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! :-)
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