ADC0809模数转换

VHDL 基于cpld EPM570的DA转换代码(VHDL CPLD EPM570 the DA conversion code based on)

说明：  这是一款由晶振产生的脉冲控制的数字钟，可以从00:00:00到23:59:59之间进行计时。(this is a clolk controlled by continuious pulse.it can timing from 00:00:00 to 23:59:59.)

模块vedic_2_x_2（A，B，C  ；）；

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.)

使用verliog设计实现LUT查找表乘法器，通过modelsim仿真验证通过(Designed and implemented using the LUT lookup table verliog multipliers, through simulation by modelsim)

altera官方的各种有用的参考资料，都是自己收集的，遇到问题可以很方便的查看(altera official variety of useful references, are their own collection, problems can easily view)

利用Verilog实现了二维卷积的操作，输入特征图尺寸为7x7，卷积核尺寸为5x5，分别使用了折叠、脉动阵列行固定、脉动阵列权重保持三种硬件实现设计方法来完成二维卷积的设计。

说明：  8位大小比较器的VHDL源代码，Magnitude Comparator VHDL description of a 4-bit magnitude comparator with expansion inputs(eight compared with the size of the VHDL source code, Magnitude Comparator VHDL description of a 4-bit magnitude comparator inputs with expansion)

Universal Shift Register

FPGA 全数字化实现信号发生器，产生正弦、三角、方波；幅值频率可调