{"id":44271,"date":"2023-10-04T11:40:46","date_gmt":"2023-10-04T03:40:46","guid":{"rendered":"https:\/\/www.techphant.cn\/?p=44271"},"modified":"2023-10-04T11:40:46","modified_gmt":"2023-10-04T03:40:46","slug":"dzdsyfl","status":"publish","type":"post","link":"https:\/\/www.techphant.cn\/blog\/44271.html","title":{"rendered":"DMA\u4e2d\u65ad\u4f7f\u7528\u8303\u4f8b"},"content":{"rendered":"

  DMA\uff08Direct Memory Access\uff09\u4e2d\u65ad\u662f\u4e00\u79cd\u7528\u4e8e\u63a7\u5236\u5916\u8bbe\u548c\u5185\u5b58\u4e4b\u95f4\u7684\u5feb\u901f\u6570\u636e\u4f20\u8f93\u7684\u6280\u672f\u3002\u5b83\u53ef\u4ee5\u51cf\u5c11CPU\u7684\u5de5\u4f5c\u8d1f\u8377\uff0c\u63d0\u9ad8\u7cfb\u7edf\u7684\u5904\u7406\u6548\u7387\uff0c\u662f\u4e00\u79cd\u975e\u5e38\u6709\u7528\u7684\u6280\u672f\u3002\u672c\u6587\u5c06\u4ecb\u7ecdDMA\u4e2d\u65ad\u7684\u4f7f\u7528\u8303\u4f8b\uff0c\u5e2e\u52a9\u8bfb\u8005\u66f4\u597d\u5730\u7406\u89e3\u548c\u4f7f\u7528DMA\u4e2d\u65ad\u3002<\/p>\n

\u4ec0\u4e48\u662fDMA\u4e2d\u65ad\uff1f<\/h2>\n

  DMA\u4e2d\u65ad\u662f\u4e00\u79cd\u7528\u4e8e\u63a7\u5236\u5916\u8bbe\u548c\u5185\u5b58\u4e4b\u95f4\u7684\u5feb\u901f\u6570\u636e\u4f20\u8f93\u7684\u6280\u672f\u3002\u5b83\u53ef\u4ee5\u8ba9\u5916\u8bbe\u76f4\u63a5\u5c06\u6570\u636e\u5b58\u50a8\u5230\u5185\u5b58\u4e2d\uff0c\u800c\u4e0d\u9700\u8981\u901a\u8fc7CPU\uff0c\u4ece\u800c\u51cf\u5c11\u4e86CPU\u7684\u5de5\u4f5c\u8d1f\u8377\uff0c\u63d0\u9ad8\u4e86\u7cfb\u7edf\u7684\u5904\u7406\u6548\u7387\u3002<\/p>\n

DMA\u4e2d\u65ad\u7684\u5de5\u4f5c\u539f\u7406<\/h2>\n

  DMA\u4e2d\u65ad\u7684\u5de5\u4f5c\u539f\u7406\u5f88\u7b80\u5355\uff0c\u5b83\u7684\u4e3b\u8981\u6b65\u9aa4\u5982\u4e0b\uff1a<\/p>\n