(To be removed) Unmap memory for low-level memory read and write operations
visa object function will be removed in a future release. Use
object functions instead. For more information, see Compatibility Considerations.
A VISA-VXI or VISA-GPIB-VXI object.
memunmap(obj) unmaps memory space
previously mapped by the
Create the VISA-VXI object
vv associated with a VXI chassis
with index 0, and a Keysight® E1432A digitizer with logical address 130.
vv = visa('keysight','VXI0::130::INSTR'); fopen(vv)
Map 16 bytes in the A16 address space.
Read the first and second instrument registers.
reg1 = mempeek(vv,0,'uint16'); reg2 = mempeek(vv,2,'uint16');
memunmap to unmap the memory, and disconnect
vv from the instrument.
When the memory space is unmapped, the
property is set to
0 and the
MappedMemoryBase property is set to
Version HistoryIntroduced before R2006a
visa object interface will be removed
Use of this function with a
visa object will be removed. To access a
VISA resource, use a
object with its functions and properties instead.
The recommended functionality has additional capabilities and improved performance. See Transition Your Code to visadev Interface for more information about using the recommended functionality.