arduino——互动交通信号灯

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arduino入门——互动交通灯

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int carred=12;
int caryellow=11;
int cargreen=10;
int button=9;
int pedred=8;
int pedgreen=7;
int crosstime=5000;
unsigned long changetime;


void setup() {
  // put your setup code here, to run once:
    pinMode(carred,OUTPUT);
    pinMode(caryellow,OUTPUT);
    pinMode(cargreen,OUTPUT);
    pinMode(pedred,OUTPUT);
    pinMode(pedgreen,OUTPUT);
    pinMode(button,INPUT);
    digitalWrite(cargreen,HIGH);
    digitalWrite(pedred,HIGH);    
}

void loop() {
  // put your main code here, to run repeatedly:
    int state=digitalRead(button);
    if(state==HIGH&&(millis() - changetime)>5000)
    {
      changelights();
    }
}

void changelights(){
    digitalWrite(cargreen,LOW);
    digitalWrite(caryellow,HIGH);
    delay(2000);

    digitalWrite(caryellow,LOW);
    digitalWrite(carred,HIGH);
    delay(1000);

    digitalWrite(pedred,LOW);
    digitalWrite(pedgreen,HIGH);
    delay(crosstime);
    for(int x=0;x<10;x++)
    {
        digitalWrite(pedgreen,HIGH);
        delay(250);
        digitalWrite(pedgreen,LOW);
        delay(250);
    }
    digitalWrite(pedred,HIGH);
        delay(500);

    digitalWrite(carred,LOW);
    digitalWrite(caryellow,HIGH);
    delay(1000);
    digitalWrite(caryellow,LOW);
    digitalWrite(cargreen,HIGH);

    changetime=millis();
}

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