在使用EPWM模块来产生PWM驱动的时候，出现了一些很异常的现象，即会出现PWM驱动丢失或者PWM密集输出的情况
（使用到了载波移相，EPWM3的具体配置如下）
// Set-up TBCLK
EPWM_setClockPrescaler(EPWM3_BASE, EPWM_CLOCK_DIVIDER_1, EPWM_HSCLOCK_DIVIDER_1);
EPWM_setTimeBasePeriod(EPWM3_BASE, INV_PWM_PERIOD);
EPWM_setTimeBaseCounter(EPWM3_BASE, 0U);
EPWM_setTimeBaseCounterMode(EPWM3_BASE, EPWM_COUNTER_MODE_UP_DOWN);
EPWM_enablePhaseShiftLoad(EPWM3_BASE);
EPWM_setPhaseShift(EPWM3_BASE, INV_PWM_PHASERELOAD);
EPWM_setCountModeAfterSync(EPWM3_BASE,EPWM_COUNT_MODE_DOWN_AFTER_SYNC);
EPWM_setSyncOutPulseMode(EPWM3_BASE, EPWM_SYNC_OUT_PULSE_ON_EPWMxSYNCIN);
// Set up shadowing
EPWM_setCounterCompareShadowLoadMode(EPWM3_BASE, EPWM_COUNTER_COMPARE_A, EPWM_COMP_LOAD_ON_CNTR_PERIOD);
// Set Compare values
EPWM_setCounterCompareValue(EPWM3_BASE, EPWM_COUNTER_COMPARE_A, 0);
// Set actions
EPWM_setActionQualifierAction(EPWM3_BASE, EPWM_AQ_OUTPUT_A, EPWM_AQ_OUTPUT_LOW, EPWM_AQ_OUTPUT_ON_TIMEBASE_UP_CMPA);
EPWM_setActionQualifierAction(EPWM3_BASE, EPWM_AQ_OUTPUT_A, EPWM_AQ_OUTPUT_HIGH, EPWM_AQ_OUTPUT_ON_TIMEBASE_DOWN_CMPA);
// Set dead-band - Use EPWMA as the input for both RED and FED
EPWM_setRisingEdgeDeadBandDelayInput(EPWM3_BASE, EPWM_DB_INPUT_EPWMA);
EPWM_setFallingEdgeDeadBandDelayInput(EPWM3_BASE, EPWM_DB_INPUT_EPWMA);
// Set dead-band - Set the RED and FED values
EPWM_setFallingEdgeDelayCount(EPWM3_BASE, INV_PWM_DB);
EPWM_setRisingEdgeDelayCount(EPWM3_BASE, INV_PWM_DB);
// Set dead-band - Do not invert the delayed outputs (AH)
EPWM_setDeadBandDelayPolarity(EPWM3_BASE, EPWM_DB_RED, EPWM_DB_POLARITY_ACTIVE_HIGH);
EPWM_setDeadBandDelayPolarity(EPWM3_BASE, EPWM_DB_FED, EPWM_DB_POLARITY_ACTIVE_LOW);
// Set dead-band - Use the delayed signals instead of the original signals
EPWM_setDeadBandDelayMode(EPWM3_BASE, EPWM_DB_RED, false);
EPWM_setDeadBandDelayMode(EPWM3_BASE, EPWM_DB_FED, false);
在PWM驱动输出时，控制EPWM1和3按照下面两个条件进行输出，每一个PWM周期切换一次
EPWM_setCounterCompareValue(EPWM1_BASE, EPWM_COUNTER_COMPARE_A, 0.5*TIMEBASEPRD);
EPWM_setCounterCompareValue(EPWM3_BASE, EPWM_COUNTER_COMPARE_A, 0U);
EPWM_setCounterCompareValue(EPWM1_BASE, EPWM_COUNTER_COMPARE_A, 0U);
EPWM_setCounterCompareValue(EPWM3_BASE, EPWM_COUNTER_COMPARE_A, 0.5*TIMEBASEPRD);
想请问专家，什么情况下可能会出现驱动丢失呢？如何排查该问题呢？
如果将上面EPWM的周期寄存器写0修改为通过软件强制来触发，即EPWM_setActionQualifierContSWForceAction(EPWM1_BASE, EPWM_AQ_OUTPUT_A, EPWM_AQ_SW_DISABLED)
然后将3个PWM周期作为一个输出单元，又会随机出现丢失一个PWM周期驱动的情况，如下
（上图中的黄的PWM输出，第三个pwm波还会随机被砍掉一块，如下图）
EPWM_setActionQualifierContSWForceAction，这个软件强制指令立刻生效吗？是否有shadowmode之类的？
另外，在解除软件强制的时候，PWM输出在那个瞬间是什么样的呢？会根据比较寄存器和周期寄存器的大小来立刻输出PWM驱动吗？
还有在对一路PWM的计数寄存器更新的时候，可能会出现更新的效果被同步到了另外一路，如下图
