我替同学做的毕业设计！实现用LCD显示车速（mps和kmph两档）、里程、行驶时间以及超速报警的功能。硬件测试非常成功。希望对大家有帮助！-I on behalf of the graduating students to do the design! Realize the speed with LCD display (mps and two respectively kmph), mileage, driving time and speed alarm function. Hardwar