Reading data from a serial port Post: 302919913

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Operating Systems Linux Debian Reading data from a serial port Post 302919913 by Meow613 on Sunday 5th of October 2014 03:58:46 PM

10-05-2014

Registered User

Thank you Coorona688

Code:

root@meow:/home/ethan#  lsof /dev/ttyS0
COMMAND  PID USER   FD   TYPE DEVICE SIZE/OFF NODE NAME
screen  3871 root    6u   CHR   4,64      0t0 1119 /dev/ttyS0

---------- Post updated at 03:58 PM ---------- Previous update was at 03:29 PM ----------

Thanks Corona668

Here is some more info -

Code:

root@meow:/home/ethan# cat < /dev/ttyS0 > myfile
^Z
[1]+  Stopped                 cat < /dev/ttyS0 > myfile
root@meow:/home/ethan# locate myfile
/home/ethan/myfile
root@meow:/home/ethan# cat myfile
root@meow:/home/ethan# cat < /dev/ttyS0 > myfile
^Z
[2]+  Stopped                 cat < /dev/ttyS0 > myfile
root@meow:/home/ethan# chown ethan:ethan myfile
root@meow:/home/ethan# cat < /dev/ttyS0 > myfile
^C
root@meow:/home/ethan# cat myfile
root@meow:/home/ethan# ls -l myfile
-rw-r--r-- 1 ethan ethan 0 Oct  5 15:54 myfile
root@meow:/home/ethan# chmod 777 myfile
root@meow:/home/ethan# ls -l myfile
-rwxrwxrwx 1 ethan ethan 0 Oct  5 15:54 myfile
root@meow:/home/ethan# cat < /dev/ttyS0 > myfile
^Z
[3]+  Stopped                 cat < /dev/ttyS0 > myfile
root@meow:/home/ethan# cat myfile

TIA

Meow613

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LEARN ABOUT REDHAT

serial_cs

SERIAL_CS(4)						     Kernel Interfaces Manual						      SERIAL_CS(4)

NAME

       serial_cs - PCMCIA serial port driver

SYNOPSIS

       insmod serial_cs.o [pc_debug=n] [irq_list=i,j,...]  [do_sound=n]

DESCRIPTION

       Serial_cs  is  the Card Services driver for all PCMCIA serial devices, including modem cards.  When serial_cs is bound to a serial or modem
       card, it will generally attempt to allocate the first unused serial device for use by the card.	The device chosen will be recorded in  the
       kernel log file, and will also be reported to cardmgr(8).  The major and minor numbers and device name reported by serial_cs will match the
       corresponding "dialout" device (/dev/cua#).  The new device can be accessed using this device file or the corresponding /dev/ttyS#  device.
       The default serial card setup script will link the dialout device to /dev/modem.

PARAMETERS

       pc_debug=n
	      Selects  the PCMCIA debugging level.  This parameter is only available if the module is compiled with debugging enabled.	A non-zero
	      value enables debugging.

       irq_list=i,j,...
	      Specifies the set of interrupts that may be allocated by this driver.

       do_sound=n
	      A flag specifying if speaker output should be enabled.  The default is 1 (true).	Set to 0 to disable speaker output.

AUTHOR

       David Hinds - dahinds@users.sourceforge.net

SEE ALSO

       cardmgr(8), pcmcia(5).

pcmcia-cs							2000/06/12 21:24:48						      SERIAL_CS(4)