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C/C++ Library •37
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. _9111_Initial().
All functions in PCI-9111 driver are with 9111 as {hardware_model}. But
they can be used by PCI-9111DG, PCI-9111HR.
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_9111_Initial().
5.2.2 Data Types
We defined some data type in Pci_9111.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 application programs. The following table
shows the data type names and their range.
Type Name Description Range
U8 8-bits ASCII character 0 to 255
I16 16-bits signed integer -32768 to 32767
U16 16-bits unsigned integer 0 to 65535
I32 32-bits signed integer -2147483648 to 2147483647
U32 32-bits unsigned integer 0 to 4294967295
F32 32-bits single-precision
floating-point
-3.402823E38 to 3.402823E38
F64 64-bits double-
precision
floating-point
-1.797683134862315E308 to
1.797683134862315E309
Boolean Boolean logic value TRUE, FALSE