cd …/sd_fuse/tiny4412/ && sudo ./sd_fusing.sh /dev/mmcblk0
(…表示u-boot源码根目录，mmcblk0名称在不同系统中的名字有时会不一样)，
然后把SD卡插入，并让开发板从SD卡启动。
TINY4412 # fdisk -p 1
partion # size(MB) block start # block count partition_Id
1 695 6070812 1424478 0x0C
2 320 134244 656304 0x83
3 2057 790548 4213770 0x83
4 520 5004318 1066494 0x83
TINY4412 # fdisk -c 1 320 809 524
Count: 10000
Count: 9999
Count: 9998
Count: 9997
fdisk is completed
partion # size(MB) block start # block count partition_Id
1 1937 3527634 3967656 0x0C
2 320 134244 656304 0x83
3 812 790548 1663134 0x83
4 524 2453682 1073952 0x83
TINY4412 # fatformat mmc 1:1
Start format MMC&d partition&d …
Partition1: Start Address(0x35d3d2), Size(0x3c8aa8)
size checking …
Under 8G
write FAT info: 32
Fat size : 0xf22
Erase FAT region………………………………………….
Partition1 format complete.
TINY4412 # ext3format mmc 1:2
Start format MMC1 partition2 ….
** Partition2 is not ext2 file-system 1 **
Partition2: Start Address(0x20c64), Size(0xa03b0)
Start ext2format…
Wirte 0/3block-group
Reserved blocks for jounaling : 4102
Start write addr : 0x20c64
Erase inode table(0) - 0x20d24…………..
d_indirect_point:0x24874
Wirte 1/3block-group
Reserved blocks for jounaling : 4102
Start write addr : 0x60c64
Erase inode table(1) - 0x60d24…………..
Wirte 2/3block-group
Reserved blocks for jounaling : 4102
Start write addr : 0xa0c64
Erase inode table(2) - 0xa0c74…………..
TINY4412 # ext3format mmc 1:3
Start format MMC1 partition3 ….
** Partition3 is not ext2 file-system 1 **
Partition3: Start Address(0xc1014), Size(0x19609e)
Start ext2format…
Wirte 0/7block-group
Reserved blocks for jounaling : 4102
Start write addr : 0xc1014
Erase inode table(0) - 0xc11c4……………
d_indirect_point:0xc4f64
Wirte 1/7block-group
Reserved blocks for jounaling : 4102
Start write addr : 0x101014
Erase inode table(1) - 0x1011c4……………
Wirte 2/7block-group
Reserved blocks for jounaling : 4102
Start write addr : 0x141014
Erase inode table(2) - 0x141024……………
Wirte 3/7block-group
Reserved blocks for jounaling : 4102
Start write addr : 0x181014
Erase inode table(3) - 0x1811c4……………
Wirte 4/7block-group
Reserved blocks for jounaling : 4102
Start write addr : 0x1c1014
Erase inode table(4) - 0x1c1024……………
Wirte 5/7block-group
Reserved blocks for jounaling : 4102
Start write addr : 0x201014
Erase inode table(5) - 0x2011c4……………
Wirte 6/7block-group
Reserved blocks for jounaling : 4102
Start write addr : 0x241014
Erase inode table(6) - 0x241024……………
TINY4412 # ext3format mmc 1:4
Start format MMC1 partition4 ….
** Partition4 is not ext2 file-system 1 **
Partition4: Start Address(0x2570b2), Size(0x106320)
Start ext2format…
Wirte 0/5block-group
Reserved blocks for jounaling : 4102
Start write addr : 0x2570b2
Erase inode table(0) - 0x2571d2…………..
d_indirect_point:0x25acaa
Wirte 1/5block-group
Reserved blocks for jounaling : 4102
Start write addr : 0x2970b2
Erase inode table(1) - 0x2971d2…………..
Wirte 2/5block-group
Reserved blocks for jounaling : 4102
Start write addr : 0x2d70b2
Erase inode table(2) - 0x2d70c2…………..
Wirte 3/5block-group
Reserved blocks for jounaling : 4102
Start write addr : 0x3170b2
Erase inode table(3) - 0x3171d2…………..
Wirte 4/5block-group
Reserved blocks for jounaling : 4102
Start write addr : 0x3570b2
Erase inode table(4) - 0x3570c2…………..
TINY4412 # emmc open 1
eMMC OPEN Success.!!
!!!Notice!!!
!You must close eMMC boot Partition after all image writing!
!eMMC boot partition has continuity at image writing time.!
!So, Do not close boot partition, Before, all images is
written.!
TINY4412 # dnw 50000000
OTG cable Connected!
Now, Waiting for DNW to transmit data
Download Done!! Download Address: 0x50000000, Download
Filesize:0x2000
Checksum is being calculated.
Checksum O.K.
TINY4412 # mmc write 1 0x50000000 0 0x10
MMC write: dev # 1, block # 0, count 16 … 16 blocks written:
OK
TINY4412 # dnw 50000000
OTG cable Connected!
Now, Waiting for DNW to transmit data
Download Done!! Download Address: 0x50000000, Download
Filesize:0x3800
Checksum is being calculated.
Checksum O.K.
TINY4412 # mmc write 1 0x50000000 0x10 0x1c
MMC write: dev # 1, block # 16, count 28 … 28 blocks written:
OK
TINY4412 # dnw 0x50000000
OTG cable Connected!
Now, Waiting for DNW to transmit data
Download Done!! Download Address: 0x50000000, Download
Filesize:0x3ea64
Checksum is being calculated.
Checksum O.K.
TINY4412 # mmc write 1 0x50000000 0x30 0x21d
MMC write: dev # 1, block # 48, count 541 … 541 blocks
written: OK
TINY4412 # dnw 0x50000000
OTG cable Connected!
Now, Waiting for DNW to transmit data
Download Done!! Download Address: 0x50000000, Download
Filesize:0x17000
Checksum is being calculated.
Checksum O.K.
TINY4412 # mmc write 0x50000000 1 0x2c0 0xb8
MMC Device 1342177280: N/A
TINY4412 # mmc write 0x50000000 1 0x2c0 0xb8
MMC Device 1342177280: N/A
TINY4412 # emmc close
Usage:
Open/Close eMMC boot Partition
TINY4412 # emmc close 1
eMMC CLOSE Success.!!
在这里说下mmcwrite后面的四个参数，第一个参数：1（是指第一分区），
第二个参数：0x50000000是刚才用dnw下载到开发板RAM当中的文件地址，
第三个参数：是文件在emmc第一分区中的起始地址（以block为单位，即512B）
第四个参数：是文件所要占用的emmc空间（以block为单位，即512B）
emmc open 1 和emmc close 1是对emmc进行操作和停止操作的命令