LCD + Touchscreen for BeagleBoard

GoogleGroups
21

That should work.

Gerald

22

Hi Sean,

Sure, send me your schematics. BTW, I would like to see support for a 4 wire
touch screen controller connected (TSC2046) which is then connected to a
mcspi interface. Here I do think you will need level translators since the
TSC2046 is running at 3v3.

Regards,

From: beagleboard@googlegroups.com
[mailto:beagleboard@googlegroups.com] On Behalf Of Sean D'Epagnier
Sent: Monday, December 01, 2008 5:11 PM
To: beagleboard@googlegroups.com
Subject: [beagleboard] Re: LCD + Touchscreen for BeagleBoard

hdmi->parallel is already 3.3v so you wouldn't need the translators.
I plan to support this configuration. Let me know if you would like
to review my schematics or layouts.. I'm going to order them probably
tomorrow.

Sean

>
> Hi Sean,
>
> When you say parallel, is this compatible with the PSP display? If so,

could

23

I have the following components which can be ordered online already:
hdmi->vga ($30)
vga->40 pin parallel and lcd backlight driver ($30)

Is the hdmi->vga do an actual digital to analog conversion on the
signal? If so, where did you find one for $30?

Thanks.

24

It is not. The signal provided by Beagle is DVI-D, not VGA. The analog component is not provided by the Beagle…

Gerald

25

Jeremy

I have a device which converts DVI-D to VGA. It is actually a digital
to analog converter, it is called "hdfury", search for that. I got
one for around 20 pounds from the uk. Unfortunately my HDMI to DVI-D
adapter gives female DVI-D which the hdfury also takes, so I'm still
waiting on a male to male DVI-D adapter before I can test it.

Sean

26

It is not. The signal provided by Beagle is DVI-D, not VGA. The analog
component is not provided by the Beagle..

Correct, that's why I am asking. Sean mentioned he could find a
converter for $30 but I suspect he's just talking about an adapter,
which will not work. However, if he has found a digital to analog
converter for $30 I would love to know about where to get it because
it seems the s-video out is useless until a solid kernal update is
made.

27

It is not. The signal provided by Beagle is DVI-D, not VGA. The analog
component is not provided by the Beagle..

Correct, that's why I am asking. Sean mentioned he could find a
converter for $30 but I suspect he's just talking about an adapter,
which will not work. However, if he has found a digital to analog
converter for $30 I would love to know about where to get it because
it seems the s-video out is useless until a solid kernal update is
made.

28

This is correct and why I was asking the question. If he can find a
digital to analog converter for $30, I'd love to know about where to
get it since it doesn't look like the s-video out will be useful until
the kernal is updated to support it.

29

Sorry for the triple reply, I didn't think it got sent.

30

Here they area available for ~$60US.
This is one of several places that came up using Google's shopping
search for "hdfury"

http://www.monoprice.com/products/subdepartment.asp?c_id=101&cp_id=10114

-Preston

31

Did you search for hdfury? I call that a converter, not an adapter.
It converts DVI-D input to vga output at up to 1080p.

I got a deal, it's normally more like $60, see:

http://www.monoprice.com/products/search.asp?keyword=4559

I will warn you that I have not had success yet. I do not have any
monitor which takes DVI-D or hdmi. I tried
hdmi->DVI-D->hdfury->vga->display and it didn't work. I did test the
hdfury on my friend's computer setup and it does work correctly.

I have the patched kernel which supports 800x600 (which the vga
monitor correctly works at from my laptop vga output) however the
pixel timings are different. My monitor only supports 800x600 at
60hz, the fbset command on the beagle reports 56hz, so I'm hoping it
is the timings that are causing this problem.

Sean