// https://wokwi.com/projects/380733829667456001 
// el modulo DAC no funciona en el simulador

#define PinADC  34
#define DACPin  25
int i = 0;
int valores_adc[19] = {0,109,230,454,804,954,1231,1471,1666,1933,2167,2397,2751,2973,3333,3685,3943,4030,4095};
float voleres_osci[19] = {0,0.134,0.233,0.407,0.682,0.809,1.02,1.21,1.36,1.57,1.75,1.95,2.22,2.4,2.66,2.88,3.01,3.05,3.09};
float pendiente = 0;
float voltage = 0;
int j = 0;
int valores_dac[12] = {0,25,50,75,100,125,150,175,20,225,250,255};
float tensiones_dac[12] ={0,0,0,0,0,0,0,0,0,0,0,0};
int dacVal;
int adcVAl;
float volt_dac;
void setup() {
  
   //set the resolution to 12 bits (0-4096)
  analogReadResolution(12); 

  // voltage full-range 150mV - 3100 mV
  analogSetAttenuation(ADC_11db);  //    ADC_0db,     ADC_2_5db,    ADC_6db,    ADC_11db

  // DAC channel 1 is attached to GPIO25, DAC channel 2 is attached to GPIO26
  // acepta valores de 0 a 255 -> Vout = 0 a 3.3v
  
  Serial.begin(115200);

  Serial.printf("Ejemplo de configuracion y uso ADC-DAC \n");

}

void loop()
{
    for (j = 0; j<12;j++)
    {
      dacWrite(DACPin, valores_dac[j]);
      int adcVal = analogRead(PinADC);  // leemos el valor del ADC

      //float voltage = (adcVal+97.539)/1316.9; // voltage corregido
      i = 0;
      //función calibración ADC en todos los puntos
      if (adcVal == 0)
      {
        voltage = 0;
      }
      else if (adcVal == 4095)
      {
        voltage = 3.09;
      }
      else
      {
        while (adcVal>valores_adc[i])
        {
          i++;
        }
        pendiente = (valores_adc[i] - valores_adc[i-1])/(valores_osci[i] - valores_osci[i-1]);
        voltage = pendiente*(adcVal-valores_adc[i-1]) + valores_osci[i-1];
      }
      tensiones_dac[j] = voltage;
    }
    for (i=0;i<12;i++)
    {
      Serial.printf("Tensiones:%1.3f\n",tensiones_dac[i]);
    }
    //dacWrite(DACPin, dacVal);  // ilumina más o menos el LED
    
    //Serial.printf("ADC Val: %d, DAC Val: %d, Voltage: %1.3f V \n", adcVal,dacVal, voltage);
    
    delay(1000);

}