CCS/TMS320F280049C: epwm sync and setting a phase .

steven xu

Tool/software: Code Composer Studio

Hello, everyone

I found some problem about epwm sync operation by TMS320F280049CPMS, I used epwm1 and epwm2 module. and use epwm1 TB as epwm2 sync signal.

now I can get the sync wave about epwm1 and epwm2 as follow, but when I setting a phase(period/2) to epwm2, it doesn't work, and it remain as before. The code of configure as follow:

pls help to find the reason, thanks!

over 7 years ago

0 Todd Anderson78572 over 7 years ago

Guru 14640 points

Here is an example of F2837x code: e2e.ti.com/.../768423

Hopefully, you can compare with yours to see differences.
I have taken the EPwm code from the F2837x multi-day workshop and modified somewhat to get sync working.

I know this is F2837x, but the EPwm does not differ much between these two processors.

Hopefully, that helps.

0 steven xu over 7 years ago in reply to Todd Anderson78572

Prodigy 60 points

thanks for your reply, I have found the reason, cause I ignored the phase registor is divide TBPHS and TBPHSHR two part, but I setting only the TBPHS.all = XXX in my code, so it didn't work. what a stupid mistake.

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CCS/TMS320F280049C: epwm sync and setting a phase .