Measurement-computing GPIB-488 Instrukcja Użytkownika Pobierz pdf (Strona 77)

Chapter 4 GPIB 488.2 Library Reference

GPIB-488 4-9 Programming Reference Manual

PassControl

Makes another device the Active Controller.

Syntax

C PassControl(int board, short address)

Parameters

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

applications, this value is 0.

address is an integer representing the GPIB address of the device that is to become the

controller. The low byte of the integer contains the device's primary GPIB address. The high

byte of the address contains the device's secondary GPIB address. If the device has no

secondary address, the high byte of

address is 0.

Returns

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

When this routine is executed, the GPIB Take Control (TCT) command is issued. This

forces the Active Controller to pass control to the device at the specified address. This device

must have Controller capability.

Example

This example would make the device connected to Board 0 and whose GPIB address is 6 the

Active Controller.

C PassControl(0, 6);

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Measurement-computing GPIB-488 Instrukcja Użytkownika Strona 77