【摘要】 针对传统时钟走时不准,调校不方便的缺点,提出一种基于无线通信网及GPS的双时钟源授时系统设计,主机接收GPS卫星时间信号,通过无线通信网发送给所有子系统实现授时。为提高系统可靠性,设计DS12C887为主机备用时钟源,以备应急时使用,主机通过Internet网关接入互联网,实现远程控制及网络授时。系统硬件电路以STM8及STM32处理器为核心,使用CC1101射频通信模块构建无线通信网,设计无线通信协议及其组网策略,文章最后给出软件设计流程图。样机用于校园授时,控制打铃仪和万年历授时,运行稳定可靠。更多还原

【Abstract】 Aimed at of traditional timer adjustment inconvenient and timing misfit,this paper explains a system design based on radio network and GPS dual timing source,the host receives satellites timing signal then it is sent to all subsystem through radio network.In order to improve its reliability,design DS12C887 as the reserve timing source to prepare for emergency use for host,host connected to the internet is to realize remote control or timing through network by internet gateway.System hardware circuit takes STM8 and STM32 as core processor and uses CC1101 RF communication module to build a radio network,designed radio protocols and its networking strategy,finally this paper explains software designed flow.Prototype run stable and reliable for campus grant for bell control and calendar timing.更多还原