FPGA编程：基于Verilog实现的计时器

verilog实现千兆以太网udp传输,具有发送和接收功能。同时有CRC校核代码。学习FPGA的很好的参考资料，值得大家下载。

使用cordic算法，基于verilog实现的atan功能，经过仿真验证，适宜工程使用。(ATAN,implemented with cordic.)

采用STC89C52单片机的定时器以实现两路PWM波输出，占空比、频率可调(Microcontroller timer used to achieve STC89C52 two PWM wave output, duty cycle, frequency adjustable)

说明：  SDIO 接口，实现SD卡的控制器功能，带有详细的注释(SDIO Interface,to realize the controller of SD Card,and have detail description.)

高频卡读写原理及技术编程应用--卡的读取，写入。(High-frequency card reader technology)

说明：  基于无源蜂鸣器和矩阵按键的电子琴系统设计(design of Electronic Piano System Based on Passive Buzzer and Matrix Key)

basys3的数字钟，可以显示00.00-59.59(Digital clock of basys3,It can display 00.00-59.59)

如何编写测试文件，，test bench的编写方法和是列，，总结的非常好的东西(how to code test bench in verilog)

说明：  编码方式为213的Viterbi卷积码编码器和译码器的FPGA的实现，包含整个QuartusＩＩ的工程文件，解码方式为寄存器交换法(Encoding for the 213 convolutional code encoder and Viterbi decoder FPGA realization of the project file that contains the entire QuartusII, decoding method for the register exchange)

说明：  Verilog实现按键消抖，工程，已下板验证通过。(Verilog achieves keystroke jitter elimination. The project has been validated on the lower board.)