构建openwrt

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Steps:

准备工作:

下载openwrt源码: git clone git://git.openwrt.org/openwrt.git

Step1:编译openwrt源码

先执行make menuconfig命令,然后有下列几个地方要更改:

• 选择Target System为llwinner A1x/A20/A3x
• 选择Target Profile为Cubietruck
• 选择Target Images,设置Boot大小与Root大小(我用的是4G卡,Boot设置为100M,Root设置为3600M)

然后保存生成.config文件

接下来执行make -j8 (我的机子是双核四线程的,总共8个线程,so..j8)

Step2:为SD卡分区

使用命令:fdisk /dev/sdb (注:sdb为我机子SD卡的盘符,其他因机子而异)

创建两个分区 /dev/sdb1 与 /dev/sdb2,分别为boot分区与root分区,具体大小看你Step1所编译的大小

将第一个分区格式化为vfat格式:  mkfs.vfat /dev/sdb1

Step3:写卡系统

以下操作都是基于下面表完成的.

SD layout

SD layout with 512 byte blocks:

1.将spl写到CD卡第8k内存处:

dd if=bin/sunxi/uboot-sunxi-Cubietruck/openwrt-sunxi-Cubietruck-u-boot-with-spl.bin of=/dev/sdb bs=1024 seek=8

2.挂载/dev/sdb1到/mnt

mount -t vfat /dev/sdb1 /mnt

3.复制boot相关文件到/mnt

cp bin/sunxi/uboot-sunxi-Cubietruck/openwrt-sunxi-Cubietruck-uEnv.txt /mnt/uEnv.txt

cp bin/sunxi/sun7i-a20-cubietruck.dtb /mnt/dtb

cp bin/sunxi/openwrt-sunxi-uImage /mnt/uImage

4.重定义root系统文件的大小(刚才在make menuconfig那定义了,现在可以不用执行)

resize2fs bin/sunxi/openwrt-sunxi-root.ext4 3600M

5.将root根文件系统写道/dev/sdb2

dd if=bin/sunxi/openwrt-sunxi-root.ext4 of=/dev/sdb2 bs=128k

6.将缓存内容写到SD卡,并卸载/mnt

sync

umount /mnt

END

以上方法如果失败,Step3直接换成以下命令:

dd if=bin/sunxi/openwrt-sunxi-Cubietruck-sdcard-vfat-ext4.img of=/dev/sdb

?

参考资料:

• http://wiki.openwrt.org/doc/hardware/soc/soc.allwinner.sunxi
• http://www.geek-workshop.com/thread-10755-1-1.html

来自为知笔记(Wiz)