Motor Control need help with program

Using Arduino Programming Questions
#1

Hi im trying to control a small car using two motors and two small H-bridges (sn754410ne) but i am having problems programming it. currently what i am trying to do is just get it to drive round a "circuit" which is what im trying to program into it.

//H-bridge 1 (steering)
 const int motor1Pin = 3;    // H-bridge leg 1 (pin 2, 1A)
 const int motor2Pin = 4;    // H-bridge leg 2 (pin 7, 2A)
 const int enablePin = 9;    // H-bridge enable pin
 const int ledPin = 13;
//H-bridge 2 (drive wheels) 
 const int motor3Pin = 5;    // H-bridge leg 1 (pin 2, 1A)
 const int motor4Pin = 7;    // H-bridge leg 2 (pin 7, 2A)
 const int enablePin1 = 10;    // H-bridge enable pin

void setup() {

    // set all the other pins you're using as outputs:
    pinMode(motor1Pin, OUTPUT); 
    pinMode(motor2Pin, OUTPUT); 
    pinMode(enablePin, OUTPUT);
    pinMode(ledPin, OUTPUT);

    // set enablePin high so that motor can turn on:
    digitalWrite(enablePin, HIGH); 
//--------------------------------------------------------------------     

    // set all the other pins you're using as outputs:
    pinMode(motor3Pin, OUTPUT); 
    pinMode(motor4Pin, OUTPUT); 
    pinMode(enablePin1, OUTPUT);
    

    // set enablePin high so that motor can turn on:
    digitalWrite(enablePin1, HIGH); 
}

void loop() {
  //should turn front wheels left and right  
 digitalWrite(motorPin1, HIGH);
 digitalWrite(motorPin, LOW);
  
}else{
  digitalWrite(motorPin1, LOW);
  digitalWrite(motorPin2, HIGH);
}
//should drive and reverse
{digitalWrite(motorPin3, HIGH);
 digitalWrite(motorPin4, LOW);

}else{
  digitalWrite(motorPin3, LOW);
  digitalWrite(motorPin4, HIGH);
}

void loop is where my problem lies it tells me that motorPin1 has not been declared and if i remove digitalWrite(motorPin1, HIGH); it tells me the same for the next part.

can anyone help me solve this problem, i am new to arduino but i have done most of the example codes including motors.

thankyou in advance.

beechey

#2

oid loop is where my problem lies it tells me that motorPin1 has not been declared

Not surprising - it isn't declared.

Look again, carefully.

#3

void loop is where my problem lies it tells me that motorPin1 has not been declared and if i remove digitalWrite(motorPin1, HIGH); it tells me the same for the next part.

The compiler is right.

 const int motor1Pin = 3;    // H-bridge leg 1 (pin 2, 1A)
 const int motor2Pin = 4;    // H-bridge leg 2 (pin 7, 2A)

motor1Pin is not the same as motorPin1.

Which is why either name is lousy. How about names that mean something, like leftMotorPin or rightMotorPin?

#4

ahh yes i see what iv done thankyou

and numbers seemed easiest to me to be honest.

#5