diff options
Diffstat (limited to 'platforms/chibios/drivers/ws2812_pwm.c')
| -rw-r--r-- | platforms/chibios/drivers/ws2812_pwm.c | 396 |
1 files changed, 0 insertions, 396 deletions
diff --git a/platforms/chibios/drivers/ws2812_pwm.c b/platforms/chibios/drivers/ws2812_pwm.c deleted file mode 100644 index cfee547a82..0000000000 --- a/platforms/chibios/drivers/ws2812_pwm.c +++ /dev/null @@ -1,396 +0,0 @@ -#include "ws2812.h" -#include "gpio.h" -#include "chibios_config.h" - -/* Adapted from https://github.com/joewa/WS2812-LED-Driver_ChibiOS/ */ - -#ifdef RGBW -# define WS2812_CHANNELS 4 -#else -# define WS2812_CHANNELS 3 -#endif - -#ifndef WS2812_PWM_DRIVER -# define WS2812_PWM_DRIVER PWMD2 // TIMx -#endif -#ifndef WS2812_PWM_CHANNEL -# define WS2812_PWM_CHANNEL 2 // Channel -#endif -#ifndef WS2812_PWM_PAL_MODE -# define WS2812_PWM_PAL_MODE 2 // DI Pin's alternate function value -#endif -#ifndef WS2812_DMA_STREAM -# define WS2812_DMA_STREAM STM32_DMA1_STREAM2 // DMA Stream for TIMx_UP -#endif -#ifndef WS2812_DMA_CHANNEL -# define WS2812_DMA_CHANNEL 2 // DMA Channel for TIMx_UP -#endif -#if (STM32_DMA_SUPPORTS_DMAMUX == TRUE) && !defined(WS2812_DMAMUX_ID) -# error "please consult your MCU's datasheet and specify in your config.h: #define WS2812_DMAMUX_ID STM32_DMAMUX1_TIM?_UP" -#endif - -/* Summarize https://www.st.com/resource/en/application_note/an4013-stm32-crossseries-timer-overview-stmicroelectronics.pdf to - * figure out if we are using a 32bit timer. This is needed to setup the DMA controller correctly. - * Ignore STM32H7XX and STM32U5XX as they are not supported by ChibiOS. - */ -#if !defined(STM32F1XX) && !defined(STM32L0XX) && !defined(STM32L1XX) -# define WS2812_PWM_TIMER_32BIT_PWMD2 1 -#endif -#if !defined(STM32F1XX) -# define WS2812_PWM_TIMER_32BIT_PWMD5 1 -#endif -#define WS2812_CONCAT1(a, b) a##b -#define WS2812_CONCAT(a, b) WS2812_CONCAT1(a, b) -#if WS2812_CONCAT(WS2812_PWM_TIMER_32BIT_, WS2812_PWM_DRIVER) -# define WS2812_PWM_TIMER_32BIT -#endif - -#ifndef WS2812_PWM_COMPLEMENTARY_OUTPUT -# define WS2812_PWM_OUTPUT_MODE PWM_OUTPUT_ACTIVE_HIGH -#else -# if !STM32_PWM_USE_ADVANCED -# error "WS2812_PWM_COMPLEMENTARY_OUTPUT requires STM32_PWM_USE_ADVANCED == TRUE" -# endif -# define WS2812_PWM_OUTPUT_MODE PWM_COMPLEMENTARY_OUTPUT_ACTIVE_HIGH -#endif - -// Push Pull or Open Drain Configuration -// Default Push Pull -#ifndef WS2812_EXTERNAL_PULLUP -# if defined(USE_GPIOV1) -# define WS2812_OUTPUT_MODE PAL_MODE_ALTERNATE_PUSHPULL -# else -# define WS2812_OUTPUT_MODE PAL_MODE_ALTERNATE(WS2812_PWM_PAL_MODE) | PAL_OUTPUT_TYPE_PUSHPULL | PAL_OUTPUT_SPEED_HIGHEST | PAL_PUPDR_FLOATING -# endif -#else -# if defined(USE_GPIOV1) -# define WS2812_OUTPUT_MODE PAL_MODE_ALTERNATE_OPENDRAIN -# else -# define WS2812_OUTPUT_MODE PAL_MODE_ALTERNATE(WS2812_PWM_PAL_MODE) | PAL_OUTPUT_TYPE_OPENDRAIN | PAL_OUTPUT_SPEED_HIGHEST | PAL_PUPDR_FLOATING -# endif -#endif - -#ifndef WS2812_PWM_TARGET_PERIOD -//# define WS2812_PWM_TARGET_PERIOD 800000 // Original code is 800k...? -# define WS2812_PWM_TARGET_PERIOD 80000 // TODO: work out why 10x less on f303/f4x1 -#endif - -/* --- PRIVATE CONSTANTS ---------------------------------------------------- */ - -#define WS2812_PWM_FREQUENCY (CPU_CLOCK / 2) /**< Clock frequency of PWM, must be valid with respect to system clock! */ -#define WS2812_PWM_PERIOD (WS2812_PWM_FREQUENCY / WS2812_PWM_TARGET_PERIOD) /**< 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 is defined in WS2812_TRST_US. - * Calculate the number of zeroes to add at the end assuming 1.25 uS/bit: - */ -#define WS2812_COLOR_BITS (WS2812_CHANNELS * 8) -#define WS2812_RESET_BIT_N (1000 * WS2812_TRST_US / WS2812_TIMING) -#define WS2812_COLOR_BIT_N (WS2812_LED_COUNT * WS2812_COLOR_BITS) /**< 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 / 350)) -#if (WS2812_DUTYCYCLE_0 > 255) -# error WS2812 PWM driver: High period for a 0 is more than a byte -#endif - -/** - * @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 / 800)) -#if (WS2812_DUTYCYCLE_1 > 255) -# error WS2812 PWM driver: High period for a 1 is more than a byte -#endif - -/* --- PRIVATE MACROS ------------------------------------------------------- */ - -/** - * @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_COUNT) - * @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) (WS2812_COLOR_BITS * (led) + 8 * (byte) + (7 - (bit))) - -#if (WS2812_BYTE_ORDER == WS2812_BYTE_ORDER_GRB) -/** - * @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_COUNT) - * @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 red byte is the first byte in the color packet - * - * @param[in] led: The led index [0, @ref WS2812_LED_COUNT) - * @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 red byte is the last byte in the color packet - * - * @param[in] led: The led index [0, @ref WS2812_LED_COUNT) - * @param[in] bit: The bit index [0, 7] - * - * @return The bit index - */ -# define WS2812_BLUE_BIT(led, bit) WS2812_BIT((led), 2, (bit)) - -#elif (WS2812_BYTE_ORDER == WS2812_BYTE_ORDER_RGB) -/** - * @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_COUNT) - * @param[in] bit: The bit number [0, 7] - * - * @return The bit index - */ -# define WS2812_RED_BIT(led, bit) WS2812_BIT((led), 0, (bit)) - -/** - * @brief Determine the index in @ref ws2812_frame_buffer "the frame buffer" of a given green bit - * - * @note The red byte is the first byte in the color packet - * - * @param[in] led: The led index [0, @ref WS2812_LED_COUNT) - * @param[in] bit: The bit number [0, 7] - * - * @return The bit index - */ -# define WS2812_GREEN_BIT(led, bit) WS2812_BIT((led), 1, (bit)) - -/** - * @brief Determine the index in @ref ws2812_frame_buffer "the frame buffer" of a given blue bit - * - * @note The red byte is the last byte in the color packet - * - * @param[in] led: The led index [0, @ref WS2812_LED_COUNT) - * @param[in] bit: The bit index [0, 7] - * - * @return The bit index - */ -# define WS2812_BLUE_BIT(led, bit) WS2812_BIT((led), 2, (bit)) - -#elif (WS2812_BYTE_ORDER == WS2812_BYTE_ORDER_BGR) -/** - * @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_COUNT) - * @param[in] bit: The bit number [0, 7] - * - * @return The bit index - */ -# define WS2812_RED_BIT(led, bit) WS2812_BIT((led), 2, (bit)) - -/** - * @brief Determine the index in @ref ws2812_frame_buffer "the frame buffer" of a given green bit - * - * @note The red byte is the first byte in the color packet - * - * @param[in] led: The led index [0, @ref WS2812_LED_COUNT) - * @param[in] bit: The bit number [0, 7] - * - * @return The bit index - */ -# define WS2812_GREEN_BIT(led, bit) WS2812_BIT((led), 1, (bit)) - -/** - * @brief Determine the index in @ref ws2812_frame_buffer "the frame buffer" of a given blue bit - * - * @note The red byte is the last byte in the color packet - * - * @param[in] led: The led index [0, @ref WS2812_LED_COUNT) - * @param[in] bit: The bit index [0, 7] - * - * @return The bit index - */ -# define WS2812_BLUE_BIT(led, bit) WS2812_BIT((led), 0, (bit)) -#endif - -#ifdef RGBW -/** - * @brief Determine the index in @ref ws2812_frame_buffer "the frame buffer" of a given white bit - * - * @note The white 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_WHITE_BIT(led, bit) WS2812_BIT((led), 3, (bit)) -#endif - -/* --- PRIVATE VARIABLES ---------------------------------------------------- */ - -// STM32F2XX, STM32F4XX and STM32F7XX do NOT zero pad DMA transfers of unequal data width. Buffer width must match TIMx CCR. -// For all other STM32 DMA transfer will automatically zero pad. We only need to set the right peripheral width. -#if defined(STM32F2XX) || defined(STM32F4XX) || defined(STM32F7XX) -# if defined(WS2812_PWM_TIMER_32BIT) -# define WS2812_DMA_MEMORY_WIDTH STM32_DMA_CR_MSIZE_WORD -# define WS2812_DMA_PERIPHERAL_WIDTH STM32_DMA_CR_PSIZE_WORD -typedef uint32_t ws2812_buffer_t; -# else -# define WS2812_DMA_MEMORY_WIDTH STM32_DMA_CR_MSIZE_HWORD -# define WS2812_DMA_PERIPHERAL_WIDTH STM32_DMA_CR_PSIZE_HWORD -typedef uint16_t ws2812_buffer_t; -# endif -#else -# define WS2812_DMA_MEMORY_WIDTH STM32_DMA_CR_MSIZE_BYTE -# if defined(WS2812_PWM_TIMER_32BIT) -# define WS2812_DMA_PERIPHERAL_WIDTH STM32_DMA_CR_PSIZE_WORD -# else -# define WS2812_DMA_PERIPHERAL_WIDTH STM32_DMA_CR_PSIZE_HWORD -# endif -typedef uint8_t ws2812_buffer_t; -#endif - -static ws2812_buffer_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 - - palSetLineMode(WS2812_DI_PIN, WS2812_OUTPUT_MODE); - - // 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_PWM_CHANNEL - 1] = {.mode = WS2812_PWM_OUTPUT_MODE, .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 -#if defined(WB32F3G71xx) || defined(WB32FQ95xx) - dmaStreamAlloc(WS2812_DMA_STREAM - WB32_DMA_STREAM(0), 10, NULL, NULL); - dmaStreamSetSource(WS2812_DMA_STREAM, ws2812_frame_buffer); - dmaStreamSetDestination(WS2812_DMA_STREAM, &(WS2812_PWM_DRIVER.tim->CCR[WS2812_PWM_CHANNEL - 1])); // Ziel ist der An-Zeit im Cap-Comp-Register - dmaStreamSetMode(WS2812_DMA_STREAM, WB32_DMA_CHCFG_HWHIF(WS2812_DMA_CHANNEL) | WB32_DMA_CHCFG_DIR_M2P | WB32_DMA_CHCFG_PSIZE_WORD | WB32_DMA_CHCFG_MSIZE_WORD | WB32_DMA_CHCFG_MINC | WB32_DMA_CHCFG_CIRC | WB32_DMA_CHCFG_TCIE | WB32_DMA_CHCFG_PL(3)); -#else - dmaStreamAlloc(WS2812_DMA_STREAM - STM32_DMA_STREAM(0), 10, NULL, NULL); - dmaStreamSetPeripheral(WS2812_DMA_STREAM, &(WS2812_PWM_DRIVER.tim->CCR[WS2812_PWM_CHANNEL - 1])); // Ziel ist der An-Zeit im Cap-Comp-Register - dmaStreamSetMemory0(WS2812_DMA_STREAM, ws2812_frame_buffer); - dmaStreamSetMode(WS2812_DMA_STREAM, STM32_DMA_CR_CHSEL(WS2812_DMA_CHANNEL) | STM32_DMA_CR_DIR_M2P | WS2812_DMA_PERIPHERAL_WIDTH | WS2812_DMA_MEMORY_WIDTH | STM32_DMA_CR_MINC | STM32_DMA_CR_CIRC | STM32_DMA_CR_PL(3)); -#endif - dmaStreamSetTransactionSize(WS2812_DMA_STREAM, WS2812_BIT_N); - // M2P: Memory 2 Periph; PL: Priority Level - -#if (STM32_DMA_SUPPORTS_DMAMUX == TRUE) - // If the MCU has a DMAMUX we need to assign the correct resource - dmaSetRequestSource(WS2812_DMA_STREAM, WS2812_DMAMUX_ID); -#endif - - // 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_PWM_DRIVER, &ws2812_pwm_config); - pwmEnableChannel(&WS2812_PWM_DRIVER, WS2812_PWM_CHANNEL - 1, 0); // Initial period is 0; output will be low until first duty cycle is DMA'd in -} - -void ws2812_write_led(uint16_t led_number, uint8_t r, uint8_t g, uint8_t b) { - // Write color to frame buffer - for (uint8_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; - } -} -void ws2812_write_led_rgbw(uint16_t led_number, uint8_t r, uint8_t g, uint8_t b, uint8_t w) { - // Write color to frame buffer - for (uint8_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; -#ifdef RGBW - ws2812_frame_buffer[WS2812_WHITE_BIT(led_number, bit)] = ((w >> bit) & 0x01) ? WS2812_DUTYCYCLE_1 : WS2812_DUTYCYCLE_0; -#endif - } -} - -// Setleds for standard RGB -void ws2812_setleds(LED_TYPE* ledarray, uint16_t leds) { - static bool s_init = false; - if (!s_init) { - ws2812_init(); - s_init = true; - } - - for (uint16_t i = 0; i < leds; i++) { -#ifdef RGBW - ws2812_write_led_rgbw(i, ledarray[i].r, ledarray[i].g, ledarray[i].b, ledarray[i].w); -#else - ws2812_write_led(i, ledarray[i].r, ledarray[i].g, ledarray[i].b); -#endif - } -} |