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const int buttonPin = 2;
const int ledPin = 13;
int ledState = HIGH;
int buttonState;
int lastButtonState = LOW;
long lastDebounceTime = 0;
long debounceDelay = 50;
void setup() {
pinMode(buttonPin, INPUT);
pinMode(ledPin, OUTPUT);
digitalWrite(ledPin, ledState);
}
void loop() {
int reading = digitalRead(buttonPin);
if (reading != lastButtonState) {
lastDebounceTime = millis();
}
if ((millis() - lastDebounceTime) > debounceDelay) {
--> if (reading != buttonState) {
buttonState = reading;
if (buttonState == HIGH) {
ledState = !ledState;
}
}
}
digitalWrite(ledPin, ledState);
lastButtonState = reading;
}
請(qǐng)問(wèn)那位大神可以解釋一下劃箭頭的地方if中buttonState與reading不是相同的嗎？，為什么可以比較。謝謝。如果錯(cuò)了是不是把buttonState改為lastbuttonState就行了。
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