Re: serial port speed
On Thu, 25 Sep 1997 12:21:15 +0100 (BST), David Wright wrote: >On Wed, 24 Sep 1997, Dave Cinege wrote: > >> On Wed, 24 Sep 1997 01:23:03 +1000, Lawrence wrote: >> >> >Anyone knows the default serail port speed? It is 38,400bps? Which >> >file responsible for this setting? I want to increase it to 115,200bps. >> >> 38.4K, yes, /etc/rc.boot/0setserial, use the spd_vhi option. > >Perhaps there's some history here. I installed Debian 1.3 on a 1997 >pentium and setserial -a /dev/ttyS? all say that baud_base is 115200 >and Flags: spd_normal... >Both mgetty and minicom will satisfactorily handle 115200, so all this >messing with spd_vhi seems to be a thing of the past. Presumably, by now, >any software that can't ask for >38400 should have a bug report filed >against it. Uhhum.Some of us use redirection and piping of the serial ports. - http://www.psychosis.com/emc/ Elite MicroComputers 908-541-4214 http://www.psychosis.com/linux-router/ Linux Router Project -- TO UNSUBSCRIBE FROM THIS MAILING LIST: e-mail the word "unsubscribe" to [EMAIL PROTECTED] . Trouble? e-mail to [EMAIL PROTECTED] .
Re: serial port speed
David Wright wrote: > Perhaps there's some history here. I installed Debian 1.3 on a 1997 > pentium and setserial -a /dev/ttyS? all say that baud_base is 115200 > and Flags: spd_normal... > Both mgetty and minicom will satisfactorily handle 115200, so all this > messing with spd_vhi seems to be a thing of the past. Presumably, by now, > any software that can't ask for >38400 should have a bug report filed > against it. Unless you care about POSIX compliance. IIRC baud_base and whatever's the option to specify divisor allow you to use any clock frequency on your serial port -- as long as hardware supports it. Very neat, but non-POSIX. Which means if software relies on it, it's not POSIX compliant. Conversely, software that asks for 38400 is POSIX compliant and (hopefully) portable. So, you're suggesting that POSIX compliance is a bug, and so is portability :-) -- well, not exactly: that absence of non-standard and non-portable features is a bug. Just kidding -- Dimitri emaziuk at curtin dot edu dot au Please CC to me when replying to Usenet or a list -- TO UNSUBSCRIBE FROM THIS MAILING LIST: e-mail the word "unsubscribe" to [EMAIL PROTECTED] . Trouble? e-mail to [EMAIL PROTECTED] .
Re: serial port speed
On Wed, 24 Sep 1997, Dave Cinege wrote: > On Wed, 24 Sep 1997 01:23:03 +1000, Lawrence wrote: > > >Anyone knows the default serail port speed? It is 38,400bps? Which > >file responsible for this setting? I want to increase it to 115,200bps. > > 38.4K, yes, /etc/rc.boot/0setserial, use the spd_vhi option. Perhaps there's some history here. I installed Debian 1.3 on a 1997 pentium and setserial -a /dev/ttyS? all say that baud_base is 115200 and Flags: spd_normal... Both mgetty and minicom will satisfactorily handle 115200, so all this messing with spd_vhi seems to be a thing of the past. Presumably, by now, any software that can't ask for >38400 should have a bug report filed against it. -- David Wright, Open University, Earth Science Department, Milton Keynes MK7 6AA U.K. email: [EMAIL PROTECTED] tel: +44 1908 653 739 fax: +44 1908 655 151 -- TO UNSUBSCRIBE FROM THIS MAILING LIST: e-mail the word "unsubscribe" to [EMAIL PROTECTED] . Trouble? e-mail to [EMAIL PROTECTED] .
Re: serial port speed
On Wed, 24 Sep 1997 01:23:03 +1000, Lawrence wrote: >Anyone knows the default serail port speed? It is 38,400bps? Which >file responsible for this setting? I want to increase it to 115,200bps. 38.4K, yes, /etc/rc.boot/0setserial, use the spd_vhi option. - http://www.psychosis.com/emc/ Elite MicroComputers 908-541-4214 http://www.psychosis.com/linux-router/ Linux Router Project -- TO UNSUBSCRIBE FROM THIS MAILING LIST: e-mail the word "unsubscribe" to [EMAIL PROTECTED] . Trouble? e-mail to [EMAIL PROTECTED] .
Re: serial port speed
Lawrence <[EMAIL PROTECTED]> writes:
> Anyone knows the default serail port speed? It is 38,400bps? Which
> file responsible for this setting? I want to increase it to 115,200bps.
Most versions of unix only support specifying the modem speed up to
38400 (for historical reasons). So to specify a higher speed, you
have to tell the OS to use a higher speed when something like pppd
asks for 38400. This is accomplished with setserial, see the man page
for details, but you're looking for the spd_hi and spd_vhi options.
I put these commands in an /etc/rc.boot/0setserial-local file so that
they happen every time I boot.
# !/bin/sh
# File: /etc/rc.boot/0setserial-local
STD_FLAGS="spd_vhi"
SETSERIAL=/bin/setserial
echo -n "Local serial port config"
${SETSERIAL} -b /dev/ttyS0 ${STD_FLAGS}
${SETSERIAL} -b /dev/ttyS1 ${STD_FLAGS}
echo "done."
${SETSERIAL} -bg /dev/ttyS{0,1}
--
Rob
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serial port speed
Anyone knows the default serail port speed? It is 38,400bps? Which file responsible for this setting? I want to increase it to 115,200bps. Lawrence -- TO UNSUBSCRIBE FROM THIS MAILING LIST: e-mail the word "unsubscribe" to [EMAIL PROTECTED] . Trouble? e-mail to [EMAIL PROTECTED] .
