**ShowPlay Reference Manual, Chapter 4 (StimulusEvents): writeport**
===== Writeport -- Write to a communications port =====
**usage: writeport id flg start duration value portnum **

 The WRITEPORT stimulus event causes a value to be sent to an external data port at the time specified by the START argument.  The DURATION argument can be used to indicate a time delay until the next stimulus, but the DURATION has no meaning for the WRITEPORT operation itself.  If the output port is a digital port, the value written will remain active on that port until a new value is written.

The PORTNUM argument specifies which data port will be writtten.  CIGAL specifies external ports as:
  PORTNUM:
      -1  - digital port
     100  - printer port
       1  - COM1 serial port
       2  - COM2 serial port
       3  - COM3 serial port
        ...
 
===== =====
**See Also:**\\
[[jvs:cigal:showplay:manual:chapter1:ppf|Paradigm parameter file]], 
[[jvs:cigal:showplay:manual:chapter1:stimulustable|Stimulus table]]

[[jvs:cigal|CIGAL Home]], 
[[jvs:cigal:manual|CIGAL Manual]], 
[[jvs:cigal:showplay|ShowPlay Home]], 
[[jvs:cigal:showplay:manual|ShowPlay Manual]], 
[[jvs:cigal:showplay:manual:chapter4|Stimulus Event List]], 
[[jvs:cigal:showplay:manual:help|Manual Help]]