TMS320F280049C: 采用CMPSS 设置跳闸条件进入EPWM3 TZ中断和EPWM4 TZ中断，采用同一个跳闸条件中断触发源，EPWM3能正常发波，而EPWM4不能发波。

丘球球QYG

Part Number: TMS320F280049C

28049C 采用CMPSS 设置跳闸条件进入EPWM3 TZ中断和EPWM4 TZ中断，采用同一个CMPSS跳闸条件中断触发源，EPWM3能正常发波，而EPWM4不能发波，包括以下2个问题：

（1）进入EPWM3 TZ和EPWM4 TZ中断的频率不同，中断时间均为510ns左右。进入EPWM3 TZ中断频率约为88kHz，而EPWM4 TZ中断频率约为1.28MHz，包括变量定义、声明、Main.c主函数、CMPSS、ADC等配置完全一样，且EPWM3和EPWM4配置过程也完全一样，而输出结果却不同。

__interrupt void epwm3TZISR(void)
{
    GpioDataRegs.GPASET.bit.GPIO11=1;
    Flag2++;
    compAValue = 2*HWREGH(EPWM3_BASE + EPWM_O_TBCTR)-70;

    f_PRD[0]=0.0001*compAValue+0.9999*f_PRD[1];
    f_PRD[1]=f_PRD[0];

    HWREGH(EPWM3_BASE + EPWM_O_TBPRD) = f_PRD[0];
    CMPSS_setMaxRampValue(CMPSS4_BASE, Ref);

    // Clear INT flag for this timer
    EALLOW;
    HWREGH(EPWM3_BASE + EPWM_O_TZCLR) |= (EPWM_TZ_FLAG_DCAEVT1|EPWM_TZ_INTERRUPT);
    EDIS;
    // Acknowledge interrupt group
    HWREGH(PIECTRL_BASE + PIE_O_ACK) = INTERRUPT_ACK_GROUP2;
    GpioDataRegs.GPACLEAR.bit.GPIO11=1;

}

__interrupt void epwm4TZISR(void)
{
    GpioDataRegs.GPASET.bit.GPIO11=1;
    Flag2++;
    compAValue = 2*HWREGH(EPWM4_BASE + EPWM_O_TBCTR)-70;

    f_PRD[0]=0.0001*compAValue+0.9999*f_PRD[1];
    f_PRD[1]=f_PRD[0];

    HWREGH(EPWM4_BASE + EPWM_O_TBPRD) = f_PRD[0];
    CMPSS_setMaxRampValue(CMPSS4_BASE, Ref);

    // Clear INT flag for this timer
    EALLOW;
    HWREGH(EPWM4_BASE + EPWM_O_TZCLR) |= (EPWM_TZ_FLAG_DCAEVT1|EPWM_TZ_INTERRUPT);
    EDIS;
    // Acknowledge interrupt group
    HWREGH(PIECTRL_BASE + PIE_O_ACK) = INTERRUPT_ACK_GROUP2;
    GpioDataRegs.GPACLEAR.bit.GPIO11=1;
}

void initEPWM3()
{
    EPWM_selectDigitalCompareTripInput(EPWM3_BASE, EPWM_DC_TRIP_TRIPIN7, EPWM_DC_TYPE_DCAH);

    EPWM_setTripZoneDigitalCompareEventCondition(EPWM3_BASE, EPWM_TZ_DC_OUTPUT_A1, EPWM_TZ_EVENT_DCXH_HIGH);

    EPWM_setDigitalCompareEventSource(
            EPWM3_BASE, EPWM_DC_MODULE_A, EPWM_DC_EVENT_1, EPWM_DC_EVENT_SOURCE_ORIG_SIGNAL);

    EPWM_setDigitalCompareEventSyncMode(
            EPWM3_BASE, EPWM_DC_MODULE_A, EPWM_DC_EVENT_1, EPWM_DC_EVENT_INPUT_SYNCED);

    EPWM_setActionQualifierT1TriggerSource(EPWM3_BASE, EPWM_AQ_TRIGGER_EVENT_TRIG_DCA_1);

    EPWM_enableTripZoneInterrupt(EPWM3_BASE, EPWM_TZ_INTERRUPT_DCAEVT1);

    EPWM_setTripZoneAction(EPWM3_BASE, EPWM_TZ_ACTION_EVENT_DCAEVT1,
                           EPWM_TZ_ACTION_DISABLE);

    EPWM_setPeriodLoadMode(EPWM3_BASE, EPWM_PERIOD_DIRECT_LOAD);

    EPWM_setTimeBasePeriod(EPWM3_BASE,0xFFFF);
    EPWM_setPhaseShift(EPWM3_BASE, 0U);
    EPWM_setTimeBaseCounter(EPWM3_BASE, 0U);

    EPWM_setPeriodLoadMode(EPWM3_BASE, EPWM_PERIOD_DIRECT_LOAD);

    EPWM_setTimeBaseCounterMode(EPWM3_BASE, EPWM_COUNTER_MODE_UP);
    EPWM_disablePhaseShiftLoad(EPWM3_BASE);
    EPWM_setClockPrescaler(EPWM3_BASE,
                              EPWM_CLOCK_DIVIDER_1,
                              EPWM_HSCLOCK_DIVIDER_1);

    EPWM_setActionQualifierAction(EPWM3_BASE,
                                         EPWM_AQ_OUTPUT_A,
                                         EPWM_AQ_OUTPUT_HIGH,
                                         EPWM_AQ_OUTPUT_ON_TIMEBASE_ZERO);
    EPWM_setActionQualifierAction(EPWM3_BASE,
                                         EPWM_AQ_OUTPUT_A,
                                         EPWM_AQ_OUTPUT_LOW,
                                         EPWM_AQ_OUTPUT_ON_T1_COUNT_UP);
    EPWM_setActionQualifierAction(EPWM3_BASE,
                                         EPWM_AQ_OUTPUT_B,
                                         EPWM_AQ_OUTPUT_HIGH,
                                         EPWM_AQ_OUTPUT_ON_TIMEBASE_ZERO);
    EPWM_setActionQualifierAction(EPWM3_BASE,
                                         EPWM_AQ_OUTPUT_B,
                                         EPWM_AQ_OUTPUT_LOW,
                                         EPWM_AQ_OUTPUT_ON_T1_COUNT_UP);


    EPWM_setDeadBandCounterClock(EPWM3_BASE,EPWM_DB_COUNTER_CLOCK_HALF_CYCLE);
    EPWM_setRisingEdgeDelayCount(EPWM3_BASE,pwm_db_ticks_hs);
    EPWM_setFallingEdgeDelayCount(EPWM3_BASE,pwm_db_ticks_ls);

    EPWM_setDeadBandDelayMode(EPWM3_BASE,EPWM_DB_RED,true);
    EPWM_setDeadBandDelayMode(EPWM3_BASE,EPWM_DB_FED,true);
    EPWM_setRisingEdgeDeadBandDelayInput(EPWM3_BASE,EPWM_DB_INPUT_EPWMA);
    EPWM_setFallingEdgeDeadBandDelayInput(EPWM3_BASE,EPWM_DB_INPUT_EPWMB);
    EPWM_setDeadBandDelayPolarity(EPWM3_BASE,EPWM_DB_RED,
                                         EPWM_DB_POLARITY_ACTIVE_HIGH);

    EPWM_setDeadBandDelayPolarity(EPWM3_BASE,EPWM_DB_FED,
                                         EPWM_DB_POLARITY_ACTIVE_LOW);
}

void initEPWM4()
{
    EPWM_selectDigitalCompareTripInput(EPWM4_BASE, EPWM_DC_TRIP_TRIPIN7, EPWM_DC_TYPE_DCAH);

    EPWM_setTripZoneDigitalCompareEventCondition(EPWM4_BASE, EPWM_TZ_DC_OUTPUT_A1, EPWM_TZ_EVENT_DCXH_HIGH);

    EPWM_setDigitalCompareEventSource(
            EPWM4_BASE, EPWM_DC_MODULE_A, EPWM_DC_EVENT_1, EPWM_DC_EVENT_SOURCE_ORIG_SIGNAL);

    EPWM_setDigitalCompareEventSyncMode(
            EPWM4_BASE, EPWM_DC_MODULE_A, EPWM_DC_EVENT_1, EPWM_DC_EVENT_INPUT_SYNCED);

    EPWM_setActionQualifierT1TriggerSource(EPWM4_BASE, EPWM_AQ_TRIGGER_EVENT_TRIG_DCA_1);


    EPWM_enableTripZoneInterrupt(EPWM4_BASE, EPWM_TZ_INTERRUPT_DCAEVT1);

    EPWM_setTripZoneAction(EPWM4_BASE, EPWM_TZ_ACTION_EVENT_DCAEVT1,
                           EPWM_TZ_ACTION_DISABLE);

    EPWM_setPeriodLoadMode(EPWM4_BASE, EPWM_PERIOD_DIRECT_LOAD);

    EPWM_setTimeBasePeriod(EPWM4_BASE,0xFFFF);
    EPWM_setPhaseShift(EPWM4_BASE, 0U);
    EPWM_setTimeBaseCounter(EPWM4_BASE, 0U);

    EPWM_setPeriodLoadMode(EPWM4_BASE, EPWM_PERIOD_DIRECT_LOAD);

    EPWM_setTimeBaseCounterMode(EPWM4_BASE, EPWM_COUNTER_MODE_UP);
    EPWM_disablePhaseShiftLoad(EPWM4_BASE);
    EPWM_setClockPrescaler(EPWM4_BASE,
                              EPWM_CLOCK_DIVIDER_1,
                              EPWM_HSCLOCK_DIVIDER_1);

    EPWM_setActionQualifierAction(EPWM4_BASE,
                                         EPWM_AQ_OUTPUT_A,
                                         EPWM_AQ_OUTPUT_HIGH,
                                         EPWM_AQ_OUTPUT_ON_TIMEBASE_ZERO);
    EPWM_setActionQualifierAction(EPWM4_BASE,
                                         EPWM_AQ_OUTPUT_A,
                                         EPWM_AQ_OUTPUT_LOW,
                                         EPWM_AQ_OUTPUT_ON_T1_COUNT_UP);
    EPWM_setActionQualifierAction(EPWM4_BASE,
                                         EPWM_AQ_OUTPUT_B,
                                         EPWM_AQ_OUTPUT_HIGH,
                                         EPWM_AQ_OUTPUT_ON_TIMEBASE_ZERO);
    EPWM_setActionQualifierAction(EPWM4_BASE,
                                         EPWM_AQ_OUTPUT_B,
                                         EPWM_AQ_OUTPUT_LOW,
                                         EPWM_AQ_OUTPUT_ON_T1_COUNT_UP);

    EPWM_setDeadBandCounterClock(EPWM4_BASE,EPWM_DB_COUNTER_CLOCK_HALF_CYCLE);
    EPWM_setRisingEdgeDelayCount(EPWM4_BASE,pwm_db_ticks_hs);
    EPWM_setFallingEdgeDelayCount(EPWM4_BASE,pwm_db_ticks_ls);

    EPWM_setDeadBandDelayMode(EPWM4_BASE,EPWM_DB_RED,true);
    EPWM_setDeadBandDelayMode(EPWM4_BASE,EPWM_DB_FED,true);
    EPWM_setRisingEdgeDeadBandDelayInput(EPWM4_BASE,EPWM_DB_INPUT_EPWMA);
    EPWM_setFallingEdgeDeadBandDelayInput(EPWM4_BASE,EPWM_DB_INPUT_EPWMB);
    EPWM_setDeadBandDelayPolarity(EPWM4_BASE,EPWM_DB_RED,
                                         EPWM_DB_POLARITY_ACTIVE_HIGH);
    EPWM_setDeadBandDelayPolarity(EPWM4_BASE,EPWM_DB_FED,
                                         EPWM_DB_POLARITY_ACTIVE_LOW);
}

void InitGPIO()
{

    GPIO_setDirectionMode(11, GPIO_DIR_MODE_OUT);
    GPIO_setPadConfig(11, GPIO_PIN_TYPE_STD);
    GPIO_setMasterCore(11, GPIO_CORE_CPU1);
    GPIO_setQualificationMode(11, GPIO_QUAL_ASYNC);


    GPIO_setDirectionMode(EPWM3_BASE_H_GPIO,GPIO_DIR_MODE_OUT);
    GPIO_setPadConfig(EPWM3_BASE_H_GPIO,GPIO_PIN_TYPE_STD); // disable
    GPIO_setPinConfig(EPWM3_BASE_H_GPIO_PIN_CONFIG);

    GPIO_setDirectionMode(EPWM3_BASE_L_GPIO,GPIO_DIR_MODE_OUT);
    GPIO_setPadConfig(EPWM3_BASE_L_GPIO,GPIO_PIN_TYPE_STD); // disable
    GPIO_setPinConfig(EPWM3_BASE_L_GPIO_PIN_CONFIG);

    GPIO_setDirectionMode(EPWM4_BASE_H_GPIO,GPIO_DIR_MODE_OUT);
    GPIO_setPadConfig(EPWM4_BASE_H_GPIO,GPIO_PIN_TYPE_STD); // disable
    GPIO_setPinConfig(EPWM4_BASE_H_GPIO_PIN_CONFIG);

    GPIO_setDirectionMode(EPWM4_BASE_L_GPIO,GPIO_DIR_MODE_OUT);
    GPIO_setPadConfig(EPWM4_BASE_L_GPIO,GPIO_PIN_TYPE_STD); // disable
    GPIO_setPinConfig(EPWM4_BASE_L_GPIO_PIN_CONFIG);
}

（2）EPWM3和EPWM4中的TBCTR寄存器均有数值，但是EPWM3能发波，而EPWM4没有波形输出：EPWM3的TBCTR寄存器在某一时刻数值为0x06F2，EPWM4的TBCTR寄存器在某一时刻数值为0x3DD3，都一样存在数值，区别只是大小不同，EPWM4理应输出频率不同于EPWM3的方波波形才是呀。

2 年多前

0 Yale Li 李耀先 2 年多前

TI__Guru 65745 points

这两个波形是什么信号？在哪个引脚上监测到的？

0 丘球球QYG 2 年多前回复 Yale Li 李耀先

Prodigy 10 points

“GpioDataRegs.GPASET.bit.GPIO11=1和GpioDataRegs.GPACLEAR.bit.GPIO11=1;;”这两句语句，分别放在epwm3TZISR和epwm4TZISR中断里的开头和结尾，即进入中断时刻GPIO11置高，中断执行完成GPIO11复位，目的是查看进入中断需要的时长和频率。在测试epwm3TZISR中断时注释掉epwm4TZISR中断，反之一样，在测试epwm4TZISR中断时注释掉epwmTZISR中断。

0 Yale Li 李耀先 2 年多前回复丘球球QYG

TI__Guru 65745 points

EPWM3波形的频率和ISR的频率能对上吗？

根据你发上来的代码，周期值设定的都是一样的，频率应该相同才对。

丘球球QYG 说：
EPWM3的TBCTR寄存器在某一时刻数值为0x06F2，EPWM4的TBCTR寄存器在某一时刻数值为0x3DD3，都一样存在数值，区别只是大小不同

你在初始化EPWM模块之前，有关闭EPWM的外设时钟、然后在初始化之后再打开吗？这样配置之后，两个EPWM模块的计数值应该是相同的。

0 丘球球QYG 2 年多前回复 Yale Li 李耀先

Prodigy 10 points

您好，EPWM3发波频率和epwm3TZISR中断频率是一致的，当然，EPWM4发波频率和epwm4TZISR中断频率也是一致的。但是前者EPWM3的频率是88kHz，是正确的，而后者EPWM4的频率是1.28MHz，是错误的，我直接将EPWM3和epwm3TZISR改数字为EPWM4和epwm4TZISR出现的问题，但是不知道问题如何解决，主要就是epwm4TZISR和EPWM4之间的配置存在问题。