00. 目錄
01. 燒寫內核
1.1 在minicom中輸入如下命令
DengJin # dnw 40008000
OTG cable Connected!
Now, Waiting for DNW to transmit data
1.2 PC端下載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 將內核寫到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 修改啓動參數
DengJin # set bootcmd "movi read kernel 0 40008000;bootm 40008000"
DengJin # save
Saving Environment to SMDK bootable device...
done
DengJin #
02. 啓動文件系統
2.1 設置啓動參數
# 設置bootargs參數
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
# 顯示環境變量
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 #
最小網絡文件系統製作請參考附錄:【Tiny4412】最小網絡文件系統製作
03. 燒寫文件系統到SD卡
3.1 格式化第二個分區
# 前提條件是啓動最小網絡文件系統
# 在minicom中輸入
[root@itcast /]# mkfs.ext2 /dev/mmcblk0p2
Filesystem label=
OS type: Linux
Block size=1024 (log=0)
Fragment size=1024 (log=0)
83640 inodes, 333960 blocks
16698 blocks (5%) reserved for the super user
First data block=1
Maximum filesystem blocks=524288
41 block groups
8192 blocks per group, 8192 fragments per group
2040 inodes per group
Superblock backups stored on blocks:
8193, 24577, 40961, 57345, 73729, 204801, 221185
[root@itcast /]#
3.2 壓縮文件系統
# PC端
[root@itcast filesystem]# tar -cjvf filesystem.tar.bz2 *
3.3 掛載系統分區到/mnt目錄
# minicom
[root@itcast /]# mount /dev/mmcblk0p2 /mnt
[root@itcast /]#
3.4 解壓文件系統到/mnt目錄
# minicom
[root@itcast /]# tar -xjvf filesystem.tar.bz2 -C /mnt
3.5 解除掛載和同步
# minicom
[root@itcast /]# sync
[root@itcast /]# umount /mnt
[root@itcast /]#
3.6 重啓進入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 設置啓動參數
# minicom
DengJin # set bootargs "root=/dev/mmcblk0p2 console=ttySAC0,115200 lcd=S70 ctp=2"
DengJin # save
Saving Environment to SMDK bootable device...
done
DengJin #
3.8 重啓
# minicom 拔掉網線測試 如果能夠進入最小網絡文件系統表示OK
DengJin #
DengJin # reset
3.9 測試
# 拔掉網線 能夠啓動最小文件系統
===============================
welcom to dengjin system
===============================
[root@itcast /]#
[root@itcast /]#
[root@itcast /]#
[root@itcast /]#
[root@itcast /]#
[root@itcast /]#
04. 問題討論
05. 參考
5.1 最小網絡文件系統製作