LabLISP Guide

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**//POLA-ANA-MOTORS//**

Package ''PAM'' contains 2 symbols ''POLA'' and ''ANA''. The symbols evaluate to NIL, but internally represent control axes of the device.

They are used in following function:

''MOVE''

Command to move polarizer or analyzer. Needs 2 arguments, first is the symbol POLA or ANA. Second argument is the azimuth in degrees. Returns T if command is accepted.

In the present implementation, only one motor can move at given moment. Returns NIL if the command is rejected.

<code lisp>
>(pam::move 'pam::pola 60)
T

>(pam::move 'pam::ana 18)   ; sending command immediately
;Device PAM is moving at the moment!
NIL         
</code>

''MOVING?''

Simple predicate indicating if any of the motors are moving. No arguments. Used together with WAIT special operator.

<code lisp>
>(pam::moving?)
NIL

>(pam::move 'pam::ana 18)
T

>(pam::moving?)  ; while the analyzer is moving
T

>(wait (pam::moving?))    ; use LabLISP special operator WAIT, will block 
NIL                       ; returns NIL once the measurement is done
</code>