From 1d65fbb3cb6c0b1cb82b332d408308bff610e9a0 Mon Sep 17 00:00:00 2001 From: EndlessFork Date: Wed, 5 Apr 2017 11:05:47 +0200 Subject: [PATCH] WS2812: Block after ws2812_dma_start until finished --- src/ws2812/ws2812.c | 7 ++++++- 1 file changed, 6 insertions(+), 1 deletion(-) diff --git a/src/ws2812/ws2812.c b/src/ws2812/ws2812.c index 96a655a..622165a 100644 --- a/src/ws2812/ws2812.c +++ b/src/ws2812/ws2812.c @@ -77,7 +77,7 @@ static volatile uint_fast16_t current_led_offset; static volatile uint_fast16_t current_data_pause_len; static volatile uint_fast16_t current_leds; -#define DMA_LEDS_PER_HALFBUFF 9 +#define DMA_LEDS_PER_HALFBUFF 1 #define DATA_LEN(n) ((n) * WS2812_BIT_PER_LED) // number of total bytes to transfer data #define PAUSE_LEN (WS2812_PAUSE_LEN) // number of total bytes to transfer pause #define DMA_BUF_LEN (2 * DMA_LEDS_PER_HALFBUFF * WS2812_BIT_PER_LED) // DMA buffer length: 2 LEDs @@ -382,6 +382,11 @@ ws2812_refresh (uint_fast16_t n_leds) ws2812_setup_dma_buf (0); ws2812_setup_dma_buf (1); ws2812_dma_start(); + + while (ws2812_dma_status != 0) + { + ; // wait until DMA transfer is ready + } } /*----------------------------------------------------------------------------------------------------------------------------------------------- -- 2.7.4