clarify pin variables, remove set low

diff --git a/motor/motor.ino b/motor/motor.ino
index 62d8bee50f3127876f4e14a0efb8a50c598ee9b6..7bd92648ae3fdb46678986f8ce5d5bfd449a8fa2 100644 (file)
--- a/motor/motor.ino
+++ b/motor/motor.ino
@@ -14,36 +14,30 @@
  */
 
 // define which pins are connected to which components
-int left_motor_speed = 3;
-int left_motor_forward = 4;
-int left_motor_backward = 5;
+int left_motor_speed_pin = 3;
+int left_motor_forward_pin = 4;
+int left_motor_backward_pin = 5;
 
-int right_motor_speed = 10;
-int right_motor_forward = 9;
-int right_motor_backward = 8;
+int right_motor_speed_pin = 8;
+int right_motor_forward_pin = 9;
+int right_motor_backward_pin = 10;
 
 void setup(){
-  pinMode(left_motor_speed, OUTPUT);
-  pinMode(left_motor_forward, OUTPUT);
-  pinMode(left_motor_backward, OUTPUT);
+  // the arduino will change the voltage on these pins
+  //  therefore, these pins are OUTPUT pins
+  pinMode(left_motor_speed_pin, OUTPUT);
+  pinMode(left_motor_forward_pin, OUTPUT);
+  pinMode(left_motor_backward_pin, OUTPUT);
 
-  pinMode(right_motor_speed, OUTPUT);
-  pinMode(right_motor_forward, OUTPUT);
-  pinMode(right_motor_backward, OUTPUT);
-
-  digitalWrite(left_motor_speed, LOW);
-  digitalWrite(left_motor_forward, LOW);
-  digitalWrite(left_motor_backward, LOW);
-
-  digitalWrite(right_motor_speed, LOW);
-  digitalWrite(right_motor_forward, LOW);
-  digitalWrite(right_motor_backward, LOW);}
+  pinMode(right_motor_speed_pin, OUTPUT);
+  pinMode(right_motor_forward_pin, OUTPUT);
+  pinMode(right_motor_backward_pin, OUTPUT);}
 
 void loop(){
-  digitalWrite(left_motor_forward, HIGH);
-  digitalWrite(left_motor_backward, LOW);
-  analogWrite(left_motor_speed, 128);
+  digitalWrite(left_motor_backward_pin, LOW);
+  digitalWrite(left_motor_forward_pin, HIGH);
+  analogWrite(left_motor_speed_pin, 128);
 
-  digitalWrite(right_motor_forward, HIGH);
-  digitalWrite(right_motor_backward, LOW);
-  analogWrite(right_motor_speed, 128);}
+  digitalWrite(right_motor_backward_pin, LOW);
+  digitalWrite(right_motor_forward_pin, HIGH);
+  analogWrite(right_motor_speed_pin, 128);}