//长按选择具体灯，松手上升沿触发中断更换频率

// 定义 LED 引脚
const int ledPin1 = 5;//红灯
const int ledPin2 = 18;//蓝灯
const int ledPin3 = 11;//黄灯
const int keyPin1 = 42; //按键
int deng=0;
// 定义亮度调节相关变量
int brightness = 0;             // 当前亮度值 (0-255)
int fadeAmount = 0;             // 每次调节的亮度增量
int ledbule = 0;
int ledbule1 = 0;
int ledyellow = 0;
int ledyellow1 = 0;
unsigned long lastInterruptTime = 0;  // 上次中断的时间
const unsigned long debounceDelay = 100; // 防抖延迟（毫秒）
void setup() {
  Serial.begin(115200);         // 初始化串口，波特率设置为115200
  pinMode(ledPin1, OUTPUT);
  pinMode(ledPin2, OUTPUT);
  pinMode(ledPin3, OUTPUT);
  pinMode(keyPin1, INPUT_PULLUP);
  attachInterrupt(digitalPinToInterrupt(keyPin1), key1,RISING); //松手切换频率
}
void loop() {
    // 设置 LED 的亮度
    analogWrite(ledPin1, brightness);
     brightness += fadeAmount;
    if (brightness <= 0 || brightness >= 255) {
      fadeAmount = -fadeAmount; // 反转增量方向
    }
    analogWrite(ledPin2, ledbule);
      ledbule += ledbule1;
    if (ledbule <= 0 || ledbule >= 255) {
      ledbule1 = -ledbule1; // 反转增量方向
    }
    analogWrite(ledPin3, ledyellow);
      ledyellow += ledyellow1;
    if (ledyellow <= 0 || ledyellow >= 255) {
      ledyellow1 = -ledyellow1; // 反转增量方向
    }
    delay(20);
    if(digitalRead(keyPin1)==0)
    {
        delay(20);
        if(digitalRead(keyPin1)==0)
        {
             if(deng<3)
              {
                deng++;
                Serial.print(deng);
                Serial.println("灯"); // 打印换行符
              }else
              {
              deng=1;
              Serial.print(deng);
              Serial.println("灯"); // 打印换行符
              }
        }
      delay(2000);//长按选择具体的灯
    }
}
void key1()
{
  unsigned long interruptTime = millis(); // 当前时间
  // 检查与上次中断时间的间隔是否大于防抖延迟
  if (interruptTime - lastInterruptTime > debounceDelay)
  {
    // 禁用中断
    detachInterrupt(digitalPinToInterrupt(keyPin1));
    
    Serial.println("更改频率成功"); // 输出信息
    if(deng==1)
    {
      if(fadeAmount<15)
      {
        fadeAmount+=5;
      }else
      {
        fadeAmount=0;
      }
    }
     if(deng==2)
    {
      if(ledbule1<15)
      {
        ledbule1+=5;
      }else
      {
        ledbule1=0;
      }
    }
     if(deng==3)
    {
      if(ledyellow1<15)
      {
        ledyellow1+=5;
      }else
      {
        ledyellow1=0;
      }
    }
    attachInterrupt(digitalPinToInterrupt(keyPin1), key1, RISING);
  }
  lastInterruptTime = interruptTime; // 更新上次中断时间
}