Many of you have asked for a touchscreen version of my PSM (Propeller System Module)...·
I was in the middle of prototyping such a thing when (like mana from heaven) someone approached me with large quantities of very low cost 4.3" microreflective touchscreen LCD displays!·
This was just too good of an opportunity to pass up, so I dropped everything to see if I could make this work...·
Those of you at the Expo may have seen me happily·
demonstrating a prototype board with functioning display.·
These displays will soon be for sale on my website.·
There are two varieties:·
"As New" and "Used".·
The "As New" ones have had their touchpanels replaced and really are as good as new.· These will cost ~$30
("As New" displays being held for PSB boards).·
The "Used" ones may have a few minor blemishes but will cost less.
Of course, there will soon be a board for it too, tentatively called PSB (Propeller System Board) [noparse][[/noparse]because it will be bigger with more stuff on it].·
There may also be a barebones adapter to get this working at minimal cost...
I think you'll find that these displays are perfect for many applications...·
They are large enough to use the touchpanel effectively for input, but not too big for embedded apps or controls.·
The microreflective technology makes them ideal for indoor and outdoor use (you can see it in direct sunlight).·
I'm going to provide full details (schematics and code) on how to interface these displays to the Prop.··
I have modified·
the standard VGA driver so that we can show text and images on the display.
Here's a photo of my prototype with a test app that puts color bars on the display with 14 Hz refresh rate (slow because·
not using the Prop's video generator).·
The I2C touscreen controller is working as is the backlight controller.·
Also, I post the datasheet again here.·
Note that these are from a very large, well-known company.··
it's better for them if I don't use their trademarks or logos when advertising these, so I'm not using their·
name and I've redacted company specific info from the datasheet.)·
Update: A used screen is now free with breakout board or PSB purchase.
If you wish to order some, send an email to firstname.lastname@example.org
with your your order.
Due to limited supply, LCDs are now only sold with a breakout board, but you may get up to 2 LCDs for each breakout board.
Breakout boards are $30.
(SMT Connectors are also available $1 each...)
Shipping within US is $5 (via USPS Priority Mail).···
Email me regarding larger quantities...
Revised source code for Paint and VGA demo apps on page 10!
Breakout board schematics and layout on page 4!
Andrew of WBA Consulting has compiled a shorter version of this thread here: compacted thread is here
More information is posted on my website:
My Prop Info&Apps: ·http://www.rayslogic.com/propeller/propeller.htm
Post Edited (Rayman) : 12/20/2009 1:13:54 PM GMT