int switchPin1 = 7;//定义switchPin1引脚为7链接加速键
int switchPin2 = 8;//定义switchPin2引脚为8链接减速键
int motorspeed = 9; //定义motorspeed引脚为9
int a=0;//变量a用来存储数值
void setup() {
pinMode(switchPin1,INPUT);//设定switchPin1引脚为输入状态
pinMode(switchPin2,INPUT);//设定switchPin2引脚为输入状态
pinMode(motorspeed,OUTPUT);//设定motorspeed引脚为输出状态
}
void loop()
{if (LOW == digitalRead(switchPin1))//如果switchPin1为低电平
{a=a+ 10;
analogWrite(motorspeed,a);//将a的值赋给motorspeed
delay(1000);}//延时一秒
if(LOW == digitalRead(switchPin2))//如果switchPin2为低电平
{
a=a- 10;
analogWrite(motorspeed,a);//将a的值赋给motorspeed
delay(1000);//延时一秒
}
}
|
