File content as of revision 3:bd223559f79b:

#include "files.h"
#include "USBSerial.h"
extern Serial _serialport;

#if (MBED_MAJOR_VERSION == 2)
#include    "SDFileSystem.h"
#elif (MBED_MAJOR_VERSION == 5)
#include    "SDBlockDevice.h"
#include    "FATFileSystem.h"
#endif

#if (MBED_MAJOR_VERSION == 2)
SDFileSystem    sd(D11, D12, D13, D10, "fs");  // do,di,clk,cs
#elif (MBED_MAJOR_VERSION == 5)
//SDBlockDevice   sd(D11, D12, D13, D10, 8000000);
SDBlockDevice   sd(SPI0_MOSI, SPI0_MISO, SPI0_SCK, SPI0_SS, 8000000);    // For MAX32630FTHR
FATFileSystem   fs("fs");
#endif


int totaFunctionlFiles = 0;
int functionFileNumber = 1;
int functionActive = 0;
extern int functionPosition = 0;
Function ffunc;

int initSDCard()
{
#if (MBED_MAJOR_VERSION == 5)
    /* Init SD CARD reader */
    sd.init();
    fs.mount(&sd);
#endif
    FILE* fp = fopen("/fs/mydata.txt", "a");
    if (fp != 0) {
        _serialport.printf("writing something\n\r\n");
        fprintf(fp,"writing something\n\r\n");
    } else {
        _serialport.printf("ERROR\r\n");
    }
    fclose(fp);
    return 0;
}

int readFileNames()
{
    DIR *d;
    struct dirent *p;

    d = opendir("/fs/functions");
    if (d != NULL) {
        while ((p = readdir(d)) != NULL) {
//            printf(" - %s\n", p->d_name);
            totaFunctionlFiles++;
        }
    } else {
        printf("Could not open directory!\n");
    }
    closedir(d);
    printf("Total files = %d\n", totaFunctionlFiles);
    return 0;
}

int navFunctionFiles(int direction)
{

    if(direction == DIR_UP) {
        if(functionFileNumber < totaFunctionlFiles) {
            functionFileNumber++;
        } else {
            functionFileNumber = 1;
        }
        printf("UP: %d\n", functionFileNumber);
    } else {
        if(functionFileNumber > 1) {
            functionFileNumber--;
        } else {
            functionFileNumber = totaFunctionlFiles;
        }
        printf("DOWN: %d\n", functionFileNumber);
    }
    return 0;
}

int openFunctionFile(int inpFile)
{
    char fileLoc [40];
    sprintf (fileLoc, "/fs/functions/function%d.txt", inpFile);
    printf ("[%s] is location %d file number\n", fileLoc, inpFile);

    FILE* fp = fopen(fileLoc, "r");
    ffunc.pos=0;
    while (fscanf(fp, "%d,%d", &ffunc.x[ffunc.pos], &ffunc.t[ffunc.pos]) != EOF) {
        ffunc.pos++;
    }

    fclose(fp);
    functionActive = 1;
    functionPosition = 0;
    printFunctionData();
    return 0;
}

void printFunctionData()
{
    printf ("total: %d\n", ffunc.pos);
    for(int i=0; i<ffunc.pos; i++ ) {
        printf ("%d, %d\n", ffunc.x[i], ffunc.t[i]);
    }
}