Date: Sat, 28 Feb 2015 08:30:37 -0800 From: Adrian Chadd <adrian@freebsd.org> To: Milan Obuch <freebsd-arm@dino.sk> Cc: "freebsd-arm@freebsd.org" <freebsd-arm@freebsd.org> Subject: Re: Raspberry Pi with PiTFT - some GPIO weirdness Message-ID: <CAJ-Vmonxnzfd7c0TRHqFqm0gOArXN7hYpsBqsjahfVvD_OFR4Q@mail.gmail.com> In-Reply-To: <20150228142424.6fed0ecf@zeta.dino.sk> References: <20150228111852.15affe31@zeta.dino.sk> <20150228193658.6c872779@B85M-HD3-0.alogt.com> <20150228142424.6fed0ecf@zeta.dino.sk>
next in thread | previous in thread | raw e-mail | index | archive | help
Please file a PR with this information and I'll make sure the ARM GPIO
folk see it.
Thanks!
-a
On 28 February 2015 at 05:24, Milan Obuch <freebsd-arm@dino.sk> wrote:
> On Sat, 28 Feb 2015 19:36:58 +0800
> Erich Dollansky <erichsfreebsdlist@alogt.com> wrote:
>
>> Hi,
>>
>> On Sat, 28 Feb 2015 11:18:52 +0100
>> Milan Obuch <freebsd-arm@dino.sk> wrote:
>>
>> > today I found some time to play a bit with my little display
>> > attached to Rasoberry Pi, and I decided to test buttons connected
>> > to GPIO, as this should work on FreeBSD already. According docs,
>> > buttons are connected to GPIO lines 23, 22, 21 and 18, leftmost
>> > first.
>> >
>> > Using basic 'gpioctl -f /dev/gpioc0 -lv' command I found only first
>> > one, on line 23, reacts. It has value 1 normally and 0 when pressed.
>> >
>> you must setup the pins as inputs first before using them as inputs. I
>> would not rely on any defaults.
>>
>> Erich
>
> According available docs, all GPIO are set to input mode after reset.
> This seems not to be the case, but that's not my point. What was a bit
> of surprise for me was even 'gpioctl -f /dev/gpioc0 -l' tells those
> pins are in input mode ('pin nn<IN>'), it did not work. And fact that
> even after power disconnect the state remains the same is even more
> weird.
>
> Anyway, I accept the necessity for setup, the question is, where should
> these setup instruction go.
>
> Regards,
> Milan
> _______________________________________________
> freebsd-arm@freebsd.org mailing list
> http://lists.freebsd.org/mailman/listinfo/freebsd-arm
> To unsubscribe, send any mail to "freebsd-arm-unsubscribe@freebsd.org"
Want to link to this message? Use this URL: <https://mail-archive.FreeBSD.org/cgi/mid.cgi?CAJ-Vmonxnzfd7c0TRHqFqm0gOArXN7hYpsBqsjahfVvD_OFR4Q>