// https://wokwi.com/projects/327827412674937427
// David Forrest 2022-04-02

// Preliminary demo for testing stepper motor drivers per
// https://github.com/wokwi/wokwi-features/issues/191

void setup() {
  // put your setup code here, to run once:
  Serial.begin(115200);

  Serial.print("UnoCncShieldV3.ino Wiring\n");

  pinMode(2, OUTPUT); // X-step
  pinMode(3, OUTPUT); // Y-step
  pinMode(4, OUTPUT); // Z-step
  pinMode(5, OUTPUT); // X-dir
  pinMode(6, OUTPUT); // Y-dir
  pinMode(7, OUTPUT); // Z-dir

  pinMode(8, OUTPUT); // !Enable
  pinMode(12, OUTPUT); // A-STEP
  pinMode(13, OUTPUT); // A-DIR

  PIND = 0b10100000; // Reverse direction XYZ
  
  digitalWrite(8, LOW); // !ENABLE

}

void loop() {

  PIND = 0b11100; PIND = 0b11100; // low-level simulaneous toggle XYZ step pins
  //PINB = bit(4); PINB = bit(4);   // low level A-step toggle
  //delay(100);
  delayMicroseconds(35);  // 35us delivers 29Ksteps/sec
}