Would this display be compatible with the BeagleBoard-xM LCD
interface?
http://www.purdyelectronics.com/pdf/ANDpSi025TH-LED-revised.pdf
I would say no. It only has 8 Bits of data configured serialy, something I have not seen before. You might be able to put a FPGA in front of it and make it work
Gerald
...in that case, are there any 2.5" displays that are known to be
compatible?
If the display supports a RGB interface, 16b, 18b, or 24b with HSYNC, VSYNC, CLK, and EN it should work. I don’t recall any off th etop of my head, but there are a lot of them out there. The issue will be getting your ands on them and enough information abou their interface.
Gerald
Still searching for suitable displays between 2.2"-2.6" but I did find
a seller on eBay with 3.5" 320x480 24-bit RGB displays in stock and
going for only $15 that may be useful for someone else's project?
http://cgi.ebay.com/ws/eBayISAPI.dll?ViewItem&item=140493036784
I think I may have found a suitable 320x240 display, it is being
driven by the HX8218:
http://www.trulydisplays.com/tft/driveric/Driver%20IC%20HX8218.pdf
one thing that troubles me though is that the HX8218 pinout specifies
that for R0-R7, G0-G7 and B0-B7 the LSB is 0 and the MSB is 7, and I'm
fairly certain the BeagleBoard is the opposite? does this just mean
the wiring should be reversed to interface the two? (ie. R0 to R7, R1
to R6, R2 to R5, etc)
Beagle is not the opposite. It is the same.
Gerald
I apologise for the confusion - I was basing this on a couple of
threads in this group, one here:
http://groups.google.com/group/beagleboard/browse_thread/thread/50b224c1c002e1b8/
carefully noting that the MSB should be omitted for an 18-bit display,
and this one:
http://groups.google.com/group/beagleboard/browse_thread/thread/ddb713cdd861762c/
stating that 0 and 1 should be dropped for 18-bit, and I guess I put
the two pieces of information together in my head to mean that the
Beagle LCD interface uses 'MSB 0 bit numbering' rather than 'LSB 0 bit
numbering' - is this false?!
Thank you for any assistance you can offer...
Well, I base it on the guy that designed the board. When you convert to 18 bits you drop the LSB as it has the smallest impact on the overall intensity. Dropping the MSB takes a BIG chunk out of the overall range you can support. If you stick with 24bit, which this panel appears to handle, then there is no need to drop any of the bits.
Gerald