File content as of revision 4:872676dd87a4:

#include "mbed.h"
#include "Utils.h"

SDBlockDevice bd(SD_MOSI, SD_MISO, SD_SCK, SD_CS);
FATFileSystem Root("Root");

int Exist_Val = 0;

void return_error(int ret_val)
{
    Exist_Val = 0;
    if (ret_val){
        printf("  Problème carte SD = %d\r\n", ret_val);
        Exist_Val = 0;
    }else{
        printf("  SD -> OK.\r\n");
        Exist_Val = 1;
        }
}

void errno_error(void* ret_val)
{
    Exist_Val = 0;
    if (ret_val == NULL){
        printf("  Problème carte SD = %d \r\n", errno);
        Exist_Val = 0;
    }else{
        printf("  SD -> OK.\r\n");
        Exist_Val = 1;
        }
}

void UTILS::Store_A_Val(float Val_To_Store, char* File_Name)
{

    char filename[20];
    sprintf(filename, "/Root/%s.txt", File_Name);

    FILE* fd = fopen(filename, "w");
    errno_error(fd);
    fprintf(fd, "%f\r\n", Val_To_Store);
    fclose(fd);

    printf("  \r\n  %s sauvegardée = %f\r\n", filename, Val_To_Store);

}

float UTILS::Read_A_Val(char* File_Name)
{
    char buffer[10] = {0};
    char c = {0};
    char *token;
    int i = 0;

    char filename[20];
    sprintf(filename, "/Root/%s.txt", File_Name);

    printf("  \n  Récupération de %s...\r\n", filename);

    FILE* fd = fopen(filename, "r");
    errno_error(fd);
    
    while ((c != '\n') && (i < 10)) {
        c = fgetc(fd);
        buffer[i] = c;
        i++;
    }

    token = strtok(buffer, "\n");

    float val = atof(token);

    printf("  Valeur Récupérée = %f\r\n", val);

    fclose(fd);

    return val;
}


void UTILS::Write_SD_File(char* To_Store, char* File_Name)
{
    char filename[50];
    sprintf(filename, "/Root/%s", (string)File_Name);
    
    FILE* fd = fopen(filename, "a");
    
    errno_error(fd);
    fprintf(fd, "%s\r\n", To_Store);
    fclose(fd);

    //printf("  Sauvegarde OK\r\n\r\n");
}

void UTILS::Read_SD_File(char* File_Name)
{
    char filename[20];
    sprintf(filename, "/Root/%s", File_Name);
    
    FILE* fd = fopen(filename, "r");
    errno_error(fd);

    printf("  Contenu du fichier :\r\n\r\n");
    char buff[16] = {0};
    while (!feof(fd)) {
        int size = fread(&buff[0], 1, 15, fd);
        fwrite(&buff[0], 1, size, stdout);
    }
    printf("\r\n  Fin du fichier.\r\n");
    fclose(fd);
}

bool UTILS::File_Exist(char* File_Name)
{
    char filename[20];
    sprintf(filename, "/Root/%s.txt", File_Name);
    
    FILE* fd = fopen(filename, "r");
    errno_error(fd);
    
    if (Exist_Val == 0){
        printf("  Le fichier %s n'existe pas....\r\n", filename);
        fclose(fd);
        return false;
    }else{
        fclose(fd);
        return true;
    }   
}

void UTILS::Delete_SD_File(char* File_Name)
{
    char filename[20];
    sprintf(filename, "/Root/%s", File_Name);
    int error = 0;
    error = Root.remove(filename);
    return_error(error);

    printf("Fichier effacé.\n");
}

void UTILS::Rename_SD_File(char* Old_File_Name, char* New_File_Name)
{
    char Oldfilename[20];
    sprintf(Oldfilename, "/Root/%s", Old_File_Name);
    char Newfilename[20];
    sprintf(Newfilename, "/Root/%s", New_File_Name);

    int error = 0;
    error = Root.rename(Oldfilename, Newfilename);
    return_error(error);

    printf("Fichier renommé.\n");
}

void UTILS::Mount_SD()
{
    //Montage carte SD
    printf("  Montage carte SD \"/Root\". \r\n\r\n");
    int error = 0;
    error = Root.mount(&bd);
    return_error(error);
    if (error > 0) {
        //On re format s'il n'y a as de file system...normalement une seul fois...
        printf("Pas de File system, on format... ");
        Format_SD();
    }
}

void UTILS::UnMount_SD()
{
    //Montage carte SD
    printf("  Demontage carte SD \"/Root\". \r\n\r\n");
    int error = 0;
    error = Root.unmount();
    return_error(error);
}

void UTILS::Format_SD()
{
    //Formatage carte SD
    printf("  Formatage carte SD\r\n\r\n");
    int error = 0;
    error = FATFileSystem::format(&bd);
    return_error(error);
}

void UTILS::Dir_SD(char* Dir_Name)
{
    int error = 0;
    int nb = 0;
    printf("\r\n  Ouverture du répertoire %s\r\n", Dir_Name);
    char Dirname[20];
    sprintf(Dirname, "/Root/%s", Dir_Name);
    
    DIR* dir = opendir(Dirname);
    //errno_error(fd);

    struct dirent* de;
    printf("  Fichier du répertoire :\r\n\r\n");
    while((de = readdir(dir)) != NULL)
    {
    printf("  %s\r\n", &(de->d_name)[0]);
    nb++;
    //wait_ms(100);
  }
    printf("\r\n  Nombre de fichiers = %d\r\n", nb);
    printf("  Fermeture du répertoire.\r\n");
    //error = closedir(dir);
    return_error(error);
}

int UTILS::File_Index()
{
    int error = 0;
    int nb = 0;
    
    DIR* dir = opendir("/Root/");
    struct dirent* de;
    while((de = readdir(dir)) != NULL)
    {
    nb++;
    }
    error = closedir(dir);
    return_error(error);
    
    return nb - 2;
}

//Remapping d'une valeur dans une autre échelle
float UTILS::Remap(float x, float in_min, float in_max, float out_min, float out_max)
{
    return (x - in_min) * (out_max - out_min) / (in_max - in_min) + out_min;
}

//Contraint une valeur entre deux limites
float UTILS::constrain(float x, float a, float b)
{
    if(x < a) {
        return a;
    } else if(b < x) {
        return b;
    } else
        return x;
}