/*A4988 Arduino Bipolar Stepper Motor Controller*/

#define STEP 6
#define DIR  5
#define TSCCW 11
#define TSACW 12

void pulseStep(void);

void setup() {
  pinMode(STEP, OUTPUT);
  pinMode(DIR, OUTPUT);
  pinMode(TSCCW, INPUT_PULLUP);
  pinMode(TSACW, INPUT_PULLUP);
}

void loop() {
  if(digitalRead(TSCCW) == LOW) {
    while( digitalRead(TSCCW) == LOW );
    digitalWrite(DIR, HIGH);
    pulseStep();
  }
  if(digitalRead(TSACW) == LOW) {
    while( digitalRead(TSACW) == LOW );
    digitalWrite(DIR, LOW);
    pulseStep();
  }
}


void pulseStep(void) {
  digitalWrite(STEP, HIGH);
  delay(50);
  digitalWrite(STEP, LOW);
  delay(50);
}