Writing Pin-muxing registers in an am3359.

[Bob Stewart]

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?

Bob Stewart

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On October 24, 2013 9:31:37 AM Christian Helmuth 
<christian.helmuth at ...1...> wrote:
> Hello Bob,
>
> On Thu, Oct 24, 2013 at 08:57:08AM -0400, Bob Stewart wrote:
> > I write a value of 5 to the register offset 0x800 into the Control
> > dataspace:
> > /[init -> gpio_drv] mmio write 0x4800: 0x00000005//
> > //[init -> gpio_drv] void Omap_driver::set_pin_controls(int, int,
> > int): B=1, P=0, Mode=5, Input=0, Offset=0/
> > In jdb I see that the value at 0x4800 has not changed after
> > apparently writing 5 to it.
>
> It's just a guess, but are you sure that reading the register should
> gain the value write to it before? Often, the semantics of device
> registers are different from this assumption.
>
> Greets
> --
> Christian Helmuth
> Genode Labs
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