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dm368 uboot烧写ubl



现在在dm368的项目中想实现通过SD卡向烧录nandflash烧录ubl、uboot、以及文件系统,内核的功能,现在的思路就是在从SD卡启动后,由uboot去烧录ubl、uboot等,测试过后,通过uboot烧录ubl(用命令 nand write),系统不能启动,请问,当前在uboot中烧录ubl是否可行?