• 代碼一 按下點亮 不按熄滅

int led = 13;
int button = 3;
void setup(){
  pinMode(led,OUTPUT);
  pinMode(button,INPUT);
}
void loop(){
  Bstate = digitalRead(button);
  if (Bstate){
  digitalWrite(led,HIGH);
}else{
  digitalWrite(led,LOW);
}
}

按一次點亮

• 按一次點亮 再按一次熄滅

int led = 13;
int button = 3;
int state = 0;
void setup(){
  pinMode(led,OUTPUT);
  pinMode(button,INPUT);
}
void loop(){
  state = digitalRead(button);
  if (state){
  digitalWrite(led,state);
  state = !state;
} 
}

效果不對 理論上沒有錯

error

• 代碼檢查測試 抖動的原因

int led = 13;
int button = 3;
int state = 0;
int num =0;
void setup(){
  pinMode(led,OUTPUT);
  pinMode(button,INPUT);
  Serial.begin(9600);
}
void loop(){
  state = digitalRead(button);
  if (state){
  digitalWrite(led,state);
  state = !state;
  num++;
  Serial.println(num);
} 
}

測試結(jié)果
按下開關(guān) 數(shù)字跳動很快

抖動

• 改進版本 001 delay

int led = 13;
int button = 3;
int state = 0;
int num =0;
void setup(){
  pinMode(led,OUTPUT);
  pinMode(button,INPUT);
  Serial.begin(9600);
}
void loop(){
  state = digitalRead(button);
  if (state){
  digitalWrite(led,state);
  state = !state;
  num++;
  Serial.println(num);
  delay(200);
} 
}

delay

• 最終改進版本2 flag

int state = 1;
int button = 3 ;
int led = 9;
int num=0;
int Before=0;
void setup(){
  pinMode(led,OUTPUT);
  Serial.begin(9600);
  
}

void loop(){

  int Bstate = digitalRead(button);

  //Serial.println(Bstate);
  if (Bstate && Before==0){
    digitalWrite(led,state);
    state = !state;
    num++;
    Serial.println(num);
    //delay(200);
    Before =!Before;
  }else if(Bstate ==0 &&Before == 1){
    Before = !Before;
  }
}

代碼

final

圖形化最終：

圖形化