The Design And Implementation Of Embedded Wireless IP Camera

During recent years, as embedded computer system developes rapidly, it has been applied everywhere in people's life and work, in the meanwhile, digital video surveillance and multimedia technology on embedded computer system also has gained rapid development speed and widespread application. Since video surveillance has entered a new time when it bases on embedded computer system and networks, this designe plans to develop an embedded wireless IP Camera basing on S3C2410A, which is to be used in video surveillance.This design has made a print curcuit board for IP Camera basing on S3C2410A, which includes 4-ch DC-DC power supplier, 4-ch USB host, 1-ch USB device, 3-ch UART, JTAG ICE, system bus drivers, system reset curcuit and so on. Also, the board supplies interfaces for 10/100M ethernet, PCMCIA/CF, IDE, SD/MMC, Audio, ADC, touch screen and LCD. These all make a good hardware support for the IP Camera and give various choice for the implementation. With the purpose of the print circuit board's stabilization, it is designed with four board layers.A BootLoader for S3C2410A platform has been developped, with a serial of necessary functions, which has well met the demands of IP Camera. The Linux kernel of version 2.4.18 has also been ported to IP Camera, which supplies many APIs for the application. The drivers ported with kernel make it easier to drive the hardwares of IP Camera in user programs.An application software has also been developped for IP Camera, which makes its video capture function to become real beings. The application mainly bases on the technology of V4L, socket communication and 802.11b wireless LAN protocol. User with a client GUI software can then get a view of the video pictures from IP Camera through networks. The interface of PCMCIA/CF, through which S3C2410 communicates with wirelss LAN card, is a key and hard part of the design. The detail of video capture,MPEG-4 and encryption/decryption are discussed at the end of this thesis.At last, this thesis gives out the result of test for IP Camera and finds out room for further development, meanwhile, it suggests a plan for it too. Following standard development process, the embeded wireless IP Camera developped in this design has some theoretical and practical value according to the present goal.