Справочник Пользователя для National Instruments Welding System 321645c-01
Chapter 2
Function Reference — DIG_Trigger_Config
NI-DAQ FRM for PC Compatibles
2-192
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National Instruments Corporation
DIG_Trigger_Config
Format
status = DIG_Trigger_Config (deviceNumber, group, startTrig, startPol, stopTrig,
stopPol, ptsAfterStopTrig, pattern, patternMask)
Purpose
Sets up trigger configuration for subsequent buffered digital operations with pattern
generation mode only (either internal or external requests).
generation mode only (either internal or external requests).
Parameters
Input
Parameter Discussion
startTrig specifies the source of the start trigger.
0:
Software start trigger.
1:
Hardware trigger.
2:
Digital pattern trigger (input group only).
startPol specifies the polarity of the start trigger.
0:
Active high.
1:
Active low.
2:
Pattern matched.
3:
Pattern not matched.
Name
Type
Description
deviceNumber
i16
assigned by configuration utility
group
i16
group
startTrig
i16
source of start trigger
startPol
i16
polarity of start trigger
stopTrig
i16
source of stop trigger
stopPol
i16
polarity of stop trigger
ptsAfterStopTrig
u32
number of points to acquire after the trigger
pattern
u32
data pattern on which to trigger
lineMask
u32
mask selecting bits to be compared for pattern
or change detection
or change detection