Multi-Hackers / GpsParser

GPS NEMA String parser library. Only supports SkyTraq Venus chip at this time.

Dependents:   MTDOT-EVB-LinkCheck-AL MTDOT-BOX-EVB-Factory-Firmware-LIB-108 TelitSensorToCloud mDot_sensor_to_cloud ... more

GPSPARSER.cpp@6:2050b4795b66, 2015-12-04 (annotated)

Committer:
Mike Fiore
Date:
Fri Dec 04 16:40:41 2015 -0600
Revision:
6:2050b4795b66
Parent:
4:ae35903cd8d2
Child:
7:bd1013ba8afd
accept NCP5623B led controller as optional parameter - blink led_3 when not locked, keep solid when locked

Who changed what in which revision?

UserRevisionLine numberNew contents of line
falingtrea 0:d2169fecf3fb 1 /**
falingtrea 0:d2169fecf3fb 2 * @file NemaParser.cpp
falingtrea 0:d2169fecf3fb 3 * @brief NEMA String to Packet Parser - NEMA strings to compact packet data
falingtrea 0:d2169fecf3fb 4 * @author Tim Barr
falingtrea 1:58c50bb3c60c 5 * @version 1.01
falingtrea 0:d2169fecf3fb 6 * @see http://www.kh-gps.de/nmea.faq
falingtrea 0:d2169fecf3fb 7 * @see http://www.catb.org/gpsd/NMEA.html
falingtrea 0:d2169fecf3fb 8 *
falingtrea 0:d2169fecf3fb 9 * Copyright (c) 2015
falingtrea 0:d2169fecf3fb 10 *
falingtrea 0:d2169fecf3fb 11 * Licensed under the Apache License, Version 2.0 (the "License");
falingtrea 0:d2169fecf3fb 12 * you may not use this file except in compliance with the License.
falingtrea 0:d2169fecf3fb 13 * You may obtain a copy of the License at
falingtrea 0:d2169fecf3fb 14 *
falingtrea 0:d2169fecf3fb 15 * http://www.apache.org/licenses/LICENSE-2.0
falingtrea 0:d2169fecf3fb 16 *
falingtrea 0:d2169fecf3fb 17 * Unless required by applicable law or agreed to in writing, software
falingtrea 0:d2169fecf3fb 18 * distributed under the License is distributed on an "AS IS" BASIS,
falingtrea 0:d2169fecf3fb 19 * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
falingtrea 0:d2169fecf3fb 20 * See the License for the specific language governing permissions and
falingtrea 0:d2169fecf3fb 21 * limitations under the License.
falingtrea 0:d2169fecf3fb 22 *
falingtrea 1:58c50bb3c60c 23 * 09/16/15 TAB V1.01 Changed report rate of GGA and GSA NEMA sentences
falingtrea 3:662aa99c5266 24 * 09/22/15 TAB V1.02 Fixed status value for no GPS detected. Increased report rate
falingtrea 3:662aa99c5266 25 * of GSV, GGA, and GSA NEMA Sentences
falingtrea 1:58c50bb3c60c 26 *
falingtrea 0:d2169fecf3fb 27 * TODO: Add speed, compass direction, error (DOP) data. Make init more generic
falingtrea 0:d2169fecf3fb 28 */
falingtrea 0:d2169fecf3fb 29
falingtrea 0:d2169fecf3fb 30 #include "GPSPARSER.h"
falingtrea 0:d2169fecf3fb 31
falingtrea 0:d2169fecf3fb 32 using namespace mts;
falingtrea 0:d2169fecf3fb 33
Mike Fiore 6:2050b4795b66 34 GPSPARSER::GPSPARSER(MTSSerial *uart, NCP5623B* led)
Mike Fiore 6:2050b4795b66 35 : _getSentenceThread(&GPSPARSER::startSentenceThread,this),
Mike Fiore 6:2050b4795b66 36 _led(led),
Mike Fiore 6:2050b4795b66 37 _led_state(0)
falingtrea 0:d2169fecf3fb 38 {
falingtrea 0:d2169fecf3fb 39 _gps_uart = uart;
falingtrea 0:d2169fecf3fb 40 _gps_uart->baud(9600); //set GPS baud rate here
mfiore 4:ae35903cd8d2 41
falingtrea 0:d2169fecf3fb 42 _gps_latitude.degrees = 0;
falingtrea 0:d2169fecf3fb 43 _gps_longitude.degrees = 0;
falingtrea 0:d2169fecf3fb 44 _timestamp.tm_sec = 0;
falingtrea 0:d2169fecf3fb 45 _timestamp.tm_min = 0;
falingtrea 0:d2169fecf3fb 46 _timestamp.tm_hour = 0;
falingtrea 0:d2169fecf3fb 47 _timestamp.tm_mday = 0;
falingtrea 0:d2169fecf3fb 48 _timestamp.tm_mon = 0;
falingtrea 0:d2169fecf3fb 49 _timestamp.tm_year = 0;
falingtrea 0:d2169fecf3fb 50 _timestamp.tm_wday = 0;
falingtrea 0:d2169fecf3fb 51 _timestamp.tm_yday = 0;
falingtrea 0:d2169fecf3fb 52 _timestamp.tm_isdst = -1; // time is UTC so no Daylight savings time
mfiore 4:ae35903cd8d2 53
falingtrea 0:d2169fecf3fb 54 _gps_status = false;
falingtrea 2:fbc098f1e7c0 55 _fix_status = 1;
falingtrea 0:d2169fecf3fb 56 _num_satellites =0;
falingtrea 0:d2169fecf3fb 57 _gps_detected = false;
falingtrea 0:d2169fecf3fb 58
mfiore 4:ae35903cd8d2 59 if (GPSPARSER::initGps() == 0) {
falingtrea 0:d2169fecf3fb 60 _gps_detected = true;
falingtrea 0:d2169fecf3fb 61 _getSentenceThread.signal_set(START_THREAD);
Mike Fiore 6:2050b4795b66 62 _led_timer.start();
falingtrea 0:d2169fecf3fb 63 printf("Started Nema Sentence Thread\r\n");
mfiore 4:ae35903cd8d2 64 } else {
falingtrea 3:662aa99c5266 65 printf("No GPS detected\r\n");
falingtrea 3:662aa99c5266 66 _fix_status = 0;
falingtrea 2:fbc098f1e7c0 67 }
mfiore 4:ae35903cd8d2 68
falingtrea 0:d2169fecf3fb 69 return;
falingtrea 0:d2169fecf3fb 70 }
falingtrea 0:d2169fecf3fb 71
mfiore 4:ae35903cd8d2 72 GPSPARSER::~GPSPARSER(void)
mfiore 4:ae35903cd8d2 73 {
falingtrea 0:d2169fecf3fb 74 if (_gps_detected)
falingtrea 0:d2169fecf3fb 75 _getSentenceThread.terminate();
falingtrea 0:d2169fecf3fb 76 }
falingtrea 0:d2169fecf3fb 77
mfiore 4:ae35903cd8d2 78 uint8_t GPSPARSER::initGps (void)
mfiore 4:ae35903cd8d2 79 {
mfiore 4:ae35903cd8d2 80
falingtrea 0:d2169fecf3fb 81 // this code is specific to the Skytraq Venus GPS chip. This code could be re-written to detect another type of
falingtrea 0:d2169fecf3fb 82 // GPS device. Maybe read serial port for a specific time and detect $GP from NEMA string
mfiore 4:ae35903cd8d2 83
falingtrea 3:662aa99c5266 84 // Sets Skytraq Venus GPS to output GGA,GSA,GSV every 10 seconds, and RMC every second, no ZDA,GLL,VTG
falingtrea 0:d2169fecf3fb 85 // setup string for GPS GGA GSA GSV GLL RMC VTG ZDA cksum
falingtrea 3:662aa99c5266 86 char init_gps[16] = {0xA0,0xA1,0x00,0x09,0x08,0x0A,0x0A,0x0A,0x00,0x01,0x00,0x00,0x00,0x03,0x0D,0x0A};
falingtrea 0:d2169fecf3fb 87 char chk_char;
falingtrea 0:d2169fecf3fb 88 uint8_t ret = 0;
falingtrea 0:d2169fecf3fb 89
falingtrea 0:d2169fecf3fb 90 _gps_uart->rxClear();
falingtrea 0:d2169fecf3fb 91 printf("Starting initGPS \r\n");
mfiore 4:ae35903cd8d2 92
falingtrea 0:d2169fecf3fb 93 _gps_uart->write(init_gps,16);
falingtrea 0:d2169fecf3fb 94 printf("wrote control data\r\n");
mfiore 4:ae35903cd8d2 95
falingtrea 0:d2169fecf3fb 96 do {
falingtrea 0:d2169fecf3fb 97 osDelay(10);
falingtrea 0:d2169fecf3fb 98 } while (!_gps_uart->txEmpty());
mfiore 4:ae35903cd8d2 99
falingtrea 0:d2169fecf3fb 100 osDelay(15);
mfiore 4:ae35903cd8d2 101
mfiore 4:ae35903cd8d2 102 if (_gps_uart->readable()) {
mfiore 4:ae35903cd8d2 103 do {
falingtrea 0:d2169fecf3fb 104 _gps_uart->read(chk_char,20);
falingtrea 0:d2169fecf3fb 105 } while ((chk_char != 0xA0) && (!_gps_uart->rxEmpty()));
mfiore 4:ae35903cd8d2 106
falingtrea 0:d2169fecf3fb 107 printf ("found 0xA0 or rx empty\r\n");
mfiore 4:ae35903cd8d2 108
mfiore 4:ae35903cd8d2 109 if (chk_char == 0xA0) {
falingtrea 0:d2169fecf3fb 110 _gps_uart->read(chk_char,15);
falingtrea 0:d2169fecf3fb 111 if (chk_char != 0xA1) {
falingtrea 0:d2169fecf3fb 112 printf( "initGPS failed no message\r\n");
falingtrea 0:d2169fecf3fb 113 ret = 1;
mfiore 4:ae35903cd8d2 114 } else {
falingtrea 0:d2169fecf3fb 115 printf("message received\r\n");
falingtrea 0:d2169fecf3fb 116 _gps_uart->read(chk_char);
falingtrea 0:d2169fecf3fb 117 _gps_uart->read(chk_char);
falingtrea 0:d2169fecf3fb 118 printf("message size - %x\r\n",chk_char);
falingtrea 0:d2169fecf3fb 119 _gps_uart->read(chk_char);
mfiore 4:ae35903cd8d2 120 if (chk_char != 0x83) {
falingtrea 0:d2169fecf3fb 121 printf("initGPS failed not ack message\r\n");
falingtrea 0:d2169fecf3fb 122 ret = 1;
mfiore 4:ae35903cd8d2 123 } else {
falingtrea 0:d2169fecf3fb 124 printf("ACK message received\r\n");
falingtrea 0:d2169fecf3fb 125 _gps_uart->read(chk_char);
falingtrea 0:d2169fecf3fb 126 printf("config message acknowledged - ID - %x\r\n",chk_char);
falingtrea 0:d2169fecf3fb 127 }
falingtrea 0:d2169fecf3fb 128 }
mfiore 4:ae35903cd8d2 129 } else {
falingtrea 0:d2169fecf3fb 130 printf("rx empty \r\n");
falingtrea 0:d2169fecf3fb 131 ret = 1;
falingtrea 0:d2169fecf3fb 132 }
mfiore 4:ae35903cd8d2 133 } else {
falingtrea 0:d2169fecf3fb 134 printf("No readable characters\r\n");
falingtrea 0:d2169fecf3fb 135 ret = 1;
falingtrea 0:d2169fecf3fb 136 }
falingtrea 0:d2169fecf3fb 137
falingtrea 0:d2169fecf3fb 138 printf("initGps done\r\n");
falingtrea 0:d2169fecf3fb 139 return ret;
falingtrea 0:d2169fecf3fb 140 }
falingtrea 0:d2169fecf3fb 141
mfiore 4:ae35903cd8d2 142 void GPSPARSER::startSentenceThread(void const *p)
mfiore 4:ae35903cd8d2 143 {
mfiore 4:ae35903cd8d2 144 GPSPARSER *instance = (GPSPARSER*)p;
mfiore 4:ae35903cd8d2 145 instance->readNemaSentence();
falingtrea 0:d2169fecf3fb 146 }
falingtrea 0:d2169fecf3fb 147
mfiore 4:ae35903cd8d2 148 void GPSPARSER::readNemaSentence (void)
mfiore 4:ae35903cd8d2 149 {
falingtrea 0:d2169fecf3fb 150 char chk_char;
mfiore 4:ae35903cd8d2 151 uint8_t calc_cksum;
falingtrea 0:d2169fecf3fb 152 uint8_t nema_cksum;
falingtrea 0:d2169fecf3fb 153 char nema_id[2];
falingtrea 0:d2169fecf3fb 154 char nema_str[80];
falingtrea 0:d2169fecf3fb 155 char cksum_str[2];
mfiore 4:ae35903cd8d2 156
falingtrea 0:d2169fecf3fb 157 _getSentenceThread.signal_wait(START_THREAD);
falingtrea 0:d2169fecf3fb 158 printf("Got thread start\r\n");
mfiore 4:ae35903cd8d2 159
falingtrea 0:d2169fecf3fb 160 do {
mfiore 4:ae35903cd8d2 161 if (_gps_uart->readable() > 80) {
mfiore 4:ae35903cd8d2 162 do {
falingtrea 0:d2169fecf3fb 163 _gps_uart->read(chk_char);
falingtrea 0:d2169fecf3fb 164 } while ((chk_char != '$') && (!_gps_uart->rxEmpty()));
mfiore 4:ae35903cd8d2 165
falingtrea 0:d2169fecf3fb 166 if (chk_char == '$') {
falingtrea 0:d2169fecf3fb 167 _gps_uart->read(nema_id,2);
mfiore 4:ae35903cd8d2 168 if (strpbrk(nema_id,"GP") != NULL) {
falingtrea 0:d2169fecf3fb 169 uint8_t i = 0;
falingtrea 0:d2169fecf3fb 170 calc_cksum = 0x17; // 8 bit XOR of G and P checksum seed
falingtrea 0:d2169fecf3fb 171 nema_cksum = 0; // initialize nema string checksum
falingtrea 0:d2169fecf3fb 172 memset(nema_str,0x00,80); // clear nema_str array
falingtrea 0:d2169fecf3fb 173 do {
falingtrea 0:d2169fecf3fb 174 _gps_uart->read(chk_char);
mfiore 4:ae35903cd8d2 175 if ((chk_char != 0x0D) && (chk_char != '*')) {
falingtrea 0:d2169fecf3fb 176 nema_str[i++] = chk_char;
falingtrea 0:d2169fecf3fb 177 calc_cksum ^= chk_char; // 8 bit XOR checksum
falingtrea 0:d2169fecf3fb 178 }
falingtrea 0:d2169fecf3fb 179 if (chk_char == '*') {
mfiore 4:ae35903cd8d2 180 _gps_uart->read(cksum_str,2);
falingtrea 0:d2169fecf3fb 181 nema_cksum = (uint8_t)strtoul(cksum_str,NULL,16);
falingtrea 0:d2169fecf3fb 182 }
falingtrea 0:d2169fecf3fb 183 } while (( chk_char != 0x0D) && !_gps_uart->rxEmpty());
mfiore 4:ae35903cd8d2 184
falingtrea 0:d2169fecf3fb 185 if (nema_cksum == calc_cksum)
falingtrea 0:d2169fecf3fb 186 if (strncmp (nema_str,"GGA",3) == 0)
falingtrea 0:d2169fecf3fb 187 parseGGA(nema_str);
falingtrea 0:d2169fecf3fb 188 else if (strncmp (nema_str,"GSA",3) == 0)
mfiore 4:ae35903cd8d2 189 parseGSA(nema_str);
mfiore 4:ae35903cd8d2 190 else if (strncmp (nema_str,"GSV",3) == 0)
mfiore 4:ae35903cd8d2 191 parseGSV(nema_str);
mfiore 4:ae35903cd8d2 192 else if (strncmp (nema_str,"GLL",3) == 0)
mfiore 4:ae35903cd8d2 193 parseGLL(nema_str);
mfiore 4:ae35903cd8d2 194 else if (strncmp (nema_str,"RMC",3) == 0)
mfiore 4:ae35903cd8d2 195 parseRMC(nema_str);
mfiore 4:ae35903cd8d2 196 else if (strncmp (nema_str,"VTG",3) == 0)
mfiore 4:ae35903cd8d2 197 parseVTG(nema_str);
mfiore 4:ae35903cd8d2 198 else if (strncmp (nema_str,"ZDA",3) == 0)
mfiore 4:ae35903cd8d2 199 parseZDA(nema_str);
mfiore 4:ae35903cd8d2 200 else
mfiore 4:ae35903cd8d2 201 printf("Unknown NEMA String Type\r\n");
falingtrea 0:d2169fecf3fb 202 else
falingtrea 0:d2169fecf3fb 203 printf("NEMA String checksum error %x != %x\r\n",nema_cksum,calc_cksum);
falingtrea 0:d2169fecf3fb 204 }
mfiore 4:ae35903cd8d2 205 } else
falingtrea 0:d2169fecf3fb 206 printf("RX empty before all data read\r\n");
falingtrea 0:d2169fecf3fb 207 }
falingtrea 0:d2169fecf3fb 208
Mike Fiore 6:2050b4795b66 209 if (_led) {
Mike Fiore 6:2050b4795b66 210 if (_fix_status >= 2) {
Mike Fiore 6:2050b4795b66 211 _led->setPWM(NCP5623B::LED_3, 8);
Mike Fiore 6:2050b4795b66 212 } else if (_led_timer.read_ms() > 1000) {
Mike Fiore 6:2050b4795b66 213 _led_timer.reset();
Mike Fiore 6:2050b4795b66 214 _led_state = (_led_state == 0) ? 8 : 0;
Mike Fiore 6:2050b4795b66 215 _led->setPWM(NCP5623B::LED_3, _led_state);
Mike Fiore 6:2050b4795b66 216 }
Mike Fiore 6:2050b4795b66 217 }
Mike Fiore 6:2050b4795b66 218
falingtrea 0:d2169fecf3fb 219 osDelay(100);
falingtrea 0:d2169fecf3fb 220
falingtrea 0:d2169fecf3fb 221 } while(true);
falingtrea 0:d2169fecf3fb 222
falingtrea 0:d2169fecf3fb 223 }
falingtrea 0:d2169fecf3fb 224
mfiore 4:ae35903cd8d2 225 uint8_t GPSPARSER::parseGGA(char *nema_buf)
mfiore 4:ae35903cd8d2 226 {
falingtrea 0:d2169fecf3fb 227 char* token_str;
falingtrea 0:d2169fecf3fb 228 uint8_t ret = 0;
mfiore 4:ae35903cd8d2 229
falingtrea 0:d2169fecf3fb 230 token_str = strtok(nema_buf, ",");
falingtrea 0:d2169fecf3fb 231 // skip timestamp
falingtrea 0:d2169fecf3fb 232 token_str = strtok(NULL, ",");
falingtrea 0:d2169fecf3fb 233 // skip latitude degrees minutes
falingtrea 0:d2169fecf3fb 234 token_str = strtok(NULL, ",");
falingtrea 0:d2169fecf3fb 235 token_str = strtok(NULL, ",");
falingtrea 0:d2169fecf3fb 236 // skip longitude degree minutes
falingtrea 0:d2169fecf3fb 237 token_str = strtok(NULL, ",");
falingtrea 0:d2169fecf3fb 238 token_str = strtok(NULL, ",");
mfiore 4:ae35903cd8d2 239 // read fix quality
falingtrea 0:d2169fecf3fb 240 token_str = strtok(NULL, ",");
falingtrea 0:d2169fecf3fb 241 _fix_quality = atoi(token_str);
falingtrea 0:d2169fecf3fb 242 // skip number of satellites and horizontal dilution
falingtrea 0:d2169fecf3fb 243 token_str = strtok(NULL, ",");
falingtrea 0:d2169fecf3fb 244 token_str = strtok(NULL, ",");
falingtrea 0:d2169fecf3fb 245 // read msl altitude in meters
falingtrea 0:d2169fecf3fb 246 token_str = strtok(NULL, ",");
falingtrea 0:d2169fecf3fb 247 _msl_altitude = atoi(token_str);
falingtrea 0:d2169fecf3fb 248
falingtrea 0:d2169fecf3fb 249 return ret;
falingtrea 0:d2169fecf3fb 250 }
mfiore 4:ae35903cd8d2 251
mfiore 4:ae35903cd8d2 252 uint8_t GPSPARSER::parseGSA(char *nema_buf)
mfiore 4:ae35903cd8d2 253 {
falingtrea 0:d2169fecf3fb 254 char* token_str;
falingtrea 0:d2169fecf3fb 255 uint8_t ret = 0;
mfiore 4:ae35903cd8d2 256
falingtrea 0:d2169fecf3fb 257 token_str = strtok(nema_buf, ",");
falingtrea 0:d2169fecf3fb 258 token_str = strtok(NULL, ",");
falingtrea 0:d2169fecf3fb 259 // read fix status
falingtrea 0:d2169fecf3fb 260 token_str = strtok(NULL, ",");
falingtrea 0:d2169fecf3fb 261 _fix_status = atoi(token_str);
falingtrea 0:d2169fecf3fb 262 // read satellite PRNs
mfiore 4:ae35903cd8d2 263 for (uint8_t i=0; i<12; i++) {
falingtrea 0:d2169fecf3fb 264 token_str = strtok(NULL, ",");
falingtrea 0:d2169fecf3fb 265 _satellite_prn[i] = atoi(token_str);
falingtrea 0:d2169fecf3fb 266 }
falingtrea 0:d2169fecf3fb 267 return ret;
falingtrea 0:d2169fecf3fb 268 }
falingtrea 0:d2169fecf3fb 269
mfiore 4:ae35903cd8d2 270 uint8_t GPSPARSER::parseGSV(char *nema_buf)
mfiore 4:ae35903cd8d2 271 {
falingtrea 0:d2169fecf3fb 272 char* token_str;
falingtrea 0:d2169fecf3fb 273 uint8_t ret = 0;
mfiore 4:ae35903cd8d2 274
falingtrea 0:d2169fecf3fb 275 token_str = strtok(nema_buf, ",");
falingtrea 0:d2169fecf3fb 276 // skip number of sentences and sentence number for now
falingtrea 0:d2169fecf3fb 277 token_str = strtok(NULL, ",");
falingtrea 0:d2169fecf3fb 278 token_str = strtok(NULL, ",");
falingtrea 0:d2169fecf3fb 279 // read Number of satellites
falingtrea 0:d2169fecf3fb 280 token_str = strtok(NULL, ",");
falingtrea 0:d2169fecf3fb 281 _num_satellites = atoi(token_str);
falingtrea 0:d2169fecf3fb 282 // add code to read satellite specs if needed
falingtrea 0:d2169fecf3fb 283
falingtrea 0:d2169fecf3fb 284 return ret;
falingtrea 0:d2169fecf3fb 285 }
falingtrea 0:d2169fecf3fb 286
mfiore 4:ae35903cd8d2 287 uint8_t GPSPARSER::parseRMC(char *nema_buf)
mfiore 4:ae35903cd8d2 288 {
falingtrea 0:d2169fecf3fb 289 char* token_str;
falingtrea 0:d2169fecf3fb 290 char temp_str[6];
falingtrea 0:d2169fecf3fb 291 uint8_t ret = 0;
mfiore 4:ae35903cd8d2 292
falingtrea 0:d2169fecf3fb 293 token_str = strtok(nema_buf, ",");
falingtrea 0:d2169fecf3fb 294 // read timestamp
falingtrea 0:d2169fecf3fb 295 token_str = strtok(NULL, ",");
falingtrea 0:d2169fecf3fb 296 strncpy(temp_str,token_str,2);
falingtrea 0:d2169fecf3fb 297 _timestamp.tm_hour = atoi(temp_str);
falingtrea 0:d2169fecf3fb 298 memset(temp_str,0x00,6);
falingtrea 0:d2169fecf3fb 299 strncpy(temp_str,token_str+2,2);
falingtrea 0:d2169fecf3fb 300 _timestamp.tm_min = atoi(temp_str);
falingtrea 0:d2169fecf3fb 301 memset(temp_str,0x00,6);
falingtrea 0:d2169fecf3fb 302 strncpy(temp_str,token_str+4,2);
falingtrea 0:d2169fecf3fb 303 _timestamp.tm_sec = atoi(temp_str);
falingtrea 0:d2169fecf3fb 304 // set gps_status true = active
falingtrea 0:d2169fecf3fb 305 token_str = strtok(NULL, ",");
falingtrea 0:d2169fecf3fb 306 memset(temp_str,0x00,6);
falingtrea 0:d2169fecf3fb 307 strncpy(temp_str,token_str,1);
falingtrea 0:d2169fecf3fb 308 if (temp_str[0] == 'A')
falingtrea 0:d2169fecf3fb 309 _gps_status = true;
falingtrea 0:d2169fecf3fb 310 else
falingtrea 0:d2169fecf3fb 311 _gps_status = false;
falingtrea 0:d2169fecf3fb 312 // read latitude degrees minutes
falingtrea 0:d2169fecf3fb 313 token_str = strtok(NULL, ".");
falingtrea 0:d2169fecf3fb 314 memset(temp_str,0x00,6);
falingtrea 0:d2169fecf3fb 315 strncpy(temp_str,token_str,2);
falingtrea 0:d2169fecf3fb 316 _gps_latitude.degrees = atoi(temp_str);
falingtrea 0:d2169fecf3fb 317 memset(temp_str,0x00,6);
falingtrea 0:d2169fecf3fb 318 strncpy(temp_str,token_str+2,2);
falingtrea 0:d2169fecf3fb 319 _gps_latitude.minutes = atoi(temp_str);
falingtrea 0:d2169fecf3fb 320 // read fractional minutes
falingtrea 0:d2169fecf3fb 321 token_str = strtok(NULL, ",");
falingtrea 0:d2169fecf3fb 322 _gps_latitude.seconds = atoi(token_str);
falingtrea 0:d2169fecf3fb 323 // read latitude hemisphere change sign if 'S'
falingtrea 0:d2169fecf3fb 324 token_str = strtok(NULL, ",");
falingtrea 0:d2169fecf3fb 325 if (token_str[0] == 'S')
falingtrea 0:d2169fecf3fb 326 _gps_latitude.degrees *= -1;
falingtrea 0:d2169fecf3fb 327 // read longitude degree minutes
falingtrea 0:d2169fecf3fb 328 token_str = strtok(NULL, ".");
falingtrea 0:d2169fecf3fb 329 memset(temp_str,0x00,6);
falingtrea 0:d2169fecf3fb 330 strncpy(temp_str,token_str,3);
falingtrea 0:d2169fecf3fb 331 _gps_longitude.degrees = atoi(temp_str);
falingtrea 0:d2169fecf3fb 332 memset(temp_str,0x00,6);
falingtrea 0:d2169fecf3fb 333 strncpy(temp_str,token_str+3,2);
falingtrea 0:d2169fecf3fb 334 _gps_longitude.minutes = atoi(temp_str);
falingtrea 0:d2169fecf3fb 335 // read fractional minutes
falingtrea 0:d2169fecf3fb 336 token_str = strtok(NULL, ",");
falingtrea 0:d2169fecf3fb 337 _gps_longitude.seconds = atoi(token_str);
falingtrea 0:d2169fecf3fb 338 // read longitude hemisphere change sign if 'W'
falingtrea 0:d2169fecf3fb 339 token_str = strtok(NULL, ",");
falingtrea 0:d2169fecf3fb 340 if (token_str[0] == 'W')
falingtrea 0:d2169fecf3fb 341 _gps_longitude.degrees *= -1;
falingtrea 0:d2169fecf3fb 342 // skip speed and track angle
falingtrea 0:d2169fecf3fb 343 token_str = strtok(NULL, ",");
falingtrea 0:d2169fecf3fb 344 token_str = strtok(NULL, ",");
falingtrea 0:d2169fecf3fb 345 // read date
falingtrea 0:d2169fecf3fb 346 token_str = strtok(NULL, ",");
falingtrea 0:d2169fecf3fb 347 memset(temp_str,0x00,6);
falingtrea 0:d2169fecf3fb 348 strncpy(temp_str,token_str,2);
falingtrea 0:d2169fecf3fb 349 _timestamp.tm_mday = atoi(temp_str);
falingtrea 0:d2169fecf3fb 350 memset(temp_str,0x00,6);
falingtrea 0:d2169fecf3fb 351 strncpy(temp_str,token_str+2,2);
falingtrea 0:d2169fecf3fb 352 _timestamp.tm_mon = atoi(temp_str) - 1;
falingtrea 0:d2169fecf3fb 353 memset(temp_str,0x00,6);
falingtrea 0:d2169fecf3fb 354 strncpy(temp_str,token_str+4,2);
falingtrea 0:d2169fecf3fb 355 _timestamp.tm_year = atoi(temp_str) + 100;
falingtrea 0:d2169fecf3fb 356
falingtrea 0:d2169fecf3fb 357 return ret;
falingtrea 0:d2169fecf3fb 358 }
falingtrea 0:d2169fecf3fb 359
mfiore 4:ae35903cd8d2 360 uint8_t GPSPARSER::parseVTG(char *nema_buf)
mfiore 4:ae35903cd8d2 361 {
falingtrea 0:d2169fecf3fb 362 uint8_t ret = 0;
falingtrea 0:d2169fecf3fb 363 printf("ParseVTG****\r\n");
falingtrea 0:d2169fecf3fb 364 printf(nema_buf);
falingtrea 0:d2169fecf3fb 365 printf("\r\n");
falingtrea 0:d2169fecf3fb 366 return ret;
falingtrea 0:d2169fecf3fb 367 }
falingtrea 0:d2169fecf3fb 368
mfiore 4:ae35903cd8d2 369 uint8_t GPSPARSER::parseGLL(char *nema_buf)
mfiore 4:ae35903cd8d2 370 {
falingtrea 0:d2169fecf3fb 371 uint8_t ret = 0;
falingtrea 0:d2169fecf3fb 372 printf("ParseGLL*****\r\n");
falingtrea 0:d2169fecf3fb 373 printf(nema_buf);
falingtrea 0:d2169fecf3fb 374 printf("\r\n");
falingtrea 0:d2169fecf3fb 375 return ret;
falingtrea 0:d2169fecf3fb 376 }
falingtrea 0:d2169fecf3fb 377
mfiore 4:ae35903cd8d2 378 uint8_t GPSPARSER::parseZDA(char *nema_buf)
mfiore 4:ae35903cd8d2 379 {
falingtrea 0:d2169fecf3fb 380 uint8_t ret = 0;
falingtrea 0:d2169fecf3fb 381 printf("ParseZDA******\r\n");
falingtrea 0:d2169fecf3fb 382 printf(nema_buf);
falingtrea 0:d2169fecf3fb 383 printf("\r\n");
falingtrea 0:d2169fecf3fb 384 return ret;
falingtrea 0:d2169fecf3fb 385 }
falingtrea 0:d2169fecf3fb 386
mfiore 4:ae35903cd8d2 387 bool GPSPARSER::gpsDetected(void)
mfiore 4:ae35903cd8d2 388 {
falingtrea 0:d2169fecf3fb 389 return _gps_detected;
falingtrea 0:d2169fecf3fb 390 }
falingtrea 0:d2169fecf3fb 391
mfiore 4:ae35903cd8d2 392 GPSPARSER::longitude GPSPARSER::getLongitude(void)
mfiore 4:ae35903cd8d2 393 {
falingtrea 0:d2169fecf3fb 394 return _gps_longitude;
falingtrea 0:d2169fecf3fb 395 }
falingtrea 0:d2169fecf3fb 396
mfiore 4:ae35903cd8d2 397 GPSPARSER::latitude GPSPARSER::getLatitude(void)
mfiore 4:ae35903cd8d2 398 {
falingtrea 0:d2169fecf3fb 399 return _gps_latitude;
falingtrea 0:d2169fecf3fb 400 }
falingtrea 0:d2169fecf3fb 401
mfiore 4:ae35903cd8d2 402 struct tm GPSPARSER::getTimestamp(void) {
falingtrea 0:d2169fecf3fb 403 return _timestamp;
falingtrea 0:d2169fecf3fb 404 }
falingtrea 0:d2169fecf3fb 405
mfiore 4:ae35903cd8d2 406 bool GPSPARSER::getLockStatus(void)
mfiore 4:ae35903cd8d2 407 {
falingtrea 0:d2169fecf3fb 408 return _gps_status;
falingtrea 0:d2169fecf3fb 409 }
falingtrea 0:d2169fecf3fb 410
mfiore 4:ae35903cd8d2 411 uint8_t GPSPARSER::getFixStatus(void)
mfiore 4:ae35903cd8d2 412 {
falingtrea 0:d2169fecf3fb 413 return _fix_status;
falingtrea 0:d2169fecf3fb 414 }
falingtrea 0:d2169fecf3fb 415
mfiore 4:ae35903cd8d2 416 uint8_t GPSPARSER::getFixQuality(void)
mfiore 4:ae35903cd8d2 417 {
falingtrea 0:d2169fecf3fb 418 return _fix_quality;
falingtrea 0:d2169fecf3fb 419 }
falingtrea 0:d2169fecf3fb 420
mfiore 4:ae35903cd8d2 421 uint8_t GPSPARSER::getNumSatellites(void)
mfiore 4:ae35903cd8d2 422 {
falingtrea 0:d2169fecf3fb 423 return _num_satellites;
falingtrea 0:d2169fecf3fb 424 }
falingtrea 0:d2169fecf3fb 425
mfiore 4:ae35903cd8d2 426 int16_t GPSPARSER::getAltitude(void)
mfiore 4:ae35903cd8d2 427 {
falingtrea 0:d2169fecf3fb 428 return _msl_altitude;
falingtrea 0:d2169fecf3fb 429 }
Mike Fiore 6:2050b4795b66 430