Measurement Computing GPIB-488 - Manual (Page 98)

Chapter 4 GPIB 488.2 Library Reference
Programming Reference Manual 4-30 GPIB-488
WaitSRQ
Wait until a device asserts SRQ.
Syntax
C WaitSRQ(int board, short *result)
Parameters
board is an integer which identifies the GPIB board to use for this operation. In most
applications, this value is 0.
Returns
result indicates whether or not an SRQ occurred. If an SRQ occurs before the timeout
expires, result = 1. Otherwise, result = 0.
ibsta will contain a 16-bit status word as described in Appendix B, IBSTA .
iberr will contain an error code, if an error occurred.
Usage Notes
This call suspends operation until a device requests service or a timeout occurs. Follow this
call with a
FindRQS call to determine which device needs service.
Example
Wait for a GPIB device to request service and then ascertain if device 6 or 7 requires service.
C short addresslist[3] = {6,7,NOADDR};
short resultlist[3];
short result;
WaitSRQ (0,&result);
if (result == 1)
{FindSRQ (0, addresslist, resultlist)}