vhdl

基于单片机的DDS信号发生器，具有DDS思想的单片机编程。。。(Sunplus based DDS signal generator with DDS thinking microcontrollers. . .)

4*4按键扫描电路，用数码管显示0~F，基于VHDL语言设计，包括按键扫描，数码管扫描，数码管显示，按键消抖等代码

AVS运动补偿电路的VLSI设计与实现 提出了一种基于AVS标准的高效的运动补偿电路硬件结构，该设计采用了8 X 8块级流 水线操作，运动矢量归一化处理和插值滤波器组保证了流水线的高效运行以及硬件资源的最优 利用。采用Verilog语言完成了VLSI设计，并通过EDA软件给出仿真和综合结果。-AVS motion compensation circuit of VLSI Design and Implementation of a standard based on the AVS motion compensation circuit efficient hardware structure, the design used 8 X 8 block-level pipelining, the normalized motion vector processing and interpolation filter bank guarantee efficient operation of the pipeline, as well as the optimal use of hardware resources. Using Verilog language completed VLSI design and EDA software through simulation and synthesis results.

说明：  4位数码扫描显示电路,我们控制一个七段LED需要8个输出端口；如果要输出四位十进制数，就需要32的输出端口，这将占用大量的端口资源。采用串行扫描显示，我们只需要8+4共12个端口即可。其原理是：用一个四位的输出端控制，某一时刻只选中其中的一个LED（输出为‘1’表示选中），八位的输出端将该LED所需要显示的值输出；然后四位的输出端值改变，选中下一个LED。这样依次类推。如果选择的频率很快，达到50Hz以上，由于人眼的视觉暂留效应，看起来就像4个LED同时显示。 设计一个程序，输入四个一位十进制数，用4个LED显示出来。CLK采用频率可调信号发生器，逐渐改变频率，观察扫描频率的改变对输出效果的影响。 输入：连续脉冲，逻辑开关；输出：七段LED。 (4 digital scanning display circuit, we need to control a seven-segment LED output port 8 If you want to output four decimal numbers, you need the output port 32, which will take up a lot of ports. Serial scans showed, we need only 8 of 12 ports can be+4. The principle is: the output of four with a control, a time to select only one LED (output 1 is selected), 8 output of the LED by the need to show the value of the output then The output value of the four changes, select the next LED. This and so on. If you select the frequency rapidly, reaching more than 50Hz, as the human eye s persistence of vision effect, looks like a 4 LED display simultaneously. Design a program, enter a decimal number four, with four LED display. CLK signal generator with adjustable frequency, gradually changing the frequency of observed changes in scan frequency effect on the output. Input: Continuous pulse, logic switches output: seven-segment LED.)

实用的程序代码，希望对大家有用，已经调试通过-Practical program code, in the hope that useful to everybody, has debugging through

说明：  lvds_rx IP核硬件设计代码，使用时注意LVSD_RX模块的延时参数的设置，3.5倍时钟相位的设置(Lvds IP core hardware design code, when using the attention LVSD module delay parameter settings, 3.5 times the clock phase settings)

relative cpu design implementation

This VHDL code takes a clock, reset, Capture_EN and SPI data LT2315 ADC and generates SPI_CLK and SPI_nCS of it and reads 12-bit serial data ADC and returns 12-bit parallel data.

关于MPEG压缩的程序，里面有较多的源代码和完整的说明是用MICROBLAZE完成的。(On the MPEG compression process, there are more source code and complete description is completed with MicroBlaze.)

说明：  Implementing QPSK using DSS