基于MIPS平台的GPS高精度计时系统实现

随着GPS与嵌入式技术的发展,定时器Real-Time Clock（RTC）用于GPS内部计时功能的使用越来越广泛.提出了一种使用Sigma Designs推出的MIPS SOC SMP8654平台来实现基于linux操作系统下高精度守时系统.系统利用平台的I/O口来模拟I2C协议进行数据通信,实现了基于Linux下GPS RTC的整体架构以及模块,达到了GPS高精度守时的需要.

High Precision Timing System of GPS Based on MIPS Platform

With the development of GPS and embedded technology,the timer Real-Time Clock （RTC） for the GPS.internal timer function is used more and more widely.This paper presents a MIPS SOC SMP8654 platform using Sigma Designs to real- ize high precision timekeeping system based on Linux operating system.The system uses the I/O platform to simulate the I^2C protocol for data communication,and realizes the overall architecture of Linux GPS RTC and module based on GPS,can meet the demand of high precision punctual.