{"id":32735,"date":"2023-09-17T18:56:50","date_gmt":"2023-09-17T10:56:50","guid":{"rendered":"https:\/\/www.techphant.cn\/?p=32735"},"modified":"2023-09-17T18:56:50","modified_gmt":"2023-09-17T10:56:50","slug":"ckdzdyckjszd","status":"publish","type":"post","link":"https:\/\/www.techphant.cn\/blog\/32735.html","title":{"rendered":"\u4e32\u53e3DMA\u4e2d\u65ad\u4e0e\u4e32\u53e3\u63a5\u6536\u4e2d\u65ad"},"content":{"rendered":"

  \u4e32\u53e3DMA\u4e2d\u65ad\u548c\u4e32\u53e3\u63a5\u6536\u4e2d\u65ad\u662f\u8ba1\u7b97\u673a\u786c\u4ef6\u4e2d\u5e38\u7528\u7684\u4e24\u79cd\u4e2d\u65ad\u65b9\u5f0f\uff0c\u5b83\u4eec\u90fd\u662f\u4e32\u53e3\u901a\u4fe1\u7684\u91cd\u8981\u7ec4\u6210\u90e8\u5206\uff0c\u5728\u5b9e\u9645\u5e94\u7528\u4e2d\u6709\u7740\u91cd\u8981\u7684\u4f5c\u7528\u3002\u672c\u6587\u5c06\u5c31\u4e24\u79cd\u4e2d\u65ad\u65b9\u5f0f\u7684\u5de5\u4f5c\u539f\u7406\u3001\u4f18\u7f3a\u70b9\u53ca\u5176\u5e94\u7528\u573a\u666f\u8fdb\u884c\u6df1\u5165\u5256\u6790\uff0c\u4ee5\u4fbf\u5e2e\u52a9\u8bfb\u8005\u66f4\u597d\u5730\u7406\u89e3\u4e24\u79cd\u4e2d\u65ad\u65b9\u5f0f\u7684\u533a\u522b\u3002<\/p>\n

\u4e32\u53e3DMA\u4e2d\u65ad<\/h2>\n

  \u4e32\u53e3DMA\u4e2d\u65ad\uff0c\u662f\u6307\u5728\u4e32\u53e3\u901a\u4fe1\u8fc7\u7a0b\u4e2d\uff0c\u4f7f\u7528DMA\uff08Direct Memory Access\uff09\u6280\u672f\u8fdb\u884c\u6570\u636e\u4f20\u8f93\u7684\u4e2d\u65ad\u65b9\u5f0f\u3002DMA\u6280\u672f\u53ef\u4ee5\u4f7f\u5f97\u7cfb\u7edf\u53ef\u4ee5\u76f4\u63a5\u8bbf\u95ee\u5185\u5b58\uff0c\u800c\u65e0\u9700\u5c06\u6570\u636e\u590d\u5236\u5230CPU\u4e2d\uff0c\u8fd9\u6837\u80fd\u591f\u5927\u5927\u51cf\u5c11CPU\u7684\u8d1f\u62c5\u3002\u4e32\u53e3DMA\u4e2d\u65ad\u7684\u5de5\u4f5c\u539f\u7406\u662f\uff1a\u5f53\u4e32\u53e3\u63a5\u6536\u5230\u6570\u636e\u65f6\uff0cDMA\u4f1a\u81ea\u52a8\u5c06\u6570\u636e\u590d\u5236\u5230\u6307\u5b9a\u7684\u5185\u5b58\u5730\u5740\uff0c\u540c\u65f6\u53d1\u51fa\u4e2d\u65ad\u4fe1\u53f7\uff0c\u4ee5\u901a\u77e5CPU\u5904\u7406\u6570\u636e\u3002<\/p>\n

\u4f18\u70b9<\/h3>\n