GPS模塊在打鈴控制器中的應(yīng)用

　　設(shè)計(jì)了基于GPS集成模塊和單片機(jī)最小系統(tǒng)的自動(dòng)校時(shí)打鈴控制器。單片機(jī)通過(guò)對(duì)GPS集成模塊E531的串行口進(jìn)行數(shù)據(jù)采集，得到實(shí)時(shí)格林威治時(shí)間，然后經(jīng)過(guò)時(shí)區(qū)調(diào)整轉(zhuǎn)換為標(biāo)準(zhǔn)北京時(shí)間。將其作為打鈴控制器的時(shí)間基準(zhǔn)對(duì)系統(tǒng)本地時(shí)鐘DS1302進(jìn)行校準(zhǔn)。在GPS有效捕獲衛(wèi)星信號(hào)時(shí)可以及時(shí)得到標(biāo)準(zhǔn)時(shí)間，當(dāng)GPS模塊捕獲衛(wèi)星信號(hào)失效時(shí)可以通過(guò)本地時(shí)鐘繼續(xù)工作，這樣既保持了時(shí)間的準(zhǔn)確性又保證了控制器工作的連續(xù)性。

　　Abstract:

　　Auto-timing ringing controller is designed based on GPS OEM module and SCM minimal system.MCU got the Greenwich time from E531 module.Then converted the time to Beijing time by adjusting the time zone. And the Beijing time calibrated the local chip DS1302. The controller based on the time of satellite when the GPS satellite signals received or the time of local chip when the GPS module can not receive satellite signals. In this way，it maintaines the accuracy of the controller’s time and ensures the continuity of it’s work.