Part Number: LAUNCHXL-F28379D
Dear Admin,
I hope you are doing great!
It has been a while since I started to implement a symmetric phase shift between ePWM1 and ePWM2 (in F28379D LAUNCHPAD) for the resonant converter that I designed.
The problem is that, I assumed all the ePWMs can be treated same way (e.g. ePWM2 can be synchronized by ePWM1 and reverse).
However, it seems that ePWMs are synchronized through a hierarchy; the synchronization is made from ePWM1 and should pass through ePWM2, ePWM3, and so on ...
If that is right, synchronization of ePWM1 (and making a phase-shift for it) does not have any meaning, and, as a result, we cannot make ePWM2 master and reference of phase shift for ePWM1 (I did that, and the result was completely distorted!).
And if that is right, it makes a big problem for me as I have to redesign my whole board and change its pin arrangements so that legs A and B are to be driven by ePWMs 2 and 3 (with ePWM1 as reference).
Long story short, is there any solution to apply dynamic and symmetric phayse shifts to ePWMs 1 and 2?
If not, can we replace the GPIOs of ePWM1 by 3 and reverse (I know it is possible to change the outputs, but it should be only between ePWMs 1 and 3 due to the design constrains)?
Your help with this regard is much appreciated.
Cheers,
Farzad
