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北斗/GPS

时间:2016-02-29 12:22:31      阅读:841      评论:0      收藏:0      [点我收藏+]

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北斗/GPS都是用的nmea通用协议。

NMEA-0183协议定义的语句非常多,但是常用的或者说兼容性最广的语句只有$GPGGA、$GPGSA、$GPGSV、$GPRMC、$GPVTG、$GPGLL等。

 

GPRMC具体细节: 

/*
Format

  $GPRMC,123519,A,4807.038,N,01131.000,E,022.4,084.4,230394,003.1,W*6A
     |     |        | |             |             |       |     |        |       |
     |     |        | |             |             |       |     |        |       *6A Checksum data
     |     |        | |             |             |       |     |        |
     |     |        | |             |             |       |     |        003.1,W Magnetic Variation
     |     |        | |             |             |       |     |
     |     |        | |             |             |       |     230394 Date - 23rd of March 1994
     |     |        | |             |             |       |
     |     |        | |             |             |       084.4 Track angle in degrees
     |     |        | |             |             |       
     |     |        | |             |             022.4 Speed over the ground in knots
     |     |        | |             |
     |     |        | |             01131.000,E Longitude 11 deg 31.000‘ E
     |     |        | |
     |     |        | 4807.038,N Latitude 48 deg 07.038‘ N
     |     |        |
     |     |        A Status A=active or V=Void
     |     |
     |     123519 Fix taken at 12:35:19 UTC
     |
     RMC Recommended Minimum sentence C

*/

 

1、NMEA library
开源的NMEA library就够用了,而且至今也没发现有比这个更好的解析库
支持: GPGGA, GPGSA, GPGSV, GPRMC, GPVTG
跨平台,支持如下编译环境
  • Microsoft Windows (MS Visual Studio 8.0, GCC)
  • Windows Mobile, Windows CE (MS Visual Studio 8.0)
  • UNIX (GCC)

http://nmea.sourceforge.net/

有人建了个eclipse工程,这些库建工程很繁琐,偷懒无罪。

https://github.com/AHR-Project/nmealib

 

2、GPS Library

之前在cortex-m3上调过北斗并且在cortex-m4上调过GPS,也都是在网上找了个现成的解析实例,这种大众化的模块不用重复造轮子了。

Library 27- Read GPS data on STM32F4 devices

Features

  • Parse GPS data
  • Supported NMEA 0183 standard
  • Works with GPGGA, GPRMC, GPGSA, GPGSV NMEA statements
  • Version 1.1 – August 22, 2014
    • Calculate distance between 2 coordinates
    • Calculate bearing between 2 coordinates
  • Allows you to select custom NMEA statements

http://stm32f4-discovery.com/2014/08/library-27-gps-stm32f4-devices/

完整的库文件和工程在github

https://github.com/MaJerle/stm32f429

 

 

北斗/GPS

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原文地址:http://www.cnblogs.com/dong1/p/5226808.html

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