Hi, I use the eTPU2 on MPC5745R to generate PWMs for motor control.
A recommended design strategy for eTPUs is to assign the base and complementary pwm outputs to adjacent channels in order to leverage the registers for parameter passing between the two.
I assigned the phase W pwm channels as below:
PhaseW_Base eTPU9_A PG[2]
//PG[3], PG[4] not available on LQFP
PhaseW_Complementary eTPU11_A PG[5]
Note that physically they are not adjacent channels. However, on the LQFP package, eTPU10_A configurable port, PortPG[4] is not available. It is too late in the design to search for another set of 3 adjacent eTPU chans. So my questions are:
(a) if the port is unavailable on the package, will the eTPU still schedule the chan processing? I would think so, for the eTPU scheduler has no knowledge of package. Need confirmation.
(b) Is it possible to prevent scheduling eTPU10_A ? Or in other words, can I force the eTPU to transition from chan9_A to chan11_A, in which case the two will effectively be "adjacent" and I can leverage the registers for parameter passing.
Thank you for your suggestions.
