基于ZedBoard开发板的LinuxOS支持下的X射线高精度TDC系统的研究

发布时间：2018-04-28 14:28

本文选题：嵌入式Linux系统 + FPGA　；参考：《昆明理工大学》2017年硕士论文

【摘要】：基于ZedBoard开发板的Linux OS支持下的X射线高精度TDC系统的研究是以“X射线拼接探测时间测量电路的研制”课题为背景,选用ZedBoard开发板为硬件平台,在嵌入式Linux操作系统控制下,利用FPGA(Field-Programmable Gate Array现场可编程门阵列)技术设计的时间数字转换电路TDC(Time To Digital Convert)实现实时数据采集的功能,并将采集数据存放于Linux系统中的.txt文件中。本论文的硬件电路基础为Xilinx公司的Zynq-7000系列的ZedBoard开发板,此开发板的集成了 FPGA和ARM-9两种技术,ARM体系结构下的嵌入式Linux系统可以对利用FPGA技术实现的TDC硬件模块进行读写和控制。同时对前期基于Virtex5开发板高精度皮秒级TDC硬件电路进行修改,使其实现通过软件编程设计的TDC模块和ZedBoard开发板的硬件资源相统一,其中包括硬件延迟单元的重新设计,因不同开发板硬件全局时钟频率不同而对TDC及相关计数模块进行的修改,并增加了管道FIFO数据缓存模块,实现不同时钟域的数据传输。对AXI总线的TDC外设IP核进行设计,在ZedBoard开发板搭建起TDC和Cortex-A9核之间通信的硬件桥梁,并实现在软件控制下的裸机运行,通过Debug调试确保硬件系统设计的正确性。在VMware虚拟机下的Linux系统中搭建交叉编译环境,对Linux内核的编译剪裁,并进行根文件、设备树和BOOT.BIN文件的创建,完成在ZedBoard开发板上的嵌入式Linux系统移植。设计针对硬件系统的驱动程序,实现Linux内核对TDC设备的访问,同时设计Linux系统下的用户程序,最终实现对TDC的数据采集功能。本设计通过在嵌入式Linux系统下FPGA和ARM的协同工作,达到了对高精度数据采集的实时性、低功耗、高性能的目的,同时本文提出的设计方法,在智能工业控制、智能家居、军事、环境监测等领域,具有广泛的应用前景和实用价值。
[Abstract]:The research of X-ray high-precision TDC system supported by Linux OS based on ZedBoard development board is based on the subject of "Research and Development of X-Ray splicing Detection time Measurement Circuit". The ZedBoard development board is chosen as hardware platform and under the control of embedded Linux operating system. The time digital conversion circuit (TDC(Time To Digital Convert) designed by FPGA(Field-Programmable Gate Array (Field Programmable Gate Array) technology is used to realize the function of real-time data acquisition, and the collected data is stored in the .txt file in the Linux system. The hardware circuit of this paper is based on the ZedBoard development board of Zynq-7000 series of Xilinx company. The embedded Linux system under the arm architecture of FPGA and ARM-9 can read, write and control the TDC hardware module realized by FPGA technology. At the same time, the hardware circuit of high-precision picosecond TDC based on Virtex5 development board is modified to realize the unification of hardware resources of TDC module and ZedBoard development board designed by software programming, including the redesign of hardware delay unit. Because the global clock frequency of different development board hardware is different, the TDC and the related counting module are modified, and the pipeline FIFO data cache module is added to realize the data transmission in different clock domains. The TDC peripheral IP core of AXI bus is designed. The hardware bridge between TDC and Cortex-A9 core is built on the ZedBoard development board, and the naked machine running under the control of software is realized. The correctness of the hardware system design is ensured by Debug debugging. The cross-compiling environment is built in the Linux system under the VMware virtual machine, the compiling and tailoring of the Linux kernel is done, and the root file, the device tree and the BOOT.BIN file are created, and the embedded Linux system is transplanted on the ZedBoard development board. The driver of the hardware system is designed to realize the access of the Linux kernel to the TDC device. At the same time, the user program under the Linux system is designed. Finally, the data acquisition function of the TDC is realized. Through the collaborative work of FPGA and ARM in embedded Linux system, the design achieves the goal of real-time, low power consumption and high performance of high precision data acquisition. At the same time, the design method is put forward in this paper, such as intelligent industrial control, smart home, military affairs, etc. Environmental monitoring and other fields, has a wide range of application prospects and practical value.
【学位授予单位】：昆明理工大学
【学位级别】：硕士
【学位授予年份】：2017
【分类号】：O434.1;TN791;TP316.81

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