[Gumstix-users] GPIO programming and Interrupts

[shashidhara <sha...@gm...>]

Hello ,

I have written a device driver to make use of the gpio to trigger
interrupts. I have attached a part of the whole code. You can try using it.
I have attached the makefile as well. Edit the path to kernel source in the
makefile.

shashi.






> Date: Tue, 30 Jun 2009 01:39:42 -0700 (PDT)
> From: cruizbugs <cru...@ya...>
> Subject: [Gumstix-users]  GPIO programming and Interrupts
> To: gum...@li...
> Message-ID: <242...@ta...>
> Content-Type: text/plain; charset=us-ascii
>
>
> Hi, I have a few questions.
>
> I have a task to make my gumstix to control a switch.
>
> So, I am using a GPIO 28 to control the external device.
> I understand that I can use
> # echo "GPIO out set" > /proc/gpio/GPIO28
> # echo "GPIO out clear" > /proc/gpio/GPIO28
> to control the pin output manually, but what I have to do is to make an
> automatic on-off.
> meaning,
> I will have to read from a .txt file that contains all the day and time to
> on/off.
> this text file will turn on-off the switch every few minutes, i.e.
> Monday 01:00 am ON
> Monday 01:02 am OFF
> Monday 01:05 am ON
> Monday 01:59 am OFF
> etc..
>
> So, regarding this task and since i'm still new to linux,
> 1. i was thinking what programming language I should use? C or C++ ? which
> one easier?
>
> 2. i found this http://docwiki.gumstix.org/index.php/Sample_code/C/gpregs
> how to run this file ? does this work for verdex pro XL6P ? i'm using GPIO
> on consoleLCD16
>
> 3. Is there any idea on how to do this effectively?
> I was being told to try to use interrupt, for example, for every minute i
> will receive an interrupt, then i will read the list of the timing and
> check
> out if I have to on or off the switch.
> but the problem is, how to set this kind of interrupt? i heard about kernel
> programming, but i'm still quite lost here.
> or is there any other better way to do this task?
> I saw http://docwiki.gumstix.org/GPIO_event , but i dont think this is
> related to what I have to do, right ??
>
> sorry I ask alot.
> Thanks you in advance :-)
>
>
>
>
>