transferring \n from perl to linux via serial port

[nirmalguna]

Hi,

I am trying to control an OMAP with Linux, from a Windows laptop running Perl via serial port. I could open serial port (COM1) and send commands, but not able to execute them by sending the enter key. I tried \n but it only moving the cursor to the next line, and not imitating enter key. Code is below. Any suggestions? Please help!!

---------



open( PORT, "+>COM1") or die "Cant open COM1 - $!";

$msg="ls\n";



print PORT $msg;

---------

The output comes as
.#ls
|



but doesnt execute..

Thanks!

 

[KevinADC]

are you trying to run the 'ls' operating system command?

- Kevin, perl coder unexceptional!

 

[nirmalguna]

Hi Kevin,
Yes, I am trying to execute the OS command ls . Later on, I am planning to control the OMAP thru serial port via perl.. Thanks!

 

[PaulTEG]

you could try \r or \r\n as carriage returns ^M, or ^M^N respectively

Paul
------------------------------------
Spend an hour a week on CPAN, helps cure all known programming ailments ;-)

 

[nirmalguna]

Hi Paul,
I did try them. Also tried the binmode(). But it goes to thenext line, but doesnt come up with the prompt - meaning it dint execute the previous statement.

E.g.

.#ls -- followed by \r\n
.| -- consider | as cursor position

 

[KevinADC]

how is this:

open( PORT, "+>COM1") or die "Cant open COM1 - $!";

connecting with Linux?

- Kevin, perl coder unexceptional!

 

[nirmalguna]

No, that is connecting to the COM port. My OMAP board running linux is connected to the COM port and accepts commands..

 

[KevinADC]

ahh.... well, I don't know how to what you are trying to do. Maybe somone else will so check back.

- Kevin, perl coder unexceptional!

 

[PaulTEG]

From the top, please state your problem, and only the problem, then skip a line (or two), and declare what you've tried, and what your findings are ...

BTE an OMAP is a what?

Paul
------------------------------------
Spend an hour a week on CPAN, helps cure all known programming ailments ;-)

 

[nirmalguna]

Objective - I want to control linux via serial port.

Problem - I am able to send commands. But not able to send the Carriage return key to make linux execute.

Platform - Using Perl on MSDOS(WinXP) to control serial port.

Tries - Used \n, \r\n and also under bitmode() of perl.

Findings - The cursor on linux prompt moves to next line, but command prompt doesnt appear and the command is not executed either.

Thanks for your time Paul.

 

[nirmalguna]

And OMAP is a Texas Instruments processor I am using as platform for my chip characterization.

 

[PaulTEG]

These Guys might be the best to ask, the \r should work, but the dev network for OMAP chips would be best placed, could be that it's a proprietary OS

HTH

Paul
------------------------------------
Spend an hour a week on CPAN, helps cure all known programming ailments ;-)