AnsweredAssumed Answered

Agilent 33220A, Visual C++ simple sine wave program ?

Question asked by apurva0628 on Sep 1, 2010
Latest reply on Sep 8, 2010 by lhornburg

Like • Show 0 Likes0
Comment • 2

Hi there,

I am new to programming agilent devices thru VC++. Does anyone have the code to Generate a Standard(sine) wave on the waveform generator thru a VC++ or C++ program ?

Cheers,
MIshra

No one else has this question

Outcomes

2 Replies

apurva0628 Sep 8, 2010 12:57 AM
Mark Correct
Correct Answer
Found one and got it to work with VC++ 2008

Create A newm project under "win32 console application"

Include Visa32.lib

#include "stdafx.h"

#include <string.h>
#include <stdlib.h>
#include <stdio.h>
#include <visa.h>
#include <visatype.h>
#include <vpptype.h>
#include <visaext.h>

#pragma warning(disable:4996)

#define CHECK(func)\
do {\
ViStatus _s = (func);\
if (_s < 0)\
{\
fprintf(stderr, "Error: %s returned %d\n", #func, _s);\
exit(0);\
}\
} while (0)
/* Specify the default address */
#define DEFAULT_LOGICAL_ADDRESS "USB0::0x0957::0x0407::MY44028438::0::INSTR"

void main()
{
     ViSession viDefaultRM, Instrument;
     ViRsrc TxtAddress = DEFAULT_LOGICAL_ADDRESS;
     ViUInt32 actual;
     char SCPIcmd[10000];
     unsigned short i;
     CHECK(viOpenDefaultRM(&viDefaultRM));
     CHECK(viOpen(viDefaultRM, TxtAddress, VI_NULL, VI_NULL,&Instrument));

     /* Specify long seconds timeout for waveform download */
     CHECK(viSetAttribute(Instrument, VI_ATTR_TMO_VALUE, 40000));
     strcpy(SCPIcmd,"*RST\n"); /* Reset the function generator */
     CHECK(viWrite(Instrument, (ViBuf)SCPIcmd, (ViUInt32)strlen(SCPIcmd),&actual));
     strcpy(SCPIcmd,"*CLS\n"); /* Clear errors and status registers */
     CHECK(viWrite(Instrument, (ViBuf)SCPIcmd, (ViUInt32)strlen(SCPIcmd),&actual));


     /* Compute waveform */
     fprintf(stderr, "Computing Waveform...\n");
     strcpy(SCPIcmd, "DATA VOLATILE");
     for(i = 1; i <= 5; i++) /* Set rise time (5 points) */
     sprintf(SCPIcmd, "%s,%3.1f", SCPIcmd, (double)(i - 1)/5);
     for(i = 6; i <= 205; i++)
     strcat(SCPIcmd, ",1"); /* Set pulse width (200 points) */
     for(i = 206; i <= 210; i++) /* Set fall time (5 points) */
     sprintf(SCPIcmd, "%s,%3.1f", SCPIcmd, (double)(210 - i)/5);
     for(i = 211; i <= 4000; i++)
     strcat(SCPIcmd, ",0"); /* Set remaining points to zero */
     strcat(SCPIcmd,"\n");


     /* Doccwnload data points to volatile memory */
     fprintf(stderr,"Downloading Arb...\n");
     CHECK(viWrite(Instrument,(ViBuf)SCPIcmd, (ViUInt32)strlen(SCPIcmd),&actual));
     fprintf(stderr,"Download Complete\n");


     /* Set up arbitrary waveform and output */
     strcpy(SCPIcmd,"DATA:COPY PULSE, VOLATILE\n");

     /* Copy arb to non-volatile memory */
     CHECK(viWrite(Instrument, (ViBuf)SCPIcmd, (ViUInt32)strlen(SCPIcmd),&actual));
     strcpy(SCPIcmd, "FUNCtion:USER PULSE\n");

     /* Select the active arb waveform */
     CHECK(viWrite(Instrument, (ViBuf)SCPIcmd, (ViUInt32)strlen(SCPIcmd),&actual));
     strcpy(SCPIcmd, "FUNCtion:SHAPe SQUARE\n");

     /* Output the selected arb waveform */
     CHECK(viWrite(Instrument, (ViBuf)SCPIcmd, (ViUInt32)strlen(SCPIcmd),&actual));
     strcpy(SCPIcmd, "OUTPut:LOAD 50\n");

     /* Output termination is 50 Ohms*/
     CHECK(viWrite(Instrument, (ViBuf)SCPIcmd, (ViUInt32)strlen(SCPIcmd),&actual));
     strcpy(SCPIcmd, "FREQuency 5000;VOLTage 5\n");

     /* Output frequency is5 kHz @ 5 Vpp */
     CHECK(viWrite(Instrument, (ViBuf)SCPIcmd, (ViUInt32)strlen(SCPIcmd),&actual));
     strcpy(SCPIcmd, "OUTPut ON\n");


     /* Enable output */
     CHECK(viWrite(Instrument, (ViBuf)SCPIcmd, (ViUInt32)strlen(SCPIcmd),&actual));
     CHECK(viClose(Instrument));
     CHECK(viClose(viDefaultRM));
}
Like • Show 0 Likes0
Actions
lhornburg Sep 8, 2010 3:20 PM
Mark Correct
Correct Answer
Glad you were able to find an example. Here is another very basic one:

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

/*     sample program that enables a simple sine wave output
     with following signal characteristics

     Wave Shape: Sine
     Frequency:     1000 Hz
     Amplitude:     2 Volt Peak to Peak
     Offset:          0 Volt
     Output Impedence:     50 Ohm
     Channel1 Output: Enabled
*/

#include <visa.h>
#include <stdio.h>
#include <string.h>

void main()
{
     ViSession oRm, oMIO;
     char strResult[256] = {0};
     char noErrString[256] = {"+0,\"No error\"\n"};
     char buf[256];

     //Mention Visa connection string here.
     char instAdd[] = "TCPIP0::146.223.123.106::inst0::INSTR";

     //Open a resource manager and create a visa session for communication
     viOpenDefaultRM(&oRm);
     viOpen(oRm,instAdd,VI_NULL,VI_NULL,&oMIO);

     //Query Idendity string and report.
     viPrintf(oMIO,"*IDN?\n");
     viScanf(oMIO,"%t",&buf);

     printf("Instrument Identity String: %s \n", buf);

     //Clear and reset instrument
     viPrintf(oMIO,"*CLS\n");
     viPrintf(oMIO,"*RST\n");

     //Send commands to set the desired configuration
     viPrintf(oMIO,"FUNCTION SIN\n");
     viPrintf(oMIO,"FREQUENCY 1000\n");
     viPrintf(oMIO,"VOLT:UNIT VPP\n");
     viPrintf(oMIO,"VOLT 2\n");
     viPrintf(oMIO,"VOLT:OFFSET 0\n");
     viPrintf(oMIO,"OUTPUT:LOAD 50\n");

     //Enable output.
     viPrintf(oMIO,"OUTPUT ON\n");

     //Read Error
     viQueryf(oMIO,"SYST:ERR?\n","%t",&strResult);

     if(!(strcmp(strResult,noErrString)))
          {
               printf("Sine Wave generated without any error\n");
          }
     else
          {
               printf("Error reported: %s",strResult);
          }

     //Exit
     printf("\nPress [Enter] to exit");
     getchar();

     viClose(oRm);
     viClose(oMIO);

}
Like • Show 0 Likes0
Actions

Agilent 33220A, Visual C++ simple sine wave program ?

Outcomes

Related Content

Recommended Content