File content as of revision 0:8419f38ed886:

//Michael Antonucci
//Last modified Oct. 27, 2022
//Assignment 4, Exercise 1: Create a working code to parse NMEA inputs into human-readable data
#include "mbed.h"

Serial pc(USBTX, USBRX);

char dataque[100]; //calls for an array of 100 characters long with the name "dataque"
char header[5]; //calls for an array of 5 characters long with name "header"
float lat;   //creates float "lat" for latitude
float longi; //creates float "longi" for longitude
char ns[1];  //creates array of 1 character with name "ns"
char ew[1]; //creates array of 1 character with name "ew"
float elevation; //creates float "elevation"
char checksum[2]; //calls for an array of 2 characters long with name "checksum"
int seconds; //creates integer "seconds" for time
float xaccel; //creates float "xaccel" for x acceleration
float yaccel; //creates float "yaccel" for y acceleration
float zaccel; //creates float "zaccel" for z acceleration
float temp; //creates float "temp" for temperature
int main() { //starts main code
    while(1) {
        if (pc.readable()) { 
        pc.scanf("%s",dataque); 
        sscanf(dataque,"$%5s",header);
            if (!strcmp(header,"GPRMC")) { //if the header is "GPRMC"
             sscanf(dataque,"$%5s,%d,%f,%1s,%f,%1s,%f,*%2s", //reassigns variables to data
                             header,&seconds,&lat,ns,&longi,ew,&elevation,checksum);
             pc.printf("GPS NMEA string recieved:\r\n"); //prints type of message
             pc.printf("Time: %d seconds\r\n",seconds); //prints time
             pc.printf("Latitude: %f degrees %s",lat,ns); //prints latitude
             pc.printf("Longitude: %f degrees %s\r\n",longi,ew); //prints longitude
             pc.printf("Elevation: %f m\r\n",elevation); //prints elevation
             pc.printf("Checksum Value: %s",checksum); //prints checksum value
             }
            else if (!strcmp(header,"IMUPO")) { //if the header is "IMUPO", print a message
             sscanf(dataque,"$%5s,%d,%f,%f,%f,*%2s", //reassigns variables to data
                             header,
                             &seconds,
                             &xaccel,
                             &yaccel,
                             &zaccel,
                             checksum);
             pc.printf("Motion Message NMEA string recieved:\r\n"); //prints type of data
             pc.printf("Time: %d seconds\r\n",seconds); //prints time
             pc.printf("X-Acceleration: %f m/s^2 \r\n",xaccel); //prints x acceleration
             pc.printf("Y-Acceleration: %f m/s^2 \r\n",yaccel); //prints y acceleration
             pc.printf("Z-Acceleration: %f m/s^2 \r\n",zaccel); //prints z acceleration
             pc.printf("Checksum Value: %2s \r\n",checksum); //prints checksum value
             }
            else if (!strcmp(header,"TEMPE")) { //if the header is "TEMPE", print a message
             sscanf(dataque,"$%5s,%d,%f,*%2s", //reassigns variables to data
                            header,
                            &seconds,
                            &temp,
                            checksum);
             pc.printf("Temperature NMEA string recieved:\r\n"); //prints type of data
             pc.printf("Time: %d seconds\r\n",seconds); //prints time
             pc.printf("Temperature: %f degrees Celcius\r\n",temp); //prints temperature
             pc.printf("Checksum Value: %2s \r\n",checksum); //prints checksum value
             }
            else { //if the header is not one of those three, respond with an error message
             pc.printf("NOT A VALID NMEA INDICATOR \r\n"); //shows that error is associated with header format
             }
            }
        }
    }