This implementation is moderately memory efficient because it stores only the first Pi/2 radians of sine values. The second Pi/2 radians is a mirror image of the first in time and the second Pi radians is a mirror image in amplitude of the first Pi

基于博创实验箱UP-CUP-FPGA2C35-Ⅱ和Verilog HDL硬件描述语言，分为按键输入模块、LED指示灯模块及LCD显示模块，采用按键BTN1、BTN2作为输入端输入四位密码与事先设定的密码进行匹配，由D1、D2、D3、D4四盏LED灯来指示输入密码的位数。开机时，LCD显示“HELLO! WELCOME!Enter the code:当”，密码输入正确时，LED灯D7亮，同时在实验箱LCD显示屏上显示字符串“Good! Well done!you are right!!!”，当密码

带PI闭环测试生成的SPWM方案已通过测试，可以实现SPWM输出 -SPWM scheme with a PI closed-loop test generation has been tested, you can achieve SPWM output

使用AD9959实现倒pi的正弦功能，中频是60M -using AD9959 to output a sine with it s phase change