Adlink PCI-7224 Bedienungsanleitung PDF herunterladen (Seite 42)

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C/C++ Libraries

5.2 Programming Guide

5.2.1 Naming Convention

The functions of the NuDAQ PCI cards or NuIPC CompactPCI cards’

software driver use full-names to represent the functions' real meaning. The

naming convention rules are:

In DOS Environment:

_{hardware_model}_{action_name}.

e.g.

_7248_Initial()

All functions in PCI-7248 driver are with 7248 as {hardware_model}. But they

can be used by PCI-7248, PCI-7224 and cPCI-7248.

In order to recognize the difference between DOS library and Windows 95

library, a capital

is placed in the beginning of each function name of the

Windows 95 DLL driver, e.g.

W_7248_Initial()

5.2.2 Data Types

We defined some data type in Pci_7248.h (DOS) and Acl_pci.h (Windows

95). These data types are used by NuDAQ Cards’ library. ADLINK

Technology Inc. suggests these data types to be used in the application

programs. The following table gives the data type names and their range.

Type Name Description Range

U8 8-bit ASCII character 0 to 255

I16 16-bit signed integer -32768 to 32767

U16 16-bit unsigned integer 0 to 65535

I32 32-bit signed integer -2147483648 to 2147483647

U32 32-bit single-precision

floating-point

0 to 4294967295

F32 32-bit single-precision

floating-point

-3.402823E38 to 3.402823E38

F64 64-bit double-precision

floating-point

-1.797683134862315E308 to

1.797683134862315E309

Boolean Boolean logic value TRUE, FALSE

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Adlink PCI-7224 Bedienungsanleitung Seite 42