基于LVDS高速串行总线通信技术的研究
发布时间：2019-05-26 21:39
【摘要】：根据用户要求，需要将上位机中在执行操作前20ms实时控制周期内将控制系统期望得到的原始数据下传至下位机测试系统；测试环境中，上位机和下位机测试台间距需有150～200m，两者间采用长线数据传输。 传统的通信方式：如RS-422总线、CAN总线、千兆以太网接口、1553总线等接口均不能满足要求。为此,本论文提出一种基于LVDS高速串行总线通信技术来解决该问题。LVDS接口是一种采用极低的电压摆幅变速差动传输数据的接口技术，该技术符合系统对数据长距离传输的实时性，高速率，高可靠性的要求；此项技术也具有广阔的应用前景。 本论文完成基于LVDS高速串行总线的硬件印制件的设计工作，，结合VxWorks实时操作系统实现了相关的驱动程序，设计出通讯距离可达到200m，通信速率不低于20Mbps，通信协议和通信速率可通过软件更改通信专用印制件。并验证该板卡能够满足实际使用要求。
[Abstract]:According to the requirements of the user, it is necessary to transmit the expected original data of the control system to the lower computer test system during the 20ms real-time control cycle before the operation. In the test environment, the distance between the upper computer and the lower computer should be 150 m / 200 m, and the long line data transmission is adopted between them. The traditional communication methods, such as RS-422 bus, CAN bus, Gigabit Ethernet interface, 1553 bus and so on, can not meet the requirements. Therefore, this paper proposes a high speed serial bus communication technology based on LVDS to solve this problem. LVDs interface is an interface technology which adopts very low voltage swing variable speed differential transmission data. This technology meets the requirements of real-time, high speed and high reliability of long distance data transmission. This technology also has a broad application prospect. In this paper, the design of hardware printed parts based on LVDS high-speed serial bus is completed, and the related driver is realized with VxWorks real-time operating system. The communication distance can reach 200m and the communication rate is not less than 20Mbps. The communication protocol and communication rate can be changed by software. And verify that the card can meet the actual requirements.
【学位授予单位】：西安电子科技大学
【学位级别】：硕士
【学位授予年份】：2012
【分类号】：TP336;TN914
本文编号：2485655
[Abstract]:According to the requirements of the user, it is necessary to transmit the expected original data of the control system to the lower computer test system during the 20ms real-time control cycle before the operation. In the test environment, the distance between the upper computer and the lower computer should be 150 m / 200 m, and the long line data transmission is adopted between them. The traditional communication methods, such as RS-422 bus, CAN bus, Gigabit Ethernet interface, 1553 bus and so on, can not meet the requirements. Therefore, this paper proposes a high speed serial bus communication technology based on LVDS to solve this problem. LVDs interface is an interface technology which adopts very low voltage swing variable speed differential transmission data. This technology meets the requirements of real-time, high speed and high reliability of long distance data transmission. This technology also has a broad application prospect. In this paper, the design of hardware printed parts based on LVDS high-speed serial bus is completed, and the related driver is realized with VxWorks real-time operating system. The communication distance can reach 200m and the communication rate is not less than 20Mbps. The communication protocol and communication rate can be changed by software. And verify that the card can meet the actual requirements.
【学位授予单位】：西安电子科技大学
【学位级别】：硕士
【学位授予年份】：2012
【分类号】：TP336;TN914
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本文编号：2485655
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