ESP32: RGB-модуль

Подключим RGB-модуль с общим катодом

Задействуем выводы платы 21, 22, 23 и GND.

// use first 3 channels of 16 channels (started from zero)
#define LEDC_CHANNEL_0_R  0
#define LEDC_CHANNEL_1_G  1
#define LEDC_CHANNEL_2_B  2

// use 13 bit precission for LEDC timer
#define LEDC_TIMER_13_BIT  13

// use 5000 Hz as a LEDC base frequency
#define LEDC_BASE_FREQ     5000

// LED PINs
#define LED_PIN_R   21
#define LED_PIN_G   22
#define LED_PIN_B   23

// Arduino like analogWrite
// value has to be between 0 and valueMax
void ledcAnalogWrite(uint8_t channel, uint32_t value, uint32_t valueMax = 255) {
  // calculate duty
  uint32_t duty = (LEDC_BASE_FREQ / valueMax) * min(value, valueMax);

  // write duty to LEDC
  ledcWrite(channel, duty);
}

void setup() {
  // Setup timer and attach timer to a led pins
  ledcSetup(LEDC_CHANNEL_0_R, LEDC_BASE_FREQ, LEDC_TIMER_13_BIT);
  ledcAttachPin(LED_PIN_R, LEDC_CHANNEL_0_R);
  ledcSetup(LEDC_CHANNEL_1_G, LEDC_BASE_FREQ, LEDC_TIMER_13_BIT);
  ledcAttachPin(LED_PIN_G, LEDC_CHANNEL_1_G);
  ledcSetup(LEDC_CHANNEL_2_B, LEDC_BASE_FREQ, LEDC_TIMER_13_BIT);
  ledcAttachPin(LED_PIN_B, LEDC_CHANNEL_2_B);
}

void loop() {
  ledcAnalogWrite(LEDC_CHANNEL_0_R, 0);
  ledcAnalogWrite(LEDC_CHANNEL_1_G, 0);
  ledcAnalogWrite(LEDC_CHANNEL_2_B, 0);
  delay(1000);

  for (int i = 0; i < 255; i++) {
    ledcAnalogWrite(LEDC_CHANNEL_0_R, i);
    delay(10);
  }
  for (int i = 255; i > 0; i--) {
    ledcAnalogWrite(LEDC_CHANNEL_0_R, i);
    delay(10);
  }

  for (int i = 0; i < 255; i++) {
    ledcAnalogWrite(LEDC_CHANNEL_1_G, i);
    delay(10);
  }
  for (int i = 255; i > 0; i--) {
    ledcAnalogWrite(LEDC_CHANNEL_1_G, i);
    delay(10);
  }

  for (int i = 0; i < 255; i++) {
    ledcAnalogWrite(LEDC_CHANNEL_2_B, i);
    delay(10);
  }
  for (int i = 255; i > 0; i--) {
    ledcAnalogWrite(LEDC_CHANNEL_2_B, i);
    delay(10);
  }

  for (int i = 0; i < 255; i++) {
    ledcAnalogWrite(LEDC_CHANNEL_0_R, i);
    ledcAnalogWrite(LEDC_CHANNEL_1_G, i);
    ledcAnalogWrite(LEDC_CHANNEL_2_B, i);
    delay(10);
  }
  for (int i = 255; i > 0; i--) {
    ledcAnalogWrite(LEDC_CHANNEL_0_R, i);
    ledcAnalogWrite(LEDC_CHANNEL_1_G, i);
    ledcAnalogWrite(LEDC_CHANNEL_2_B, i);
    delay(10);
  }
}

Дополнительные материалы

RGB-модуль использовался также в Базовых примерах.

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