[参考译文] TMS320F28.0049万：EPWMB的计数问题

Luis，

我已将您的帖子分配给主题专家，但由于美国假期，请期待我们在星期一结束前回复您。

最佳，
Matthew

这应该是由于行动的优先次序。 您能否查看TRM中的表格，了解具有不同优先级的操作。

或者，您可以将 ePWM_AQ_OUTPT_ON_TIMEBASE _ZERO和 ePWM_AQ_OUTPT_ON_TIMEBASE _句 点的所有操作设置为
不执行任何操作选项。

您好，Nima：

感谢您的回复，但这不能解决问题：

    // ePWMA High when TBCTR=0
    EPWM_setActionQualifierAction(EPWM_BASE[pwm], EPWM_AQ_OUTPUT_A,
     EPWM_AQ_OUTPUT_HIGH, EPWM_AQ_OUTPUT_ON_TIMEBASE_ZERO);

    // ePWMA Low when up count TBCTR=CMPA
    EPWM_setActionQualifierAction(EPWM_BASE[pwm], EPWM_AQ_OUTPUT_A,
     EPWM_AQ_OUTPUT_LOW, EPWM_AQ_OUTPUT_ON_TIMEBASE_UP_CMPA);

    // ePWMA High when down count TBCTR=CMPA
    EPWM_setActionQualifierAction(EPWM_BASE[pwm], EPWM_AQ_OUTPUT_A,
     EPWM_AQ_OUTPUT_HIGH, EPWM_AQ_OUTPUT_ON_TIMEBASE_DOWN_CMPA);

    // ePWMB Low when TBCTR=0
    EPWM_setActionQualifierAction(EPWM_BASE[pwm], EPWM_AQ_OUTPUT_B,
     EPWM_AQ_OUTPUT_LOW, EPWM_AQ_OUTPUT_ON_TIMEBASE_ZERO);

    // ePWMB High when up count TBCTR=CMPA
    EPWM_setActionQualifierAction(EPWM_BASE[pwm], EPWM_AQ_OUTPUT_B,
     EPWM_AQ_OUTPUT_HIGH, EPWM_AQ_OUTPUT_ON_TIMEBASE_UP_CMPA);

    // ePWMB Low when down count TBCTR=CMPA
    EPWM_setActionQualifierAction(EPWM_BASE[pwm], EPWM_AQ_OUTPUT_B,
     EPWM_AQ_OUTPUT_LOW, EPWM_AQ_OUTPUT_ON_TIMEBASE_DOWN_CMPA);

    ///////////// check this out!!!!! if this helps!!!
    // ePWMB Low when down count TBCTR=PERIOD
    EPWM_setActionQualifierAction(EPWM_BASE[pwm], EPWM_AQ_OUTPUT_B,
      EPWM_AQ_OUTPUT_LOW, EPWM_AQ_OUTPUT_ON_TIMEBASE_PERIOD);

我不´m它能是什么…… ´s，虽然我一直在考虑“死时间”，但这一数值比规定的要高，所以没有。

谢谢！

巴西，

路易斯

抱歉，我很失望。

你是不是想这样？

    // ePWMA NO CHANGE when TBCTR=0
    EPWM_setActionQualifierAction(EPWM_BASE[pwm], EPWM_AQ_OUTPUT_A,
      EPWM_AQ_OUTPUT_NO_CHANGE, EPWM_AQ_OUTPUT_ON_TIMEBASE_ZERO);

    // ePWMA Low when up count TBCTR=CMPA
    EPWM_setActionQualifierAction(EPWM_BASE[pwm], EPWM_AQ_OUTPUT_A,
     EPWM_AQ_OUTPUT_LOW, EPWM_AQ_OUTPUT_ON_TIMEBASE_UP_CMPA);

    // ePWMA High when down count TBCTR=CMPA
    EPWM_setActionQualifierAction(EPWM_BASE[pwm], EPWM_AQ_OUTPUT_A,
     EPWM_AQ_OUTPUT_HIGH, EPWM_AQ_OUTPUT_ON_TIMEBASE_DOWN_CMPA);

    // ePWMB NO CHANGE when TBCTR=0
    EPWM_setActionQualifierAction(EPWM_BASE[pwm], EPWM_AQ_OUTPUT_B,
      EPWM_AQ_OUTPUT_NO_CHANGE, EPWM_AQ_OUTPUT_ON_TIMEBASE_ZERO);

    // ePWMB High when up count TBCTR=CMPA
    EPWM_setActionQualifierAction(EPWM_BASE[pwm], EPWM_AQ_OUTPUT_B,
     EPWM_AQ_OUTPUT_HIGH, EPWM_AQ_OUTPUT_ON_TIMEBASE_UP_CMPA);

    // ePWMB Low when down count TBCTR=CMPA
    EPWM_setActionQualifierAction(EPWM_BASE[pwm], EPWM_AQ_OUTPUT_B,
     EPWM_AQ_OUTPUT_LOW, EPWM_AQ_OUTPUT_ON_TIMEBASE_DOWN_CMPA);

    // ePWMB NO CHANGE when down count TBCTR=PERIOD
    EPWM_setActionQualifierAction(EPWM_BASE[pwm], EPWM_AQ_OUTPUT_B,
      EPWM_AQ_OUTPUT_NO_CHANGE, EPWM_AQ_OUTPUT_ON_TIMEBASE_PERIOD);

我会在周一来这里试试的:)  

谢谢

是的！ 试试吧！

NIMA

另外，如果您有C2000Ware 4.01 ，请使用sysconfig工具！

www.ti.com/.../spracx3.pdf

很抱歉，但问题仍然存在...  

是否可以尝试将OUTPT_A的CMBB操作设置为无更改，反之亦然？

NIMA

您好Nima：

我正在进行几次测试，然后我意识到问题是我使用HRPWM模块，而不是使用正常的ePWM ...

  // Calibrate MEP_ScaleFactor
  do {
      sfoStatus = SFO();
  } while(sfoStatus == SFO_INCOMPLETE);

  //#MEP steps per coarse step at 180ps(10n/180ps) MEP_scaleFactor=55
  HRPWM_setMEPStep(base, MEP_ScaleFactor);

  // HRCAL uses the EPWM1 clock
  SysCtl_enablePeripheral(SYSCTL_PERIPH_CLK_EPWM1);

  // Turn off high-resolution period control, as we do only duty control.
  HRPWM_disablePhaseShiftLoad(base); //--> Enable this for Phase shift load (DAB)

  HRPWM_setMEPControlMode(base, HRPWM_CHANNEL_A,
    HRPWM_MEP_DUTY_PERIOD_CTRL);
  // MEP control on both edges. For channel A
  HRPWM_setMEPEdgeSelect(base, HRPWM_CHANNEL_A,
    HRPWM_MEP_CTRL_RISING_AND_FALLING_EDGE);
  HRPWM_setCounterCompareShadowLoadEvent(base,
    HRPWM_CHANNEL_A, HRPWM_LOAD_ON_CNTR_ZERO_PERIOD);

  //Setting of comparator, phase and deadband HR-modes
  HRPWM_setCounterCompareValue(base, HRPWM_COUNTER_COMPARE_A, 0);

  HRPWM_enableAutoConversion(base);

  HRPWM_enablePeriodControl(base); //-->Enable this for Duty cycle load (Buck/AC/DC)

  //synchronization pulse input
  HRPWM_setSyncPulseSource(base, HRPWM_PWMSYNC_SOURCE_ZERO);

当我以这种方式初始化HRPWM时，我就遇到了这个问题...

您是否正在使用SFO库？

您好，  

是的，我´m使用它。