TMS320F28379D: Question on using ADC calibration offset

Hi,

Could you please take a look at the adc_ex7_ppb_offset example from C2000WARE? 

Best Regards,

Ben Collier

Hi Ben,  

I did look at the offset example.  I am not seeing anything that I am doing differently.  I have a value set in ADCBBP1OFFCAL and the result that I see in ADCPPB1RESULT shows the raw result without subtracting the offset:

I only posted the PPB/SOC-related configuration in the original post, but more detailed setup is here:

    ADC_setPrescaler(ADCB_BASE, ADC_CLK_DIV_4_0);

    ADC_setInterruptPulseMode(ADCB_BASE, ADC_PULSE_END_OF_CONV);

    ADC_setSOCPriority(ADCB_BASE, ADC_PRI_ALL_HIPRI);

    ADC_enableConverter(ADCB_BASE);

    SysCtl_delay(1500U);

    ADC_setupSOC(ADCB_BASE, ADC_SOC_NUMBER0, ADC_TRIGGER_EPWM6_SOCA, ADC_CH_ADCIN5, 15); 

    ADC_setupPPB(ADCB_BASE, ADC_PPB_NUMBER1, ADC_SOC_NUMBER0);

    ADC_setPPBCalibrationOffset(ADCB_BASE, ADC_PPB_NUMBER1, 0x6C);  // 0x6C as an example

ADC_setInterruptSource(ADCB_BASE, ADC_INT_NUMBER1, ADC_SOC_NUMBER0);
ADC_enableInterrupt(ADCB_BASE,ADC_INT_NUMBER1);

In the ADCB ISR:

    measurement = ADC_readPPBResult(ADCBRESULT_BASE, ADC_PPB_NUMBER1);

    ADC_clearInterruptStatus(ADCB_BASE, ADC_INT_NUMBER1);

if(true == ADC_getInterruptOverflowStatus(ADCB_BASE, ADC_INT_NUMBER1))
{
ADC_clearInterruptOverflowStatus(ADCB_BASE, ADC_INT_NUMBER1);
ADC_clearInterruptStatus(ADCB_BASE, ADC_INT_NUMBER1);
}

    Interrupt_clearACKGroup(INTERRUPT_ACK_GROUP1);