Hi Bala,
The problem is that EVA and EVB have 2 separate timers. The phase separation of PWMs from the
two units has to do with when the EVA timer (T1) is started relative to EVB (T3). The best way
to minimize this separation is to start T3 timer immediately after T1 timer. To close the gap
more, you can initialize the T3 timer with start count so it equals T1 when it is started. This
initial value depends on timer scaling and count mode. To see the code in action, you can
download a free trial of VisSim, a block diagram language for easy model based development for
F28xx targets here: http://www.vissim.com/downloads/demos.html. Just start VisSim and place 2
Full Compare PWM blocks in a diagram, right click them to set up desired PWM behavior, and
click the "compile" button to generate code to see exactly how it is done.
Regards,
Jim