Agilent Technologies C-Size VXIbus Systems Manual de usuario descargar pdf (Pagina 143)

C Language Program

/* This program sends the *IDN? command to the Command Module as a */

/* way to determine if the computer is communicating with the mainframe */

/* Include the following header files */

#include <stdio.h>

#include <cfunc.h>/* This file is from the GPIB Command Library Disk */

#define ADDR 70900/* I/O path from the PC to the Command Module */

/**************************************************/

void main(void)/* Run the program */

{

char message[80];

int length = 80;

IOOUTPUTS(ADDR, "*IDN?", 5);/* send *IDN? command */

IOENTERS(ADDR, message, &length);/* enter *IDN? response */

printf("%s\n", message);/* print*IDN? response */

}

COMM1B :

Embedded

Controller

Addressing

In systems containing message-based modules which are servants to the

Agilent E1499A embedded V/382 controller, the modules are programmed

from the VXIbus backplane rather than from the GPIB. The V/382

factory-set interface select code is 16.

Since no secondary address is required as when programming from the

VXIbus backplane, the logical address of the message-based module is

combined with the VXI interface select code.

For example, to program a message-based module with a logical address of

24, the OUTPUT statement in an BASIC program appears as:

OUTPUT 1624;"...

for logical addresses from 1 to 99

OUTPUT 160xxx;"...

for logical addresses from 100 to 255

See "Sending the *IDN? Command" in the section "GPIB Addressing" to

verify communication over GPIB, between the V/382 and the Agilent

C-Size Configuration Guide System Programming and Debugging 6-3

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Agilent Technologies C-Size VXIbus Systems Manual de usuario Pagina 143