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DM8168烧写uboot时有问题,提示A8不能设break piont



我用CCS 6来烧写uboot进DM8168,在load nand-flash-writer.out的时候出现了以下错误信息:

CortexA8: Trouble Setting Breakpoint with the Action "Process CIO" at 0x8000ae98: (Error -1066 @ 0x333C) Unable to set/clear requested breakpoint. Verify that the breakpoint address is in valid memory. (Emulation package 5.1.641.0)

以前是正常能烧写的,现在完全一摸一样的操作,就不行了,麻烦看看什么回事。