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xmode2(1)


NAME

   xmode2 - Show the pulse/space length of infrared signals

SYNOPSIS

   xmode2 [options]

DESCRIPTION

   The main purpose of xmode2 is to check operation of your home-brew LIRC
   receiver hardware and to see the IR waveform of the  remote  controller
   without an expensive oscilloscope. Very useful for debugging. Of course
   this program won't work with hardware that decodes the  signals  itself
   like   e.g.   TV  cards  or  the  Irman  i.  e.,  it  only  works  with
   LIRC_MODE_MODE2 type drivers.

   xmode2 prints a simple graphics display of the pulse/space lengths.  It
   accepts  a  few commands including time base changes; see the xmode2 -h
   output.

   lirc-lsplugins(1) allows checking if a driver is a LIRC_MODE2 type one.

OPTIONS

   -h --help
          display usage summary

   -v --version
          display version

   -d --device=device
          read from given device

   -H --driver=driver
          use given driver

   -m --mode
          enable alternative display mode

   -r --raw
          access device directly

RUNNING AS ROOT

   In many cases xmode2 needs  to  run  as  root  to  access  devices  not
   available  to regular users. On the other hand, running as root creates
   problems such as log files owned by root, security concerns etc.

   In order to cope with this, xmode2 by  default  drops  root  privileges
   after  opening  the  input  device.  This support is based on that root
   permissions are acquired using sudo(1) e. g., using

           $ sudo xmode2 --driver default --device /dev/lirc0

   If not using sudo, the same behaviour could be accomplished  using  the
   SUDO_USER environment variable e. g.,

           # SUDO_USER=$LOGNAME xmode2 --raw /dev/lirc0

   The  --keep-root  option will make xmode2 keep it's root privileges for
   the complete run.

DRIVER LOADING

   Drivers are loaded dynamically.  The  search  path  used  for  this  is
   determined by (falling priority):

   - The --plugindir option.

   - The    'plugindir'   entry   in    the   [lircd]   section   of   the
     lirc_options.conf file.

   - The environment variable LIRC_PLUGINDIR.

   - A hardcoded default (usually /usr/lib[64]/lirc/plugins).

FILES

   ~/.cache/xmode2.log
       Debug  output.  Setting  the  XDG_CACHE_HOME  environment  variable
       relocates this file to $XDG_CACHE_HOME/mode2.log

SEE ALSO

   mode2(1)
   lirc-lsplugins(1)

   The  documentation  for  lirc  is  maintained  as  html pages. They are
   located under html/ in the documentation directory.



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