TMS320F280025C: HRPWM seem not accuracy when CMPAHR is 0

Hi Expert,

I did the test for HRPWM with the demo from C2000ware,

C:\ti\c2000\C2000Ware_3_04_00_00\driverlib\f28002x\examples\hrpwm

I only do a little modification for the below use compCount_test to set duty cycle,

HRPWM_setCounterCompareValue(ePWM[i], HRPWM_COUNTER_COMPARE_A, compCount_test);

I use scope to measure the duty cycle of pwm output, below are the relationship between compCount_test value and duty cycle.

we can see that when compCount_test=10240, CMPAHR = 0, then the duty cycle is 59.1%, which is smaller than both that when compCount_test=10239 and compCount_test=10300,

it does not make sense to have this value.

anything wrong for this? I post the code here for reproduce the issue.

hrpwm_ex4_duty_updown_sfo.7z