In: serial
Out: serial
Err: serial
Hit any key to stop autoboot: 0
hujun2410=> tftp 30005000 u-boot.bin.debug
TFTP from server 59.69.74.87; our IP address is 59.69.75.186
Filename 'u-boot.bin.debug'.
Load address: 0x30005000
Loading: ########################
done
Bytes transferred = 121840 (1dbf0 hex)
hujun2410=> nand erase 0 20000