{"id":28305,"date":"2023-09-18T21:41:43","date_gmt":"2023-09-18T13:41:43","guid":{"rendered":"https:\/\/www.techphant.cn\/?p=28305"},"modified":"2023-09-18T21:41:43","modified_gmt":"2023-09-18T13:41:43","slug":"wsmdzncsyc","status":"publish","type":"post","link":"https:\/\/www.techphant.cn\/blog\/28305.html","title":{"rendered":"\u4e3a\u4ec0\u4e48DMA\u53ea\u80fd\u4f20\u8f93\u4e00\u6b21?"},"content":{"rendered":"

  DMA\uff08\u76f4\u63a5\u5185\u5b58\u8bbf\u95ee\uff09\u662f\u4e00\u79cd\u7528\u6765\u5728CPU\u548c\u5185\u5b58\u4e4b\u95f4\u4f20\u8f93\u6570\u636e\u7684\u6280\u672f\u3002\u5b83\u53ef\u4ee5\u63d0\u9ad8\u4f20\u8f93\u901f\u5ea6\uff0c\u51cf\u5c11CPU\u7684\u5de5\u4f5c\u91cf\uff0c\u5e76\u4e14\u53ef\u4ee5\u5728\u4e0d\u9700\u8981CPU\u7684\u60c5\u51b5\u4e0b\u5b8c\u6210\u6570\u636e\u4f20\u8f93\u3002\u4f46\u662f\uff0c\u7531\u4e8eDMA\u7684\u7279\u6027\uff0c\u5b83\u53ea\u80fd\u4f20\u8f93\u4e00\u6b21\u3002\u672c\u6587\u5c06\u4ecb\u7ecd\u4e3a\u4ec0\u4e48DMA\u53ea\u80fd\u4f20\u8f93\u4e00\u6b21\u3002<\/p>\n

DMA\u7684\u7279\u6027<\/h2>\n

  DMA\u662f\u4e00\u79cd\u4e13\u7528\u786c\u4ef6\uff0c\u5b83\u53ef\u4ee5\u5728CPU\u548c\u5185\u5b58\u4e4b\u95f4\u4f20\u8f93\u6570\u636e\uff0c\u800c\u4e0d\u9700\u8981CPU\u7684\u53c2\u4e0e\u3002\u5b83\u53ef\u4ee5\u63d0\u9ad8\u4f20\u8f93\u901f\u5ea6\uff0c\u51cf\u5c11CPU\u7684\u5de5\u4f5c\u91cf\uff0c\u4f7f\u5f97CPU\u53ef\u4ee5\u5b8c\u6210\u66f4\u591a\u7684\u5de5\u4f5c\u3002\u4f46\u662f\uff0c\u7531\u4e8eDMA\u7684\u7279\u6027\uff0c\u5b83\u53ea\u80fd\u4f20\u8f93\u4e00\u6b21\u3002<\/p>\n

DMA\u53ea\u80fd\u4f20\u8f93\u4e00\u6b21\u7684\u539f\u56e0<\/h3>\n

  \u9996\u5148\uff0cDMA\u53ea\u80fd\u4f20\u8f93\u4e00\u6b21\u7684\u539f\u56e0\u662f\u56e0\u4e3a\u5b83\u662f\u4e00\u79cd\u4e13\u7528\u786c\u4ef6\uff0c\u5b83\u4e0d\u80fd\u53cd\u590d\u4f7f\u7528\u3002\u6bcf\u6b21\u4f20\u8f93\u5b8c\u6210\u540e\uff0c\u5b83\u90fd\u4f1a\u81ea\u52a8\u505c\u6b62\u5de5\u4f5c\uff0c\u800c\u4e0d\u80fd\u7ee7\u7eed\u4f20\u8f93\u3002<\/p>\n

  \u5176\u6b21\uff0cDMA\u53ea\u80fd\u4f20\u8f93\u4e00\u6b21\u7684\u539f\u56e0\u662f\u56e0\u4e3a\u5b83\u53ea\u80fd\u5b8c\u6210\u4e00\u6b21\u6027\u7684\u6570\u636e\u4f20\u8f93\u3002\u5b83\u4e0d\u80fd\u53cd\u590d\u4f20\u8f93\uff0c\u4e5f\u4e0d\u80fd\u66f4\u6539\u4f20\u8f93\u7684\u65b9\u5411\u3002\u56e0\u6b64\uff0c\u5b83\u53ea\u80fd\u4f20\u8f93\u4e00\u6b21\u3002<\/p>\n

DMA\u7684\u4f18\u70b9<\/h3>\n

  \u867d\u7136DMA\u53ea\u80fd\u4f20\u8f93\u4e00\u6b21\uff0c\u4f46\u5b83\u4ecd\u7136\u5177\u6709\u5f88\u591a\u4f18\u70b9\u3002\u9996\u5148\uff0c\u5b83\u53ef\u4ee5\u63d0\u9ad8\u4f20\u8f93\u901f\u5ea6\uff0c\u51cf\u5c11CPU\u7684\u5de5\u4f5c\u91cf\uff0c\u4f7fCPU\u53ef\u4ee5\u5b8c\u6210\u66f4\u591a\u7684\u5de5\u4f5c\u3002\u5176\u6b21\uff0c\u5b83\u53ef\u4ee5\u5728\u4e0d\u9700\u8981CPU\u7684\u60c5\u51b5\u4e0b\u5b8c\u6210\u6570\u636e\u4f20\u8f93\uff0c\u8fd9\u6837\u53ef\u4ee5\u66f4\u6709\u6548\u5730\u5229\u7528CPU\u7684\u8d44\u6e90\u3002<\/p>\n

\u603b\u7ed3<\/h2>\n

  \u672c\u6587\u4ecb\u7ecd\u4e86DMA\u53ea\u80fd\u4f20\u8f93\u4e00\u6b21\u7684\u539f\u56e0\uff0c\u4ee5\u53caDMA\u7684\u4f18\u70b9\u3002<\/strong>\u603b\u7684\u6765\u8bf4\uff0cDMA\u53ef\u4ee5\u63d0\u9ad8\u4f20\u8f93\u901f\u5ea6\uff0c\u51cf\u5c11CPU\u7684\u5de5\u4f5c\u91cf\uff0c\u4f46\u5b83\u53ea\u80fd\u4f20\u8f93\u4e00\u6b21\u3002<\/p>\n","protected":false},"excerpt":{"rendered":"

DMA\uff08\u76f4\u63a5\u5185\u5b58\u8bbf\u95ee\uff09\u662f\u4e00\u79cd\u7528\u6765\u5728CPU\u548c\u5185\u5b58\u4e4b\u95f4\u4f20\u8f93\u6570\u636e\u7684\u6280\u672f\u3002\u5b83\u53ef\u4ee5\u63d0\u9ad8\u4f20\u8f93\u901f\u5ea6\uff0c\u51cf\u5c11CPU\u7684\u5de5\u4f5c\u91cf\uff0c\u5e76\u4e14\u53ef\u4ee5\u5728\u4e0d\u9700\u8981CPU\u7684\u60c5\u51b5\u4e0b\u5b8c\u6210\u6570\u636e\u4f20\u8f93\u3002\u4f46\u662f\uff0c\u7531\u4e8eDMA\u7684\u7279<\/p>\n","protected":false},"author":1,"featured_media":3671,"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":[52],"class_list":["post-28305","post","type-post","status-publish","format-standard","has-post-thumbnail","hentry","category-blog","tag-wxtx"],"_links":{"self":[{"href":"https:\/\/www.techphant.cn\/wp-json\/wp\/v2\/posts\/28305","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=28305"}],"version-history":[{"count":0,"href":"https:\/\/www.techphant.cn\/wp-json\/wp\/v2\/posts\/28305\/revisions"}],"wp:featuredmedia":[{"embeddable":true,"href":"https:\/\/www.techphant.cn\/wp-json\/wp\/v2\/media\/3671"}],"wp:attachment":[{"href":"https:\/\/www.techphant.cn\/wp-json\/wp\/v2\/media?parent=28305"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"https:\/\/www.techphant.cn\/wp-json\/wp\/v2\/categories?post=28305"},{"taxonomy":"post_tag","embeddable":true,"href":"https:\/\/www.techphant.cn\/wp-json\/wp\/v2\/tags?post=28305"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}