Shell Programming and Scripting

Hi all:

i wanna automate a test written in Tcl, but stuck in serial communication.

I had 2 PC, one is my local Windows machine, the other one is my test Linux server. The Linux box is connected to the test board via serial port. So I wanna send commands and get output through the serial port.

So i wrote a Tcl script, and wanna call the scripts in Windows, remotely connect to the Linux server and talk to the test device via serial port. It failed so far. I used 'Open' in tcl to create a serial connection in Linux.

Code:

 ex. set fh [open /dev/ttyS0 RDWR] 

what I learn the reasons why this may not work are that (in my option):

first, fh is a file descriptor if one open a file (in linux, all devices represent a file), so u cant monitor a live test, instead read a file line by line after a numbers of seconds. I doubt there is no eof in /dev/ttyS0, which means even u can read from it, if no incoming output, u can still read an empty string without issuing an error.

second, since i remotely connect to linux box from window pc, tcl interpreter is confused by which serial port i was trying to open, (windows? or Linux? I am using a virtual Linux in Windows to call the script, connect to the Linux sever, trying to communicate the device connected to there.)

I hope everyone understand my situation, and my purposes now.

I really appreciate all your suggestion regarding how to remotely commnucate serial port in Tcl.

Unfortunately I don't know TCL well but I have other suggestions... First off make sure that the port is set to the correct baud rate and mode.

Code:

stty -F /dev/ttyS0 9600 CS8 -cstopb -parenb raw

should set it to 9600-baud, 8-bit, one stop bit, no parity, raw mode(i.e, ctrl-c doesn't send SIGINT!). This doesn't have to be run inside your program, and it ought to remember once run once unless something else changes it(or your system reboots).

Thanks!

I had done both stty configuration and double check with minicom -s

The settings is correct, but what I am interested in is which serial port is going to open, on windows or linux, as there is no specific option in Open command in tcl.
Thus, I doubt the Tcl Open my windows serial port (since i had virtual linux, all ttys are mounted to com) rather than the one in my Linux server.

I think Windows still has special names for devices lurking around in a DOS-like manner. You might, just might, be able to get away with opening COM9 or something.

No solution to offer, but if anybody wants to read about Tcl :
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