WaitSRQ
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. |