eda上机考试题 分享 包括分频计 计数器 等不同类型的题-eda-on exam questions to share, including frequency counter, count the different types of questions

智能风扇模拟系统，具有三个可调档位，摇头，自然风，常风，和睡眠风三种风。利用点阵模拟。-Intelligent fan analog system, with three adjustable stalls, shaking his head, natural wind, constant wind, and sleep wind three kinds of wind. Using lattice simulation.

FPGA -计数器，29减法计数器。使用verilog hdl编写格式，cyclone I 系列EP1C3TC144芯片。-FPGA programming using 29 down counter, using verilog hdl written format, cyclone I series EP1C3TC144 chips.