WaitSRQ

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Purpose

Wait until a device asserts the GPIB Service Request (SRQ) line.

Format

C

void WaitSRQ (int boardID, short *result)

Visual Basic

CALL WaitSRQ (boardID%, result%)

Interactive Control (Usage Notes)

WaitSRQ

Input

boardID

The interface number

Output

result

State of the SRQ line: non-zero if line is asserted, zero if line is not asserted

Description

WaitSRQ waits until either the GPIB SRQ line is asserted or the timeout period has expired (see ibconfig, option IbcTMO). When WaitSRQ returns, result contains a non-zero if SRQ is asserted. Otherwise, result contains a zero. Use TestSRQ to get the current state of the GPIB SRQ line. Use WaitSRQ to wait until SRQ is asserted.

Possible Errors

ECIC	The interface is not able to detect the state of the SRQ line because it is not the Controller-In-Charge.
EDVR	The NI-488.2 driver is either configured incorrectly or is not properly installed.
EHDL	boardID is out of range.
ELCK	The requested operation could not be performed because of an existing lock by another process.
ENEB	The interface is not installed or is not properly configured.
EOIP	Asynchronous I/O is in progress.