Chapter 3 Implementation of
Software
3-1 Overview
3-1-1 Software Overview
Embedded Linux KernelOS Layer
Driver Layer
Wireless Card
Driver
PCM-7130 Drivers
USB Camera
Driver
Library Layer
PHP/MySQLSDL
Video4Linux
API
DSS/Perl
Application
Layer
Reading Image HTTP Server
PHP
Applications
Images Auto
Recording
Motion
Detection
WiFi Media
Streaming
Remote
Monitor
Two-tier
Identification
JPEG
Remote
Management
Notification to
Cell Phone
Hardware
Layer
RFID Module
M318B
Webcam
KeyPad
Keypad
wireless
D-Link
DWL-650
USB Flash
Disk
Figure 14. The Overview of Firmware
Figure 14 shows the overview of firmware, which has five layers. The
firmware overview, excluded the hardware layer, would be the software
overview, and the software overview has four layers: are driver layer; OS
layer; library layer and application layer.
Bottom layer is the driver layer which has USB camera driver, wireless
card driver and PCM-7130 drivers that would be discussed in 3-2-3. The OS
layer is embedded Linux kernel which would be discussed in 3-2-1. The
library layer provides some API for applications using, it could reduce the
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