Agilent Technologies B1500A User's Guide download pdf (Page 161)

Agilent B1500 VXIplug&play Driver User’s Guide, Edition 3 4-5

Programming Examples for C++ Users

Programming Basics

/* Starting the session */

ret = agb1500_init("GPIB0::17::INSTR", VI_TRUE, VI_TRUE, &vi); /* 33 */

if ( ( ret < VI_SUCCESS ) || ( vi == VI_NULL ) ) {

printf("Initialization failure.\n Status code: %d.\n", ret);

if ( vi != VI_NULL ) {

agb1500_error_message(vi, ret, err_msg);

printf("Error: %ld\n %s\n", ret, err_msg);

}

exit (ret);

} /* 41 */

ret = agb1500_reset(vi); /* resets B1500 43 */

ret = agb1500_timeOut(vi, 60000); /* sets 60 second timeout */

ret = agb1500_errorQueryDetect(vi, VI_TRUE); /* turns on error detection */

perform_meas(vi, ret); /* calls perform_meas subprogram 47 */

/* ret = agb1500_cmd(vi, "aa"); sends an invalid command */

/* check_err(vi, ret); checks check_err subprogram operation */

/* Closing the session

ret = agb1500_close(vi); 52 */

check_err(vi, ret);

return VI_SUCCESS; /* 55 */

}

Line Description

33 Establishes the software connection with the Agilent B1500.

The above example is for the Agilent B1500 on the GPIB address 17.

Confirm the GPIB address of your B1500, and set the address correctly instead of “17”.

34 to 41 Checks the status returned by the agb1500_init function. Displays the error message

and stops the program execution if an error status is returned.

43 to 45 Resets the Agilent B1500, sets the driver I/O time out to 60 seconds, and enables the

automatic instrument error checking.

47 Calls the perform_meas subprogram (line 22).

48 to 49 Should be deleted or commented out before executing the program. The lines are just

used to check the operation of the check_err subprogram.

52 Disables the software connection with the Agilent B1500.

53 Calls the check_err subprogram to check if an error status is returned for the line 52.

55 to 56 End of the main program.

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Agilent Technologies B1500A User's Guide Page 161