LearnigKit for Windows10 ESP32-WROVER

/**********************************************************************

  Filename    : Drive Stepper Motor

  Description : Use ULN2003 to drive the stepper motor.

  Auther      : www.freenove.com

  Modification: 2020/07/11

**********************************************************************/

// Conncet the port of the stepper motor driver

int outPorts[] = {14, 27, 26, 25};

void setup() {

  // set pins to output

  for (int i = 0; i < 4; i++) {

    pinMode(outPorts[i], OUTPUT);

  }

}

void loop()

{

  // Rotate a full turn

  moveSteps(true, 32 * 64, 3);

  delay(1000);

  // Rotate a full turn towards another direction

  moveSteps(false, 32 * 64, 3);

  delay(1000);

}

//Suggestion: the motor turns precisely when the ms range is between 3 and 20

void moveSteps(bool dir, int steps, byte ms) {

  for (unsigned long i = 0; i < steps; i++) {

    moveOneStep(dir); // Rotate a step

    delay(constrain(ms,3,20));        // Control the speed

  }

}

void moveOneStep(bool dir) {

  // Define a variable, use four low bit to indicate the state of port

  static byte out = 0x01;

  // Decide the shift direction according to the rotation direction

  if (dir) {  // ring shift left

    out != 0x08 ? out = out << 1 : out = 0x01;

  }

  else {      // ring shift right

    out != 0x01 ? out = out >> 1 : out = 0x08;

  }

  // Output singal to each port

  for (int i = 0; i < 4; i++) {

    digitalWrite(outPorts[i], (out & (0x01 << i)) ? HIGH : LOW);

  }

}

void moveAround(bool dir, int turns, byte ms){

  for(int i=0;i<turns;i++)

    moveSteps(dir,32*64,ms);

}

void moveAngle(bool dir, int angle, byte ms){

  moveSteps(dir,(angle*32*64/360),ms);

}

/**********************************************************************

  Filename    : BreathingLight

  Description : Make led light fade in and out, just like breathing.

  Auther      : www.freenove.com

  Modification: 2020/07/11

**********************************************************************/

#define PIN_LED   2   //define the led pin

#define CHN       0   //define the pwm channel

#define FRQ       1000  //define the pwm frequency

#define PWM_BIT   8     //define the pwm precision

void setup() {

  ledcSetup(CHN, FRQ, PWM_BIT); //setup pwm channel

  ledcAttachPin(PIN_LED, CHN);  //attach the led pin to pwm channel

}

void loop() {

  for (int i = 0; i < 255; i++) { //make light fade in

    ledcWrite(CHN, i);

    delay(10);

  }

  for (int i = 255; i > -1; i--) {  //make light fade out

    ledcWrite(CHN, i);

    delay(10);

  }

}