Research And Design Of Bluetooth Protocol Stack Based On UCOS-Ⅱ

Short-distance wireless communication technology has brought great convenience to people's lives and industrial development. Many electronic devices and embedded devices can get rid off the shackles of cable by this technology.Bluetooth is such a close range wireless communication technology and has a strong development momentum.It is based on the 2.4GHz global ISM band of the global short-range wireless communication technology,using frequency hopping and spread spectrum technology to achive the point and multipoint data transmission services. The bluetooth technology is an instant communication technology.It doesn't ask for fixed infrastructure,easy installation and setup,and also it can be implemented without operating system support.Thus,the present short-range Bluetooth technology as an instead of the cablealternative scheme has been widely used in many areas, especially in consumer electronics and embedded devices.At present,the Bluetooth protocol has been used in windows, Linux, uCLinux and some mobile phone operating system,such as s40,s60 and windows mobile. But these systems are all used in complex hardware environment and operating system.Jean J.Labrosse writed the uCOS to address this problem.uCOS is one of the low-end hardware environment for the birth of an embedded system.It can achieved many features of the operating system in a low-level hardware environment,such as multi-tasking,real-time,inter-process communication and so on.Currently uCOS has been used in SOC environment or wired communication environment.But it does not support the bluetooth protocol.In support of the bluetooth protocol,it will further promote the development of intelligent controllers.Based on this problem,the bluetooth protocol be introduced to the uCOS-Ⅱ,witch is the second version of uCOS kernel.The protocol stack has been designed from HCI,this will give more flexible to the reallize of the upper layer. SDP and L2CAP also be designed in the uCOS.The experimental results have demonstrated the protocol has successfully connected with other device.