ESP32產(chǎn)生PWM的Arduino程序

ID:1059445 · 發(fā)表于 2022-12-28 12:41

const int ledPin = 2;  // PWM生成后實(shí)際輸出引腳
//設(shè)置PWM參數(shù)
const int freq = 4000;//PWM頻率
const int ledChannel = 0;//信號(hào)生成GPIO
const int resolution = 12;//12位分辨率，by Jason. 可設(shè)置1~14bits
void setup(){
  //PWM參數(shù)設(shè)置
  ledcSetup(ledChannel, freq, resolution);
  //將生成信號(hào)通道綁定到輸出通道上
  ledcAttachPin(ledPin, ledChannel);
}
void loop(){
  //逐漸變亮，12位分辨率因而到4096
  for(int dutyCycle = 0; dutyCycle <= 123;dutyCycle++){
// changing the LED brightness withPWM
ledcWrite(ledChannel, dutyCycle);
delay(20);
  }
  //逐漸變暗
  for(int dutyCycle = 123; dutyCycle >= 0;dutyCycle--){
// changing the LED brightness with PWM
ledcWrite(ledChannel,dutyCycle);
delay(20);
  }
}

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