/*
 * This Arduino Control Speed DC motor and START/STOP is using a push button
 * using XY-GMOS Mosfet Speed Switch Module
 * 
 * Watch Video instruction for this code:https://youtu.be/El5Dd51HBG8
 * 
 * Full explanation of this code and wiring diagram is available at
 * my Arduino Course at Udemy.com here: http://robojax.com/L/?id=62

 * Written by Ahmad Shamshiri on May 31, 2020 at 17:49 in Ajax, Ontario, Canada
 * in Ajax, Ontario, Canada. www.robojax.com
 * 

 * Get this code and other Arduino codes from Robojax.com
Learn Arduino step by step in a structured course with all material, wiring diagrams, and libraries
all in one place. Purchase My course on Udemy.com http://robojax.com/L/?id=62

If you found this tutorial helpful, please support me so I can continue creating 
content like this. 

or make a donation using PayPal http://robojax.com/L/?id=64

 *  * This code is "AS IS" without warranty or liability. Free to be used as long as you keep this note intact.* 
 * This code has been downloaded from Robojax.com
    This program is free software: you can redistribute it and/or modify
    it under the terms of the GNU General Public License as published by
    the Free Software Foundation, either version 3 of the License, or
    (at your option) any later version.

    This program is distributed in the hope that it will be useful,
    but WITHOUT ANY WARRANTY; without even the implied warranty of
    MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
    GNU General Public License for more details.

    You should have received a copy of the GNU General Public License
    along with this program.  If not, see <https://www.gnu.org/licenses/>.


*/

const int POT_PIN =A0;//can change
const int MOTOR_OUT_PIN = 3;
const int START_STOP_PIN=2;

const int SPEED_MAX = 100;// in %
const int SPEED_MIN = 0;//in %
const int STOP=0;
const int RUN=1;
int motorState=RUN;//
int motorSpeed = 0;//between 0 to 100%.

void pushButton();
void setup() {
    //Robojax XY-GMOS MOSFET Motor driver code
  Serial.begin(9600);
  Serial.println("Robojax XY-GMOS Motor,  Arduino");
  pinMode(START_STOP_PIN, INPUT_PULLUP);
  pinMode(MOTOR_OUT_PIN, OUTPUT);

  
}

// the loop routine runs over and over again forever:
void loop() {
 pushButton();
 int potValue =analogRead(POT_PIN);
 int speedPercent = map(potValue, 0, 1023, 0, 100);
Serial.print("speedPercent: "); Serial.println(speedPercent);

 if(motorState ==RUN)
 {
  motorControl(speedPercent);
 }else{
  stopMotor();
 }


  delay(500);
    //Robojax XY-GMOS MOSFET Motor driver code
}//loop end


/*
 * motorControl(int s)
 * @brief controls the motor with the value s
 * @param return nothing
 * @param "type" is character

 * on May 08, 2020 at 02:36 in Ajax, Ontario, Canada
 */
void motorControl(int s)
{
    //Robojax XY-GMOS MOSFET Motor driver code
  s = map(s, SPEED_MIN, SPEED_MAX, 0, 255);
  Serial.print("Speed: "); Serial.println(s);
  analogWrite(MOTOR_OUT_PIN, s);
}//motorControl


/*
 * stopMotor()
 * @brief stops the motor
 * @param return nothing
 * @param 

 * on May 08, 2020 at 02:36 in Ajax, Ontario, Canada
 */
void stopMotor(){
    //Robojax XY-GMOS MOSFET Motor driver code
  analogWrite( MOTOR_OUT_PIN, 0);
  Serial.println("STOPPED");
}//stopMotor()



/*
 * pushButton()
 * @brief reads the push button
 * @param return nothing
 * @param 

 * on May 08, 2020 at 02:36 in Ajax, Ontario, Canada
 */
void pushButton()
{
  //Robojax XY-GMOS MOSFET Motor driver code
  if(digitalRead(START_STOP_PIN) ==LOW)
  {
    motorState =!motorState;
    delay(100);
  }
  
}//pushButton()