File content as of revision 0:547856de255b:

#include "SDFileSystem.h"
#include "mbed.h"
Serial pc(USBTX, USBRX);
FILE *fp;

void createDataFile() {
    fp = fopen("/fs/dataLog.txt", "a");// open file and prepare to write
    if (fp == NULL) {
        pc.printf("Failed to open the file.\n\r");
    }
        fprintf(fp, "Time (s)\t temperature (c)\t UV (mW/cm2)\t red (mW/cm2)\t green (mW/cm2)\t blue (mW/cm2)");
}

void createDataFile_testRGB() {
    fp = fopen("/fs/dataLog.txt", "a");// open file and prepare to write
    if (fp == NULL) {
        pc.printf("Failed to open the file.\n\r");
    }
    fprint(fp, "Time (s)\t red (mW/cm2)\t green (mW/cm2)\t blue (mW/cm2)");
}
void writeData(uint16_t time, uint16_t temp, uint16_t uv, uint16_t red, uint16_t green, uint16_t blue)
{
    fp = fopen("/fs/dataLog.txt", "w"); //open file and prepare to write
    if (fp == NULL) {
        pc.printf("Failed to open the file.\n\r");
        }
    if(time < .6) {//if it is the first time being called then output data title
        fprint(fp, "Time (s)\t temperature (c)\t UV (mW/cm2)\t red (mW/cm2)\t green (mW/cm2)\t blue (mW/cm2)");
        }
    //output values for each
    fprintf(fp, "%.2f \t %.2f\n\r", time, temp, uv, red, green, blue);
}

void writeData_testRGB(float time, uint16_t red, uint16_t green, uint16_t blue) {
    
    //output values for each
    fprintf(fp, "%.2f \t %.2f\n\r", time, temp, uv, red, green, blue);
}
bool mountFailure(){
    if (fs.mount !=0) return false;//if mount has been accomplished return false
    //remember to change if statment's true to a correct mount failure input else return true;
    //if mount has failed return true
}

void closeDataFile() {
    fclose(fp);
    sd.unmount();
}