User manual

USB DrDAQ Programmer's Guide 39

3.6

Programming support

3.6.1

Introduction

We supply examples for the following programming languages:

C and C++

Excel

LabVIEW

3.6.2

C and C++

To compile the program, create a new project for an Application containing the

following files:

usbdrdaqcon.c

and

usbdrdaq.lib (Microsoft Visual C 32-bit applications).

usbdrdaqbc.lib (Borland 32-bit applications)

The following files must be in the compilation directory:

usbdrdaqapi.h

picostatus.h

The following file must be in the same directory as the executable, or in the search

path.

usbdrdaq.dll

C++

C++ programs can access all versions of the driver. If ubsdrdaqapi.h is included in

a C++ program, the PREF1 macro expands to extern "C": this disables name-

decoration, and enables C++ routines to make calls to the driver routines using C

headers.

3.6.3

Excel

The easiest way to transfer data to Excel is to use PicoLog. However, you can also

write an Excel macro which calls ubsdrdaq.dll to read in a set of data values. The

Excel macro language is similar to Visual Basic.

The example ubsdrdaq.xls reads in 20 values from Channels 1 and 2, one per

second, and assigns them to cells A1..B20.

Use Excel Version 7 or higher.

Note that it is usually necessary to copy the DLL file to the \windows\system

directory.