xc2s100E FPGA的原理图 给想涉足FPGA的新人参考

A 4 bit twisted ring counter is a sequential circuit which produces the following sequence of output values: 0000, 1000, 1100, 1110, 1111, 0111, 0011, 0001 and then repeats. Design a circuit for a 4 bit twisted ring counter that uses four D flip flops. Draw a state transition diagram, a state table and a schematic for your circuit. Design an alternate implementation using just three flip flops and draw a state transition diagram, state table and a schematic for your circuit. If your designs are extended to implement an n bit twisted ring counter, how many flip flops are required using each of the two approaches. In what situations would you prefer the first method? In what situations would you prefer the second?

这是基于verilog hdl的数字时钟源代码，能够实现时分秒的计时，可以手动进行调时与调分。(This is based on the digital clock verilog hdl source code, can be achieved when every minute of the time, you can adjust the time manually adjusting points.)

详细讲述TURBO码的FPGA实现原理，可作参考，不是码源(A detailed account of the FPGA implementation of principle of the TURBO code can be used as reference, not source code)

sm4 VERILOG 代码实现及其在无线网络3G中的应用(sm4 VERILOG)

EP2C35A实验箱基于NIOSII的串行AD_DA编程(EP2C35A experimental box based NIOSII the serial AD_DA programming)

读取AD7895 的12位ADC转换值，连续读取方式，采样速率为20mS 一次。(Read the 12 bit ADC conversion value of AD7895.)

直接序列扩频通信的Verilog仿真代码，在Quartus II中实现。(Direct sequence spread spectrum communication Verilog simulation code, implemented in Quartus II.)

说明：  VIVADO SOC 使用文档 基于zynq 7020(vivado soc example text of zynq)

A design on a DE270 FPGA with the use of CCD: a camera DC2 and a TRDB LTM after reading from the SRAM.

基于CPLD的实现控制8x8点阵动态显示心型图案的程序，使用VHDL语言，通过调节分频系数可以实现点阵的变换速度，通过改变不同的状态可以让点阵显示不同的图案。