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Membris
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Joined: 01 Sep 2004
Posts: 297
Location: Murcia (Spain)
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 Posted: Wed Mar 09, 2005 3:18 pm Post subject: LCD USB - I can't get working :( |
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LCD USB - I can't get working 
Hello. I have bought an Crystalfontz LCD (634) USB, and I can't get it working :S
Before I had an Crystalfontz 2x20 with LPT port with no problems, running with lcd4linux 0.10. But with the new LCD, I follow the instructions on https://ssl.bulix.org/projects/lcd4linux/wiki/Crystalfontz
Crystalfontz provides a Linux-compatible command-line demonstration program with C source code at:
http://www.crystalfontz.com/products/632/632_634_linux.tar.gz
I compiled it and run with port /dev/tts/0 and the output seems to be successful but the LCD doesn't show anything. With lcd4inux I have tried all possible ports with the same results.
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# ./test632_634 /dev/tts/0 1900
Ultra-simple CFA-632 / CFA-634 command-line communications example.
Crystalfontz America, Inc. http://www.crystalfontz.com
Usage:
./test632_634 PORT BAUD
PORT is something like "/dev/ttyS0" or "/dev/usb/ttyUSB1"
BAUD is 1200, 2400, 4800, 9600 or 19200
To clear the display, enter "clear" as an optional third parameter
Serial_Init:: success
"/dev/tts/0" opened at "19200" baud.
Done.
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At system boot, the LCD backlight lights and shows a presentation text, but after only shows a "console cursor".
I have pl2303 and usb already charged, in fact when I plug the LCD, I receive this output:
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Mar 9 16:12:30 [kernel] usb 4-1: new full speed USB device using uhci_hcd and address 2
Mar 9 16:12:30 [kernel] usb 4-1: Product: Crystalfontz CFA-634 USB LCD
Mar 9 16:12:30 [kernel] usb 4-1: Manufacturer: Crystalfontz
Mar 9 16:12:30 [kernel] usb 4-1: SerialNumber: CFC850NR
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I'm very frustrated, some solution?
PD: Excuse my bad english, I'm spanish 
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No por mucho madrugar verás a las vacas en camisón. |
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SimonKellett
Tux's lil' helper
Joined: 17 Dec 2003
Posts: 88
Location: Darmstadt, Germany
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| Posted: Thu Mar 10, 2005 10:54 am Post subject: |
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I am not sure about this hardware: I have a Matrix Orbital USB and have these options in my kernel:
CONFIG_USB=y
CONFIG_USB_ARCH_HAS_HCD=y
CONFIG_USB_ARCH_HAS_OHCI=y
CONFIG_USB_UHCI_HCD=m
CONFIG_USB_SERIAL=y
CONFIG_USB_SERIAL_FTDI_SIO=y
Do you have/need the FTDI_SIO ? (the MO display is actually a serial device with an onboard converter to provide USB.)
http://home.arcor.de/zoxed/matrix_orbital_lk202.html |
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Membris
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Joined: 01 Sep 2004
Posts: 297
Location: Murcia (Spain)
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| Posted: Thu Mar 10, 2005 3:32 pm Post subject: |
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| Quote: | | CONFIG_USB_SERIAL_FTDI_SIO=y |
I think that's an important detail... until now I was using pl2303 because on the lcd4linux homepage...
https://ssl.bulix.org/projects/lcd4linux/wiki/Crystalfontz
| Quote: | | The USB versions simply use an USB-to-serial converter (probably pl2303), and use the same protocol as on the serial port. |
But in the CrystalFontz forums seems that it's FTDI the serial converter used by 634 USB.
I am going to try FTDI instead of pl2303 and more later I tell you 
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Membris
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Joined: 01 Sep 2004
Posts: 297
Location: Murcia (Spain)
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| Posted: Fri Mar 11, 2005 12:44 am Post subject: |
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Yeah, FTDI was the solution, now my LCD it's correctly allocated at /dev/usb/tts/1 
But now I have more problems... when I use CrystalFontz test program (Linux native) or lcdlinx, I see a lot of garbage on display, strange characters.
A photo:
http://giingo.org/images/lcd_linux.jpg
Some solution?
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Membris
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Joined: 01 Sep 2004
Posts: 297
Location: Murcia (Spain)
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| Posted: Fri Mar 11, 2005 1:01 am Post subject: |
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OK, I now have LCD working!
The problem was the baudrate, datasheet of Crystalfontz indicates 9600 but my module only worked at 19200.
Thanks by your post
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