Read GPIO Through /dev/mem on BeagleBoneBlack?

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1

I’m trying to speed up some PWM IO code by reading/writing straight through /dev/mem

I found an example that toggles a led, but non that read GPIO as input.

Can anyone point me to an example or some documentation of the GPIO’s physical memory addresses?

Thanks!
/Jacob

2

You want the AM335x Technical Reference Manual from TI.

3

Though you cannot avoid searching TRM, Technical Reference Manual, you can get some help on this site.

http://derekmolloy.ie/gpios-on-the-beaglebone-black-using-device-tree-overlays/