arduino循迹小车代码

以下是一个简单的Arduino循迹小车代码，可以用于基本的循迹：

int leftMotor1 = 2; //左电机引脚1
int leftMotor2 = 3; //左电机引脚2
int rightMotor1 = 4; //右电机引脚1
int rightMotor2 = 5; //右电机引脚2
int leftSensor = A0; //左传感器引脚
int rightSensor = A1; //右传感器引脚
int threshold = 500; //传感器阈值

void setup() {
  pinMode(leftMotor1, OUTPUT);
  pinMode(leftMotor2, OUTPUT);
  pinMode(rightMotor1, OUTPUT);
  pinMode(rightMotor2, OUTPUT);
  pinMode(leftSensor, INPUT);
  pinMode(rightSensor, INPUT);
}

void loop() {
  int leftValue = analogRead(leftSensor); //读取左传感器值
  int rightValue = analogRead(rightSensor); //读取右传感器值

  if (leftValue > threshold && rightValue > threshold) { //如果两个传感器都在黑线上
    digitalWrite(leftMotor1, HIGH); //左电机正转
    digitalWrite(leftMotor2, LOW);
    digitalWrite(rightMotor1, HIGH); //右电机正转
    digitalWrite(rightMotor2, LOW);
  }
  else if (leftValue > threshold) { //如果左传感器在黑线上
    digitalWrite(leftMotor1, LOW); //左电机停止
    digitalWrite(leftMotor2, LOW);
    digitalWrite(rightMotor1, HIGH); //右电机正转
    digitalWrite(rightMotor2, LOW);
  }
  else if (rightValue > threshold) { //如果右传感器在黑线上
    digitalWrite(leftMotor1, HIGH); //左电机正转
    digitalWrite(leftMotor2, LOW);
    digitalWrite(rightMotor1, LOW); //右电机停止
    digitalWrite(rightMotor2, LOW);
  }
  else { //如果两个传感器都不在黑线上
    digitalWrite(leftMotor1, LOW); //左电机停止
    digitalWrite(leftMotor2, LOW);
    digitalWrite(rightMotor1, LOW); //右电机停止
    digitalWrite(rightMotor2, LOW);
  }
}

该代码使用两个红外线传感器来检测黑线，如果两个传感器都在黑线上，则小车前进；如果左传感器在黑线上，则小车向右转；如果右传感器在黑线上，则小车向左转；如果两个传感器都不在黑线上，则小车停止。您可以根据自己的需要进行修改和调整。