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-rw-r--r--plugin_gps.c725
1 files changed, 725 insertions, 0 deletions
diff --git a/plugin_gps.c b/plugin_gps.c
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--- /dev/null
+++ b/plugin_gps.c
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+/* $Id: plugin_gps.c 1136 2010-11-28 16:07:16Z mzuther $
+ * $URL: https://ssl.bulix.org/svn/lcd4linux/trunk/plugin_gps.c $
+ *
+ * gps plugin (nmea), code by michu / www.neophob.com, based on nmeap, http://sourceforge.net/projects/nmeap/
+ *
+ * Copyright (C) 2007 Michu - http://www.neophob.com
+ * Copyright (C) 2004, 2005, 2006, 2007 The LCD4Linux Team <lcd4linux-devel@users.sourceforge.net>
+ *
+ * This file is part of LCD4Linux.
+ *
+ * LCD4Linux is free software; you can redistribute it and/or modify
+ * it under the terms of the GNU General Public License as published by
+ * the Free Software Foundation; either version 2, or (at your option)
+ * any later version.
+ *
+ * LCD4Linux 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 General Public License for more details.
+ *
+ * You should have received a copy of the GNU General Public License
+ * along with this program; if not, write to the Free Software
+ * Foundation, Inc., 675 Mass Ave, Cambridge, MA 02139, USA.
+ *
+ */
+
+/*
+ * GPS Plugin for lcd4linux, by michael vogt / http://www.neophob.com
+ * contact: michu@neophob.com
+ *
+ * based on nmeap by daveh, http://www.dmh2000.com/ or http://sourceforge.net/projects/nmeap/
+ * you need a compiled libnmeap to compile this plugin.
+ *
+ * History:
+ * v0.1 -initial release
+ * v0.2 -fix include files, include <termios.h> and <asm/fcntl.h> (embedded devices)
+ * -fixed emulation mode (read only x bytes instead of the whole emulated nmea data)
+ * -improved error handling (if there are no parameters defined, lcd4linx will display "GPS ARG ERR")
+ * -display raw nmea string from the gps receiver
+ * -added support for gps device with 9600 baud (env. variable)
+ * -added the option that the widget graps data from the buffer and not from the gps device (usefull for multible widgets)
+ * v0.3 -improved nmea parsing
+ * -improved gps-emulator
+ * -time is now updated with rmc and gga sentence
+ *
+ * TODO:
+ * -update direction only when speed > 5 kmh
+ * -add more data fields
+ * -dump nmea string to external file
+ *
+ * Exported functions:
+ * int plugin_init_gps (void) - default plugin initialisation
+ * void parse(SHOW-OPTIONS, DISPLAY-OPTIONS)
+ * display option define, what the plugin should display
+ *
+ * OPTION: EXAMPLE:
+ * ------- --------
+ *
+ * PARAMETER 1:
+ * #define SHOW_ALTITUDE 0x000000001 alt:500
+ * #define SHOW_SPEED 0x000000010 spd:30
+ * #define SHOW_COURSE 0x000000100 dir:NO
+ * #define SHOW_SATELLITES 0x000001000 sat:4
+ * #define SHOW_QUALITY 0x000010000 qua:1
+ * #define SHOW_STATUS 0x000100000 sta:V
+ * #define SHOW_TIME_UTC 0x001000000 utc:113459
+ * #define SHOW_DATE 0x010000000 dat:190204 (19.02.2004)
+ *
+ * PARAMETER 2:
+ * #define OPTION_NO_PREFIX 0x000000001 disable prefix (example, instead of "alt:500" it displays "500"
+ * #define OPTION_SPEED_IN_KNOTS 0x000000010 when use the SHOW_SPEED option, display speed in knots instead in km/h
+ * #define OPTION_RAW_NMEA 0x000000100 outputs the parsed nmea string, only valid when EMULATE is not defined!
+ * #define OPTION_GET_BUFFERDATA 0x000001000 when you define more than 1 gps widget
+ * each widget will get updates and cause some ugly side effects, specially when you display the time
+ * by enabling this option, the widget will not read any nmea data from the serial port.
+ * KEEP IN MIND that there must be ONE widget which get buffered data (means read data from the port)
+ *
+ * #define SHOW_NMEA_STATUS 0x010000000 OK:0033/Error:0002/Incomplete:0002
+ *
+ *
+ * Examples:
+ * - gps::parse('0x011','0') will display the altitude and speed -> alt:500 spd:43
+ * - gps::parse('0x01100','0') will display the course and the numbers of satellites -> dir:NO sat:3
+ * - gps::parse('0x01','0x01') will display the speed without prefix -> 50
+ * - gps::parse('0x01','0x01') will display the speed in knots without prefix -> 27
+ *
+ * ENV VARIABLES
+ * To finetune plugin_gps you may define some env variables:
+ * GPS_PORT gps device, default value is /dev/usb/tts/1
+ * GPS_9600 serial port speed, default is 4800 baud, if you define this var speed will be 9600 (export GPS_9600=dummy)
+ */
+
+
+/* define the include files you need */
+#include "config.h"
+
+#include <stdio.h>
+#include <stdlib.h>
+#include <string.h>
+#include <ctype.h>
+#include <unistd.h>
+#include <termios.h> //used for serial port flags
+#include <asm/fcntl.h>
+
+
+/* these should always be included */
+#include "debug.h"
+#include "plugin.h"
+
+#ifdef WITH_DMALLOC
+#include <dmalloc.h>
+#endif
+
+#include "nmeap.h"
+
+//#define EMULATE //remove comment to enable gps data emulation...
+#define EMU_BUFFER_READ_SIZE 128 //how many bytes are read each loop aka emulation speed
+#define BUFFER_SIZE 256
+
+#define SHOW_ALTITUDE 0x000000001
+#define SHOW_SPEED 0x000000010
+#define SHOW_COURSE 0x000000100
+#define SHOW_SATELLITES 0x000001000
+#define SHOW_QUALITY 0x000010000
+#define SHOW_STATUS 0x000100000
+#define SHOW_TIME_UTC 0x001000000
+#define SHOW_DATE 0x010000000
+
+#define OPTION_NO_PREFIX 0x000000001
+#define OPTION_SPEED_IN_KNOTS 0x000000010
+#define OPTION_RAW_NMEA 0x000000100 //outputs the parsed nmea string, only valid when EMULATE is not defined!
+#define OPTION_GET_BUFFERDATA 0x000001000 //when you define more than 1 gps widget
+ //each widget will get updates and cause some ugly side effects, specially when you display the time
+ //by enabling this option, the widget will not read any nmea data from the serial port.
+ //KEEP IN MIND that there must be ONE widget which does not get buffered data (means read data from the port)
+#define OPTION_DEBUG 0x000010000
+#define SHOW_NMEA_STATUS 0x010000000
+
+static float course = 0.f; //degrees
+static float altitude = 0.f;
+static float speed = 0.f; //Speed over ground in KNOTS!!
+static int satellites = 0; //Number of satellites in use (00-12)
+static int quality = 0; //GPS quality indicator (0 - fix not valid, 1 - GPS fix, 2 - DGPS fix)
+static char gpsStatus = 'V'; //A=active or V=Void
+static unsigned long gpsTime = 0; //UTC of position fix in hhmmss format
+static unsigned long gpsDate = 0; //Date in ddmmyy format
+
+static int msgCounter = 0; //parsed nmea-sentence
+static int errCounter = 0; //parsed error nmea-sentence
+static int incomplCounter = 0; //incomplete parsed nmea-sentence
+/* ---------------------------------------------------------------------------------------*/
+/* STEP 1 : allocate the data structures. be careful if you put them on the stack because */
+/* they need to be live for the duration of the parser */
+/* ---------------------------------------------------------------------------------------*/
+static nmeap_context_t nmea; /* parser context */
+static nmeap_gga_t gga; /* this is where the data from GGA messages will show up */
+static nmeap_rmc_t rmc; /* this is where the data from RMC messages will show up */
+static int user_data; /* user can pass in anything. typically it will be a pointer to some user data */
+
+static int fd_g; /* port handler */
+static unsigned int emu_read_ofs = 0;
+static int debug = 0; //debug flag
+
+static char Name[] = "plugin_gps.c";
+
+static int fndStr = 0; //how many bytes were saved from the last read
+static char backBuffer[BUFFER_SIZE]; //the buffer to save incomplete nmea strings
+
+
+#ifdef EMULATE
+char test_vector[] = {
+/* "$GPGGA,123519,3929.946667,N,11946.086667,E,1,08,0.9,545.4,M,46.9,M,,*4A\r\n" // good
+ "$xyz,1234,asdfadfasdfasdfljsadfkjasdfk\r\n" // junk
+ "$GPRMC,225446,A,4916.45,N,12311.12,W,000.5,054.7,191194,020.3,E*68\r\n" // good
+ "$GPRMC,225446,A,4916.45,N,12311.12,W,000.5,054.7,191194,020.3,E*48\r\n" // checksum error
+ "$GPRMC,165110.000,A,5601.0318,N,01211.3503,E,0.09,28.11,190706,,*35\r\n" //some more data
+ "$GPGGA,165111.000,5601.0318,N,01211.3503,E,1,07,1.2,22.3,M,41.6,M,,0000*65\r\n"
+ "$GPRMC,165111.000,A,5601.0318,N,01211.3503,E,0.08,43.53,190706,,*3E\r\n"
+ "$GPGGA,165112.000,5601.0318,N,01211.3503,E,1,07,1.2,22.3,M,41.6,M,,0000*66\r\n"
+ "$GPRMC,165112.000,A,5601.0318,N,01211.3503,E,0.08,37.38,190706,,*33\r\n"
+ "$GPGGA,165113.000,5601.0318,N,01211.3503,E,1,07,1.2,22.4,M,41.6,M,,0000*60\r\n"
+ "$GPRMC,165113.000,A,5601.0318,N,01211.3503,E,0.11,21.03,190706,,*35\r\n"
+ "$GPGGA,165114.000,5601.0318,N,01211.3504,E,1,07,1.2,22.6,M,41.6,M,,0000*62\r\n"
+ "$GPRMC,165114.000,A,5601.0318,N,01211.3504,E,0.08,45.67,190706,,*3D\r\n"
+ "$GPGGA,165115.000,5601.0318,N,01211.3504,E,1,07,1.2,22.7,M,41.6,M,,0000*62\r\n"
+ "$GPRMC,165115.000,A,5601.0318,N,01211.3504,E,0.10,59.41,190706,,*3C\r\n"
+ "$GPGGA,165116.000,5601.0318,N,01211.3504,E,1,07,1.2,22.8,M,41.6,M,,0000*6E\r\n"
+ "$GPRMC,165116.000,A,5601.0318,N,01211.3504,E,0.06,50.22,190706,,*34\r\n"
+ "$GPGGA,165117.000,5601.0318,N,01211.3505,E,1,07,1.2,22.9,M,41.6,M,,0000*6F\r\n"
+ "$GPRMC,165117.000,A,5601.0318,N,01211.3505,E,0.08,45.32,190706,,*3F\r\n"
+ "$GPGGA,165118.000,5601.0318,N,01211.3505,E,1,07,1.2,23.0,M,41.6,M,,0000*68\r\n"
+ "$GPRMC,165118.000,A,5601.0318,N,01211.3505,E,0.10,37.49,190706,,*30\r\n"*/
+ "$GPGGA,165119.000,5601.0318,N,01211.3504,E,1,06,1.2,23.0,M,41.6,M,,0000*69\r\n"
+ "$GPRMC,165119.000,A,5601.0318,N,01211.3504,E,0.08,27.23,190706,,*34\r\n"
+ "$GPGGA,165120.000,5601.0318,N,01211.3504,E,1,07,1.2,23.0,M,41.6,M,,0000*62\r\n"
+ "$GPRMC,165120.000,A,5601.0318,N,01211.3504,E,0.08,41.52,190706,,*38\r\n"
+ "$GPGGA,165121.000,5601.0319,N,01211.3505,E,1,07,1.2,23.1,M,41.6,M,,0000*62\r\n"
+ "$GPRMC,165121.000,A,5601.0319,N,01211.3505,E,0.09,57.19,190706,,*30\r\n"
+ "$GPGGA,165122.000,5601.0319,N,01211.3505,E,1,07,1.2,23.2,M,41.6,M,,0000*62\r\n"
+ "$GPRMC,165122.000,A,5601.0319,N,01211.3505,E,0.10,30.60,190706,,*34\r\n"
+ "$GPGGA,165123.000,5601.0319,N,01211.3505,E,1,07,1.2,23.3,M,41.6,M,,0000*62\r\n"
+ "$GPRMC,165123.000,A,5601.0319,N,01211.3505,E,0.07,45.49,190706,,*3A\r\n"
+ "$GPGGA,165124.000,5601.0319,N,01211.3505,E,1,07,1.2,23.4,M,41.6,M,,0000*62\r\n"
+ "$GPRMC,165124.000,A,5601.0319,N,01211.3505,E,0.09,34.85,190706,,*35\r\n"
+ "$GPGGA,165125.000,5601.0319,N,01211.3506,E,1,07,1.2,23.4,M,41.6,M,,0000*60\r\n"
+ "$GPRMC,165125.000,A,5601.0319,N,01211.3506,E,0.06,43.06,190706,,*33\r\n"
+ "$GPGGA,165126.000,5601.0319,N,01211.3506,E,1,07,1.2,23.4,M,41.6,M,,0000*63\r\n"
+ "$GPRMC,165126.000,A,5601.0319,N,01211.3506,E,0.10,37.63,190706,,*37\r\n"
+ "$GPGGA,165127.000,5601.0319,N,01211.3505,E,1,07,1.2,23.4,M,41.6,M,,0000*61\r\n"
+ "$GPRMC,165127.000,A,5601.0319,N,01211.3505,E,0.07,42.23,190706,,*35\r\n"
+ "$GPGGA,165128.000,5601.0319,N,01211.3505,E,1,07,1.2,23.4,M,41.6,M,,0000*6E\r\n"
+ "$GPRMC,165128.000,A,5601.0319,N,01211.3505,E,0.09,27.98,190706,,*37\r\n"
+ "$GPGGA,165129.000,5601.0319,N,01211.3505,E,1,07,1.2,23.3,M,41.6,M,,0000*68\r\n"
+ "$GPRMC,165129.000,A,5601.0319,N,01211.3505,E,0.08,51.89,190706,,*36\r\n"
+ "$GPGGA,165130.000,5601.0319,N,01211.3505,E,1,07,1.2,23.2,M,41.6,M,,0000*61\r\n"
+ "$GPRMC,094055.000,A,5409.998645,N,00859.370546,E,0.044,0.00,301206,,,A*55\r\n"
+ "$GPGGA,094056.000,5409.998657,N,00859.370528,E,1,12,0.82,-5.168,M,45.414,M,,*47\r\n"
+ "$GPRMC,094056.000,A,5409.998657,N,00859.370528,E,0.263,0.00,301206,,,A*5A\r\n"
+ "$GPGGA,094057.000,5409.998726,N,00859.370512,E,1,12,0.82,-5.171,M,45.414,M,,*40\r\n"
+ "$GPRMC,094057.000,A,5409.998726,N,00859.370512,E,0.311,0.00,301206,,,A*51\r\n"
+ "$GPGGA,094058.000,5409.998812,N,00859.370518,E,1,12,0.82,-5.172,M,45.414,M,,*4E\r\n"
+ "$GPRMC,094058.000,A,5409.998812,N,00859.370518,E,0.423,0.00,301206,,,A*5A\r\n"
+ "$GPGGA,094059.000,5409.998934,N,00859.370505,E,1,12,0.82,-5.177,M,45.414,M,,*43\r\n"
+ "$GPRMC,094059.000,A,5409.998934,N,00859.370505,E,0.576,0.00,301206,,,A*53\r\n"
+ "$GPGGA,094100.000,5409.999097,N,00859.370542,E,1,12,0.82,-5.177,M,45.414,M,,*4C\r\n"
+ "$GPRMC,094100.000,A,5409.999097,N,00859.370542,E,0.705,0.00,301206,,,A\r\n"
+ "$GPGGA,004037.851,0000.0000,N,00000.0000,E,0,00,50.0,0.0,M,0.0,M,0.0,0000*7A\r\n"
+ "$GPGGA,175218.255,4657.3391,N,00726.2666,E,1,04,9.0,568.6,M,48.0,M,0.0,0000*7B\r\n"
+ "$GPGSA,A,3,26,29,17,12,,,,,,,,,9.5,9.08\r\n"
+ "$GPRMC,175218.255,A,4657.3391,N,00726.2666,E,0.$GPGGA,175219.255,4657.3391,N,00726.2666,E,1,04,9.0,568.5,M,48.0,M,0.0,0000*79\r\n"
+ "$GPGSA,A,3,26,29,17,12,,,,,,,,,9.5,9.0,2.7*38\r\n"
+ "$7,,*06\r\n"
+ "$GPGGA,175220.255,4657.3392,N,00726.2667,E,1,04,9.0,568.4,M,48.0,M,0.0,0000*70\r\n"
+ "$GPGSA,A,3,26,29,17,12,,,,$GPGGA,175221.255,4657.3392,N,00726.2667,E,1,04,9.0,568.3,M,48.0,M,0.0,0000*76\r\n"
+ "$GPGSA,A,3,26,29,17,12,,,,,,,,,9.5,9.0,2.7*38\r\n"
+ "$GPRMC,175221.255,A,4657.3392,N,00726.2667,E,0.14,150.24,230507,,*0A\r\n"
+ "$GPGGA,175222.255,4657.3393,N,00726.2668,E,1,04,9.0,568,29,17,12,,,,,,,,,9.5,9.0,2.7*38\r\n"
+ "$GPGSV,2,1,08,26,71,153,45,29,60,14$GPGGA,175223.255,4657.3393,N,00726.2669,E,1,04,9.0,568.2,M,48.0,M,7.3393,N,00726.2669,E,0.11,141.32,230507,,*05\r\n"
+ "$GPGGA,175224.255,4657.3394,N,00726.2670,E,1,04,9.0,568.0,M,48.0,M,0.0,0000*70\r\n"
+ "$GPGSA,$GPGGA,175225.255,4657.3395,N,00726.2670,E,1,04,9.0,567.8,M,48.0,M,0.0,0000*77\r\n"
+ "$GPGSA,A,3,26,29,17,12,,,,,,,,,9.5,9.0,2.7*38\r\n"
+ "$GPRMC,175225.255,A,4657.3395,N,00726.2670,E,0.10,146.99,230507,,*0A\r\n"
+ "$GPGGA,175226.255,465567.5,M,48.0,M,0.0,0000*7B\r\n"
+ "$GPGSA,A,3,26,29,17,12$GPGGA,175227.255,4657.3397,N,00726.2671,E,1,04,9.0,567.1,M,48.0,M,0.0,0000*7F\r\n"
+ "$.7*38\r\n"
+ "$GPGSV,2,1,08,26,71,153,46,29,60,149,46,09,55,286,00,28,32,051$GPGGA,175228.254,4657.3399,N,00726.2672,E,1,04,9.0,566.8,M,48.0,M,0.0,0000*74\r\n"
+ "$GPGSA,A,3,26,29,17,12,,,,,,,,,9.72,E,0.12,146.43,230507,,*0D\r\n"
+ "$GPGGA,175229.254,4657.3400,N,00726.2673,E,1,04,9.0,566.4,M,48.0,M,0.0,0000*7F\r\n"
+ "$GPGSA,A,3,26,29,17,1$GPGGA,175230.254,4657.3401,N,00726.2675,E,1,04,9.0,566.0,M,48.0,M,0.0,0000*74\r\n"
+ "$GPGSA,A,3,26,29,17,12$GPGGA,175231.254,4657.3402,N,00726.2676,E,1,04,9.0,565.7,M,48.0,M,0.0,0000*71\r\n"
+ "$GPGSA,A,3,26,29,17,12,,,,,,,,,9.5,9.0,2.7*38\r\n"
+ "$GPRMC,175231.2$GPGGA,175232.254,4657.3404,N,00726.2677,E,1,04,9.,153,45,29,60,149,46,09,55,286,00,28,32,051,00*7F\r\n"
+ "$GPGSV,2,2,08,17,32,102,38,18,28,298,00,12,12,21$GPGGA,175233.254,4657.3405,N,00726.2678,E,1,04,9.0,565.1,M,48.0,M,0.0,0000*7C\r\n"
+ "$GPGSA,A,3,26,29,17,12,,,,,,,,,9.5,9.0,2.6*39\r\n"
+ "$,*09\r\n"
+ "$GPGGA,175234.254,4657.3406,N,00726.2679,E,1,04,9.0,564.9,M,48.0,M,0.0,0000*70\r\n"
+ "$GPGSA,A,3,26,29,17,12,,,,,,,,,9.5,9.0,2.6*39\r\n"
+ "$GPRMC,175234.254,A,4657.3$GPGGA,175235.254,4657.3408,N,00726.2680,E,1,04,9.00,M,0.0,0000*76\r\n"
+ "$GPGSA,A,3,26,$GPGGA,175236.254,439\r\n"
+ "$GPRMC,175236.254,A,4657.3409,N,00726.2681,E,0.14,142.56,230507,,*06\r\n"
+ "$GPGGA,175237.254,4657.3410,N,00726.2682,E,1,04,9.0,564.5,M,48.0,M,0.0,0000*7C\r\n"
+ "$GPGSA,A,3,26,29,17,12,,,,00,28,32,051,00*7F\r\n"
+ "$GPGSV,2,2,08,17,32,102,39,18,28,298,00,12,12,218,35,22,09,3$GPGGA,175238.254,4657.3411,N,00726.2682,E,1,04$GPGGA,175239.254,4657.3412,N,00726.2683,E,1,04,9.0,564.7,M,48.0,M,0.0,0000*73\r\n"
+ "$GPGSA,A,3,26,29,17,12,,,,,,,,,9.5,9.0,2.6*39\r\n"
+ "$GPRMC,175239.254,A,4657.3412,N$GPGGA,175240.254,4657.3412,N,00726.2684,E,1,04,9.0,564.8,M,48.0,M,0.0,0000*75\r\n"
+ "$GPGSA,A,3,26,29,17,12,,,,,,,,,9.5,9.0,2.6*39\r\n"
+ "$GPRMC,$GPGGA,175241.254,4657.3413,N,00726.2684,E,1,04,9.0,565.1,M,48.0,M,0.0,0000*7D\r\n"
+ ",,,,,,,,9.5,9.0,2.6*39\r\n"
+ "$GPRMC,175241.254,A,4657.3413,N,00726.2684,E,0.$GPGGA,175242.254,4657.3413,N,00726.2684,E,1,04,9.0,565.3,M,48.0,M,0.0,0000*7C\r\n"
+ "$GPGSA,A,3,26,29,179,60,149,46,09,55,286,00,28,32,051,00*7C\r\n"
+ "$GPGS$GPGGA,175243.254,4657.3414,N,00726.2685,E,1,04,9.0,565.7,M,48.0,M,0.0,0000*7F\r\n"
+ "$GPGSA,A,3$GPGGA,175244.253,4657.3414,N,00726.2685,E,1,04,9.0,566.0,M,48.0,M,0.0,0000*7B\r\n"
+ "$GPGSA,A,3,26,29,17,12,,,,,,,,,9.5,9.0,2.6*39\r\n"
+ "$GPGGA,175245.253,4657.3415,N,00726.2685,E,1,04,9.0,566.3,M,48.0,M,0.0,0000*78\r\n"
+ "$GPGSA,A,3,26,29,17,12,,,,,,,,,9.5,9.0,2.6*39\r\n"
+ "$GPRMC,175245.253,A,4657.3415,N,00726.2685,E,0.2$GPGGA,175246.253,4657.3415,N,00726.2686,E,1,04,9.0,566.5,M,48.0,M,0.0,0000*7E\r\n"
+ ",175246.253,A,4657.3415,N,00726.2686,E,0.13,145$GPGGA,175247.253,4657.3416,N,00726.2686,E,1,04,9.0,566.8,M,48.0,M,0.0,0000*71\r\n"
+ "$GPGSA,A,3,26,17,32,101,39*7D\r\n"
+ "$GPGSV,2,2,08,28,32,051,00,18,$GPGGA,175248.253,4657.3417,N,00726.2686,E,1,04,9.0,567.0,M,48.0,M,0.0,0000*76\r\n"
+ "$GPGSA,A,3,26,29$GPGGA,175249.253,4657.3417,N,00726.2686,E,1,04.3,M,48.0,M,0.0,0000*7$GPGGA,175250.253,4657.3418,N,00726.2686,E,1,04,9.0,567.4,M,48.0,M,0.0,0000*74\r\n"
+ ".5,9.0,2.6*39\r\n"
+ "$GPRMC,175250.253,A,4657.3$GPGGA,175251.253,4657.3418,N,00726.2687,E,1,04,9.0,567.5,M,48.0,M,0.0,0000*75\r\n"
+ "$GPGSA,A,3,26,29,17,12,,,,,,,,,9.5,9.0,2.6*39\r\n"
+ ".2687,E,0.14,146.26,230507,,*05\r\n"
+ "$GPGGA,175252.253,4657.,00,18,28,298,00,12,12,218,36,22,09,326,00*7E\r\n"
+ "$GPRMC,175252.253,A,4657.3419,N,04,9.0,567.9,M,48.0,M,0.0,0000*7A\r\n"
+ "$GPGSA,A,3,26,29,17,12,,,,,,,,,9.5,9.0,2.6*39\r\n"
+ "$GPRMC,175253.253,A,4657.$GPGGA,175254.253,4657.3420,N,00726.2687,E,1,0417,12,,,,,,,,,9.5,9.0,2.6*39\r\n"
+ "$GPRMC,175254.253,A,4657.3420,N,00726.26$GPGGA,175255.253,4657.3421,N,00726.2688,E,1,04,9.0,568.4,M,48.0,M,0.0,0000*7A\r\n"
+ "$GPGSA,A,,E,0.16,151.85,230507,,*09\r\n"
+};
+#endif
+
+
+/*************************************************************************/
+
+/*
+ * open the specified serial port for read/write
+ * @return port file descriptor or -1
+ */
+
+#ifndef EMULATE
+static int openPort(const char *tty, int baud)
+{
+ int status;
+ int fd;
+ struct termios newtio;
+
+ /* open the tty */
+ fd = open(tty, O_RDWR | O_NOCTTY);
+ if (fd < 0) {
+ error("openPort: error open");
+ return fd;
+ }
+
+ /* flush serial port */
+ status = tcflush(fd, TCIFLUSH);
+ if (status < 0) {
+ error("openPort: error tcflush");
+ close(fd);
+ return -1;
+ }
+
+ /* get current terminal state */
+ tcgetattr(fd, &newtio);
+
+ /* set to raw terminal type */
+ newtio.c_cflag = baud | CS8 | CLOCAL | CREAD;
+ newtio.c_iflag = IGNBRK | IGNPAR;
+ newtio.c_oflag = 0;
+
+ /* control parameters */
+ newtio.c_cc[VMIN] = 1; /* block for at least one charater */
+
+ /* set its new attrigutes */
+ status = tcsetattr(fd, TCSANOW, &newtio);
+ if (status < 0) {
+ //error("tcsetattr() failed: %s", strerror(errno));
+ error("tcsetattr() failed: __ERRNO removed due lazy coder");
+ close(fd);
+ fd = -1;
+ return fd;
+ }
+ return fd;
+}
+#endif
+
+/** called when a gpgga message is received and parsed */
+static void gpgga_callout( __attribute__ ((unused)) nmeap_context_t * context, void *data, __attribute__ ((unused))
+ void *user_data)
+{
+ nmeap_gga_t *gga = (nmeap_gga_t *) data;
+
+ altitude = gga->altitude;
+ satellites = gga->satellites;
+ quality = gga->quality;
+ gpsTime = gga->time;
+
+ if (debug == 1)
+ debug("gps:debug: get gga callout\n");
+
+}
+
+
+//search a buffer for a string (forwards)
+int strLastOcc(char *theBuffer, char searchChar, int size)
+{
+ int i, ret;
+
+ ret = -1;
+ for (i = size; i >= 0; i--) {
+ if (theBuffer[i] == searchChar) {
+ ret = i;
+ break;
+ }
+ }
+ return ret;
+}
+
+//search a buffer for a string (backwards)
+int strFirstOcc(char *theBuffer, char searchChar, int size)
+{
+ int i, ret;
+ ret = -1;
+ for (i = 0; i < size; i++) {
+ if (theBuffer[i] == searchChar) {
+ ret = i;
+ break;
+ }
+ }
+ return ret;
+}
+
+
+
+/** called when a gprmc message is received and parsed */
+static void gprmc_callout( __attribute__ ((unused)) nmeap_context_t * context, void *data, __attribute__ ((unused))
+ void *user_data)
+{
+ nmeap_rmc_t *rmc = (nmeap_rmc_t *) data;
+
+ speed = rmc->speed;
+ gpsStatus = rmc->warn;
+ gpsTime = rmc->time;
+ gpsDate = rmc->date;
+
+ if (debug == 1)
+ debug("gps:debug: get rmc callout\n");
+
+}
+
+
+static int prepare_gps_parser()
+{
+ int status;
+ char *port = "/dev/usb/tts/1";
+ char *test;
+ int speed = 0; // 0 = default 4800 baud, 1 is 9600 baud
+
+ if ((test = getenv("GPS_PORT"))) { /* define your port via env variable */
+ port = test;
+ }
+
+ if ((test = getenv("GPS_9600"))) { /* define your port via env variable */
+ speed = 1;
+ }
+
+ /* --------------------------------------- */
+ /* open the serial port device */
+ /* using default 4800 baud for most GPS */
+ /* --------------------------------------- */
+#ifndef EMULATE
+ if (speed == 0)
+ fd_g = openPort(port, B4800);
+ else
+ fd_g = openPort(port, B9600);
+
+ if (fd_g < 0) {
+ /* open failed */
+ error("GPS PLUGIN, Error: openPort %d", fd_g);
+ return fd_g;
+ }
+#endif
+
+ /* --------------------------------------- */
+ /*STEP 2 : initialize the nmea context */
+ /* --------------------------------------- */
+ status = nmeap_init(&nmea, (void *) &user_data);
+ if (status != 0) {
+ error("GPS PLUGIN, Error: nmeap_init %d", status);
+ exit(1);
+ }
+
+ /* --------------------------------------- */
+ /*STEP 3 : add standard GPGGA parser */
+ /* -------------------------------------- */
+ status = nmeap_addParser(&nmea, "GPGGA", nmeap_gpgga, gpgga_callout, &gga);
+ if (status != 0) {
+ error("GPS PLUGIN, Error: nmeap_add GPGGA parser, error:%d", status);
+ return -1;
+ }
+
+ /* --------------------------------------- */
+ /*STEP 4 : add standard GPRMC parser */
+ /* -------------------------------------- */
+ /* status = nmeap_addParser(&nmea,"GPRMC",nmeap_gprmc,gprmc_callout,&rmc); */
+ status = nmeap_addParser(&nmea, "GPRMC", nmeap_gprmc, gprmc_callout, &rmc);
+ if (status != 0) {
+ error("GPS PLUGIN, Error: nmeap_add GPRMC parser, error:%d", status);
+ return -1;
+ }
+
+ return fd_g;
+}
+
+
+
+static void parse(RESULT * result, RESULT * theOptions, RESULT * displayOptions)
+{
+ int rem;
+ int offset;
+ int status;
+ int len;
+
+ long options;
+ long dispOptions;
+
+ char buffer[BUFFER_SIZE];
+ char bufferTmp[BUFFER_SIZE];
+
+ int validStart, validEnd;
+
+ options = R2N(theOptions);
+ dispOptions = R2N(displayOptions);
+ //error("options: %x\n",options);
+
+ if (dispOptions & OPTION_DEBUG)
+ debug = 1;
+
+ if ((dispOptions & OPTION_GET_BUFFERDATA) == 0) {
+
+ /* ---------------------------------------- */
+ /* STEP 6 : get a buffer of input */
+ /* --------------------------------------- */
+
+ memset(buffer, 0, BUFFER_SIZE);
+ if (fndStr > BUFFER_SIZE)
+ fndStr = 0;
+ //copy unfinished nmea strings back
+ if (fndStr > 0) {
+ memcpy(buffer, backBuffer, fndStr);
+ }
+#ifdef EMULATE
+ memcpy(&buffer[fndStr], &test_vector[emu_read_ofs], BUFFER_SIZE - fndStr);
+
+ len = rem = EMU_BUFFER_READ_SIZE;
+ emu_read_ofs += EMU_BUFFER_READ_SIZE;
+ if (emu_read_ofs > (sizeof(test_vector) - BUFFER_SIZE)) {
+ emu_read_ofs = 0;
+ memset(buffer, 0, BUFFER_SIZE);
+ }
+#else
+
+ len = rem = read(fd_g, buffer, BUFFER_SIZE - fndStr);
+ if (len <= 0) {
+ error("GPS Plugin, Error read from port, try using the GPS_PORT env variable (export GPS_PORT=/dev/mydev)");
+ //break;
+ }
+ if (debug == 1)
+ debug("gps:debug: read %d bytes\n", len);
+
+#endif
+ if (dispOptions & OPTION_RAW_NMEA)
+ printf("\n__[%s]", buffer + '\0');
+
+ /* ---------------------------------------------- */
+ /* STEP 7 : process input until buffer is used up */
+ /* ---------------------------------------------- */
+ validStart = strFirstOcc(buffer, '$', len);
+ validEnd = strLastOcc(buffer, '\n', len);
+
+ if (validStart >= 0 && validEnd > 0 && validStart < validEnd) {
+ //valid string found
+ memcpy(bufferTmp, buffer, sizeof(buffer)); //save buffer
+ memset(backBuffer, 0, sizeof(backBuffer)); //clear backup buffer
+ memcpy(backBuffer, buffer + validEnd, len - validEnd); // save incomplete nmea string
+ memset(buffer, 0, sizeof(buffer)); //clean buffer
+ memcpy(buffer, bufferTmp + validStart, validEnd - validStart + 1); //copy valid name string
+ fndStr = len - validEnd + validStart; //save the size of the buffer
+ } else {
+ //no valid nmea string found
+ fndStr = 0;
+ memset(buffer, 0, sizeof(buffer));
+ memset(backBuffer, 0, sizeof(backBuffer));
+ }
+
+ offset = 0;
+ if (debug == 1)
+ debug("backBuffer: %s\n", backBuffer);
+
+ //the nmeap_parseBuffer function needs whole nmea strings, combined string will NOT work!
+ validStart = strFirstOcc(buffer, '$', len);
+ validEnd = strFirstOcc(buffer, '\n', len);
+ while (validStart >= 0 && validEnd > 0 && validStart < validEnd) {
+ memset(bufferTmp, 0, sizeof(bufferTmp)); //empty temp buffer
+ memcpy(bufferTmp, buffer + offset + validStart, validEnd - validStart + 1); //fill temp buffer
+
+ if (debug == 1)
+ debug("submit: %s\n", bufferTmp);
+
+ rem = len - offset;
+ status = nmeap_parseBuffer(&nmea, (const char *) &bufferTmp, &rem); //parse it
+ if (status == -1) {
+ errCounter++;
+ error("parser error occurred! (cnt: %i)\n", errCounter);
+ } else if (status == 0) {
+ incomplCounter++;
+ } else if (status > 0)
+ msgCounter++;
+
+ offset += validEnd - validStart + 1; //update offset
+ validStart = strFirstOcc(buffer + offset, '$', len - offset); //find next sentence
+ validEnd = strFirstOcc(buffer + offset, '\n', len - offset);
+ }
+
+
+/* while (rem > 0) {
+ status = nmeap_parseBuffer(&nmea, &buffer[offset], &rem);
+ debug("\nGPS::debug: remaining: %d bytes\n",rem);
+ offset += (len - rem);
+ }*/
+ } // end of OPTION get bufferdata
+
+
+ /* --------------------------------------- */
+ /* DISPLAY stuff comes here... */
+ /* --------------------------------------- */
+ char *value = " ";
+ char outputStr[80];
+ memset(outputStr, 0, 80);
+
+ if (options & SHOW_ALTITUDE) {
+ if (dispOptions & OPTION_NO_PREFIX)
+ sprintf(outputStr, "%s%.0f ", outputStr, altitude);
+ else
+ sprintf(outputStr, "%salt:%.0f ", outputStr, altitude);
+ }
+ if (options & SHOW_SPEED) {
+ float knotsConvert = 1.852f; //default speed display=km/h
+ if (dispOptions & OPTION_SPEED_IN_KNOTS)
+ knotsConvert = 1.0f; //use knots
+
+ if (dispOptions & OPTION_NO_PREFIX)
+ sprintf(outputStr, "%s%.0f ", outputStr, speed * knotsConvert);
+ else
+ sprintf(outputStr, "%sspd:%.0f ", outputStr, speed * knotsConvert);
+ }
+ if (options & SHOW_COURSE) {
+ char courses[8][3] = { "N ", "NO", "O ", "SO", "S ", "SW", "W ", "NW" };
+ float degrees[8] = { 22.5f, 67.5f, 112.5f, 157.5f, 202.5f, 247.5f, 292.5f, 337.5f };
+ int selectedDegree = 0;
+ int n;
+
+ for (n = 0; n < 8; n++) {
+ if (course < degrees[n]) {
+ selectedDegree = n;
+ break;
+ }
+ }
+ if (dispOptions & OPTION_NO_PREFIX)
+ sprintf(outputStr, "%s%s ", outputStr, courses[selectedDegree]);
+ else
+ sprintf(outputStr, "%sdir:%s ", outputStr, courses[selectedDegree]);
+ }
+ if (options & SHOW_SATELLITES) {
+ if (dispOptions & OPTION_NO_PREFIX)
+ sprintf(outputStr, "%s%d ", outputStr, satellites);
+ else
+ sprintf(outputStr, "%ssat:%d ", outputStr, satellites);
+ }
+ if (options & SHOW_QUALITY) {
+ if (dispOptions & OPTION_NO_PREFIX)
+ sprintf(outputStr, "%s%d ", outputStr, quality);
+ else
+ sprintf(outputStr, "%squa:%d ", outputStr, quality);
+ }
+ if (options & SHOW_STATUS) {
+ if (dispOptions & OPTION_NO_PREFIX)
+ sprintf(outputStr, "%s%c ", outputStr, gpsStatus);
+ else
+ sprintf(outputStr, "%ssta:%c ", outputStr, gpsStatus);
+ }
+ if (options & SHOW_TIME_UTC) {
+ char digitizer[9]; //01:34:67
+ sprintf(digitizer, "%.6ld", gpsTime); //<012345>
+ digitizer[7] = digitizer[5];
+ digitizer[6] = digitizer[4];
+ digitizer[4] = digitizer[3];
+ digitizer[3] = digitizer[2];
+ digitizer[2] = ':';
+ digitizer[5] = ':';
+ digitizer[8] = '\0';
+ if (dispOptions & OPTION_NO_PREFIX)
+ sprintf(outputStr, "%s%s ", outputStr, digitizer);
+ else
+ sprintf(outputStr, "%sutc:%s ", outputStr, digitizer);
+ }
+ if (options & SHOW_DATE) {
+ char digitizer[9]; //01:34:67
+ sprintf(digitizer, "%.6ld", gpsDate); //<012345>
+ digitizer[7] = digitizer[5];
+ digitizer[6] = digitizer[4];
+ digitizer[4] = digitizer[3];
+ digitizer[3] = digitizer[2];
+ digitizer[2] = '/';
+ digitizer[5] = '/';
+ digitizer[8] = '\0';
+ if (dispOptions & OPTION_NO_PREFIX)
+ sprintf(outputStr, "%s%s ", outputStr, digitizer);
+ else
+ sprintf(outputStr, "%sdat:%s ", outputStr, digitizer);
+ }
+
+
+ if (dispOptions & SHOW_NMEA_STATUS) {
+ if (dispOptions & OPTION_NO_PREFIX)
+ sprintf(outputStr, "%s%04d/%04d/%04d ", outputStr, msgCounter, errCounter, incomplCounter);
+ else
+ sprintf(outputStr, "%sOK:%03d/Er:%03d/In:%03d ", outputStr, msgCounter, errCounter, incomplCounter);
+ }
+
+ if (options == 0 && dispOptions == 0) { //error, no parameter defined!
+ error("gps::parse() ERROR, no parameter specified!");
+ value = strdup("GPS ARG ERR");
+ } else {
+ value = strdup(outputStr);
+ }
+
+ SetResult(&result, R_STRING, value);
+ free(value);
+}
+
+
+/* plugin initialization */
+/* MUST NOT be declared 'static'! */
+int plugin_init_gps(void)
+{
+ info("%s: v%s", Name, "0.2");
+ prepare_gps_parser();
+
+ /* register all our cool functions */
+ /* the second parameter is the number of arguments */
+ /* -1 stands for variable argument list */
+ AddFunction("gps::parse", 2, parse);
+
+ return 0;
+}
+
+void plugin_exit_gps(void)
+{
+ info("%s: shutting down plugin.", Name);
+#ifndef EMULATE
+ close(fd_g);
+#endif
+}
generated by cgit v1.2.3 (git 2.25.1) at 2024-05-09 03:09:55 +0000