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DAQmx_ReadCounterArray

Reads multiple samples from a specified counter task.

Syntax

void avl::DAQmx_ReadCounterArray
(
	DAQmx_ReadCounterArrayState& ioState,
	atl::Optional<const atl::String&> inDeviceID,
	avl::DAQmxTaskID inTaskID,
	int inSamples,
	atl::Optional<int> inTimeout,
	atl::Array<float>& outValues,
	atl::Conditional<avl::DAQmxTaskID>& outTaskID
)

Parameters

Name	Type	Range	Default	Description
ioState	DAQmx_ReadCounterArrayState&			Object used to maintain state of the function.
inDeviceID	Optional<const String&>		NIL	Device alias, product name or a serial number
inTaskID	DAQmxTaskID			ID of task to read samples from
inSamples	int	1 -		Number of samples to read
inTimeout	Optional<int>		NIL	Time (in milliseconds) to wait for the function to read samples
outValues	Array<float>&			Array of read values
outTaskID	Conditional<DAQmxTaskID>&			ID of a created task

Remarks

Device driver software

This filter is intended to cooperate with digital I/O cards using its vendor driver software. To be able to connect to a card it is required to install NI-DAQmx driver software. Currently Adaptive Vision Studio requires NI-DAQmx version 9.5.

NI-DAQmx driver software can be downloaded from the following website: http://www.ni.com/dataacquisition/nidaqmx.htm.

Device identification

When there is only one device connected to computer, inDeviceID field can be set to Auto. In this situation first available device will be found and connected.

inDeviceID can be used to pick one of multiple devices connected to computer. Set this field to Device alias (for example "Dev1"), product name or serial number. This parameters should be available in Measurement & Automation Explorer.

Multithreaded environment

This function is not guaranteed to be thread-safe. When used in multithreaded environment, it has to be manually synchronized.