通过VHDL语言的例子，乒乓球运动的FPGA原型样机（2章）是

this is a verilog code for root raised cosine filter

HDL example source code 2/5 dff_en

基于NIOS的CF卡应用(包括了软件和硬件),ALTERA的IP库中只提供了底层的硬件寄存器描述头文件.这是个基于IP核HAL的软件,以及相应的硬件设计示例.-NIOS based on the CF card applications (including the software and hardware), ALTERA the IP library provides only the bottom of the first document describes the hardware registers. This is a HAL-based IP core of the software, hardware design and the corresponding sample.

数控分频器设计:对于一个加法计数器，装载不同的计数初始值时，会有不同频率的溢出输出信号。计数器溢出时，输出‘1’电平，同时溢出时的‘1’电平反馈给计数器的输入端作为装载信号；否则输出‘0’电平。 -NC divider design : an adder counter, loading the initial count value, have different frequency output signal of the overflow. Counter overflow, the output"1 "Level, Overflow at the same time the"1 "level feedback to the counter input signal as loading; Otherwise output"0 "level.

SRAM的读写代码，对SRAM进行了乒乓操作，用VHDL语言进行设计，很有参考价值，甚至可以直接复制代码来进行自己的设计(SRAM read and write code, ping-pong operation carried out on the SRAM, using VHDL language design, of great reference value, or even directly copy the code to carry out their own designs)

在数字通信中，通常直接从接收到的数字信号中提取位同步信号，这种直接法按其提取同步信号的方式，大致可分为滤波法和锁相法。锁相法是指利用锁相环来提取位同步信号的方法，本设计方案就是基于锁相环的位同步提取方法，能够比较快速地提取位同步时钟，并且设计简单，方便修改参数。采用Quartus II设计软件对系统进行了仿真试验，并用Altera的Cyclone II系列FPGA芯片Ep2c5予以实现。(In digital communication, usually from receiving directly in digital signal extracted a synchronized signal, the direct method according to the extraction synchronized signal way, can be roughly divided into filtering method and phase lock method. Phase lock method is using of phase locked loop to extract a synchronized signal method, the design scheme is based on phase locked loop of a synchronous extraction method and can be quickly extract a synchronous clock, and design simple, convenient modification parameter. The Quartus II design software of the system, and the simulation test Altera Cyclone II FPGA chip to achieve Ep2c5 series.)

介绍了基于VHDL的可编程分频器在波形发生器中的应用的方法，利用这一方法， 可使波形频率在大范围内变化。()

FCFS (First Come First Served) with Database

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华为内部资料，华为FPGA全套资料，包括华为的专利设计(Internal information Huawei Huawei FPGA complete information, including Huawei' s patented design)