双端口 ram，读写

verilog语言编写的jtag（边界扫描模块），初学的时候可以看看(verilog language jtag (boundary scan module), a novice when you can look)

先行进位加法器（CLA）代码的Verilog〜它包括测试平台我希望这将有助于你

Shift reg in vhdl, a first example to start

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.)

说明：  用matlab将图片转成灰度图TXT，再通过verilog将数据导入FPGA中，采用高斯滤波算法来处理，再将处理后的图片数据导出到TXT中。(The image is transformed into gray-scale image TXT by MATLAB, and then the data is imported into FPGA by Verilog, processed by Gauss filter algorithm, and then the processed image data is exported to TXT.)

MPSK调制与解调VHDL程序源代码与仿真(MPSK modulation and demodulation process and VHDL source code and simulation)

特大好消息，这是LED全彩控制卡的FPGA的源程序，做LED开发的，绝对有很好的价值(Big good news, this is full-color LED control card FPGA of the source, do LED development, the absolute value of good)

实现基于NIOS的 EP3C16与加速度传感器NMA7455的IIC基本通信(Realization of based on NIOS EP3C16 and acceleration sensor NMA7455 IIC of basic communication )

The PID controller IP core performs digital proportional–integral–derivative controller (PID controller) algorithm. The algorithm first calculates the error between a measured value (PV) and its ideal value (SP), then use the error as an argument to calculate the manipulate value(MV). The MV will adjust the process to minimize the error. It can be used to calculate duty cycle for PWM (Pulse Width Modulation).

这个核接收红色，绿色和蓝色的像素值作为输入，就像从一个tiff图片文件一样，产生构建一个JPEG图片所需的JPGE比特流。这个核是用通用的、一般的Verilog代码编写，可以运行到任何FPGA上。这个核不依靠于任何的专用IP核，所有用来实现JPEG编码器的功能都是用Verilog编写的，整个代码都是独立的。这个核在不同的量化和霍夫曼表下，在很多图片上仿真过。效果很好！