我用spi启动开发板，进入u-boot命令操作，tftp c0700000 uImage ，然后md c0700000。出现下面
Hit any key to stop autoboot: 0
U-Boot > md 0xc0700000
c0700000: 56190527 edf33e8a 93acd94f f8d32100 '..V.>..O....!..
c0700010: 008000c0 008000c0 51cbb308 00020205 ...........Q....
c0700020: 756e694c 2e322d78 37332e36 00000000 Linux-2.6.37....
c0700030: 00000000 00000000 00000000 00000000 ................
然后
U-Boot > sf probe 0
SF: Detected M25P64 with page size 256, total 8 MiB
8192 KiB M25P64 at 0:0 is now current device
然后
U-Boot >sf erase 200000 200000
U-Boot > sf write 0xc0700000 0x200000 0x200000
U-Boot > md 0x00200000
00200000: 00000000 00000000 00000000 00000000 ................
00200010: 00000000 00000000 00000000 00000000 ................
00200020: 00000000 00000000 00000000 00000000 ................
不是应该成功将0xc0700000 的内容写入到0x200000。但0x200000不是uImage的内容
