Re: [Gumstix-users] Gumstix PSP LCD

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

On Jun 22, 2007, at 1:26 PM, Julien Lebot wrote:

> Quoting Eric Heinemann <e_h...@ya...>:
>
>> Does that mean a breakout board release is imminent?
>>
>> -Eric
>>
>
> I would guess it's nearly ready ^^
> @ Craig: My clock was wrong, I missed a 0 (!). Now I've got good
> timings that agree with the datasheet, thanks.
> Still nothing is displaying, there are nothing on the signals pins. =20=

> I'm
> updating  from 1352 to your latest revision and I will test again.

After loading the pxafb module, do this:

dd if=3D/dev/urandom of=3D/dev/fb0 bs=3D272 count=3D960

That will fill the framebuffer with "noise" so you should see colored =20=

speckles on the screen.

> Just a bit off-topic, sharp has released some time ago a new screen,
> quoting the datasheet:
> "This module is a color transflective and active matrix LCD module
> incorporating CG-Silicon TFT [...] It is composed of a color TFT-LCD
> panel, driver ICs
> (with control Function), an FPC(with DC-DC Converter), a back light, a
> touch panel and a back sealed casing.
>   It is composed control circuit. Graphics and texts can be displayed
> on a 480=D73=D7640 dots panel with
> 262,144 colors by supplying."
>
> The fpc is slightly different, so it would require some change in the
> design but still, this LCD looks perfect to hook with an Audiostix2
> with the touchscreen support !
> The panel reference is LS037V7DW01, you can check on Sharp's website
> for the datasheet. The only thing that can be problematic is the =20
> price,
> which was, when I checked through the official dealers, above 100$US.

The screen we're settling on looks like it's 99% going to be the =20
Samsung equivalent of the Sharp screen, which merges the Sharp's 3 =20
ribbon cables (signal, power, and touchscreen) into a single ribbon, =20
but the screen is otherwise basically identical.  It looks like LG =20
has an exact cross for this Samsung part too.  We'll be revising the =20
console-vx to add this connector (and all the required voltage-=20
shifting logic), as well as creating a new audiostix-vx (which =20
doubles as gpsstix-vx) which has the connector, as well as putting =20
the connector on the upcoming GPRSstix.  ETA on this boards varies, =20
but basically they're all "this summer"

C=