/*
 * Lesson 109-4: Using Two MCP4725 DAC Modules with Arduino
 * Each module can have independent different voltage sources and
 * can be set to output independent voltages.
 *
 * Watch video instructions for this code: https://youtu.be/j_BwZT9z-0g
 *
 * Projects in this video: https://youtu.be/j_BwZT9z-0g
 * Project 1: Output 0 to 5V or 0 to 3V depending on which kind of power source you use for the module. The output is shown on a digital multimeter.
 * Project 2: Serial command to set voltage
 * Project 3: PWM duty cycle to voltage converter
 * Project 4 (this project): Using two MCP4725 DAC modules
 * Project 5: Using a push button to set voltage on LCD
 *
 * Written by Ahmad Shamshiri using the Adafruit library for MCP4725
 * September 26, 2022
 * www.Robojax.com
 *
 * This code is part of the Arduino Step by Step Course which starts here:  https://youtu.be/-6qSrDUA5a8
 *
 * For the library for this code, visit http://robojax.com/
 *
 * If you found this tutorial helpful, please support me so I can continue creating
 * content like this. Make a donation using PayPal by credit card: https://bit.ly/donate-robojax
 *
 * 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/>.
 *
 * Based on the Adafruit MCP4725 Library
 * ----> http://www.adafruit.com/products/935
 *
 * Adafruit invests time and resources providing this open source code,
 * please support Adafruit and open-source hardware by purchasing
 * products from Adafruit!
 */

#include <Wire.h>
#include <Adafruit_MCP4725.h>
int refV1 = 4548;//set reference voltage for module 2 in mV
int refV2 = 3300;//set reference voltage for module 2 in mV

Adafruit_MCP4725 dac1;
Adafruit_MCP4725 dac2;

int mV1, mV2;//defining variable for millivot value for 1st and 2nd module
float V1, V2;//defining variable for volt value for 1st and 2nd module



void setup(void) {
  Serial.begin(9600);
  Serial.println("MCP4725 by Robojax");
  //run i2C scanner to find out the I2C address and enter it below
  //see video for details https://youtu.be/j_BwZT9z-0g
  //get more code from www.Robojax.com   
  dac1.begin(0x60);//set I2C address for device dac1 
  dac2.begin(0x61);//set I2C address for device dac2 
  
  Serial.println("Dual MCP4725 Devices");
}

void loop(void) {

    setmV2(1353);
    Serial.print ("DAC1: ");
    Serial.print(mV1);
    Serial.println("mV");
    delay(5000);
    
    setV2(2.624);
    Serial.print ("DAC2: ");    
    Serial.print(V2, 3);
    Serial.println("V");
    delay(5000);
    Serial.println();
      //see video for details https://youtu.be/j_BwZT9z-0g
  //get more code from www.Robojax.com 
}

/*
 * setmV1()
 * sets mV value such as 35mV or 2654mV (2.654V)
 * Written September 25, 2022
 * by Ahmad Shamshiri www.Robojax.com
 */
void setmV1(int d)
{
  
    mV1 =d;
    dac1.setVoltage(map(d, 0, refV1, 0, 4095), false);

}


/*
 * setV1()
 * sets voltage value in volts such as 3.764
 * Written September 25, 2022
 * by Ahmad Shamshiri www.Robojax.com
 */
void setV1(float d)
{
    V1= d;
    dac1.setVoltage( map((d *1000), 0, refV1, 0, 4095), false);

}  

/*
 * setmV2()
 * sets mV value such as 35mV or 2654mV (2.654V)
 * Written September 25, 2022
 * by Ahmad Shamshiri www.Robojax.com
 */
void setmV2(int d)
{
  
    mV2 =d;
    dac2.setVoltage(map(d, 0, refV2, 0, 4095), false);

}


/*
 * setV2()
 * sets voltage value in volts such as 3.764
 * Written September 25, 2022
 * by Ahmad Shamshiri www.Robojax.com
 */
void setV2(float d)
{
    V2= d;
    dac2.setVoltage( map((d *1000), 0, refV2, 0, 4095), false);

}