Agilent Technologies E3632A Application Programs ++ Example for Gpibieee, End of Program 134

Chapter 6 Application Programs

C++ Example for GPIB(IEEE 488)

...continued

/* Open communication (session) with power supply */ viOpenDefaultRM (&defaultRM);

viOpen (defaultRM, Visa_address, 0,0, &power_supply);

/* Query the power supply id, read response and print */ viPrintf (power_supply, "*IDN?\n");

viScanf (power_supply, "%s", &reply_string);
printf ("Instrument identification string:\n	%s\n\n", reply_string);

/* Initialize Power Supply */ viPrintf (power_supply, "*RST\n"); viPrintf (power_supply, "Current 2\n"); viPrintf (power_supply, "Output on\n");

printf("Voltage Current\n\n");

/* Set power on condition			*/
/* Set Current		limit to 2A	*/
/*	Turn output	on	*/
/*	Print heading		*/

/* Step from 0.6v to 0.8 volt in .02volt steps */
for(voltage =.6;voltage <<=.8001;voltage +=.02)
{
viPrintf (power_supply, "Volt %f\n",voltage);		/*set voltage	*/
printf("%.3f",voltage);		/* print power supply setting */
delay(500);	/* allow output to settle for 500 msec */
viPrintf(power_supply,"Measure:Current?\n");		/*measure output current	*/
viScanf (power_supply, "%lf",¤t);		/* retrieve reading	*/
printf("	%.3lf\n",current);	/* print reading	*/
}
viPrintf (power_supply, "Output Off\n");		/* turn off output	*/
/* Close communication session */

viClose (power_supply); viClose (defaultRM);

}

/* Pauses for a specified number of milliseconds. */ void delay( clock_t wait )

{

clock_t goal; clock_t delay; wait = wait/1000;

delay = (clock_t)wait * CLOCKS_PER_SEC; goal = delay + clock();

while( goal > clock() );

}

End of Program

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