{"id":44271,"date":"2023-10-04T11:40:46","date_gmt":"2023-10-04T03:40:46","guid":{"rendered":"https:\/\/www.techphant.cn\/?p=44271"},"modified":"2023-10-04T11:40:46","modified_gmt":"2023-10-04T03:40:46","slug":"dzdsyfl","status":"publish","type":"post","link":"https:\/\/www.techphant.cn\/blog\/44271.html","title":{"rendered":"DMA\u4e2d\u65ad\u4f7f\u7528\u8303\u4f8b"},"content":{"rendered":"<p>&emsp;&emsp;DMA\uff08Direct Memory Access\uff09\u4e2d\u65ad\u662f\u4e00\u79cd\u7528\u4e8e\u63a7\u5236\u5916\u8bbe\u548c\u5185\u5b58\u4e4b\u95f4\u7684\u5feb\u901f\u6570\u636e\u4f20\u8f93\u7684\u6280\u672f\u3002\u5b83\u53ef\u4ee5\u51cf\u5c11CPU\u7684\u5de5\u4f5c\u8d1f\u8377\uff0c\u63d0\u9ad8\u7cfb\u7edf\u7684\u5904\u7406\u6548\u7387\uff0c\u662f\u4e00\u79cd\u975e\u5e38\u6709\u7528\u7684\u6280\u672f\u3002\u672c\u6587\u5c06\u4ecb\u7ecdDMA\u4e2d\u65ad\u7684\u4f7f\u7528\u8303\u4f8b\uff0c\u5e2e\u52a9\u8bfb\u8005\u66f4\u597d\u5730\u7406\u89e3\u548c\u4f7f\u7528DMA\u4e2d\u65ad\u3002<\/p>\n<h2 style=\"text-align: center;\">\u4ec0\u4e48\u662fDMA\u4e2d\u65ad\uff1f<\/h2>\n<p>&emsp;&emsp;DMA\u4e2d\u65ad\u662f\u4e00\u79cd\u7528\u4e8e\u63a7\u5236\u5916\u8bbe\u548c\u5185\u5b58\u4e4b\u95f4\u7684\u5feb\u901f\u6570\u636e\u4f20\u8f93\u7684\u6280\u672f\u3002\u5b83\u53ef\u4ee5\u8ba9\u5916\u8bbe\u76f4\u63a5\u5c06\u6570\u636e\u5b58\u50a8\u5230\u5185\u5b58\u4e2d\uff0c\u800c\u4e0d\u9700\u8981\u901a\u8fc7CPU\uff0c\u4ece\u800c\u51cf\u5c11\u4e86CPU\u7684\u5de5\u4f5c\u8d1f\u8377\uff0c\u63d0\u9ad8\u4e86\u7cfb\u7edf\u7684\u5904\u7406\u6548\u7387\u3002<\/p>\n<h2 style=\"text-align: center;\">DMA\u4e2d\u65ad\u7684\u5de5\u4f5c\u539f\u7406<\/h2>\n<p>&emsp;&emsp;DMA\u4e2d\u65ad\u7684\u5de5\u4f5c\u539f\u7406\u5f88\u7b80\u5355\uff0c\u5b83\u7684\u4e3b\u8981\u6b65\u9aa4\u5982\u4e0b\uff1a<\/p>\n<ul>\n<li>\u9996\u5148\uff0c\u5916\u8bbe\u5411DMA\u63a7\u5236\u5668\u53d1\u51fa\u8bf7\u6c42\uff0c\u8981\u6c42\u5b83\u4ece\u5185\u5b58\u4e2d\u8bfb\u53d6\u6216\u5199\u5165\u6570\u636e\u3002<\/li>\n<li>\u7136\u540e\uff0cDMA\u63a7\u5236\u5668\u4f1a\u68c0\u67e5\u5185\u5b58\u662f\u5426\u53ef\u4ee5\u63a5\u53d7\u6570\u636e\u3002<\/li>\n<li>\u5982\u679c\u53ef\u4ee5\uff0cDMA\u63a7\u5236\u5668\u4f1a\u5411\u5916\u8bbe\u53d1\u51fa\u6388\u6743\u4fe1\u53f7\uff0c\u5141\u8bb8\u5b83\u4ece\u5185\u5b58\u4e2d\u8bfb\u53d6\u6216\u5199\u5165\u6570\u636e\u3002<\/li>\n<li>\u6700\u540e\uff0c\u5916\u8bbe\u4f1a\u6839\u636e\u6388\u6743\u4fe1\u53f7\u4ece\u5185\u5b58\u4e2d\u8bfb\u53d6\u6216\u5199\u5165\u6570\u636e\uff0c\u5b8c\u6210\u6570\u636e\u4f20\u8f93\u3002<\/li>\n<\/ul>\n<h2 style=\"text-align: center;\">DMA\u4e2d\u65ad\u7684\u4f7f\u7528\u8303\u4f8b<\/h2>\n<h3>&emsp;&emsp;\u5b9e\u4f8b1\uff1a\u4ece\u5185\u5b58\u4e2d\u8bfb\u53d6\u6570\u636e<\/h3>\n<p>&emsp;&emsp;\u5047\u8bbe\u6211\u4eec\u6709\u4e00\u4e2a\u5916\u8bbe\uff0c\u5b83\u60f3\u8981\u4ece\u5185\u5b58\u4e2d\u8bfb\u53d6\u6570\u636e\u3002\u4e3a\u4e86\u5b9e\u73b0\u8fd9\u4e00\u76ee\u7684\uff0c\u53ef\u4ee5\u4f7f\u7528DMA\u4e2d\u65ad\uff0c\u5176\u64cd\u4f5c\u6b65\u9aa4\u5982\u4e0b\uff1a<\/p>\n<ol>\n<li>\u9996\u5148\uff0c\u5916\u8bbe\u5411DMA\u63a7\u5236\u5668\u53d1\u51fa\u8bf7\u6c42\uff0c\u8981\u6c42\u5b83\u4ece\u5185\u5b58\u4e2d\u8bfb\u53d6\u6570\u636e\u3002<\/li>\n<li>\u7136\u540e\uff0cDMA\u63a7\u5236\u5668\u4f1a\u68c0\u67e5\u5185\u5b58\u662f\u5426\u53ef\u4ee5\u63a5\u53d7\u6570\u636e\u3002<\/li>\n<li>\u5982\u679c\u53ef\u4ee5\uff0cDMA\u63a7\u5236\u5668\u4f1a\u5411\u5916\u8bbe\u53d1\u51fa\u6388\u6743\u4fe1\u53f7\uff0c\u5141\u8bb8\u5b83\u4ece\u5185\u5b58\u4e2d\u8bfb\u53d6\u6570\u636e\u3002<\/li>\n<li>\u6700\u540e\uff0c\u5916\u8bbe\u4f1a\u6839\u636e\u6388\u6743\u4fe1\u53f7\u4ece\u5185\u5b58\u4e2d\u8bfb\u53d6\u6570\u636e\uff0c\u5b8c\u6210\u6570\u636e\u4f20\u8f93\u3002<\/li>\n<\/ol>\n<h3>&emsp;&emsp;\u5b9e\u4f8b2\uff1a\u5411\u5185\u5b58\u4e2d\u5199\u5165\u6570\u636e<\/h3>\n<p>&emsp;&emsp;\u5047\u8bbe\u6211\u4eec\u6709\u4e00\u4e2a\u5916\u8bbe\uff0c\u5b83\u60f3\u8981\u5411\u5185\u5b58\u4e2d\u5199\u5165\u6570\u636e\u3002\u4e3a\u4e86\u5b9e\u73b0\u8fd9\u4e00\u76ee\u7684\uff0c\u53ef\u4ee5\u4f7f\u7528DMA\u4e2d\u65ad\uff0c\u5176\u64cd\u4f5c\u6b65\u9aa4\u5982\u4e0b\uff1a<\/p>\n<ol>\n<li>\u9996\u5148\uff0c\u5916\u8bbe\u5411DMA\u63a7\u5236\u5668\u53d1\u51fa\u8bf7\u6c42\uff0c\u8981\u6c42\u5b83\u5411\u5185\u5b58\u4e2d\u5199\u5165\u6570\u636e\u3002<\/li>\n<li>\u7136\u540e\uff0cDMA\u63a7\u5236\u5668\u4f1a\u68c0\u67e5\u5185\u5b58\u662f\u5426\u53ef\u4ee5\u63a5\u53d7\u6570\u636e\u3002<\/li>\n<li>\u5982\u679c\u53ef\u4ee5\uff0cDMA\u63a7\u5236\u5668\u4f1a\u5411\u5916\u8bbe\u53d1\u51fa\u6388\u6743\u4fe1\u53f7\uff0c\u5141\u8bb8\u5b83\u5411\u5185\u5b58\u4e2d\u5199\u5165\u6570\u636e\u3002<\/li>\n<li>\u6700\u540e\uff0c\u5916\u8bbe\u4f1a\u6839\u636e\u6388\u6743\u4fe1\u53f7\u5411\u5185\u5b58\u4e2d\u5199\u5165\u6570\u636e\uff0c\u5b8c\u6210\u6570\u636e\u4f20\u8f93\u3002<\/li>\n<\/ol>\n<h2 style=\"text-align: center;\">\u603b\u7ed3<\/h2>\n<p>&emsp;&emsp;<strong>\u4ee5\u4e0a\u5c31\u662fDMA\u4e2d\u65ad\u7684\u4f7f\u7528\u8303\u4f8b\uff0c\u5b83\u53ef\u4ee5\u51cf\u5c11CPU\u7684\u5de5\u4f5c\u8d1f\u8377\uff0c\u63d0\u9ad8\u7cfb\u7edf\u7684\u5904\u7406\u6548\u7387\uff0c\u662f\u4e00\u79cd\u975e\u5e38\u6709\u7528\u7684\u6280\u672f\u3002<\/strong>\u5e0c\u671b\u672c\u6587\u80fd\u591f\u5e2e\u52a9\u8bfb\u8005\u66f4\u597d\u5730\u7406\u89e3\u548c\u4f7f\u7528DMA\u4e2d\u65ad\u3002<\/p>\n","protected":false},"excerpt":{"rendered":"<p>DMA\uff08DirectMemoryAccess\uff09\u4e2d\u65ad\u662f\u4e00\u79cd\u7528\u4e8e\u63a7\u5236\u5916\u8bbe\u548c\u5185\u5b58\u4e4b\u95f4\u7684\u5feb\u901f\u6570\u636e\u4f20\u8f93\u7684\u6280\u672f\u3002\u5b83\u53ef\u4ee5\u51cf\u5c11CPU\u7684\u5de5\u4f5c\u8d1f\u8377\uff0c\u63d0\u9ad8\u7cfb\u7edf\u7684\u5904\u7406\u6548\u7387\uff0c\u662f\u4e00\u79cd\u975e\u5e38\u6709\u7528\u7684\u6280<\/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-44271","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\/44271","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=44271"}],"version-history":[{"count":0,"href":"https:\/\/www.techphant.cn\/wp-json\/wp\/v2\/posts\/44271\/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=44271"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"https:\/\/www.techphant.cn\/wp-json\/wp\/v2\/categories?post=44271"},{"taxonomy":"post_tag","embeddable":true,"href":"https:\/\/www.techphant.cn\/wp-json\/wp\/v2\/tags?post=44271"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}