Re: my system can't resume : ( by Umesh
Umesh
Tue Dec 14 02:43:01 CST 2004
hi,
which version of OS are you working on?
can u put debug mesaage in oeminit. and in terms of power handling, i would
suggest, u go step by step.
initially just include display driver and check ur suspend resume and do put
debug message but make sure u dnt put in power handling code,the system might
abort.
check upto what level r u able to wake and make sure u are entering sleep
and the during sleep ur meeting hardware standards like power ,current.
overcurrent or too much power can also abruptly hang the device.
once ur clear with display start adding drivers one by one and test...
regards
Umesh Jagga
"Dean Ramsier" wrote:
> If the PWR_EN pin continues to toggle as you suspend/resume, that indicates
> that most of the software is running. Most likely, there is something wrong
> with your display code that is causing the display to not be visible on
> resume. Could be things like contrast, backlight, power control etc.
>
> --
> Dean Ramsier - eMVP
>
>
> "LDW" <li.dewen@gmail.com> wrote in message
> news:eu5t5WR4EHA.1392@tk2msftngp13.phx.gbl...
> > Dear All:
> >
> > when I press the Suspend Button,the system get into suspend,the PWR_EN
> > PIN from High to Low and keep Low.and when I press the suspend button
> > again,the PWR_EN PIN from Low to High and keep High.so it can tell us that
> > the system has responded the press action,right? but nothing happend,for
> no
> > display.I noticed that when I press the button again at this time,the
> PWR_EN
> > PIN can go down from High and press button again it go High from Low.what
> > can tell me?
> > I had a test:when the system call OEMPowerOff(),I return
> immediately,the
> > system still can work.so if these can tell me that the system devices has
> > power off OK?
> > by the way,I use GPIO1 as the wake up sources.falling edge detect.
> >
> >
>
>
>