Arduino mega2560 和商城里的GPS 求助怎么显示经度和纬度
2015-11-031.3万
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本文介绍了如何使用Arduino Mega2560和GPS模块正确显示经纬度。通过TinyGPS库解析GPS数据，解决了经纬度显示为999999999的问题。文章提供了详细的代码示例和调试步骤，帮助用户快速定位并解决问题。
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本人已纠结于 从GPS获取经纬度 ，代码如下#include <TinyGPS.h> #include <LiquidCrystal.h> TinyGPS gps; long lat, lon; unsigned long fix_age, time, date, speed, course; unsigned long chars; unsigned short sentences, failed_checksum; int DEG; int MIN1; int MIN2; void LAT(){ //Latitude state DEG=lat/1000000; MIN1=(lat/10000)%100; MIN2=lat%10000; Serial.println("LAT:"); Serial.print(MIN1); Serial.print("."); Serial.print(MIN2); Serial.print("' "); Serial.println(" "); } void LON(){ //Longitude state DEG=lon/1000000; MIN1=(lon/10000)%100; MIN2=lon%10000; Serial.println("LON:"); Serial.print(DEG); Serial.print(MIN1); Serial.print("."); Serial.print(MIN2); Serial.print("' "); Serial.println(" "); } void setup() { Serial.begin(38400); //Set the GPS baud rate. delay(10000); } void loop() { while (Serial.available()) { int c = Serial.read(); // Read the GPS data if (gps.encode(c)) // Check the GPS data { gps.get_position(&lat, &lon, &fix_age); // process new gps info here } } gps.get_position(&lat, &lon, &fix_age); // retrieves +/- lat/long in 100000ths of a degree gps.get_datetime(&date, &time, &fix_age); // time in hhmmsscc, date in ddmmyy //LAT(); //LON(); Serial.println(lat); delay(1000); Serial.println(lon); } 输出结果如下，可是经度和纬度都是9999999999 哪位大神能说一下哪错了吗 $GPGSV,3,1,09,12,23,127,,14,33,274,25,15,31,073,26,18,87,266,25*72 $GPGSV,3,2,09,20,24,134,,21,31,210,21,22,46,307,34,24,66,063,27*75 $GPGSV,3,3,09,25,07,162,18*4C $GPGLL,4000.06376,N,11620.45307,E,111024.60,A,A*69 999999999 999999999 999999999 999999999 999999999 999999999 999999999 [img]file:///C:\Users\DELL\Documents\Tencent Files\2991299442\Image\C2C\3)K~HBT$U~$U%QJY2@_HX_Q.png[/img] |
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3)K~HBT$U~$U%QJY2@_HX_Q.png (17.86 KB, 下载次数: 6240)
LiquidCrystal lcd(8, 9, 4, 5, 6, 7);
#if defined(ARDUINO) && ARDUINO >= 100
#include "Arduino.h"
#define WireSend(args) Wire.write(args)
#define WireRead(args) Wire.read(args)
#define printByte(args) Serial.write(args)
#define printlnByte(args) Serial.write(args),Serial.println()
#else
#include "WProgram.h"
#define WireSend(args) Wire.send(args)
#define WireRead(args) Wire.receive(args)
#define printByte(args) Serial.print(args,BYTE)
#define printlnByte(args) Serial.println(args,BYTE)
#endif
#include
#define BUFFER_LENGTH 10//Define the buffer length
int GPSAddress = 0x42;//GPS I2C Address
double Datatransfer(char *data_buf,char num)//Data type converter：convert char type to float
{ //*data_buf:char data array ;num:float length
double temp=0.0;
unsigned char i,j;
if(data_buf[0]=='-')//负数的情况
{
i=1;
//数组中的字符型数据转换成整数并累加
while(data_buf[i]!='.')
temp=temp*10+(data_buf[i++]-0x30);
for(j=0;j
//将转换后的整数转换成浮点数
for(j=0;j
//转换成负数
temp=0-temp;
}
else//正数情况
{
i=0;
while(data_buf[i]!='.')
temp=temp*10+(data_buf[i++]-0x30);
for(j=0;j
for(j=0;j
}
return temp;
}
void rec_init()//initial GPS
{
Wire.beginTransmission(GPSAddress);
WireSend(0xff);//发送数据所在的地址
Wire.endTransmission();
Wire.beginTransmission(GPSAddress);
Wire.requestFrom(GPSAddress,10);//要求从GPS器件读取10个字节
}
char ID()//接收语句的ID
{
char i = 0;
char value[7]={
'$','G','P','G','G','A',',' };//要接收的GPS语句的ID内容
char buff[7]={
'0','0','0','0','0','0','0' };
while(1)
{
rec_init();//接收数据初始化
while(Wire.available())
{
buff[i] = WireRead();//接收串口的数据
if(buff[i]==value[i])//对比是否是正确的ID
{
i++;
if(i==7)
{
Wire.endTransmission();//结束接收
return 1;//接收完毕返回1
}
}
else
i=0;
}
Wire.endTransmission();//结束接收
}
}
void UTC()//获取时间信息
{
char i = 0,flag=0;
char value[7]={
'$','G','P','G','G','A',',' };
char buff[7]={
'0','0','0','0','0','0','0' };
char time[9]={
'0','0','0','0','0','0','0','0','0' };//存放时间数据
double t=0.0;
while(1)
{
rec_init();
while(Wire.available())
{
if(!flag)
{
buff[i] = WireRead();
if(buff[i]==value[i])
{
i++;
if(i==7)
{
i=0;
flag=1;
}
}
else
i=0;
}
else
{
time[i] = WireRead();
i++;
if(i==9)
{
t=Datatransfer(time,2);//转换成浮点型数据
t=t+80000.00;//将时间转换成北京时间
Serial.println(t);//输出时间数据
Wire.endTransmission();
return;
}
}
}
Wire.endTransmission();
}
}
void rec_data(char *buff,char num1,char num2)//接收数据子函数
{ //*buff：存放接收数据的数组；num1：逗号数目；num2：数组长度。
char i=0,count=0;
if(ID())
{
while(1)
{
rec_init();
while(Wire.available())
{
buff[i] = WireRead();
if(count!=num1)
{
if(buff[i]==',')
count++;
}
else
{
i++;
if(i==num2)
{
Wire.endTransmission();
return;
}
}
}
Wire.endTransmission();
}
}
}
float latitude()//获取纬度信息
{
char lat[10]={
'0','0','0','0','0','0','0','0','0','0' };//存放纬度数据
rec_data(lat,1 ,10);//接收纬度数据
Serial.println(Datatransfer(lat,5),5);//将纬度数据转换成浮点型数据并输出
return Datatransfer(lat,5);
}
void lat_dir()//获取纬度方向信息
{
char dir[1]={'0'};//存放纬度方向数据
rec_data(dir,2,1);//接收纬度方向数据
printlnByte(dir[0]);//将纬度方向信息输出
}
void longitude( )//获取经度信息
{
char lon[11]={
'0','0','0','0','0','0','0','0','0','0','0' };//存放经度数据
rec_data(lon,3,11);//接收经度数据
Serial.println(Datatransfer(lon,5),5);//将经度数据转换成浮点型数据并输出
lcd.print(Datatransfer(lon,5),5);
}
void lon_dir()//获取经度方向信息
{
char dir[1]={'0'};
rec_data(dir,4,1);
printlnByte(dir[0]);//将纬度方向信息输出
}
void altitude()//获取海拔信息
{
char i=0,count=0;
char alt[8]={
'0','0','0','0','0','0','0','0' };
if(ID())
{
while(1)
{
rec_init();
while(Wire.available())
{
alt[i] = WireRead();
if(count!=8)
{
if(alt[i]==',')
count++;
}
else
{
if(alt[i]==',')
{
Serial.println(Datatransfer(alt,1),1);
Wire.endTransmission();
return;
}
else
i++;
}
}
Wire.endTransmission();
}
}
}
void setup()
{
Wire.begin();//IIC初始化
Serial.begin(9600);//设置波特率
Serial.println("DFRobot DFRduino GPS Shield v1.0");
Serial.println("$GPGGA statement information: ");
lcd.begin(16,2);
}
void loop()
{
while(1)
{
//Serial.print("UTC:");
//UTC();
// Serial.print("Lat:");
// latitude();
// Serial.print("Dir:");
// lat_dir();
// Serial.print("Lon:");
// longitude();
// Serial.print("Dir:");
// lon_dir();
// Serial.print("Alt:");
// altitude();
// Serial.println(' ');
// Serial.println(' ');
lcd.begin(16, 2); // 开始
lcd.setCursor(0,0);
lcd.print(latitude());
Serial.println("++++++");
Serial.println(latitude());
}
}