00. 目录
01. 烧写内核
1.1 在minicom中输入如下命令
DengJin # dnw 40008000
OTG cable Connected!
Now, Waiting for DNW to transmit data
1.2 PC端下载zImage
[root@itcast linux-3.5_analyse]# dnw arch/arm/boot/zImage
load address: 0x57E00000
Writing data...
100% 0x0048FCF2 bytes (4671 K)
speed: 1.175104M/S
[root@itcast linux-3.5_analyse]#
1.3 将内核写到SD卡
DengJin # movi write kernel 0 40008000
writing kernel..device 0 Start 1057, Count 12288
MMC write: dev # 0, block # 1057, count 12288 ... 12288 blocks written: OK
completed
DengJin #
1.4 修改启动参数
DengJin # set bootcmd "movi read kernel 0 40008000;bootm 40008000"
DengJin # save
Saving Environment to SMDK bootable device...
done
DengJin #
02. 启动文件系统
2.1 设置启动参数
# 设置bootargs参数
DengJin # set bootargs root=/dev/nfs nfsroot=172.16.0.53:/filesystem ip=172.16.0.251
console=ttySAC0,115200 lcd=S70 ctp=2
DengJin # save
Saving Environment to SMDK bootable device...
done
# 显示环境变量
DengJin # printenv
baudrate=115200
bootargs=root=/dev/nfs nfsroot=172.16.0.53:/filesystem ip=172.16.0.251
console=ttySAC0,115200 lcd=S70 ctp=2
bootcmd=movi read kernel 0 40008000;bootm 40008000
bootdelay=3
ethaddr=00:40:5c:26:0a:5b
gatewayip=192.168.0.1
ipaddr=192.168.0.20
netmask=255.255.255.0
serverip=192.168.0.10
Environment size: 693/16380 bytes
DengJin #
最小网络文件系统制作请参考附录。
03. 烧写Qt文件系统到EMMC
3.1 格式化第四个分区
# 前提条件是启动最小网络文件系统
# 在minicom中输入
[root@itcast /]# mkfs.ext2 /dev/mmcblk0p4
Filesystem label=
OS type: Linux
Block size=4096 (log=2)
Fragment size=4096 (log=2)
33280 inodes, 132825 blocks
6641 blocks (5%) reserved for the super user
First data block=0
Maximum filesystem blocks=4194304
5 block groups
32768 blocks per group, 32768 fragments per group
6656 inodes per group
Superblock backups stored on blocks:
32768, 98304
3.2 压缩文件系统
# PC端
[root@itcast qtrootfs]# tar -cjvf qt.tar.bz2 *
[root@itcast qtrootfs]# mv qt.tar.bz2 /filesystem/
[root@itcast qtrootfs]#
3.3 挂载系统分区到/mnt目录
# minicom
[root@itcast /]# mount /dev/mmcblk0p4 /mnt
[root@itcast /]#
3.4 解压文件系统到/mnt目录
# minicom
[root@itcast /]# tar -xjvf qt.tar.bz2 -C /mnt
3.5 解除挂载和同步
# minicom
[root@itcast /]# sync
[root@itcast /]# umount /mnt
[root@itcast /]#
3.6 重启进入uboot
# minicom
[root@itcast /]# reboot
[root@itcast /]# [ OK
U-Boot 2010.12 (Jun 04 2020 - 20:12:26) for TINY4412
CPU: S5PC220 [Samsung SOC on SMP Platform Base on ARM CortexA9]
APLL = 1400MHz, MPLL = 800MHz
Board: UPLOOKING4412
DRAM: 1023 MiB
vdd_arm: 1.2
vdd_int: 1.0
vdd_mif: 1.1
BL1 version: N/A (TrustZone Enabled BSP)
Checking Boot Mode ... SDMMC
REVISION: 1.1
MMC Device 0: 7580 MB
MMC Device 1: 3728 MB
MMC Device 2: N/A
Net: No ethernet found.
Hit any key to stop autoboot: 0
DengJin #
3.7 设置启动参数
# minicom
DengJin # set bootargs "root=/dev/mmcblk0p4 console=ttySAC0,115200 lcd=S70 ctp=2"
DengJin # save
Saving Environment to SMDK bootable device...
done
DengJin #
3.8 重启
# minicom 拔掉网线测试 如果能够进入最小网络文件系统表示OK
DengJin #
DengJin # reset
3.9 测试
拔掉网线 能够启动Qt文件系统
04. 问题讨论
05. 参考
5.1 最小网络文件系统制作
5.2 Qt文件系统