Re: what is /dev/??? for the parellel port ? escputil
On Tuesday 04 February 2003 9:41 pm, Donald Spoon wrote:
> Dave Selby wrote:
> > On Tuesday 04 February 2003 8:47 pm, you wrote:
> >>Thus spake Dave Selby (dave_arahan@yahoo.co.uk):
> >>>Hi, Ive started using escputil to check and clean my print heads, it
> >>>works great but I also need to check the ink level, apparently I need to
> >>>access the printer directly by defining the rew device, ie,
> >>>
> >>>escputil --ink-level --raw-device /dev/???
> >>>
> >>>My printer is an epson stylus C60, using the parellel port.
> >>>As a guess I tried par0
> >>
> >>The linux equivalent of LPT0 is /dev/lp0
> >
> > Many thanks, looked real promising with great hope I re-tryed it but lp0
> > gives ...
> >
> > test@debian:~$ su
> > Password:
> > debian:/home/test# escputil -r /dev/lp0 -i
> > Escputil version 4.2.0, Copyright (C) 2000-2001 Robert Krawitz
> > Escputil comes with ABSOLUTELY NO WARRANTY; for details type 'escputil
> > -l' This is free software, and you are welcome to redistribute it
> > under certain conditions; type 'escputil -l' for details.
> >
> > Cannot read from /dev/lp0: Invalid argument
> > debian:/home/test#
> >
> > So looks like I have another problem apart from using the wrong /dev/
> > !!!! Dave
>
> Make sure all your hardware ports and connectors are rated for
> IEEE-1284. This spec is needed for 2-way communications between the
> printer and computer via the parallel port. The most common mistake is
> not using an IEEE-1284 rated connecting cable. The "standard" cable
> only provides 1-way comm from the computer to the printer in general
> terms. This shouldn't be a problem with recent computer ports or
> recently manufactured printers. You can easily still purchase a
> "standard" cable.
>
> Cheers,
> -Don Spoon-
Hi mate, Under windows 98, yuk !!, the pucker epson driver gets the info on
ink levels etc AOK, so I guess the cable is AOK
The computer is 3 yr old, ie obsolete !!, the printer 1 year old.
ls -al /dev/lp0 gives
debian:/home/test# ls -al /dev/lp0
crw-rw---- 1 root lp 6, 0 Mar 14 2002 /dev/lp0
debian:/home/test#
So read/write access is OK for root, even though the reported error is cannot
read from /dev/lp0
My pet theory is the epson, being a new design, uses different from what
escputil is looking for
Dave
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