CCS/UCD3138PFCEVM-026: SLUA708 PWR026_PFC

Hello,

You can find the adc result reading:

void poll_adc(void)
{
if(AdcRegs.ADCSTAT.bit.ADC_INT == 1)
{
iv.adc_raw[0] = AdcRegs.ADCRESULT[0].all;
iv.adc_raw[1] = AdcRegs.ADCRESULT[1].all;
iv.adc_raw[2] = AdcRegs.ADCRESULT[2].all;
iv.adc_avg[0] = AdcRegs.ADCAVGRESULT[0].all;
iv.adc_avg[1] = AdcRegs.ADCAVGRESULT[1].all;
iv.adc_avg[2] = AdcRegs.ADCAVGRESULT[2].all;
#if ((EMETER_EN==ON)&&(PFC_TYPE == SINGLE_PHASE))
iv.adc_raw[3] = AdcRegs.ADCRESULT[3].all;
iv.adc_avg[3] = AdcRegs.ADCAVGRESULT[3].all;
#endif
iv.vbus_filtered = iv.adc_raw[VBUS_CHANNEL] + iv.vbus_filtered - (iv.vbus_filtered >> 6);//Q18

//for EMI and IPM compensation
iv.cir_buff[iv.cir_buff_ptr] = iv.vin_raw; // Care
//iv.cir_buff[iv.cir_buff_ptr] = iv.vin_filtered;

iv.emi_pointer = (iv.cir_buff_ptr - iv.emi_buff_delay) & 0x3f; //get pointer to delayed signal
iv.ipm_pointer = (iv.cir_buff_ptr - iv.ipm_buff_delay) & 0x3f; //get pointer to delayed signal
iv.cir_buff_ptr = (iv.cir_buff_ptr + 1) & 0x3f;

AdcRegs.ADCCTRL.bit.SW_START = 1; //trigger sweep
}

}

But you need initialize the ADC related registers:

void init_adc_polled(void)
{
AdcRegs.ADCCTRL.bit.MAX_CONV = NUMBER_OF_ADC_CHANNELS_ACTIVE - 1;
AdcRegs.ADCCTRL.bit.SAMPLING_SEL = 6;//268KS/s

#if ((EMETER_EN==ON)&&(PFC_TYPE == SINGLE_PHASE))
PMBusRegs.PMBCTRL3.bit.IBIAS_A_EN = 0;//disable current source
PMBusRegs.PMBCTRL3.bit.IBIAS_B_EN = 0;

//for IPM board#1 (modified)
AdcRegs.ADCSEQSEL0.bit.SEQ0 = 3; //Vbus
AdcRegs.ADCSEQSEL0.bit.SEQ1 = 0; //Vac_L
AdcRegs.ADCSEQSEL0.bit.SEQ2 = 4; //Vac_N
AdcRegs.ADCSEQSEL0.bit.SEQ3 = 2; //Iac

.......

}

Regards,

Sean