List of VISA Functions

This version of the IO Libraries Suite supports Windows and Linux. Available utilities, APIs, help files and features vary by operating system. Variations are flagged in help with these icons: for Windows and for Linux.

This lists show VISA functions implemented by Keysight VISA grouped by type and flagged or for which operating system (OS) they are supported in. An asterisk (*) indicates there may be limited support depending on the operating system.

The data types for the VISA function parameters (for example, ViSession) are defined in the VISA declarations file.

Function	OS	Usage
		Opening/Closing Sessions
viOpenDefaultRM		Open default RM session
viOpen	*	Open session
viClose		Close session
		Control
viAssertTrigger	*	Assert software or hardware trigger
viAssertUtilSignal		Asserts the specified utility bus signal
viGetAttribute		Get attribute
viMemAlloc		Allocate memory from a device’s memory region
viMemAllocEx		Allocate memory from a device’s memory region
viMemFree		Free memory previously allocated using viMemAlloc() or viMemAllocEx().
viMemFreeEx		Free memory previously allocated using viMemAlloc() or viMemAllocEx().
viSetAttribute		Set attribute
viStatusDesc		Get status code description
viTerminate		Terminate asynchronous operation
viLock		Lock resource
viUnlock		Unlock resource
viMapTrigger		Map trigger source line to destination line
viUnmapTrigger		Map trigger line to another trigger line
		Event Handling/Interrupts
viAssertIntrSignal	*	Asserts the specified device interrupt or signal
viEnableEvent	*	Enable event
viDisableEvent	*	Disable event
viDiscardEvents	*	Discard events
viWaitOnEvent		Wait on event
viInstallHandler	*	Install handler
viUninstallHandler		Uninstall handler
viEventHandler	*	Event handler prototype
		VXI Specific Services
viVxiCommandQuery		Send device a command/query and/o retrieve a response
		Searching
viFindRsrc		Find device
viFindNext		Find next device
viParseRsrc		Parse resource string to get interface information
viParseRsrcEx		Parse resource string to get extended interface information
		Basic I/O
viRead		Read data from device
viWrite		Write data to device
viReadAsync		Read data asynchronously from device
viWriteAsync		Write data asynchronously to device
viClear		Clear a device
viReadToFile		Read data synchronously and store data in file
viWriteFromFile		Write data from file synchronously
viReadSTB		Read status byte
		Formatted I/O
viSetBuf		Set size of buffer
viBufRead		Unformatted read to formatted I/O buffers
viBufWrite		Unformatted write to formatted I/O buffers
viFlush		Flush read and write buffers
viPrintf		Convert, format, and send parameters to a device
viSPrintf		Write data to a buffer
viVPrintf		Convert, format, and send parameters to a device
viVSPrintf		Convert, format, and send parameters to a buffer
viScanf		Receive data from device, format and store data
viVScanf		Receive data from device, format and store data
viSScanf		Receive data from buffer, format and store data
viVSScanf		Receive data from buffer, format and store data
viQueryf		Formatted write and read operation
viVQueryf		Formatted write and read operation
		Memory I/O
viIn8		Read 8-bit value from memory space
viIn16		Read 16-bit value from memory space
viIn32		Read 32-bit value from memory space
viIn64		Read 64-bit value from memory space
viIn8Ex		Read 8-bit value from memory space (extended to support 64-bit offset).
viIn16Ex		Read 16-bit value from memory space (extended to support 64-bit offset).
viIn32Ex		Read 32-bit value from memory space (extended to support 64-bit offset).
viIn64Ex		Read 64-bit value from memory space (extended to support 64-bit offset).
viOut8		Write 8-bit value to memory space
viOut16		Write 16-bit value to memory space
viOut32		Write 32-bit value to memory space
viOut64		Write 64-bit value to memory space
viMove		Move data from source to destination
viMoveEx		Move a block of data (extended to support 64-bit offset).
viMoveAsync		Move data from source to destination asynchronously
viMoveAsyncEx		Move a block of data asynchronously (extended to support 64-bit offset).
viMoveIn8		Move 8-bit value from device memory to local memory
viMoveIn16		Move 16-bit value from device memory to local memory
viMoveIn32		Move 32-bit value from device memory to local memory
viMoveIn64		Move 64-bit value from device memory to local memory
viMoveIn8Ex		Move 8-bit value from device memory to local memory (extended to support 64-bit offset).
viMoveIn16Ex		Move 16-bit value from device memory to local memory (extended to support 64-bit offset).
viMoveIn32Ex		Move 32-bit value from device memory to local memory (extended to support 64-bit offset).
viMoveIn64Ex		Move 64-bit value from device memory to local memory (extended to support 64-bit offset).
viMoveOut8		Move 8-bit value from local memory to device memory
viMoveOut16		Move 16-bit value from local memory to device memory
viMoveOut32		Move 32-bit value from local memory to device memory
viMoveOut64		Move 64-bit value from local memory to device memory
viMoveOut8EX		Move 8-bit value from local memory to device memory (extended to support 64-bit offset).
viMoveOut16EX		Move 16-bit value from local memory to device memory (extended to support 64-bit offset).
viMoveOut32EX		Move 32-bit value from local memory to device memory (extended to support 64-bit offset).
viMoveOut64EX		Move 64-bit value from local memory to device memory (extended to support 64-bit offset).
viMapAddress		Map memory space
viMapAddressEx		Map memory space (extended to support 64-bit offset).
viUnmapAddress		Unmap memory space
viPeek8		Read 8-bit value from address
viPeek16		Read 16-bit value from address
viPeek32		Read 32-bit value from address
viPeek64		Read 64-bit value from address
viPoke8		Write 8-bit value to address
viPoke16		Write 16-bit value to address
viPoke32		Write 32-bit value to address
viPoke64		Write 64-bit value to address
		Interface Specific Services
viGpibControlREN		Control GPIB REN interface line
viGpibControlATN		Control GPIB ATN interface line
viGpibCommand		Write GPIB command bytes on the bus
viGpibPassControl		Tell GPIB device to become Controller in Charge (CIC)
viGpibSendIFC		Pulse Interface Clear (IFC) line
		PXI Specific Services
viPxiReserveTriggers		Reserve multiple trigger lines that the caller can then map and/or assert
		USB Specific Services
viUsbControlIn		Request arbitrary data from the USB device on the control port
viUsbControlOut		Send arbitrary data to the USB device on the control port

List of VISA Functions

Opening/Closing Sessions

Control

Event Handling/Interrupts

VXI Specific Services

Searching

Basic I/O

Formatted I/O

Memory I/O

Interface Specific Services

PXI Specific Services

USB Specific Services