User`s manual

36 C/C++ Libraries
72XX Series
User’s Manual
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 Win-
dows 95 library, a capital W is placed in the beginning of each func-
tion 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
Table 5-1: Data Types