谢谢你的回复，问题解决了，DDR的那几个电阻焊错了，但是目前出现一个新问题，运行到第二个uboot时候，每次到DCACHE就不动了，打印信息如下：
U-Boot 2010.06 (Aug 15 2016 - 23:20:13) DM385_IPNC_3.80.00
DM385-GP rev 1.1
ARM clk: 600MHz
DDR clk: 533MHz
L3 clk: 200MHz
IVA clk: 450MHz
ISS clk: 400MHz
DSP Default OFF
DSS Default OFF
DRAM: 2 GiB
DCACHE: Off
NAND: HW ECC BCH8 Selected
256 MiB
Using default environment
The 2nd stage U-Boot will now be auto-loaded
Please do not interrupt the countdown till DM385_IPNC prompt if 2nd stage is alr
eady flashed
Hit any key to stop autoboot: 0
NAND read: device 0 offset 0x20000, size 0x40000
262144 bytes read: OK
## Starting application at 0x81000000 ...
U-Boot 2010.06 (Aug 15 2016 - 23:20:41) DM385_IPNC_3.80.00
DM385-GP rev 1.1
ARM clk: 600MHz
DDR clk: 533MHz
L3 clk: 200MHz
IVA clk: 450MHz
ISS clk: 400MHz
DSP Default OFF
DSS Default OFF
I2C: ready
DRAM: 2 GiB
DCACHE: