Re: Raspberrypi GPIO access through EPICS

[Florian Feldbauer <florian@ep1.ruhr-uni-bochum.de>]

Dear Vivek,

I wrote a device support for handling GPIOs via the /dev/class/gpio 
interface,
also supporting I/O interrupt.
It was tested on BeagleBone Black and Raspberry Pi Rev2.

The source is available at github
https://github.com/ffeldbauer/epics-devgpio

Regards,
Florian

On 03/02/2016 06:44 AM, Mark Rivers wrote:
> I would recommend that you use the asynPortDriver C++ base class to write a driver.  You then don't need to write any device support, just a driver.
>
> This page describes asynPortDriver.
>
> http://www.aps.anl.gov/epics/modules/soft/asyn/R4-29/asynPortDriver.html
>
> It contains a link to the following document that is an introductory talk on how to write a driver using asynPortDriver.  This example includes doing simply binary and analog I/O.
>
> https://subversion.xray.aps.anl.gov/synApps/measComp/trunk/documentation/measCompTutorial.pdf
>
> In this example the driver is making calls to the Measurement Computing library to do the I/O, but you would just substitute the C calls you have for the GPIO.
>
> Mark
>
> ________________________________
> From: tech-talk-bounces@aps.anl.gov [tech-talk-bounces@aps.anl.gov] on behalf of vivek singh [viveksingh74155@gmail.com]
> Sent: Tuesday, March 01, 2016 11:02 PM
> To: tech-talk@aps.anl.gov
> Subject: Raspberrypi GPIO access through EPICS
>
> Hello all,
>
> I want to access my Rapberrypi GPIO through EPICS. I had refered some documents which suggested to write device support and driver for it. Can you please suggest me from where to start and how?  And if possible send me some examples for accessing GPIO.
>
> I have a programm in C and python which can toggle raspberry pi GPIO, What are the ways to do that through epics?
>
> [https://ssl.gstatic.com/ui/v1/icons/mail/images/cleardot.gif]
>
>
> --
> -regards
>   Vivek

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| Dr. Florian Feldbauer                |
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