arduino GPS 经纬度解析（C语言）
第一篇，还不太会用这个，哈哈哈。
目录：
原始数据
GGA行提取
纬度提取
经度提取
原始数据
$GNGGA,085731.000,xxxx.xxxx,N,xxxxx.xxxx,E,1,16,0.9,27.8,M,0.0,M,4F
$GNGLL,3018.4819,N,12004.6687,E,085731.000,A,A49
$GPGSA,A,3,25,33,31,29,14,12,32,10,26,34,20,35,1.6,0.9,1.331
$BDGSA,A,3,07,09,10,06,1.6,0.9,1.326
$GPGSV,4,1,14,10,35,186,32,12,11,038,37,14,62,345,34,20,12,171,327F
$GPGSV,4,2,14,22,16,313,26,25,43,045,38,26,31,212,32,29,21,110,2977
$GPGSV,4,3,14,31,51,299,34,32,73,043,40,33,48,171,29,34,71,044,367A
$GPGSV,4,4,14,35,29,145,29,36,264B
$BDGSV,2,1,06,02,31,05,32,06,78,093,35,07,75,228,3361
$BDGSV,2,2,06,09,67,334,33,10,44,227,2264
$GNRMC,085731.000,A,xxxx.xxxx,N,xxxxx.xxxx,E,0.34,348.93,091218,A7F
$GNVTG,348.93,T,M,0.34,N,0.63,K,A24
$GNZDA,085731.000,09,12,2018,00,0041
$GPTXT,01,01,01,ANTENNA OK35
GGA行提取
#define GPSMAX 670 //GPS数据读取一次获得长度
#define GGA 70 //GGA长度
#define READBEGIN 600 //开始提取GPS长度
char gpsdata[GPSMAX]; //GPS数据提取
char read;
char gpsread[GGA]; //提取的GPS字符串
void GPSread() //GPS数据读取
{
int kk = 0;
if (gpsSerial.available()) {
gpsdata[i++] = (char)gpsSerial.read(); //读取每一个元素
if(i >= READBEGIN) {
int ii = 0;
while(ii < i){
if(ii+GPSMAX-READBEGIN < GPSMAX && gpsdata[ii] == 'G' && gpsdata[ii+1] == 'G' && gpsdata[ii+2] == 'A'){
//对GGA那一行进行提取
int tt = ii;
while(gpsdata[tt] != '\n'){
gpsread[kk++] = gpsdata[tt];
//Serial.print(gpsdata[tt]); //输出提取的GPS数据
tt++;
}
gpsread[kk+1] = '\n';
Serial.print('\n');
}
ii++;
}
memset(gpsdata, 0, GPSMAX);
i = 0;
} //clear info
}
}
结果：
16:52:28.855 -> $GNGGA,085229.000,xxxx.xxxx,N,xxxxx.xxxx,E,1,12,1.0,18.3,M,0.0,M,*43
16:52:29.856 -> $GNGGA,085230.000,xxxx.xxxx,N,xxxxx.xxxx,E,1,12,1.0,17.6,M,0.0,M,*4D
16:52:30.857 -> $GNGGA,085231.000,xxxx.xxxx,N,xxxxx.xxxx,E,1,12,1.0,16.9,M,0.0,M,*4F
16:52:31.852 -> $GNGGA,085232.000,xxxx.xxxx,N,xxxxx.xxxx,E,1,12,1.0,16.5,M,0.0,M,*4C
16:52:32.817 -> $GNGGA,085233.000,xxxx.xxxx,N,xxxxx.xxxx,E,1,12,1.0,15.8,M,0.0,M,*44
16:52:33.851 -> $GNGGA,085234.000,xxxx.xxxx,N,xxxxx.xxxx,E,1,12,1.0,15.1,M,0.0,M,*48
16:52:34.853 -> $GNGGA,085235.000,xxxx.xxxx,N,xxxxx.xxxx,E,1,12,1.0,15.0,M,0.0,M,*44
16:52:35.826 -> $GNGGA,085236.000,xxxx.xxxx,N,xxxxx.xxxx,E,1,12,1.0,13.2,M,0.0,M,*41
纬度提取
double wei
void weiduread() //纬度获取
{
int tt = 0;
while(gpsread[tt] != '\n'){
if (gpsread[tt] == 'N'){ //纬度提取 xx.xxxx
int j;
for (j = tt-2; gpsread[j] != ','; j--){
;
}
j++;
wei = (gpsread[j]-48)*10 + (gpsread[j+1]-48) + ((gpsread[j+2]-48)*10 + (gpsread[j+3]-48) + (gpsread[j+5]-48)/10.0 + (gpsread[j+6]-48)/100.0 + (gpsread[j+7]-48)/1000.0 + (gpsread[j+8]-48)/10000.0)/60.0;
Serial.println(wei);
}
else ;
}
tt++;
}
}
经度提取
double jing
void jingduread() //经度获取
{
int tt = 0;
while(gpsread[tt] != '\n'){
if (gpsread[tt] == 'E'){ //经度提取 xxx.xxxx
int j, k;
for (j = tt-2; gpsread[j] != ','; j--){
;
}
j++;
jing = (gpsread[j]-48)*100 + (gpsread[j+1]-48)*10 + (gpsread[j+2]-48);
jing = jing + ((gpsread[j+3]-48)*10 + (gpsread[j+4]-48) + (gpsread[j+6]-48)/10.0 + (gpsread[j+7]-48)/100.0 + (gpsread[j+8]-48)/1000.0 + (gpsread[j+9])/10000.0)/60.0;
Serial.println(jing);
}
}
else ;
}
tt++;
}
}
说明：很早写的，用过，稍微改了改，可能会有点问题。这种解析方式会不定时出现乱码，这是由于每次接收到的数据长度不一导致的，选择不同的宏定义长度会有不同的结果。当然，更好地方式便是去下载TinyGPS++.h库，网上找得到，引用也很简单，而且有速度、航向角等其他有用的数据，程序如下：
#include
double weiread()
{
return (gps.location.lat());
}
double jingread()
{
return (gps.location.lng());
}
double highread()
{
return(gps.altitude.value());
}
double degreeread()
{
return (gps.course.value());
}
double vread()
{
return (gps.speed.mps());
}
然后再返回到一个double类型就可以用啦！
参考资料
[1]: https://blog.csdn.net/Fourier_Legend/article/details/84107998
[2]: https://blog.csdn.net/Fourier_Legend/article/details/84107494
里面很详细！