Writing Pin-muxing registers in an am3359.

Christian Helmuth christian.helmuth at ...1...
Thu Oct 24 17:30:46 CEST 2013


On Thu, Oct 24, 2013 at 11:20:09AM -0400, Bob Stewart wrote:
> Thanks for the reply Christian. If I'm writing to a local memory location 
> why would the change in value not show in the debugger, even if that 
> location is memory mapped to a hardware register?

>From my experience this heavily depends on the device behind the
"memory location" as this is not RAM. The device may, for example,
interpret bit 0 set on write as "clear register", which would gain you
0x0 on writing 0x1. Note, it was just a plain guess as I do not know
your platform or device very well.

BTW, which Ksyslabs repository and branch did you base your work on?
Does it already include a GPIO driver for your BeagleBone?

Christian Helmuth
Genode Labs

http://www.genode-labs.com/ · http://genode.org/
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