请教TI工程师28069F芯片AD的问题

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Jianwei,

你自己做的板子，AD通道是否改了？需要在AD初始化中相应更改通道。

AD通道都改过了，显示好像第一次转换了，然后就不再转换更新

跟编译器的版本有关系吗，编译时有个警示需要6.2.3的版本，我用的CCS5.5，编译器是6.2.0的

还有就是gMotorVars.Flag_enableSys标志不使能的情况下，AD是否持续转换？

你好Martin Yu

今天又调试了一下，上面显示的AD值不是实际转换的值，是I_bias校正偏移的值（附图），这就是说程序里AD转换并没有启动，请问应该是哪儿的问题

而且用示波器看到有PWM输出，但也是个固定值，没有持续更新。

建议检查下你的ADC中断的触发源是否有相应改变：

 // configure the interrupt sources
  ADC_disableInt(obj->adcHandle,ADC_IntNumber_1);
  ADC_setIntMode(obj->adcHandle,ADC_IntNumber_1,ADC_IntMode_ClearFlag);
  ADC_setIntSrc(obj->adcHandle,ADC_IntNumber_1,ADC_IntSrc_EOC7);

Jianwei，

你用哪个lab程序试的？建议用lab3a不带电机，先试下offset计算，一般电流的三个值一样，在0.9~1.05左右，电压三个值一样，220V输入则为0.38左右，则证明是正常的；按照你的截图，说明ADC采样不对，具体是软件还是硬件，需要排查，先检查ADC和PWM的初始化程序和user.h的设置。

你是哪的客户？可以联系当地的代理商或TI的FAE帮忙。

Martin Yu ,非常感谢你的解答

我用的是lab10C程序，硬件是按照TI文档介绍的，进AD的信号都对，软件里面AD和PWM初始化都没有动，只改了相应的IO口和AD通道，

按你说的我用lab3a调试了一下，电流电压AD转换还是没有值，只显示减去偏移后的值，但和用运行的值不一样，电流和电压的偏移都一至。

只有dcBus的值在变，从寄存器中也只看到通道7的值在变，但和实际值相差很远，应该也不是真实值。见下图

Jianwei,

lab3a跑出来的值不对的，应该还是ADC和PWM的配置方面。你把这部分的原理图截图和配置代码发上来看看。你是哪里的，最好联系支持贵司的代理商的FAE现场帮你看看，这样效率高些。

Martin Yu 你好，

我的电压采样对技术文档差不多，电阻降压后经过运放，850V输出3.3V，正常输入是380V。母线就是540V。测量板子上母线电压输入到芯片引脚是1.805V

三相输出电压到芯片引脚是0V，电流采样用的霍尔传感器正负4V出0－3.3V。现在无电流时进芯片是1.65V。ADC和PWM改动较少，主要是通道，寄存器配置没怎么动。修改了几个地方做有注示，用lab03试验时PWM波形很正常，会连续变动，主要还是看不到AD转的值。

void HAL_setupAdcs(HAL_Handle handle)
{
  HAL_Obj *obj = (HAL_Obj *)handle;

  // disable the ADCs
  ADC_disable(obj->adcHandle);

  // power up the bandgap circuit
  ADC_enableBandGap(obj->adcHandle);

  // set the ADC voltage reference source to internal
  ADC_setVoltRefSrc(obj->adcHandle,ADC_VoltageRefSrc_Int);

  // enable the ADC reference buffers
  ADC_enableRefBuffers(obj->adcHandle);

  // Set main clock scaling factor (max45MHz clock for the ADC module)
  ADC_setDivideSelect(obj->adcHandle,ADC_DivideSelect_ClkIn_by_2);

  // power up the ADCs
  ADC_powerUp(obj->adcHandle);

  // enable the ADCs
  ADC_enable(obj->adcHandle);

  // set the ADC interrupt pulse generation to prior
  ADC_setIntPulseGenMode(obj->adcHandle,ADC_IntPulseGenMode_Prior);

  // set the temperature sensor source to external
  ADC_setTempSensorSrc(obj->adcHandle,ADC_TempSensorSrc_Ext);

  // configure the interrupt sources
  ADC_disableInt(obj->adcHandle,ADC_IntNumber_1);
  ADC_setIntMode(obj->adcHandle,ADC_IntNumber_1,ADC_IntMode_ClearFlag);
  ADC_setIntSrc(obj->adcHandle,ADC_IntNumber_1,ADC_IntSrc_EOC7);

  //configure the SOCs for hvkit_rev1p1
  // EXT IA-FB
  //ADC_setSocChanNumber(obj->adcHandle,ADC_SocNumber_0,ADC_SocChanNumber_A1);
  ADC_setSocChanNumber(obj->adcHandle,ADC_SocNumber_0,ADC_SocChanNumber_A0);  //changed by xjw
  ADC_setSocTrigSrc(obj->adcHandle,ADC_SocNumber_0,ADC_SocTrigSrc_EPWM1_ADCSOCA);
  ADC_setSocSampleDelay(obj->adcHandle,ADC_SocNumber_0,ADC_SocSampleDelay_9_cycles);

  // EXT IA-FB
  // Duplicate conversion due to ADC Initial Conversion bug (SPRZ342)
  //ADC_setSocChanNumber(obj->adcHandle,ADC_SocNumber_1,ADC_SocChanNumber_A1);
  ADC_setSocChanNumber(obj->adcHandle,ADC_SocNumber_1,ADC_SocChanNumber_A0);  //changed by xjw IA=ADCA0
  ADC_setSocTrigSrc(obj->adcHandle,ADC_SocNumber_1,ADC_SocTrigSrc_EPWM1_ADCSOCA);
  ADC_setSocSampleDelay(obj->adcHandle,ADC_SocNumber_1,ADC_SocSampleDelay_9_cycles);

  // EXT IB-FB
  //ADC_setSocChanNumber(obj->adcHandle,ADC_SocNumber_2,ADC_SocChanNumber_B1);
  ADC_setSocChanNumber(obj->adcHandle,ADC_SocNumber_2,ADC_SocChanNumber_A1);  //changed by xjw IB=ADCA1
  ADC_setSocTrigSrc(obj->adcHandle,ADC_SocNumber_2,ADC_SocTrigSrc_EPWM1_ADCSOCA);
  ADC_setSocSampleDelay(obj->adcHandle,ADC_SocNumber_2,ADC_SocSampleDelay_9_cycles);

  // EXT IC-FB
  //ADC_setSocChanNumber(obj->adcHandle,ADC_SocNumber_3,ADC_SocChanNumber_A3);
  ADC_setSocChanNumber(obj->adcHandle,ADC_SocNumber_3,ADC_SocChanNumber_A2);  //changed by xjw IC=ADCA2
  ADC_setSocTrigSrc(obj->adcHandle,ADC_SocNumber_3,ADC_SocTrigSrc_EPWM1_ADCSOCA);
  ADC_setSocSampleDelay(obj->adcHandle,ADC_SocNumber_3,ADC_SocSampleDelay_9_cycles);

  // ADC-Vhb1
  //ADC_setSocChanNumber(obj->adcHandle,ADC_SocNumber_4,ADC_SocChanNumber_B7);
  ADC_setSocChanNumber(obj->adcHandle,ADC_SocNumber_4,ADC_SocChanNumber_A4);  //changed by xjw UA=ADCA4
  ADC_setSocTrigSrc(obj->adcHandle,ADC_SocNumber_4,ADC_SocTrigSrc_EPWM1_ADCSOCA);
  ADC_setSocSampleDelay(obj->adcHandle,ADC_SocNumber_4,ADC_SocSampleDelay_9_cycles);

  // ADC-Vhb2
  //ADC_setSocChanNumber(obj->adcHandle,ADC_SocNumber_5,ADC_SocChanNumber_B6);
  ADC_setSocChanNumber(obj->adcHandle,ADC_SocNumber_5,ADC_SocChanNumber_A5);  //changed by xjw UB=ADCA5
  ADC_setSocTrigSrc(obj->adcHandle,ADC_SocNumber_5,ADC_SocTrigSrc_EPWM1_ADCSOCA);
  ADC_setSocSampleDelay(obj->adcHandle,ADC_SocNumber_5,ADC_SocSampleDelay_9_cycles);

  // ADC-Vhb3
  //ADC_setSocChanNumber(obj->adcHandle,ADC_SocNumber_6,ADC_SocChanNumber_B4);
  ADC_setSocChanNumber(obj->adcHandle,ADC_SocNumber_6,ADC_SocChanNumber_A6);  //changed by xjw UC=ADCA6
  ADC_setSocTrigSrc(obj->adcHandle,ADC_SocNumber_6,ADC_SocTrigSrc_EPWM1_ADCSOCA);
  ADC_setSocSampleDelay(obj->adcHandle,ADC_SocNumber_6,ADC_SocSampleDelay_9_cycles);

  // VDCBUS
  //ADC_setSocChanNumber(obj->adcHandle,ADC_SocNumber_7,ADC_SocChanNumber_A7);
  ADC_setSocChanNumber(obj->adcHandle,ADC_SocNumber_7,ADC_SocChanNumber_A3);  //changed by xjw UDCBUS=ADCA3
  ADC_setSocTrigSrc(obj->adcHandle,ADC_SocNumber_7,ADC_SocTrigSrc_EPWM1_ADCSOCA);
  ADC_setSocSampleDelay(obj->adcHandle,ADC_SocNumber_7,ADC_SocSampleDelay_9_cycles);

  return;
} // end of HAL_setupAdcs() function

void HAL_setupPwms(HAL_Handle handle,
                   const uint_least16_t systemFreq_MHz,
                   const float_t pwmPeriod_usec,
                   const uint_least16_t numPwmTicksPerIsrTick)
{
  HAL_Obj   *obj = (HAL_Obj *)handle;
  uint16_t   halfPeriod_cycles = (uint16_t)((float_t)systemFreq_MHz*pwmPeriod_usec) >> 1;
  uint_least8_t    cnt;

  // turns off the outputs of the EPWM peripherals which will put the power switches
  // into a high impedance state.
  PWM_setOneShotTrip(obj->pwmHandle[PWM_Number_1]);
  PWM_setOneShotTrip(obj->pwmHandle[PWM_Number_2]);
  PWM_setOneShotTrip(obj->pwmHandle[PWM_Number_3]);

  for(cnt=0;cnt<3;cnt++)
    {
      // setup the Time-Base Control Register (TBCTL)
      PWM_setCounterMode(obj->pwmHandle[cnt],PWM_CounterMode_UpDown);
      PWM_disableCounterLoad(obj->pwmHandle[cnt]);
      PWM_setPeriodLoad(obj->pwmHandle[cnt],PWM_PeriodLoad_Immediate);
      PWM_setSyncMode(obj->pwmHandle[cnt],PWM_SyncMode_EPWMxSYNC);
      PWM_setHighSpeedClkDiv(obj->pwmHandle[cnt],PWM_HspClkDiv_by_1);
      PWM_setClkDiv(obj->pwmHandle[cnt],PWM_ClkDiv_by_1);
      PWM_setPhaseDir(obj->pwmHandle[cnt],PWM_PhaseDir_CountUp);
      PWM_setRunMode(obj->pwmHandle[cnt],PWM_RunMode_FreeRun);

      // setup the Timer-Based Phase Register (TBPHS)
      PWM_setPhase(obj->pwmHandle[cnt],0);

      // setup the Time-Base Counter Register (TBCTR)
      PWM_setCount(obj->pwmHandle[cnt],0);

      // setup the Time-Base Period Register (TBPRD)
      // set to zero initially
      PWM_setPeriod(obj->pwmHandle[cnt],0);

      // setup the Counter-Compare Control Register (CMPCTL)
      PWM_setLoadMode_CmpA(obj->pwmHandle[cnt],PWM_LoadMode_Zero);
      PWM_setLoadMode_CmpB(obj->pwmHandle[cnt],PWM_LoadMode_Zero);
      PWM_setShadowMode_CmpA(obj->pwmHandle[cnt],PWM_ShadowMode_Shadow);
      PWM_setShadowMode_CmpB(obj->pwmHandle[cnt],PWM_ShadowMode_Immediate);

      // setup the Action-Qualifier Output A Register (AQCTLA)
      PWM_setActionQual_CntUp_CmpA_PwmA(obj->pwmHandle[cnt],PWM_ActionQual_Set);
      PWM_setActionQual_CntDown_CmpA_PwmA(obj->pwmHandle[cnt],PWM_ActionQual_Clear);

      // setup the Dead-Band Generator Control Register (DBCTL)
      PWM_setDeadBandOutputMode(obj->pwmHandle[cnt],PWM_DeadBandOutputMode_EPWMxA_Rising_EPWMxB_Falling);
//      PWM_setDeadBandPolarity(obj->pwmHandle[cnt],PWM_DeadBandPolarity_EPWMxB_Inverted);
      PWM_setDeadBandPolarity(obj->pwmHandle[cnt],PWM_DeadBandPolarity_EPWMxA_Inverted); //changed by xjw

      // setup the Dead-Band Rising Edge Delay Register (DBRED)
      PWM_setDeadBandRisingEdgeDelay(obj->pwmHandle[cnt],HAL_PWM_DBRED_CNT);

      // setup the Dead-Band Falling Edge Delay Register (DBFED)
      PWM_setDeadBandFallingEdgeDelay(obj->pwmHandle[cnt],HAL_PWM_DBFED_CNT);
      // setup the PWM-Chopper Control Register (PCCTL)
      PWM_disableChopping(obj->pwmHandle[cnt]);

      // setup the Trip Zone Select Register (TZSEL)
      PWM_disableTripZones(obj->pwmHandle[cnt]);
    }

  // setup the Event Trigger Selection Register (ETSEL)
  PWM_disableInt(obj->pwmHandle[PWM_Number_1]);
  PWM_setSocAPulseSrc(obj->pwmHandle[PWM_Number_1],PWM_SocPulseSrc_CounterEqualZero);
  PWM_enableSocAPulse(obj->pwmHandle[PWM_Number_1]);
 

  // setup the Event Trigger Prescale Register (ETPS)
  if(numPwmTicksPerIsrTick == 3)
    {
      PWM_setIntPeriod(obj->pwmHandle[PWM_Number_1],PWM_IntPeriod_ThirdEvent);
      PWM_setSocAPeriod(obj->pwmHandle[PWM_Number_1],PWM_SocPeriod_ThirdEvent);
    }
  else if(numPwmTicksPerIsrTick == 2)
    {
      PWM_setIntPeriod(obj->pwmHandle[PWM_Number_1],PWM_IntPeriod_SecondEvent);
      PWM_setSocAPeriod(obj->pwmHandle[PWM_Number_1],PWM_SocPeriod_SecondEvent);
    }
  else
    {
      PWM_setIntPeriod(obj->pwmHandle[PWM_Number_1],PWM_IntPeriod_FirstEvent);
      PWM_setSocAPeriod(obj->pwmHandle[PWM_Number_1],PWM_SocPeriod_FirstEvent);
    }

  // setup the Event Trigger Clear Register (ETCLR)
  PWM_clearIntFlag(obj->pwmHandle[PWM_Number_1]);
  PWM_clearSocAFlag(obj->pwmHandle[PWM_Number_1]);

  // first step to synchronize the pwms
  CLK_disableTbClockSync(obj->clkHandle);

  // since the PWM is configured as an up/down counter, the period register is set to one-half
  // of the desired PWM period
  PWM_setPeriod(obj->pwmHandle[PWM_Number_1],halfPeriod_cycles);
  PWM_setPeriod(obj->pwmHandle[PWM_Number_2],halfPeriod_cycles);
  PWM_setPeriod(obj->pwmHandle[PWM_Number_3],halfPeriod_cycles);

  // last step to synchronize the pwms
  CLK_enableTbClockSync(obj->clkHandle);

  return;
}  // end of HAL_setupPwms() function