数字电子设备上下计数器的实现

改自特权同学verilog语言写sdram测试程序；支持256M内存(verilog sdram )

关于FPGA的书籍，介绍了大量的Verilog实例，对初学者很有帮助-Books on the FPGA, introduced a large number of Verilog examples very helpful for beginners

vhdl code for multiplexer and detemines how multiplexer works

Generating a wider ALU from two small ones

TOPSWITCH-Ⅱ系列芯片在功率集成开关电源中应用的研究-TOPSWITCH-Ⅱ series of chips in the power switching power supply in the application of integrated research

串口通讯，与硬件联通调试过，收发程序是分开的。(Serial Communication)

说明：  OFDM信号的发送与接收 ，需要自取。时域图，模糊图，削峰。(Sending and receiving of OFDM signal)

TLC5615串行DA的驱动接口,采用verilog编程(TLC5615 driver DA serial interface using verilog programming)

一个用verilog实现的五子棋程序，用在fpga上，连接显示器，可选择与电脑对战或是双人对战，按wsad控制方向，回车控制落子，程序会自动判断输赢并显示结果(A 331 procedures implemented by verilog, used in fpga, connect the monitor, you can choose to play against the computer or a double play, press wsad control the direction, carriage control Lazi, the program will automatically determine the winners and losers and display the results)

说明：  PL 和 PS 的高效交互是 zynq 7000 soc 开发的重中之重，常常需要将 PL 端的大量数据实时送到 PS 端处理，或者将 PS 端处理结果实时送到 PL 端处理，但是各种协议非常麻烦，灵活性也比较差，直接通过 AXI 总线来读写 PS 端 ddr 的数据，这里面涉及到 AXI4 协议，vivado 的 FPGA 调试等。(The efficient interaction between PL and PS is the top priority of zynq 7000 SoC development. We often need to send a large amount of data from PL to PS for real-time processing, or send the processing results from PS to pl for real-time processing. In general, we will think of using DMA for processing, but various protocols are very troublesome and the flexibility is poor. This course explains how to use Axi directly Bus to read and write DDR data of PS terminal, which involves axi4 protocol, FPGA debugging of vivado, etc.)