u-boot没法识别板子上的多片flash

Question

板子上的两片Nor Flash都是SST39VF3201，板子自带的u-boot是0.4版本，我按照板子自带的u-boot里面的内容修改了1.3.4版本的u-boot里面的几个文件：include/configsat91rm9200dk.h、board/at91rm9200dk/at91rm9200dk.c、board/at91rm9200dk/flash.c，下载后显示如下：

U-Boot 1.3.4 (Jun  2 2011 - 10:53:03)

DRAM:  32 MB
SST: SST39VF3201 (32Mbit)
SST: Unkown Flash: 0x90, 0x90
Unknown Flash!

用板子自带的u-boot下载后显示：

U-Boot 0.4.0 (Apr 27 2005 - 19:26:55)

U-Boot code: 21F00000 -> 21F143A8  BSS: -> 21F22478
DRAM Configuration:
Bank #0: 20000000 32 MB
SST: SST39VF3201 (32Mbit)
SST: SST39VF3201 (32Mbit)
Flash:  8 MB
*** Warning - bad CRC, using default environment

In:    serial
Out:   serial
Err:   serial
Hit any key to stop autoboot:  0

哪位大侠遇到过这个问题呢？

Answer 1

困了好几天了！