adding noah keyboard (#7432)

* adding noah keyboard

* Update keyboards/matrix/noah/config.h

Co-Authored-By: Drashna Jaelre <drashna@live.com>

* Update keyboards/matrix/noah/noah.c

Co-Authored-By: Drashna Jaelre <drashna@live.com>

1 files changed, 272 insertions, 0 deletions

diff --git a/keyboards/matrix/noah/ws2812_f4.c b/keyboards/matrix/noah/ws2812_f4.c
new file mode 100644
index 000000000..7536d6d8c
--- /dev/null
+++ b/keyboards/matrix/noah/ws2812_f4.c
@@ -0,0 +1,272 @@
+/**
+ * @file    ws2812.c
+ * @author  Austin Glaser <austin.glaser@gmail.com>, Joerg Wangemann <joerg.wangemann@gmail.com>
+ * @brief   WS2812 LED driver
+ *
+ * Copyright (C) 2016 Austin Glaser, 2017 Joerg Wangemann
+ *
+ * This software may be modified and distributed under the terms
+ * of the MIT license.  See the LICENSE file for details.
+ *
+ * @todo    Put in names and descriptions of variables which need to be defined to use this file
+ *
+ * @addtogroup WS2812
+ * @{
+ */
+
+/* --- PRIVATE DEPENDENCIES ------------------------------------------------- */
+
+// This Driver
+#include "ws2812_f4.h"
+
+// Standard
+#include <stdint.h>
+
+// ChibiOS
+#include "ch.h"
+#include "hal.h"
+
+#include "wait.h"
+// Application
+//#include "board.h"
+
+// TODO: Add these #define's to the headers of your project.
+// Pin, timer and dma are all connected, check them all if you change one.
+// Tested with STM32F4, working at 144 or 168 MHz.
+//#define WS2812_LED_N    2 // Number of LEDs
+//#define PORT_WS2812     GPIOB
+//#define PIN_WS2812      9
+//#define WS2812_TIM_N    4  // timer, 1-11
+//#define WS2812_TIM_CH   3  // timer channel, 0-3
+//#define WS2812_DMA_STREAM STM32_DMA1_STREAM2  // DMA stream for TIMx_UP (look up in reference manual under DMA Channel selection)
+//#define WS2812_DMA_CHANNEL 6                  // DMA channel for TIMx_UP
+// The WS2812 expects 5V signal level (or at least 0.7 * VDD). Sometimes it works
+// with a 3V signal level, otherwise the easiest way to get the signal level to 5V
+// is to add an external pullup resistor from the DI pin to 5V (10k will do) and
+// configure the pin as open drain.
+// (An SMD resistor is easily solders on the connections of a light strip)
+// Uncomment the next line if an external pullup resistor is used.
+//#define WS2812_EXTERNAL_PULLUP
+
+/* --- CONFIGURATION CHECK -------------------------------------------------- */
+
+#if !defined(WS2812_LED_N)
+    #error WS2812 LED chain length not specified
+#elif WS2812_LED_N <= 0
+    #error WS2812 LED chain length set to invalid value
+#endif
+
+#if !defined(WS2812_TIM_N)
+    #error WS2812 timer not specified
+#endif
+#if defined(STM32F2XX) || defined(STM32F4XX) || defined(STM32F7XX)
+    #if WS2812_TIM_N <= 2
+        #define WS2812_AF 1
+    #elif WS2812_TIM_N <= 5
+        #define WS2812_AF 2
+    #elif WS2812_TIM_N <= 11
+        #define WS2812_AF 3
+    #endif
+#elif !defined(WS2812_AF)
+    #error WS2812_AF timer alternate function not specified
+#endif
+
+#if !defined(WS2812_TIM_CH)
+    #error WS2812 timer channel not specified
+#elif WS2812_TIM_CH >= 4
+    #error WS2812 timer channel set to invalid value
+#endif
+
+/* --- PRIVATE CONSTANTS ---------------------------------------------------- */
+
+#define WS2812_PWM_FREQUENCY    (STM32_SYSCLK/2)                /**< Clock frequency of PWM, must be valid with respect to system clock! */
+#define WS2812_PWM_PERIOD       (WS2812_PWM_FREQUENCY/800000)   /**< Clock period in ticks. 1 / 800kHz = 1.25 uS (as per datasheet) */
+
+/**
+ * @brief   Number of bit-periods to hold the data line low at the end of a frame
+ *
+ * The reset period for each frame must be at least 50 uS; so we add in 50 bit-times
+ * of zeroes at the end. (50 bits)*(1.25 uS/bit) = 62.5 uS, which gives us some
+ * slack in the timing requirements
+ */
+#define WS2812_RESET_BIT_N      (50)
+#define WS2812_COLOR_BIT_N      (WS2812_LED_N*24)                           /**< Number of data bits */
+#define WS2812_BIT_N            (WS2812_COLOR_BIT_N + WS2812_RESET_BIT_N)   /**< Total number of bits in a frame */
+
+/**
+ * @brief   High period for a zero, in ticks
+ *
+ * Per the datasheet:
+ * WS2812:
+ * - T0H: 200 nS to 500 nS, inclusive
+ * - T0L: 650 nS to 950 nS, inclusive
+ * WS2812B:
+ * - T0H: 200 nS to 500 nS, inclusive
+ * - T0L: 750 nS to 1050 nS, inclusive
+ *
+ * The duty cycle is calculated for a high period of 350 nS.
+ */
+#define WS2812_DUTYCYCLE_0      (WS2812_PWM_FREQUENCY/(1000000000/450))
+
+/**
+ * @brief   High period for a one, in ticks
+ *
+ * Per the datasheet:
+ * WS2812:
+ * - T1H: 550 nS to 850 nS, inclusive
+ * - T1L: 450 nS to 750 nS, inclusive
+ * WS2812B:
+ * - T1H: 750 nS to 1050 nS, inclusive
+ * - T1L: 200 nS to 500 nS, inclusive
+ *
+ * The duty cycle is calculated for a high period of 800 nS.
+ * This is in the middle of the specifications of the WS2812 and WS2812B.
+ */
+#define WS2812_DUTYCYCLE_1      (WS2812_PWM_FREQUENCY/(1000000000/900))
+
+/* --- PRIVATE MACROS ------------------------------------------------------- */
+
+/**
+ * @brief   Generates a reference to a numbered PWM driver
+ *
+ * @param[in] n:            The driver (timer) number
+ *
+ * @return                  A reference to the driver
+ */
+#define PWMD(n)                             CONCAT_EXPANDED_SYMBOLS(PWMD, n)
+
+#define WS2812_PWMD                         PWMD(WS2812_TIM_N)      /**< The PWM driver to use for the LED chain */
+
+/**
+ * @brief   Determine the index in @ref ws2812_frame_buffer "the frame buffer" of a given bit
+ *
+ * @param[in] led:                  The led index [0, @ref WS2812_LED_N)
+ * @param[in] byte:                 The byte number [0, 2]
+ * @param[in] bit:                  The bit number [0, 7]
+ *
+ * @return                          The bit index
+ */
+#define WS2812_BIT(led, byte, bit)          (24*(led) + 8*(byte) + (7 - (bit)))
+
+/**
+ * @brief   Determine the index in @ref ws2812_frame_buffer "the frame buffer" of a given red bit
+ *
+ * @note    The red byte is the middle byte in the color packet
+ *
+ * @param[in] led:                  The led index [0, @ref WS2812_LED_N)
+ * @param[in] bit:                  The bit number [0, 7]
+ *
+ * @return                          The bit index
+ */
+#define WS2812_RED_BIT(led, bit)            WS2812_BIT((led), 1, (bit))
+
+/**
+ * @brief   Determine the index in @ref ws2812_frame_buffer "the frame buffer" of a given green bit
+ *
+ * @note    The green byte is the first byte in the color packet
+ *
+ * @param[in] led:                  The led index [0, @ref WS2812_LED_N)
+ * @param[in] bit:                  The bit number [0, 7]
+ *
+ * @return                          The bit index
+ */
+#define WS2812_GREEN_BIT(led, bit)          WS2812_BIT((led), 0, (bit))
+
+/**
+ * @brief   Determine the index in @ref ws2812_frame_buffer "the frame buffer" of a given blue bit
+ *
+ * @note    The blue byte is the last byte in the color packet
+ *
+ * @param[in] led:                  The led index [0, @ref WS2812_LED_N)
+ * @param[in] bit:                  The bit index [0, 7]
+ *
+ * @return                          The bit index
+ */
+#define WS2812_BLUE_BIT(led, bit)           WS2812_BIT((led), 2, (bit))
+
+/* --- PRIVATE VARIABLES ---------------------------------------------------- */
+
+static uint32_t ws2812_frame_buffer[WS2812_BIT_N + 1];                             /**< Buffer for a frame */
+
+/* --- PUBLIC FUNCTIONS ----------------------------------------------------- */
+/*
+ * Gedanke: Double-buffer type transactions: double buffer transfers using two memory pointers for
+the memory (while the DMA is reading/writing from/to a buffer, the application can
+write/read to/from the other buffer).
+ */
+
+void ws2812_init(void)
+{
+    // Initialize led frame buffer
+    uint32_t i;
+    for (i = 0; i < WS2812_COLOR_BIT_N; i++) ws2812_frame_buffer[i]                       = WS2812_DUTYCYCLE_0;   // All color bits are zero duty cycle
+    for (i = 0; i < WS2812_RESET_BIT_N; i++) ws2812_frame_buffer[i + WS2812_COLOR_BIT_N]  = 0;                    // All reset bits are zero
+    // Configure pin as AF output. If there's an external pull up resistor the signal level is brought to 5V using open drain mode.
+#ifdef WS2812_EXTERNAL_PULLUP
+    palSetPadMode(PORT_WS2812, PIN_WS2812, PAL_MODE_ALTERNATE(WS2812_AF) | PAL_STM32_OTYPE_OPENDRAIN);
+#else
+    palSetPadMode(PORT_WS2812, PIN_WS2812, PAL_MODE_ALTERNATE(WS2812_AF) | PAL_STM32_OTYPE_PUSHPULL); //PAL_MODE_STM32_ALTERNATE_PUSHPULL);
+#endif
+    //palClearPad(PORT_WS2812, PIN_WS2812);
+    //wait_ms(1);
+    // PWM Configuration
+    #pragma GCC diagnostic ignored "-Woverride-init"                                        // Turn off override-init warning for this struct. We use the overriding ability to set a "default" channel config
+    static const PWMConfig ws2812_pwm_config = {
+        .frequency          = WS2812_PWM_FREQUENCY,
+        .period             = WS2812_PWM_PERIOD, //Mit dieser Periode wird UDE-Event erzeugt und ein neuer Wert (Länge WS2812_BIT_N) vom DMA ins CCR geschrieben
+        .callback           = NULL,
+        .channels = {
+            [0 ... 3]       = {.mode = PWM_OUTPUT_DISABLED,     .callback = NULL},          // Channels default to disabled
+            [WS2812_TIM_CH] = {.mode = PWM_OUTPUT_ACTIVE_HIGH,  .callback = NULL},          // Turn on the channel we care about
+        },
+        .cr2                = 0,
+        .dier               = TIM_DIER_UDE,                                                 // DMA on update event for next period
+    };
+    #pragma GCC diagnostic pop                                                              // Restore command-line warning options
+
+    // Configure DMA
+    //dmaInit(); // Joe added this
+    dmaStreamAllocate(WS2812_DMA_STREAM, 10, NULL, NULL);
+    dmaStreamSetPeripheral(WS2812_DMA_STREAM, &(WS2812_PWMD.tim->CCR[WS2812_TIM_CH]));  // Ziel ist der An-Zeit im Cap-Comp-Register
+    dmaStreamSetMemory0(WS2812_DMA_STREAM, ws2812_frame_buffer);
+    dmaStreamSetTransactionSize(WS2812_DMA_STREAM, WS2812_BIT_N);
+    dmaStreamSetMode(WS2812_DMA_STREAM,
+      STM32_DMA_CR_CHSEL(WS2812_DMA_CHANNEL) | STM32_DMA_CR_DIR_M2P | STM32_DMA_CR_PSIZE_WORD | STM32_DMA_CR_MSIZE_WORD |
+      STM32_DMA_CR_MINC | STM32_DMA_CR_CIRC | STM32_DMA_CR_PL(3));
+    // M2P: Memory 2 Periph; PL: Priority Level
+
+    // Start DMA
+    dmaStreamEnable(WS2812_DMA_STREAM);
+
+    // Configure PWM
+    // NOTE: It's required that preload be enabled on the timer channel CCR register. This is currently enabled in the
+    // ChibiOS driver code, so we don't have to do anything special to the timer. If we did, we'd have to start the timer,
+    // disable counting, enable the channel, and then make whatever configuration changes we need.
+    pwmStart(&WS2812_PWMD, &ws2812_pwm_config);
+    pwmEnableChannel(&WS2812_PWMD, WS2812_TIM_CH, 0);     // Initial period is 0; output will be low until first duty cycle is DMA'd in
+}
+
+ws2812_err_t ws2812_write_led(uint32_t led_number, uint8_t r, uint8_t g, uint8_t b)
+{
+    // Check for valid LED
+    if (led_number > WS2812_LED_N) return WS2812_LED_INVALID;
+
+    // Write color to frame buffer
+    for (uint32_t bit = 0; bit < 8; bit++) {
+        ws2812_frame_buffer[WS2812_RED_BIT(led_number, bit)]      = ((r >> bit) & 0x01) ? WS2812_DUTYCYCLE_1 : WS2812_DUTYCYCLE_0;
+        ws2812_frame_buffer[WS2812_GREEN_BIT(led_number, bit)]    = ((g >> bit) & 0x01) ? WS2812_DUTYCYCLE_1 : WS2812_DUTYCYCLE_0;
+        ws2812_frame_buffer[WS2812_BLUE_BIT(led_number, bit)]     = ((b >> bit) & 0x01) ? WS2812_DUTYCYCLE_1 : WS2812_DUTYCYCLE_0;
+    }
+
+    // Success
+    return WS2812_SUCCESS;
+}
+
+void ws2812_setleds(LED_TYPE *ledarray, uint16_t number_of_leds)
+{
+    for(int i = 0; i < number_of_leds; i++) {
+        ws2812_write_led(i, ledarray[i].r, ledarray[i].g, ledarray[i].b);
+    }
+}
+
+/** @} addtogroup WS2812 */