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ssyspro
 Post subject: USB 2 LPT Converter
PostPosted: Sun Nov 30, 2003 18:15 
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Joined: Sat Nov 22, 2003 9:02
Posts: 4
I was just curious if anybody has tried to connect a display to a USB 2 LPT converter like the ones available at CableMax.

Please let me know if this is successful or not before I purchase.

If nobody has tried yet I will but would like to know if a attempt has already been made.


Link to site with converters >>>> http://www.cablemax.com/search-1-2.cfm?ss=usb+printer
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Henri
 Post subject:
PostPosted: Mon Dec 01, 2003 20:06 
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Joined: Sun May 05, 2002 22:05
Posts: 2063
Location: Lappeenranta, Finland
USB to LPT adapters often create a "software" LPT port that is only usable for printers and I don't remember anyone reporting success using these with parallel lcds. So my guess would be they won't work but who knows maybe they would...
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Relampago
 Post subject:
PostPosted: Mon Dec 01, 2003 20:17 
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Joined: Tue Feb 18, 2003 23:28
Posts: 78
there are some converters that are basing on cypress an2135/31....
The Problem: Only available in japanese
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kapone
 Post subject:
PostPosted: Fri Apr 22, 2005 9:26 
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Joined: Thu Apr 21, 2005 17:35
Posts: 5
Location: sweden,öland
then lets 100 from japan and sell the i think its many who would buy then i would but 2 1 for my 320x240 and one matbe for the future if i get a 640x400 lcd :P
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jeremy
 Post subject:
PostPosted: Sat Apr 01, 2006 4:38 
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Joined: Sat Apr 01, 2006 4:10
Posts: 2
Location: Australia
I know this is an old post but it is fairly important.

If you have access to a cypress programmer and know someone that can make smd pcbs then you can make a fully emulated usb->parallel port adapter. Check it out here.
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Michael
 Post subject:
PostPosted: Sat May 19, 2007 16:27 
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Joined: Mon Jun 20, 2005 23:03
Posts: 161
Location: Hong Kong
jeremy wrote:
I know this is an old post but it is fairly important.

If you have access to a cypress programmer and know someone that can make smd pcbs then you can make a fully emulated usb->parallel port adapter. Check it out here.



Having used this firmware (usb2lpt2.iic) with one if these boards http://3layer.eu/development.html I could hardly recommend this converter.
In one test, using WinIO/LPT and a KS based 128x64 LCD (with CMD/Data delays removed) I could achieve around 300fps but with the above converter this dropped to around 35fps, and in some cases ~2fps

Bastelecke's converter is fine if all you're doing is basic printing or JTAG/PIC programming but with anything requiring a stream of data then forget it.

_________________
myLCD - An LCD framebuffer library
(KS0108, PCD8544, SED1565, SED1335,
Nokia Colour LCD's, T6963C, TCP/IP, etc..)
http://mylcd.sourceforge.net/
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