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am3359 nand启动不打印spl信息

sd卡启动正常,在sd卡启动下(10111),用uboot烧写MLO,U-boot,uImage到nand中烧写成功,配置成nand启动(10010),串口没有任何输出,在UART0中有ccc打印。我尝试换成(10011),插上sd卡能启动,uImage为nand中的uImage。在(10011)下拔掉sd卡,也不能正常启动。想请问是什么原因导致无法nand启动。

U-Boot #mmc rescan

U-Boot #nand erase 0x0 0x280000

U-Boot #fatload mmc 0 0x82000000 MLO

U-Boot #nand write 0x82000000 0x0 0x20000

U-Boot #fatload mmc 0 0x82000000 u-boot.img

U-Boot #nand write 0x82000000 0x80000 0x1E0000

U-Boot #nand erase 0x280000 0x500000

U-Boot #fatload mmc 0 0x82000000 uImage

U-Boot #nand write 0x82000000 0x280000 0x500000

x 出现错误。请重试或与管理员联系。