adc.c

/* 
Program to use the ADC Module of the Freescale microcontroler S08QG8
Using 3 channels (GPIO)
*/

unsigned char ADC_value[3];
unsigned char ADC_sel[] = {0x60, 0x63, 0x66};
unsigned char i;

interrupt VectorNumber_Vadc void ADC_ISR (void)
{
  ADCSC1 = ADC_sel[i];
  ADC_value[i++] = ADCRL;
  
  if( i == 3 ) 
  {
    i = 0;
  }
}

void main ( void )
{
  i = 0; 
  
  //activar 3 canales, 3 pines como entradas analogicas
  
  APCTL1_ADPC0 = 1; 
  APCTL1_ADPC3 = 1;
  APTL1_ADPC6 = 1;
  
  ADCSC1 = 0b01100000;  //para leer del canal cero

  do
  {
    __RESET_WATCHDOG();
  }while (1) ;
  
}