万年历程序 本系统采用了以广泛使用的单片机技术为核心,软硬件结合,使硬件部分大为简化,提高了系统稳定性,并采用LED显示电路、键盘电路,使人机交互简便易行,此外结合音乐闹铃电路、看门狗和供电电路-Calendar program used the system widely used in single-chip technology as the core, software and hardware combination, so that greatly simplified hardwa