一个100MHZ的时钟信号经过分频器得到1HZ信号，然后输入到三位计数器中，计数器的输出在相应的FPGA上的LED灯上展示。该程序主要包含四部分：测试文件、顶层文件、分屏器模块和计数器模块。-100MHZ clock signal through a divider to get 1HZ signal, and then input to the three counters, the output of the counter displayed on the corresponding LED lights on the FPGA. The program consists of four main parts: the test file, the top-level file, split screen modules and counter module.