Ubuntu 利用 mtd-utils 制作ubifs.img

确保已经安装了有关的工具

sudo apt-get install mtd-utils

mkfs.ubifs -d fs -m  -o rootfslink.ubiimg -e  -c  -F -v
sleep
sync
ubinize -o fs.img -m 2KiB -p 128KiB ubi.cfg -v
sleep
rm rootfslink.ubiimg
sync

$ cat ubi.cfg
[ubifs-volumn]
mode=ubi
image=./rootfslink.ubiimg
vol_id=
vol_type=dynamic
vol_alignment=
vol_name=ubifs
vol_flags=autoresize

$ cat ubi.sh
INPUT=$sudo mkfs.ubifs -d ${INPUT} -m  -o rootfslink.ubiimg -e  -c  -F -v
sudo ubinize -o ${INPUT}.img -m 2KiB -p 128KiB ubi.cfg -v
sudo rm rootfslink.ubiimg

ubinize的用法

1.ubinize支持哪些选项

Usage: ubinize [options] <ini-file>

Generate UBI images. An UBI image may contain one or more UBI volumes which
have to be defined in the input configuration ini-file. The flash
characteristics are defined via the command-line options.

-o, --output=<file name> output file name
-p, --peb-size=<bytes> size of the physical eraseblock of the flash this UBI image is created for in bytes,kilobytes (KiB), or megabytes (MiB) (mandatory parameter)
-m, --min-io-size=<bytes> minimum input/output unit size of the flash in bytes
-s, --sub-page-size=<bytes> minimum input/output unit used for UBI headers, e.g. sub-page size in case of NAND flash (equivalent to the minimum input/output unit size by default)
-O, --vid-hdr-offset=<num> offset if the VID header from start of the physical eraseblock (default is the next minimum I/O unit or sub-page after the EC header)
-e, --erase-counter=<num> the erase counter value to put to EC headers (default is )
-x, --ubi-ver=<num> UBI version number to put to EC headers (default is )
-Q, --image-seq=<num> -bit UBI image sequence number to use
(by default a random number is picked)
-v, --verbose be verbose
-h, --help print help message
-V, --version print program version

2.重要选项-p -m -s -O -e

-p 指定flash的物理擦除块大小

-m 指定flash的最小输入输出单元,当为nor flash时，此值应指定为1，当为nand flash时此值应指定为页面大小

-s 指定子页大小,当为nor flash时，此值应指定为1，当为nand flash时需指定此值为nand flash的子页大小

-O 指定vid header的偏移量

-e 指定放在EC头中的擦除计数器值,默认为0

3.ubinize这个工具存在什么意义？

既然有了mkfs.ubifs,为什么又出现了ubinize这个工具，只有经过ubinize处理过的镜像文件烧写到flash中后,ubi工具才能正确处理这些存储在flash中的数据