#include <Keypad.h>
#include <Wire.h>
#include <Adafruit_MCP4725.h>


Adafruit_MCP4725 dac;

/// declarer paramètres keyboard
int dt = 1;
float tension_touche;
const byte ROWS = 2;
const byte COLS = 2;
uint16_t dacValue;


// tension minimum C0 et increment par demi ton du keyboard
int Vmin = 1;
float dV =1.0/12.0;

/// touches du keyboard
char hexaKeys[ROWS][COLS] = {
  {'A', 'B'},
  {'C', 'D'},
};
byte colPins[COLS] = {6, 7};
byte rowPins[ROWS] = {2, 3};

/// mapping keyboard avec lignes et colonnes
Keypad customKeypad = Keypad( makeKeymap(hexaKeys), rowPins, colPins, ROWS, COLS);

/// definition pin GATE, VELOCITY et OFFSET CV (?)
byte gatePin = 13;


void setup() {
    Serial.begin(9600);
    pinMode(gatePin, OUTPUT);
    digitalWrite(gatePin, LOW);
    // For Adafruit MCP4725A1 the address is 0x62 (default) or 0x63 (ADDR pin tied to VCC)
    // For MCP4725A0 the address is 0x60 or 0x61
    // For MCP4725A2 the address is 0x64 or 0x65
    dac.begin(0x60);  // L'adresse I2C du MCP4725 peut varier, assurez-vous de consulter la documentation du MCP4725

}



void loop() {


    /// Detecter touche du keyboard enfoncée et envoyer la bonne tension dans le DAC en fonction de la note
    char key = customKeypad.getKey();

    if (key) {
      digitalWrite(gatePin, HIGH);
      Serial.println("ON");
        switch (key) {
        case 'A':
            tension_touche = Vmin + 0*dV;
            dacValue = round(tension_touche*(4095/5));
            dac.setVoltage(dacValue, false);
            Serial.print(dacValue);
            break;
        case 'B':
            tension_touche = Vmin + 1*dV;
            dacValue = round(tension_touche*(4095/5));
            dac.setVoltage(dacValue, false);
            Serial.print(dacValue);
            break;
        case 'C':
            tension_touche = Vmin + 2*dV;
            dacValue = round(tension_touche*(4095/5));
            dac.setVoltage(dacValue, false);
            Serial.print(dacValue);
            break;
        case 'D':
            tension_touche = Vmin + 3*dV;
            dacValue = round(tension_touche*(4095/5));
            dac.setVoltage(dacValue, false);
            Serial.print(dacValue);
            break;
        }
    }
    else{

      digitalWrite(gatePin, LOW);

    }

}