David Relson wrote:
On Fri, 25 Dec 2009 14:10:46 -0600
Dale wrote:
David Relson wrote:
My mobo has two serial ports.
As reported by hwinfo they are:
Serial Port 0: 0x3f8
Serial Port 1: 0x2f8
After booting the machine, dmesg indicates that tty0 is the console
with message:
console [tty0] enabled
/dev names a multitude of tty devices,
i.e. /dev/tty0, /dev/tty1, ...
How do I determine which devices correspond to the serial ports?
Thanks.
David
Mine is /dev/ttyS0 and /dev/ttyS1 . I put both devices so you will
notice what is alpha and what is numeric. Also note the S is capitol
as well.
Dale
:-) :-)
My /dev/tty* didn't include any /dev/ttyS* entries. Searching the web,
I learned that "MAKEDEV /dev/ttyS0" and "MAKEDEV /dev/ttyS1" will
create the missing entries and that "stty -F /dev/ttyS0 -a" will
provide configuration information for the port.
My little Serial.cpp class is now successfully writing to the port (as
proved by my son running Hyperterminal and receiving the sent
characters). However, receiving characters isn't yet working.
Neither his hyperterminal nor my sender (with a loopback plug) is
receiving.
Are you sure you enabled this in the kernel? It is under Device
Drivers > Character devices > Serial Drivers then enable these:
<*> 8250/16550 and compatible serial support
(4) Maximum number of 8250/16550 serial ports
(4) Number of 8250/16550 serial ports to register at runtime
At least that works for my dial-up modem and my UPS.
You may be able to put two instead of four but as I said, it works here
like this. I only have two ports tho.
Dale
:-) :-)
