//DUp;icator Motor Control
// Defin pins

const int engagefull = 2; // start full button
const int engagehalf = 3; // start half button
const int start = 4; //out to enable pin
const int driverPUL = 5;    // PUL- pin
// Variables
 
int pd = 3000;       // pulse delay period determines speed (increase to slow)
int myCounter = 0;   // initial counter state
int RotAmount = 50; // initial amount of steps for motor
boolean enable = HIGH; // start motor state

void setup() {
  delay(1000);
  digitalWrite(start,enable); // start motor
  pinMode (driverPUL, OUTPUT); //set pin to output
  pinMode (start, OUTPUT);  //set pin to output
  pinMode (engagefull, INPUT_PULLUP);
  pinMode (engagehalf, INPUT_PULLUP);
  attachInterrupt(digitalPinToInterrupt(engagefull), enablemotorfull, FALLING); //makes the button do a thing
  attachInterrupt(digitalPinToInterrupt(engagehalf), enablemotorhalf, FALLING); //makes the button do a thing
}
void enablemotorfull (){ // when full button is pressed, set RotAmount to 50 steps 
  enable = LOW;
  myCounter = 0; // reset counter
  RotAmount = 50;
}
void enablemotorhalf (){ // when half button is pressed, set RotAmount to 25 steps
  enable = LOW;
  myCounter = 0; // reset counter
  RotAmount = 25;

}

void loop() {
  if(myCounter<=RotAmount) { // sets how many times loop runs  
    digitalWrite(driverPUL,HIGH); // generat pulse signal pos
    delayMicroseconds(pd); // pos pulse length
    digitalWrite(driverPUL,LOW);// generat pulse signal pneg
    delayMicroseconds(pd); // neg pulse length
    myCounter = myCounter + 1;
  }

}