Measurement-computing GPIB-488 Instrukcja Użytkownika Pobierz pdf (Strona 90)

Chapter 4 GPIB 488.2 Library Reference

Programming Reference Manual 4-22 GPIB-488

SendList

Sends data to multiple GPIB devices.

Syntax

C SendList(int board, short addresslist[],

char data[], long count, int eotmode)

Parameters

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

applications, this value is 0.

addresslist is an array of GPIB addresses, terminated by the value NOADDR. These

addresses identify the devices on the system to reset.

data is the string containing the data to send.

count specifies the maximum number of data bytes to send 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 and the

designated GPIB devices as Listeners. The board then sends the given number of bytes of data

from the data string to the listening GPIB devices.

•

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 files.

Example

In this example, GPIB board 0 sends an identification query to the GPIB devices at addresses

6 and 7. End of data is signalled by an EOI.

C short addresslist[3] = {6, 7, NOADDR};

SendList (0, addresslist, "*IDN?", 5, DABend)

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