VI_ATTR_DMA_ALLOW_EN

NI-VISA 15.0 Help

Edition Date: June 2015

Part Number: 370131S-01

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Resource Classes

GPIB INSTR, GPIB INTFC, PXI INSTR, Serial INSTR, TCPIP INSTR, VXI INSTR, VXI MEMACC, VXI SERVANT

Attribute Information

Access Privilege Data Type Range Default

Read/Write
Local

ViBoolean

VI_TRUE(1)
VI_FALSE(0)

N/A

Description

This attribute specifies whether I/O accesses should use DMA (VI_TRUE) or Programmed I/O (VI_FALSE). In some implementations, this attribute may have global effects even though it is documented to be a local attribute. Since this affects performance and not functionality, that behavior is acceptable.


Related Topics

INSTR Resource

INTFC Resource

MEMACC Resource

SERVANT Resource

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