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8168GPMC模块中为DP-RAM(双端口ram)分 片选后 数据不能读写!?



请问在GPMC模块中分片选时候为什么分过之后里面的数据不能度不能写呢?

还有就是在分片选时,基地址是怎样确定的啊? 我在板子上测试情况是只能使000000或者和掩码位一样,有没有做过这一块的朋友啊给指点下,

不胜感激!!