Running Pico DLP projector from non-beagle board platform

I know Texas Instruments' Pico projector kit was designed specifically
to work with the Beagle Board, but I would like to use it with my Mac
or PC.
Simply plugging it into the DVI output of a video board does not work.
Does anyone know if it is possible to get this to work yet?
Thanks very much for your help.
B.

i've been trying much the same thing, except using a high-end video
signal generator to pump what should be a valid test pattern into the
projector, and i've still had no luck. if i manage to pull it off,
i'll let you know how i did it.

rday

Thanks for your mail -

I made some progress: starting up my mac with two monitors, setting the
second monitor to 640x480, 60Hz, then unplugging it and plugging in the pico
worked stable once, but failed to repeat: the computer detects the change of
monitor (unplugging it), does not recognize the pico and then sets the
screen mode back to single screen. In the interim, the pico works, but just
for a dozen seconds.
I hope to solve with a little box I just ordered which simulates a DVI-D
monitor, so the computer should always think there is a genuine monitor
there. then the little box relays the DVI-D out, so should drive the Pico.
ALternative option is a DVI-D splitter cable, which will have one real
monitor (set to 640x480, 60Hz) on one, and the pico on the other connector.
Have you tried these options?
I will as soon as the parts come in, and will let you know when this solves
the problem.
Best,

b.

as i mentioned in an earlier post, i used this video signal
generator:

  http://www.quantumdata.com/products/882E.asp

to try to generate the appropriate test pattern signal to the pico.

  from the docs, it appears that the pico wants

  * VGA@60Hz
  * Horizontal: 31.5kHz
  * Pixclock: 27MHz

  however, if i read the user's guide for that signal generator (long,
scroll all the way down to appendix D), if i restrict myself to the
predefined settings of progressive scan VGA, i can get this choice of
"480p#KA":

  * VGA@59.94Hz
  * 31.469kHz
  * 24.545454MHz

which i don't think is going to cut it. there's also, under VESA DMT
Formats, the choice of "DMT0660":

  * VGA@60Hz
  * 31.5kHz
  * 25.2MHz

which also doesn't seem to work.

  so if anyone can look at the format reference list for that
generator and make a recommendation, i'd love to hear it. when i next
get my hands on it, i think i can tweak the settings manually, but
what kind of latitude do i have in terms of getting "close"? is there
something else i am completely overlooking here? thanks.

rday

Which box? Do you have a link?

Robert

2009/2/6 Robert P. J. Day <rpjday@crashcourse.ca>

as i mentioned in an earlier post, i used this video signal
generator:

http://www.quantumdata.com/products/882E.asp

to try to generate the appropriate test pattern signal to the pico.

from the docs, it appears that the pico wants

  • VGA@60Hz
  • Horizontal: 31.5kHz
  • Pixclock: 27MHz

however, if i read the user’s guide for that signal generator (long,
scroll all the way down to appendix D), if i restrict myself to the
predefined settings of progressive scan VGA, i can get this choice of
“480p#KA”:

  • VGA@59.94Hz
  • 31.469kHz
  • 24.545454MHz

which i don’t think is going to cut it. there’s also, under VESA DMT
Formats, the choice of “DMT0660”:

  • VGA@60Hz
  • 31.5kHz
  • 25.2MHz

which also doesn’t seem to work.

so if anyone can look at the format reference list for that
generator and make a recommendation, i’d love to hear it. when i next
get my hands on it, i think i can tweak the settings manually, but
what kind of latitude do i have in terms of getting “close”? is there
something else i am completely overlooking here? thanks.

Does the projector respond when you read the EDDID, this is an I2C read down the DDC lines in the DVI cable?

The EDDID should define what video formats the “Sink” supports the Quantum can then limit the list of formats to those that are supported by the sink device. It is also possible to save the EDDID to a file and examine it’s contents.

You might also want to check the value of the HPD (Hot Plug Detect) line which is used to detect the presence of a TV/Sink, the Quantum can be set to ignore this value I think.

Regards, Michael

There's is no EDID in the pico.

regards,

Koen

2009/2/7 Koen Kooi <koen@beagleboard.org>

Does the projector respond when you read the EDDID, this is an I2C read down the DDC lines in the DVI cable?

There’s is no EDID in the pico.

An EDID EEPROM would make it interoperate a lot better, don’t suppose there is a footprint for one on the board.

Michael

I'd also like to try to get this projector working from my PC. I'm
using ubuntu, as there's no EDDID, the nvidia card doesn't detect the
projector automatically.

I'm currently trying to use the HDMI port on my laptop but I'll try to
use a DVI-D -> HDMI cable when I get home.

Anyone else had any luck?

-Ben

I fiddled with some ModeLines in Xorg in order to get the DLP working
on my Linux box. I only managed to make the PICO DLP spash screen
disappear. When I start Xorg, the nice 4:3 rectangle gets less bright
and in the bottom I see two sort of spots in Red and Blue.

sdsc