HP E8491A manual HP Visa

Block Transfers using	This program performs a block transfer of 60,000 readings using the
HP VISA	HP E1563A digitizer and the HP VISA function viMoveIn32.

//1563visa.CPP - This program configures the HP E1563A digitizer using its

//VXIplug&play driver and then transfers a block of 60,000 readings from

//the digitizer’s FIFO memory to the computer using the VISA viMoveIn32

//function.

#include "hpe1563.h"// include the driver header file #include "visa.h"

#include <stdio.h> #include <stdlib.h> #include <windows.h>

//project files: 1563visa.cpp, hpe1563.lib, VISA.lib

//specify the addressing path

#define E1563 "VXI0::64::INSTR" // VXI addressing

// prototypes

void check(ViSession vi, ViStatus error); void err_handler(ViSession vi, ViStatus err);

void main(void)

{

ViSession vi;

ViStatus errStatus, err; ViInt32 rdgs[60000];

ViReal64 range;// range variable for reading conversions ViInt16 *dataPtr;// pointer to cast readings to 16-bit integers int i;

ViChar err_message[256];

//open a VXIplug&play device session and reset the digitizer errStatus = hpe1563_init(E1563,0,1,&vi);

if( VI_SUCCESS > errStatus)

{

hpe1563_error_message( vi, errStatus, err_message); printf("Unable to open %s\n", E1563);

printf("hpe1563_init() returned error message %s\n", err_message); return;

}

//enable digitizer error detection

hpe1563_errorQueryDetect(vi, 1);

//set a 5s timeout period to allow functions to complete errStatus = hpe1563_timeOut(vi, 5000);

check(vi, errStatus);

//configure the digitizer to take 60,000 post-trigger readings

//not to exceed 4V on channel 1

errStatus=hpe1563_configure(vi, 1, 4.0, 60000, 1); check(vi, errStatus);

40 VXI Programming Using the IEEE 1394 Serial Bus Chapter 3