Oops! Corrupt filesystem from LocalFileSystem library?

Page last updated 14 Oct 2010, by Marcus Jansson. 0 replies

#include "mbed.h"

Ticker timer1;
Ticker timer2;
double start, end;

Timer timer;

DigitalOut led1(LED1);
DigitalOut led2(LED2);
DigitalOut led3(LED3);

LocalFileSystem local("local");             // Create the local filesystem under the name "local"

void attime()
{
led1 = !led1;
}

void attime2()
{
led2 = !led2;
}

int main()
{
FILE *fp = fopen("/local/HelloKitty.txt", "w");
fprintf(fp, "Hello Kitty!\n");
timer.start();
start = timer.read_us();
led3 = !led3;
end = timer.read_us();
fprintf(fp, "Toggling led takes about %f us.\n",end-start);
fclose(fp);

timer1.attach(&attime, 2);
timer2.attach(&attime2,3);
while(1) {
led3 = !led3;
}
}


~$ ls /media/MBED/ -l
total 531777
drwx------ 4 marcus marcus       512 2008-01-01 11:00 about 2..000
-rwxr-xr-x 1 marcus marcus        51 2008-01-01 11:00 HELLOKIT.TXT
-rwxr-xr-x 1 marcus marcus        51 2008-01-01 11:00 HELLOKIT.TXT
-r-xr-xr-x 1 marcus marcus 544433515 1996-03-04 11:43 hello ki.tty
-rwxr-xr-x 1 marcus marcus     23472 2010-10-14 21:41 HelloWorld_LPC1768.bin
-rwxr-xr-x 1 marcus marcus     23472 2010-10-14 21:41 HelloWorld_LPC1768.bin
-rwxr-xr-x 1 marcus marcus       340 2008-01-01 11:00 MBED.HTM
-rwxr-xr-x 1 marcus marcus     28088 2010-10-14 22:17 test1_LPC1768.bin
-rwxr-xr-x 1 marcus marcus     28088 2010-10-14 22:17 test1_LPC1768.bin

Copying files to the mbed was not successful. Deleting files was not successful.

Formating the mbed and making a fat filesystem set things back to normal again.

~$ sudo mkfs.vfat -n mbed -I /dev/sdb

The cause for the filesystem corruption is unclear, but I have some good ideas.

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