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Operating Systems Linux Urgent - serial port
# 1  
Old 08-04-2008
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 I/O 0x3f8 (irq=4)is a 16550A
serial 8250:ttyS1 at I/O 0x2f8 (irq=3)is a 16550A
serial 8250:ttyS2 at I/O 0x3e8 (irq=4)is a 16550A
serial 8250:ttyS3 at I/O 0x2e8 (irq=3)is a 16550A
0:05:ttyS0 at I/O 0x3f8 (irq=4) is a 16550A
0:06:ttyS1 at I/O 0x2f8 (irq=3) is a 16550A
0:09:ttyS3 at I/O 0x2e8 (irq=11) is a 16550A

I also tried setserial -g /dev/ttyS2 but getting the same result

My Qustion is:
1) what is the difference b/w first 4 lines and last three lines and Y is port 3(ttyS2) not getting displayed in b/w last three lines.
2) Is there something I have to do to enable port 3.
2)Please help me out to get the port 3 into working condition


Thanks in advance
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LEARN ABOUT DEBIAN

cyclades-devices

cyclades-devices(5)													       cyclades-devices(5)

NAME

       cyclades-devices - tables for driving cyclades-serial-client

DESCRIPTION

       The  cyclades-devices  file  supplies all mapping between Unix device files (/dev/*) and the addresses of serial ports of Cyclades Terminal
       Servers. It contains one entry for each serial port, with the following format:

       device:rastype:rasname:physport:type:options

       Note: A # character at beginning of line indicates a comment

       The entry fields are:

       devname
	      - A full pathname of the file that will be associated to the serial port. It must start with  a "/dev/" preffix.	Two naming schemes
	      may  be  used here: - devname does not exist, and will be linked to a free pseudo-tty. This is the default behavior of cyclades-ser-
	      cli.  - devname is the name of a valid slave pseudo-tty.	In this case, the '-t 1' option must be assigned in options field.  (Note:
	      this option is not supported by this release).

       rastype
	      - Terminal Server type: - prts, for Cyclades Pr302X/TS Terminal Servers.	- path, for Cyclades PathRAS Terminal Server.

       rasname
	      - Host Name or IP Address of the Terminal Server where the serial port resides.

       physport
	      -  Number  of physical port in the Terminal Server. If treated as the IP address associated with this port, in a IP-based addressing
	      scheme.

       type   - Server type that will be contacted to handle the serial port: - rtelnet, for Remote Telnet Server - socket, for Socket Server

       options
	      - Per-port specific options, passed to cyclades-ser-cli program.

EXAMPLES

       1. Device on a PR3020/TS Terminal Server pr3k Port 1, accessed through /dev/ctty01 device file name, using telnet protocol  (remote  telnet
       server)

       /dev/ctty01:prts:pr3k:1:rtelnet:

       2. The same device, but with an IP address pr3k_port1 associated to the serial port (IP-based port addressing)

       /dev/ctty01:prts:pr3k_port1:0:rtelnet:

       3. Device on a PathRAS Terminal Server pr3k Port 2, accessed through /dev/ctty02 device file name, using socket protocol (socket server)

       /dev/ctty02:path:pr3k:2:socket:

FILES

       /etc/cyclades-devices	This file

SEE ALSO

       cyclades-serial-client(1), cyclades-ser-cli(1)

															       cyclades-devices(5)