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Old 11-21-2004, 11:56 PM   #1
jfbertrand
LQ Newbie
 
Registered: May 2002
Posts: 17

Rep: Reputation: 0
Problems with ttyS2


Sup?

I need to control 3 serial devices on a board (ttyS0 for touch screen, ttyS1 for bill validator, and ttyS2 for a printer) ... should be easy enough right? well not that easy, first off, it would seem that the serial driver only loads S0 and S1 on statup which after a few hours reading the setserial and rc.serial files figured out kinda how to do it. And I say kinda because ... you've guessed it, I'm asking a question here.

I get, S0 and S1 and they work great, but I can't for the life of me to get S2 to work at all, nothing.

What to do, what to do?

Thanks all for you help, and REALLY, what a great site...

Later,

JF
 
Old 11-22-2004, 03:14 AM   #2
DaneM
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Registered: Oct 2003
Location: Chico, CA, USA
Distribution: Linux Mint
Posts: 721

Rep: Reputation: 63
Hello, JF.

Not knowing which distribution you're using this is a shot in the dark, but here is my /etc/rc.d/rc.serial file from Slackware 10. I have S0 through S4 working pretty well with this arrangement. (Other distributions put this file in init.d or elsewhere.)

Code:
#
# /etc/rc.serial 
#	Initializes the serial ports on your system
#
# chkconfig: 2345 50 75
# description: This initializes the settings of the serial port
#
# FILE_VERSION: 19981128
#
# Distributed with setserial and the serial driver.  We need to use the
# FILE_VERSION field to assure that we don't overwrite a newer rc.serial 
# file with a newer one.
# 
# XXXX For now, the autosave feature doesn't work if you are
# using the multiport feature; it doesn't save the multiport configuration
# (for now).  Autosave also doesn't work for the hayes devices.  
#

RCLOCKFILE=/var/lock/subsys/serial
DIRS="/lib/modules/`uname -r`/misc /lib/modules /usr/lib/modules ."
PATH=/bin:/sbin:/usr/bin
DRIVER=serial
DRIVER_NAME=serial
MODULE_REGEXP="serial\b"

ALLDEVS="/dev/ttyS?"
if /bin/ls /dev/ttyS?? >& /dev/null ; then
	ALLDEVS="$ALLDEVS /dev/ttyS??"
fi

SETSERIAL=""
if test -x /bin/setserial ; then
	SETSERIAL=/bin/setserial
elif test -x /sbin/setserial ; then
	SETSERIAL=/sbin/setserial
fi

#
# See if the serial driver is loaded
#
LOADED=""
if test -f /proc/devices; then
	if grep -q " ttyS$" /proc/devices ; then
		LOADED="yes"
	else
		LOADED="no"
	fi
fi

#
# Find the serial driver
#
for i in $DIRS
do
	if test -z "$MODULE" -a -f $i/$DRIVER.o ; then
		MODULE=$i/$DRIVER.o
	fi
done

if ! test -f /proc/modules ; then
	MODULE=""
fi


#
#For USR5610B Modem: 
#Define location and serial port for PCI modem
#
COMMDM=/usr/local/bin/3ComMdm
COMPORT=/dev/ttyS0


#ALLDEVS="/dev/ttyS?"
#if /bin/ls /dev/ttyS?? >& /dev/null ; then
#        ALLDEVS="$ALLDEVS /dev/ttyS??"
#fi





#
# Handle System V init conventions...
#
case $1 in
start)
	action="start";
	;;
stop)
	action="stop";
	;;
*)
	action="start";
esac

if test $action  = stop ; then
	if test -n ${SETSERIAL} -a "$LOADED" != "no" -a \
           `head -1 /etc/serial.conf`X = "###AUTOSAVE###X" ; then
		echo -n "Saving state of serial devices... "
		grep "^#" /etc/serial.conf > /etc/.serial.conf.new
		${SETSERIAL} -G -g ${ALLDEVS} >> /etc/.serial.conf.new
		mv /etc/serial.conf /etc/.serial.conf.old
		mv /etc/.serial.conf.new /etc/serial.conf
		echo "done."
	fi
	if test -n "$MODULE" ; then
		module=`grep $MODULE_REGEXP /proc/modules | awk '{print $1}'`
		if test -z "$module" ; then 
			echo "The $DRIVER_NAME driver is not loaded."
			rm -f ${RCLOCKFILE}
			exit 0
		fi
		if rmmod $module ; then :; else 
			echo "The $DRIVER_NAME driver could NOT be unloaded."
			exit 1;
		fi
		echo "The $DRIVER_NAME driver has been unloaded."
	fi
	rm -f ${RCLOCKFILE}
	exit 0
fi

#
# If not stop, it must be a start....
#

if test -n "$MODULE" -a "$LOADED" != "yes" ; then 
	if insmod -f $MODULE $DRIVER_ARG ; then
          true
	else
		echo "Couldn't load $DRIVER_NAME driver."
		exit 1
	fi
fi

if test -f /etc/serial.conf ; then
        if test -n ${SETSERIAL} ; then
		grep -v ^# < /etc/serial.conf | while read device args
		do
                    if [ ! "$device" = "" -a ! "$args" = "" ]; then
                        ${SETSERIAL} -z $device $args
                    fi
		done 
	fi
else
	echo "###AUTOSAVE###" > /etc/serial.conf
fi

touch ${RCLOCKFILE}
${SETSERIAL} -bg ${ALLDEVS}
I hope this helps. Please note that I've made some changes to this file to support my 56k modem. For a detailed list of what changes I made see the HOW-TO for the USR6510B in the "answers" section of LQ.

Good luck.

--Dane
 
Old 11-22-2004, 09:49 AM   #3
jfbertrand
LQ Newbie
 
Registered: May 2002
Posts: 17

Original Poster
Rep: Reputation: 0
I'm running fedora core 2, w/ an upgraded hardware module that might affect my serial components. I'll do more research.

When I get home, I'll send you the content of my serial.conf file and whatever is in my rc.serial

also, /proc/tty/driver/serial .

Thanks,

JF
 
  


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