[参考译文] TMS320F280025C：ePWM -在通道 B 上生成的信号与在通道 A 上生成的信号相同

https://e2e.ti.com/support/microcontrollers/c2000-microcontrollers-group/c2000/f/c2000-microcontrollers-forum/1132678/tms320f280025c-epwm---generate-the-same-signal-on-channel-b-than-on-channel-a

您好！

我有一个反相栅极驱动器、我想制造 ePWM 模块的通道 A 和通道 B  

输出完全相同的 PWM 信号。

我使用的是通用电机控制项目、但我无法看到、在哪里可以更改通道 B 的极性？

hal.c 中的初始化如下：

//Motor PWM
    for(cnt=0; cnt<3; cnt++)
    {
        // setup the Time-Base Control Register (TBCTL)
        EPWM_setTimeBaseCounterMode(obj->pwmHandle[cnt],
                                    EPWM_COUNTER_MODE_UP_DOWN);

        EPWM_disablePhaseShiftLoad(obj->pwmHandle[cnt]);

        EPWM_setPeriodLoadMode(obj->pwmHandle[cnt], EPWM_PERIOD_DIRECT_LOAD);

        EPWM_enableSyncOutPulseSource(obj->pwmHandle[cnt],
                                      EPWM_SYNC_OUT_PULSE_ON_SOFTWARE);

        EPWM_setClockPrescaler(obj->pwmHandle[cnt], EPWM_CLOCK_DIVIDER_1,
                                 EPWM_HSCLOCK_DIVIDER_1);

        EPWM_setCountModeAfterSync(obj->pwmHandle[cnt],
                                   EPWM_COUNT_MODE_UP_AFTER_SYNC);

        EPWM_setEmulationMode(obj->pwmHandle[cnt], EPWM_EMULATION_FREE_RUN);

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

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

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

        // setup the Counter-Compare Control Register (CMPCTL)
        EPWM_setCounterCompareShadowLoadMode(obj->pwmHandle[cnt],
                                             EPWM_COUNTER_COMPARE_A,
                                             EPWM_COMP_LOAD_ON_CNTR_ZERO);

        EPWM_setCounterCompareShadowLoadMode(obj->pwmHandle[cnt],
                                             EPWM_COUNTER_COMPARE_B,
                                             EPWM_COMP_LOAD_ON_CNTR_ZERO);

        EPWM_setCounterCompareShadowLoadMode(obj->pwmHandle[cnt],
                                             EPWM_COUNTER_COMPARE_C,
                                             EPWM_COMP_LOAD_ON_CNTR_ZERO);

        EPWM_setCounterCompareShadowLoadMode(obj->pwmHandle[cnt],
                                             EPWM_COUNTER_COMPARE_D,
                                             EPWM_COMP_LOAD_ON_CNTR_ZERO);


        // setup the Action-Qualifier Output A Register (AQCTLA)
        EPWM_setActionQualifierAction(obj->pwmHandle[cnt],
                                      EPWM_AQ_OUTPUT_A,
                                      EPWM_AQ_OUTPUT_HIGH,
                                      EPWM_AQ_OUTPUT_ON_TIMEBASE_UP_CMPA);

        EPWM_setActionQualifierAction(obj->pwmHandle[cnt],
                                      EPWM_AQ_OUTPUT_A,
                                      EPWM_AQ_OUTPUT_HIGH,
                                      EPWM_AQ_OUTPUT_ON_TIMEBASE_PERIOD);

        EPWM_setActionQualifierAction(obj->pwmHandle[cnt],
                                      EPWM_AQ_OUTPUT_A,
                                      EPWM_AQ_OUTPUT_LOW,
                                      EPWM_AQ_OUTPUT_ON_TIMEBASE_DOWN_CMPA);

        EPWM_setActionQualifierAction(obj->pwmHandle[cnt],
                                      EPWM_AQ_OUTPUT_A,
                                      EPWM_AQ_OUTPUT_LOW,
                                      EPWM_AQ_OUTPUT_ON_TIMEBASE_ZERO);


        // setup the Dead-Band Generator Control Register (DBCTL)
        EPWM_setDeadBandDelayMode(obj->pwmHandle[cnt], EPWM_DB_RED, true);
        EPWM_setDeadBandDelayMode(obj->pwmHandle[cnt], EPWM_DB_FED, true);

        // select EPWMA as the input to the dead band generator
        EPWM_setRisingEdgeDeadBandDelayInput(obj->pwmHandle[cnt],
                                             EPWM_DB_INPUT_EPWMA);

        // configure the right polarity for active high complementary config.
        EPWM_setDeadBandDelayPolarity(obj->pwmHandle[cnt],
                                      EPWM_DB_RED,
                                      EPWM_DB_POLARITY_ACTIVE_HIGH);
        EPWM_setDeadBandDelayPolarity(obj->pwmHandle[cnt],
                                      EPWM_DB_FED,
                                      EPWM_DB_POLARITY_ACTIVE_LOW);

        // setup the Dead-Band Rising Edge Delay Register (DBRED)
        EPWM_setRisingEdgeDelayCount(obj->pwmHandle[cnt], MTR1_PWM_DBRED_CNT);

        // setup the Dead-Band Falling Edge Delay Register (DBFED)
        EPWM_setFallingEdgeDelayCount(obj->pwmHandle[cnt], MTR1_PWM_DBFED_CNT);


        // setup the PWM-Chopper Control Register (PCCTL)
        EPWM_disableChopper(obj->pwmHandle[cnt]);

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

    // BSXL8323RS_REVA || BSXL8323RH_REVB || \
    // BSXL8353RS_REVA || BSXL8316RT_REVA || \
    // BSXL3PHGAN_REVA || HVMTRPFC_REV1P1
#else
#error The PWM is not configured for motor_1 control
#endif  // boards


    // setup the Event Trigger Selection Register (ETSEL)
    EPWM_setInterruptSource(obj->pwmHandle[0], EPWM_INT_TBCTR_ZERO);

    EPWM_enableInterrupt(obj->pwmHandle[0]);

    EPWM_setADCTriggerSource(obj->pwmHandle[0],
                             EPWM_SOC_A, EPWM_SOC_TBCTR_D_CMPC);

    EPWM_enableADCTrigger(obj->pwmHandle[0], EPWM_SOC_A);


    // setup the Event Trigger Prescale Register (ETPS)
    if(numPWMTicksPerISRTick > 15)
    {
        EPWM_setInterruptEventCount(obj->pwmHandle[0], 15);

        EPWM_setADCTriggerEventPrescale(obj->pwmHandle[0], EPWM_SOC_A, 15);
        EPWM_setADCTriggerEventPrescale(obj->pwmHandle[0], EPWM_SOC_B, 15);

    }
    else if(numPWMTicksPerISRTick < 1)
    {
        EPWM_setInterruptEventCount(obj->pwmHandle[0], 1);

        EPWM_setADCTriggerEventPrescale(obj->pwmHandle[0], EPWM_SOC_A, 1);
        EPWM_setADCTriggerEventPrescale(obj->pwmHandle[0], EPWM_SOC_B, 1);

    }
    else
    {
        EPWM_setInterruptEventCount(obj->pwmHandle[0], numPWMTicksPerISRTick);

        EPWM_setADCTriggerEventPrescale(obj->pwmHandle[0], EPWM_SOC_A,
                                        numPWMTicksPerISRTick);
        EPWM_setADCTriggerEventPrescale(obj->pwmHandle[0], EPWM_SOC_B,
                                        numPWMTicksPerISRTick);

    }

    // setup the Event Trigger Clear Register (ETCLR)
    EPWM_clearEventTriggerInterruptFlag(obj->pwmHandle[0]);
    EPWM_clearADCTriggerFlag(obj->pwmHandle[0], EPWM_SOC_A);
    EPWM_clearADCTriggerFlag(obj->pwmHandle[0], EPWM_SOC_B);

    // since the PWM is configured as an up/down counter, the period register is
    // set to one-half of the desired PWM period
    EPWM_setTimeBasePeriod(obj->pwmHandle[0], pwmPeriodCycles);
    EPWM_setTimeBasePeriod(obj->pwmHandle[1], pwmPeriodCycles);
    EPWM_setTimeBasePeriod(obj->pwmHandle[2], pwmPeriodCycles);

    // write the PWM data value  for ADC trigger
    EPWM_setCounterCompareValue(obj->pwmHandle[0], EPWM_COUNTER_COMPARE_C, 10);

    // write the PWM data value  for ADC trigger


    // enable the ePWM module time base clock sync signal
    SysCtl_enablePeripheral(SYSCTL_PERIPH_CLK_TBCLKSYNC);