DM542T.ino

int PUL = 10;
int DIR = 11;
int ENA = 12;

void setup() {
  pinMode(PUL, OUTPUT);
  pinMode(DIR, OUTPUT);
  pinMode(ENA, OUTPUT);

  digitalWrite(PUL, LOW);
  digitalWrite(ENA, LOW);
  digitalWrite(DIR, HIGH);

  Serial.begin(9600);
  Serial.println("init");

  digitalWrite(ENA, HIGH);
  delay(100);
  digitalWrite(ENA, LOW);
}

void movement(int dir, long steps, long delayMs) {
  for (long i=0; i<steps; i++) {
    digitalWrite(DIR, dir);
    digitalWrite(PUL, HIGH);
    delayMicroseconds(delayMs);
    digitalWrite(PUL, LOW);
  }
}

int d = 1000;
void loop() {
  // delay(1000);  return;
  long pulses = 800;
  long usecs = 100;
  while (true) {
    movement(LOW, pulses, usecs);
    delay(d);
    movement(HIGH, pulses, usecs);
    delay(d);
  }
}