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| 基于Cortex-M3的车载无线视频服务器串口扩展设计 | |
| 引用本文： | 祁莉娜,徐良平,邵文军.基于Cortex-M3的车载无线视频服务器串口扩展设计[J].电视技术,2012,36(1):44-47. |
| 作者姓名： | 祁莉娜 徐良平 邵文军 |
| 作者单位： | 1. 武汉邮电科学研究院,湖北武汉,430074 2. 武汉虹信通信技术有限责任公司,湖北武汉,430074 3. 华中科技大学,湖北武汉,430074 |
| 基金项目： | 电子信息产业发展基金项目 |
| 摘 要： | 车载无线视频服务器系统中主芯片DM365通过串口和多个外部模块进行通信,而DM365只有两个串口.采用TI公司基于Cortex-M3内核的微控制器LM3S1538设计一个对DM365串口进行扩展的嵌入式系统,利用 μC/OS-Ⅱ嵌入式实时操作系统对DM365与系统外部各个模块之间的通信进行管理.介绍了串口扩展的硬件设计方案,详细地阐述了软件设计方法,包括μC/OS-Ⅱ操作系统的移植和应用程序的设计.本设计可以稳定地工作在车载无线视频服务器系统中,很好地解决了该系统中串口不足的问题. |
| 关 键 词： | 串口扩展 μC/OS-Ⅱ LM3S1538 嵌入式 |
Design of Serial Port Expansion Based on Cortex-M3 in On-board Wireless Video Server |
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| QI Lina,XU Liangping,SHAO Wenjun.Design of Serial Port Expansion Based on Cortex-M3 in On-board Wireless Video Server[J].Tv Engineering,2012,36(1):44-47. | |
| Authors: | QI Lina XU Liangping SHAO Wenjun |
| Affiliation: | 1.Wuhan Research Institute of Posts and Telecommunications,Wuhan 430074,China; 2.Wuhan Hongxin Telecommunication Technologies Co.Ltd.,Wuhan 430074,China; 3.Huazhong University of Science and Technology,Wuhan 430074,China) |
| Abstract: | In the on-board wireless video server system,the core MCU DM365 communicates with several other modules via serial port,but DM365 has only two serial ports.An embedded system for DM365 serial port expansion is designed by using the Cortex-M3 based MCU LM3S1538 of TI.The real-time embedded operating system μC/OS-Ⅱ is used to manage the communications between DM365 and the peripheral modules.In this paper,the serial port expansion circuit is introduced,and the software design including the μC/OS-Ⅱ transplantation and the application procedure design is recommended in detail.The design can work stably in the on-board wireless video server,it is a good solution to the lack of serial ports in this system. |
| Keywords: | serial port expansion μC/OS-Ⅱ LM3S1538 embedded |
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