Date: Sat, 25 Nov 2000 22:42:52 +0000 (GMT) From: "Walter C. Pelissero" <walter@pelissero.org> To: Keith Walker <kew@icehouse.net> Cc: questions@freebsd.org Subject: Problem with USB printer Message-ID: <14880.16492.311270.383061@hyde.lpds.sublink.org> In-Reply-To: <00112510022900.06194@mars.walker.dom> References: <00112510022900.06194@mars.walker.dom>
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Keith Walker writes:
> Ok, a while back (couple of days ago) I posted a question about my Epson 900
> not working when attached via the USB cable.
>
> I found the solution to the problem. Hopefully this will help others with
> Epson's that don't seem to work via the USB port.
>
> The Epson's must have an initialization string sent to them to wake up the
> beast. This string only needs to be sent once, after plugging the printer in.
> Turning off the power doesn't seem to matter, just the power cord. Anyhow,
> sending the init string once per job is sufficient and harms nothing.
Well done!
Ok. I put this line in my rc.local and even my Epson 860 works.
printf "000\033\001@EJL 1284.4\n@EJL \n" | tr 0 '\0' > /dev/ulpt0
There is only one problem left: this string is either incomplete or
not correct.
The proof is that after sending it to the printer the next printout is
corrupted. So if you print graphics you get a bounch of random chars
because of synch loss, but if you try to print a plain ASCII file
you'll miss the first few characters (I experienced something like
50-60).
I'm trying to figure out what is missing or what is superfluous in
that init string.
In the meanwhile I had a look at the Gimp Print driver and I found
this procedure:
void
initialize_print_cmd(void)
{
bufpos = 0;
if (isUSB)
{
static char hdr[] = "\000\000\000\033\001@EJL 1284.4\n@EJL \n\033@";
memcpy(printer_cmd, hdr, sizeof(hdr) - 1); /* Do NOT include the null! */
bufpos = sizeof(hdr) - 1;
}
}
That looks a little bit different from what you mentioned. I'm going
to try this version. Let's see if it changes anything.
--
walter pelissero
http://www.pelissero.org
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