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Re: rom_i2c funcs?

PostPosted: Fri Sep 24, 2021 9:27 am
by eriksl
I have done some more experimenting in the meantime, with some more information I found.

All "alternative" frequencies that are offered this way make the APB bus change too. That has interesting consequences. As I already expected the wifi system can't handle the APB bus being other than 80 MHz, the UART needs tweaking (ok, not that much a problem) but also the timers no longer run at frequencies as expected. And last but not least, I expect all sort of issues with the built-in peripherals.

What I am looking for is purely the cpu core running at a higher speed, while leaving the APB at 80 MHz. It may or may not be possible with the PLL and clock dividers, but apparently noone succeeded there (yet).