Measurement-computing GPIB-488 Bedienungsanleitung PDF herunterladen (Seite 33)

Chapter 3 GPIB 488.1 Library Reference

Programming Reference Manual 3-20 GPIB-488

IBEOT

Enables/Disables assertion of EOI on write operations.

Syntax

C ibeot (int boarddev, int eot)

Parameters

boarddev is an integer containing the board or device handle. Here it represents a GPIB

Interface Board or a device. This value is obtained by calling the

ibfind routine.

eot is an integer which defines whether or not EOI is to be asserted. If eot is non-zero then

EOI is asserted automatically when the last byte of the message is sent. If

eot is 0, then EOI

is not asserted.

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

This call is used to temporarily change the default EOT setting.

It is useful to automatically send EOI with the last data byte in situations where variable

length data is being sent. When EOI is enabled, you do not need to send an EOS character.

If this call specifies a device, then EOI is asserted/unasserted on all writes to that device.

Likewise, if the call specifies a board, then EOI is asserted/unasserted on all writes from that

board. To assert EOI with an EOS, use the

ibeos routine. This call remains in effect until one

of the following occurs:

• Another ibeot call is made.

• ibonl or ibfind is called.

• The system is re-started.

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Measurement-computing GPIB-488 Bedienungsanleitung Seite 33