设计并制作一个14键单音电子琴预先存入一些曲谱电路在4Hz的时钟控制下自动播放 通过220V电源适配器给电路提供工作电源...

本文首先回顾了LDPC码的发展历程和现状，介绍了LDPC码检验矩阵的构造、编 译码原理。在对编译码作了深入探讨和分析后，接着进行了RU算法编码和长码编码 的FPGA实现;根据二叉树的性质，提出了一种长码编码的ASIC优化设计的方法，节省 了大量硬件资源;论文详细阐述了CORDIC算法原理以及LDPC码译码中所采用的指 数函数和反双曲正切函数的FPGA实现:CORDIC内核及前后处理单元设计、仿真、综 合及数据分析，这对LDPC码的译码具有很重要的意义，为用数字VLSI来实现LDPC的 译码奠定了基础。同时在基于校验矩阵的环路检测定理基础上，将校验矩阵转化为转 移概率矩阵，详细分析并提出了一种基于转移概率矩阵的围长检测方法，并对其进行 了理论证明，具有很好的围长检测效果，以及状态分类判别。(Research and implementation of LDPC coding and decoding technology)

说明：  采用FPGA（现场可编程门序列）编写VHDL语言设计多路同步脉冲发生器，对信号进行分频处理，实现四路信号相位相差T/16和T/8的延迟相位输出，实现的四路脉冲与传统的脉冲同步器不同，它具有高集成度，高通用性，容易调整和高可靠性等特点。(Using FPGA (field programmable gate sequence) to write VHDL language to design multi-channel synchronous pulse generator, to divide the frequency of the signal, to achieve the four-way signal phase difference T / 16 and T / 8 delay phase output, the realization of the four-way pulse is different from the traditional pulse synchronizer, it has the characteristics of high integration, high-throughput, easy adjustment and high reliability.)

售货机-VHDL语言-已调试通过 真的很好用哦~适合一切学习EDA的初学者，能够让你轻松度过EDA课！~(Vending machine-VHDL language- has been really good with debugging by Oh ~ EDA for all beginners to learn, to let you easily through the EDA class! ~)

本文档介绍了通用异步收发器（UART）VHDL 组件，它可以使用，也可以与PmodRS232或与一个板上的RS232端口。一个UART 部件被用于转换串行数据为并行数据，并且并行数据为串行数据。串行 转移到UART数据被放置在一个输出总线经过了UART将其转换成并行 信息。该总线可以被用作输入到其它逻辑门阵列中。所得到的数据可 然后再次使用UART组件被送回了串行。

利用verilog语言实现了SHA-1机密算法，具体算法与加密芯片ds28e01一致。(Using Verilog to achieve the SHA-1 secret algorithm, the specific algorithm is consistent with the encryption chip ds28e01.)

大屏幕led点阵显示的驱动时序。 使用vhdl语言描述。其中rom文件可以使用lpm_megcore自动生成。-big screen led to the dot matrix display driver timing. The use of VHDL description language. Rom which documents can be automatically generated using lpm_megcore.

GAL16V8(仿真74LS138),试验通过。包括able及jed文件。对pcb印板设计时，对简化走线特别有用。简单的修改GAL16V8程序，可灵活地进行地址译码修改。(GAL16V8 (simulation 74LS138), test passed. Including the able and jed file. Printed on the pcb board design, especially useful to simplify alignment. Simple modifications GAL16V8 program, the flexibility to change the address decoding.)

In communication systems channel poses an important role. channels can convolve many different kind of distortions to our information. In perticular wireless channels multipath distortion is sevear. and more sevear is such distortion is random. To handle this, multipath affected channels require Equalizers at receaver end. such equalizer uses different learning Algorithms for identifying channels continuously. This project is VHDL implementation of LMS learning algorithm with pipelined architecture. so this implementation can work with higher data rates with less clock speed requirments and so with less power consumpiton It uses Fixed point arithmatic blocks for filtering so suitable for coustom asic.

用于压缩感知。OMP 是一种算法

FPGA按键延时模块，产生key_value和key_flag 可直接例化调用(The key delay module of FPGA)