NuDAQ PCI-8554, User Manual

Page: 49 / 62

C/C++ Libraries
•
41
5.2 Programming Guide
5.2.1 Naming Convention
The functions of the NuDAQ PCI cards or NuIPC CompactPCI cards ’
software driver are using full-names to represent the functions' real
meaning. The naming convention rules are:
In DOS Environment:
_{hardware_model}_{action_name}. e.g. _8554_Initial() .
In order to recognize the difference between DOS library and
Windows 95 library, a capital "
W " is put on the head of each function
name of the Windows 95 DLL driver. e.g. W_8554_Initial() .
5.2.2 Data Types
We defined some data type in Pci_8554.h (DOS) and Acl_pci.h
(Windows 95). These data types are used by NuDAQ Cards
’ library.
We suggest you to use these data types in your applicati on
programs. The following table shows 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