UINT16 read_adc(UINT8 channel) {
if (channel == A1)
AD1CHS = ADC_CH0_NEG_SAMPLEA_NVREF | ADC_CH0_POS_SAMPLEA_AN4;
else if (channel == A0)
AD1CHS = ADC_CH0_NEG_SAMPLEA_NVREF | ADC_CH0_POS_SAMPLEA_AN2;
else
return 0;
int i;
for (i = 0; i < 10; i++); // small delay (may not be needed but w/e)
AcquireADC10();
for (i = 0; i < 100; i++); // Wait for sampling to complete
ConvertADC10();
while(!BusyADC10());
//AcquireADC10();
return ReadADC10(0);
}
CPU_INT16U ADC_GetVal (CPU_INT08U channel_to_convert)
{
CPU_INT08U buffer;
CPU_INT32U config;
switch (channel_to_convert)
{
case 0: config = ADC_CH0_NEG_SAMPLEA_NVREF | ADC_CH0_POS_SAMPLEA_AN0; break;
case 1: config = ADC_CH0_NEG_SAMPLEA_NVREF | ADC_CH0_POS_SAMPLEA_AN1; break;
case 2: config = ADC_CH0_NEG_SAMPLEA_NVREF | ADC_CH0_POS_SAMPLEA_AN2; break;
case 3: config = ADC_CH0_NEG_SAMPLEA_NVREF | ADC_CH0_POS_SAMPLEA_AN3; break;
case 4: config = ADC_CH0_NEG_SAMPLEA_NVREF | ADC_CH0_POS_SAMPLEA_AN4; break;
case 5: config = ADC_CH0_NEG_SAMPLEA_NVREF | ADC_CH0_POS_SAMPLEA_AN5; break;
case 6: config = ADC_CH0_NEG_SAMPLEA_NVREF | ADC_CH0_POS_SAMPLEA_AN6; break;
case 7: config = ADC_CH0_NEG_SAMPLEA_NVREF | ADC_CH0_POS_SAMPLEA_AN7; break;
case 8: config = ADC_CH0_NEG_SAMPLEA_NVREF | ADC_CH0_POS_SAMPLEA_AN8; break;
case 9: config = ADC_CH0_NEG_SAMPLEA_NVREF | ADC_CH0_POS_SAMPLEA_AN9; break;
case 10: config = ADC_CH0_NEG_SAMPLEA_NVREF | ADC_CH0_POS_SAMPLEA_AN10; break;
case 11: config = ADC_CH0_NEG_SAMPLEA_NVREF | ADC_CH0_POS_SAMPLEA_AN11; break;
case 12: config = ADC_CH0_NEG_SAMPLEA_NVREF | ADC_CH0_POS_SAMPLEA_AN12; break;
case 13: config = ADC_CH0_NEG_SAMPLEA_NVREF | ADC_CH0_POS_SAMPLEA_AN13; break;
case 14: config = ADC_CH0_NEG_SAMPLEA_NVREF | ADC_CH0_POS_SAMPLEA_AN14; break;
case 15: config = ADC_CH0_NEG_SAMPLEA_NVREF | ADC_CH0_POS_SAMPLEA_AN15; break;
config = ADC_CH0_NEG_SAMPLEA_NVREF | ADC_CH0_POS_SAMPLEA_AN0;
}
SetChanADC10(config);
//pour le changement de voie en entrée de l'adc, il faudra prévoir un temps pour que la tension se
//stabilise entre la comutation et l'échantillonnage. Le top se serait de changer de voie à la fin de la conversion précédente.
//Ce qui laisse du temps avant la conversion suivante. CBE
OSTimeDlyHMSM(0, 0, 0, 5);
ConvertADC10();
while (!BusyADC10()); // timeout ?? !!
buffer = 8 * (~ReadActiveBufferADC10() & 0x1); /* Select non active buffer */
return (ReadADC10(buffer)); /* Return ADC reading */
}
