Hello
I am doing project with chipkit wi-fire but i am using Arduino IDE for programming it. I am using GPS module SKM53 with TinyGPS library to get latitude and longitude.
I am using the example form that library. Here is the code:
TinyGPS gps;
SoftwareSerial ss(1, 0);
static void smartdelay(unsigned long ms);
static void print_float(float val, float invalid, int len, int prec);
static void print_int(unsigned long val, unsigned long invalid, int len);
static void print_date(TinyGPS &gps);
static void print_str(const char *str, int len);
void setup()
{
Serial.begin(9600);
Serial.print("Testing TinyGPS library v. "); Serial.println(TinyGPS::library_version());
Serial.println("by Mikal Hart");
Serial.println();
Serial.println("Sats HDOP Latitude Longitude Fix Date Time Date Alt Course Speed Card Distance Course Card Chars Sentences Checksum");
Serial.println(" (deg) (deg) Age Age (m) --- from GPS ---- ---- to London ---- RX RX Fail");
Serial.println("-------------------------------------------------------------------------------------------------------------------------------------");
ss.begin(9600);
}
void loop()
{
float flat, flon;
unsigned long age, date, time, chars = 0;
unsigned short sentences = 0, failed = 0;
static const double LONDON_LAT = 51.508131, LONDON_LON = -0.128002;
print_int(gps.satellites(), TinyGPS::GPS_INVALID_SATELLITES, 5);
print_int(gps.hdop(), TinyGPS::GPS_INVALID_HDOP, 5);
gps.f_get_position(&flat, &flon, &age);
print_float(flat, TinyGPS::GPS_INVALID_F_ANGLE, 10, 6);
print_float(flon, TinyGPS::GPS_INVALID_F_ANGLE, 11, 6);
print_int(age, TinyGPS::GPS_INVALID_AGE, 5);
print_date(gps);
print_float(gps.f_altitude(), TinyGPS::GPS_INVALID_F_ALTITUDE, 7, 2);
print_float(gps.f_course(), TinyGPS::GPS_INVALID_F_ANGLE, 7, 2);
print_float(gps.f_speed_kmph(), TinyGPS::GPS_INVALID_F_SPEED, 6, 2);
print_str(gps.f_course() == TinyGPS::GPS_INVALID_F_ANGLE ? "*** " : TinyGPS::cardinal(gps.f_course()), 6);
print_int(flat == TinyGPS::GPS_INVALID_F_ANGLE ? 0xFFFFFFFF : (unsigned long)TinyGPS::distance_between(flat, flon, LONDON_LAT, LONDON_LON) / 1000, 0xFFFFFFFF, 9);
print_float(flat == TinyGPS::GPS_INVALID_F_ANGLE ? TinyGPS::GPS_INVALID_F_ANGLE : TinyGPS::course_to(flat, flon, LONDON_LAT, LONDON_LON), TinyGPS::GPS_INVALID_F_ANGLE, 7, 2);
print_str(flat == TinyGPS::GPS_INVALID_F_ANGLE ? "*** " : TinyGPS::cardinal(TinyGPS::course_to(flat, flon, LONDON_LAT, LONDON_LON)), 6);
gps.stats(&chars, &sentences, &failed);
print_int(chars, 0xFFFFFFFF, 6);
print_int(sentences, 0xFFFFFFFF, 10);
print_int(failed, 0xFFFFFFFF, 9);
Serial.println();
smartdelay(1000);
}
static void smartdelay(unsigned long ms)
{
unsigned long start = millis();
do
{
while (ss.available())
gps.encode(ss.read());
} while (millis() - start < ms);
}
static void print_float(float val, float invalid, int len, int prec)
{
if (val == invalid)
{
while (len-- > 1)
Serial.print('*');
Serial.print(' ');
}
else
{
Serial.print(val, prec);
int vi = abs((int)val);
int flen = prec + (val < 0.0 ? 2 : 1); // . and -
flen += vi >= 1000 ? 4 : vi >= 100 ? 3 : vi >= 10 ? 2 : 1;
for (int i=flen; i<len; ++i)
Serial.print(' ');
}
smartdelay(0);
}
static void print_int(unsigned long val, unsigned long invalid, int len)
{
char sz[32];
if (val == invalid)
strcpy(sz, "*******");
else
sprintf(sz, "%ld", val);
sz[len] = 0;
for (int i=strlen(sz); i<len; ++i)
sz[i] = ' ';
if (len > 0)
sz[len-1] = ' ';
Serial.print(sz);
smartdelay(0);
}
static void print_date(TinyGPS &gps)
{
int year;
byte month, day, hour, minute, second, hundredths;
unsigned long age;
gps.crack_datetime(&year, &month, &day, &hour, &minute, &second, &hundredths, &age);
if (age == TinyGPS::GPS_INVALID_AGE)
Serial.print("********** ******** ");
else
{
char sz[32];
sprintf(sz, "%02d/%02d/%02d %02d:%02d:%02d ",
month, day, year, hour, minute, second);
Serial.print(sz);
}
print_int(age, TinyGPS::GPS_INVALID_AGE, 5);
smartdelay(0);
}
static void print_str(const char *str, int len)
{
int slen = strlen(str);
for (int i=0; i<len; ++i)
Serial.print(i<slen ? str[i] : ' ');
smartdelay(0);
}
I am using 9600 baud for gps and 115200 for serial connection.
the output in 115200 baud rate is like this:
Testing TinyGPS library v. 13
by Mikal Hart
Sats HDOP Latitude Longitude Fix Date Time Date Alt Course Speed Card Distance Course Card Chars Sentences Checksum
(deg) (deg) Age Age (m) --- from GPS ---- ---- to London ---- RX RX Fail
------------------------------------------------------------------------------------------------------------------------------ÿ
after that it stops posting any value.
In 9600 baud rate the output of gps nmea code is displayed like this:
$GPGGA,173458.000,5133.4150,N,00014.8604,W,2,7,0.96,33.2,M,47.0,M,0000,000073
$GPGSA,A,3,14,25,19,24,02,29,31,,,,,,1.28,0.96,0.850C
$GPGSV,3,1,12,12,70,060,,25,69,263,23,14,49,275,24,24,41,128,3170
$GPGSV,3,2,12,49,30,173,35,29,21,192,32,19,20,043,17,06,19,061,77
$GPGSV,3,3,12,02,18,103,26,31,13,300,15,22,06,307,,03,02,357,72
$GPRMC,173458.000,A,5133.4150,N,00014.8604,W,0.00,154.96,070316,,,D72
$GPGGA,173459.000,5133.4150,N,00014.8604,W,2,7,0.96,33.2,M,47.0,M,0000,000072
$GPGSA,A,3,14,25,19,24,02,29,31,,,,,,1.28,0.96,0.850C
$GPGSV,3,1,12,12,70,060,,25,69,263,23,14,49,275,24,24,41,128,3170
$GPGSV,3,2,12,49,30,173,35,29,21,192,32,19,20,043,17,06,19,061,77
$GPGSV,3,3,12,02,18,103,27,31,13,300,14,22,06,307,,03,02,357,72
$GPRMC,173459.000,A,5133.4150,N,00014.8604,W,0.00,154.96,070316,,,D73
$GPGGA,173500.000,5133.4150,N,00014.8604,W,2,7,0.96,33.2,M,47.0,M,0000,00007F
$GPGSA,A,3,14,25,19,24,02,29,31,,,,,,1.28,0.96,0.850C
$GPGSV,3,1,12,12,70,060,,25,69,263,23,14,49,275,24,24,41,128,32*73
$GPGSV,3,2,12,49,30,173,35,29,21,192,32,19,20,043,16,06,19,061,76
$GPGSV,3,3,12,02,18,103,27,31,13,300,13,22,05,307,,03,02,357,76
$GPRMC,173500.000,A,5133.4150,N,00014.8604,W,0.00,154.96,070316,,,D7E
$GPGGA,173501.000,5133.4150,N,00014.8604,W,2,7,0.96,33.2,M,47.0,M,0000,00007E
Can anyone please help me fix or guide me to correct way in solving this problem?