National Instruments IEEE 1394 Manual do Utilizador descarregar pdf (Página 10)

Chapter 1 Introduction to NI-IMAQ for IEEE 1394 Cameras

Figure 1-1. NI-IMAQ for IEEE 1394 Cameras Architecture

The architecture uses a hardware abstraction layer, which separates

software API capabilities, such as general acquisition and control

functions, from hardware-specific information. This layer lets you run your

application on different operating systems and use updated versions of the

driver without having to recompile your application.

NI-IMAQ for IEEE 1394 Cameras Libraries

The NI-IMAQ for IEEE 1394 Cameras function libraries are dynamic link

libraries (DLLs), which means that NI-IMAQ for IEEE 1394 Cameras

routines are not linked into the executable files of applications. Only the

information about the NI-IMAQ for IEEE 1394 Cameras routines in the

NI-IMAQ for IEEE 1394 Cameras import libraries is stored in the

executable files.

Import libraries contain information about their DLL-exported functions.

They indicate the presence and location of the DLL routines. Depending

on the development tools you use, you can give the DLL routines

LabVIEW

LabWindows/CVI

Visual C++

IMAQ1394.DLL

Application Level

NIPALK.SYS

OCHI1394.SYS

1394BUS.SYS

Windows Kernel

NIPALP.DLL

TNF.DLL

LabVIEW RT Kernel

IMAQ1394K.DLL

Kernel Level

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National Instruments IEEE 1394 Manual do Utilizador Página 10