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器件型号：TMS320F280025C 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);
