NAME

       halmeter - observe HAL pins, signals, and parameters

SYNOPSIS

       halmeter [-s] [pin|sig|param name] [-g X-position Y-position [Width]]

DESCRIPTION

       halmeter is used to observe HAL (Hardware Abstraction Layer) pins, signals, or parameters.
       It serves the same purpose as a multimeter does when working on physical systems.

OPTIONS

       pin name
              Display the HAL pin name.

       sig name
              Display the HAL signal name.

       param name
              Display the HAL parameter name.

       If neither pin, sig, or param are specified, the window starts out blank and the user must
       select an item to observe.

       -s     Small  window.  Non-interactive, must be used with pin, sig, or param to select the
              item to display.  The item name is displayed  in  the  title  bar  instead  of  the
              window,  and there are no "Select" or "Exit" buttons.  Handy when you want a lot of
              meters in a small space.

       -g     Geometry position.  Allows  one  to  specify  the  initial  starting  position  and
              optionally  the  width  of  the  meter. Referenced from top left of screen in pixel
              units.  Handy when you want to load a lot of meters  in  a  script  with  out  them
              displaying on top of each other.

USAGE

       Unless  \-s  is  specified,  there are two buttons, "Select" and "Exit".  "Select" opens a
       dialog box to select the item (pin, signal, or parameter) to  be  observed.   "Exit"  does
       what you expect.

       The  selection  dialog  has "OK", "Apply", and "Cancel" buttons.  OK displays the selected
       item and closes the dialog.  "Apply" displays the selected item but  keeps  the  selection
       dialog open.  "Cancel" closes the dialog without changing the displayed item.

EXAMPLES

       halmeter
              Opens a meter window, with nothing initially displayed.  Use the "Select" button to
              choose an item to observe.  Does not return until the window is closed.

       halmeter &
              Open a meter window, with nothing initially displayed.  Use the "Select" button  to
              choose an item.  Runs in the background leaving the shell free for other commands.

       halmeter pin parport.0.pin-03-out &
              Open  a  meter  window,  initially  displaying  HAL  pin parport.0.pin-03-out.  The
              "Select" button can be used to display other items.  Runs in background.

       halmeter -s pin parport.0.pin-03-out &
              Open a small meter window, displaying HAL pin parport.0.pin-03-out.  The  displayed
              item cannot be changed.  Runs in background.

       halmeter -s pin parport.0.pin-03-out -g 100 500 &
              Open  a small meter window, displaying HAL pin parport.0.pin-03-out.  places it 100
              pixels to the left and 500 pixels down from top  of  screen.   The  displayed  item
              cannot be changed.  Runs in background.

       halmeter -s pin parport.0.pin-03-out -g 100 500 400 &
              Open  a small meter window, displaying HAL pin parport.0.pin-03-out.  places it 100
              pixels to the left and 500 pixels down from top of screen.  The width will  be  400
              pixels (270 is default) The displayed item cannot be changed.  Runs in background.

AUTHOR

       Original  version  by  John  Kasunich,  as  part of the LinuxCNC project.  Improvements by
       several other members of the LinuxCNC development team.

REPORTING BUGS

       Report bugs to jmkasunich AT users DOT sourceforge DOT net

COPYRIGHT

       Copyright © 2003 John Kasunich.
       This is free software; see the source for copying conditions.  There is NO  warranty;  not
       even for MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.