正弦波信号的产生,频率为1Hz,FPGA处理模块各部分所需工作时钟信号由输入系统时钟信号经分频得到，系统时钟输入端应满足输入脉冲信号的要求-generte sin wave, the frequence is 1Hz,FPGA processing module is required to work various parts of the system clock signal from the input clock signal by dividing the system clock