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addtrigger

Add trigger connection to device interface

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Syntax

addtrigger(d,"Digital","StartTrigger",trigSrc,trigDest)
trg = addtrigger(___)
[trg,idx] = addtrigger(___)

Description

example

addtrigger(d,"Digital","StartTrigger",trigSrc,trigDest)adds a trigger connection to the DataAcquisition interface. The created connection is appended to theDigitalTriggersproperty of the DataAcquisition object.

trg= addtrigger(___)adds the trigger and returns the trigger object.

[trg,idx] = addtrigger(___)adds the trigger and returns the trigger object and the trigger index from the DataAcquisition interface.

Examples

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Add triggers to a DataAcquisition interface in various configurations.

Add a trigger shared between two devices.

d = daq("ni"); addinput(d,"Dev1","ai0","Voltage") addinput(d,"Dev2","ai0","Voltage") addtrigger(d,"Digital","StartTrigger","Dev1/PFI0","Dev2/PFI0")

Add a trigger imported from an external source.

d = daq("ni"); addinput(d,"Dev1","ai0","Voltage") addtrigger(d,"Digital","StartTrigger","External","Dev1/PFI0")

Add a trigger exported to an external destination.

d = daq("ni") addinput(d,"Dev1","ai0","Voltage") addtrigger(d,"Digital","StartTrigger","Dev1/PFI0","External")

Add a trigger from an external source supplied at terminalPXI_Trig0.

d = daq("ni"); addinput(d,"PXI1Slot5",0,"Voltage") addtrigger(d,"Digital","StartTrigger","External","PXI1Slot5/PXI_Trig0")

Add a trigger from an external source supplied at terminalPXI1Slot5/PXI_Star.

d = daq("ni"); addinput(d,"PXI1Slot5",0,"Voltage") addtrigger(d,"Digital","StartTrigger","External","PXI1Slot5/PXI_Star")

Input Arguments

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DataAcquisition接口, specified as aDataAcquisitionobject, created using thedaqfunction.

Example:d = daq()

Trigger signal source, specified as a string or character vector indicating a device terminal, or"external"when importing a terminal from an external source.

Example:"external"

Data Types:char|string

Trigger signal destination, specified as a string or character vector indicating a device terminal, or"external"when exporting a trigger to an external destination.

Example:"external"

Data Types:char|string

Output Arguments

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Trigger connection, returned as a trigger object, whose type and properties depend on the kind of trigger. For example:

DigitalTrigger with properties: Source: 'External' Destination: 'Dev4/PFI1' Type: StartTrigger Condition: 'RisingEdge'

Trigger index, returned as a numeric value. With this index, you can access the array of the DataAcquisitionDigitalTriggersproperty.

Version History

Introduced in R2020a

See Also

Functions

Topics