{"id":62317,"date":"2023-10-26T20:59:40","date_gmt":"2023-10-26T12:59:40","guid":{"rendered":"https:\/\/www.techphant.cn\/?p=62317"},"modified":"2023-10-26T20:59:40","modified_gmt":"2023-10-26T12:59:40","slug":"djshcqzzgl","status":"publish","type":"post","link":"https:\/\/www.techphant.cn\/blog\/62317.html","title":{"rendered":"DMA\u63a5\u6536\u7f13\u51b2\u533a\u6307\u9488\u5f52\u96f6"},"content":{"rendered":"<p>&emsp;&emsp;DMA\uff08Direct Memory Access\uff09\u662f\u4e00\u79cd\u9ad8\u6548\u7684\u5b58\u50a8\u5668\u8bbf\u95ee\u6280\u672f\uff0c\u5b83\u53ef\u4ee5\u8ba9\u5916\u8bbe\u76f4\u63a5\u8bbf\u95ee\u4e3b\u673a\u5b58\u50a8\u5668\uff0c\u800c\u4e0d\u9700\u8981\u4e3b\u673a\u7684\u53c2\u4e0e\u3002\u5728DMA\u6280\u672f\u4e2d\uff0c\u7f13\u51b2\u533a\u6307\u9488\uff08Buffer 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center;\">DMA\u63a5\u6536\u7f13\u51b2\u533a\u6307\u9488\u5f52\u96f6\u7684\u5b9e\u73b0\u65b9\u5f0f<\/h2>\n<h3>&emsp;&emsp;\u786c\u4ef6\u5b9e\u73b0<\/h3>\n<p>&emsp;&emsp;\u5728\u786c\u4ef6\u5b9e\u73b0\u7684\u65b9\u5f0f\u4e2d\uff0cDMA\u63a5\u6536\u7f13\u51b2\u533a\u6307\u9488\u5f52\u96f6\u53ef\u4ee5\u901a\u8fc7\u8bbe\u7f6eDMA\u63a7\u5236\u5668\u7684\u63a7\u5236\u5bc4\u5b58\u5668\u6765\u5b9e\u73b0\u3002\u901a\u5e38\uff0cDMA\u63a7\u5236\u5668\u7684\u63a7\u5236\u5bc4\u5b58\u5668\u4e2d\u4f1a\u6709\u4e00\u4e2a\u7279\u6b8a\u7684\u4f4d\uff0c\u7528\u4e8e\u8bbe\u7f6eDMA\u4f20\u8f93\u5b8c\u6210\u540e\u662f\u5426\u9700\u8981\u5c06\u7f13\u51b2\u533a\u6307\u9488\u5f52\u96f6\u3002\u5f53\u8be5\u4f4d\u7f6e1\u65f6\uff0cDMA\u4f20\u8f93\u5b8c\u6210\u540e\u4f1a\u5c06\u7f13\u51b2\u533a\u6307\u9488\u5f52\u96f6\uff1b\u5f53\u8be5\u4f4d\u7f6e0\u65f6\uff0cDMA\u4f20\u8f93\u5b8c\u6210\u540e\u4e0d\u4f1a\u5c06\u7f13\u51b2\u533a\u6307\u9488\u5f52\u96f6\u3002<\/p>\n<h3>&emsp;&emsp;\u8f6f\u4ef6\u5b9e\u73b0<\/h3>\n<p>&emsp;&emsp;\u5728\u8f6f\u4ef6\u5b9e\u73b0\u7684\u65b9\u5f0f\u4e2d\uff0cDMA\u63a5\u6536\u7f13\u51b2\u533a\u6307\u9488\u5f52\u96f6\u53ef\u4ee5\u901a\u8fc7\u7f16\u5199\u4e00\u6bb5\u7a0b\u5e8f\u6765\u5b9e\u73b0\u3002\u5728DMA\u4f20\u8f93\u5b8c\u6210\u540e\uff0c\u7a0b\u5e8f\u4f1a\u5c06\u7f13\u51b2\u533a\u6307\u9488\u8bbe\u7f6e\u4e3a0\uff0c\u4ee5\u4fbf\u4e0b\u4e00\u6b21DMA\u4f20\u8f93\u4ece0\u5f00\u59cb\u3002<\/p>\n<h2 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