uart代码

说明：  通过循环读写DDR3内存，了解其工作原理和DDR3控制器的写法，由于DDR3控制复杂，控制器的编写难度高，这里笔者介绍XILINX的MIG控制器情况下应用，是后续音频、视频等需要用到SDRAM实验的基础。(Through reading and writing DDR3 memory circularly, we can understand its working principle and the writing method of DDR3 controller. Because of the complexity of DDR3 control, it is difficult to write the controller. Here, the author introduces the application of Xilinx's MIG controller, which is the basis of SDRAM experiment for subsequent audio and video.)

QUARTUSII 9.0 下的三级流水线中值滤波工程，vhdl源程序等。可用于fpga做图像预处理。(the three stage pipeline median filter project under QUARTUSII 9 , VHDL source program. which can be used by FPGA to do image preprocessing. )

一个计算机原理课程设计的作业，5级流水线CPU，指令集到代码均为自己设计，有最终报告文档，组建说明，并行除法，16位字长，定长指令，Verilog源代码，顶层设计图。结构简单，冲突解决方式也很简单，代码量小。(A computer theory course design work, five pipelined CPU, instruction set to the code are design, the final report documents the formation of parallel division, 16-bit word length, fixed-length instructions, Verilog source code, top level design. Simple structure, conflict resolution is also very simple, a small amount of code.)

鲍伍利乘数用于 2 四位二进制数比普通的那种使用更少的触发器。

VHDL Bible. It is a must read for any front end vlsi designer.

说明：  分数时延FIR滤波器FPGA设计的相关资料及软件无线电实验平台MFSS6842使用说明(Fractional delay FIR filter FPGA design related information and software radio experimental platform MFSS6842 instructions)

基于VHDL语言编写，可下载到FPGA板子上实现的cordic算法实现的设计，并用该算法实现sin和cos的计算，计算结果显示在数码显示管上，已包含按键防抖动功能的实现。(Based on VHDL language, can be downloaded to the the cordic algorithm implemented in the FPGA board to achieve the design and calculation of sin and cos using this algorithm, the results displayed on the digital display tube is included on the function of the realization of the button shake.)

应用背景在工业控制和信息通信中，i2c、usb、mac等通信技术是很频繁的通信手段，代码的好坏决定通信的是否良好，决定产品的性能。关键技术基于fpga、使用verilog语言、FPGA数字电子系统设计与开发实例导航的所有例程，包括mac、usb、i2c等，是很好的参考例子。

使用VHDL编写数字蜂鸣器音乐，整个项目文件，可直接使用 (Use VHDL to write 1602led driver, the entire project file, and can be used directly.)

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.)