Looking for open source PIC controller for Touch Screen

Thats a pretty loose spec, there.

I can tell you more about it if you can write and sell the source code. Contact me if you are interested in.

Thanks.

-B

Brian wrote:

Please post a link to the Touch Screen specifications.

Maybe I'll do it for a couple free touch screens....

Luhan

We have been using the 3M/Dynapro Analog Resistive Touch Screen Controller part number 95704 (V1.2), which is a programmed PIC16C5X microcontroller. The 95704 has become obsolete. The 95704 uses an external multiplexer and ADC. We are using the UPDD (V3.8) touch screen driver, which runs in embedded XP and has the following hard coded settings: Model 3M SC3 Serial Baud rate 2400 Parity None Data bits 8 Stop bit 1

The RS-232 Protocol is a three byte protocol:

Byte B7 B6 B5 B4 B3 B2 B1 B0

1 1 P X9 X8 X7 Y9 Y8 Y7 (P : 0 Pen-up, 1 Pen-down) 2 0 X6 X5 X4 X3 X2 X1 X0 3 0 Y6 Y5 Y4 Y3 Y2 Y1 Y0

While we have been investigating replacement controllers, there is a business case for trying to see if we can find a form, fit, and function replacement for the 95704. Specifically, continued support of systems with the UPDD driver in this configuration and continued production of the current board.

Luhan wrote:

So there will be some forensic engineering required.

--
 JosephKK
 Gegen dummheit kampfen die Gotter Selbst, vergebens.  
  --Schiller

It's quite straighforward if you have a spec !

I've half an idea I have an original Dynapro controller kicking around. It's an area I looked into ages back.

Graahmn

Trying to mimic Dynapro's method may be a little backward.

OTOH writing a new Windows driver may be the most expensive part of the project.

Do you *really* want to connect using RS-232 ? Is this an embedded product ?

Graham

We are not trying to write a driver. We want to use the same driver that's why we want to have the PIC controller mimic Dynapro controller.

Thanks.

-B

Eeyore wrote:

project.