mail archive of the barebox mailing list
 help / color / mirror / Atom feed
From: "Robert P. J. Day" <rpjday@crashcourse.ca>
To: "Eric Bénard" <eric@eukrea.com>
Cc: barebox@lists.infradead.org
Subject: Re: how to read GPIO values from command line?
Date: Thu, 9 Feb 2012 13:37:34 -0500 (EST)	[thread overview]
Message-ID: <alpine.DEB.2.02.1202091336340.2680@oneiric> (raw)
In-Reply-To: <20120209174519.4d0ae559@eb-e6520>

[-- Attachment #1: Type: TEXT/PLAIN, Size: 1147 bytes --]

On Thu, 9 Feb 2012, Eric Bénard wrote:

> Le Thu, 9 Feb 2012 11:34:55 -0500 (EST),
> "Robert P. J. Day" <rpjday@crashcourse.ca> a écrit :
> >   so what exactly does one do to read those values?  i tried:
> >
> > barebox@Texas Instrument's Beagle:/ gpio_direction_input 171
> > barebox@Texas Instrument's Beagle:/ gpio_get_value 171
> >
> > but what do i check?  the shell variable $?  i'm not sure what i
> > should do next.
> >
> you can check the mux of the pins to be sure they are in GPIO mode.

  how do i do that from the barebox prompt?  i can see the
gpio-related commands for setting direction and getting/setting
values, but how does one check if those pins are properly in gpio
mode?

rday

-- 

========================================================================
Robert P. J. Day                                 Ottawa, Ontario, CANADA
                        http://crashcourse.ca

Twitter:                                       http://twitter.com/rpjday
LinkedIn:                               http://ca.linkedin.com/in/rpjday
========================================================================

[-- Attachment #2: Type: text/plain, Size: 149 bytes --]

_______________________________________________
barebox mailing list
barebox@lists.infradead.org
http://lists.infradead.org/mailman/listinfo/barebox

  parent reply	other threads:[~2012-02-09 18:37 UTC|newest]

Thread overview: 7+ messages / expand[flat|nested]  mbox.gz  Atom feed  top
2012-02-09 16:34 Robert P. J. Day
2012-02-09 16:45 ` Eric Bénard
2012-02-09 17:32   ` Robert P. J. Day
2012-02-09 18:37   ` Robert P. J. Day [this message]
2012-02-09 18:43     ` Eric Bénard
2012-02-09 18:54       ` Robert P. J. Day
2012-02-10  7:34 ` Sascha Hauer

Reply instructions:

You may reply publicly to this message via plain-text email
using any one of the following methods:

* Save the following mbox file, import it into your mail client,
  and reply-to-all from there: mbox

  Avoid top-posting and favor interleaved quoting:
  https://en.wikipedia.org/wiki/Posting_style#Interleaved_style

* Reply using the --to, --cc, and --in-reply-to
  switches of git-send-email(1):

  git send-email \
    --in-reply-to=alpine.DEB.2.02.1202091336340.2680@oneiric \
    --to=rpjday@crashcourse.ca \
    --cc=barebox@lists.infradead.org \
    --cc=eric@eukrea.com \
    /path/to/YOUR_REPLY

  https://kernel.org/pub/software/scm/git/docs/git-send-email.html

* If your mail client supports setting the In-Reply-To header
  via mailto: links, try the mailto: link
Be sure your reply has a Subject: header at the top and a blank line before the message body.
This is a public inbox, see mirroring instructions
for how to clone and mirror all data and code used for this inbox