Measurement-computing GPIB-488 Bedienungsanleitung PDF herunterladen (Seite 86)

Chapter 4 GPIB 488.2 Library Reference

Programming Reference Manual 4-18 GPIB-488

Send

Sends data to one GPIB device.

Syntax

C Send (int board, short address,char data[],

long count, int eotmode)

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 to receive the data.

data is the string of data which is sent to the device.

count specifies the maximum number of data bytes which are to be sent to the device.

eotmode is the flag used to signal the end of data.

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 specified GPIB board is addressed as a Talker, the

designated GPIB device is addressed as a Listener and the number of bytes (specified by

count) in data is sent. Values for eotmode are:

•

NLend—Send NL (Line Feed) with EOI after last data byte.

•

DABend—Send EOI with the last data byte in the string.

•

NULLend—Do not mark the end of the transfer.

These constants are defined in the header file.

Example

In this example, GPIB board 0 sends an identification query to the GPIB device at address 3.

End of data is signalled by an EOI.

C Send (0, 3, "*IDN?", DABend)

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