Agilent Technologies E1326B Manual do Utilizador descarregar pdf (Página 240)

/* write command to command register */

/* wait for mm ready bit = 1 */

while(!READY);

iwpoke((unsigned short *)(base_addr_dmm + 0x08),command);

/* write parameter to parameter register */

/* wait for mm ready bit = 1 */

while (!READY);

iwpoke((unsigned short *)(base_addr_dmm + 0x0A),parameter);

/* save aperture time, range, and function for reading conversion */

if (command == 0)

aper = parameter;

else if (command == 2)

rng = parameter;

else if (command == 4)

func = parameter;

while(!DONE); /* wait until mm is done before sending the */

/* next command and parameters */

if(!NOERR) check_for_error(base_addr_dmm);

/* check for configuration errors */

}

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

void set_sample_period(char *base_addr_dmm, int command, unsigned

short parameter)

{

/* this function sets the multimeter sample period */

/* parameter variables */

unsigned short parm1 = 0, parm2 = 0;

/* convert parameter (sample period) to two bytes */

parm1 = parameter >> 8; /* upper byte */

parm2 = parameter & 0xFF; /* lower byte */

/* write command to command register */

/* wait for mm ready bit = 1 */

while(!READY);

iwpoke((unsigned short *)(base_addr_dmm + 0x08),command);

/* write upper byte to parameter register */

/* wait for mm ready bit = 1 */

while (!READY);

iwpoke((unsigned short *)(base_addr_dmm + 0x0A),parm1);

/* write lower byte to parameter register */

/* wait for mm ready bit = 1 */

while (!READY);

Continued on Next Page

Appendix C HP E1326B/E1411B Multimeter Register-Based Programming 241

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