I write the digital phase

实施软件定义无线电的关键第一步是向与数字到模拟控制器接口。好花费的时间是在这工作，因为驾驶 DAC 的信号的时间必须是正确的设备才能正常工作。Spartan3e 培训师局是有 LTC2624 DAC 连接到通过 SPI 总线 FPGA。用于进行通信的 DAC 的信号是 SPI_MOSI、 DAC_CS、 SPI_SCK、 DAC_CLR。下表中描述的接口信号。

液晶显示屏显示汉字“年”的驱动程序VHDL(nian VHDL)

本程序采用VHDL语言设计了虚拟电子琴。电子琴的设计包括四个模块：弹奏模块keyplay、自动演奏模块autoplay、查表及显示模块table和分频模块fenpin。 弹奏模块keyplay根据按键动作 请点击左侧文件开始预览 ！预览只提供20%的代码片段，完整代码需下载后查看 加载中 侵权举报

对ccd图像进行解码采集，并通过VGA输出(Ccd image decoding of the collection, and through the VGA output)

说明：  中科院FPGA的课件！纯英文，比较简单，适合刚刚接触FPGA的小白！(Chinese Academy of Sciences FPGA courseware! Pure English, relatively simple, suitable for Xiaobai who just came into contact with FPGA!)

说明：  fpga配置锁相环完整程序，使用quartus IP核，Verilog语言。(FPGA configuration PLL complete program, Verilog language.)

完成十余卷积过程，简单方便，能够这样那样这样，sorry-Convolution process more than a decade to complete, simple and convenient, this can be done this way, sorry

Design of a GF(64)-LDPC Decoder Based on the EMS Algorithm

说明：  there's a clock divider for DE2 altra board clock (50MHz)

基于FPGA器件的DDS设计实现中的一个核心部分就是波形存储表的设计。首先采用LPM_ROM和 VHDL选择语句这两种方法进行波形存储表的设计和比较分析 然后考虑到硬件资源的有限性及DDS的精度要 求,对这两种方法的程序进行了优化 最后对这两种方法设计的程序进行仿真和硬件调试。结果表明:采用这两种 方法都能有效地实现DDS中波形存储表的设计。 (DDS-based FPGA devices designed to achieve one of the core of the waveform is stored in table design. First of all, choose to adopt LPM_ROM and VHDL statements of these two methods for the design waveform storage tables and comparative analysis and then, taking into account the limited hardware resources and the accuracy of DDS, the two methods to optimize the process the last of these two methods of process design simulation and hardware debugging. The results showed that: the use of these two methods are all effective ways to achieve the DDS waveform stored in the table design.)