void motor(char pin,char pwmpin,char state,int val)
{
pinMode(pin, OUTPUT);
if(state==1)
{
analogWrite(pwmpin,val);
digitalWrite(pin,1);
}
else if(state==2)
{
analogWrite(pwmpin,val);
digitalWrite(pin,0);
}
else if(state==0)
{
analogWrite(pwmpin,0);
digitalWrite(pin,0);
}
}
void runfoward(int i) //前进
{
motor(4,5,1,i);
motor(7,6,1,i);
}
void runback(int j) //后退
{
motor(4,5,2,j);
motor(7,6,2,j);
}
void turnL(int m) //左转
{
motor(4,5,1,m);
motor(7,6,0,0);
}
void turnR(int n) //右转
{
motor(4,5,0,0);
motor(7,6,1,n);
}
void stop() //停止
{
motor(4,5,0,0);
motor(7,6,1,0);
}
void setup()
{
pinMode(10,INPUT);//定义右边传感器,
pinMode(11,INPUT);//定义中间传感器,
pinMode(12,INPUT);//定义左边传感器,
Serial.begin(9600);
}
void loop()
{
char num1,num2,num3;
num1=digitalRead(12);
num2=digitalRead(11);
num3=digitalRead(10);
if((num1==0)&&num2&&num3)
{
turnL(120); //检测到左边传感器遇到黑线，说明小车右偏了，立即往左转一点
delay(2);
while(1){
num2=digitalRead(11); //循环判断中间传感器度数，
if(num2==1)
{ turnL(120); //如果num2==1说明还没有转到中间位置，继续左转
delay(2);}
else
break; //检测到num2==0说明转过头了，跳出循环，检测三个传感器的状态再做出相应动作
} //后面道理相同
}
else if(num2&&num1&&(num3==0))
{
turnR(120);
delay(2);
while(1)
{
num2=digitalRead(11);
if(num2==1){
turnR(120);
delay(2);}
else
break;
}
}
else
{
runfoward(120);
delay(2);
}
}
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