LinuxQuestions.org
Latest LQ Deal: Complete CCNA, CCNP & Red Hat Certification Training Bundle
Go Back   LinuxQuestions.org > Forums > Linux Forums > Linux - Software
User Name
Password
Linux - Software This forum is for Software issues.
Having a problem installing a new program? Want to know which application is best for the job? Post your question in this forum.

Notices


Reply
  Search this Thread
Old 03-15-2004, 08:48 PM   #1
vidyaraj
LQ Newbie
 
Registered: Mar 2003
Posts: 12

Rep: Reputation: 0
serial port testing


hi all
Currently we are using SUSE linux 8.1.

I have added my external Hardware through RS232 SERIAL PORT.
but if i type command like ps
ps -vax | grep ttyS0
some times i am getting this message, but some times i am not getting message like this in the console

1 1287 pts/2 R 0.00 136 96 1523 572 0.0 grep ttyS0
why i am not getting this message always. Is that means my serial port is configured properly

From linux planet i came to know like
" Another cause reported for the SuSE distribution is that there may be two serial drivers present instead
of one"

How can I know wheather two or one serial driver present.

One more thing they are suggesting like mouse can access the same port ie. what accessed by serial port.
How can i test these things.

Do u have any idea how to trouble shoot my serial port wheather it is properly configured or not

Expecting your kind reply

thanks
vidyaraj
 
Old 04-01-2004, 08:33 AM   #2
fluppi
Member
 
Registered: Oct 2003
Location: Switzerland (Europe)
Distribution: OpenSuSE, RedHat, Knoppix, IRIX + MacOSX
Posts: 198

Rep: Reputation: 31
Hi,
Take a look into /etc/inittab, is there anything active with ttyS ?

The serial port must not be allways on, usually just when you send or receive data.

Is there anythin listening to the port, like a terminal, driver or so ?
Does your PC even know that there is something outside ?
Are the parameters correct: Same speed, parity, hardware-flow-control and so on ?

At last what have you added at the seriel port ?

HTH
Fluppi
 
Old 04-01-2004, 07:54 PM   #3
vidyaraj
LQ Newbie
 
Registered: Mar 2003
Posts: 12

Original Poster
Rep: Reputation: 0
hi flippi

hi
thanks for your info I faced the problem because of speed mismatch between my machine and product manufacturing machine.
thanks for your needy help
cheers
vidyaraj
 
  


Reply


Thread Tools Search this Thread
Search this Thread:

Advanced Search

Posting Rules
You may not post new threads
You may not post replies
You may not post attachments
You may not edit your posts

BB code is On
Smilies are On
[IMG] code is Off
HTML code is Off



Similar Threads
Thread Thread Starter Forum Replies Last Post
linux serial port to router console port connection? frankie_fix Linux - General 3 02-26-2007 10:32 PM
Using serial port card(PCMCIA) with IPAQ running Linux, can't find ttyS0 port d2army Linux - Laptop and Netbook 0 11-12-2005 09:07 PM
Using an USB port as a standard DB9 Serial Port Lsteele Linux - Newbie 1 10-22-2005 10:48 AM
testing port blocking Moebius Linux - Networking 2 10-02-2005 02:24 PM
Serial port Greg21 Linux - Hardware 5 08-04-2003 08:31 PM


All times are GMT -5. The time now is 06:50 AM.

Main Menu
Advertisement
My LQ
Write for LQ
LinuxQuestions.org is looking for people interested in writing Editorials, Articles, Reviews, and more. If you'd like to contribute content, let us know.
Main Menu
Syndicate
RSS1  Latest Threads
RSS1  LQ News
Twitter: @linuxquestions
Facebook: linuxquestions Google+: linuxquestions
Open Source Consulting | Domain Registration