Diff: GPS/NMEA.h

Revision:

44:0d72a8a1288a

--- /dev/null	Thu Jan 01 00:00:00 1970 +0000
+++ b/GPS/NMEA.h	Mon Jan 07 16:47:33 2019 +0000
@@ -0,0 +1,125 @@
+/* NMEA - a small NMEA-parsing library based on TinyGPS
+
+  TinyGPS - a small GPS library for Arduino providing basic NMEA parsing
+  Copyright (C) 2008-9 Mikal Hart
+  All rights reserved.
+
+  This library is free software; you can redistribute it and/or
+  modify it under the terms of the GNU Lesser General Public
+  License as published by the Free Software Foundation; either
+  version 2.1 of the License, or (at your option) any later version.
+
+  This library is distributed in the hope that it will be useful,
+  but WITHOUT ANY WARRANTY; without even the implied warranty of
+  MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
+  Lesser General Public License for more details.
+
+  You should have received a copy of the GNU Lesser General Public
+  License along with this library; if not, write to the Free Software
+  Foundation, Inc., 51 Franklin St, Fifth Floor, Boston, MA  02110-1301  USA
+
+  Ported to mbed by Michael Shimniok
+*/
+
+#ifdef __MBED__
+#include "mbed.h"
+#endif
+
+#include <stdint.h>
+#include <ctype.h>
+#include "GPS.h"
+
+#ifndef __NMEA_h
+#define __NMEA_h
+
+#define _GPS_VERSION 9 // software version of this library
+#define _GPS_MPH_PER_KNOT 1.15077945
+#define _GPS_MPS_PER_KNOT 0.51444444
+#define _GPS_KMPH_PER_KNOT 1.852
+#define _GPS_MILES_PER_METER 0.00062137112
+#define _GPS_KM_PER_METER 0.001
+
+/** An library parsing for parsing select NMEA-0183 sentences
+ * @author Michael Shimniok
+ */
+class NMEA: public GPS {
+public:
+    typedef uint8_t byte;
+
+    /** Create a new GPS parsing object for parsing NMEA sentences
+     */
+    NMEA();
+
+    /** Parse a single character received from GPS
+     *
+     * @param c is the character received from the GPS
+     * @returns 1 when all sentences received
+     */
+    virtual int parse(char c);
+
+#ifndef _GPS_NO_STATS
+    void stats(unsigned long *chars, unsigned short *good_sentences, unsigned short *failed_cs);
+#endif
+
+    /** determine if all sentences parsed
+     *
+     */
+    inline bool ready() {
+        if (_rmc_ready && _gga_ready) {
+            _rmc_ready = _gga_ready = false;
+            return true;
+        } else {
+            return false;
+        }
+    }
+
+    /** Reset the ready flags for all the parsed sentences
+     */
+    inline void reset_ready() { _rmc_ready = _gga_ready = false; }
+
+    enum {GPS_INVALID_AGE = 0xFFFFFFFF, GPS_INVALID_ANGLE = 999999999, GPS_INVALID_ALTITUDE = 999999999, GPS_INVALID_DATE = 0,
+      GPS_INVALID_TIME = 0xFFFFFFFF, GPS_INVALID_SPEED = 999999999, GPS_INVALID_FIX_TIME = 0xFFFFFFFF};
+
+private:
+    enum {_GPS_SENTENCE_GPGGA=0x10, _GPS_SENTENCE_GPRMC=0x20, _GPS_SENTENCE_GPGSV=0x40, _GPS_SENTENCE_OTHER=0};
+
+    // properties
+    int _new_time;
+    int _new_hour;
+    int _new_minute;
+    int _new_second;
+    int _new_date;
+    int _new_month;
+    int _new_year;
+    double _new_latitude;
+    double _new_longitude;
+    long _altitude;
+    float _new_altitude;
+    float _new_speed;
+    float _new_course;
+    float _new_hdop;
+    unsigned int _new_sat_count;
+    unsigned long _last_time_fix, _new_time_fix;
+    unsigned long _last_position_fix, _new_position_fix;
+
+    // parsing state variables
+    byte _parity;
+    bool _is_checksum_term;
+    char _term[15];
+    byte _sentence_type;
+    byte _term_number;
+    uint8_t  _term_offset;
+    bool _gps_data_good;
+    bool _rmc_ready;
+    bool _gga_ready;
+
+    double parse_degrees();
+    int from_hex(char a);
+    int parse_int();
+    double parse_decimal();
+    bool term_complete();
+    bool gpsisdigit(char c) { return c >= '0' && c <= '9'; }
+    int gpsstrcmp(const char *str1, const char *str2);
+};
+
+#endif