Embedded Linux Application Technology Research In Wireless Communications In The Metered

China is now increasingly clear view of the difficult parking, road congestion and other problems. Aiming at these phenomenon, I put forward a parking meter sytem solution that is a part of a smart parking system .Smart parking system is made up by parking information terminals, parking handsets, parking meters and information center.Parking meter system is the communications hinge of the whole smart parking system, responsible for transmiting data between the various modules and parking status shows and billing. Paring meter system is designed as a embedded system. Its processor is Samsung S3C2440 based on ARM9 processor architecture and its operating system is the open-source embedded Linux system.Parking meter system using stone's throw RF wireless communications with handset, and using GPRS wireless or Ethernet communications with information center. Based on the understanding of the smart parking system, workflow, the parking meter system structure, I build the software platform based on embedded Linux operating system, including cross-compiler tool chain establishment, U-boot transplantation, Linux kernel transplantation, file systems establishment ,embedded database sqlite3 transplant and building of GDB-Server remote debuging environment. Completed RF wireless communications design between parking meter system and the handset, and GPRS wireless communications design between parking meter system and information center. solved how to communicate between one host machine and more slave machines in the RF wireless communications and how to ensure safety and reliability in the GPRS wireless communications. Transplant the embedded web server BOA. Designed QT GUI interface and information center communications software based on GPRS and Ethernet communications. The parking meter system is a rational design and its software capabilities are available to the design requirements.