Date: Sat, 28 Feb 2015 19:36:58 +0800 From: Erich Dollansky <erichsfreebsdlist@alogt.com> To: Milan Obuch <freebsd-arm@dino.sk> Cc: freebsd-arm@freebsd.org Subject: Re: Raspberry Pi with PiTFT - some GPIO weirdness Message-ID: <20150228193658.6c872779@B85M-HD3-0.alogt.com> In-Reply-To: <20150228111852.15affe31@zeta.dino.sk> References: <20150228111852.15affe31@zeta.dino.sk>
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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
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