VHDL，verilog串并转换源程序 Xilinx公司参考资料

8b10b编解码，用于光通信和千兆以太网，verilog编写，已验证(8b10b codec for optical communications and Gigabit Ethernet, verilog prepared Verified)

计时范围为59.99秒；有计时开始和停止计时控制，复位控制可以对所有计时进行异步复位；计时结果由四位七段数码管显示。

说明：  16位右移位寄存器 下面描述的是一个位宽为16位的右移位寄存器，实际具有环形移位的功能，是在右移位寄存器的基础上将最低位的输出端接到最高位的输入端构成的。其功能为当时钟上升沿到达时，输入信号的最低位移位到最高位，其余各位依次向右移动一位。(16-bit right shift register The following description is a right shift register with a bit width of 16 bits. It actually has the function of circular shift. It is based on the right shift register, which connects the lowest bit output terminal to the highest bit input terminal. Its function is that when the rising edge of the clock arrives, the lowest displacement of the input signal reaches the highest position, and the rest of you move one bit to the right in turn.)

RS码的FPGA实现，verilog语言形式，好参考资料(FPGA realization of RS code, verilog language form, a good reference)

one of example about hardware design language

FPGA实现串口发送 Verilog 语言(Serial reception FPGA Verilog language.)

一个小程序,弹跳消除电路,可消除按健的毛刺干扰-a small procedure, bouncing elimination circuit, according to remove the burr-interference

一个FIFO产生程序，主要是一个格雷码的加法器(A FIFO generation process, is primarily a gray code adder)

1、 利用FLEX10的片内RAM资源，根据DDS原理，设计产生正弦信号的各功能模块和顶层原理图； 2、 利用实验板上的TLC7259转换器，将1中得到的正弦信号，通过D/A转换，通过ME5534滤波后在示波器上观察； 3、 输出波形要求： 在输入时钟频率为16KHz时，输出正弦波分辨率达到1Hz； 在输入时钟频率为4MHz时，输出正弦波分辨率达到256Hz； 4、 通过RS232C通信，实现FPGA和PC机之间串行通信，从而实现用PC机改变频率控制字，实现对输出正弦波频率的控制。-a use FLEX10-chip RAM resources, in accordance with DDS principle, design sinusoidal signal generated by the top-level functional modules and schematics; 2, the experimental board TLC7259 converters, will be a sinusoidal signal, the D/A conversion, after filtering through the ME5534 oscilloscope observation; 3, the output waveform requirements : the input clock frequency of 16KHz, sine wave output resolution of 1Hz; the input clock frequency of 4MHz, the sine wave output resolution of 256Hz; 4, RS232C communications, FPGA and PC serial communications between in order to achieve PC-frequency control characters, the realization of sine wave output frequency control.

秒表 东北大学秦皇岛分校 电子设计自动化 实验(Stopwatch Northeastern University at Qinhuangdao electronic design automation experiment)