How to Save Data in uClinux

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You need to mount flash correctly.

Something like this...

mkdir /mnt/flash

mount -t jffs2 /dev/mtdblock2 /mnt/flash

After mounted, you should be able to make file on the file system.

either do cp command and copy file or use vi to create something text file.

Since jffs2 is file system, you just want to open file or write file rather than direct read/write access to specific address on the flash.

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Hi nekojiru

Below is my mtd system

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root:/> cat /proc/mtd

dev: size erasesize name

mtd0: 02800000 00020000 "userspace"

mtd1: 00100000 00020000 "U-Boot"

mtd2: 00400000 00020000 "uImage1"

mtd3: 00400000 00020000 "uImage2"

mtd4: 00400000 00020000 "uImage3"

mtd5: 00380000 00020000 "DEFAULT_MMU"

mtd6: 00380000 00020000 "MAXIMUM_MMU"

mtd7: 00380000 00020000 "USER_IMAGE"

mtd8: 00020000 00020000 "options-bits"

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below is my filesystems

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root:/> cat /proc/filesystems

nodev sysfs

nodev rootfs

nodev proc

nodev tmpfs

nodev sockfs

nodev pipefs

nodev configfs

nodev devpts

nodev ramfs

nodev jffs2

nodev autofs

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At first, I decide to mount mtdblock0 to mnt/flash

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root:/> mkdir /mnt/flash

root:/> mount -t jffs2 /dev/mtdblock0 /mnt/flash

mount: mounting /dev/mtdblock0 on /mnt/flash failed: Invalid argument

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Then I think it is caused by mtdblock0 is not a jffs2 filesystem.

I try to remove jffs2 and exec it

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root:/> mount -t /dev/mtdblock0 /mnt/flash

mount: can't read /etc/fstab: No such file or directory

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I realize inside my system, I don't have fstab file!!!

Below is my executed result..

http://i55.tinypic.com/34q8f0h.jpg