{"id":60300,"date":"2023-11-01T03:45:31","date_gmt":"2023-10-31T19:45:31","guid":{"rendered":"https:\/\/www.techphant.cn\/?p=60300"},"modified":"2023-11-01T03:45:31","modified_gmt":"2023-10-31T19:45:31","slug":"dcswcdckfcq","status":"publish","type":"post","link":"https:\/\/www.techphant.cn\/blog\/60300.html","title":{"rendered":"DMA\u4f20\u8f93\u5b8c\u6210\u5230\u4e32\u53e3\u53d1\u51fa\u53bb"},"content":{"rendered":"<p>&emsp;&emsp;DMA(Direct Memory Access)\u662f\u4e00\u79cd\u5141\u8bb8\u5916\u56f4\u8bbe\u5907\u76f4\u63a5\u8bbf\u95ee\u5185\u5b58\uff0c\u800c\u4e0d\u9700\u8981CPU\u4ecb\u5165\u7684\u4e00\u79cd\u6280\u672f\u3002DMA\u4f20\u8f93\u53ef\u4ee5\u5927\u5927\u63d0\u9ad8\u7cfb\u7edf\u7684\u4f20\u8f93\u6548\u7387\uff0c\u5e76\u4e14\u53ef\u4ee5\u51cf\u5c11CPU\u7684\u8d1f\u62c5\uff0c\u4ece\u800c\u5b9e\u73b0\u66f4\u9ad8\u7684\u6027\u80fd\u3002\u672c\u6587\u5c06\u8ba8\u8bba\u5982\u4f55\u4f7f\u7528DMA\u5b8c\u6210\u5230\u4e32\u53e3\u53d1\u51fa\u53bb\uff0c\u4ee5\u53ca\u5982\u4f55\u4f18\u5316DMA\u4f20\u8f93\u6027\u80fd\u3002<\/p>\n<h2 style=\"text-align: center;\">DMA\u4f20\u8f93\u5230\u4e32\u53e3\u7684\u539f\u7406<\/h2>\n<p>&emsp;&emsp;DMA\u4f20\u8f93\u5230\u4e32\u53e3\u7684\u539f\u7406\u662f\uff0c\u901a\u8fc7DMA\u63a7\u5236\u5668\u5c06\u6570\u636e\u4ece\u5185\u5b58\u76f4\u63a5\u4f20\u8f93\u5230\u4e32\u53e3\uff0c\u800c\u4e0d\u9700\u8981CPU\u53c2\u4e0e\u3002DMA\u63a7\u5236\u5668\u63a7\u5236\u7740\u5185\u5b58\u548c\u4e32\u53e3\u4e4b\u95f4\u7684\u4f20\u8f93\uff0c\u53ef\u4ee5\u5c06\u6570\u636e\u4ece\u5185\u5b58\u4f20\u8f93\u5230\u4e32\u53e3\uff0c\u4e5f\u53ef\u4ee5\u5c06\u6570\u636e\u4ece\u4e32\u53e3\u4f20\u8f93\u5230\u5185\u5b58\u3002<\/p>\n<h3>&emsp;&emsp;\u4f7f\u7528DMA\u4f20\u8f93\u5230\u4e32\u53e3\u7684\u6b65\u9aa4<\/h3>\n<p>&emsp;&emsp;\u4f7f\u7528DMA\u4f20\u8f93\u5230\u4e32\u53e3\u7684\u6b65\u9aa4\u5982\u4e0b\uff1a<\/p>\n<ul>\n<li>\u6b65\u9aa41\uff1a\u914d\u7f6eDMA\u63a7\u5236\u5668\uff0c\u8bbe\u7f6eDMA\u4f20\u8f93\u53c2\u6570\uff1b<\/li>\n<li>\u6b65\u9aa42\uff1a\u5c06\u6570\u636e\u4ece\u5185\u5b58\u590d\u5236\u5230DMA\u7f13\u51b2\u533a\uff1b<\/li>\n<li>\u6b65\u9aa43\uff1a\u542f\u52a8DMA\u4f20\u8f93\uff0c\u5c06\u6570\u636e\u4eceDMA\u7f13\u51b2\u533a\u4f20\u8f93\u5230\u4e32\u53e3\uff1b<\/li>\n<li>\u6b65\u9aa44\uff1a\u5b8c\u6210\u6570\u636e\u4f20\u8f93\uff0c\u5173\u95edDMA\u63a7\u5236\u5668\u3002<\/li>\n<\/ul>\n<h3>&emsp;&emsp;\u4f18\u5316DMA\u4f20\u8f93\u6027\u80fd<\/h3>\n<p>&emsp;&emsp;\u4e3a\u4e86\u63d0\u9ad8DMA\u4f20\u8f93\u6027\u80fd\uff0c\u9700\u8981\u6b63\u786e\u914d\u7f6eDMA\u63a7\u5236\u5668\uff0c\u5e76\u4e14\u9700\u8981\u4f18\u5316DMA\u4f20\u8f93\u53c2\u6570\u3002\u5177\u4f53\u7684\u4f18\u5316\u6b65\u9aa4\u5982\u4e0b\uff1a<\/p>\n<ul>\n<li>\u6b65\u9aa41\uff1a\u4f18\u5316DMA\u4f20\u8f93\u7684\u5757\u5927\u5c0f\uff1b<\/li>\n<li>\u6b65\u9aa42\uff1a\u4f18\u5316DMA\u4f20\u8f93\u7684\u5ef6\u8fdf\u65f6\u95f4\uff1b<\/li>\n<li>\u6b65\u9aa43\uff1a\u4f18\u5316DMA\u4f20\u8f93\u7684\u4f20\u8f93\u901f\u7387\uff1b<\/li>\n<li>\u6b65\u9aa44\uff1a\u4f18\u5316DMA\u4f20\u8f93\u7684\u4f20\u8f93\u65b9\u5411\uff1b<\/li>\n<li>\u6b65\u9aa45\uff1a\u4f18\u5316DMA\u4f20\u8f93\u7684\u4f20\u8f93\u6a21\u5f0f\u3002<\/li>\n<\/ul>\n<h2 style=\"text-align: center;\">\u7ed3\u8bba<\/h2>\n<p>&emsp;&emsp;<strong>\u672c\u6587\u4ecb\u7ecd\u4e86\u5982\u4f55\u4f7f\u7528DMA\u5b8c\u6210\u5230\u4e32\u53e3\u53d1\u51fa\u53bb\uff0c\u4ee5\u53ca\u5982\u4f55\u4f18\u5316DMA\u4f20\u8f93\u6027\u80fd\u3002<\/strong>DMA\u4f20\u8f93\u53ef\u4ee5\u5927\u5927\u63d0\u9ad8\u7cfb\u7edf\u7684\u4f20\u8f93\u6548\u7387\uff0c\u5e76\u4e14\u53ef\u4ee5\u51cf\u5c11CPU\u7684\u8d1f\u62c5\uff0c\u4ece\u800c\u5b9e\u73b0\u66f4\u9ad8\u7684\u6027\u80fd\u3002\u4f7f\u7528DMA\u4f20\u8f93\u5230\u4e32\u53e3\u9700\u8981\u6b63\u786e\u914d\u7f6eDMA\u63a7\u5236\u5668\uff0c\u5e76\u4e14\u8fd8\u9700\u8981\u4f18\u5316DMA\u4f20\u8f93\u53c2\u6570\uff0c\u4ee5\u63d0\u9ad8\u4f20\u8f93\u6027\u80fd\u3002<\/p>\n","protected":false},"excerpt":{"rendered":"<p>DMA(DirectMemoryAccess)\u662f\u4e00\u79cd\u5141\u8bb8\u5916\u56f4\u8bbe\u5907\u76f4\u63a5\u8bbf\u95ee\u5185\u5b58\uff0c\u800c\u4e0d\u9700\u8981CPU\u4ecb\u5165\u7684\u4e00\u79cd\u6280\u672f\u3002DMA\u4f20\u8f93\u53ef\u4ee5\u5927\u5927\u63d0\u9ad8\u7cfb\u7edf\u7684\u4f20\u8f93\u6548\u7387\uff0c\u5e76\u4e14\u53ef\u4ee5\u51cf\u5c11CPU\u7684<\/p>\n","protected":false},"author":1,"featured_media":1839,"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":[69],"class_list":["post-60300","post","type-post","status-publish","format-standard","has-post-thumbnail","hentry","category-blog","tag-cktx"],"_links":{"self":[{"href":"https:\/\/www.techphant.cn\/wp-json\/wp\/v2\/posts\/60300","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=60300"}],"version-history":[{"count":0,"href":"https:\/\/www.techphant.cn\/wp-json\/wp\/v2\/posts\/60300\/revisions"}],"wp:featuredmedia":[{"embeddable":true,"href":"https:\/\/www.techphant.cn\/wp-json\/wp\/v2\/media\/1839"}],"wp:attachment":[{"href":"https:\/\/www.techphant.cn\/wp-json\/wp\/v2\/media?parent=60300"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"https:\/\/www.techphant.cn\/wp-json\/wp\/v2\/categories?post=60300"},{"taxonomy":"post_tag","embeddable":true,"href":"https:\/\/www.techphant.cn\/wp-json\/wp\/v2\/tags?post=60300"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}