ADLINK cPCI-8554/R - Manual (Page 50)

40 • C/C++ Libraries
5.2 Programming Guide
5.2.1 Naming Convention
The functions of the NuDAQ PCI or NuIPC CompactPCI card software
drivers uses 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 the DOS library and Windows
95 library, a capital "W" is placed at the start of each function name for
Windows 95 DLL drivers. e.g. W_8554_Initial().
5.2.2 Data Types
We have defined some data types in the Pci_8554.h (DOS) and Acl_pci.h
(Windows 95) header files. These data types are used by the NuDAQ
Cards’ library. We recommend you use these data types in your
application 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
Table 9. Data types and their ranges