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Driver file mmcdos.c and how to write in existing file

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eng.alamin

Joined: 08 Sep 2008
Posts: 17

Driver file mmcdos.c and how to write in existing file

Posted: Fri Dec 05, 2008 4:47 pm

hello guys

I am using MMCDOS.C driver to read and write in sd card.
My sd card is 256 MB FAT Format.
I stored text file named GPS.TXT.

Fortunately I successfully can open this file and read it
by using this code line:

Code:

strcpy(fname,"GPS.TXT");
rec_size=MMC_BUFF_SIZE;
error0=open_file(0,fname,rec_size);

do {
error0=file_read(0,buff0);

if (error0>0 && error0<255 )
{
printf("\n\r fread 0 failed error=%U\n\r",error0);
break;
}

printf("%s",buff0);

rec_no++;

} while (error0==0);

---------------------------------------------------------
Remember this code is based on mmcdos.c driver
---------------------------------------------------------

Now I want to write in this file (gps.txt).
I tried to use

Code:

int file_write(int8 fnbr,int *buff);

but I didn't know how to use it correctly.
If anyone has been involved with this issue before please help me.
How to write string in sd card using this function ?

regards

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