[visionegg] Re: paralle port: voltage measured by oscilloscope
- From: Pallier Christophe <pallier@xxxxxxxxxxxxx>
- To: visionegg@xxxxxxxxxxxxx
- Date: Mon, 3 Feb 2003 18:18:02 +0100 (MET)
On Mon, 3 Feb 2003, Christoph Lehmann wrote:
> thank, Christophe. But I work with LINUX. Do you have a linux version
> (binaries?)
Actually, the floppy image is bootable (it uses freedos to avoid DOS
copyright). So, just copy the image to a floppy (with 'dd' under linux,
or rawwrite under DOS/windows), and boot from the floppy. Type 'lpt' and
voila, you should see the parallel port pin values.
It is not complex to scan the lpt with Linux (see for example the code
at the end of the html page given in the previous post), BUT, with a stock
linux kernel, you can miss fast transient states on the lpt (if they last
, e.g., less than 10 msec)....
Christophe Pallier
www.pallier.org
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