_HSECLK_MAX 16000000
+#define STM32_SYSCLK_MAX 16000000
+#define STM32_PLLVCO_MAX 48000000
+#define STM32_PLLVCO_MIN 6000000
+#define STM32_PCLK1_MAX 16000000
+#define STM32_PCLK2_MAX 16000000
+#define STM32_0WS_THRESHOLD 8000000
+#define STM32_HSI_AVAILABLE TRUE
+#elif STM32_VOS == STM32_VOS_1P2
+#define STM32_HSECLK_MAX 4000000
+#define STM32_SYSCLK_MAX 4000000
+#define STM32_PLLVCO_MAX 24000000
+#define STM32_PLLVCO_MIN 6000000
+#define STM32_PCLK1_MAX 4000000
+#define STM32_PCLK2_MAX 4000000
+#define STM32_0WS_THRESHOLD 2000000
+#define STM32_HSI_AVAILABLE FALSE
+#else
+#error "invalid STM32_VOS value specified"
+#endif
+
+/* HSI related checks.*/
+#if STM32_HSI_ENABLED
+#if !STM32_HSI_AVAILABLE
+ #error "impossible to activate HSI under the current voltage settings"
+#endif
+#else /* !STM32_HSI_ENABLED */
+#if STM32_ADC_CLOCK_ENABLED || \
+ (STM32_SW == STM32_SW_HSI) || \
+ ((STM32_SW == STM32_SW_PLL) && \
+ (STM32_PLLSRC == STM32_PLLSRC_HSI)) || \
+ (STM32_MCOSEL == STM32_MCOSEL_HSI) || \
+ ((STM32_MCOSEL == STM32_MCOSEL_PLL) && \
+ (STM32_PLLSRC == STM32_PLLSRC_HSI))
+#error "required HSI clock is not enabled"
+#endif
+#endif /* !STM32_HSI_ENABLED */
+
+/* HSE related checks.*/
+#if STM32_HSE_ENABLED
+#if STM32_HSECLK == 0
+#error "impossible to activate HSE"
+#endif
+#if (STM32_HSECLK < 1000000) || (STM32_HSECLK > STM32_HSECLK_MAX)
+#error "STM32_HSECLK outside acceptable range (1MHz...STM32_HSECLK_MAX)"
+#endif
+#else /* !STM32_HSE_ENABLED */
+#if (STM32_SW == STM32_SW_HSE) || \
+ ((STM32_SW == STM32_SW_PLL) && \
+ (STM32_PLLSRC == STM32_PLLSRC_HSE)) || \
+ (STM32_MCOSEL == STM32_MCOSEL_HSE) || \
+ ((STM32_MCOSEL == STM32_MCOSEL_PLL) && \
+ (STM32_PLLSRC == STM32_PLLSRC_HSE)) || \
+ (STM32_RTCSEL == STM32_RTCSEL_HSEDIV)
+#error "required HSE clock is not enabled"
+#endif
+#endif /* !STM32_HSE_ENABLED */
+
+/* LSI related checks.*/
+#if STM32_LSI_ENABLED
+#else /* !STM32_LSI_ENABLED */
+
+#if STM32_MCOSEL == STM32_MCOSEL_LSI
+#error "LSI not enabled, required by STM32_MCOSEL"
+#endif
+
+#if STM32_RTCSEL == STM32_RTCSEL_LSI
+#error "LSI not enabled, required by STM32_RTCSEL"
+#endif
+
+#endif /* !STM32_LSI_ENABLED */
+
+/* LSE related checks.*/
+#if STM32_LSE_ENABLED
+#if (STM32_LSECLK == 0)
+#error "impossible to activate LSE"
+#endif
+#if (STM32_LSECLK < 1000) || (STM32_LSECLK > 1000000)
+#error "STM32_LSECLK outside acceptable range (1...1000kHz)"
+#endif
+#else /* !STM32_LSE_ENABLED */
+
+#if STM32_MCOSEL == STM32_MCOSEL_LSE
+#error "LSE not enabled, required by STM32_MCOSEL"
+#endif
+
+#if STM32_RTCSEL == STM32_RTCSEL_LSE
+#error "LSE not enabled, required by STM32_RTCSEL"
+#endif
+
+#endif /* !STM32_LSE_ENABLED */
+
+/* PLL related checks.*/
+#if STM32_USB_CLOCK_ENABLED || \
+ (STM32_SW == STM32_SW_PLL) || \
+ (STM32_MCOSEL == STM32_MCOSEL_PLL) || \
+ defined(__DOXYGEN__)
+/**
+ * @brief PLL activation flag.
+ */
+#define STM32_ACTIVATE_PLL TRUE
+#else
+#define STM32_ACTIVATE_PLL FALSE
+#endif
+
+/**
+ * @brief PLLMUL field.
+ */
+#if (STM32_PLLMUL_VALUE == 3) || defined(__DOXYGEN__)
+#define STM32_PLLMUL (0 << 18)
+#elif STM32_PLLMUL_VALUE == 4
+#define STM32_PLLMUL (1 << 18)
+#elif STM32_PLLMUL_VALUE == 6
+#define STM32_PLLMUL (2 << 18)
+#elif STM32_PLLMUL_VALUE == 8
+#define STM32_PLLMUL (3 << 18)
+#elif STM32_PLLMUL_VALUE == 12
+#define STM32_PLLMUL (4 << 18)
+#elif STM32_PLLMUL_VALUE == 16
+#define STM32_PLLMUL (5 << 18)
+#elif STM32_PLLMUL_VALUE == 24
+#define STM32_PLLMUL (6 << 18)
+#elif STM32_PLLMUL_VALUE == 32
+#define STM32_PLLMUL (7 << 18)
+#elif STM32_PLLMUL_VALUE == 48
+#define STM32_PLLMUL (8 << 18)
+#else
+#error "invalid STM32_PLLMUL_VALUE value specified"
+#endif
+
+/**
+ * @brief PLLDIV field.
+ */
+#if (STM32_PLLDIV_VALUE == 2) || defined(__DOXYGEN__)
+#define STM32_PLLDIV (1 << 22)
+#elif STM32_PLLDIV_VALUE == 3
+#define STM32_PLLDIV (2 << 22)
+#elif STM32_PLLDIV_VALUE == 4
+#define STM32_PLLDIV (3 << 22)
+#else
+#error "invalid STM32_PLLDIV_VALUE value specified"
+#endif
+
+/**
+ * @brief PLL input clock frequency.
+ */
+#if (STM32_PLLSRC == STM32_PLLSRC_HSE) || defined(__DOXYGEN__)
+#define STM32_PLLCLKIN STM32_HSECLK
+#elif STM32_PLLSRC == STM32_PLLSRC_HSI
+#define STM32_PLLCLKIN STM32_HSICLK
+#else
+#error "invalid STM32_PLLSRC value specified"
+#endif
+
+/* PLL input frequency range check.*/
+#if (STM32_PLLCLKIN < 2000000) || (STM32_PLLCLKIN > 24000000)
+#error "STM32_PLLCLKIN outside acceptable range (2...24MHz)"
+#endif
+
+/**
+ * @brief PLL VCO frequency.
+ */
+#define STM32_PLLVCO (STM32_PLLCLKIN * STM32_PLLMUL_VALUE)
+
+/* PLL output frequency range check.*/
+#if (STM32_PLLVCO < STM32_PLLVCO_MIN) || (STM32_PLLVCO > STM32_PLLVCO_MAX)
+#error "STM32_PLLVCO outside acceptable range (STM32_PLLVCO_MIN...STM32_PLLVCO_MAX)"
+#endif
+
+/**
+ * @brief PLL output clock frequency.
+ */
+#define STM32_PLLCLKOUT (STM32_PLLVCO / STM32_PLLDIV_VALUE)
+
+/* PLL output frequency range check.*/
+#if (STM32_PLLCLKOUT < 2000000) || (STM32_PLLCLKOUT > 32000000)
+#error "STM32_PLLCLKOUT outside acceptable range (2...32MHz)"
+#endif
+
+/**
+ * @brief MSI frequency.
+ * @note Values are taken from the STM8Lxx datasheet.
+ */
+#if STM32_MSIRANGE == STM32_MSIRANGE_64K
+#define STM32_MSICLK 65500
+#elif STM32_MSIRANGE == STM32_MSIRANGE_128K
+#define STM32_MSICLK 131000
+#elif STM32_MSIRANGE == STM32_MSIRANGE_256K
+#define STM32_MSICLK 262000
+#elif STM32_MSIRANGE == STM32_MSIRANGE_512K
+#define STM32_MSICLK 524000
+#elif STM32_MSIRANGE == STM32_MSIRANGE_1M
+#define STM32_MSICLK 1050000
+#elif STM32_MSIRANGE == STM32_MSIRANGE_2M
+#define STM32_MSICLK 2100000
+#elif STM32_MSIRANGE == STM32_MSIRANGE_4M
+#define STM32_MSICLK 4200000
+#else
+#error "invalid STM32_MSIRANGE value specified"
+#endif
+
+/**
+ * @brief System clock source.
+ */
+#if STM32_NO_INIT || defined(__DOXYGEN__)
+#define STM32_SYSCLK 2100000
+#elif (STM32_SW == STM32_SW_MSI)
+#define STM32_SYSCLK STM32_MSICLK
+#elif (STM32_SW == STM32_SW_HSI)
+#define STM32_SYSCLK STM32_HSICLK
+#elif (STM32_SW == STM32_SW_HSE)
+#define STM32_SYSCLK STM32_HSECLK
+#elif (STM32_SW == STM32_SW_PLL)
+#define STM32_SYSCLK STM32_PLLCLKOUT
+#else
+#error "invalid STM32_SW value specified"
+#endif
+
+/* Check on the system clock.*/
+#if STM32_SYSCLK > STM32_SYSCLK_MAX
+#error "STM32_SYSCLK above maximum rated frequency (STM32_SYSCLK_MAX)"
+#endif
+
+/**
+ * @brief AHB frequency.
+ */
+#if (STM32_HPRE == STM32_HPRE_DIV1) || defined(__DOXYGEN__)
+#define STM32_HCLK (STM32_SYSCLK / 1)
+#elif STM32_HPRE == STM32_HPRE_DIV2
+#define STM32_HCLK (STM32_SYSCLK / 2)
+#elif STM32_HPRE == STM32_HPRE_DIV4
+#define STM32_HCLK (STM32_SYSCLK / 4)
+#elif STM32_HPRE == STM32_HPRE_DIV8
+#define STM32_HCLK (STM32_SYSCLK / 8)
+#elif STM32_HPRE == STM32_HPRE_DIV16
+#define STM32_HCLK (STM32_SYSCLK / 16)
+#elif STM32_HPRE == STM32_HPRE_DIV64
+#define STM32_HCLK (STM32_SYSCLK / 64)
+#elif STM32_HPRE == STM32_HPRE_DIV128
+#define STM32_HCLK (STM32_SYSCLK / 128)
+#elif STM32_HPRE == STM32_HPRE_DIV256
+#define STM32_HCLK (STM32_SYSCLK / 256)
+#elif STM32_HPRE == STM32_HPRE_DIV512
+#define STM32_HCLK (STM32_SYSCLK / 512)
+#else
+#error "invalid STM32_HPRE value specified"
+#endif
+
+/* AHB frequency check.*/
+#if STM32_HCLK > STM32_SYSCLK_MAX
+#error "STM32_HCLK exceeding maximum frequency (STM32_SYSCLK_MAX)"
+#endif
+
+/**
+ * @brief APB1 frequency.
+ */
+#if (STM32_PPRE1 == STM32_PPRE1_DIV1) || defined(__DOXYGEN__)
+#define STM32_PCLK1 (STM32_HCLK / 1)
+#elif STM32_PPRE1 == STM32_PPRE1_DIV2
+#define STM32_PCLK1 (STM32_HCLK / 2)
+#elif STM32_PPRE1 == STM32_PPRE1_DIV4
+#define STM32_PCLK1 (STM32_HCLK / 4)
+#elif STM32_PPRE1 == STM32_PPRE1_DIV8
+#define STM32_PCLK1 (STM32_HCLK / 8)
+#elif STM32_PPRE1 == STM32_PPRE1_DIV16
+#define STM32_PCLK1 (STM32_HCLK / 16)
+#else
+#error "invalid STM32_PPRE1 value specified"
+#endif
+
+/* APB1 frequency check.*/
+#if STM32_PCLK1 > STM32_PCLK1_MAX
+#error "STM32_PCLK1 exceeding maximum frequency (STM32_PCLK1_MAX)"
+#endif
+
+/**
+ * @brief APB2 frequency.
+ */
+#if (STM32_PPRE2 == STM32_PPRE2_DIV1) || defined(__DOXYGEN__)
+#define STM32_PCLK2 (STM32_HCLK / 1)
+#elif STM32_PPRE2 == STM32_PPRE2_DIV2
+#define STM32_PCLK2 (STM32_HCLK / 2)
+#elif STM32_PPRE2 == STM32_PPRE2_DIV4
+#define STM32_PCLK2 (STM32_HCLK / 4)
+#elif STM32_PPRE2 == STM32_PPRE2_DIV8
+#define STM32_PCLK2 (STM32_HCLK / 8)
+#elif STM32_PPRE2 == STM32_PPRE2_DIV16
+#define STM32_PCLK2 (STM32_HCLK / 16)
+#else
+#error "invalid STM32_PPRE2 value specified"
+#endif
+
+/* APB2 frequency check.*/
+#if STM32_PCLK2 > STM32_PCLK2_MAX
+#error "STM32_PCLK2 exceeding maximum frequency (STM32_PCLK2_MAX)"
+#endif
+
+/**
+ * @brief MCO divider clock.
+ */
+#if (STM32_MCOSEL == STM32_MCOSEL_NOCLOCK) || defined(__DOXYGEN__)
+#define STM32_MCODIVCLK 0
+#elif STM32_MCOSEL == STM32_MCOSEL_HSI
+#define STM32_MCODIVCLK STM32_HSICLK
+#elif STM32_MCOSEL == STM32_MCOSEL_MSI
+#define STM32_MCODIVCLK STM32_MSICLK
+#elif STM32_MCOSEL == STM32_MCOSEL_HSE
+#define STM32_MCODIVCLK STM32_HSECLK
+#elif STM32_MCOSEL == STM32_MCOSEL_PLL
+#define STM32_MCODIVCLK STM32_PLLCLKOUT
+#elif STM32_MCOSEL == STM32_MCOSEL_LSI
+#define STM32_MCODIVCLK STM32_LSICLK
+#elif STM32_MCOSEL == STM32_MCOSEL_LSE
+#define STM32_MCODIVCLK STM32_LSECLK
+#else
+#error "invalid STM32_MCOSEL value specified"
+#endif
+
+/**
+ * @brief MCO output pin clock.
+ */
+#if (STM32_MCOPRE == STM32_MCOPRE_DIV1) || defined(__DOXYGEN__)
+#define STM32_MCOCLK STM32_MCODIVCLK
+#elif STM32_MCOPRE == STM32_MCOPRE_DIV2
+#define STM32_MCOCLK (STM32_MCODIVCLK / 2)
+#elif STM32_MCOPRE == STM32_MCOPRE_DIV4
+#define STM32_MCOCLK (STM32_MCODIVCLK / 4)
+#elif STM32_MCOPRE == STM32_MCOPRE_DIV8
+#define STM32_MCOCLK (STM32_MCODIVCLK / 8)
+#elif STM32_MCOPRE == STM32_MCOPRE_DIV16
+#define STM32_MCOCLK (STM32_MCODIVCLK / 16)
+#else
+#error "invalid STM32_MCOPRE value specified"
+#endif
+
+/**
+ * @brief HSE divider toward RTC clock.
+ */
+#if (STM32_RTCPRE == STM32_RTCPRE_DIV2) || defined(__DOXYGEN__)
+#define STM32_HSEDIVCLK (STM32_HSECLK / 2)
+#elif (STM32_RTCPRE == STM32_RTCPRE_DIV4) || defined(__DOXYGEN__)
+#define STM32_HSEDIVCLK (STM32_HSECLK / 4)
+#elif (STM32_RTCPRE == STM32_RTCPRE_DIV8) || defined(__DOXYGEN__)
+#define STM32_HSEDIVCLK (STM32_HSECLK / 8)
+#elif (STM32_RTCPRE == STM32_RTCPRE_DIV16) || defined(__DOXYGEN__)
+#define STM32_HSEDIVCLK (STM32_HSECLK / 16)
+#else
+#error "invalid STM32_RTCPRE value specified"
+#endif
+
+/**
+ * @brief RTC/LCD clock.
+ */
+#if (STM32_RTCSEL == STM32_RTCSEL_NOCLOCK) || defined(__DOXYGEN__)
+#define STM32_RTCCLK 0
+#elif STM32_RTCSEL == STM32_RTCSEL_LSE
+#define STM32_RTCCLK STM32_LSECLK
+#elif STM32_RTCSEL == STM32_RTCSEL_LSI
+#define STM32_RTCCLK STM32_LSICLK
+#elif STM32_RTCSEL == STM32_RTCSEL_HSEDIV
+#define STM32_RTCCLK STM32_HSEDIVCLK
+#else
+#error "invalid STM32_RTCSEL value specified"
+#endif
+
+/**
+ * @brief USB frequency.
+ */
+#define STM32_USBCLK (STM32_PLLVCO / 2)
+
+/**
+ * @brief Timers 2, 3, 4, 6, 7 clock.
+ */
+#if (STM32_PPRE1 == STM32_PPRE1_DIV1) || defined(__DOXYGEN__)
+#define STM32_TIMCLK1 (STM32_PCLK1 * 1)
+#else
+#define STM32_TIMCLK1 (STM32_PCLK1 * 2)
+#endif
+
+/**
+ * @brief Timers 9, 10, 11 clock.
+ */
+#if (STM32_PPRE2 == STM32_PPRE2_DIV1) || defined(__DOXYGEN__)
+#define STM32_TIMCLK2 (STM32_PCLK2 * 1)
+#else
+#define STM32_TIMCLK2 (STM32_PCLK2 * 2)
+#endif
+
+/**
+ * @brief Flash settings.
+ */
+#if (STM32_HCLK <= STM32_0WS_THRESHOLD) || defined(__DOXYGEN__)
+#define STM32_FLASHBITS1 0x00000000
+#else
+#define STM32_FLASHBITS1 0x00000004
+#define STM32_FLASHBITS2 0x00000007
+#endif
+
+/*===========================================================================*/
+/* Driver data structures and types. */
+/*===========================================================================*/
+
+/*===========================================================================*/
+/* Driver macros. */
+/*===========================================================================*/
+
+/*===========================================================================*/
+/* External declarations. */
+/*===========================================================================*/
+
+/* Various helpers.*/
+#include "nvic.h"
+#include "stm32_isr.h"
+#include "stm32_dma.h"
+#include "stm32_rcc.h"
+
+#ifdef __cplusplus
+extern "C" {
+#endif
+ void hal_lld_init(void);
+ void stm32_clock_init(void);
+#ifdef __cplusplus
+}
+#endif
+
+#endif /* _HAL_LLD_H_ */
+
+/** @} */
diff --git a/os/hal/ports/STM32/STM32L0xx/platform.mk b/os/hal/ports/STM32/STM32L0xx/platform.mk
new file mode 100644
index 000000000..0e24b00e9
--- /dev/null
+++ b/os/hal/ports/STM32/STM32L0xx/platform.mk
@@ -0,0 +1,85 @@
+# List of all the STM32L0xx platform files.
+ifeq ($(USE_SMART_BUILD),yes)
+HALCONF := $(strip $(shell cat halconf.h | egrep -e "define"))
+
+PLATFORMSRC := $(CHIBIOS)/os/hal/ports/common/ARMCMx/nvic.c \
+ $(CHIBIOS)/os/hal/ports/STM32/STM32L0xx/stm32_dma.c \
+ $(CHIBIOS)/os/hal/ports/STM32/STM32L0xx/hal_lld.c \
+ $(CHIBIOS)/os/hal/ports/STM32/LLD/TIMv1/st_lld.c
+ifneq ($(findstring HAL_USE_ADC TRUE,$(HALCONF)),)
+PLATFORMSRC += $(CHIBIOS)/os/hal/ports/STM32/STM32L0xx/adc_lld.c
+endif
+ifneq ($(findstring HAL_USE_EXT TRUE,$(HALCONF)),)
+PLATFORMSRC += $(CHIBIOS)/os/hal/ports/STM32/STM32L0xx/ext_lld_isr.c \
+ $(CHIBIOS)/os/hal/ports/STM32/LLD/ext_lld.c
+endif
+ifneq ($(findstring HAL_USE_CAN TRUE,$(HALCONF)),)
+PLATFORMSRC += $(CHIBIOS)/os/hal/ports/STM32/LLD/can_lld.c
+endif
+ifneq ($(findstring HAL_USE_DAC TRUE,$(HALCONF)),)
+PLATFORMSRC += $(CHIBIOS)/os/hal/ports/STM32/LLD/DACv1/dac_lld.c
+endif
+ifneq ($(findstring HAL_USE_PAL TRUE,$(HALCONF)),)
+PLATFORMSRC += $(CHIBIOS)/os/hal/ports/STM32/LLD/GPIOv2/pal_lld.c
+endif
+ifneq ($(findstring HAL_USE_I2C TRUE,$(HALCONF)),)
+PLATFORMSRC += $(CHIBIOS)/os/hal/ports/STM32/LLD/I2Cv2/i2c_lld.c
+endif
+ifneq ($(findstring HAL_USE_RTC TRUE,$(HALCONF)),)
+PLATFORMSRC += $(CHIBIOS)/os/hal/ports/STM32/LLD/RTCv2/rtc_lld.c
+endif
+ifneq ($(findstring HAL_USE_SPI TRUE,$(HALCONF)),)
+PLATFORMSRC += $(CHIBIOS)/os/hal/ports/STM32/LLD/SPIv2/spi_lld.c
+endif
+ifneq ($(findstring HAL_USE_GPT TRUE,$(HALCONF)),)
+PLATFORMSRC += $(CHIBIOS)/os/hal/ports/STM32/LLD/TIMv1/gpt_lld.c
+endif
+ifneq ($(findstring HAL_USE_ICU TRUE,$(HALCONF)),)
+PLATFORMSRC += $(CHIBIOS)/os/hal/ports/STM32/LLD/TIMv1/icu_lld.c
+endif
+ifneq ($(findstring HAL_USE_PWM TRUE,$(HALCONF)),)
+PLATFORMSRC += $(CHIBIOS)/os/hal/ports/STM32/LLD/TIMv1/pwm_lld.c
+endif
+ifneq ($(findstring HAL_USE_SERIAL TRUE,$(HALCONF)),)
+PLATFORMSRC += $(CHIBIOS)/os/hal/ports/STM32/LLD/USARTv2/serial_lld.c
+endif
+ifneq ($(findstring HAL_USE_UART TRUE,$(HALCONF)),)
+PLATFORMSRC += $(CHIBIOS)/os/hal/ports/STM32/LLD/USARTv2/uart_lld.c
+endif
+ifneq ($(findstring HAL_USE_USB TRUE,$(HALCONF)),)
+PLATFORMSRC += $(CHIBIOS)/os/hal/ports/STM32/LLD/USBv1/usb_lld.c
+endif
+else
+PLATFORMSRC := $(CHIBIOS)/os/hal/ports/common/ARMCMx/nvic.c \
+ $(CHIBIOS)/os/hal/ports/STM32/STM32L0xx/stm32_dma.c \
+ $(CHIBIOS)/os/hal/ports/STM32/STM32L0xx/hal_lld.c \
+ $(CHIBIOS)/os/hal/ports/STM32/STM32L0xx/adc_lld.c \
+ $(CHIBIOS)/os/hal/ports/STM32/STM32L0xx/ext_lld_isr.c \
+ $(CHIBIOS)/os/hal/ports/STM32/LLD/can_lld.c \
+ $(CHIBIOS)/os/hal/ports/STM32/LLD/ext_lld.c \
+ $(CHIBIOS)/os/hal/ports/STM32/LLD/DACv1/dac_lld.c \
+ $(CHIBIOS)/os/hal/ports/STM32/LLD/GPIOv2/pal_lld.c \
+ $(CHIBIOS)/os/hal/ports/STM32/LLD/I2Cv2/i2c_lld.c \
+ $(CHIBIOS)/os/hal/ports/STM32/LLD/RTCv2/rtc_lld.c \
+ $(CHIBIOS)/os/hal/ports/STM32/LLD/SPIv2/spi_lld.c \
+ $(CHIBIOS)/os/hal/ports/STM32/LLD/TIMv1/gpt_lld.c \
+ $(CHIBIOS)/os/hal/ports/STM32/LLD/TIMv1/icu_lld.c \
+ $(CHIBIOS)/os/hal/ports/STM32/LLD/TIMv1/pwm_lld.c \
+ $(CHIBIOS)/os/hal/ports/STM32/LLD/TIMv1/st_lld.c \
+ $(CHIBIOS)/os/hal/ports/STM32/LLD/USARTv2/serial_lld.c \
+ $(CHIBIOS)/os/hal/ports/STM32/LLD/USARTv2/uart_lld.c \
+ $(CHIBIOS)/os/hal/ports/STM32/LLD/USBv1/usb_lld.c
+endif
+
+# Required include directories
+PLATFORMINC := $(CHIBIOS)/os/hal/ports/common/ARMCMx \
+ $(CHIBIOS)/os/hal/ports/STM32/STM32L0xx \
+ $(CHIBIOS)/os/hal/ports/STM32/LLD \
+ $(CHIBIOS)/os/hal/ports/STM32/LLD/DACv1 \
+ $(CHIBIOS)/os/hal/ports/STM32/LLD/GPIOv2 \
+ $(CHIBIOS)/os/hal/ports/STM32/LLD/I2Cv2 \
+ $(CHIBIOS)/os/hal/ports/STM32/LLD/RTCv2 \
+ $(CHIBIOS)/os/hal/ports/STM32/LLD/SPIv2 \
+ $(CHIBIOS)/os/hal/ports/STM32/LLD/TIMv1 \
+ $(CHIBIOS)/os/hal/ports/STM32/LLD/USARTv2 \
+ $(CHIBIOS)/os/hal/ports/STM32/LLD/USBv1
--
cgit v1.2.3