Writing .txt file in SD Card - DE2

Hello! I write successfully in the SD Card!

But the alt_up_sd_card_write function available, writes a char based on the ASCII table (inputting a hexadecimal).

Now I am thing a way to convert a double value to enter in this write function. But this is a C problem! But I will post here when I find the solution.

This is a simple program that demonstrates the write function

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# include <stdio.h>

# include <altera_up_sd_card_avalon_interface.h>

# include <altera_avalon_pio_regs.h>

int main(void){

alt_up_sd_card_dev *device_reference = NULL;

int connected = 0;

short int handler;

short int att;

char data = 0x00;

int loop;

printf("Insert the SD Card \n");

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

if (device_reference != NULL) {

while(1){

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

printf("SD Card Connected. \n");

IOWR_ALTERA_AVALON_PIO_DATA(LEDR_BASE, 0xFFFF);

if(alt_up_sd_card_is_FAT16()){

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

/* Start to create a file */

handler = alt_up_sd_card_fopen ("file.txt", true);

for(loop = 0; loop < 1000; loop++){

data++;

alt_up_sd_card_write(handler, 0x33);

alt_up_sd_card_write(handler, 0x20);/*0x20 = space , 0x0D = enter*/

}

att = alt_up_sd_card_get_attributes(handler);

printf ("get_attrubutes return: %d\n", att);

alt_up_sd_card_fclose(handler);

/* End */

} else{

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

}

connected = 1;

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

printf("SD disconected. \n");

IOWR_ALTERA_AVALON_PIO_DATA(LEDR_BASE, 0);

connected = 0;

}

}

}

return 0;

}

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This program only writes "3 3 3 3 3 3 3 3 3..." in the SD Card. I tried to write "0x0D" that means ENTER button to write a matrix, but this failed, but that is ok for me writing the number separated by spaces (or comas).

Thank everyone!

PS: Yes I am from Brazil! Oi! Tudo bem :)