write file .txt to sd card on DE2

Hi everybody!!!!

I'm trying to write a txt.file using SD Card Ip from Altera. when i built my project no error, but when i RUN AS, my project isn't writen successfuly.

Help me!!!!!!!!!!!!!!!

give me some advised

my code:

# include <io.h># include <system.h># include <stdio.h># include "altera_up_sd_card_avalon_interface.h"

char name[] =" vidu.txt"; // when you open file vidu.txt, you see " xinchaocacban"

short int file_handle;

bool create, hum ;

//=================initial sd card connect==================

alt_up_sd_card_dev *device_reference = NULL;

int connected = 0;

device_reference = alt_up_sd_card_open_dev("/dev/SD_Card_0");

if (device_reference != NULL)

{

if ((connected == 0) && (alt_up_sd_card_is_Present()))

{

printf("Card connected.\n");

if (alt_up_sd_card_is_FAT16())

{

printf("FAT16 file system detected.\n");

}

else

{

printf("Unknown file system.\n");

}

connected = 1;

}

else if ((connected == 1) && (alt_up_sd_card_is_Present() == false))

{

printf("Card disconnected.\n");

connected = 0;

}

}

//===============ghi file text================

file_handle = alt_up_sd_card_fopen(name, create);

if (file_handle == -1)

printf("file could not be open.\n");

else if ((file_handle == -2))

printf("file be already.\n");

else

printf("file be open.\n");

if (create == true)

printf("file be create .\n");

for(j=0; j< 256; j++)

{

hum= alt_up_sd_card_write(file_handle,ag[j]);

}

if (hum == true)

printf ("successful. \n");

alt_up_sd_card_fclose(file_handle);

}