Software Design Of Vehicle Bluetooth Wireless Hand-free Based On μC/OS-Ⅱ

Bluetooth has become a kind of unity technical standards in the world, when wireless interconnectivity is doing between portable device and peripherals of computer. Bluetooth allows that users can exchange data and synchronize files among many devices. Simple data exchange is that information is delivered from mobile phone to PDA and so on. Therefore, these operations achived as long as within the scope of two device each other .Nowadays, with the development of the automotive technology, the safety and convenience of automotive are becoming more and more concerned sothat the bluetooth hands-free system has been widely used in the automotive electronics field.But many bluetooth hands-free terminals interact human by on-board display, driver has to make sure the caller’s information on the display, which will lead to traffic accidents.In order to solve this problem embedded bluetooth hands-free system software design was adopted in this paper,μC/OS-II real-time operating system based ARM was embedded in the system.This systerm can read information of name and telephone numbers , dial the number and answer or hang up the call. Finally,this systerm can read information of caller.This systerm use operating systemμC/OS-II that is opend soure real-time operating system and open compiled with ANSI C .The whole process was divided into many tasks .The system would give different priority degrees to different tasks according to their importance. In order to enhance the matching speed between phonebook and call’s information, this systerm use KMP Algorithm. Experimental Results shows,this systerm not only achieve the goal, but also have a better reliability, stability .