基于FPGA与MCU的多串口通信接口设计与实现

发布时间：2018-02-26 21:53

本文关键词： 多设备管理器 VGA远距离传输字符随屏显示软核　出处：《南京理工大学》2014年硕士论文　论文类型：学位论文

【摘要】：现代企业对终端设备的数量使用的迅速增加,催生集中管理机制KVM技术的诞生,KVM即为英文键盘(Keyboard),显示器(Video)与鼠标(Mouse)首字母合写,KVM系统可以通过一套鼠标,显示器和键盘管理多台终端设备,有效提高管理效率。本课题基于FPGA与MCU的多串口通信系统的接口设计是KVM技术的重要组成部分,将KVM系统外设终端的视频信号和键鼠信号调制通过CAT5电缆实现低成本远距离传输,再通过MCU和FPGA相结合的方法实现KVM系统同时与多个外设终端实时进行通信显示的要求。研究内容包括基于FPGA的UART软核设计、基于FPGA的随屏显示设计、基于FPGA与MCU的串口扩展方法以及键鼠信号、视频信号调制的相关硬件电路设计。相较专用UART芯片,基于FPGA设计的UART软核有更强的适用性和可移植性,本课题针对这个特点,设计了适用于KVM系统的具有波特率可调,奇偶可检校等功能的UART软核,采用自顶向下的设计方法,将UART软核分为若干模块应用硬件描述语言VHDL进行具体设计,再使用MCU对软核进行调用以实现多串口扩展,并应用于KVM系统实现。通过软件仿真以及系统联调,实验结果表明本设计的多串口通信系统可以满足设计要求。
[Abstract]:The rapid increase of the number of terminal equipment of modern enterprise use, the birth of birth of centralized management mechanism of KVM technology, KVM is English keyboard (Keyboard), display (Video) and mouse (Mouse) Co wrote the first letter, KVM system using a mouse, keyboard and display management of multiple devices, effectively improve the management efficiency.
The interface design of multi serial communication system based on FPGA and MCU is an important part of KVM technology, the video signal and mouse signal modulation KVM system peripheral terminal via a CAT5 cable to achieve low cost long-distance transmission method, and then through the MCU and FPGA to realize the combination of the KVM system and a plurality of peripheral terminals in real time according to communication requirements. Research contents include the core design of UART based on FPGA, with the screen display design based on FPGA, FPGA and MCU serial port expansion method and mouse signal based on the related hardware circuit of video signal modulation.
Comparing with the special UART chip, the design of FPGA based on UART core has stronger applicability and portability, aiming at this characteristic, designed with adjustable baud rate for the KVM system, can calibration functions such as parity UART core, using top-down design method, the UART core is divided into several modules using hardware description VHDL language for the specific design, then use MCU to continue the call to realize the serial port expansion, and applied to the KVM system.
Through the software simulation and the system connection, the experimental results show that the design of the multi serial communication system can meet the design requirements.

【学位授予单位】：南京理工大学
【学位级别】：硕士
【学位授予年份】：2014
【分类号】：TP334.7

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