Agilent 81110A Pulse Generator and GPIB control - code problem.

[konx]

Hi,

I'm really new of GPIB programming and I'm experiencing some problems in communicating with an Agilent 81110A Pulse Generator.

Preliminary:

- I'm using a NI USB-HS. This board is recognized

- I've downloaded some GPIB examples and I can create a Visual C++ project that works (so I can include the Gpib-32.obj, the header file is recognized, etc...) and I can build my program.

This to say that I don't think that the problem is the communication.

Then, I'm trying to control the Pulse Generator.

This is what I wrote until now:

int  Dev;                     // Device handle
char ReadBuffer[MYSIZE + 1];  // Read data buffer
char ErrorMnemonic[21][5] = {"EDVR", "ECIC", "ENOL", "EADR", "EARG",
                             "ESAC", "EABO", "ENEB", "EDMA", "",
                             "EOIP", "ECAP", "EFSO", "", "EBUS",
                             "ESTB", "ESRQ", "", "", "", "ETAB"};
    //Get device handle
    Dev = ibdev (BDINDEX, PRIMARY_ADDR_OF_DMM, NO_SECONDARY_ADDR, TIMEOUT, EOTMODE, EOSMODE);
    if (ibsta & ERR)
    {
       GPIBCleanup(Dev, "Unable to open device"); //This is a function to get the error I've find in the examples. It is included in my code
       errorLabel1->setText("Unable to open device"); //This is to display the error on the GUI (using QT library)
    }

    //Clear the device
    ibclr (Dev);
    if (ibsta & ERR)
    {
       GPIBCleanup(Dev, "Unable to clear device");
       errorLabel2->setText("Unable to clear device");
    }

    //Identification write
    ibwrt (Dev, "*IDN?", 5L);
    if (ibsta & ERR)
    {
       GPIBCleanup(Dev, "Unable to write to device");
       errorLabel3->setText("Unable to write the device");
    }

    //Read identification code
    ibrd (Dev, ReadBuffer, MYSIZE);
    if (ibsta & ERR)
    {
       GPIBCleanup(Dev, "Unable to read data from device");
       errorLabel4->setText("Unable to read data from device");
    } else {
        ReadBuffer[ibcntl] = '\0';
        errorLabel4->setText(ReadBuffer);
    }

    char *channel = "OUTP1 ON";
    ibwrt (Dev, &channel, strlen(channel)); 

The thing that doesn't work is the last command, where I try to turn On the channel one of the device. So, for example, I correctly get the string that describe the Agilent Pulse generator.

A couple of things I've noticed:

- in the examples I have they don't use the Pointer data-type.

- I don't turn off the device at the end, but this shouldn't be a problem.

Thanks in advance for any answer you can give me

Francesco.

[ninlmartijn]

Dear Fransesco,

thank you so much for your post on our webforum. I'm no Visual C++ expert, so I can't help you with this programming issue. NI support goes to the level that the GPIB card communicates correctly; we can use MAX to test this. For the right commands / handling you should contact the manufacturer.

I noticed an instrument driver which can make it easier to implement the communication with your 81110A device, please find the download page under this link.

I hope this helps you further,

Best regards,

[Albert.Geven]

It should be ":OUTP1 :STAT ON"

and you may add carriage return linefeed after that.

[성지]

Hi, I'm using Keithley 4200 and Agilent 81110a pulse generator,

I also need to take DC sweep measurement and control pulse generator by GPIB

But I'm totally begginner with the instruments and their program.

Could you shall your program code with me????? If one day I could succedd editng your code to mine, I will also shall with you.

My email is jinshengzhi86@hotmail.com

Please help me~~~~~~~~~~

Thank you.

[nyc_(is_out_of_here)]

---

@성지 wrote:

Hi, I'm using Keithley 4200 and Agilent 81110a pulse generator,

I also need to take DC sweep measurement and control pulse generator by GPIB

But I'm totally begginner with the instruments and their program.

Could you shall your program code with me????? If one day I could succedd editng your code to mine, I will also shall with you.

My email is jinshengzhi86@hotmail.com

Please help me~~~~~~~~~~

Thank you.

---

No need to spam this message board with asking for help.