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authorNick Brassel <nick@tzarc.org>2020-07-16 16:39:49 +1000
committerDrashna Jael're <drashna@live.com>2020-09-30 02:59:52 -0700
commit6a5700b31acafb69d4abed0806b753dda6feac70 (patch)
tree6fb44c583473505c35448949cf4928e68abb2b50 /drivers/chibios
parent8c38482ebd1594988a3c3797b73cc534dca9a447 (diff)
Add support for DMAMUX-capable MCU configuration with WS2812 PWM driver. (#9471)
Diffstat (limited to 'drivers/chibios')
-rw-r--r--drivers/chibios/ws2812_pwm.c8
1 files changed, 8 insertions, 0 deletions
diff --git a/drivers/chibios/ws2812_pwm.c b/drivers/chibios/ws2812_pwm.c
index 7113db11e0..d93fa24735 100644
--- a/drivers/chibios/ws2812_pwm.c
+++ b/drivers/chibios/ws2812_pwm.c
@@ -23,6 +23,9 @@
#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
// Push Pull or Open Drain Configuration
// Default Push Pull
@@ -184,6 +187,11 @@ void ws2812_init(void) {
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
+#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);