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uvm apb verification env

总4个模块。lcd_test顶层调用矩阵和lcd_1602,lcd_diver是写时序，lcd_ctrl是初始化及用户模式（即正常工作状态：发指令；数据和位置）。key_board矩阵驱动，已经过版级验证即按相应按键能在lcd上显示。

Once the FPGA is located, the rest of the mapping data for the other components can be determined dynamically its section mapping registers.

异步FIFO的实现，很经典的三段式状态机的写法。(The realization of the asynchronous FIFO, very classic three-step writing state machine.)

用verilog状态机实现的自动售货机，是一次课程作业，参考了网上的例子进行了修改(Automatic vending machine implemented with Verilog state machine)

通过一个计数器来实现输出信号的占空比要求，可以将duty_cycle分配到拨码开关上,LED分配到发光二极管上,然后调节拨码开关,即可看到LED的亮度发生变化.(The duty cycle of the output signal can be assigned to the dial switch by a counter, and the LED can be assigned to the light emitting diode. Then the brightness of the LED can be seen by adjusting the dial switch.)

Nonlinear discrete system identification, It uses a pulse of consumer law, Partial least squares method.

使用verilog实现模六十计数即0-1-2-3-4-5-.......-59-0-1-2的功能。(Use Verilog to realize the function of the mode sixty count, 0-1-2-3-4-5-....-59-0-1-2.)

文利用直接数字频率合成器(DDS)与CPLD技术和单片机控制技术，研制和 设计了高分辨率、高稳定度的函数信号发生(Wen using direct digital frequency synthesizer (DDS) and CPLD technology and single-chip microcomputer control technology, development and Design of high resolution, high stability function of the signal )

维特比译码器使用维特比译码算法采用卷积码进行编码的比特流解码。还有其他算法译码卷积编码的流 （例如，Fano 算法）。维特比译码算法是最耗费资源的但它的最大似然解码。这最常用的约束长度 k 的卷积码译码 < = 10，但值 k = 15 都在实践中使用。由安德鲁 J 制定并发表论文汇刊信息理论、 IT-13 卷，第 260-269 页"错误边界为卷积码和渐近最优解码算法"，在 1967 年 4 月，维特比译码。