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有关C6657地址的问题



您好,关于c6657多核的地址问题,我一直不是很懂,现在看一段程序,有点疑问

在采用EDMA搬运数据的时候,传入的地址参数需要全局化,这是什么意思,代码如下:

希望得到您的解答,谢谢!