73 lines
1.3 KiB
C
73 lines
1.3 KiB
C
/*
|
|
* ws2812.c
|
|
*
|
|
* Created on: Mar 25, 2026
|
|
* Author: ewars
|
|
*/
|
|
|
|
#include <ws2812_drv.h>
|
|
#include "stm32f1xx_hal.h"
|
|
|
|
extern htim2;
|
|
|
|
static void set_byte(uint32_t pos, uint8_t value);
|
|
|
|
uint8_t pwm_reset[RESET_LEN] = {0};
|
|
uint8_t pwm_full = 90;
|
|
|
|
uint8_t ledStripBuffer[RESET_LEN + LED_N * 24 + 1] = {0};
|
|
|
|
void ws2812_Init(void){
|
|
|
|
for(uint32_t i = 0; i < LED_N * 24; i++){
|
|
ledStripBuffer[RESET_LEN + i] = PWM_ONE;
|
|
}
|
|
|
|
ledStripBuffer[RESET_LEN + LED_N * 24] = pwm_full;
|
|
|
|
ws2812_update();
|
|
|
|
}
|
|
|
|
void ws2812_update(void){
|
|
HAL_TIM_PWM_Start_DMA(&htim2, TIM_CHANNEL_1, ledStripBuffer, sizeof(ledStripBuffer));
|
|
}
|
|
|
|
void ws2812_set_colour(uint8_t led, uint8_t red, uint8_t green, uint8_t blue){
|
|
|
|
if(led < LED_N){
|
|
set_byte(RESET_LEN + 24 * led, green);
|
|
set_byte(RESET_LEN + 24 * led + 8, red);
|
|
set_byte(RESET_LEN + 24 * led + 16, blue);
|
|
}
|
|
|
|
}
|
|
|
|
void ws2812_reset(void){
|
|
for(uint8_t i = 0; i < LED_N; i++){
|
|
ws2812_set_colour(i, 0, 0, 0);
|
|
}
|
|
}
|
|
|
|
static void set_byte(uint32_t pos, uint8_t value)
|
|
{
|
|
int i;
|
|
for (i = 0; i < 8; i++) {
|
|
if (value & 0x80) {
|
|
ledStripBuffer[pos + i] = PWM_ONE;
|
|
} else {
|
|
ledStripBuffer[pos + i] = PWM_ZERO;
|
|
}
|
|
|
|
value <<= 1;
|
|
}
|
|
}
|
|
|
|
|
|
|
|
void ws2812_wait(void){
|
|
while(HAL_TIM_GetChannelState(&htim2, TIM_CHANNEL_1)){}
|
|
}
|
|
|
|
|