The Design And Development Of Embedded Video Monitoring Terminal Driver

With the continuous development of embedded technology and network technology, embedded video service has been more widely used, such as a variety of business video surveillance, video conferencing. Meanwhile, with the continuous improvement of people’s awareness of security, video surveillance terminal as an important part of the field of security, has been paid more and more attention, it has great significance for the study of video surveillance systems.In the embedded operating systems, the Linux operating system is open source, small core and has good performance. And Linux2.6.32 contains a number of new features that make it an excellent and suitable operating system for embedded system. The embedded Linux operating system will bring large application prospects.In this paper, through analysis of the embedded video surveillance equipment, combined with the needs, the hardware select the TMS320DM365 chip as the main chip, software development kit select the newest DVSDK4.02, contains the kernel Linux2.6.32, UBOOT, and drivers.First, according to the system’s needs, this paper build up the newest software development environment, build the cross-compile environment, implements the UBOOT based on the actual hardware, modify and configure the Linux kernel, and make boot image according to the business need.Second, this paper analysises and designs for the drivers of each module in embedded video surveillance terminal. And it focus on the completion of video module driver based on TVP5151 chip, LCD display driver, audio module driver based on AIC3101 chip, NAND FLASH driver, etc. And modify the key module driver and GPIO driver according to the business need.Last, after the Linux kernel, device drivers completed, the UBOOT and kernel flash into the video surveillance terminal, and it work well. The surveillance terminal can capture, display, store and transmission video under 3G or WiFi, it also can capture audio and playback, etc. It meet the basic requirements of embedded video surveillance terminal users.