HP E8491A manual Error checking routine

// set an immediate trigger

errStatus = hpe1563_trigEvent(vi, 1, hpe1563_TRIG_IMM, 0.0); check(vi, errStatus);

// set the minimum sample period

errStatus = hpe1563_sampTim(vi, hpe1563_SAMP_TIM_MIN); check(vi, errStatus);

//disable digitizer error detection hpe1563_errorQueryDetect(vi, 0);

//initiate the digitizer

errStatus = hpe1563_initImm(vi);

//pause 78 ms (1.3e-6 * 60000) to allow readings to complete Sleep (78);

//transfer the (60,000) readings from the digitizer using the VISA

//function viMoveIn32 - use the same session name (vi) opened for

//VXIplug&play

err = viMoveIn32(vi, VI_A16_SPACE, 0x08, 60000, (ViPUInt32)rdgs); if(err < VI_SUCCESS) err_handler(vi, err);

//confirm readings transferred are valid dataPtr = (ViInt16 *)rdgs;

//query digitizer reading range

errStatus = hpe1563_range_Q(vi, 1, &range); printf("Reading samples are:\n\n");

for (i=0; i<10; i+=2)

{

printf("%lf\n\n",dataPtr[i]*range/32768);

}

//reset digitizer following the transfer errStatus = hpe1563_reset(vi);

//close the device session

hpe1563_close(vi);// HP VXIplug&play session

}

//************************************************************ // error checking routine

void check (ViSession vi, ViStatus errStatus)

{

ViInt32 inst_err;

ViChar err_message[256];

if(VI_SUCCESS > errStatus)

{

if(hpe1563_INSTR_ERROR_DETECTED == errStatus)

{

Chapter 3 VXI Programming Using the IEEE 1394 Serial Bus 41