I am trying to construct I2S clock and frame sync by using the PGC in trigger-mode, hoping to synchronize to an external periodic event.
The very first cycle, the signals are generated as advertized -- 2.5 - 3.5 cycles (of internal sys clk) after the event, both FS and clock transition.
However, thereafter, they just free run while ignoring the trigger.
Is there a way to make it always re-sync to the trigger, any time the event occurs?
I don't see this addressed in the documentation.