串口打印此次如下，
U-Boot 1.1.6 (Nov 26 2010 - 08:49:16)
DRAM: 64 MB
Flash: 0 kB
NAND: 256 MiB
In: serial
Out: serial
Err: serial
UPLLVal [M:38h,P:2h,S:2h]
MPLLVal [M:5ch,P:1h,S:1h]
CLKDIVN:5h
+---------------------------------------------+
| S3C2440A USB Downloader ver R0.03 2004 Jan |
+---------------------------------------------+
USB: IN_ENDPOINT:1 OUT_ENDPOINT:3
FORMAT:
+++
NOTE: Power off/on or press the reset button for 1 sec
in order to get a valid USB device address.
Hit any key to stop autoboot: 0
Booting Linux ...
NAND read: device 0 offset 0x60000, size 0x200000
reading NAND page at offset 0x60000 failed
Could not read entire image due to bad blocks
2097152 bytes read: ERROR
## Booting image at 30007fc0 ...
Bad Magic Number
##### 100ask Bootloader for OpenJTAG #####
[n] Download u-boot to Nand Flash
[k] Download Linux kernel uImage
[j] Download root_jffs2 image
[y] Download root_yaffs image
[d] Download to SDRAM & Run
[z] Download zImage into RAM
[g] Boot linux from RAM
[f] Format the Nand Flash
Set the boot parameters
Boot the system
[r] Reboot u-boot
[q] Quit from menu
Enter your selection:
直接跳到menu菜单了，没有烧写成功。之前还可以显示企鹅界面，现在啥都不显示了。求解。三克油。
