基于NTP协议的数字钟设计

针对大型公共场所需放置多台同步时钟的问题,提出了基于网络时间协议（NTP协议）的数字钟设计方案,利用嵌入式网络模块实现网络接口、美信的实时时钟芯片实现时钟的信息存储和更新、奥地利微电子的8通道恒流发光二极管（LED）驱动芯片实现时间显示。该基于NTP协议的数字钟定期向NTP服务器发送请求包,利用服务器的响应包的时间戳可以计算出本地客户机时间,修正客户机时间,使其时间与时间服务器的时间保持一致。该数字钟由于采用NTP网络协议,时间同步于NTP服务器,走时准确,安装方便。

Digital Clock Design Based on NTP Protocol

For the placement of multiple digital clocks in large public facilities,a digital clock based on NTP protocol is proposed.The embedded network module is used to accomplish network interface,the real-time clock chip from Maxim company to accomplish data storage and update,8-channel LED driver form Austriamicrosystems company to accomplish display.The digital clock based on NTP protocol sends periodically the request packet to NTP server and computes local time through NTP server response.With NTP time synchronization technique,the clock could keep precise time,and meanwhile,is convenient for installation.