build a music player with nios 2

说明：  ADDER USING VERILOG ADDER WITH VERILOG VERILOG ADDER

说明：  FPGA对系统50M时钟进行分频。FPGA最基本功能基础(FPGA Verilog program, key detection, program jitter elimination, jitter elimination, delay detection keys)

课程设计要求设计并用FPGA实现一个数字频率计，具体设计要求如下： 测量频率范围： 10Hz～100KHz 精度： ΔF / F ≤ ±2 % 系统外部时钟： 1024Hz 测量波形： 方波 Vp-p ＝ 3～5 V 硬件设备：Altera Flex10K10 五位数码管 LED发光二极管 编程语言：Verilog HDL / VHDL-curriculum design and FPGA design to achieve a digital frequency meter, the specific design requirements are as follows : measurement frequency range : 10Hz to 100KHz precision : F/F 2% external clock system : 1024Hz Waveform Measurement : square Vp-p = 3 ~ 5 V hardware : Altera Flex10K10 five digital LED light emitting diode programming languages : Verilog HDL/VHDL

AD7760模数转换，使能滤波器功能，简单易懂，可进行各种配置 全功能支持，并附加使用说明(AD7760 Full Function Support with Additional Instructions)

开发系统上采用的时钟信号的频率是20MHz，可分别设计计数器对其计数，包括计秒、分、小时、日、周、月以及年等。在每一级上显示输出，这样就构成了一个电子日历和时钟的模型。为了可以随意调整计数值，还应包含设定计数初值的电路-Development system using the clock signal frequency is 20MHz, the design can be counter to its count, including seconds, minutes, hours, days, weeks, months and years. At every level to show the output, thus constitutes an electronic calendar and clock models. Can also adjust the order value, should also be included in setting the initial count circuit

moore 状态机的一个简单的事例，初学者很好的地实例！-moore state machine of a simple example for beginners to very good example!

说明：  一种基于FPGA的调频连续波方位向多通道 FMCW SAR的实时成像信号处理方法及FPGA，包 括：步骤一、计算重构矩阵；步骤二、重构方位向 多通道数据，包括：步骤2 .1、对各个通道的回波 数据沿方位向分别间隔补零，并进行方位向傅里 叶变换；步骤2 .2、将方位向傅里叶变换之后各个 通道方位向相同位置的点组合为一个向量并与 重构矩阵相乘，得到重构完成的方位向数据；(An azimuth multichannel FMCW based on FPGA FMCW SAR real-time imaging signal processing method and FPGA, package Including: Step 1: calculate the reconstruction matrix; step 2: reconstruct the orientation Multichannel data, including: step 2.1, echo of each channel The data is compensated with zero along the azimuth direction respectively, and the azimuth Fourier is carried out Step 2.2, after the azimuth Fourier transform The points of the same position in the channel azimuth are combined into a vector and are connected withThe reconstruction matrix is multiplied to get the reconstructed azimuth data Step 2.3. Repeat step 2.3 for the data of different distance gates)

Decoder using Miller method for UHF reader

实现psk调制解调，vhdl代码，仿真文件也有(psk shixian tiaozhiyujietiao)

FPGA入门点亮一个LED灯，作为FPGA入门级程序(FPGA is)