• State
  • Locked Locked
  • Replies 4 replies
  • Subscribers 83 subscribers
  • Views 379 views
  • Users 0 members are here
Support feedback
Options
Options
Related

This thread has been locked.

If you have a related question, please click the "Ask a related question" button in the top right corner. The newly created question will be automatically linked to this question.

TMDSCNCD280039C: ePWM generating a short pulse at the start

Rishabh Kaushik
Prodigy 70 points

Part Number: TMDSCNCD280039C
Other Parts Discussed in Thread: SYSCONFIG

Hi,

I'm using ePWM in complimentary mode. At the start of the program, I'm getting an undesired short pulse on channel B. Below is my configuration. It is generated by sysconfig. Can you kindly see what am I doing wrong? 

void EPWM_init(){
    EPWM_setClockPrescaler(GATE_HB1_BASE, EPWM_CLOCK_DIVIDER_1, EPWM_HSCLOCK_DIVIDER_1);
    EPWM_setTimeBasePeriod(GATE_HB1_BASE, 0);
    EPWM_setTimeBaseCounter(GATE_HB1_BASE, 0);
    EPWM_setTimeBaseCounterMode(GATE_HB1_BASE, EPWM_COUNTER_MODE_UP_DOWN);
    EPWM_disablePhaseShiftLoad(GATE_HB1_BASE);
    EPWM_setPhaseShift(GATE_HB1_BASE, 0);
    EPWM_setCounterCompareValue(GATE_HB1_BASE, EPWM_COUNTER_COMPARE_A, 0);
    EPWM_setCounterCompareShadowLoadMode(GATE_HB1_BASE, EPWM_COUNTER_COMPARE_A, EPWM_COMP_LOAD_ON_CNTR_ZERO);
    EPWM_setCounterCompareValue(GATE_HB1_BASE, EPWM_COUNTER_COMPARE_B, 0);
    EPWM_setCounterCompareShadowLoadMode(GATE_HB1_BASE, EPWM_COUNTER_COMPARE_B, EPWM_COMP_LOAD_ON_CNTR_ZERO);
    EPWM_setActionQualifierContSWForceAction(GATE_HB1_BASE, EPWM_AQ_OUTPUT_A, EPWM_AQ_SW_OUTPUT_LOW);
    EPWM_setActionQualifierAction(GATE_HB1_BASE, EPWM_AQ_OUTPUT_A, EPWM_AQ_OUTPUT_NO_CHANGE, EPWM_AQ_OUTPUT_ON_TIMEBASE_ZERO);
    EPWM_setActionQualifierAction(GATE_HB1_BASE, EPWM_AQ_OUTPUT_A, EPWM_AQ_OUTPUT_NO_CHANGE, EPWM_AQ_OUTPUT_ON_TIMEBASE_PERIOD);
    EPWM_setActionQualifierAction(GATE_HB1_BASE, EPWM_AQ_OUTPUT_A, EPWM_AQ_OUTPUT_HIGH, EPWM_AQ_OUTPUT_ON_TIMEBASE_UP_CMPA);
    EPWM_setActionQualifierAction(GATE_HB1_BASE, EPWM_AQ_OUTPUT_A, EPWM_AQ_OUTPUT_LOW, EPWM_AQ_OUTPUT_ON_TIMEBASE_DOWN_CMPA);
    EPWM_setActionQualifierAction(GATE_HB1_BASE, EPWM_AQ_OUTPUT_A, EPWM_AQ_OUTPUT_NO_CHANGE, EPWM_AQ_OUTPUT_ON_TIMEBASE_UP_CMPB);
    EPWM_setActionQualifierAction(GATE_HB1_BASE, EPWM_AQ_OUTPUT_A, EPWM_AQ_OUTPUT_NO_CHANGE, EPWM_AQ_OUTPUT_ON_TIMEBASE_DOWN_CMPB);
    EPWM_setActionQualifierContSWForceAction(GATE_HB1_BASE, EPWM_AQ_OUTPUT_B, EPWM_AQ_SW_OUTPUT_HIGH);
    EPWM_setActionQualifierAction(GATE_HB1_BASE, EPWM_AQ_OUTPUT_B, EPWM_AQ_OUTPUT_NO_CHANGE, EPWM_AQ_OUTPUT_ON_TIMEBASE_ZERO);
    EPWM_setActionQualifierAction(GATE_HB1_BASE, EPWM_AQ_OUTPUT_B, EPWM_AQ_OUTPUT_NO_CHANGE, EPWM_AQ_OUTPUT_ON_TIMEBASE_PERIOD);
    EPWM_setActionQualifierAction(GATE_HB1_BASE, EPWM_AQ_OUTPUT_B, EPWM_AQ_OUTPUT_HIGH, EPWM_AQ_OUTPUT_ON_TIMEBASE_UP_CMPA);
    EPWM_setActionQualifierAction(GATE_HB1_BASE, EPWM_AQ_OUTPUT_B, EPWM_AQ_OUTPUT_LOW, EPWM_AQ_OUTPUT_ON_TIMEBASE_DOWN_CMPA);
    EPWM_setActionQualifierAction(GATE_HB1_BASE, EPWM_AQ_OUTPUT_B, EPWM_AQ_OUTPUT_NO_CHANGE, EPWM_AQ_OUTPUT_ON_TIMEBASE_UP_CMPB);
    EPWM_setActionQualifierAction(GATE_HB1_BASE, EPWM_AQ_OUTPUT_B, EPWM_AQ_OUTPUT_NO_CHANGE, EPWM_AQ_OUTPUT_ON_TIMEBASE_DOWN_CMPB);
    EPWM_setFallingEdgeDeadBandDelayInput(GATE_HB1_BASE, EPWM_DB_INPUT_EPWMB);
    EPWM_setDeadBandDelayPolarity(GATE_HB1_BASE, EPWM_DB_FED, EPWM_DB_POLARITY_ACTIVE_LOW);
    EPWM_setDeadBandDelayMode(GATE_HB1_BASE, EPWM_DB_RED, true);
    EPWM_setDeadBandDelayMode(GATE_HB1_BASE, EPWM_DB_FED, true);
    EPWM_enableInterrupt(GATE_HB1_BASE);
    EPWM_setInterruptSource(GATE_HB1_BASE, EPWM_INT_TBCTR_D_CMPA);
    EPWM_setInterruptEventCount(GATE_HB1_BASE, 1);
    EPWM_enableInterruptEventCountInit(GATE_HB1_BASE);
    EPWM_forceInterruptEventCountInit(GATE_HB1_BASE);
}