序列检测器

VHDL,简易音频数字相位表的设计与实现 数字相位测量仪在工业领域中经常用到的一般测量工具，主要应用与同频率正弦信号间的相位差的测量显示。 本系统采用FPGA实现测量的核心部分，主要由数字鉴相、累加计数器、控制器以及寄存与显示译码电路组成。该系统硬件电路简单，整个系统采用硬件描述语言VHDL作为系统内部硬件结构的描述手段，在XILINX公司的ISE9.1的软件支持下完成。可以对20Hz~20kHz频率范围内的音频信号进行采样鉴相处理，并将数据传回FPGA进行相位差计数累加、测量运算，最后送显示译码电路显示，测相范围为 ，相位测量误差 < 。 经测试结果验证，本系统充分利用FPGA对数据的高速处理能力，是系统设计高效、可靠，处理速度快，稳定性高，易于实现。 (VHDL, simple audio digital phase Table Design and Implementation of the digital phase meter general measurement tools are often used in the industrial field, the measurement of the phase difference between the main application with the same frequency sinusoidal signal. The system uses the FPGA implementation of the core part of the measurement, mainly by the digital phase, cumulative counter, the decoding circuit of the controller as well as storage and display. The system hardware circuit is simple, and the entire system using hardware description language VHDL system means a description of the internal hardware structure, completed in the XILINX company ISE9.1 software support. The audio signal in the frequency range of 20Hz ~ 20kHz sampling KAM-phase process, and the data returned FPGA retardation counted accumulation measuring operation, and finally sent to the decoding circuit, the scope of the measurement phase, the phase measurement error < . The test results verify the full u)

ldpc verilog code has been descripted in this program

基于DDS的信号源设计（包括三角波、正弦波、方波）(Design of signal source based on DDS)

XILINX 时序约束使用指南笔记 ——时序约束介绍 时序约束方法 时序约束原则等(XILINX time series constraints use guide notes -- time series constraints introducing time series constraint principles, etc.)

在quartusII环境下采用对编解码芯片HD6408和HD6409驱动的方式实现曼彻斯特编解码(Environment in quartusII codec chip used on the HD6408 and HD6409-driven way to achieve encoding and decoding of Manchester)

酷睿系列流水灯通用程序，来回往返流水，点亮led(ledwater for ep2c8q208c8)

多年项目经验测试文档测试文档，重要保存重要保存重要保存重要保存重要保存重要保存(Years of project experience testing document testing, it is important to save save save important important important important to save save save important)

说明：  8位RISC-CPU设计和测试文件，5位操作码支持32条指令，含堆栈实现子程序调用功能。(8-bit risc-cpu design and test file, 5-bit opcode supports 32 instructions, including stack to realize subroutine call function.)

这是语言代码的 vga 控制器，为使用 fpga 德 70 altera 和使用 quartus， 此过程描述的水平像素计数器的操作。同步设置计数器为零 fpga_reset_n 应用时。计数器上的每个像素时钟的上升沿的递增。水平像素计数器的范围是 [0,793]。当计数器达到 793 时，它翻转为零在下一个周期。因此，该计数器有 794 像素时钟的期间。同为 25 MHz 的像素时钟，这一段时间的 31.76 μ s 转化。

说明：  在FPGA板卡上面，通过单个按键实现串口的发送功能，带仿真需要自行修改一下工程配置(On the FPGA board, the sending function of the serial port is realized by a single key, and the engineering configuration needs to be modified by the simulation)