viMoveOut8, viMoveOut16, viMoveOut32, and viMoveOut64

This section contains information specific to the Windows product.

Syntax

viMoveOut8(ViSession vi, ViUInt16 space, ViBusAddress offset, ViBusSize length, ViAUInt8 buf8);

viMoveOut16(ViSession vi, ViUInt16 space, ViBusAddress offset, ViBusSize length, ViAUInt16 buf16);

viMoveOut32(ViSession vi, ViUInt16 space, ViBusAddress offset, ViBusSize length, ViAUInt32 buf32);

viMoveOut64(ViSession vi, ViUInt16 space, ViBusAddress offset, ViBusSize length, ViAUInt64 buf64); [VISA 4.0 and later]

Description

This function moves an 8-bit, 16-bit, 32-bit, or 64-bit block of data from local memory to the specified memory space (assigned memory base + offset). This function writes the 8-bit, 16-bit, 32-bit, or 64-bit value to the address space pointed to by space. The offset must be a valid memory address in the space. This function does not require viMapAddress to be called prior to its invocation.

If the ViSession parameter (vi) refers to an INSTR session, the offset parameters specify relative offsets from the start of the instrument’s address space. If the ViSession parameter (vi) refers to a MEMACC session, the offset parameters are absolute offsets from the start of memory in the specified VXI address space.

Valid entries for specifying address space:

Value	Description
VI_A16_SPACE	Address A16 memory address space of the VXI/MXI bus.
VI_A24_SPACE	Address A24 memory address space of the VXI/MXI bus.
VI_A32_SPACE	Address A32 memory address space of the VXI/MXI bus.
VI_A64_SPACE	Address the A64 address space of VXI/MXI bus.
VI_PXI_CFG_SPACE	Address the PCI configuration space.
VI_PXI_BAR0_SPACE – VI_PXI_BAR5_SPACE	Address the specified PCI memory or I/O space.
VI_PXI_ALLOC_SPACE	Access physical locally allocated memory.

The viMoveOut functions do a block move of memory from a VXI device if VI_ATTR_DEST_INCREMENT is 1. However, they do a FIFO read of a VXI memory location if VI_ATTR_DEST_INCREMENT is 0 (zero).

For an INSTR resource, the offset is a relative address of the device associated with the given INSTR resource. For a MEMACC resource, the offset parameter specifies an absolute address.

All operations on a PXI MEMACC resource that accept a space parameter to indicate the address space for bus access SHALL accept the following value for the space parameter: VI_PXI_ALLOC_SPACE.

The offset specified in the viMoveOut8, viMoveOut16, viMoveOut32, and viMoveOut64 operations for an INSTR resource is the offset address relative to the device's allocated address base for the corresponding address space specified.

For example, if space specifies VI_A16_SPACE, offset specifies the offset from the logical address base address of the VXI device specified. If space specifies VI_A24_SPACE, VI_A32_SPACE, or VI_A64_SPACE offset specifies the offset from the base address of the VXI device's memory space allocated by the VXI Resource Manager within VXI A24, A32, or A64 space.

The length specified in the viMoveOutXX operations is the number of elements (of the size corresponding to the operation) to transfer, beginning at the specified offset. Therefore, offset + length*size cannot exceed the amount of memory exported by the device in the given space.

The length specified in the viMoveOutXX operations is the number of elements (of the size corresponding to the operation) to transfer, beginning at the specified offset. Therefore, offset + length*size cannot exceed the total amount of memory available in the given space.

Parameters

Name	Dir	Type	Description
vi	IN	ViSession	Unique logical identifier to a session.
space	IN	ViUInt16	Specifies the address space. (See the following table.)
offset64	IN	ViBusAddress64	Offset (in bytes) of the starting address or register to write to.
length	IN	ViBusSize	Number of elements to transfer, where the data width of the elements to transfer is 8 bits for viMoveOut8, 16 bits for viMoveOut16, 32 bits for viMoveOut32 or 64 bits for viMoveOut64.
buf8, buf16, buf32, or buf64	IN	ViAUInt8, ViAUInt16, ViAUInt32, ViAUInt64	Data written to bus (8 bits for viMoveOut8, 16 bits for viMoveOut16, 32 bits for viMoveOut32, and 64 bits for viMoveOut64).

Return Values