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Chapter 2

Function Reference — Configure_HW_Analog_Trigger

©

 National Instruments Corporation

2-83

NI-DAQ FRM for PC Compatibles

Configures the hardware analog trigger. The hardware analog triggering circuitry produces a 
digital trigger that you can use for any of the signals available through the 

Select_Signal

 

function by selecting source = 

ND_PFI_0

).

Legal ranges for the onOrOff, mode, and trigSource parameters are given in terms of 
constants that are defined in a header file. The header file you should use depends on which 
of the following languages you are using:

•

C programmers—

NIDAQCNS.H

 (

DATAACQ.H

 for LabWindows/CVI)

•

BASIC programmers—

NIDAQCNS.INC

 (Visual Basic for Windows programmers should 

refer to the Programming Language Considerations section in Chapter 1, Using the 
NI-DAQ Functions, for more information.)

•

Pascal programmers—

NIDAQCNS.PAS

onOrOff informs NI-DAQ whether you want to turn the analog trigger on or off. Legal values 
for this parameter are 

ND_ON

 and 

ND_OFF

. 

i16

assigned by configuration utility

u32

turns the analog trigger on or off

i32

specifies the low level used for analog triggering

i32

specifies the high level used for analog triggering

u32

the way the triggers are generated

u32

the source of the signal used for triggering