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viAssertUtilSignal

NI-VISA 15.0 Help

Edition Date: June 2015

Part Number: 370131S-01

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Purpose

Asserts or deasserts the specified utility bus signal.

C Syntax

viStatus viAssertUtilSignal(ViSession vi, ViUInt16 line)

Visual Basic Syntax

viAssertUtilSignal& (ByVal vi&, ByVal line%)

Resource Classes

VXI BACKPLANE, VXI SERVANT

Parameters

Name Direction Description

vi

IN

Unique logical identifier to a session.

line

IN

Specifies the utility bus signal to assert. This can be the value VI_UTIL_ASSERT_SYSRESET, VI_UTIL_ASSERT_SYSFAIL, or VI_UTIL_DEASSERT_SYSFAIL.

Return Values

Completion Codes Description

VI_SUCCESS

Operation completed successfully.

Error Codes Description

VI_ERROR_INV_OBJECT

The given session reference is invalid.

VI_ERROR_NSUP_OPER

The given vi does not support this operation.

VI_ERROR_RSRC_LOCKED

Specified operation could not be performed because the resource identified by vi has been locked for this kind of access.

VI_ERROR_TMO

Timeout expired before operation completedS.

VI_ERROR_INV_LINE

The value specified by the line parameter is invalid.

Description

This operation can be used to assert either the SYSFAIL or SYSRESET utility bus interrupts on the VXIbus backplane. This operation is valid only on BACKPLANE (mainframe) and VXI SERVANT (servant) sessions.

Asserting SYSRESET (also known as HARD RESET in the VXI specification) should be used only when it is necessary to promptly terminate operation of all devices in a VXIbus system. This is a serious action that always affects the entire VXIbus system.


Related Topics

BACKPLANE Resource

SERVANT Resource

viAssertIntrSignal

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