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5402 dma



通过dma0 把从 Mcbsp 收到数据存到buffer 里,如果buffer 在0x4000地址以内,是可以,把buffer 放到 0x4000以后就不行(就片外sram)。本以为是外界sram 不对. 而不过dsp 能访问片外ram。 我想问问各位大侠,dsp 访问 和 dma 访问外部数据存储器有什么区别。