int main(void)
{
tm4c123_spi_initialize();
{
F_FILE *file;
unsigned int n;
uint8_t data[512];
f_initvolume();
file = f_open("LOG00000.DAT", "w,32M");
if (file)
{
f_flush(file);
memset(data, 0xaa, sizeof(data));
for (n = 0; n < (32 * 1024 * 1024 / 512); n++)
{
f_write(data, 512, 1, file);
}
f_close(file);
}
f_delvolume();
}
while (1) { };
}
/* Stop HFAT operation on this volume during unmounting */
static int
e_hfat_stop (const char *name)
{
int ret;
ret = f_delvolume (hfat_driveno (name));
return hfat_to_efs_err (ret);
}
/* Format the media in drive number 'driveno'
Returns 0 for success and error code for failure. */
int
fs_hfat_format (int driveno)
{
int ret;
uint32 blocks;
uint16 bytes_per_block;
uint32 total_mb = 0;
/* Unprotect memory
* Due to the time taken to format we do not grab the global lock
* which allows other threads to operate concurrently if using flash.
* In lieu of this we must first unprotect the memory segment before
* we operate on the HFAT protected memory region. */
fs_efs2_unprotect_memory ();
/* We don't yet have an initialized drive. */
ret = f_initvolume (driveno, hfat_device_init, driveno);
/* An error indicating Not Formatted is OK */
if ((ret != F_NO_ERROR) && (ret != F_ERR_NOTFORMATTED))
goto cleanup;
/* Now we have an initialized volume.. Get the size. */
ret = hotplug_dev_get_size (hotplug_hdev (driveno),
&blocks, &bytes_per_block);
/* HFAT only works with block sizes of 512 bytes */
if (bytes_per_block == 512)
total_mb = (blocks / (1024 / bytes_per_block)) / 1024;
else
ret = F_ERR_INVALIDDRIVE;
/* Look at media size to determine FAT type */
if (ret == 0)
{
int ftype = total_mb <= 64 ? F_FAT12_MEDIA :
(total_mb <= 2048 ? F_FAT16_MEDIA : F_FAT32_MEDIA);
ret = f_format (driveno, ftype);
}
/* Discard the volume */
(void) f_delvolume (driveno);
cleanup:
/* Protect memory again */
fs_efs2_protect_memory ();
return hfat_to_efs_err (ret);
}
/* Start the filesystem (called during mount). */
static int
e_hfat_start (const char *name)
{
int ret;
int driveno = hfat_driveno (name);
/* Attempt to initialize the HFAT volume. Reads the partition table
* and verifies the formatting. */
ret = f_initvolume (driveno, hfat_device_init, driveno);
/* If that failed, we can not mount the volume */
if (ret)
{
/* HFAT leaves the volume allocated, so we must delete it
manually. Discard the return value from f_delvolume() because
the f_initvolume() error cause is more interesting. */
(void) f_delvolume (driveno);
}
return hfat_to_efs_err (ret);
}
/* Use to build file system (mount). */
uint8_t _f_poweron ( void )
{
f_delvolume();
return f_initvolume( ram_initfunc );
}
