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       gpiv_trig - triggers a (double Nd_YAGG) laser with a CCD camera.


       gpiv_trig  [-h  |  --help]  [-i | --interactive] [-v | --version] [-V |


       gpiv_trig triggers a CCD  camera  and  a  (double  Nd_YAGG)  laser  for
       Particle  Image  velocimetry  (PIV).  The  code  uses  a  kernel module
       gpivtrig_rtl from the gpivtrig package that depends on  the  Real  Time
       Application Interface (RTAI) and RealtimeLinux. Trigger pulses are send
       to the parallel port  of  the  PC  (/dev/lpt0  or  /dev/lpt1;  see  the
       configure  script  of the gpivtrig package) at bins #1 (camera), #2 and
       #3 (first and second laser respectively). The program  may  be  started
       directly if all modules have been loaded or by the gpiv_control script,
       also included in the gpivtrig package,  which takes care of the loading
       and  unloading  of  the  needed kernel modules. Currently, gpiv_trig is
       tested with RTAI-3.1 and the linux kernel-2.4.27.

       This program uses the TRIG parameters. The  command  line  options  are
       explained below.


       -h | --help
              On-line help.

       -i | --interactive
              Prompt for confirmation.

       -v | --version
              Print   version   information  on  standard  output,  then  exit

       -V | --verbose
              program behaves more verbose during operation  showing  what  is
              going on


       gpivtools(1), gpiv_control(1), gpiv(1)


       Gerber Van der Graaf

                                19 Januari 2005