VHDL language design stopwatch, timer function of the realization, the realizati...

收集的关于数字锁相环的理论模型和分析讨论，适用于FPGA的数字电路设计。(Theoretical models and analysis and discussion about digital PLL collected for FPGA-based digital circuit design.)

说明：  本工程使用A7系列FPGA产生DDS，用DAC0832进行正弦电压输出(In this project, A7 series FPGA is used to generate DDS, and DAC0832 is used for sinusoidal voltage output)

用Verilog实现的呼吸灯，用Verilog实现的呼吸灯(Verilog huxideng)

PCI arbi verilog source code

用Verilog实现的脉冲宽度调制程序，在quartus平台上测试成功。(Using Verilog implementation of pulse width modulation, in quartus platform test successfully.)

说明：  包含一个ALU，实现斐波那契数列的计算。1.接受两个6位二进制输入。2.通过手动输入的时钟驱动每个周期进行一次计算。3.结果输出到led灯（使用NEXYS4开发板）(Including an ALU to realize the calculation of Fibonacci sequence. 1. Accept two 6-bit binary inputs. 2. Each cycle is driven by a clock input manually. 3. Output to LED lamp (using NEXYS4 development board))

HARQ技术研究，以喷泉码为研究对象，结合LDPC纠错码而研究的。(HARQ technology research to fountain codes for the study, and research combined with LDPC error correction code.)

this a vhdl code for usb-this is a vhdl code for usb

华为FPGA设计全套资料，学习FPGA的朋友可以下载看看。(Huawei FPGA design a full set of materials, friends learning FPGA can download and see.)

LDPC码不同码率对比，1/2与1/3码率对比。码长512.迭代次数50次。(Comparison of different rate of the LDPC code, 1/2 compared with the 1/3 code rate. 512 yards long. 50 times the number of iterations.)