Thread: Visatype error, unknown type name ViUInt64

Code:

#include <stdio.h>
#include <visa.h>
int main () {
ViSessiondefaultRM,vi;
char buf [256] ={0};

viOpenDefaultRM(&defaultRM);
viOpen (defaultRM, " USB0::0x0957::0x0607::MY47021232::INSTR",VI_NULL,VI_NULL, &vi);
/* Initialize device*/
viPrintf (vi,"*RST\n");
/* Send an *IDN?string to the device */
viPrintf (vi,"*IDN?\n");
/* Read results */
viScanf (vi,"%t", &buf);
/* Print results */
printf("Instrument identification string: %s\n", buf);
/* Close session */
viClose (vi);
viClose (defaultRM);
}
 

  //Using Code Blockers 17.12
//Win10 64bit
//GNU GCC Complier(x64)

//when I run above code, the Visatype.h code opens up instead, and seems to point to the bit of code below in VisaType.

 
//typedef ViUInt64 _VI_PTR Vi PUInt64


//Error: unknown type name ViUInt64

Using Code Blockers

Are ya?

VisaType

Don't tell us anything about it.
Don't give a website link or anything.
Everybody knows what VisaType is, of course.
I use it every day!

Anyway, it's obviously an error in the header code. Or else you're supposed to include something else before visa.h, although that's not usually the case. Another possibility is that you're supposed to define some macro(s) to indicate what types to use.

Try downloading the thing again and if it still doesn't work, RTFM.

in visatype.h :

Code:

#if defined(_VI_INT64_UINT64_DEFINED)   
  typedef ViUInt64    _VI_PTR ViPUInt64;
  typedef ViUInt64    _VI_PTR ViAUInt64;
  typedef ViInt64     _VI_PTR ViPInt64;
  typedef ViInt64     _VI_PTR ViAInt64;
#endif

I really don't understand! I like to struggle and figure it out, but now I have spent at least 3days trying to get this code to work. I can communicate with my DMM using LabVIEW, Visual Studio and Pycharm. But not able make code blockers IDE work with this code. Can somebody explain to me what I am missing? Everytime I run the code it always ignores my code and error to visatype. If I disable Visa.h in my code it runs error to the ViSession default RM, VI;. Am I missing a macro that defines parts of my code? Does my code look like it should work. My visatype is exactly like below.

#if defined(_VI_INT64_UINT64_DEFINED)
typedef ViUInt64 _VI_PTR ViPUInt64;
typedef ViUInt64 _VI_PTR ViAUInt64;
typedef ViInt64 _VI_PTR ViPInt64;
typedef ViInt64 _VI_PTR ViAInt64;
#endif

Did you try defining "_VI_INT64_UINT64_DEFINED"?

Tim S.

Looks like you might have a Compiler issue; as in the compiler you are using might not be compatible with what you are trying to build!

I suggest RTFM and seeing what compilers are supported!

Tim S.

Looks like LibreVISA should work with GCC under Debian. Not sure about 64 bit Windows OS Mingw GCC.

Tim S.

You did built LibreVISA with the same Compiler you are trying to build the client code, correct?

Edit: The library looks like no progress in about 6 years.

Tim S.