使用keil平台与汇编编写的51单片机程序，可以执行电子时钟功能，可修改时间与设置闹钟，内含proteus仿真，验证通过。(The 51 microcontroller program written by keil platform and assembler can execute the function of electronic clock. It can modify the time and set the alarm clock, and contains proteus sim