对和芯北斗定位模块，每秒吐出的定位数据做一定的过滤，每十个

数据采样一个数据，保存到flash；并实现通过U 盘按一定的格式将已保存的

数据导出，通过PC 工具将历史轨迹数据在地图上回放，实现对车辆轨迹的跟

踪和行车历史数据的记录。-Of beidou positioning module, a second s positioning data filtering, ten

Data sampling, a data saved to a flash　And implement through U disk in a certain format will be saved

Export data, through the PC tools the historical trajectory playback on the map data, realize the vehicle with the trajectory

Steps and driving history data record.