[MinnowBoard] GPIO access under UEFI

[Grigory V. Korotov]

Thanks i also found this article and thread from edk mailing list.


28.08.2015 18:06, Bill Traynor пишет:
> On Fri, Aug 28, 2015 at 10:36 AM, Grigory V. Korotov <grinux at mail.ru> wrote:
>> Thanks for fast answer.
>> I mean i need to access GPIO on UEFI source code level.
> Well, googling around a bit, I can't find much on that.  Perhaps
> you'll need a GPIO library or have to implement one yourself as
> described in this paper:
>
> http://ijset.com/ijset/publication/v3s5/IJSET_2014_515.pdf
>
> You may wish to try the EDK mailing list as well, as there seems to be
> some content out there regarding this:
>
> http://feishare.com/efimail/messages/20110921-2155-Re__edk2__Accessing_the_CMOS_NVRAM_and_GPIO_pins_from_UEFI-Andrew_Fish.html
>
>
>>
>>
>>
>> 28.08.2015 17:27, Bill Traynor пишет:
>>
>>> On Fri, Aug 28, 2015 at 8:15 AM, Grigory V. Korotov <grinux at mail.ru>
>>> wrote:
>>>> Hi
>>>> Could someone tell me how to access GPIO under UEFI?
>>>> I wrote some custom code and i need to indicate entering my function by
>>>> triggering gpio level.
>>> This page shows you how to enable/disable GPIO in the BIOS:
>>> http://elinux.org/Minnowboard:MaxBios
>>>
>>> Following enabling GPIO have a look at this page:
>>> http://wiki.minnowboard.org/Projects/AdaFruit_GPIO
>>>
>>> I think you'll need the mraa library to accomplish what you're after,
>>> but I could be wrong.
>>>
>>>> Thanks.
>>>>
>>>> Grigory.
>>>>
>>>>
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