上班，驾校，校园上课，计时刷卡系统。 功能实现了：开机显示时间，将接触式IC卡插入卡槽，输入密码，(可以将卡拔了)开始计时，再次插卡，计算时间，并将总时间写入卡内，当时间超过一定时长，需要将时间清0.-Work, driving school, school class, time card system. Functions to achieve: the boot display time, the contactless IC card into the slot, enter the