当我按下按钮时如何打开LED,然后再次按下该按钮时将其关闭?
这是我的代码:
const int buttonPin = 2;
const int ledPin = 13;
int buttonState = 0;
void setup() {
pinMode(buttonPin, INPUT);
pinMode(ledPin, OUTPUT);
Serial.begin(9600);
}
void loop() {
buttonState = digitalRead(buttonPin);
if (buttonState == HIGH) {
digitalWrite(ledPin, HIGH);
} else {
digitalWrite(ledPin, LOW);
}
}
现在,只要我按下按钮,LED就会亮起......
我在这里添加了组件和代码: https://www.tinkercad.com/things/dT2gVL0hJVf-swanky-krunk/editel?sharecode=s6M2OOyAQCZ8cePou13PBvkByEE-qr-baUN6UwUuckA=
答案 0 :(得分:0)
使用此代码,onAndOff是布尔值,其中包含两个值中的一个(true,false)如果led已关闭,我们将false放入其中如果led已打开则我们将其置为true并且当我们检查其是真还是假时按下按钮,如果它是假的,然后打开led并在onAndOff中输入true,否则关闭led并在onAndOff中放入false
const int buttonPin = 2;
const int ledPin = 13;
bool onAndOff = false;
int buttonState = 0;
void setup() {
pinMode(buttonPin, INPUT);
pinMode(ledPin, OUTPUT);
Serial.begin(9600);
}
void loop() {
buttonState = digitalRead(buttonPin);
if (buttonState == HIGH) {
if (onAndOff == false) {
onAndOff = true;
digitalWrite(ledPin, HIGH);
} else {
onAndOff = false;
digitalWrite(ledPin, LOW);
}
}
}