mkbd65/vial-qmk
Watch
1
0
Fork
You've already forked vial-qmk
 0
Code Issues Pull requests Projects Releases Packages Wiki Activity Actions

remove DMA from ws2812

Browse source
This commit is contained in:
sekigon-gonnoc 2022-01-30 10:48:50 +09:00 • committed by Ilya Zhuravlev
commit 2328012e48
1 changed files with 9 additions and 19 deletions
Download patch file Download diff file Expand all files Collapse all files

28
platforms/pico/drivers/ws2812.c
View file

@ -11,11 +11,9 @@
#include "boards/pico_boards.h"
#include "pico/stdlib.h"
#include "hardware/dma.h"
static PIO pio = pio0;
static int sm = 0;
static int dma_ch = 1;
static PIO pio = pio0;
static int sm = 0;
static int ws2812_init(void) {
sm = pio_manager_get_empty_sm(pio);
@ -32,15 +30,6 @@ static int ws2812_init(void) {
ws2812_program_init(pio, sm, offset, RGB_DI_PIN, 800000, false);
dma_channel_config conf = dma_channel_get_default_config(dma_ch);
channel_config_set_read_increment(&conf, true);
channel_config_set_write_increment(&conf, false);
channel_config_set_transfer_data_size(&conf, DMA_SIZE_32);
channel_config_set_dreq(&conf, pio_get_dreq(pio, sm, true));
dma_channel_set_config(dma_ch, &conf, false);
dma_channel_set_write_addr(dma_ch, &pio->txf[sm], false);
return 0;
}
@ -54,13 +43,14 @@ void ws2812_setleds(LED_TYPE *ledarray, uint16_t number_of_leds) {
}
}
uint32_t leddata[RGBLED_NUM];
__interrupt_disable__();
for (int i = 0; i < number_of_leds; i++) {
leddata[i] = (((uint32_t)ledarray[i].g) << 24) |
(((uint32_t)ledarray[i].r) << 16) |
((uint32_t)ledarray[i].b << 8);
pio_sm_put_blocking(pio, sm,
(((uint32_t)ledarray[i].r) << 16) |
(((uint32_t)ledarray[i].g) << 24) |
((uint32_t)ledarray[i].b << 8));
}
dma_channel_transfer_from_buffer_now(dma_ch, leddata, number_of_leds);
dma_channel_wait_for_finish_blocking(dma_ch);
__interrupt_enable__(NULL);
}