[SOLVED] PWM frequency

JOSHUA SIRKIN

I am using the up board with Ubuntu. I followed the directions on the wiki and am able to get an output from the PWM, but I seem to only be able to do frequencies that are divisible by 293 Hz. Am I doing something wrong, or is this a limitation of the UP?

Dan O'Donovan

Hi Joshua

This is a limitation of the UP board. For PWM, it uses a 19.2MHz base clock and a 16-bit divider, as far as I remember. UP Squared has a 22-bit divider so should support more granular frequency steps.

Best regards,
-Dan

JOSHUA SIRKIN

Hmm, okay, thanks. The wiki should probably reflect that.