VI_ATTR_DMA_ALLOW_EN
Resource Classes
GPIB INSTR, GPIB INTFC, GPIB-VXI INSTR, GPIB-VXI MEMACC, PXI INSTR, Serial INSTR, TCPIP INSTR, VXI INSTR, VXI MEMACC, VXI SERVANT
Attribute Information
| Access Privilege | Data Type | Range | Default |
|---|---|---|---|
|
Read/Write |
ViBoolean |
VI_TRUE(1) |
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