Re: [Gumstix-users] Verdex standby mode issue

[Ash C. <ash...@gm...>]

Hi Thomas,

I just gave your set of commands a try on my Verdex (running Angstrom
2.6.31) and also was not able to get the Verdex to wake-up but I've
not played with the power management before.  As I understand, I
should only need to do:
$ echo GPIO > /proc/gpio/GPIO13
$ echo in > /proc/gpio/GPIO13
$ pxaregs pwer_we13 1
$ pxaregs prer_re13 1
$ pxaregs pfer_fe13 1
$ echo standby > /sys/power/state
Which yields:
"PM: Syncing filesystems ... done.
Freezing user space processes ... (elapsed 0.00 seconds) done.
Freezing remaining freezable tasks ... (elapsed 0.00 seconds) done.
Suspending console(s) (use no_console_suspend to debug)"

Unfortunately, toggling GPIO13 externally doesn't wake the system up.

If you 'cat /proc/gpio/GPIO13' in both your code and rc.5 do you see a
difference?  Also, can you explain in more detail what
"// primes the system for echo command
    system("echo;");"
is doing?

Cheers,


-Ash
On Thu, May 6, 2010 at 9:44 AM, killahemp <hem...@gm...> wrote:
>
> Hello all,
>
> I am using a Verdex Pro XL6P Com board with the gumstix-oe build on ubuntu
> 7.10.  I have everything up and running pretty much the way I want it except
> the "Standby" mode.  I have a large program that launches at startup and
> creates a gui.  In the event of a power loss I send the gumstix a command
> that tells it to enter standby mode.  To enter standby mode I use the
> following C code from inside my program.
>
>     //  sets GPIO13 to an input pin
>     system("echo in > /proc/gpio/GPIO13");
>     // sets power wake up enabled GPIO 13 register to 1
>     system("pxaregs pwer_we13 1");
>     // sets the rising edge enable register to 1
>     system("pxaregs prer_re13 1");
>     // sets the fallign edge enable register to 1
>     system("pxaregs pfer_fe13 1");
>     // sets the power wake up enable real time clock register to 1
>     system("pxaregs pwer_wertc 1");
>     // sets GPIO101 to an output for watchdog timer
>     system("echo out > /proc/gpio/GPIO101");
>     // primes the system for echo command
>     system("echo;");
>     // puts system to sleep
>     system("echo standby > /sys/power/state");
>
> The problem I'm getting is that when this code is ran the screen goes blank
> except a blinking line in the first text position.  I am unable to wake the
> gumstix back up.  I know that this isn't the actual standby mode.
>
> If I take the above code and make a startup script in /etc/rc5.d and restart
> the gumstix I can enter and exit standby mode with no problems.  Any help
> you can provide is greatly appriciated
>
> Thank you,
> Thomas
>
> --
> View this message in context: http://old.nabble.com/Verdex-standby-mode-issue-tp28476459p28476459.html
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>
>
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