Phytec FireWire-CAM-011H, Руководство пользователя

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The Software Concept
© PHYTEC Messtechnik GmbH 2006 L-680e_1
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4 The Software Concept
One of the most interesting properties of the PHYTEC FireWire-CAM
in terms of software is that it can run with standardized interfaces.
This makes the FireWire-CAM-001/002 compatible to the existing
Windows driver models.
4.1 Layers Standards of the FireWire-CAM Series
Hardware / Protocol
At the hardware layer the standard IEEE 1394 (FireWire) is used.
Since IEEE 1394 defines a data bus certain protocols are required that
establish the data exchange between the devices.
With
DCAM
(described in the specification DCAM V1.31) The
PHYTEC cameras use a protocol that defines the transmission of
uncompressed image data streams as well as the camera parameter
settings (e.g. exposure time).
Driver
The protocol is realized on the processor end with the help of a WDM
Stream Class driver. WDM stands for „Windows Driver Model“. For
mice, keyboards, drives etc. this is standard for a long time. For
automated image processing, practical application with support of the
FireWire interface with Windows 2000 or better or DirectX 8 is
recommended.
Software Interface
Application software should ideally access the operating system
functions and not the hardware itself. Windows offers
DirectX
for
image and audio processing. Since the PHYTEC FireWire-CAM only
delivers image data streams, only the portion
DirectShow
is required.
DirectShow automatically recognizes the WDM Stream Class driver.
Therefore when using the FireWire-CAM no additional software is
required (excluding the actual application software).