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Add fixed point minute scaling back with correct floating point conversion.

This commit is contained in:
Tony DiCola 2014-08-11 11:01:50 -07:00
parent 7ca1d78daa
commit 240f1bbdea
2 changed files with 11 additions and 11 deletions
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16
Adafruit_GPS.cpp
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@ -72,9 +72,9 @@ boolean Adafruit_GPS::parse(char *nmea) {
p += 3; // skip decimal point
strncpy(degreebuff + 2, p, 4);
degreebuff[6] = '\0';
long minutes = atol(degreebuff) * 10;
long minutes = 50 * atol(degreebuff) / 3;
latitude_fixed = degree + minutes;
latitude = latitude_fixed / 100000.0F;
latitude = degree / 100000 + minutes * 0.000006F;
p = strchr(p, ',')+1;
if (p[0] == 'N') lat = 'N';
@ -92,9 +92,9 @@ boolean Adafruit_GPS::parse(char *nmea) {
p += 3; // skip decimal point
strncpy(degreebuff + 2, p, 4);
degreebuff[6] = '\0';
minutes = atol(degreebuff) * 10;
minutes = 50 * atol(degreebuff) / 3;
longitude_fixed = degree + minutes;
longitude = longitude_fixed / 100000.0F;
longitude = degree / 100000 + minutes * 0.000006F;
p = strchr(p, ',')+1;
if (p[0] == 'W') lon = 'W';
@ -151,9 +151,9 @@ boolean Adafruit_GPS::parse(char *nmea) {
p += 3; // skip decimal point
strncpy(degreebuff + 2, p, 4);
degreebuff[6] = '\0';
long minutes = atol(degreebuff) * 10;
long minutes = 50 * atol(degreebuff) / 3;
latitude_fixed = degree + minutes;
latitude = latitude_fixed / 100000.0F;
latitude = degree / 100000 + minutes * 0.000006F;
p = strchr(p, ',')+1;
if (p[0] == 'N') lat = 'N';
@ -171,9 +171,9 @@ boolean Adafruit_GPS::parse(char *nmea) {
p += 3; // skip decimal point
strncpy(degreebuff + 2, p, 4);
degreebuff[6] = '\0';
minutes = atol(degreebuff) * 10;
minutes = 50 * atol(degreebuff) / 3;
longitude_fixed = degree + minutes;
longitude = longitude_fixed / 100000.0F;
longitude = degree / 100000 + minutes * 0.000006F;
p = strchr(p, ',')+1;
if (p[0] == 'W') lon = 'W';

6
Adafruit_GPS.h
View File

@ -127,9 +127,9 @@ class Adafruit_GPS {
uint16_t milliseconds;
// Floating point latitude and longitude value in degrees.
float latitude, longitude;
// Fixed point latitude and longitude value in 1/100000 degrees.
// For example a latitude of 4,767.99916 degrees would have a value of 476799916.
// More precise than the floating point value, but a little more difficult to use.
// Fixed point latitude and longitude value with degrees stored in units of 1/100000 degrees,
// and minutes stored in units of 1/100000 degrees. See pull #13 for more details:
// https://github.com/adafruit/Adafruit-GPS-Library/pull/13
int32_t latitude_fixed, longitude_fixed;
float geoidheight, altitude;
float speed, angle, magvariation, HDOP;