Jorge Abraham Massih Vargas / MBed_Adafruit-GPS-Library

Bugs in parse method fixed

MBed_Adafruit_GPS.cpp@1:130bb8aa6cf2, 2019-07-29 (annotated)

Committer:
jorgmassih
Date:
Mon Jul 29 05:46:40 2019 +0000
Revision:
1:130bb8aa6cf2
Parent:
0:a23e3099bb0a 
bug with Fix fixed!

Who changed what in which revision?

UserRevisionLine numberNew contents of line
mlee350 0:a23e3099bb0a 1 /***********************************
mlee350 0:a23e3099bb0a 2 This is our GPS library
mlee350 0:a23e3099bb0a 3
mlee350 0:a23e3099bb0a 4 Adafruit invests time and resources providing this open source code,
mlee350 0:a23e3099bb0a 5 please support Adafruit and open-source hardware by purchasing
mlee350 0:a23e3099bb0a 6 products from Adafruit!
mlee350 0:a23e3099bb0a 7
mlee350 0:a23e3099bb0a 8 Written by Limor Fried/Ladyada for Adafruit Industries.
mlee350 0:a23e3099bb0a 9 BSD license, check license.txt for more information
mlee350 0:a23e3099bb0a 10 All text above must be included in any redistribution
mlee350 0:a23e3099bb0a 11 ****************************************/
mlee350 0:a23e3099bb0a 12
mlee350 0:a23e3099bb0a 13 #include "MBed_Adafruit_GPS.h"
mlee350 0:a23e3099bb0a 14
mlee350 0:a23e3099bb0a 15 // how long are max NMEA lines to parse?
mlee350 0:a23e3099bb0a 16 #define MAXLINELENGTH 120
mlee350 0:a23e3099bb0a 17
mlee350 0:a23e3099bb0a 18 // we double buffer: read one line in and leave one for the main program
mlee350 0:a23e3099bb0a 19 volatile char line1[MAXLINELENGTH];
mlee350 0:a23e3099bb0a 20 volatile char line2[MAXLINELENGTH];
mlee350 0:a23e3099bb0a 21 // our index into filling the current line
mlee350 0:a23e3099bb0a 22 volatile uint16_t lineidx=0;
mlee350 0:a23e3099bb0a 23 // pointers to the double buffers
mlee350 0:a23e3099bb0a 24 volatile char *currentline;
mlee350 0:a23e3099bb0a 25 volatile char *lastline;
mlee350 0:a23e3099bb0a 26 volatile bool recvdflag;
mlee350 0:a23e3099bb0a 27 volatile bool inStandbyMode;
mlee350 0:a23e3099bb0a 28
mlee350 0:a23e3099bb0a 29
mlee350 0:a23e3099bb0a 30 bool Adafruit_GPS::parse(char *nmea) {
mlee350 0:a23e3099bb0a 31 // do checksum check
mlee350 0:a23e3099bb0a 32
mlee350 0:a23e3099bb0a 33 // first look if we even have one
mlee350 0:a23e3099bb0a 34 if (nmea[strlen(nmea)-4] == '*') {
mlee350 0:a23e3099bb0a 35 uint16_t sum = parseHex(nmea[strlen(nmea)-3]) * 16;
mlee350 0:a23e3099bb0a 36 sum += parseHex(nmea[strlen(nmea)-2]);
mlee350 0:a23e3099bb0a 37
mlee350 0:a23e3099bb0a 38 // check checksum
mlee350 0:a23e3099bb0a 39 for (uint8_t i=1; i < (strlen(nmea)-4); i++) {
mlee350 0:a23e3099bb0a 40 sum ^= nmea[i];
mlee350 0:a23e3099bb0a 41 }
mlee350 0:a23e3099bb0a 42 if (sum != 0) {
mlee350 0:a23e3099bb0a 43 // bad checksum :(
mlee350 0:a23e3099bb0a 44 //return false;
mlee350 0:a23e3099bb0a 45 }
mlee350 0:a23e3099bb0a 46 }
mlee350 0:a23e3099bb0a 47
mlee350 0:a23e3099bb0a 48 // look for a few common sentences
jorgmassih 1:130bb8aa6cf2 49 if (strstr(nmea, "$GPRMC")) {
jorgmassih 1:130bb8aa6cf2 50 // found RMC
jorgmassih 1:130bb8aa6cf2 51 char *p = nmea;
jorgmassih 1:130bb8aa6cf2 52
jorgmassih 1:130bb8aa6cf2 53 // get time
jorgmassih 1:130bb8aa6cf2 54 p = strchr(p, ',')+1;
jorgmassih 1:130bb8aa6cf2 55 float timef = atof(p);
jorgmassih 1:130bb8aa6cf2 56 uint32_t time = timef;
jorgmassih 1:130bb8aa6cf2 57 hour = time / 10000;
jorgmassih 1:130bb8aa6cf2 58 minute = (time % 10000) / 100;
jorgmassih 1:130bb8aa6cf2 59 seconds = (time % 100);
jorgmassih 1:130bb8aa6cf2 60
jorgmassih 1:130bb8aa6cf2 61 milliseconds = fmod((double) timef, 1.0) * 1000;
jorgmassih 1:130bb8aa6cf2 62
jorgmassih 1:130bb8aa6cf2 63 p = strchr(p, ',')+1;
jorgmassih 1:130bb8aa6cf2 64 // Serial.println(p);
jorgmassih 1:130bb8aa6cf2 65
jorgmassih 1:130bb8aa6cf2 66 if (p[0] == 'A')
jorgmassih 1:130bb8aa6cf2 67 fix = true;
jorgmassih 1:130bb8aa6cf2 68 else if (p[0] == 'V')
jorgmassih 1:130bb8aa6cf2 69 fix = false;
jorgmassih 1:130bb8aa6cf2 70 else
jorgmassih 1:130bb8aa6cf2 71 return false;
jorgmassih 1:130bb8aa6cf2 72
jorgmassih 1:130bb8aa6cf2 73 // parse out latitude
jorgmassih 1:130bb8aa6cf2 74 p = strchr(p, ',')+1;
jorgmassih 1:130bb8aa6cf2 75 latitude = atof(p);
jorgmassih 1:130bb8aa6cf2 76
jorgmassih 1:130bb8aa6cf2 77 p = strchr(p, ',')+1;
jorgmassih 1:130bb8aa6cf2 78 if (p[0] == 'N') lat = 'N';
jorgmassih 1:130bb8aa6cf2 79 else if (p[0] == 'S') lat = 'S';
jorgmassih 1:130bb8aa6cf2 80 else if (p[0] == ',') lat = 0;
jorgmassih 1:130bb8aa6cf2 81 else return false;
jorgmassih 1:130bb8aa6cf2 82
jorgmassih 1:130bb8aa6cf2 83 // parse out longitude
jorgmassih 1:130bb8aa6cf2 84 p = strchr(p, ',')+1;
jorgmassih 1:130bb8aa6cf2 85 longitude = atof(p);
jorgmassih 1:130bb8aa6cf2 86
jorgmassih 1:130bb8aa6cf2 87 p = strchr(p, ',')+1;
jorgmassih 1:130bb8aa6cf2 88 if (p[0] == 'W') lon = 'W';
jorgmassih 1:130bb8aa6cf2 89 else if (p[0] == 'E') lon = 'E';
jorgmassih 1:130bb8aa6cf2 90 else if (p[0] == ',') lon = 0;
jorgmassih 1:130bb8aa6cf2 91 else return false;
jorgmassih 1:130bb8aa6cf2 92
jorgmassih 1:130bb8aa6cf2 93 // speed
jorgmassih 1:130bb8aa6cf2 94 p = strchr(p, ',')+1;
jorgmassih 1:130bb8aa6cf2 95 speed = atof(p);
jorgmassih 1:130bb8aa6cf2 96
jorgmassih 1:130bb8aa6cf2 97 // angle
jorgmassih 1:130bb8aa6cf2 98 p = strchr(p, ',')+1;
jorgmassih 1:130bb8aa6cf2 99 angle = atof(p);
jorgmassih 1:130bb8aa6cf2 100
jorgmassih 1:130bb8aa6cf2 101 p = strchr(p, ',')+1;
jorgmassih 1:130bb8aa6cf2 102 uint32_t fulldate = atof(p);
jorgmassih 1:130bb8aa6cf2 103 day = fulldate / 10000;
jorgmassih 1:130bb8aa6cf2 104 month = (fulldate % 10000) / 100;
jorgmassih 1:130bb8aa6cf2 105 year = (fulldate % 100);
jorgmassih 1:130bb8aa6cf2 106
jorgmassih 1:130bb8aa6cf2 107 // we dont parse the remaining, yet!
jorgmassih 1:130bb8aa6cf2 108 return true;
jorgmassih 1:130bb8aa6cf2 109 }
jorgmassih 1:130bb8aa6cf2 110
mlee350 0:a23e3099bb0a 111 if (strstr(nmea, "$GPGGA")) {
mlee350 0:a23e3099bb0a 112 // found GGA
mlee350 0:a23e3099bb0a 113 char *p = nmea;
mlee350 0:a23e3099bb0a 114 // get time
mlee350 0:a23e3099bb0a 115 p = strchr(p, ',')+1;
mlee350 0:a23e3099bb0a 116 float timef = atof(p);
mlee350 0:a23e3099bb0a 117 uint32_t time = timef;
mlee350 0:a23e3099bb0a 118 hour = time / 10000;
mlee350 0:a23e3099bb0a 119 minute = (time % 10000) / 100;
mlee350 0:a23e3099bb0a 120 seconds = (time % 100);
mlee350 0:a23e3099bb0a 121
mlee350 0:a23e3099bb0a 122 milliseconds = fmod((double) timef, 1.0) * 1000;
mlee350 0:a23e3099bb0a 123
mlee350 0:a23e3099bb0a 124 // parse out latitude
mlee350 0:a23e3099bb0a 125 p = strchr(p, ',')+1;
mlee350 0:a23e3099bb0a 126 latitude = atof(p);
mlee350 0:a23e3099bb0a 127
mlee350 0:a23e3099bb0a 128 p = strchr(p, ',')+1;
mlee350 0:a23e3099bb0a 129 if (p[0] == 'N') lat = 'N';
mlee350 0:a23e3099bb0a 130 else if (p[0] == 'S') lat = 'S';
mlee350 0:a23e3099bb0a 131 else if (p[0] == ',') lat = 0;
mlee350 0:a23e3099bb0a 132 else return false;
mlee350 0:a23e3099bb0a 133
mlee350 0:a23e3099bb0a 134 // parse out longitude
mlee350 0:a23e3099bb0a 135 p = strchr(p, ',')+1;
mlee350 0:a23e3099bb0a 136 longitude = atof(p);
mlee350 0:a23e3099bb0a 137
mlee350 0:a23e3099bb0a 138 p = strchr(p, ',')+1;
mlee350 0:a23e3099bb0a 139 if (p[0] == 'W') lon = 'W';
mlee350 0:a23e3099bb0a 140 else if (p[0] == 'E') lon = 'E';
mlee350 0:a23e3099bb0a 141 else if (p[0] == ',') lon = 0;
mlee350 0:a23e3099bb0a 142 else return false;
mlee350 0:a23e3099bb0a 143
mlee350 0:a23e3099bb0a 144 p = strchr(p, ',')+1;
mlee350 0:a23e3099bb0a 145 fixquality = atoi(p);
mlee350 0:a23e3099bb0a 146
mlee350 0:a23e3099bb0a 147 p = strchr(p, ',')+1;
mlee350 0:a23e3099bb0a 148 satellites = atoi(p);
mlee350 0:a23e3099bb0a 149
mlee350 0:a23e3099bb0a 150 p = strchr(p, ',')+1;
mlee350 0:a23e3099bb0a 151 HDOP = atof(p);
mlee350 0:a23e3099bb0a 152
mlee350 0:a23e3099bb0a 153 p = strchr(p, ',')+1;
mlee350 0:a23e3099bb0a 154 altitude = atof(p);
mlee350 0:a23e3099bb0a 155 p = strchr(p, ',')+1;
mlee350 0:a23e3099bb0a 156 p = strchr(p, ',')+1;
mlee350 0:a23e3099bb0a 157 geoidheight = atof(p);
mlee350 0:a23e3099bb0a 158 return true;
mlee350 0:a23e3099bb0a 159 }
jorgmassih 1:130bb8aa6cf2 160
mlee350 0:a23e3099bb0a 161 return false;
mlee350 0:a23e3099bb0a 162 }
mlee350 0:a23e3099bb0a 163
mlee350 0:a23e3099bb0a 164 char Adafruit_GPS::read(void) {
mlee350 0:a23e3099bb0a 165 char c = 0;
mlee350 0:a23e3099bb0a 166
mlee350 0:a23e3099bb0a 167 if (paused) return c;
mlee350 0:a23e3099bb0a 168
mlee350 0:a23e3099bb0a 169 if(!gpsSerial->readable()) return c;
mlee350 0:a23e3099bb0a 170 c = gpsSerial->getc();
mlee350 0:a23e3099bb0a 171
mlee350 0:a23e3099bb0a 172 //Serial.print(c);
mlee350 0:a23e3099bb0a 173
mlee350 0:a23e3099bb0a 174 if (c == '$') {
mlee350 0:a23e3099bb0a 175 currentline[lineidx] = 0;
mlee350 0:a23e3099bb0a 176 lineidx = 0;
mlee350 0:a23e3099bb0a 177 }
mlee350 0:a23e3099bb0a 178 if (c == '\n') {
mlee350 0:a23e3099bb0a 179 currentline[lineidx] = 0;
mlee350 0:a23e3099bb0a 180
mlee350 0:a23e3099bb0a 181 if (currentline == line1) {
mlee350 0:a23e3099bb0a 182 currentline = line2;
mlee350 0:a23e3099bb0a 183 lastline = line1;
mlee350 0:a23e3099bb0a 184 } else {
mlee350 0:a23e3099bb0a 185 currentline = line1;
mlee350 0:a23e3099bb0a 186 lastline = line2;
mlee350 0:a23e3099bb0a 187 }
mlee350 0:a23e3099bb0a 188
mlee350 0:a23e3099bb0a 189 lineidx = 0;
mlee350 0:a23e3099bb0a 190 recvdflag = true;
mlee350 0:a23e3099bb0a 191 }
mlee350 0:a23e3099bb0a 192
mlee350 0:a23e3099bb0a 193 currentline[lineidx++] = c;
mlee350 0:a23e3099bb0a 194 if (lineidx >= MAXLINELENGTH)
mlee350 0:a23e3099bb0a 195 lineidx = MAXLINELENGTH-1;
mlee350 0:a23e3099bb0a 196
mlee350 0:a23e3099bb0a 197 return c;
mlee350 0:a23e3099bb0a 198 }
mlee350 0:a23e3099bb0a 199
mlee350 0:a23e3099bb0a 200 Adafruit_GPS::Adafruit_GPS (Serial *ser)
mlee350 0:a23e3099bb0a 201 {
mlee350 0:a23e3099bb0a 202 common_init(); // Set everything to common state, then...
mlee350 0:a23e3099bb0a 203 gpsSerial = ser; // ...override gpsSwSerial with value passed.
mlee350 0:a23e3099bb0a 204 }
mlee350 0:a23e3099bb0a 205
mlee350 0:a23e3099bb0a 206 // Initialization code used by all constructor types
mlee350 0:a23e3099bb0a 207 void Adafruit_GPS::common_init(void) {
mlee350 0:a23e3099bb0a 208 gpsSerial = NULL;
mlee350 0:a23e3099bb0a 209 recvdflag = false;
mlee350 0:a23e3099bb0a 210 paused = false;
mlee350 0:a23e3099bb0a 211 lineidx = 0;
mlee350 0:a23e3099bb0a 212 currentline = line1;
mlee350 0:a23e3099bb0a 213 lastline = line2;
mlee350 0:a23e3099bb0a 214
mlee350 0:a23e3099bb0a 215 hour = minute = seconds = year = month = day =
mlee350 0:a23e3099bb0a 216 fixquality = satellites = 0; // uint8_t
mlee350 0:a23e3099bb0a 217 lat = lon = mag = 0; // char
mlee350 0:a23e3099bb0a 218 fix = false; // bool
mlee350 0:a23e3099bb0a 219 milliseconds = 0; // uint16_t
mlee350 0:a23e3099bb0a 220 latitude = longitude = geoidheight = altitude =
mlee350 0:a23e3099bb0a 221 speed = angle = magvariation = HDOP = 0.0; // float
mlee350 0:a23e3099bb0a 222 }
mlee350 0:a23e3099bb0a 223
mlee350 0:a23e3099bb0a 224 void Adafruit_GPS::begin(int baud)
mlee350 0:a23e3099bb0a 225 {
mlee350 0:a23e3099bb0a 226 gpsSerial->baud(baud);
mlee350 0:a23e3099bb0a 227 wait_ms(10);
mlee350 0:a23e3099bb0a 228 }
mlee350 0:a23e3099bb0a 229
mlee350 0:a23e3099bb0a 230 void Adafruit_GPS::sendCommand(char *str) {
mlee350 0:a23e3099bb0a 231 gpsSerial->printf("%s",str);
mlee350 0:a23e3099bb0a 232 }
mlee350 0:a23e3099bb0a 233
mlee350 0:a23e3099bb0a 234 bool Adafruit_GPS::newNMEAreceived(void) {
mlee350 0:a23e3099bb0a 235 return recvdflag;
mlee350 0:a23e3099bb0a 236 }
mlee350 0:a23e3099bb0a 237
mlee350 0:a23e3099bb0a 238 void Adafruit_GPS::pause(bool p) {
mlee350 0:a23e3099bb0a 239 paused = p;
mlee350 0:a23e3099bb0a 240 }
mlee350 0:a23e3099bb0a 241
mlee350 0:a23e3099bb0a 242 char *Adafruit_GPS::lastNMEA(void) {
mlee350 0:a23e3099bb0a 243 recvdflag = false;
mlee350 0:a23e3099bb0a 244 return (char *)lastline;
mlee350 0:a23e3099bb0a 245 }
mlee350 0:a23e3099bb0a 246
mlee350 0:a23e3099bb0a 247 // read a Hex value and return the decimal equivalent
mlee350 0:a23e3099bb0a 248 uint8_t Adafruit_GPS::parseHex(char c) {
mlee350 0:a23e3099bb0a 249 if (c < '0')
mlee350 0:a23e3099bb0a 250 return 0;
mlee350 0:a23e3099bb0a 251 if (c <= '9')
mlee350 0:a23e3099bb0a 252 return c - '0';
mlee350 0:a23e3099bb0a 253 if (c < 'A')
mlee350 0:a23e3099bb0a 254 return 0;
mlee350 0:a23e3099bb0a 255 if (c <= 'F')
mlee350 0:a23e3099bb0a 256 return (c - 'A')+10;
mlee350 0:a23e3099bb0a 257 }
mlee350 0:a23e3099bb0a 258
mlee350 0:a23e3099bb0a 259 bool Adafruit_GPS::waitForSentence(char *wait4me, uint8_t max) {
mlee350 0:a23e3099bb0a 260 char str[20];
mlee350 0:a23e3099bb0a 261
mlee350 0:a23e3099bb0a 262 uint8_t i=0;
mlee350 0:a23e3099bb0a 263 while (i < max) {
mlee350 0:a23e3099bb0a 264 if (newNMEAreceived()) {
mlee350 0:a23e3099bb0a 265 char *nmea = lastNMEA();
mlee350 0:a23e3099bb0a 266 strncpy(str, nmea, 20);
mlee350 0:a23e3099bb0a 267 str[19] = 0;
mlee350 0:a23e3099bb0a 268 i++;
mlee350 0:a23e3099bb0a 269
mlee350 0:a23e3099bb0a 270 if (strstr(str, wait4me))
mlee350 0:a23e3099bb0a 271 return true;
mlee350 0:a23e3099bb0a 272 }
mlee350 0:a23e3099bb0a 273 }
mlee350 0:a23e3099bb0a 274
mlee350 0:a23e3099bb0a 275 return false;
mlee350 0:a23e3099bb0a 276 }
mlee350 0:a23e3099bb0a 277
mlee350 0:a23e3099bb0a 278 bool Adafruit_GPS::LOCUS_StartLogger(void) {
mlee350 0:a23e3099bb0a 279 sendCommand(PMTK_LOCUS_STARTLOG);
mlee350 0:a23e3099bb0a 280 recvdflag = false;
mlee350 0:a23e3099bb0a 281 return waitForSentence(PMTK_LOCUS_LOGSTARTED);
mlee350 0:a23e3099bb0a 282 }
mlee350 0:a23e3099bb0a 283
mlee350 0:a23e3099bb0a 284 bool Adafruit_GPS::LOCUS_ReadStatus(void) {
mlee350 0:a23e3099bb0a 285 sendCommand(PMTK_LOCUS_QUERY_STATUS);
mlee350 0:a23e3099bb0a 286
mlee350 0:a23e3099bb0a 287 if (! waitForSentence("$PMTKLOG"))
mlee350 0:a23e3099bb0a 288 return false;
mlee350 0:a23e3099bb0a 289
mlee350 0:a23e3099bb0a 290 char *response = lastNMEA();
mlee350 0:a23e3099bb0a 291 uint16_t parsed[10];
mlee350 0:a23e3099bb0a 292 uint8_t i;
mlee350 0:a23e3099bb0a 293
mlee350 0:a23e3099bb0a 294 for (i=0; i<10; i++) parsed[i] = -1;
mlee350 0:a23e3099bb0a 295
mlee350 0:a23e3099bb0a 296 response = strchr(response, ',');
mlee350 0:a23e3099bb0a 297 for (i=0; i<10; i++) {
mlee350 0:a23e3099bb0a 298 if (!response || (response[0] == 0) || (response[0] == '*'))
mlee350 0:a23e3099bb0a 299 break;
mlee350 0:a23e3099bb0a 300 response++;
mlee350 0:a23e3099bb0a 301 parsed[i]=0;
mlee350 0:a23e3099bb0a 302 while ((response[0] != ',') &&
mlee350 0:a23e3099bb0a 303 (response[0] != '*') && (response[0] != 0)) {
mlee350 0:a23e3099bb0a 304 parsed[i] *= 10;
mlee350 0:a23e3099bb0a 305 char c = response[0];
mlee350 0:a23e3099bb0a 306 if (isdigit(c))
mlee350 0:a23e3099bb0a 307 parsed[i] += c - '0';
mlee350 0:a23e3099bb0a 308 else
mlee350 0:a23e3099bb0a 309 parsed[i] = c;
mlee350 0:a23e3099bb0a 310 response++;
mlee350 0:a23e3099bb0a 311 }
mlee350 0:a23e3099bb0a 312 }
mlee350 0:a23e3099bb0a 313 LOCUS_serial = parsed[0];
mlee350 0:a23e3099bb0a 314 LOCUS_type = parsed[1];
mlee350 0:a23e3099bb0a 315 if (isalpha(parsed[2])) {
mlee350 0:a23e3099bb0a 316 parsed[2] = parsed[2] - 'a' + 10;
mlee350 0:a23e3099bb0a 317 }
mlee350 0:a23e3099bb0a 318 LOCUS_mode = parsed[2];
mlee350 0:a23e3099bb0a 319 LOCUS_config = parsed[3];
mlee350 0:a23e3099bb0a 320 LOCUS_interval = parsed[4];
mlee350 0:a23e3099bb0a 321 LOCUS_distance = parsed[5];
mlee350 0:a23e3099bb0a 322 LOCUS_speed = parsed[6];
mlee350 0:a23e3099bb0a 323 LOCUS_status = !parsed[7];
mlee350 0:a23e3099bb0a 324 LOCUS_records = parsed[8];
mlee350 0:a23e3099bb0a 325 LOCUS_percent = parsed[9];
mlee350 0:a23e3099bb0a 326
mlee350 0:a23e3099bb0a 327 return true;
mlee350 0:a23e3099bb0a 328 }
mlee350 0:a23e3099bb0a 329
mlee350 0:a23e3099bb0a 330 // Standby Mode Switches
mlee350 0:a23e3099bb0a 331 bool Adafruit_GPS::standby(void) {
mlee350 0:a23e3099bb0a 332 if (inStandbyMode) {
mlee350 0:a23e3099bb0a 333 return false; // Returns false if already in standby mode, so that you do not wake it up by sending commands to GPS
mlee350 0:a23e3099bb0a 334 }
mlee350 0:a23e3099bb0a 335 else {
mlee350 0:a23e3099bb0a 336 inStandbyMode = true;
mlee350 0:a23e3099bb0a 337 sendCommand(PMTK_STANDBY);
mlee350 0:a23e3099bb0a 338 //return waitForSentence(PMTK_STANDBY_SUCCESS); // don't seem to be fast enough to catch the message, or something else just is not working
mlee350 0:a23e3099bb0a 339 return true;
mlee350 0:a23e3099bb0a 340 }
mlee350 0:a23e3099bb0a 341 }
mlee350 0:a23e3099bb0a 342
mlee350 0:a23e3099bb0a 343 bool Adafruit_GPS::wakeup(void) {
mlee350 0:a23e3099bb0a 344 if (inStandbyMode) {
mlee350 0:a23e3099bb0a 345 inStandbyMode = false;
mlee350 0:a23e3099bb0a 346 sendCommand(""); // send byte to wake it up
mlee350 0:a23e3099bb0a 347 return waitForSentence(PMTK_AWAKE);
mlee350 0:a23e3099bb0a 348 }
mlee350 0:a23e3099bb0a 349 else {
mlee350 0:a23e3099bb0a 350 return false; // Returns false if not in standby mode, nothing to wakeup
mlee350 0:a23e3099bb0a 351 }
mlee350 0:a23e3099bb0a 352 }