VHDL_count 从 0 到 9 4 7 段 LED 显示器 (đếm 0 đến 9 hiển 施耐 4 带领 7 đoạn)

说明：  this describes building spi block on verilog hdl and programming them on an fpga device

用键盘控制FPGA，再由FPGA控制VGA显示器是好东西-Use the keyboard to control FPGA, and then by the FPGA to control VGA display is a good thing

先用Matlab理论仿真，再用Verilog语言在ISE环境下编写程序，可通过手机发送指令来控制上下变频器的参数。(Firstly, we use the theory of MATLAB to simulate, and then use Verilog language to write programs in ISE environment. The parameters of up-down converter can be controlled by sending instructions from mobile phone.)

此两文件是在MAXplusII环境下开发并运行通过的VHDL文件，实现了并串口转换功能。-this document is in two MAXplusII environment through the development and operation of the VHDL documents, and the realization of serial conversion function.

基于QuartusII环境下的地铁自动售票系统(Subway auto ticketing system based on QuartusII)

基于vhdl的按键检测程序。可以有效消除抖动(vhdl key dectect program)

SPI读写AD9361，通过串口回读关键寄存器读写是否正确。(SPI reads and writes AD9361, reads and writes the key registers correctly through the serial port.)

verilog 简易频率计的设置，包括整个工程(verilog simple frequency meter settings, including the entire project)

共两个文件，一个是对网络芯片W5500进行控制的master spi接口，另一个是w5500命令控制逻辑，命令格式按照w5500芯片的要求，分为地址段，控制段和数据段进行统一控制。此外提供w5500芯片初始化及读写控制流程图。(A total of two documents, one is the master SPI interface for network control chip W5500, the other is a w5500 command control logic, command format in accordance with the requirement of w5500 chip, divided into address segment, unified control and data segments. In addition to provide w5500 chip initialization and read and write control flow chart.)

说明：  FIFO: First in, First out 代表先进的数据先出，后进的数据后出。Xilinx 在 VIVADO 里为我们已经提供了 FIFO 的 IP 核, 我们只需通过 IP 核例化一个 FIFO，根据 FIFO 的读写时序来写入和读取FIFO 中存储的数据。(FIFO: first in, first out represents the first out of advanced data, and the last in data is the last out. Xilinx has provided us with the IP core of FIFO in vivado. We only need to instantiate a FIFO through the IP core, and write and read the data stored in FIFO according to the FIFO read-write timing.)