Arduino程序把按鍵作為開關(guān)的方法 (不用delay)

ID:989772 · 發(fā)表于 2022-1-9 10:18

(原創(chuàng))  不用delay, 不阻塞運行!

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int b2 = 0;    //button state,  default  HIGH
bool b2on = false;
int  wait = 0;    //counter when key is hold

void setup() {
  // initialize the LED pin as an output:
  pinMode(ledPin1, OUTPUT);
  // initialize the pushbutton pin as an input:
  pinMode(buttonPin1, INPUT);
}

void loop() {
  // read the state of the pushbutton value:
  b2 = digitalRead(buttonPin1);

  if( b2 == LOW ) // pressed,  from HIGH->LOW

  {
wait++;          // wait for release
  }

  if( b2 && wait > 39)             // button return back to HIGH, and  LOW for 39 times

{
b2on = !b2on;                // one CLICK  finished!
wait = 0;                         // reset
  }

  if (b2on) {
// turn LED on:
digitalWrite(ledPin1, HIGH);
  } else {
// turn LED off:
digitalWrite(ledPin1, LOW);
  }
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