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標題: ESP32產生PWM的Arduino程序 [打印本頁]

作者: EdwardGU123 時間: 2022-12-28 12:41
標題: ESP32產生PWM的Arduino程序
const int ledPin = 2;  // PWM生成后實際輸出引腳
//設置PWM參數
const int freq = 4000;//PWM頻率
const int ledChannel = 0;//信號生成GPIO
const int resolution = 12;//12位分辨率，by Jason. 可設置1~14bits
void setup(){
  //PWM參數設置
  ledcSetup(ledChannel, freq, resolution);
  //將生成信號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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