{"id":41992,"date":"2023-09-30T18:48:09","date_gmt":"2023-09-30T10:48:09","guid":{"rendered":"https:\/\/www.techphant.cn\/?p=41992"},"modified":"2023-09-30T18:48:09","modified_gmt":"2023-09-30T10:48:09","slug":"dltsszmyd","status":"publish","type":"post","link":"https:\/\/www.techphant.cn\/blog\/41992.html","title":{"rendered":"DMA\u6d41\u900f\u89c6\u662f\u600e\u4e48\u6837\u7684"},"content":{"rendered":"

  DMA\u6d41\u900f\u89c6\u662f\u4e00\u79cd\u6280\u672f\uff0c\u53ef\u4ee5\u5e2e\u52a9\u7528\u6237\u66f4\u6709\u6548\u5730\u7ba1\u7406\u3001\u5206\u6790\u548c\u63a7\u5236\u6570\u636e\u6d41\u3002\u5b83\u662f\u4e00\u79cd\u9ad8\u7ea7\u529f\u80fd\uff0c\u53ef\u4ee5\u5e2e\u52a9\u7528\u6237\u66f4\u597d\u5730\u63a7\u5236\u548c\u7ba1\u7406\u6570\u636e\u6d41\uff0c\u4ece\u800c\u63d0\u9ad8\u6570\u636e\u4f20\u8f93\u7684\u6548\u7387\u548c\u6027\u80fd\u3002\u672c\u6587\u5c06\u8be6\u7ec6\u4ecb\u7ecdDMA\u6d41\u900f\u89c6\u7684\u57fa\u672c\u539f\u7406\u3001\u529f\u80fd\u548c\u4f18\u52bf\uff0c\u4ee5\u53ca\u5b83\u4e0e\u5176\u4ed6\u6280\u672f\u7684\u6bd4\u8f83\u3002<\/p>\n

\u4ec0\u4e48\u662fDMA\u6d41\u900f\u89c6\uff1f<\/h2>\n

  DMA\u6d41\u900f\u89c6\u662f\u4e00\u79cd\u6280\u672f\uff0c\u53ef\u4ee5\u5e2e\u52a9\u7528\u6237\u66f4\u6709\u6548\u5730\u7ba1\u7406\u3001\u5206\u6790\u548c\u63a7\u5236\u6570\u636e\u6d41\u3002\u5b83\u662f\u4e00\u79cd\u9ad8\u7ea7\u529f\u80fd\uff0c\u53ef\u4ee5\u5e2e\u52a9\u7528\u6237\u66f4\u597d\u5730\u63a7\u5236\u548c\u7ba1\u7406\u6570\u636e\u6d41\uff0c\u4ece\u800c\u63d0\u9ad8\u6570\u636e\u4f20\u8f93\u7684\u6548\u7387\u548c\u6027\u80fd\u3002<\/p>\n

  DMA\u6d41\u900f\u89c6\u6280\u672f\u53ef\u4ee5\u5e2e\u52a9\u7528\u6237\u66f4\u597d\u5730\u7ba1\u7406\u6570\u636e\u6d41\uff0c\u53ef\u4ee5\u66f4\u597d\u5730\u63a7\u5236\u6570\u636e\u6d41\uff0c\u5e76\u53ef\u4ee5\u66f4\u597d\u5730\u5206\u6790\u6570\u636e\u6d41\uff0c\u4ece\u800c\u63d0\u9ad8\u6570\u636e\u4f20\u8f93\u7684\u6548\u7387\u548c\u6027\u80fd\u3002\u5b83\u662f\u4e00\u79cd\u9ad8\u7ea7\u529f\u80fd\uff0c\u53ef\u4ee5\u5e2e\u52a9\u7528\u6237\u66f4\u597d\u5730\u63a7\u5236\u548c\u7ba1\u7406\u6570\u636e\u6d41\uff0c\u4ece\u800c\u63d0\u9ad8\u6570\u636e\u4f20\u8f93\u7684\u6548\u7387\u548c\u6027\u80fd\u3002<\/p>\n

DMA\u6d41\u900f\u89c6\u7684\u57fa\u672c\u539f\u7406<\/h2>\n

  DMA\u6d41\u900f\u89c6\u7684\u57fa\u672c\u539f\u7406\u662f\u4f7f\u7528DMA\uff08Direct Memory Access\uff09\u6280\u672f\u6765\u63a7\u5236\u6570\u636e\u6d41\u3002DMA\u662f\u4e00\u79cd\u6280\u672f\uff0c\u5b83\u5141\u8bb8\u8bbe\u5907\u76f4\u63a5\u4ece\u5185\u5b58\u4e2d\u8bbf\u95ee\u6570\u636e\uff0c\u800c\u4e0d\u9700\u8981CPU\u7684\u53c2\u4e0e\u3002DMA\u6d41\u900f\u89c6\u53ef\u4ee5\u5e2e\u52a9\u7528\u6237\u66f4\u52a0\u6709\u6548\u5730\u63a7\u5236\u6570\u636e\u6d41\uff0c\u5e76\u53ef\u4ee5\u66f4\u597d\u5730\u5206\u6790\u6570\u636e\u6d41\uff0c\u4ece\u800c\u63d0\u9ad8\u6570\u636e\u4f20\u8f93\u7684\u6548\u7387\u548c\u6027\u80fd\u3002<\/p>\n

DMA\u6d41\u900f\u89c6\u7684\u529f\u80fd\u4e0e\u4f18\u52bf<\/h2>\n

  1.\u53ef\u4ee5\u66f4\u6709\u6548\u5730\u63a7\u5236\u6570\u636e\u6d41<\/h3>\n

  \u4f7f\u7528DMA\u6d41\u900f\u89c6\u53ef\u4ee5\u66f4\u6709\u6548\u5730\u63a7\u5236\u6570\u636e\u6d41\uff0c\u53ef\u4ee5\u66f4\u597d\u5730\u63a7\u5236\u548c\u7ba1\u7406\u6570\u636e\u6d41\uff0c\u4ece\u800c\u63d0\u9ad8\u6570\u636e\u4f20\u8f93\u7684\u6548\u7387\u548c\u6027\u80fd\u3002<\/p>\n

  2.\u53ef\u4ee5\u66f4\u6709\u6548\u5730\u5206\u6790\u6570\u636e\u6d41<\/h3>\n

  \u4f7f\u7528DMA\u6d41\u900f\u89c6\u53ef\u4ee5\u66f4\u6709\u6548\u5730\u5206\u6790\u6570\u636e\u6d41\uff0c\u53ef\u4ee5\u66f4\u597d\u5730\u63a7\u5236\u548c\u7ba1\u7406\u6570\u636e\u6d41\uff0c\u4ece\u800c\u63d0\u9ad8\u6570\u636e\u4f20\u8f93\u7684\u6548\u7387\u548c\u6027\u80fd\u3002<\/p>\n

  3.\u53ef\u4ee5\u66f4\u6709\u6548\u5730\u7ba1\u7406\u6570\u636e\u6d41<\/h3>\n

  \u4f7f\u7528DMA\u6d41\u900f\u89c6\u53ef\u4ee5\u66f4\u6709\u6548\u5730\u7ba1\u7406\u6570\u636e\u6d41\uff0c\u53ef\u4ee5\u66f4\u597d\u5730\u63a7\u5236\u548c\u7ba1\u7406\u6570\u636e\u6d41\uff0c\u4ece\u800c\u63d0\u9ad8\u6570\u636e\u4f20\u8f93\u7684\u6548\u7387\u548c\u6027\u80fd\u3002<\/p>\n

DMA\u6d41\u900f\u89c6\u4e0e\u5176\u4ed6\u6280\u672f\u7684\u6bd4\u8f83<\/h2>\n

  1.\u4e0eDMA\u6280\u672f\u7684\u6bd4\u8f83<\/h3>\n

  DMA\u6d41\u900f\u89c6\u4e0eDMA\u6280\u672f\u6709\u5f88\u591a\u76f8\u4f3c\u4e4b\u5904\uff0c\u4f46\u4e5f\u6709\u4e00\u4e9b\u4e0d\u540c\u4e4b\u5904\u3002\u4e3b\u8981\u7684\u4e0d\u540c\u4e4b\u5904\u662fDMA\u6d41\u900f\u89c6\u53ef\u4ee5\u66f4\u597d\u5730\u63a7\u5236\u548c\u7ba1\u7406\u6570\u636e\u6d41\uff0c\u800cDMA\u6280\u672f\u53ea\u80fd\u63d0\u4f9b\u7b80\u5355\u7684\u6570\u636e\u4f20\u8f93\u3002<\/p>\n

  2.\u4e0e\u5176\u4ed6\u6280\u672f\u7684\u6bd4\u8f83<\/h3>\n

  DMA\u6d41\u900f\u89c6\u4e0e\u5176\u4ed6\u6280\u672f\u4e5f\u6709\u4e00\u4e9b\u4e0d\u540c\u4e4b\u5904\u3002\u4e0e\u5176\u4ed6\u6280\u672f\u76f8\u6bd4\uff0cDMA\u6d41\u900f\u89c6\u53ef\u4ee5\u66f4\u597d\u5730\u63a7\u5236\u548c\u7ba1\u7406\u6570\u636e\u6d41\uff0c\u4ece\u800c\u63d0\u9ad8\u6570\u636e\u4f20\u8f93\u7684\u6548\u7387\u548c\u6027\u80fd\u3002<\/p>\n

\u603b\u7ed3<\/h2>\n

  \u672c\u6587\u4ecb\u7ecd\u4e86DMA\u6d41\u900f\u89c6\u7684\u57fa\u672c\u539f\u7406\u3001\u529f\u80fd\u548c\u4f18\u52bf\uff0c\u4ee5\u53ca\u5b83\u4e0e\u5176\u4ed6\u6280\u672f\u7684\u6bd4\u8f83\u3002<\/strong>DMA\u6d41\u900f\u89c6\u53ef\u4ee5\u5e2e\u52a9\u7528\u6237\u66f4\u6709\u6548\u5730\u63a7\u5236\u548c\u7ba1\u7406\u6570\u636e\u6d41\uff0c\u4ece\u800c\u63d0\u9ad8\u6570\u636e\u4f20\u8f93\u7684\u6548\u7387\u548c\u6027\u80fd\u3002\u5b83\u662f\u4e00\u79cd\u9ad8\u7ea7\u529f\u80fd\uff0c\u53ef\u4ee5\u5e2e\u52a9\u7528\u6237\u66f4\u597d\u5730\u63a7\u5236\u548c\u7ba1\u7406\u6570\u636e\u6d41\uff0c\u4ece\u800c\u63d0\u9ad8\u6570\u636e\u4f20\u8f93\u7684\u6548\u7387\u548c\u6027\u80fd\u3002<\/p>\n","protected":false},"excerpt":{"rendered":"

DMA\u6d41\u900f\u89c6\u662f\u4e00\u79cd\u6280\u672f\uff0c\u53ef\u4ee5\u5e2e\u52a9\u7528\u6237\u66f4\u6709\u6548\u5730\u7ba1\u7406\u3001\u5206\u6790\u548c\u63a7\u5236\u6570\u636e\u6d41\u3002\u5b83\u662f\u4e00\u79cd\u9ad8\u7ea7\u529f\u80fd\uff0c\u53ef\u4ee5\u5e2e\u52a9\u7528\u6237\u66f4\u597d\u5730\u63a7\u5236\u548c\u7ba1\u7406\u6570\u636e\u6d41\uff0c\u4ece\u800c\u63d0\u9ad8\u6570\u636e\u4f20\u8f93\u7684\u6548\u7387\u548c\u6027\u80fd\u3002\u672c\u6587\u5c06\u8be6\u7ec6\u4ecb\u7ecdDM<\/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-41992","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\/41992","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=41992"}],"version-history":[{"count":0,"href":"https:\/\/www.techphant.cn\/wp-json\/wp\/v2\/posts\/41992\/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=41992"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"https:\/\/www.techphant.cn\/wp-json\/wp\/v2\/categories?post=41992"},{"taxonomy":"post_tag","embeddable":true,"href":"https:\/\/www.techphant.cn\/wp-json\/wp\/v2\/tags?post=41992"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}