ADLINK PCM-9112+ - Manual (Page 52)

44 • C/C++ Library
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. _9112_Initial().
All functions in the PCI-9112 driver uses 9112 as
{hardware_model}
In order to recognize the differences between 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_9112_Initial().
5.2.2 Data Types
We have defined some data type in Pci_9112.h (DOS) and Acl_pci.h
(Windows 95). These data types are used by NuDAQ Cards’ library. We
suggest 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