Path: utzoo!attcan!utgpu!jarvis.csri.toronto.edu!mailrus!cornell!uw-beaver!rice!sun-spots-request
From: gbarker%mph.sm.ucl.ac.uk@nsfnet-relay.ac.uk (Gareth Barker)
Newsgroups: comp.sys.sun
Subject: Re: hp plotter
Keywords: Hardware
Message-ID: <29@brazos.Rice.edu>
Date: 5 Jul 89 12:05:25 GMT
Sender: root@rice.edu
Organization: Sun-Spots
Lines: 227
Approved: Sun-Spots@rice.edu
X-Sun-Spots-Digest: Volume 8, Issue 63, message 4 of 14

I think your problem may be with flow control - the first buffer gets sent
properly and the HP then tries to use RTS/CST to tell the sun to wait a
bit.  The sun ignores this and then ... The way out is to tell the HP to
use XON/XOFF flow control (and also apply YAPT 5.??? if your running SunOs
4.0.1).  Below are our printcap entry and two simple filters that do what
is required for our Roland plotter, which is supposed to be a HP clone -
you may need to check the HP manual to make sure that all the escape codes
are correct.  (Thanks to Brian Utterback for the original filters based
are based on).

plt|plotter|dxy990:\
		:sh:\
		:lp=/dev/ttya:\
		:sd=/var/spool/pltd:\
		:lf=/var/adm/pltd-errs:\
		:af=/var/adm/pltd-acct:\
		:br#9600:\
		:fc#0177777:\
		:fs#0000001:\
		:if=/local/filters/plotter_iffil:\
		:xc#0177777:
		:xs#0000040:
#

^^^^^^^^ make sure this is a  <tab>

#! /bin/sh
# This is a shell archive.  Remove anything before this line, then unpack
# it by saving it into a file and typing "sh file".  To overwrite existing
# files, type "sh file -c".  You can also feed this as standard input via
# unshar, or by typing "sh <file", e.g..  If this archive is complete, you
# will see the following message at the end:
#		"End of shell archive."
# Contents:  Makefile plotter_iffil.c plotter_offil.c
# Wrapped by gareth@titan on Wed Jul  5 11:48:29 1989
PATH=/bin:/usr/bin:/usr/ucb ; export PATH
if test -f 'Makefile' -a "${1}" != "-c" ; then 
  echo shar: Will not clobber existing file \"'Makefile'\"
else
echo shar: Extracting \"'Makefile'\" \(109 characters\)
sed "s/^X//" >'Makefile' <<'END_OF_FILE'
XCFLAGS = -O
XOBJS = plotter_offil plotter_iffil 
X
Xinstall : $(OBJS)
X	strip $(OBJS)
X	mv $(OBJS) /local/filters
END_OF_FILE
if test 109 -ne `wc -c <'Makefile'`; then
    echo shar: \"'Makefile'\" unpacked with wrong size!
fi
chmod +x 'Makefile'
# end of 'Makefile'
fi
if test -f 'plotter_iffil.c' -a "${1}" != "-c" ; then 
  echo shar: Will not clobber existing file \"'plotter_iffil.c'\"
else
echo shar: Extracting \"'plotter_iffil.c'\" \(1761 characters\)
sed "s/^X//" >'plotter_iffil.c' <<'END_OF_FILE'
X/*
X    iffil, a printcap filter for Roland DXY-990 plotter/ HP 7475 plotter
X
X    Written by Brian Utterback
X    December 1987
X
X	Modified GJB 25/1/89
X*/
X
X#include <stdio.h>
Xmain(argc,argv)
Xint argc;
Xchar *argv[];
X{
X    int c,atoi();
X    int contr,width,length;
X    int nlines=0,npages=2;
X    FILE *fopen(), *fp;
X    char *cp,*indent;
X    char *logi,*host,*actf;
X
X    while (--argc) {
X        if (*(cp = *++argv) == '-' ) {
X            switch (cp[1]) {
X            case 'w':
X                width = atoi(&cp[2]);
X                break;
X
X            case 'l':
X                length = atoi(&cp[2]);
X                break;
X
X            case 'c':
X                contr++;
X                break;
X
X            case 'i':
X                indent = &cp[2];
X                break;
X
X            case 'n':
X                logi = argv[1];
X                break;
X
X            case 'h':
X                host = argv[1];
X                actf = argv[2];
X                break;
X            }
X        }
X    };
X
X
X
X            printf("\033.M0;0;0;10;0;0:");      /* Reset the printer */
X            printf("\033.I256;0;17:");          /* Set buffer size and XON char */
X            printf("\033.N;19:");               /* Set XOFF char */
X            printf("\033.@;0:");                /* Turn off DTR ??? */
X 
X
X    while ( (c = getchar()) != EOF) {
X        if ( c == '\n' || c == '\r' ) nlines++;
X        if ( c == '\f' || nlines > length) {
X            nlines = 0;
X            npages++;
X        };
X        putchar(c);
X    };
X    if (access(actf, 02) >= 0 && (fp = fopen(actf,"a")) != NULL ) {
X        fprintf(fp,"%7.2f\t%s:%s\n",(float)npages,host,logi);
X        fclose(fp);
X    } else {
X        fprintf(stderr,
X            "iffil: Can't open %s\n", actf);
X        exit(2);
X    };
X}
END_OF_FILE
if test 1761 -ne `wc -c <'plotter_iffil.c'`; then
    echo shar: \"'plotter_iffil.c'\" unpacked with wrong size!
fi
chmod +x 'plotter_iffil.c'
# end of 'plotter_iffil.c'
fi
if test -f 'plotter_offil.c' -a "${1}" != "-c" ; then 
  echo shar: Will not clobber existing file \"'plotter_offil.c'\"
else
echo shar: Extracting \"'plotter_offil.c'\" \(1285 characters\)
sed "s/^X//" >'plotter_offil.c' <<'END_OF_FILE'
X/*
X    offil, a printcap filter for printing the header page.
X
X    Written by Brian Utterback
X    December 19878
X
X*/
X
X#include <stdio.h>
X#include <signal.h>
X
Xmain(argc,argv)
Xint argc;
Xchar *argv[];
X{
X    register char *cp;
X    register int ch;
X
X    /* 'of' filters are only passed width and length arguments from lpd */
X    while (--argc) {
X        if (*(cp = *++argv) == '-' ) {
X            switch (cp[1]) {
X            case 'w':
X                /* this filter does nothing with width */
X                break;
X
X            case 'l':
X                /* this filter does nothing with length */
X                break;
X
X            }
X        }
X    }
X
X
X    while ((ch=getchar()) != EOF) {
X        switch(ch) {
X
X        case '\31':
X               /*
X                * LPD needs to use a different filter to
X                * print data so stop what we are doing
X                * and wait for lpd to restart us.
X                */
X                if ((ch = getchar()) == '\01') {
X                (void) fflush(stdout);
X                (void) kill(getpid(), SIGSTOP);
X
X                break;
X            } else {
X                (void) ungetc(ch,stdin);
X                ch='\31';
X            }
X        default:
X            putchar(ch);
X            break;
X        }
X    }
X        exit(0);
X}
END_OF_FILE
if test 1285 -ne `wc -c <'plotter_offil.c'`; then
    echo shar: \"'plotter_offil.c'\" unpacked with wrong size!
fi
chmod +x 'plotter_offil.c'
# end of 'plotter_offil.c'
fi
echo shar: End of shell archive.
exit 0

Hope this helps,

Gareth J. Barker,
Institute of Neurology, Queen Square,
London, UK.

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