{"id":56410,"date":"2023-10-18T05:14:46","date_gmt":"2023-10-17T21:14:46","guid":{"rendered":"https:\/\/www.techphant.cn\/blog\/56410.html"},"modified":"2023-10-18T05:14:46","modified_gmt":"2023-10-17T21:14:46","slug":"sydjswssjyc","status":"publish","type":"post","link":"https:\/\/www.techphant.cn\/blog\/56410.html","title":{"rendered":"\u4f7f\u7528DMA\u63a5\u6536\u5916\u8bbe\u6570\u636e\u5f02\u5e38"},"content":{"rendered":"

  DMA\uff08Direct Memory Access\uff09\u662f\u4e00\u79cd\u6570\u636e\u4f20\u8f93\u6280\u672f\uff0c\u5b83\u53ef\u4ee5\u8ba9\u5916\u8bbe\u76f4\u63a5\u5c06\u6570\u636e\u5199\u5165\u4e3b\u5b58\uff0c\u65e0\u9700CPU\u7684\u53c2\u4e0e\uff0c\u4ece\u800c\u63d0\u9ad8\u6570\u636e\u4f20\u8f93\u6548\u7387\u3002\u7136\u800c\uff0c\u5728\u4f7f\u7528DMA\u63a5\u6536\u5916\u8bbe\u6570\u636e\u7684\u8fc7\u7a0b\u4e2d\uff0c\u4e5f\u4f1a\u51fa\u73b0\u4e00\u4e9b\u5f02\u5e38\u60c5\u51b5\uff0c\u672c\u6587\u5c06\u8be6\u7ec6\u4ecb\u7ecd\u4f7f\u7528DMA\u63a5\u6536\u5916\u8bbe\u6570\u636e\u5f02\u5e38\u7684\u539f\u56e0\u4ee5\u53ca\u89e3\u51b3\u65b9\u6cd5\u3002<\/p>\n

DMA\u63a5\u6536\u5916\u8bbe\u6570\u636e\u5f02\u5e38\u7684\u539f\u56e0<\/h2>\n

  1.\u5916\u8bbe\u6570\u636e\u6e90\u4e0d\u6b63\u786e<\/h3>\n

  \u5f53\u5916\u8bbe\u6570\u636e\u6e90\u4e0d\u6b63\u786e\u65f6\uff0cDMA\u5c31\u65e0\u6cd5\u6b63\u786e\u63a5\u6536\u5916\u8bbe\u6570\u636e\uff0c\u4ece\u800c\u5bfc\u81f4\u63a5\u6536\u5916\u8bbe\u6570\u636e\u5f02\u5e38\u3002\u56e0\u6b64\uff0c\u5728\u4f7f\u7528DMA\u63a5\u6536\u5916\u8bbe\u6570\u636e\u4e4b\u524d\uff0c\u4e00\u5b9a\u8981\u786e\u4fdd\u5916\u8bbe\u6570\u636e\u6e90\u6b63\u786e\u3002<\/p>\n

  2.DMA\u4f20\u8f93\u6a21\u5f0f\u4e0d\u6b63\u786e<\/h3>\n

  DMA\u4f20\u8f93\u6a21\u5f0f\u662f\u6307DMA\u63a5\u6536\u5916\u8bbe\u6570\u636e\u7684\u65b9\u5f0f\uff0c\u5982\u679cDMA\u4f20\u8f93\u6a21\u5f0f\u4e0d\u6b63\u786e\uff0c\u5c31\u4f1a\u5bfc\u81f4\u63a5\u6536\u5916\u8bbe\u6570\u636e\u5f02\u5e38\u3002\u56e0\u6b64\uff0c\u5728\u4f7f\u7528DMA\u63a5\u6536\u5916\u8bbe\u6570\u636e\u4e4b\u524d\uff0c\u4e00\u5b9a\u8981\u786e\u4fddDMA\u4f20\u8f93\u6a21\u5f0f\u6b63\u786e\u3002<\/p>\n

  3.DMA\u5730\u5740\u8bbe\u7f6e\u4e0d\u6b63\u786e<\/h3>\n

  DMA\u5730\u5740\u8bbe\u7f6e\u662f\u6307DMA\u63a5\u6536\u5916\u8bbe\u6570\u636e\u65f6\uff0cDMA\u5b58\u50a8\u5668\u5730\u5740\u7684\u8bbe\u7f6e\uff0c\u5982\u679cDMA\u5730\u5740\u8bbe\u7f6e\u4e0d\u6b63\u786e\uff0c\u5c31\u4f1a\u5bfc\u81f4\u63a5\u6536\u5916\u8bbe\u6570\u636e\u5f02\u5e38\u3002\u56e0\u6b64\uff0c\u5728\u4f7f\u7528DMA\u63a5\u6536\u5916\u8bbe\u6570\u636e\u4e4b\u524d\uff0c\u4e00\u5b9a\u8981\u786e\u4fddDMA\u5730\u5740\u8bbe\u7f6e\u6b63\u786e\u3002<\/p>\n

\u89e3\u51b3DMA\u63a5\u6536\u5916\u8bbe\u6570\u636e\u5f02\u5e38\u7684\u65b9\u6cd5<\/h2>\n

  1.\u68c0\u67e5\u5916\u8bbe\u6570\u636e\u6e90<\/h3>\n

  \u5982\u679c\u53d1\u73b0\u5916\u8bbe\u6570\u636e\u6e90\u4e0d\u6b63\u786e\uff0c\u53ef\u4ee5\u901a\u8fc7\u8c03\u8bd5\u5de5\u5177\u68c0\u67e5\u5916\u8bbe\u6570\u636e\u6e90\uff0c\u4ee5\u786e\u4fdd\u5916\u8bbe\u6570\u636e\u6e90\u6b63\u786e\u3002<\/p>\n

  2.\u68c0\u67e5DMA\u4f20\u8f93\u6a21\u5f0f<\/h3>\n

  \u5982\u679c\u53d1\u73b0DMA\u4f20\u8f93\u6a21\u5f0f\u4e0d\u6b63\u786e\uff0c\u53ef\u4ee5\u901a\u8fc7\u8c03\u8bd5\u5de5\u5177\u68c0\u67e5DMA\u4f20\u8f93\u6a21\u5f0f\uff0c\u4ee5\u786e\u4fddDMA\u4f20\u8f93\u6a21\u5f0f\u6b63\u786e\u3002<\/p>\n

  3.\u68c0\u67e5DMA\u5730\u5740\u8bbe\u7f6e<\/h3>\n

  \u5982\u679c\u53d1\u73b0DMA\u5730\u5740\u8bbe\u7f6e\u4e0d\u6b63\u786e\uff0c\u53ef\u4ee5\u901a\u8fc7\u8c03\u8bd5\u5de5\u5177\u68c0\u67e5DMA\u5730\u5740\u8bbe\u7f6e\uff0c\u4ee5\u786e\u4fddDMA\u5730\u5740\u8bbe\u7f6e\u6b63\u786e\u3002<\/p>\n

\u603b\u7ed3<\/h2>\n

  \u4f7f\u7528DMA\u63a5\u6536\u5916\u8bbe\u6570\u636e\u5f02\u5e38\u53ef\u80fd\u662f\u7531\u4e8e\u5916\u8bbe\u6570\u636e\u6e90\u4e0d\u6b63\u786e\u3001DMA\u4f20\u8f93\u6a21\u5f0f\u4e0d\u6b63\u786e\u6216DMA\u5730\u5740\u8bbe\u7f6e\u4e0d\u6b63\u786e\u5f15\u8d77\u7684\u3002<\/strong>\u5982\u679c\u53d1\u73b0\u4f7f\u7528DMA\u63a5\u6536\u5916\u8bbe\u6570\u636e\u5f02\u5e38\uff0c\u53ef\u4ee5\u901a\u8fc7\u8c03\u8bd5\u5de5\u5177\u68c0\u67e5\u5916\u8bbe\u6570\u636e\u6e90\u3001DMA\u4f20\u8f93\u6a21\u5f0f\u548cDMA\u5730\u5740\u8bbe\u7f6e\uff0c\u4ee5\u786e\u4fddDMA\u63a5\u6536\u5916\u8bbe\u6570\u636e\u6b63\u5e38\u3002<\/p>\n","protected":false},"excerpt":{"rendered":"

DMA\uff08DirectMemoryAccess\uff09\u662f\u4e00\u79cd\u6570\u636e\u4f20\u8f93\u6280\u672f\uff0c\u5b83\u53ef\u4ee5\u8ba9\u5916\u8bbe\u76f4\u63a5\u5c06\u6570\u636e\u5199\u5165\u4e3b\u5b58\uff0c\u65e0\u9700CPU\u7684\u53c2\u4e0e\uff0c\u4ece\u800c\u63d0\u9ad8\u6570\u636e\u4f20\u8f93\u6548\u7387\u3002\u7136\u800c\uff0c\u5728\u4f7f\u7528DMA\u63a5\u6536\u5916\u8bbe\u6570<\/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-56410","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\/56410"}],"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=56410"}],"version-history":[{"count":0,"href":"https:\/\/www.techphant.cn\/wp-json\/wp\/v2\/posts\/56410\/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=56410"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"https:\/\/www.techphant.cn\/wp-json\/wp\/v2\/categories?post=56410"},{"taxonomy":"post_tag","embeddable":true,"href":"https:\/\/www.techphant.cn\/wp-json\/wp\/v2\/tags?post=56410"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}