{"id":58152,"date":"2023-10-18T01:12:44","date_gmt":"2023-10-17T17:12:44","guid":{"rendered":"https:\/\/www.techphant.cn\/blog\/58152.html"},"modified":"2023-10-18T01:12:44","modified_gmt":"2023-10-17T17:12:44","slug":"dzdhdhs","status":"publish","type":"post","link":"https:\/\/www.techphant.cn\/blog\/58152.html","title":{"rendered":"DMA\u4e2d\u65ad\u56de\u8c03\u51fd\u6570"},"content":{"rendered":"<p>&emsp;&emsp;DMA\uff08Direct Memory Access\uff09\u4e2d\u65ad\u56de\u8c03\u51fd\u6570\u662f\u7cfb\u7edf\u4e2d\u91cd\u8981\u7684\u4e00\u90e8\u5206\uff0c\u5b83\u662f\u8ba1\u7b97\u673a\u786c\u4ef6\u548c\u8f6f\u4ef6\u4e4b\u95f4\u7684\u6865\u6881\u3002\u8fd9\u79cd\u56de\u8c03\u51fd\u6570\u5141\u8bb8\u786c\u4ef6\u548c\u8f6f\u4ef6\u4e4b\u95f4\u8fdb\u884c\u4ea4\u4e92\uff0c\u4ee5\u4fbf\u5728\u5904\u7406\u590d\u6742\u4efb\u52a1\u65f6\u83b7\u5f97\u66f4\u597d\u7684\u6548\u679c\u3002\u672c\u6587\u5c06\u4ecb\u7ecdDMA\u4e2d\u65ad\u56de\u8c03\u51fd\u6570\u7684\u5de5\u4f5c\u539f\u7406\uff0c\u4ee5\u53ca\u5b83\u5728\u8ba1\u7b97\u673a\u7cfb\u7edf\u4e2d\u7684\u91cd\u8981\u4f5c\u7528\u3002<\/p>\n<h2 style=\"text-align: center;\">DMA\u4e2d\u65ad\u56de\u8c03\u51fd\u6570\u7684\u5de5\u4f5c\u539f\u7406<\/h2>\n<p>&emsp;&emsp;DMA\u4e2d\u65ad\u56de\u8c03\u51fd\u6570\u662f\u4e00\u79cd\u7279\u6b8a\u7684\u7a0b\u5e8f\uff0c\u7531\u786c\u4ef6\u8c03\u7528\uff0c\u5728\u786c\u4ef6\u5b8c\u6210\u67d0\u4e9b\u64cd\u4f5c\u540e\u89e6\u53d1\u3002\u5b83\u53ef\u4ee5\u7528\u4e8e\u5c06\u786c\u4ef6\u7684\u8f93\u51fa\u4e0e\u8f6f\u4ef6\u7684\u8f93\u5165\u8fdb\u884c\u8fde\u63a5\uff0c\u4ece\u800c\u5b9e\u73b0\u8f6f\u4ef6\u548c\u786c\u4ef6\u4e4b\u95f4\u7684\u4ea4\u4e92\u3002<\/p>\n<p>&emsp;&emsp;\u5177\u4f53\u6765\u8bf4\uff0c\u5f53\u786c\u4ef6\u5b8c\u6210\u67d0\u4e9b\u64cd\u4f5c\u65f6\uff0c\u5b83\u4f1a\u53d1\u51faDMA\u4e2d\u65ad\u3002\u6b64\u65f6\uff0c\u64cd\u4f5c\u7cfb\u7edf\u4f1a\u68c0\u6d4b\u5230\u8fd9\u4e2a\u4e2d\u65ad\uff0c\u5e76\u6267\u884c\u76f8\u5e94\u7684\u56de\u8c03\u51fd\u6570\uff0c\u4ee5\u5b8c\u6210\u786c\u4ef6\u548c\u8f6f\u4ef6\u4e4b\u95f4\u7684\u4ea4\u4e92\u3002<\/p>\n<p>&emsp;&emsp;DMA\u4e2d\u65ad\u56de\u8c03\u51fd\u6570\u7684\u5de5\u4f5c\u539f\u7406\u53ef\u4ee5\u603b\u7ed3\u5982\u4e0b\uff1a\u5f53\u786c\u4ef6\u5b8c\u6210\u67d0\u4e9b\u64cd\u4f5c\u65f6\uff0c\u5b83\u4f1a\u53d1\u51faDMA\u4e2d\u65ad\uff1b\u64cd\u4f5c\u7cfb\u7edf\u68c0\u6d4b\u5230\u8fd9\u4e2a\u4e2d\u65ad\u540e\uff0c\u4f1a\u6267\u884c\u76f8\u5e94\u7684\u56de\u8c03\u51fd\u6570\uff0c\u4ee5\u5b8c\u6210\u786c\u4ef6\u548c\u8f6f\u4ef6\u4e4b\u95f4\u7684\u4ea4\u4e92\u3002<\/p>\n<h2 style=\"text-align: center;\">DMA\u4e2d\u65ad\u56de\u8c03\u51fd\u6570\u7684\u5e94\u7528<\/h2>\n<p>&emsp;&emsp;DMA\u4e2d\u65ad\u56de\u8c03\u51fd\u6570\u5728\u8ba1\u7b97\u673a\u7cfb\u7edf\u4e2d\u6709\u7740\u91cd\u8981\u7684\u4f5c\u7528\u3002\u5b83\u53ef\u4ee5\u63d0\u9ad8\u7cfb\u7edf\u7684\u6267\u884c\u6548\u7387\uff0c\u51cf\u5c11\u7cfb\u7edf\u7684\u5ef6\u8fdf\u3002\u4f8b\u5982\uff0c\u5728\u5904\u7406\u590d\u6742\u7684\u56fe\u5f62\u4efb\u52a1\u65f6\uff0cDMA\u4e2d\u65ad\u56de\u8c03\u51fd\u6570\u53ef\u4ee5\u63d0\u4f9b\u66f4\u597d\u7684\u6027\u80fd\uff0c\u4ee5\u6ee1\u8db3\u7cfb\u7edf\u7684\u8981\u6c42\u3002<\/p>\n<p>&emsp;&emsp;\u6b64\u5916\uff0cDMA\u4e2d\u65ad\u56de\u8c03\u51fd\u6570\u8fd8\u53ef\u4ee5\u7528\u4e8e\u5b9e\u73b0\u786c\u4ef6\u548c\u8f6f\u4ef6\u4e4b\u95f4\u7684\u4ea4\u4e92\uff0c\u4ece\u800c\u5b9e\u73b0\u66f4\u590d\u6742\u7684\u529f\u80fd\u3002\u4f8b\u5982\uff0c\u5b83\u53ef\u4ee5\u7528\u4e8e\u5b9e\u73b0\u865a\u62df\u5185\u5b58\u3001\u8bbe\u5907\u9a71\u52a8\u7a0b\u5e8f\u3001\u7f51\u7edc\u534f\u8bae\u6808\u7b49\u529f\u80fd\u3002<\/p>\n<h2 style=\"text-align: center;\">\u603b\u7ed3<\/h2>\n<p>&emsp;&emsp;<strong>DMA\u4e2d\u65ad\u56de\u8c03\u51fd\u6570\u662f\u7cfb\u7edf\u4e2d\u91cd\u8981\u7684\u4e00\u90e8\u5206\uff0c\u5b83\u662f\u8ba1\u7b97\u673a\u786c\u4ef6\u548c\u8f6f\u4ef6\u4e4b\u95f4\u7684\u6865\u6881\uff0c\u5141\u8bb8\u786c\u4ef6\u548c\u8f6f\u4ef6\u4e4b\u95f4\u8fdb\u884c\u4ea4\u4e92\uff0c\u4ee5\u4fbf\u5728\u5904\u7406\u590d\u6742\u4efb\u52a1\u65f6\u83b7\u5f97\u66f4\u597d\u7684\u6548\u679c\u3002<\/strong>\u5b83\u7684\u5de5\u4f5c\u539f\u7406\u662f\uff0c\u5f53\u786c\u4ef6\u5b8c\u6210\u67d0\u4e9b\u64cd\u4f5c\u65f6\uff0c\u5b83\u4f1a\u53d1\u51faDMA\u4e2d\u65ad\uff0c\u64cd\u4f5c\u7cfb\u7edf\u4f1a\u68c0\u6d4b\u5230\u8fd9\u4e2a\u4e2d\u65ad\uff0c\u5e76\u6267\u884c\u76f8\u5e94\u7684\u56de\u8c03\u51fd\u6570\uff0c\u4ee5\u5b8c\u6210\u786c\u4ef6\u548c\u8f6f\u4ef6\u4e4b\u95f4\u7684\u4ea4\u4e92\u3002DMA\u4e2d\u65ad\u56de\u8c03\u51fd\u6570\u5728\u8ba1\u7b97\u673a\u7cfb\u7edf\u4e2d\u6709\u7740\u91cd\u8981\u7684\u4f5c\u7528\uff0c\u53ef\u4ee5\u63d0\u9ad8\u7cfb\u7edf\u7684\u6267\u884c\u6548\u7387\uff0c\u51cf\u5c11\u7cfb\u7edf\u7684\u5ef6\u8fdf\uff0c\u5e76\u53ef\u4ee5\u7528\u4e8e\u5b9e\u73b0\u786c\u4ef6\u548c\u8f6f\u4ef6\u4e4b\u95f4\u7684\u4ea4\u4e92\uff0c\u4ece\u800c\u5b9e\u73b0\u66f4\u590d\u6742\u7684\u529f\u80fd\u3002<\/p>\n","protected":false},"excerpt":{"rendered":"<p>DMA\uff08DirectMemoryAccess\uff09\u4e2d\u65ad\u56de\u8c03\u51fd\u6570\u662f\u7cfb\u7edf\u4e2d\u91cd\u8981\u7684\u4e00\u90e8\u5206\uff0c\u5b83\u662f\u8ba1\u7b97\u673a\u786c\u4ef6\u548c\u8f6f\u4ef6\u4e4b\u95f4\u7684\u6865\u6881\u3002\u8fd9\u79cd\u56de\u8c03\u51fd\u6570\u5141\u8bb8\u786c\u4ef6\u548c\u8f6f\u4ef6\u4e4b\u95f4\u8fdb\u884c\u4ea4\u4e92\uff0c\u4ee5\u4fbf\u5728\u5904\u7406\u590d\u6742<\/p>\n","protected":false},"author":1,"featured_media":4132,"comment_status":"closed","ping_status":"closed","sticky":false,"template":"","format":"standard","meta":{"site-sidebar-layout":"default","site-content-layout":"default","ast-global-header-display":"","ast-main-header-display":"","ast-hfb-above-header-display":"","ast-hfb-below-header-display":"","ast-hfb-mobile-header-display":"","site-post-title":"","ast-breadcrumbs-content":"","ast-featured-img":"","footer-sml-layout":"","theme-transparent-header-meta":"","adv-header-id-meta":"","stick-header-meta":"","header-above-stick-meta":"","header-main-stick-meta":"","header-below-stick-meta":"","footnotes":""},"categories":[36],"tags":[305],"class_list":["post-58152","post","type-post","status-publish","format-standard","has-post-thumbnail","hentry","category-blog","tag-dzjs"],"_links":{"self":[{"href":"https:\/\/www.techphant.cn\/wp-json\/wp\/v2\/posts\/58152","targetHints":{"allow":["GET"]}}],"collection":[{"href":"https:\/\/www.techphant.cn\/wp-json\/wp\/v2\/posts"}],"about":[{"href":"https:\/\/www.techphant.cn\/wp-json\/wp\/v2\/types\/post"}],"author":[{"embeddable":true,"href":"https:\/\/www.techphant.cn\/wp-json\/wp\/v2\/users\/1"}],"replies":[{"embeddable":true,"href":"https:\/\/www.techphant.cn\/wp-json\/wp\/v2\/comments?post=58152"}],"version-history":[{"count":0,"href":"https:\/\/www.techphant.cn\/wp-json\/wp\/v2\/posts\/58152\/revisions"}],"wp:featuredmedia":[{"embeddable":true,"href":"https:\/\/www.techphant.cn\/wp-json\/wp\/v2\/media\/4132"}],"wp:attachment":[{"href":"https:\/\/www.techphant.cn\/wp-json\/wp\/v2\/media?parent=58152"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"https:\/\/www.techphant.cn\/wp-json\/wp\/v2\/categories?post=58152"},{"taxonomy":"post_tag","embeddable":true,"href":"https:\/\/www.techphant.cn\/wp-json\/wp\/v2\/tags?post=58152"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}