National Instruments NI-488.2 ユーザーズマニュアル

This section describes items you should include in your application and 
provides general program steps with an NI-488.2 example. 

Include the following items in your application:

•

Header files—In a C application, include the header files 

windows.h

 

and 

decl-32.h

. The standard Windows header file, 

windows.h

, 

contains definitions used by 

decl-32.h

, and 

decl-32.h

 contains 

prototypes for the NI-488.2 calls and constants that you can use in your 
application. 

•

Error checking—Check for errors after each NI-488.2 call. 

•

Error handling—Declare and define a function to handle NI-488.2 
errors. This function takes the device offline and closes the application. 
If the function is declared as:

void gpiberr (char * msg); /*function prototype*/

Then your application invokes it as follows:

if (ibsta & ERR) {

gpiberr("NI-488.2 error");

}

The following steps show you how to use the multi-device NI-488.2 calls 
in your application. The NI-488.2 software includes the source code for an 
example written in C, 

4882query.c

, and the source code for the example 

written to use direct entry to access the 

gpib-32.dll

, 

dll4882query.c

. 

The NI-488.2 software also includes a sample program written in Visual 
Basic, 

query4882.frm

. 

Use 

SendIFC

 to initialize the bus and the GPIB interface so that the GPIB 

interface is Controller-In-Charge (CIC). The only argument of 

SendIFC

 is 

the GPIB interface number, typically 0 for 

GPIB0

.