Question

我想在arduino中制作一个5秒计时器，更详细一点，我有一个RGB led，我希望点亮一个颜色按下按钮的次数（我也有一个按钮），比如，在那5秒内led必须保持不亮，如果我按下按钮一次5秒钟，在计时器结束后（5秒），LED将变为红色，如果我按下按钮两次LED变为蓝色或不管。

const int buttonPin = 2;     // the number of the pushbutton pin
const int ledbPin =  13;      // the number of the LED pin
const int ledgPin =  12;      // the number of the LED pin
const int ledrPin =  11;      // the number of the LED pin
int count = 0;               // Count the button presses
unsigned long currentTime;
unsigned long loopTime;
// variables will change:
int buttonState = 0;         // variable for reading the pushbutton status

void setup() {
  // initialize the LED pin as an output:
  pinMode(ledrPin, OUTPUT);  
    pinMode(ledgPin, OUTPUT);     

     pinMode(ledbPin, OUTPUT);     
 currentTime = millis();
  loopTime = currentTime; 
  // initialize the pushbutton pin as an input:
  pinMode(buttonPin, INPUT);    
}

void loop(){
  // read the state of the pushbutton value:
  buttonState = digitalRead(buttonPin);

  // check if the pushbutton is pressed.
  // if it is, the buttonState is HIGH:
  if (buttonState == HIGH) {    
    count++;               // add 1 to the count
    if (count >= 1) {
    currentTime = millis();
      if(currentTime >= (loopTime + 5000)){ 
      if (count == 1) {
        digitalWrite(ledrPin, HIGH);
      }
      if (count == 2) {
        digitalWrite(ledgPin, HIGH);
      }
      if (count == 3) {
        digitalWrite(ledbPin, HIGH);
      }
      
      }
    }
    }
  }

这是我到目前为止写的：

计时器结束后，如果按下按钮，所有指示灯都会亮起，呈现白色。

Answer 1

这是因为你在循环中创建了一个if语句。循环太快了。当您按下并释放按钮时，它已经多次循环。在那些多次，你的伯爵仍然越来越高。我会在按钮的If语句中添加一个millis。我刚刚在这里做了一个例子。你可以按照自己的方式去做。

void loop(){
  // read the state of the pushbutton value:
  buttonState = digitalRead(buttonPin);

  // check if the pushbutton is pressed.
  // if it is, the buttonState is HIGH:
  if (buttonState == HIGH && currentTime == 500 (didnt look which one your timer is)) {    
    count++;               // add 1 to the count
    if (count >= 1) {
    currentTime = millis();
      if(currentTime >= (loopTime + 5000)){ 
      if (count == 1) {
        digitalWrite(ledrPin, HIGH);
      }
      if (count == 2) {
        digitalWrite(ledgPin, HIGH);
      }
      if (count == 3) {
        digitalWrite(ledbPin, HIGH);
      }

      }
    }
    }
  }

arduino 5秒计时器

1 个答案: