**ShowPlay Reference Manual, Chapter 3 (ControlVariables): trigtype**
===== Trigtype -- Specify external trigger type =====
The TRIGTYPE variable is used to specify which external signal will trigger the start of a paradigm. 

Values for TRIGTYPE are:
  1 - digital input; uses DSTARTMASK to specify which bit(s) would trigger
  2 - keyboard (or mouse) input; uses DSTARTMASK to specify which key would trigger
  3 - analog input; uses ATRIG_CHAN to specify the analog port, and ATRIG_VAL to specify the signal threshold for triggering
  4 - port (any input); uses ATRIG_CHAN to specify the port
  5 - port (specific bits); uses ATRIG_CHAN to specify the port, and DSTARTMASK to specify which bit(s) would trigger

TRIGTYPE is used in conjunction with [[jvs:cigal:showplay:manual:chapter3:trigtype|TRIG_FLAG]], which indicates when to look for external trigger signals. 
**See Also:**\\
[[jvs:cigal:showplay:manual:chapter3:trig_flag|Trig_flag]],
[[jvs:cigal:showplay:manual:chapter3:atrig_chan|Atrig_chan]],
[[jvs:cigal:showplay:manual:chapter3:atrig_val|Atrig_val]],
[[jvs:cigal:showplay:manual:chapter3:dstartmask|Dstartmask]])\\
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[[jvs:cigal:manual|CIGAL Manual]], 
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[[jvs:cigal:showplay:manual|ShowPlay Manual]], 
[[jvs:cigal:showplay:manual:chapter3|InputParameters List]], 
[[jvs:cigal:showplay:manual:help|Manual Help]]