TMS320F2800137: TMS320F2800137 period synchronization between ePWM1 (HR) and ePWM2 (noHR)

Tool/software:

Hi,

I am using ePWM1 for High Resolution and ePWM2 for standard resolution as ePWM2 does not support HR.

- when ePWM1 HRPCTL HRPE is clear (HR Period enable = 0, using HR COMPA or HR duty cycle), it seems that ePWM2 is sync with ePWM1.

- Because I need to change PWMs into a different mode of operation (HR variable frequency), I set ePWM1 HRPCTL.HRPE = 1, then ePWM2 is totally out of sync with ePWM1.

- How can we synchronized a HR and no-HR ePWM? They need to be same frequency. (frequency is variable)

See below for EPWM2 time Base configuration:

Thanks,

Arnaud