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STM32f4 4-channel PWM with phase shift and variable duty cycle

Question asked by igor0428 on Apr 1, 2015
Latest reply on Apr 7, 2015 by Clive One

I'm stucked and want to ask for some clues.

I'm building an 4-phase interleaved boost converter and I need to run a 4-channel PWM with phase shift (90 degree on each channel) and variable duty cycle (same for all channels).

I tried to use OC Toggle Mode, but I was unable to change duty cycle.
In PWM1 I was unable to phase shift.
I tried to use one timer at 4xfreq and then in interrupts fire 4 separate timer, but it wasn't accurate.

Will appreciate for any hints, becouse I'm trying to manage it for a week.