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AM335x NAND文件破坏问题



基于AM335x平台的项目做了一批板子(200片),u-boot和操作系统等是固化在NANDFLASH中的。但是现场用了一段时间后出现了3块板子启动加载的问题,发现都是启动到u-boot这里就停止了,重新烧写u-boot到NAND后又正常跑起来了,请各位帮忙分析下,NAND中的u-boot部分坏掉的都有什么可能造成的呢?