National Instruments Switch Executive Manuel utilisateur

QUICK REFERENCE GUIDE

National InstrumentsTM

Switch Executive

This document contains quick reference information about examples, VIs/functions,

route specification strings, and error codes for NI Switch Executive (NISE).

Examples

ICON VI/FUNCTION NAME AND DESCRIPTION

Using Find Route to Connect Two Channels

Uses Find Route to determine a path between two channels and then

connects the path.

Sequenced Connect And Disconnect

Uses Connect and Disconnect to sequence through different switching

system states.

Route Specification Syntax Example

Demonstrates the many different aspects of route specifications, including

usage of routes, route groups, fully specified routes, and combinations of

route types.

Interactive Control

Uses many of the API functions through an interactive tool.

Getting Started

Opens a session and makes a route connection.

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NI Switch Executive Quick Reference Guide 2 ni.com

Functions†

ICON TYPE PARAMETER VALUE TO SET, COMMENTS

NISEConstString virtualDeviceName Name of the NISE virtual device to

open a session to

NISEConstString options Used to pass information to each of

the IVI devices on startup

NISESession* [out] sessionHandle Reference to virtual device session

NISESession sessionHandle Reference to virtual device session

NISEConstString connectSpec String describing the connections

to be made

NISEInt32 multiconnectMode • USE_DEFAULT_MODE (–1)

• NO_MULTICONNECT (0)

• MULTICONNECT_ROUTES (1)

NISEBoolean waitForDebounce • NISE_TRUE

• NISE_FALSE

NISESession sessionHandle Reference to virtual device session

NISEConstString connectSpec String describing the connections

to be made

NISEConstString disconnectSpec String describing the

disconnections to be made

niSE Connect And Disconnect

(niSE_ConnectAndDisconnect)

Connects the routes specified by the connection specification.

When connecting, it may allow for multiconnection based on the

multiconnection mode. Disconnects the routes specified in the

disconnection specification. This VI/ function is useful for switching

from one state to another state.

niSE Connect

(niSE_Connect)

Connects the routes specified by the connection specification.

When connecting, it may allow for multiconnection based on the

multiconnection mode.

niSE Close Session

(niSE_CloseSession)

Reduces the reference count of open sessions by one. If the reference count

goes to zero, any open IVI switch sessions are closed.

niSE Open Session

(niSE_OpenSession)

Opens a session to a specified NISE virtual device. Opens communications

with all of the IVI switches associated with the specified NISE virtual device.

Returns a session handle used to identify the virtual device in all subsequent

NISE calls.

† Function names for C, C++, LabWindowsTM/CVITM, and Visual Basic are in parentheses.

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ICON TYPE PARAMETER VALUE TO SET, COMMENTS

niSE Connect And Disconnect (continued)

NISEInt32 multiconnectMode • USE_DEFAULT_MODE (–1)

• NO_MULTICONNECT (0)

• MULTICONNECT_ROUTES (1)

NISEInt32 operationOrder • BREAK_BEFORE_MAKE (1)

• BREAK_AFTER_MAKE (2)

NISEBoolean waitForDebounce • NISE_TRUE

• NISE_FALSE

NISESession sessionHandle Reference to virtual device session

NISEConstString disconnectSpec String describing the

disconnections to be made

NISESession sessionHandle Reference to virtual device session

NISEConstString channel 1 Channel name of one of the end

points of the route to find

NISEConstString channel 2 Channel name of one of the end

points of the route to find

NISEBuffer* [out] routeSpec Returns the path between the

channels if PATH_EXISTS or

PATH_AVAILABLE

NISEInt32 * [in/out] routeSpecSize • Input = size of the route string

buffer being passed

• Return = the size required to hold

the entire route string

NISEInt32 * [out] routeCapability • PATH_AVAILABLE (1)

• PATH_EXISTS (2)

• PATH_UNSUPPORTED (3)

• RSRC_IN_USE (4)

• SOURCE_CONFLICT (5)

• CHANNEL_NOT_AVAILABLE (6)

• CHANNELS_HARDWIRED (7)

Functions

continued on the next page

niSE Find Route

(niSE_FindRoute)

Finds an existing or potential route between channel 1 and channel 2.

niSE Disconnect All

(niSE_DisconnectAll)

Disconnects all connections on every IVI switch device managed by the

NISE session reference passed to this function.

niSE Disconnect

(niSE_Disconnect)

Disconnects the routes specified in the disconnection specification.

3 NI Switch Executive Quick Reference Guide

National Instruments Corporation

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Functions (continued)

ICON TYPE PARAMETER VALUE TO SET, COMMENTS

NISESession sessionHandle Reference to virtual device session

NISEBoolean* [out] isDebounced • NISE_TRUE

• NISE_FALSE

NISESession sessionHandle Reference to virtual device session

NISEInt32 maxTime Amount of time to wait (in ms) for

the debounce to complete before

timing out

Additional C/C++/Visual Basic Functions

C, C++, and Visual Basic users have two additional functions available that are not

needed in LabVIEW.

TYPE PARAMETER VALUE TO SET, COMMENTS

Clears the last queried error from memory.

NISESession sessionHandle Reference to virtual device session

Queries for and returns the most recent error.

NISESession sessionHandle Reference to virtual device session

NISEStatus* [out] errorNumber Returns the error number of the first

error that occurred in the session since

the error was last cleared

NISEBuffer* [out] errorDescription Returns a string describing the error

NISEInt32* [out] errorDescriptionSize • Input = size of the error description

buffer being passed

• Return = size required to hold entire

string

niSE_GetError

niSE_ClearError

niSE Wait For Debounce

(niSE_WaitForDebounce)

Waits for all of the switches in the NISE virtual device to debounce.

niSE Is Debounced

(niSE_IsDebounced)

Checks to see if the switching system is debounced or not.This VI/function

does not wait for debouncing to occur and returns true if the system is fully

debounced.

NI Switch Executive Quick Reference Guide 4 ni.com

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Route Specification Strings

Route specification strings are the paths connecting two channels and are composed of

one or more routes delimited by ampersands (&). For example, in the following line of

syntax, there are three defined routes or route groups:

routeOrGroup & routeOrGroup & routeOrGroup...

where routeOrGroup can be:

• Route name

• Route group name

• Two endpoint channels to be connected that are delimited by ->. NISE dynamically

determines the path between the endpoints. In this mode, a hardwire alias name may

be substituted for the endpoints.

channel -> channel

• Fully specified path enclosed in square brackets consisting of one or more endpoint

channels delimited by ->:

[channel -> channel -> channel...]

where channel can be:

• A channel alias name

• A unique name created by combining the IVI device logical name and IVI

channel name separated by a forward slash (/) delimiter. For example,

(device/iviChan).

Note • Any channel, other than an endpoint, within a route specification

string

must

be reserved for routing or directly hardwired to one of

the endpoint channels.

•Channels used as endpoints must

not

be reserved for routing

channels.

• When connecting a route, the list of channels must obey the

exclusion rules by both explicitly in the route specification string, as

well as implicitly by any previous connections. Exclusion violations

result in an error.

The following are samples of route specification strings for a matrix:

• [SampleMatrix1/c0->SampleMatrix1/r1->SampleMatrix1/c4]

• [Scope->R3->SampleMatrix1/c6]

• ArbToInput & ScopeToOutput

• PowerDevice & [Scope->R3->UUT_Out]

• DCPower->UUT_Vcc

Each supported ADE has an associated Route Specification String Example. Refer to the

examples for the appropriate ADE to see how route specification strings are used when

programming.

National Instruments Corporation 5 NI Switch Executive Quick Reference Guide

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Error Codes

VALUE VALUE

(HEX) (DECIMAL) DESCRIPTION

INTERNAL

FFFF8EB8 –29000 An internal error has occurred. Please contact National Instruments

technical support.

IVI_DRIVER_NO_SIMULATION

FFFF8EB7 –29001 The IVI-specific driver does not support simulation mode.

INVALID_VIRTUAL_DEVICE_NAME

FFFF8EB6 –29002 The specified NI Switch Executive virtual device is invalid or does not

exist.

INVALID_SESSION

FFFF8EB5 –29003 This session is not a valid NI Switch Executive virtual device session.

INSUFFICIENT_SYSTEM_RESOURCES

FFFF8EB4 –29004 NI Switch Executive requires system resources that are currently

unavailable. Close other applications and try again.

AMBIGUOUS_NAME

FFFF8EB3 –29005 The specified name is ambiguous. Specify a unique name.

INVALID_IVI_LOGICAL_NAME

FFFF8EB2 –29006 The IVI logical name is invalid or the device does not exist.

INVALID_ROUTE_SPECIFICATION

FFFF8EB1 –29007 The route specification string contains invalid characters or could not

be understood.

EVAL_TIMED_OUT

FFFF8EAF –29008 NI Switch Executive is running with an evaluation license and the time

limit for this session has expired. Restart your application to continue

evaluating.

INVALID_NAME

FFFF8EAE –29009 The name contains invalid characters.

RUNTIME_IMPORTING_EVAL

FFFF8EAD –29010 This configuration was created with an evaluation license. Deployment

licenses can only import configurations created with a development

license. Import the configuration into a development license system and

re-export the file to resolve the problem.

EVAL_EXPIRED_IMPORTING

FFFF8EAC –29011 NI Switch Executive cannot import configurations once the evaluation

period has expired.

RUNTIME_EXPORTING

FFFF8EAB –29012 NI Switch Executive deployment licenses cannot export configurations.

The operation requested requires a development license.

IMPORTING_FILE_ACCESS

FFFF8EAA –29013 There was an error when accessing (open or read) the NI Switch

Executive configuration file.

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VALUE VALUE

(HEX) (DECIMAL) DESCRIPTION

IMPORTING_FILE_FORMAT

FFFF8EA9 –29014 The file is not a valid NI Switch Executive configuration file.

INVALID_END_POINTS

FFFF8EA8 –29015 The endpoints of the path do not match the existing endpoints.

INVALID_PATH

FFFF8EA7 –29016 Cannot connect this path on the device.

INVALID_CHANNEL_SPECIFICATION

FFFF8EA6 –29017 The channel specification string contains invalid characters or could not

be understood.

DLL_NOT_FOUND

FFFF8EA5 –29018 A needed DLL was not found. Check to ensure that NI Switch

Executive is properly installed and that all needed DLLs are in the

search path.

FUNCTION_NOT_FOUND

FFFF8EA4 –29019 A needed function in a DLL could not be found. Although the DLL exists,

it may be an incorrect version and may not contain the needed function.

MAX_TIME_EXCEEDED

FFFF8EA3 –29020 One or more switching devices have not debounced within the specified

maximum time.

ROUTE_ALREADY_EXISTS

FFFF8EA2 –29021 The route you are trying to connect or a route with the same endpoints

is already connected.

ROUTE_EXISTS_AS_UNSHAREABLE

FFFF8EA1 –29022 The route you are trying to connect already exists as a non-multiconnect

route. It must be disconnected before you can make a multiconnect

route.

ROUTE_EXISTS_BY_DIFFERENT_PATH

FFFF8EA0 –29023 The route you are trying to connect already exists but is connected

through a different path than the one specified.

ROUTE_DOES_NOT_EXIST

FFFF8E9F –29024 The specified route does not exist. You cannot disconnect a route that

does not exist.

PARTIAL_DISCONNECT

FFFF8E9E –29025 Device specific errors occurred during the disconnect operation.

RESOURCE_IN_USE

–29026 A connection could not be made because one of the switch resources

needed to make the connection is used as part of another

currently connected route.

FILE_WRITE

FFFF8E9D –29027 An error occurred while attempting to write to file.

Error Codes

continued on the next page

National Instruments Corporation 7 NI Switch Executive Quick Reference Guide

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CVITM, IVITM,LabVIEWTM, National InstrumentsTM, NITM, ni.comTM, and TestStandTM are trademarks of

National Instruments Corporation. Product and company names mentioned herein are trademarks or

trade names of their respective companies. For patents covering National Instruments products,

refer to the appropriate location: Help»Patents in your software, the patents.txt file on your CD,

or ni.com/patents.

*371308A-01*

371308A-01 Jul04

Switch Control Functions

Miscellaneous Functions

Error Codes (continued)

VALUE VALUE

(HEX) (DECIMAL) DESCRIPTION

FILE_READ

FFFF8E9C –29028 An error occurred while attempting to read from file.

INVALID_MULTICONNECT_MODE

FFFF8E9B –29029 Invalid multiconnect mode.

INVALID_OPERATION_ORDER

FFFF8E9A –29030 Invalid operation order.

CONFIG_CHANNEL_CONFLICT

FFFF8E99 –29031 A reserved for routing channel required for connecting this route is

already in use by another route.

SOURCE_CHANNEL_CONFLICT

FFFF8E98 –29032 Connecting this route would cause excluded channels to be shorted

together.

ROUTE_EXISTS_WITH_DIFFERENT_MODE

FFFF8E97 –29033 The route you are trying to connect already exists with a different

multiconnect mode. It must be disconnected before you can make this

connection.

DISABLED_CHANNEL

FFFF8E96 –29034 The channel you are trying to use has been disabled for this virtual

device.

CANNOT_CONNECT_TO_ITSELF

FFFF8E95 –29035 You cannot connect a channel to itself. Either your endpoint channels are

the same or they reside on the same hardwire.

ROUTE_NOT_FOUND

FFFF8E94 –29036 Route cannot be found between the specified endpoints.

Programming Flow

The following diagram shows a typical programming flow for NI Switch Executive.

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