VISA Data Type

Definition

Description

ViUInt32

unsigned long

A 32-bit unsigned integer.

ViPUInt32

ViUInt32 *

The location of a 32-bit unsigned integer.

ViAUInt32

ViUInt32 *

The location of a 32-bit unsigned integer.

ViInt32

signed long

A 32-bit signed integer.

ViPInt32

ViInt32 *

The location of a 32-bit signed integer.

ViAInt32

ViInt32 *

The location of 32-bit signed integer.

ViUInt16

unsigned short

A 16-bit unsigned integer.

ViPUInt16

ViUInt16 *

The location of a 16-bit unsigned integer.

ViAUInt16

ViUInt16 *

The location of a 16-bit unsigned integer.

ViInt16

signed short

A 16-bit signed integer.

ViPInt16

ViInt16 *

The location of a 16-bit signed integer.

ViAInt16

ViInt16 *

The location of 16-bit signed integer.

ViUInt8

unsigned char

An 8-bit unsigned integer.

ViPUInt8

ViUInt8 *

The location of an 8-bit unsigned integer.

ViAUInt8

ViUInt8 *

The location of an 8-bit unsigned integer.

ViInt8

signed char

An 8-bit signed integer.

ViPInt8

ViInt8 *

The location of an 8-bit signed integer.

ViAInt8

ViInt8 *

The location of an 8-bit signed integer.

ViAddr

void *

A type that references another data type.

ViPAddr

ViAddr *

The location of a ViAddr.

ViChar

char

An 8-bit integer representing an ASCII character.

ViPChar

ViChar *

The location of a ViChar.

ViByte

unsigned char

An 8-bit unsigned integer representing an extended ASCII character.

ViPByte

ViByte *

The location of a ViByte.

ViBoolean

ViUInt16

A type that is either VI_TRUE or VI_FALSE.

ViPBoolean

ViBoolean *

The location of a ViBoolean.

ViBuf

ViPByte

The location of a block of data.

ViPBuf

ViPByte

The location of a block of data.

ViString

ViPChar

The location of a NULL-terminated ASCII string.

ViPString

ViPChar

The location of a NULL-terminated ASCII string.

ViStatus

ViInt32

Values that correspond to VISA-defined completion and error codes.

ViPStatus

ViStatus *

The location of the completion and error codes.

ViRsrc

ViString

A ViString type.

ViPRsrc

ViString

A ViString type.

ViAccessMode

ViUInt32

Specifies the different mechanisms that control access to a resource.

ViBusAddress

ViUInt32

Represents the system dependent physical address.

ViBusSize

ViUInt32

Represents the system dependent physical address size.

ViAttr

ViUInt32

Identifies an attribute.

ViVersion

ViUInt32

Specifies the current version of the resource.

ViPVersion

ViVersion *

The location of ViVersion.

ViAttrState

ViUInt32

Specifies the type of attribute.

ViPAttrState

void *

The location of ViAttrState.

ViVAList

va_list

The location of a list of variable number of parameters of differing types.

ViEventType

ViUInt32

Specifies the type of event.

ViPEventType

ViEventType *

The location of a ViEventType.

ViEventFilter

ViUInt32

Specifies filtering masks or other information unique to an event.

ViObject

ViUInt32

Contains attributes and can be closed when no longer needed.

ViPObject

ViObject *

The location of a ViObject.

ViSession

ViObject

Specifies the information necessary to manage a communication channel with a resource.

ViPSession

ViSession *

The location of a ViSession.

ViFindList

ViObject

Contains a reference to all resources found during a search operation.

ViPFindList

ViFindList *

The location of a ViFindList.

ViEvent

ViObject

Contains information necessary to process an event.

ViPEvent

ViEvent *

The location of a ViEvent.

ViHndlr

ViStatus( *)
(ViSession#
ViEventType#
ViEvent#
ViAddr)

A value representing an entry point to an operation for use as a callback.

ViReal32

float

A 32-bit single-precision value.

ViPReal32

ViReal32 *

The location of a 32-bit single-precision value.

ViReal64

double

A 64-bit double-precision value.

ViPReal64

ViReal64 *

The location of a 64-bit double-precision value.

ViJobId

ViUInt32

The location of a variable that will be set to the job identifier.

ViKeyId

ViString

The location of a string.