#define ENCODER_CLK 34
#define ENCODER_DT 32

int lastClk=HIGH;
int SW = 26;
bool lastButtonStatus = false;

int count = 0;
int current_stateCLK;
int last_stateCLK;



void setup() {
  // put your setup code here, to run once:
  Serial.begin(115200);
  Serial.println("Hello, ESP32!");

  pinMode(ENCODER_CLK, INPUT);
  pinMode(ENCODER_DT, INPUT);

  pinMode(SW, INPUT);
  digitalWrite(SW, HIGH);//连接按钮的引脚设为上拉
  // Serial.begin(9600);



  // 读取inputCLK的初始状态
  // 赋值给 previousStateCLK 变量
  last_stateCLK = digitalRead(ENCODER_CLK);

  Serial.println(last_stateCLK);


}



void loop() {
  // put your main code here, to run repeatedly:
  // delay(10); // this speeds up the simulation



  int newClk = digitalRead(ENCODER_CLK);
  if (newClk != lastClk) {
    // There was a change on the CLK pin
    lastClk = newClk;
    int dtValue = digitalRead(ENCODER_DT);
    if (newClk == LOW && dtValue == HIGH) {
      Serial.println("Rotated clockwise ⏩");
    }
    if (newClk == LOW && dtValue == LOW) {
      Serial.println("Rotated counterclockwise ⏪");
    }
  }



  current_stateCLK = digitalRead(ENCODER_CLK); //读取CLK的当前状态
  // 如果CLK 的先前状态和当前状态不同，则发生脉冲
  if (current_stateCLK != last_stateCLK  && current_stateCLK == 1) {
    // 如果 inputDT 状态与 inputCLK 状态不同，则
    // 编码器逆时针旋转
    if (digitalRead(ENCODER_DT) != current_stateCLK) {
      count --;
      if (count < 0)
        count = 0;
    } else {
      // 编码器顺时针旋转
      count ++;
      if (count > 179)
        count = 179;
    }

    Serial.print("角度位置: ");
    Serial.println(count);
  }
 
  last_stateCLK = current_stateCLK; // 用当前状态更新 last_stateCLK



  // bool buttonStatus = !digitalRead(SW);//高电平时未按下，状态为false
  // if (buttonStatus != lastButtonStatus)
  // {
  //   Serial.println(buttonStatus ? "按下SW" : "松开SW");
  //   lastButtonStatus = buttonStatus; //保存当前状态
  // }
  

}