Mail Archives: cygwin/2004/04/21/11:57:18
> -----Original Message-----
> From: cygwin-owner On Behalf Of bertrand marquis
> Sent: 21 April 2004 16:41
> i need to use stty to send commands through the serial port
> under cygwin:
That's not what stty is for.
> stty
> 1:0:cbd:0:3:1c:7f:15:4:5:1:0:11:13:1a:0:12:f:17:16:0:0:0:0:0:0
> :0:0:0:0:0:0:0:0:0:0
> < /dev/ttyS0
>
> but stty answer me that 1:...:0 is a wrong argument ?
> I'm using the last version of cygwin and the serial port is working
>
> anyone has an idea ?
#1: You've completely misunderstood stty. It allows you to set parameters
such as baud rate, flow control, char translation, etc. for a serial port.
It's not for sending data in or out of it.
#2: That string of colon-separated hex numbers doesn't mean anything to
stty. None of the arguments it understands come in that form.
#3: If you're trying to send something out the serial port, you should be
using "> /dev/ttyS0", not "< /dev/ttyS0". You're telling stty to take any
standard input it requires from the serial port. That's not going to work.
#4: Haven't you ever heard of the "--help" option, or the "man" or "info"
utilities? Repeat after me:
stty --help
man stty
info stty
over and over again until you've got it memorized!
#5: At a guess, you want to turn those hex numbers into actual bytes sent
out the serial port. Why do you have 'cbd' as one of them? That's too
large for a byte-sized value.
#6: To send data out the serial port, use echo or cat (depending where the
data is), and redirect it to the serial port with >/dev/ttyS0.
#7: I dunno how you'd get hex numbers converted into actual bytes at the
command line. You need a command that does the opposite of "od". Assuming
there was such a thing, you could then write
echo
1:0:cbd:0:3:1c:7f:15:4:5:1:0:11:13:1a:0:12:f:17:16:0:0:0:0:0:0:0:0:0:0:0:0:0
:0:0:0 | [opposite-of-od] | cat > /dev/ttyS0
(that's all one line; sorry about any wrapping).
cheers,
DaveK
--
Can't think of a witty .sigline today....
--
Unsubscribe info: http://cygwin.com/ml/#unsubscribe-simple
Problem reports: http://cygwin.com/problems.html
Documentation: http://cygwin.com/docs.html
FAQ: http://cygwin.com/faq/
- Raw text -