1) Go to http://www.ti.com/product/am3358

2) Download the Technical Reference Manual

3) Look under Section 12....Touchscreen Controller.

Gerald




On Wed, Feb 19, 2014 at 1:56 PM, <[email protected]> wrote:

> John Syn <[email protected]> wrote:
> >
> > On 2/19/14, 10:25 AM, "[email protected]" <[email protected]> wrote:
> >
> > >Gerald Coley <[email protected]> wrote:
> > >> [-- text/plain, encoding quoted-printable, charset: ISO-8859-1, 43
> > >>lines --]
> > >>
> > >> External. Or internal. Or whichever one you want to use.
> > >>
> > >So it's selectable by software?  What does it default to using at
> > >power on?  I can't find any documentation about this in the BBB manual
> > >and the processor manual is not much more forthcoming.  The processor
> > >manual told me that the ADC can use either internal or external
> > >reference but I could find nothing further about it at all.
> > If you know the register name that is used to select between internal and
> > external ref, then use ³git grep <reg-name>² to find where that register
> > gets used in the kernel source. If there is no reference to this
> register,
> > then the default value will be used.
> >
> That's the problem, I can't find any documentation anywhere that tells
> me about the internal/external switching.  The whole of the ADC system
> is shrouded in mystery!  :-)
>
> --
> Chris Green
> ·
>
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