LAUNCHXL-F280049C: Instaspin Too High Current Problem in Motor Identification Step

Thank you very much. Finally it worked thanks to you. As far as I understand, unfortunately there is a mistake in example code. Because adc sequence is not correct. This is original adc setup code (in my code, I changed only PGAs with normal ADC inputs):

    // ISENA - PGA5->A14->RA0
    ADC_setupSOC(obj->adcHandle[0], ADC_SOC_NUMBER0, ADC_TRIGGER_EPWM6_SOCA,
                 ADC_CH_ADCIN14, HAL_ADC_SAMPLE_WINDOW);

    // ISENB - PGA3->C7->RC0
    ADC_setupSOC(obj->adcHandle[2], ADC_SOC_NUMBER0, ADC_TRIGGER_EPWM6_SOCA,
                 ADC_CH_ADCIN7, HAL_ADC_SAMPLE_WINDOW);

    // ISENC - PGA1->B7->RB0
    ADC_setupSOC(obj->adcHandle[1], ADC_SOC_NUMBER0, ADC_TRIGGER_EPWM6_SOCA,
                 ADC_CH_ADCIN7, HAL_ADC_SAMPLE_WINDOW);

Code comments A, B, C sequence must be opposite so this mistake effected to adc read operation code:

  // convert phase A current        ->RA0/A14
    value = (float32_t)ADC_readResult(obj->adcResult[0], ADC_SOC_NUMBER0);
    pADCData->I_A.value[0] = value * current_sf;

    // convert phase B current        ->RC0/C7
    value = (float32_t)ADC_readResult(obj->adcResult[2], ADC_SOC_NUMBER0);
    pADCData->I_A.value[1] = value * current_sf;

    // convert phase C current        ->RB0/B7
    value = (float32_t)ADC_readResult(obj->adcResult[1], ADC_SOC_NUMBER0);
    pADCData->I_A.value[2] = value * current_sf;

adcResult[0] and adcResult[1] should be swapped.

Recall pulling hair from roots after PGA's were switched over to analog MUX inputs for external current sensors. I added note comments to the end of each one as to switch back at some time for drv8320rs booster pack. That ADC input issue effects the R/L current in a very bad way.

 // configure the interrupt sources
    // configure the sample window to 15 system clock cycle wide by assigning 14
    // to the ACQPS of ADCSOCxCTL Register.
    // RB2/B1
    ADC_setInterruptSource(obj->adcHandle[1], ADC_INT_NUMBER1, ADC_SOC_NUMBER2);

    // configure the SOCs for hvkit_rev1p1
    // ISENA - PGA5->A14->RA0
    ADC_setupSOC(obj->adcHandle[2], ADC_SOC_NUMBER0, ADC_TRIGGER_EPWM6_SOCA,
                 ADC_CH_ADCIN0, HAL_ADC_SAMPLE_WINDOW);

    // ISENB - PGA3->C7->RC0
    ADC_setupSOC(obj->adcHandle[0], ADC_SOC_NUMBER0, ADC_TRIGGER_EPWM6_SOCA,
                 ADC_CH_ADCIN5, HAL_ADC_SAMPLE_WINDOW);

    // ISENC - PGA1->B7->RB0
    ADC_setupSOC(obj->adcHandle[1], ADC_SOC_NUMBER0, ADC_TRIGGER_EPWM6_SOCA,
                 ADC_CH_ADCIN4, HAL_ADC_SAMPLE_WINDOW);

    // VSENA - A5->RA1
    ADC_setupSOC(obj->adcHandle[2], ADC_SOC_NUMBER1, ADC_TRIGGER_EPWM6_SOCA,
                 ADC_CH_ADCIN2, HAL_ADC_SAMPLE_WINDOW);

    // VSENB - B0->RB1
    ADC_setupSOC(obj->adcHandle[0], ADC_SOC_NUMBER1, ADC_TRIGGER_EPWM6_SOCA,
                 ADC_CH_ADCIN8, HAL_ADC_SAMPLE_WINDOW);

    // VSENC - C2->RC1
    ADC_setupSOC(obj->adcHandle[1], ADC_SOC_NUMBER1, ADC_TRIGGER_EPWM6_SOCA,
                ADC_CH_ADCIN0, HAL_ADC_SAMPLE_WINDOW);

    // VSENVM - B1->RB2. hvkit board has capacitor on Vbus feedback, so
    // the sampling doesn't need to be very long to get an accurate value
    ADC_setupSOC(obj->adcHandle[1], ADC_SOC_NUMBER2, ADC_TRIGGER_EPWM6_SOCA,
                 ADC_CH_ADCIN2, HAL_ADC_SAMPLE_WINDOW);

    float32_t current_sf = -HAL_getCurrentScaleFactor(handle);
    float32_t voltage_sf = HAL_getVoltageScaleFactor(handle);

#if (BOOST_to_LPD == BOOSTX_to_J1_J2)
  // convert phase A current        ->RA0/A14
    value = (float32_t)ADC_readResult(obj->adcResult[1], ADC_SOC_NUMBER0);
    pADCData->I_A.value[0] = value * current_sf;

    // convert phase B current        ->RC0/C7
    value = (float32_t)ADC_readResult(obj->adcResult[0], ADC_SOC_NUMBER0);
    pADCData->I_A.value[1] = value * current_sf;

    // convert phase C current        ->RB0/B7
    value = (float32_t)ADC_readResult(obj->adcResult[2], ADC_SOC_NUMBER0);
    pADCData->I_A.value[2] = value * current_sf;

    // convert phase A voltage        ->RA1/A5
    value = (float32_t)ADC_readResult(obj->adcResult[1], ADC_SOC_NUMBER1);
    pADCData->V_V.value[0] = value * voltage_sf;

    // convert phase B voltage        ->RB1/B0
    value = (float32_t)ADC_readResult(obj->adcResult[0], ADC_SOC_NUMBER1);
    pADCData->V_V.value[1] = value * voltage_sf;

    // convert phase C voltage        ->RC1/C2
    value = (float32_t)ADC_readResult(obj->adcResult[2], ADC_SOC_NUMBER1);
    pADCData->V_V.value[2] = value * voltage_sf;

    // convert dcBus voltage          ->RB2/B1
    value = (float32_t)ADC_readResult(obj->adcResult[1], ADC_SOC_NUMBER2);
    pADCData->dcBus_V = value * voltage_sf;
#endif

Hi, you're solution worked for me too. So I managed Lab04. But in Lab05 I have issues. I think the problem might be with the wrong ADC Input's for the Voltage Sensors. I'm playing around a little bit, but nothing seems to work. Sometimes the Rs calculation ist wrong and shows the smallest possible value and sometimes it is right. But when the programm goes in CONSTSPEED Mode the speedRef_Hz Expression jump to zero and nothing is happen anymore. I have one ADC setting for the Voltage Sensor, where the speedRef_Hz jump to 600 and the motor starts spinning really fast, but then stops.  For hopefully better understanding I insert my code.

Sorry for the long text, maybe you can help me? I don't know what the problem can be.

Hi Jonas,

There was a symbol name missing effecting correct state machine time counts, compiler did not error. So the R/L calculation was running oddly longer than required (fine tune times user.c). Sometimes state machine jumped over steps when watching CCS debug status. Ti may have fixed the missing symbol in later RDK versions.

It may have been _INLINE was missing from predefined symbols, issue was posted in forum.