urgent......Serial port

Thread Tools Search this Thread
Operating Systems Linux urgent......Serial port
# 1  
Old 11-02-2007
urgent......Serial port

I think my serial port(on board) is not working ......
because when I am running same code on two machines its working good....but when my system comes into picture ....it doesnt show any output comming from serial port..........

can anybody tell me how to configure my serial port.........or to check it is installed on ot or not...........

moreover I had inserted another card having two serial ports.....
info about card:::::::::::::::::::is here
05:04.0 Serial controller: Timedia Technology Co Ltd PCI2S550 (Dual 16550 UART) (rev 01) (prog-if 02 [16550])
Subsystem: Timedia Technology Co Ltd Unknown device 4037
Flags: stepping, medium devsel, IRQ 10
I/O ports at 1100 [size=32]

but how to configure/install ....this card.
I am using fedora core 6
thanks & regards.........
# 2  
Old 11-02-2007
1. If the operating system says the device exists, eg
ls >/dev/ttyS0

if that does not return an error, the serial port is configured for the OS.

2. The next part is RS232 debugging, here always start with a known working terminal and go through the different combinations with a null-modem and even a break-out-box.
# 3  
Old 11-02-2007
but whem I am running command ::::
dmesg | grep tty
It shows:::::::
[root@arun ~]# dmesg | grep tty
Xen virtual console successfully installed as ttyS0
what does it means...my onboard serial is configured or not?????
and if configured then why I am not able to send or recieve data....
# 4  
Old 11-02-2007
also when I am using command::

[root@arun ~]# setserial -g /dev/ttyS0
Cannot get serial info: Invalid argument

why so??????????
i thing so that its not configured correctly............
# 5  
Old 11-02-2007
Originally Posted by arunchaudhary19
Xen virtual console successfully installed as ttyS0
Are you running as a virtual host, not a real machine?
# 6  
Old 11-02-2007
Can I modift it or not??????
So how to make it real console????????
please help........
# 7  
Old 11-02-2007
You don't want it as a real console, you want it connected to a serial port.

So the reasons things don't work when "when my system comes into picture" is because you don't have a real machine, everything is virtually provided by Xen. This may make writing software easier but it makes tracking comms problems down much harder because you now have to try and get the Xen environment to provide you with the real serial port.
Login or Register to Ask a Question

Previous Thread | Next Thread

10 More Discussions You Might Find Interesting

1. Solaris

Cabling and adapters to communicate to service processor serial port from Windows PC with USB port.

Hello, I have an unloaded T5140 machine and want to access the ILOM for the first time and subsequently the network port after that., and then load Solaris 10 the final January 2011 build. The first part is what confuses me -the cabling. I am coming from a Windows machine (w/appropriate... (5 Replies)
Discussion started by: joboy
5 Replies

2. Web Development

Writing to a Serial Port

I am trying to write to a serial port and capture the reponse in a file - adduser ethan dialout The user `ethan' is already a member of `dialout' root@meow:/home/ethan# ls -l /dev/ttyS0 crw-rw-r-- 1 ethan dialout 4, 64 Oct 7 20:55 /dev/ttyS0 $fh1 = fopen("/dev/ttyS0", "w+");... (74 Replies)
Discussion started by: Meow613
74 Replies

3. Solaris

How to enable Serial port on ILOM, when Network Port is enabled in parallel

Hi Everyone, In my environment, I have few T5220. On the iLOM Management Card, I have both Network and Serial port are cabled, I don't have any issues while I try to connect using Network Management port, but when I try to connect the serial port for the same server which is actually connected... (3 Replies)
Discussion started by: bobby320
3 Replies

4. Shell Programming and Scripting

Need help with serial port

Hi, I have a external board connected to my serial port. I need to execute "shutdown -r now" command when system boot up. When system boots up it requires a username ans password. Then I need to run my command. I can use rc script but that is rebooting system before it asks for username and... (0 Replies)
Discussion started by: charlie.arya
0 Replies

5. UNIX for Dummies Questions & Answers

Missing serial port

A neighbour's Ubuntu 10.04 machine has five serial ports, one on the motherboard and four on a PCI card. However, only four cards are showing: # dmesg | grep tty console enabled serial8250: ttyS0 at I/O 0x3f8 (irq = 4) is a 16550A 00:08: ttyS0 at I/O 0x3f8 (irq = 4) is a 16550A ... (2 Replies)
Discussion started by: dotancohen
2 Replies

6. Programming

Programming serial port

Hello! Can someone advice me which method I will use if I want to communicate with device via RS232 serial port with this requirements: 1. Serial port is opened in non-canonical mode. 2. All the time I need to check is there something to read. 3. If I have to write something I need to write it... (6 Replies)
Discussion started by: jvrlic
6 Replies

7. Solaris

Serial port not found

Hi, I am working with solaris 9,SUN-Blade-100 and I want to communicate with the Serial port.To check whether the port is working or not.I write code and when I execute the file,then I got the output-- According to this,serial port is not found.can anyone please tell me how to configure the... (1 Reply)
Discussion started by: smartgupta
1 Replies

8. Programming

Serial port programming

I am developing an application in c with Linux OS, where a radio modem working at baud rate 9600 will be attached to PC on serial port. More than four such units will be communicating at one time, so there may be jamming or data corruption. Each module will be transmitting Data packets less than... (2 Replies)
Discussion started by: raj8109
2 Replies

9. Linux

Urgent - serial port

Hi All, I am a begineer in Linux, I have 4 ports and 3 are operational port 1,port 2 and port 4 (when I plug in serial device I can see it working) but port 3 seems it is not working. I am sure the hardware is fine. when I give command dmesg | grep tty I get, serial 8250:ttyS0 at... (0 Replies)
Discussion started by: vr_82
0 Replies

10. UNIX for Dummies Questions & Answers

Serial port communication

We're running SCO Unix Openserver 5.05 and I'm having trouble with serial communication between the com2 serial port and a handheld device. Downloading data from Unix to the handheld works perfectly, but the other way around creates a major problem. I don't know whether it's a buffer overflow or... (1 Reply)
Discussion started by: Aretha
1 Replies
Login or Register to Ask a Question