NI DAQMX Internal Buffer Configuration

Internal Buffer Configuration

• DAQmxCfgInputBuffer
• DAQmxCfgOutputBuffer

DAQmxCfgInputBuffer

int32 DAQmxCfgInputBuffer (TaskHandle taskHandle, uInt32 numSampsPerChan);

Purpose

Overrides the automatic input buffer allocation that NI-DAQmx performs.

Parameters

Input
Name	Type	Description
taskHandle	TaskHandle	The task used in this function.
numSampsPerChan	uInt32	The number of samples the buffer can hold for each channel in the task. Zero indicates no buffer should be allocated. Use a buffer size of 0 to perform a hardware-timed operation without using a buffer.

Return Value

Name	Type	Description
status	int32	The error code returned by the function in the event of an error or warning. A value of 0 indicates success. A positive value indicates a warning. A negative value indicates an error.

DAQmxCfgOutputBuffer

int32 DAQmxCfgOutputBuffer (TaskHandle taskHandle, uInt32 numSampsPerChan);

Purpose

Overrides the automatic output buffer allocation that NI-DAQmx performs.

Parameters

Input
Name	Type	Description
taskHandle	TaskHandle	The task used in this function.
numSampsPerChan	uInt32	The number of samples the buffer can hold for each channel in the task. Zero indicates no buffer should be allocated. Use a buffer size of 0 to perform a hardware-timed operation without using a buffer.

Return Value

Name	Type	Description
status	int32	The error code returned by the function in the event of an error or warning. A value of 0 indicates success. A positive value indicates a warning. A negative value indicates an error.