Measurement-computing GPIB-488 Manuel d'utilisateur télécharger pdf (Page 94)

Chapter 4 GPIB 488.2 Library Reference

Programming Reference Manual 4-26 GPIB-488

TestSRQ

Evaluate state of SRQ line.

Syntax

C TestSRQ(int board, short *result)

Parameters

board is an integer which identifies the GPIB board to be used for this operation. In most

applications, this value is 0.

Returns

result is equal to 1 if the GPIB SRQ line is asserted. result = 0 if the GPIB SRQ line is

unasserted.

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

TestSRQ will not alter the state of the SRQ line.

Example

This example tests to see if SRQ is asserted.

C Short result;

TestSRQ (0, &result);

if (result == 1)

{ /* SRQ is asserted */}

else

{ /* No SRQ at this time */}

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Measurement-computing GPIB-488 Manuel d'utilisateur Page 94