对于一个扫描程序的编写进行VHDL开发环境

用FPGA verilog hdl实现千兆以太网MAC。-Using FPGA verilog hdl realize Gigabit Ethernet MAC.

Quartus2环境下基于VHDL状态机的交通灯程序(VHDL state machine traffic lights based on Quartus2 environment)

利用单片机控制LED时钟显示，以及闹钟，程序较大，但比较简单易懂。(LED clock display)

简单介绍了直接数字频率合成技术(DD S)，利用DDS设计任意 波形发生器，其能够产生矩形波、正弦波、三角波、锯齿波等多种波形 -A brief introduction of direct digital frequency synthesis (DD S), the use of DDS design of arbitrary waveform generator, which can produce rectangular wave, sine wave, triangle wave, sawtooth waveform etc.

说明：  CC217编程序，verilog实现，串行输入串行输出(CC 217 program, to achieve Verilog, serial input serial output)

采用costas环进行DPSK解调的程序。输入数据速率2.4Kbps，载波频率12KHz，采样率1.6MHz， 输入数据位宽12位，快捕带为799.617Hz(Costas ring using DPSK demodulation process. Input data rate 2.4Kbps, carrier frequency 12KHz, sampling rate 1.6MHz, the input data 12 bits wide, fast catching band is 799.617Hz)

温湿度传感器sht30驱动，系统时钟为125M可读出温湿度。(sht30 driver,sysclk=125MHZ)

说明：  文件用于驱动TFT屏，分辨率800*400，平台为quartus13，芯片为cycloneIV(The file is used to drive the TFT screen with a resolution of 800*400. The platform is quartus 13 and the chip is cyclone IV.)

一种压缩感知信号恢复算法，针对贪婪迭代类算法中的正交匹配追踪（OMP)算法的改进。OMP在每次迭代过程中选择出的原子并不是最优的，无法使本轮迭代中残差的减少最大化。本例程实现了改进的最优OMP算法，即Optimised_OMP，保证每次迭代选出的原子与已选出的原子序列所构成的平面正交，因而可以使残差下降的更快，从而加速算法收敛。(A compressed sensing signal recovery algorithms track (OMP) algorithm and orthogonal matching algorithm greedy iterative class. The OMP selected atoms in each iteration of the process is not optimal, not be able to maximize the reduction of the residual in the current round of iteration. The routines to achieve the optimal OMP algorithm improvements that Optimised_OMP, to ensure that each iteration selected atoms with atomic sequence elected a plane orthogonal, and thus can make the residuals have declined even faster, thus speeding up the algorithm convergence.)

利用VHDL语言编写的一个crc功能模块，可下载到FPGA实现功能-use VHDL to prepare a crc function of the module, which can be downloaded to the FPGA functions