锁相环设计及 fpga 实现

说明：  传感器是一种检测装置，能感受到被测量的信息，并能将感受到的信息，按一定规律变换成为电信号或其他所需形式的信息输出，以满足信息的传输、处理、存储、显示、记录和控制等要求(Sensor is a kind of detection device, which can sense the measured information and transform it into electrical signal or other required information output according to certain rules to meet the requirements of information transmission, processing, storage, display, recording and control.)

是有verilog编程的电子琴的源程序，可以在xilinx软件中运行，并实现音乐的自动播放，还有弹奏的功能。

利用VHDL语言编写的4*4键盘扫描程序，经过测试，可以放心使用。(Using VHDL language 4* 4 keyboard scanning procedures, tested, safe to use.)

代码是一个复数乘法器，两个复数相乘，只用到了2个实数相乘，运算量少(Code is a complex multiplier, two complex multiplication, uses only real number multiplied by 2, operations less)

AES128 encription vhdl code

说明：  这是8位CPU的CVDL代码。CPU 的主要功能是执行指令，控制完成计算机的各项操作，包括运算操作、传送操作、输入/输出操作等。作为模型计算机设计，将重点放在寄存器级，采取较简单的组成模式，以尽量简洁的设计帮助学生掌握CPU 的基本原理。 此次设计CPU就是为了了解CPU运行的原理，从而完成从指令系统到CPU的设计，并且通过仿真对CPU设计进行正确性评定。(The main function of CPU is to execute instructions, control and complete various operations of computer, including operation, transfer operation, input / output operation, etc. As a model computer design, it focuses on register level and adopts a simpler composition mode to help students master the basic principles of CPU with a concise design as far as possible. This design of CPU is to understand the principle of CPU operation, so as to complete the design from instruction system to CPU, and evaluate the correctness of CPU design through simulation.)

开关数据加载到寄存器并显示的设计与实现.3． 设计一个可以把4个开关的内容存储到一个4位寄存器的电路，并在最右边的7段显示管上显示这个寄存器中的十六进制数字。我们使用到去抖动模块clock_pulse， 用btn[0]作为输入；8位寄存器模块，用btn[1]作为加载信号；7段显示管上的显示模块x7segbc；分频模块clkdiv，用以产生模块clock_pulse和x7segbc的clk190时钟信号。(Design of switching data is loaded into the register and display the.3. design and implementation of a 4 switch content storage circuit to a 4 bit register, and in the 7 section of the most on the right shows the register in the sixteen decimal digital display tube. We used to go to the jitter module clock_pulse, with btn[0] as the input 8 bit register module, as the loading signal by btn[1] 7 segment display module on the x7segbc pipe frequency module clkdiv, clk190 clock signal for generating module clock_pulse and x7segbc.)

说明：  fpga实现相关滤波算法中的CSK算法，采用仿真的方式验证结果 fpga是xilinx 仿真工具是vivado2018.2 语言是verilog(The CSK algorithm is implemented in FPGA, and the results are verified by simulation FPGA is Xilinx The simulation tool is vivado 2018.2 Language is Verilog)

说明：  设计一个哈夫曼编码器 要求对一段数据序列进行哈夫曼编码，使得平均码长最短，输出各元素编码和编码后的数据序列。 ① 组成序列的元素是[0-9]这10个数字，每个数字其对应的4位二进制数表示。比如5对应0101，9对应1001。 ② 输入数据序列的长度为256。 ③ 先输出每个元素的编码，然后输出数据序列对应的哈夫曼编码序列。(Designing a Huffman Encoder Huffman coding is required for a data sequence to minimize the average code length and output the coded and coded data sequence of each element. (1) The elements that make up the sequence are the 10 digits [0-9], and each digit is represented by its corresponding 4-bit binary number. For example, 5 corresponds to 0101, 9 corresponds to 1001. (2) The length of the input data sequence is 256. (3) First output the encoding of each element, and then output the Huffman encoding sequence corresponding to the data sequence.)

实现fpga上交通灯的设计，可以在开发板上实现红绿灯(Design of traffic lights on FPGA)