//定义SD卡设备，应该根据实际的设备信息进行修改 reader_type1="/dev/sdb" reader_type2="/dev/mmcblk0"
//如果没有参数，则显示帮助信息
if [ -z $1 ] then echo "usage: ./sd_fusing.sh <SD Reader‘s device file>" exit 0 fi //判断SD卡的设备类型，然后定义四个分区
if [ $1 = $reader_type1 ] then partition1="$11" partition2="$12" partition3="$13" partition4="$14" elif [ $1 = $reader_type2 ] then partition1="$1p1" partition2="$1p2" partition3="$1p3" partition4="$1p4"

else   //不能识别SD卡设备
    echo "Unsupported SD reader" exit 0 fi //判断设备是否存在，且是否是块设备
if [ -b $1 ] then echo "$1 reader is identified."
else echo "$1 is NOT identified." exit 0 fi //开始进行SD卡分区
# make partition echo "make sd card partition" echo "./sd_fdisk $1" ./sd_fdisk $1 dd iflag=dsync oflag=dsync if=sd_mbr.dat of=$1 rm sd_mbr.dat # format umount $partition1 2> /dev/null umount $partition2 2> /dev/null umount $partition3 2> /dev/null umount $partition4 2> /dev/null echo "mkfs.vfat -F 32 $partition1"  //建立一个fat32分区
mkfs.vfat -F 32 $partition1 //定义U-Boot的扇区位置
#<BL1 fusing> bl1_position=1 uboot_position=49

//将U-Boot的BL1（前8K）和U-Boot的校验和（uboot的前16字节）烧录进SD卡的bl1_position=1扇区
 echo "BL1 fusing" ./mkbl1 ../uboot_inand.bin SD-bl1-8k.bin 8192                           //计算uboot的校验和
dd iflag=dsync oflag=dsync if=SD-bl1-8k.bin of=$1 seek=$bl1_position    //烧录
rm SD-bl1-8k.bin //将整个U-Boot烧录进SD卡的uboot_position=49扇区
#<u-boot fusing> echo "u-boot fusing" dd iflag=dsync oflag=dsync if=../uboot_inand.bin of=$1 seek=$uboot_position //烧录成功信息提示
#<Message Display> echo "U-boot image is fused successfully." echo "Eject SD card and insert it again."