[PD] how to install and use GPIO external

[Josh Downing]

Awesome! I got it working! Thanks for all the help!

One more question, does anyone know if you can set the internal
pullup/pulldown for the GPIO pins from within PD and if so how you can set
this?

Thanks,
Josh


On Wed, Jun 19, 2013 at 5:52 PM, J Oliver <jaime.oliver2 at gmail.com> wrote:

> On Jun 19, 2013, at 7:07 PM, Josh Downing wrote:
>
> click "enable 1", "open 1", and then "output 0".
>
> ok.
>
> No error messages but where should I expect to see the high/low state of
> GPIO 17?
>
> it should come out of the object into a number box or toggle as far as I
> can remember...
> put a number box in the outlet of the gpio object.
>
> J
>
> Should this be reflected in the bang object in the script (white for low
> and black for high)?
>
>
>  I have the poll input check box checked. When I toggle the voltage on
> GPIO 17 from 3.3V to GND I do not see anything change in the script. I am
> able to see the high/low state of the pin 17 change by using the "readall"
> command from LXTerminal so I know that I'm switching the voltage correctly
> on the right pin, just not seeing how I get this status in pure data using
> the gpio-help.pd script. Any thought on how I do this?
>
> Sorry I have very little experience with pure data and am just learning.
>
> Thanks,
> Josh
>
>
> On Wed, Jun 19, 2013 at 11:17 AM, Jaime Oliver <jaime.oliver2 at gmail.com>wrote:
>
>> you need to be root.
>>
>> start pd with sudo. unless there is a more permanent solution by now?
>>
>> best,
>>
>> J
>>
>>
>> On Wed, Jun 19, 2013 at 6:02 PM, Josh Downing <jndowning at gmail.com>wrote:
>>
>>> Thanks for the help guys! So I deleted the "-m32" from the makefile and
>>> then everything seemed to build okay. I then added the correct path for the
>>> extension in pure data and loaded the "gpio-help.pd" patch without getting
>>> an error message. In the gpio-help.pd patch I would click "enable 1" and
>>> then click "open 1" and after clicking "open 1" I would get an error
>>> message: "/sys/class/gpio/gpio17/value: No such file or directory".
>>>
>>> I then realized that I probably needed to install wiringPi. I downloaded
>>> this and installed it. However I would still get the previous error message
>>> within PD. I then decided to manually try to create the file using commands
>>> in LXTerminal. I did this using this command, "echo "17" |sudo tee
>>> /sys/class/gpio/export". I then noticed that the gpio17 folder and
>>> accompanying files were created. I was also able to correctly read the
>>> state of the pin using "gpio readall" command from LXTerminal.
>>>
>>> I then loaded the "gpio-help.pd" file again in PD. Now once I click
>>> "open 1" instead of the no such file or directory error I get
>>> "/sys/class/gpio/gpio17/value: Permision denied" error. Is there someway I
>>> can use this GPIO library within the PD visual interface without getting
>>> permission denied errors? Also, shouldn't clicking "enable 1" within the
>>> gpio-help.pd patch create the "/sys/class/gpio/gpio17" folder and
>>> accompanying files? How can I get this to work within PD without having to
>>> run the commands from LXTerminal to create the folder/files? Do I need to
>>> somehow indicate to pure data the path of wirngPi?
>>>
>>> Almost there! Really appreciate your guys patience with me and help on
>>> this!
>>>
>>> Josh
>>>
>>>
>>> On Wed, Jun 19, 2013 at 6:31 AM, IOhannes m zmoelnig <zmoelnig at iem.at>wrote:
>>>
>>>> -----BEGIN PGP SIGNED MESSAGE-----
>>>> Hash: SHA1
>>>>
>>>> On 2013-06-18 23:37, Josh Downing wrote:
>>>> >
>>>> >
>>>> > cc -DPD -O2 -funroll-loops -fomit-frame-pointer
>>>> > -fno-strict-aliasing -Wall -W -Wshadow -Wstrict-prototypes
>>>> > -Wno-unused -Wno-parentheses -Wno-switch  -I../pd/src
>>>> > -I../../pd/src -I../../../pd/src -I../../../../pd/src
>>>> > -I../../../../../pd/src -m32 -o gpio.o -c gpio.c cc1: error:
>>>> > unrecognized command line option ?-m32? make: *** [gpio.l_i386]
>>>> > Error 1
>>>> >
>>>> > Do you know what this error message could mean?
>>>>
>>>> it means that the makefile has a compiler flag "-m32" which is not
>>>> known to the compiler.
>>>>
>>>> > What should I expect as the output from compiling like this?
>>>>
>>>> nothing. the build failed.
>>>>
>>>> you could try editing your makefile and removing the "-m32"
>>>> occurences, and see what you get then.
>>>>
>>>> make a backup of the makefile, before you go ahead.
>>>>
>>>> fgamsrd
>>>> IOhannes
>>>> -----BEGIN PGP SIGNATURE-----
>>>> Version: GnuPG v1.4.12 (GNU/Linux)
>>>> Comment: Using GnuPG with Icedove - http://www.enigmail.net/
>>>>
>>>> iEYEARECAAYFAlHBlqMACgkQkX2Xpv6ydvSjtACg7y5vI4qGYDwjphUooM/Yt+RZ
>>>> /KcAoKpb6waukrnp35DZQGFYmP88XAVD
>>>> =0t/E
>>>> -----END PGP SIGNATURE-----
>>>>
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>>>
>>>
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>>>
>>
>>
>> --
>> **********************
>> Jaime E Oliver LR
>> www.jaimeoliver.pe
>>
>>
>
>
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