gumstix-users

Re: [Gumstix-users] Re: Find LCD timing for the ALPS on gumstix.org

[Craig H. <cr...@gu...>]

Michael,

if you send me the .mk file for it, I'll add it to the buildroot.

C

On Dec 9, 2005, at 7:19 PM, Michael Petchkovsky wrote:

> BTW I cross-compiled xvkbd (a virtual X keyboard) and have it  
> running on tinyX, could be a useful app for people who get  
> touchscreens going.

Re: [Gumstix-users] Find LCD timing for the ALPS on gumstix.org

[Mark W. <mwi...@gm...>]

Thanks Holly!

I do have pinouts and resolution at least, so that gives me some
chance. The link on the gumstix display page leads me here:
http://hubbard.engr.scu.edu/embedded/lcd/lfh8p4032b/lfh8p4032b.html

Im suprsied that when they made the page, they didnt list some of
those values, since they obivously are not in the datasheets provided.
If we do end up getting these values, Ill make sure to post them up on
the tikiwiki.


-Mark

On 10/11/05, Holly Gates <hg...@ei...> wrote:
> I'm sure I will be less useful to you since I have not worked with that
> particular display. But in general what I do for an active display is:
>
> - get the fb set up to the right size, as described on the wiki page.
> Probably this will be just the resolution of your screen. If you don't
> know it, start out with something bigger than you think the screen is.
>
> - install new kernel, boot up
>
> - make sure pixel clock is running using scope
>
> - set LCCR values to make timing like datasheet values, use scope to chec=
k
>
> - if no data sheet is available (I have not done this; I would buy an
> LCD only if a data sheet was available from somewhere), start out by
> setting PCD so that FCLK is about 60 Hz, as seen on a scope. Next, set
> HSW, BLW, and ELW to about 1uS. Set VSW, EFW, an BFW to 0. Now if
> nothing is working, try changing PCP, VSP, HSP, and OEP one at a time,
> then in various combinations.
>
> If you know the resolution of the panel and have a connector pinout for
> it, you have a non-trivial chance of getting it working. If you don't
> even know the panel pinout, I think it would take a huge amount of time
> and probably some burned out panels before you got anywhere.
>
> Hope that helps,
> -Holly
>
>
> Mark Wiesbock wrote:
>
> >Hello,
> >
> >We have order and now have, the ALPS LCD display listed on the Display
> >page on gumstix.org. It looked like a good LCD for the price, and the
> >pictures from
> http://hubbard.engr.scu.edu/embedded/lcd/lfh8p4032b/lfh8p4032b.html
> >looked like a pretty good sign as well, but so far we haven't had much
> >luck getting the screen working.. or finding the proper timing
> >parameters in general.
> >
> >Does anyone have any methods or ideas on how to go about getting this
> >screen up and running? Is manually just changing the timing values the
> >only option, or is there some way we could use an oscilloscope or
> >other equipment in order to get some results?
> >
> >As well, does anyone have any file-system images we would be able to
> >throw on our gumstix that would be able to get a picture loaded into
> >the frame buffer easily, so just in case we do have to go about the
> >manual procedure with the timing, at least we would know there is
> >something on the display to see?
> >
> >Thanks for all your help,
> >-Mark
> >
> >
> >-------------------------------------------------------
> >SF.Net email is sponsored by:
> >Tame your development challenges with Apache's Geronimo App Server.
> Download
> >it for free - -and be entered to win a 42" plasma tv or your very own
> >Sony(tm)PSP.  Click here to play: http://sourceforge.net/geronimo.php
> >_______________________________________________
> >gumstix-users mailing list
> >gum...@li...
> >https://lists.sourceforge.net/lists/listinfo/gumstix-users
> >
> >
>
>
>
> -------------------------------------------------------
> SF.Net email is sponsored by:
> Tame your development challenges with Apache's Geronimo App Server. Downl=
oad
> it for free - -and be entered to win a 42" plasma tv or your very own
> Sony(tm)PSP.  Click here to play: http://sourceforge.net/geronimo.php
> _______________________________________________
> gumstix-users mailing list
> gum...@li...
> https://lists.sourceforge.net/lists/listinfo/gumstix-users
>

Re: [Gumstix-users] Find LCD timing for the ALPS on gumstix.org

[David D. <dd...@gm...>]

I'm going to work on this too once I get the alps lcd panel next week. If
you do come up with the proper values I would appreciate it if you added
them to the wiki.

-David

On 11/10/05, Mark Wiesbock <mwi...@gm...> wrote:
>
> Thanks Holly!
>
> I do have pinouts and resolution at least, so that gives me some
> chance. The link on the gumstix display page leads me here:
> http://hubbard.engr.scu.edu/embedded/lcd/lfh8p4032b/lfh8p4032b.html
>
> Im suprsied that when they made the page, they didnt list some of
> those values, since they obivously are not in the datasheets provided.
> If we do end up getting these values, Ill make sure to post them up on
> the tikiwiki.
>
>
> -Mark
>
> On 10/11/05, Holly Gates <hg...@ei...> wrote:
> > I'm sure I will be less useful to you since I have not worked with that
> > particular display. But in general what I do for an active display is:
> >
> > - get the fb set up to the right size, as described on the wiki page.
> > Probably this will be just the resolution of your screen. If you don't
> > know it, start out with something bigger than you think the screen is.
> >
> > - install new kernel, boot up
> >
> > - make sure pixel clock is running using scope
> >
> > - set LCCR values to make timing like datasheet values, use scope to
> check
> >
> > - if no data sheet is available (I have not done this; I would buy an
> > LCD only if a data sheet was available from somewhere), start out by
> > setting PCD so that FCLK is about 60 Hz, as seen on a scope. Next, set
> > HSW, BLW, and ELW to about 1uS. Set VSW, EFW, an BFW to 0. Now if
> > nothing is working, try changing PCP, VSP, HSP, and OEP one at a time,
> > then in various combinations.
> >
> > If you know the resolution of the panel and have a connector pinout for
> > it, you have a non-trivial chance of getting it working. If you don't
> > even know the panel pinout, I think it would take a huge amount of time
> > and probably some burned out panels before you got anywhere.
> >
> > Hope that helps,
> > -Holly
> >
> >
> > Mark Wiesbock wrote:
> >
> > >Hello,
> > >
> > >We have order and now have, the ALPS LCD display listed on the Display
> > >page on gumstix.org <http://gumstix.org>. It looked like a good LCD fo=
r
> the price, and the
> > >pictures from
> > http://hubbard.engr.scu.edu/embedded/lcd/lfh8p4032b/lfh8p4032b.html
> > >looked like a pretty good sign as well, but so far we haven't had much
> > >luck getting the screen working.. or finding the proper timing
> > >parameters in general.
> > >
> > >Does anyone have any methods or ideas on how to go about getting this
> > >screen up and running? Is manually just changing the timing values the
> > >only option, or is there some way we could use an oscilloscope or
> > >other equipment in order to get some results?
> > >
> > >As well, does anyone have any file-system images we would be able to
> > >throw on our gumstix that would be able to get a picture loaded into
> > >the frame buffer easily, so just in case we do have to go about the
> > >manual procedure with the timing, at least we would know there is
> > >something on the display to see?
> > >
> > >Thanks for all your help,
> > >-Mark
> > >
> > >
> > >-------------------------------------------------------
> > >SF.Net email is sponsored by:
> > >Tame your development challenges with Apache's Geronimo App Server.
> > Download
> > >it for free - -and be entered to win a 42" plasma tv or your very own
> > >Sony(tm)PSP. Click here to play: http://sourceforge.net/geronimo.php
> > >_______________________________________________
> > >gumstix-users mailing list
> > >gum...@li...
> > >https://lists.sourceforge.net/lists/listinfo/gumstix-users
> > >
> > >
> >
> >
> >
> > -------------------------------------------------------
> > SF.Net email is sponsored by:
> > Tame your development challenges with Apache's Geronimo App Server.
> Download
> > it for free - -and be entered to win a 42" plasma tv or your very own
> > Sony(tm)PSP. Click here to play: http://sourceforge.net/geronimo.php
> > _______________________________________________
> > gumstix-users mailing list
> > gum...@li...
> > https://lists.sourceforge.net/lists/listinfo/gumstix-users
> >
>
>
> -------------------------------------------------------
> SF.Net email is sponsored by:
> Tame your development challenges with Apache's Geronimo App Server.
> Download
> it for free - -and be entered to win a 42" plasma tv or your very own
> Sony(tm)PSP. Click here to play: http://sourceforge.net/geronimo.php
> _______________________________________________
> gumstix-users mailing list
> gum...@li...
> https://lists.sourceforge.net/lists/listinfo/gumstix-users
>