基于USB3.0的虚拟仪器的设计与研究

发布时间：2018-12-08 15:47

【摘要】：随着计算机技术、网络技术、电子测试技术与总线技术的深度融合,给仪器领域带来了突破性的变革,虚拟仪器技术应运而生。虚拟仪器以“软件即仪器”的思想成为当今的主流,并引领着仪器领域的发展方向。用户通过修改虚拟仪器系统的软件就能实现所需的仪器功能。经过多年的发展,各种总线式的虚拟仪器层出不穷,由于USB串行总线具有传输速度快、扩展性强、支持热插拔、成本低廉等诸多优点,USB总线式虚拟仪器将有广阔的发展应用前景。由于当前广泛使用的USB2.0数据传输系统已难以满足大容量存储测试系统对总线速率提出的更高要求,在对USB3.0协议有一定了解的基础上,提出了基于USB3.0总线的虚拟仪器的设计与研究。通过比较,选择CYUSB3014作为系统USB3.0接口的协议芯片,详细介绍了其内部架构及工作原理,并选择EP3C40F484这种低成本FPGA作为主控制器,实现数据的采集存储控制,并通过USB3.0接口将数据传输到计算机。在硬件设计方面,先进行了总体方案设计,然后重点介绍了FPGA控制模块、DDR2SDRAM数据缓存模块以及USB3.0传输模块电路设计。在系统软件设计方面,主要对FPGA程序、FX3固件程序、上位机软件进行了介绍与设计。FPGA程序设计方面,介绍了双片DDR2的乒乓双缓冲实现方法,并重点设计了基于FPGA的USB3.0控制器,实现对同步从Slave FIFO模式下的GPIF II接口的读写操作;FX3固件程序的设计,主要设计了GPIF II状态机,并配置固件程序中的各种参数;接着,在Visual Studio 2010开发平台下,基于先前的设计,使用C#语言修改添加相应代码以实现所需功能。最后,进行了接口性能测试,USB3.0接口速率可达160MB/s,并进行了模拟实验来验证,对信号源的特定波形进行采集存储,再通过上位机软件进行读数,并将波形数据进行显示,与信号源进行对照,验证了基于USB3.0的虚拟仪器的基本功能。
[Abstract]:With the deep fusion of computer technology, network technology, electronic test technology and bus technology, the field of instrument has been transformed by a breakthrough, and virtual instrument technology has emerged as the times require. Virtual instrument has become the mainstream with the idea of "software is instrument" and is leading the development direction of instrument field. Users can achieve the required instrument function by modifying the software of the virtual instrument system. After years of development, various kinds of bus virtual instruments emerge in endlessly, because USB serial bus has many advantages, such as fast transmission speed, strong expansibility, hot plug support, low cost and so on. USB bus virtual instrument will have a broad prospect of development and application. Because the current widely used USB2.0 data transmission system has been unable to meet the higher requirements of the bus rate put forward by the mass storage test system, it is based on a certain understanding of the USB3.0 protocol. The design and research of virtual instrument based on USB3.0 bus are presented. Through comparison, CYUSB3014 is chosen as the protocol chip of the system USB3.0 interface, and its internal structure and working principle are introduced in detail. The low cost FPGA such as EP3C40F484 is chosen as the main controller to realize the data acquisition and storage control. The data is transferred to the computer through the USB3.0 interface. In the aspect of hardware design, the overall scheme is designed first, and then the circuit design of FPGA control module, DDR2SDRAM data buffer module and USB3.0 transmission module is introduced. In the aspect of system software design, the paper mainly introduces and designs FPGA program, FX3 firmware program and host computer software. In FPGA program design, it introduces the realization method of ping-pong double buffer based on double-chip DDR2. The USB3.0 controller based on FPGA is designed to read and write the GPIF II interface in synchronous slave Slave FIFO mode. The design of FX3 firmware program mainly includes the design of GPIF II state machine and the configuration of various parameters in the firmware program. Then, based on the previous design, we use C # language to modify and add the corresponding code to achieve the required function under the Visual Studio 2010 development platform. Finally, the interface performance is tested. The interface rate of USB3.0 can reach 160 MB / s, and the simulation experiment is carried out to verify that the specific waveform of the signal source is collected and stored, and then read through the host computer software. The waveform data are displayed and compared with the signal source to verify the basic function of virtual instrument based on USB3.0.
【学位授予单位】：中北大学
【学位级别】：硕士
【学位授予年份】：2017
【分类号】：TP334.7;TH702

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