Arduino 端口通信实例

//
//Arduino 1.0.x-----Arduino Uno----COM9
//使用3-10号引脚连接8个LED
//
int incomingByte = 0;   //输入的数据存储变量
int count=1;
void setup() {Serial.begin(9600);// opens serial port, sets data rate to 9600 bpsfor(int i=3;i<=10;i++)//打开3-10号引脚
        pinMode(i,OUTPUT);
}void loop() {while(count){Serial.println("please input 0 1 2 3 4 5 6 7 8 9 a");count=0;}//第一次操作说明，count为了第一次限制if (Serial.available() > 0){incomingByte = Serial.read();//读取Serial.println(incomingByte, DEC);//写入}//从COM口读取数据switch (incomingByte)//数据处理并对引脚进行调控
    {case 48://输入0时将3-10号引脚设为高电位，使所有的灯灭for(int i=3;i<=10;i++){digitalWrite(i,HIGH);}break;case 49://输入1从3-10号引脚电位依次设低电位维持0.5s，然后设为高电位，实现流水灯效果for(int i=3;i<=10;i++){digitalWrite(i,LOW);delay(500);digitalWrite(i,HIGH);}break;case 50://输入2流水灯，和输入1时方向相反for(int i=10;i>=3;i--){digitalWrite(i,LOW);delay(500);digitalWrite(i,HIGH);}break;    case 51: digitalWrite(3,LOW);break;//输入3，将3号电位调低，只让3号引脚的灯亮case 52: digitalWrite(4,LOW);break; //.....case 53: digitalWrite(5,LOW);break; //.....case 54: digitalWrite(6,LOW);break; //.....case 55: digitalWrite(7,LOW);break; //.....case 56: digitalWrite(8,LOW);break; //.....case 57: digitalWrite(9,LOW);break; //.....case 97: digitalWrite(10,LOW);break;//.....default: for(int i=3;i<=10;i++){digitalWrite(i,HIGH);}break;//将所电位调高关闭所有灯
    }
}