摘要
为了降低嵌入式可视电话产品的成本,拓展其应用范围,提出了基于ARM7的可视电话系统设计方法。在分析可视电话机功能特点的基础上,通过对核心功能部件选型,确立了可视电话机的硬件逻辑结构,给出了系统软件模块结构以及软件设计流程。最后在实时操作系统C/OS-Ⅱ之上实现了终端原型。ARM7、NW901、RTL8019AS等部件的选择保证了较低的硬件成本,TCP/IP协议栈在C/OS-Ⅱ上移植保证了可用性和较低的软件成本。原型系统测试结果表明,该可视电话机性能卓越,达到了预期的目的。
In view of the high cost of video phone with a too narrow application area in the embedded market, analyzing the function features of video phone, a video phone system based on ARM7 is proposed.At last the system terminal prototype is implemented on the RTOS of C/OS-Ⅱ.The selection of ARM7, NW901, and RTL8019AS components kept the low hardware cost of system.The availability of system and the software low cost can also benefit from the TCP/IP protocols stack over the C/OS-Ⅱ.The results obtained from prototype performance analysis show that the video phone has a lower cost and higher performance, which has achieved the desired purpose.
出处
《计算机工程与设计》
CSCD
北大核心
2009年第23期5386-5388,5403,共4页
Computer Engineering and Design
