arduino-esp32-custom-lwip-p.../cores/esp32/esp32-hal-rgb-led.c

48 lines
1.2 KiB
C

#include "esp32-hal-rgb-led.h"
void neopixelWrite(uint8_t pin, uint8_t red_val, uint8_t green_val, uint8_t blue_val){
rmt_data_t led_data[24];
static rmt_obj_t* rmt_send = NULL;
static bool initialized = false;
uint8_t _pin = pin;
#ifdef RGB_BUILTIN
if(pin == RGB_BUILTIN){
_pin = RGB_BUILTIN-SOC_GPIO_PIN_COUNT;
}
#endif
if(!initialized){
if((rmt_send = rmtInit(_pin, RMT_TX_MODE, RMT_MEM_64)) == NULL){
log_e("RGB LED driver initialization failed!");
rmt_send = NULL;
return;
}
rmtSetTick(rmt_send, 100);
initialized = true;
}
int color[] = {green_val, red_val, blue_val}; // Color coding is in order GREEN, RED, BLUE
int i = 0;
for(int col=0; col<3; col++ ){
for(int bit=0; bit<8; bit++){
if((color[col] & (1<<(7-bit)))){
// HIGH bit
led_data[i].level0 = 1; // T1H
led_data[i].duration0 = 8; // 0.8us
led_data[i].level1 = 0; // T1L
led_data[i].duration1 = 4; // 0.4us
}else{
// LOW bit
led_data[i].level0 = 1; // T0H
led_data[i].duration0 = 4; // 0.4us
led_data[i].level1 = 0; // T0L
led_data[i].duration1 = 8; // 0.8us
}
i++;
}
}
rmtWrite(rmt_send, led_data, 24);
}