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StartFcn

Specify callback function to execute before device object runs

Description

    Note:   You cannot use the legacy interface on 64–bit MATLAB®. See Session-Based Interface to acquire and generate data.

A start event is generated immediately after the start function is issued. This event executes the callback function specified for StartFcn. When the callback function has finished executing, Running is automatically set to On and the device object and hardware device begin executing. Note that the device object is not started if an error occurs while executing the callback function.

Start event information is stored in the Type and Data fields of the EventLog property. The Type field value is Start. The Data field values are given below.

Data Field Value

Description

AbsTime

The absolute time (as a clock vector) the event occurred.

RelSample

The acquired (AI) or output (AO) sample number when the event occurred.

Characteristics

Usage

AI, AO, common to all channels

Access

Read/write

Data type

String

Read-only when running

No

Values

The default value is an empty string.

See Also

Functions

start

Properties

EventLog, Running

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