07年的第一届浙江省大学生电子竞赛的时候做过交通灯程序，有盲人提示，倒数计时等 基于STC89C52 KEIL2编译环境-In 2007 the first college students in Zhejiang Province E-race traffic lights when the procedure done, there are blind suggest that the countdown to the compiler-based environment STC89C52