USB Palm OS Device as an LCD Display
This article based on work done by Ramuk at Linkstationwiki.org
|These instructions are essentially for a USB LCD Display, a USB docking Palm-OS device can emulate a USB LCD interface so that no external adapter is needed. The same instructions could be used with some modification to add an LCD with: Add a Serial port to the PowerPC Linkstation as a matter of fact someone on the kurobox wiki has done just that|
This article is for people that want to add an LCD display to their Linkstation but don't want to crack it open, and happen to have a USB cabled Palm OS  device lying around. Using PalmOrb  you can emulate an external (20x4),(40x4) or (26x16) character LCD display.
This article assumes that you have installed FreeLink. A 2.6 Kernel Upgrade to the 2.6-kernel (ppc only) has better USB support, but a 2.4 Kernel would probably work as well. For these instructions you will need a USB cabled Palm-OS Device.
- Install PalmOrb on your USB cabled Palm-OS Device. The v1.1a4 version has the most font options for a (20x4) emulated LCD, there are several other versions available on Sourceforge. It emulates a Matrix Orbital LK204-25 LCD.
Configure the PalmOrb app to use the USB Port: Menu -> Options -> Serial:Device:USB
- Install and remove LCDproc using apt-get (this should take care of any dependencies) The Debian Stable Version only has the LCDd Daemon program but not the lcdproc client, so you'll have to install lcdproc from a tarball. Kind of an ugly solution to get the dependencies resolved, but it works:
apt-get install lcdproc apt-get remove lcdproc
- Get the LCDProc tarball and compile/install it. Make sure you have installed the Precompiled C development environment, running on the LS first.
wget http://lcdproc.omnipotent.net/download/lcdproc-0.4.5.tar.gz tar -xvzf lcdproc-0.4.5.tar.gz cd lcdproc-0.4.5 ./configure make make install
- Use these instructions to configure LCDProc to run with PalmOrb properly make sure that the MtxOrb part of /etc/LCDd.conf looks at least a little something like this:
........ [MtxOrb] # Matrix Orbital driver # Select the output device to use [/dev/lcd] device=/dev/ttyUSB0 #device=/dev/usb/tts/1 #device=/dev/ttyS1 # Set the display size [20x4] size=20x4 ........
- You may have to initiate the appropriate module for the palm
- Attach the USB enabled Palm-OS device and start the PalmOrb app. Do a dmesg of your linkstation; if things went well you should see lines like this at the end:
usb 3-1: Handspring Visor / Palm OS converter now attached to ttyUSB0 usb 3-1: Handspring Visor / Palm OS converter now attached to ttyUSB1
- Run the LCDd (LCDproc Daemon) and LCDproc client with some options to see if it works.
LCDd & lcdproc C M X
- Hopefully you got some output on the Palm-OS device as an LCD. For other clients Google:lcdproc to see what other LCDProc clients you can find. Or just go here
What's the point?
|Palm as Terminal (untested)|
|Enable terminal access with this command: getty -h -L ttyUSB0 9600 vt100, and use a terminal program like ptelnet|
Well if you happen to have a USB enabled older Palm OS PDA lying around and want an external LCD display for the price of nothing, now you have it!
#!/bin/sh # lcdmon.sh # Kill any LCDd that are running first, Start the Daemon and # fork it to the background. Then run LCDProc with the Time option and # fork it to the background. # You can run lcdproc -? alone to see what options there are. # Run another client: netlcdclient which gives U/Dl speed # You could run this script at startup. killall LCDd LCDd & lcdproc T & netlcdclient -i eth0 -a LinkSTN -d
- www.crystalfontz.com CFA-635 USB LCD
- LCDKuro - Add a Display and Keyboard to your Kurobox
- The NSLU2-Linux project where this idea was hijacked from: Palm as LCD-Display or terminal
- The Wikipedia: Palm OS devices
- The PalmOrb Page: SourceForge:PalmOrb
- Sourceforge.net: palmorb - alpha/beta releases Latest v1.1a4
- Sourceforge.net: PalmOrb
- The LCDproc home: LCDproc
- How do I configure LCDproc for PalmOrb?
- Handspring−Visor with Linux mini−HOWTO by Ryan VanderBijl
- LCDProc Site:Clients
- ptelnet - a powerful communication software for the Palm Computing platform
If you happen to own a dbox2, you can display a log file on the dbox's LCD -andre