SIP协议栈在嵌入式系统BF561上的实现

Implementation of SIP Protocol Stack on Embedded System BF561

采用了一种全新的可视电话解决方案一基于BF561的SIP(Session Initiation Proto-col)可视电话终端。该终端采用的硬件平台是ADI-Blackfin561,软件平台是嵌入式uCLinux操作系统+PJSIP协议栈,分析了PJSIP协议栈的体系结构,并针对嵌入式系统软硬件的特点,对PJSIP进行配置和修改,最终移植到嵌入式系统中。实现一种软硬件集成的、基于网络传输的、功耗低的嵌入式可视电话终端,通过联机调试验证了终端的可行性。

A new solution is put forward that design video telephone based on PJSIP Stack of BF561.By the the hardware platform of endpoint is ADI Blackfin561.uClinux embedded operating system and PJSIP stack are chosen as software platform.The architecture of PJSIP is discussed,aiming at the characteristic of embedded software and hardware,it should be modified and configured,then ported into the embedded system.The success of improving the insufficient above is proved by the program testing.The video telephone endpoint is achieved which integrates software and hardware,transmit data through networks,has lower power consumption.By means of online test,this endpoint works smoothly.