Re: Compact Flash

Altera_Forum · ‎10-03-2006

I'm using a 1GByte Compact Flash disk with the Altera 1c20 eval board. I can not write more than 500MBytes to it. Does anybody know how to solve this problem?

Altera_Forum · ‎10-05-2006

There should be no 512M limits.

There is a limit of 2GB on FAT filesystem.

Please try read/write to the CF drive, and bypass the FAT.

dd if=/dev/hda of=/dev/null

dd if=/dev/zero of=/dev/hda

Altera_Forum · ‎10-05-2006

--- Quote Start ---

originally posted by hippo@Oct 4 2006, 09:30 PM

there should be no 512m limits.

there is a limit of 2gb on fat filesystem.

please try read/write to the cf drive, and bypass the fat.

dd if=/dev/hda of=/dev/null

dd if=/dev/zero of=/dev/hda

<div align='right'><{post_snapback}> (index.php?act=findpost&pid=18553)

--- quote end ---

--- Quote End ---

I typed the dd if=/dev/hda of=/dev/null

the output was:

hda:hda1

2001888+0 records in

2001888+0 records out

after I typed: dd if=/dev/zero of=/dev/hda

hda: hda1

/dev/hda: No space left on device

2001889+0 records in

2001888+0 records out

I tried using the CompactFlash in FAT and ext2, I got the same results, can not write more than 500MB to the disk.

Is it normal for the LEDs and the 7-segment displays to be counting? I did not write a routine to do that, and as soon as the system is up, it start counting.

Thanks for the input

Altera_Forum · ‎10-06-2006

it is possible to switch off the Leds and 7 Seg display when configuring the kernel.

Processor type and features

[] Enable leds, seven segment display

Altera_Forum · ‎10-06-2006

--- Quote Start ---

originally posted by nacide@Oct 6 2006, 05:39 AM

it is possible to switch off the leds and 7 seg display when configuring the kernel.

processor type and features

[] enable leds, seven segment display

<div align='right'><{post_snapback}> (index.php?act=findpost&pid=18576)

--- quote end ---

--- Quote End ---

After performing those commands, I had to reformat the disk. Now, I'm able to write more than 512MB. It seems that I missed up the Disk, when I turned the card off before umounting the disk. Why is that? In my application, the power can go away while the board is running. Is there a way out of this??

There must be a task running in the background to blink the leds, and the seven segment displays. Is this standard with the uClinux-Nios port?

Thanks

Altera_Forum · ‎10-06-2006

You might try using a different filesystem. Since you're stating that power can go away, at any time, why not JFFS2 (or some other _journalling_ filesystem)?

In any case, I don't see your issue as specific to Nios/uCLinux (at this point), so you might try asking the question in other forums, or doing some internet sleuthing on your own.

[EDIT: Out of curiousity, I found this link (http://www.openpsion.org/howtos/series5mx_new/x176.htm). ]

Good luck!

- slacker