fpga超声波测距

说明：  基于sv的uvm平台搭建实战，对于验证方法学来说，分层的测试平台是一个关键的概念。虽然分层似乎会使测试平台变得更复杂，但它能够把代码分而治之，有助于减轻工作负担，而且重复利用效率提升。验证平台可以类似分为五个层次：信号层、命令层、功能层、场景层和测试层。(Construction of UVM platform based on SV)

利用Verilog HDL语言设计了出租车计费器，使其具有时间 显示、计费以及模拟出租车启动、停止、复位等功能，并设置了动态扫描电路显示车费和对应时间，显示 了硬件描述语言Verilog—HDL设计数字逻辑电路的优越性。(Design using Verilog HDL language a taxi meter, it has time display, billing and simulation taxi start, stop, reset and other functions, and set dynamically display scanning circuit and the corresponding time fare, shows the hardware description language Verilog-HDL design advantages of digital logic circuits.)

本代码实现了移位寄存器功能，初学者可借鉴学习-This code implements the shift register functions, beginners can learn to learn

这是一个HDB3的译码器，实现从HDB3双极性码到高低电平二值序列的转化-This is a decoder of the HDB3, HDB3 bipolar from high-low-level code to the conversion of binary sequences

本程序设计一个基于FPGA的4相步进电机定位控制系统。由步进电机方向设定电路模块、步进电机步进移动与定位控制模块和编码输出模块构成。前两个模块完成电机旋转方向设定，激磁方式设定和定位角度的换算等工作，后一个模块用于对换算后的角度量编码输出。-This procedure to design an FPGA-based 4-phase stepper motor positioning control system. Direction set by the stepper motor circuit module, stepper motor stepper movement and positioning control module and the code output modules. The first two modules complete the motor rotation direction setting, exciting way of setting the angle and positioning of the conversion work, after a module for the point of view of the volume of converted output encoding.

sd_sdram_lcd 是读取SD卡中的数据，然后通过LCD显示(It is to read the data in SD card and display it by LCD)

基于FPGA的温度计源代码，VHLL语言-Thermometer-based FPGA source code, VHLL language

说明：  此程序用来实现图像的采集和帧数的计算功能。(Image acquisition and calculation of the number of frames.)

一个异步FIFO的verilog实现论文-err

Verilog 编写的网卡DM9000A的IP核，altera公司寄的DE2系统中的源程序核-Verilog prepared DM9000A the IP core network card, altera company sent DE2 System source of nuclear