diff options
Diffstat (limited to 'platforms/chibios/drivers/ws2812_pwm.c')
| -rw-r--r-- | platforms/chibios/drivers/ws2812_pwm.c | 48 |
1 files changed, 40 insertions, 8 deletions
diff --git a/platforms/chibios/drivers/ws2812_pwm.c b/platforms/chibios/drivers/ws2812_pwm.c index e6af55b6b3..c17b9cd4e5 100644 --- a/platforms/chibios/drivers/ws2812_pwm.c +++ b/platforms/chibios/drivers/ws2812_pwm.c @@ -5,7 +5,9 @@ /* Adapted from https://github.com/joewa/WS2812-LED-Driver_ChibiOS/ */ #ifdef RGBW -# error "RGBW not supported" +# define WS2812_CHANNELS 4 +#else +# define WS2812_CHANNELS 3 #endif #ifndef WS2812_PWM_DRIVER @@ -40,15 +42,15 @@ // Default Push Pull #ifndef WS2812_EXTERNAL_PULLUP # if defined(USE_GPIOV1) -# define WS2812_OUTPUT_MODE PAL_MODE_STM32_ALTERNATE_PUSHPULL +# define WS2812_OUTPUT_MODE PAL_MODE_ALTERNATE_PUSHPULL # else -# define WS2812_OUTPUT_MODE PAL_MODE_ALTERNATE(WS2812_PWM_PAL_MODE) | PAL_STM32_OTYPE_PUSHPULL | PAL_STM32_OSPEED_HIGHEST | PAL_STM32_PUPDR_FLOATING +# 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_STM32_ALTERNATE_OPENDRAIN +# define WS2812_OUTPUT_MODE PAL_MODE_ALTERNATE_OPENDRAIN # else -# define WS2812_OUTPUT_MODE PAL_MODE_ALTERNATE(WS2812_PWM_PAL_MODE) | PAL_STM32_OTYPE_OPENDRAIN | PAL_STM32_OSPEED_HIGHEST | PAL_STM32_PUPDR_FLOATING +# define WS2812_OUTPUT_MODE PAL_MODE_ALTERNATE(WS2812_PWM_PAL_MODE) | PAL_OUTPUT_TYPE_OPENDRAIN | PAL_OUTPUT_SPEED_HIGHEST | PAL_PUPDR_FLOATING # endif #endif @@ -59,7 +61,7 @@ /* --- PRIVATE CONSTANTS ---------------------------------------------------- */ -#define WS2812_PWM_FREQUENCY (STM32_SYSCLK / 2) /**< Clock frequency of PWM, must be valid with respect to system clock! */ +#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) */ /** @@ -68,8 +70,9 @@ * 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 / 1250) -#define WS2812_COLOR_BIT_N (RGBLED_NUM * 24) /**< Number of data bits */ +#define WS2812_COLOR_BIT_N (RGBLED_NUM * 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 */ /** @@ -114,7 +117,7 @@ * * @return The bit index */ -#define WS2812_BIT(led, byte, bit) (24 * (led) + 8 * (byte) + (7 - (bit))) +#define WS2812_BIT(led, byte, bit) (WS2812_COLOR_BITS * (led) + 8 * (byte) + (7 - (bit))) #if (WS2812_BYTE_ORDER == WS2812_BYTE_ORDER_GRB) /** @@ -228,6 +231,20 @@ # 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 ---------------------------------------------------- */ static uint32_t ws2812_frame_buffer[WS2812_BIT_N + 1]; /**< Buffer for a frame */ @@ -296,6 +313,17 @@ void ws2812_write_led(uint16_t led_number, uint8_t r, uint8_t g, uint8_t b) { 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) { @@ -306,6 +334,10 @@ void ws2812_setleds(LED_TYPE* ledarray, uint16_t leds) { } 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 } } |