Zachary Rubin / Mbed 2 deprecated PVA_logger

a program i made a while back to log gps/accelerometer data

Dependencies:   FatFileSystem mbed

GPS_LS20031.cpp@0:82a02991476c, 2012-09-08 (annotated)

Committer:
Xach
Date:
Sat Sep 08 20:40:58 2012 +0000
Revision:
0:82a02991476c
a program i made a while back to log gps/accelerometer data

Who changed what in which revision?

UserRevisionLine numberNew contents of line
Xach 0:82a02991476c 1
Xach 0:82a02991476c 2 #include "GPS_LS20031.h"
Xach 0:82a02991476c 3 #include "mbed.h"
Xach 0:82a02991476c 4
Xach 0:82a02991476c 5
Xach 0:82a02991476c 6
Xach 0:82a02991476c 7 char checkSum(char* theseChars) {
Xach 0:82a02991476c 8 char check = 0;
Xach 0:82a02991476c 9 // iterate over the string, XOR each byte with the total sum:
Xach 0:82a02991476c 10
Xach 0:82a02991476c 11 for (int c = 1;theseChars[c]!= '*'; c++) {
Xach 0:82a02991476c 12 check = char(check ^ theseChars[c]);
Xach 0:82a02991476c 13 }
Xach 0:82a02991476c 14 // return the result
Xach 0:82a02991476c 15 return check;
Xach 0:82a02991476c 16 }
Xach 0:82a02991476c 17
Xach 0:82a02991476c 18 bool NMEA_parse(char *msg) {
Xach 0:82a02991476c 19 char ns, ew,av;
Xach 0:82a02991476c 20 float magVar;
Xach 0:82a02991476c 21
Xach 0:82a02991476c 22
Xach 0:82a02991476c 23 // Check if it is a GPGGA msg (matches both locked and non-locked msg)
Xach 0:82a02991476c 24 if (sscanf(msg, "$GPRMC,%f,%c,%f,%c,%f,%c,%f,%f,%f", &timeG, &av, &latitude, &ns, &longitude, &ew, &speed_knotts, &magVar, &date) >= 1) {
Xach 0:82a02991476c 25 if (av == 'A') {
Xach 0:82a02991476c 26 if (ns == 'S') {
Xach 0:82a02991476c 27 latitude *= -1.0;
Xach 0:82a02991476c 28 }
Xach 0:82a02991476c 29 if (ew == 'W') {
Xach 0:82a02991476c 30 longitude *= -1.0;
Xach 0:82a02991476c 31 }
Xach 0:82a02991476c 32 return true;
Xach 0:82a02991476c 33 /* float degrees = trunc(latitude / 100.0f);
Xach 0:82a02991476c 34 float minutes = latitude - (degrees * 100.0f);
Xach 0:82a02991476c 35 latitude = degrees + minutes / 60.0f;
Xach 0:82a02991476c 36 degrees = trunc(longitude / 100.0f); //a term had to be removed from this line
Xach 0:82a02991476c 37 minutes = longitude - (degrees * 100.0f);
Xach 0:82a02991476c 38 longitude = degrees + minutes / 60.0f;*/
Xach 0:82a02991476c 39 }
Xach 0:82a02991476c 40 else {
Xach 0:82a02991476c 41 longitude = 0.0;
Xach 0:82a02991476c 42 latitude = 0.0;
Xach 0:82a02991476c 43 return false;
Xach 0:82a02991476c 44 }
Xach 0:82a02991476c 45
Xach 0:82a02991476c 46 }
Xach 0:82a02991476c 47 return false;
Xach 0:82a02991476c 48
Xach 0:82a02991476c 49 }