Source: RedFathom ( https://www.youtube.com/watch?v=r_lm1kRa1Fs&list=PL5xraSSdWblzadOLVWeN4_n3uh4AEigfe )
His sources:
Teensyduino microcontroller
http://www.pjrc.com/store/teensy.html
LVDS controller
http://www.ebay.com/sch/m.html?_odkw=&_ssn=goldpart&_nkw=gm5621
Bongofish
http://wiki.bongofish.co.uk/doku.php?id=bongofish:penenabled
Waxbee code
http://code.google.com/p/waxbee/
Teensyduino is used for serial-usb conversion of the tablet. (RedFathom)
The tablet uses a teensyduino 2.0 loaded with the waxbee
script. it's just wired between D1&D2 on the teensy and
9-Rxd&10-Txd on the tablet. of course gnd-gnd vcc-vcc. i'll have to
post my configuration file probably. you can find everything you need on
the bongofish website it's where i found most of the info to do this.
you'll probably have to take the tape off the cable since the colors
vary. (RedFathom)
Model : HP TC4400 tablet
May 1, 2014:
Ordered LVDS controller (gm5621) off ebay.
Ordered teensy (2.0 without pin) off www.pjrc.com/store/teensy.html
Studied bongofish website, corresponding WACOM model# : SU-025-C02
there are 2 types for the pins, 10 or 14 pins.
For 14 pins, identify gnd(P1 or P2), vcc(P13), usb data+(P4), usb data -(P3).
For 10 pins, identify gnd(P6), vcc(P1), rxd tab->host @19200baud (P2), txd tab<-host (P3)
**txd description is different in bongofish website, but i believe this is the correct way.
TBC...
Hi,
ReplyDeleteHow did you do with this project? I have got an HP TX2500 and am planning to do the same thing with its penabled monitor.
have you got any other sourcess you had discovered since writnig this blog?
Thanks,
This project went down since the cost of project exceeded getting a small lcd made specifically for raspberry pi.
ReplyDeleteTry one of these full kits which will save you time in looking for cables and correct power supply.
http://www.ebay.ca/itm/M-NT68676-2A-HDMI-DVI-VGA-Audio-LCD-Controller-Board-DIY-Kit-Power-Adapter-/121059321784?hash=item1c2fb2a7b8
You can PM the seller and specifically ask about the compatibility.
Good luck!