实用的程序代码，希望对大家有用，已经调试通过

四阶数字滤波器 用不同的算法设计数字滤波器，并且有详细的是用方法(Fourth-order digital filter design with a different digital filter algorithms and a detailed method is)

Rotary Encoder Reading the Rotary Encoder and indicating the selection through a LED placed on the front panel. Events counter for the Rotary Encoder and displaying the events on the front panel Project: events counter for the rotary encoder and displaying the events on the SSD Pmod (Seven-Segments Display Programable module).

7段数码显示译码器设计7段数码是纯组合电路，通常的小规模专用IC，如74或4000系列的器件只能作十进制BCD码译码，然而数字系统中的数据处理和运算都是二进制的，所以输出表达都是十六进制的，为了满足十六进制数的译码显示，最方便的方法就是利用译码程序在FPGA/CPLD中来实现。例子作为七段译码器，输出信号LED7S的7位分别接数码管的7个段，高位在左，低位在右。例如当LED7S输出为“1101101”时，数码管的7个段g、f、e、d、c、b、a分别接1、1、0、1、1、0、1；接有高电平的段发亮，于是数码管显示“5”。-7 digital display decoder design 7 Digital is pure combinational circuits, usually of small-scale dedicated IC, such as 74 or 4000 Series devices can only be used to decimal BCD decoder, but digital systems in the data processing and computing are binary, so the output expression are hexadecimal, and hexadecimal number in order to meet the needs of the decoding shows that the most convenient way is to use decoding process in FPGA/CPLD in to achieve. Seven-Segment decoder as an example, the output signal of the seven were LED7S access digital pipe 7 above, high in the left, low in the right. For example, when LED7S output as

本代码用verilog语言配合sopc和nios实现了串口调试的目的。软件编程用C语言描述，只是比较简单的例子，适合初学者做了解用，本人亲自在EP2C8Q上实践。(The code to use verilog language sopc and nios achieved with serial debugging purposes. Software programming using C language description, but relatively simple example for beginners to do with understanding, I personally EP2C8Q on practice.)

基本的usb驱动程序的编程方法,值得一看.-Basic programing method for USB driver, worth reading

RS译码的Euclid算法及其FPGA实现，并通过仿真器的出结果，对于设计ＲＳ译码很有帮助-RS decoding Euclid algorithm and its FPGA implementation, and through the simulator results are helpful for the design of RS decoder

VHDL入门级好教材《VHDL开发精解与实例剖析》(VHDL development solution with fine examples of analysis)

SDRAM控制器设计代码，我们写的SDRAM控制器是肯定包括初始化、读操作、写操作及自动刷新这些操作的，既然这样，我们就可以给每一个操作写上一个模块独立开来，这样也便于我们每个模块的调试，显然这种思路是正确的。那怎么让我们的各个模块工作起来呢，虽然都是独立的模块，但很显然这几个模块之间又是相互关联的。就拿上面刚才说的那个情况来讲，如果SDRAM需要刷新了，而SDRAM却正在执行写操作，那我们刷新模块与写模块之间怎么进行控制呢？这个问题解决了，读模块与刷新模块之间的这个问题也可以很轻松的解决。

对PCM编码的多路复用与解复用程序，VerilogHDL源程序-Of PCM-encoded multiplexing and demultiplexing process, VerilogHDL source

MX25L6445E开发时间，Verilog语言(MX25L6445E development time, Verilog language)