基于FPGA的iNET网络电台接口扩展技术研究

发布时间：2018-06-29 11:46

本文选题：FPGA + iNET网络电台　；参考：《成都理工大学》2013年硕士论文

【摘要】：由于在西藏旅游危机预防与应急救援项目中采用的是美国MDS公司的区域性专网（iNET）产品建立一个无线信息网络系统，用来解决监测点至3G信号覆盖较好处的通信问题。但是所采用的MDS iNET300系列产品所能够搭载的接口不能满足实际的需求，所以需要对现有的iNET300的接口进行扩展，基于此目的将本文的研究课题定为基于FPGA的网络接口扩展设计。通过对国内外接口转换研究的调研，由于使用背景与需求的差异，现有的接口转换和扩展产品以及接口转换和扩展方面的研究无法满足本课题的要求，基于此目的展开了本课题的研究方向，不同的通信设备接口往往采用不同的通信协议，通信接口的不同，阻碍了数据的传输，解决这个问题的一个重要方法就是协议转换，论文提出了一种基于FPGA的网络接口扩展设计。近年来随着FPGA性能的提高和片上可编程系统(System On Programmable Chip SOPC)技术的不断发展，SOPC为数据的转换提供了一条新的思路，本文的研究内容就是结合NiosII软核处理器，设计一款可裁剪的，通用的，易移植的，iNET网络电台接口扩展模块。论文对多串口和以太网转换系统的体系架构及关键技术设计进行了深入的研究，在本文的引言部分，介绍了现有不同接口的转换和扩展方式，调研了国内外的研究现状和新的发展趋势，确立了本课题的研究内容，并针对现有研究提出了本文的创新点。对在本文的主体部分，首先对基于FPGA的iNET网络接口扩展设计的功能和技术问题进行了分析，介绍了本文所涉及的两个接口协议RS232和TCP/IP各自的特性，将两种协议进行了分析和比较，并对硬件系统做了介绍，包括硬件外设板和开发板介绍以及硬件平台的搭建和数据链路通路流向。然后分两章介绍了网络接口扩展设计的软件系统，第三章对软件编程相关的应用及理论进行了介绍，包括对软件开发环境Quartus II、ModelSim、SOPC Builder、Eclipse进行了介绍，制定了基于MODBUS—RTU的多串口转换模块的通信协议，，介绍了自适应算法是相关理论，并在其基础上探讨并研究了多串口模块自适应带宽的实现，最后阐述了网络接口扩展的软件设计架构，将整个设计分为两个模块来实现，分别为com_fifo多串口模块和nios_LAN_UART串口以太网转换模块，为接下来阐述基于SOPC的网络接口扩展设计的实现提供了理论基础。第四章是具体的网络接口扩展设计软件实现，对串口以太网转换模块的数据转换方式进行了介绍，然后从实现各接口的专有芯片ENC28J60, MAX232的功能和控制的软核搭建开始，为软核配置CPU、SDRAM、EPCS、JATG等外围电路，生成软核后，在其基础上结合以太网和串口各自的通信协议TCP/IP和RS232实现了NiosII软核处理器下的嵌入式串口以太网接口转换模块的开发。为了实现多串口和以太网的转换，对多串口模块的实现进行了研究，整个模块分为了主串口发送模块和主串口接收模块，并结合自适应算法，实现了自适应带宽调节的多串口同单串口之间数据的转换。最后对网络扩展设计进行了模块和系统两方面的测试，验证了本课题的功能及实现的可能性。
[Abstract]:In the Tibet tourism crisis prevention and emergency rescue project, a wireless information network system is established by the American MDS company's regional special network (iNET) product, which is used to solve the better communication problems of monitoring point to 3G signal coverage. But the interface that the MDS iNET300 series products can carry can not meet the actual situation. Therefore, it is necessary to extend the existing iNET300 interface. Based on this purpose, the research topic of this paper is defined as the design of network interface expansion based on FPGA.
Through the research on interface conversion research at home and abroad, due to the difference of background and demand, the research of existing interface conversion and extended products and interface conversion and extension can not meet the requirements of this subject. Based on this purpose, the research direction of this topic is carried out. Different communication equipment interfaces often adopt different communication associations. The difference of communication interface hinders the transmission of data. One of the most important methods to solve this problem is the protocol conversion. This paper proposes a network interface extension design based on FPGA. In recent years, with the improvement of FPGA performance and the continuous development of the System On Programmable Chip SOPC technology, SOPC is the data The transformation provides a new idea. The research content of this paper is to design a tailor, general, easy to transplant, iNET network radio interface extension module with the NiosII soft core processor.
This paper makes a thorough research on the architecture and key technology design of the multi serial port and Ethernet conversion system. In the introduction part of this paper, it introduces the transformation and expansion of the existing different interfaces, investigates the research status and the new trend of development at home and abroad, establishes the research content of this topic, and puts forward the existing research. In the main part of this article, the function and technical problems of the FPGA based iNET network interface extension design are analyzed, and the characteristics of the two interface protocols, RS232 and TCP/IP, are introduced. The two protocols are analyzed and compared, and the hardware system is introduced, including the hardware. The introduction of board and development board, the construction of hardware platform and the flow direction of data link. Then the software system of network interface expansion design is introduced in two chapters. The application and theory of software programming are introduced in the third chapter, including the software development environment Quartus II, ModelSim, SOPC Builder and Eclipse. Based on the communication protocol of multi serial port conversion module of MODBUS to RTU, the adaptive algorithm is introduced and the realization of adaptive bandwidth is discussed and studied on the basis of it. Finally, the software design architecture of network interface expansion is expounded. The whole design is divided into two modules, which are com_fifo multi serial ports, respectively. The module and nios_LAN_UART serial Ethernet conversion module provide a theoretical basis for the implementation of SOPC based network interface expansion design. The fourth chapter is the implementation of the specific network interface extension design software. The data conversion mode of the serial Ethernet conversion module is introduced, and the proprietary core of each interface is realized. The function and control of the function and control of MAX232 are started, and the soft core is configured with CPU, SDRAM, EPCS, JATG and other peripheral circuits. After the soft core is generated, the embedded serial port Ethernet interface conversion module under the NiosII soft core processor is implemented on the basis of the Ethernet and serial communication protocol TCP/IP and RS232, in order to realize the implementation of the embedded serial Ethernet interface conversion module under the NiosII soft core processor. The realization of multi serial port module is studied. The whole module is divided into the main serial port transmission module and the main serial port receiving module, and the adaptive algorithm is combined to realize the data conversion between the multi serial port and the single serial port with adaptive bandwidth adjustment. After that, the module and the system are two parties to the network expansion design. The test of the surface verifies the function and possibility of implementation.
【学位授予单位】：成都理工大学
【学位级别】：硕士
【学位授予年份】：2013
【分类号】：TP334.7;TN791

【参考文献】