{"id":44955,"date":"2023-09-27T13:40:20","date_gmt":"2023-09-27T05:40:20","guid":{"rendered":"https:\/\/www.techphant.cn\/?p=44955"},"modified":"2023-09-27T13:40:20","modified_gmt":"2023-09-27T05:40:20","slug":"dcktxpz","status":"publish","type":"post","link":"https:\/\/www.techphant.cn\/blog\/44955.html","title":{"rendered":"DMA\u4e32\u53e3\u901a\u4fe1\u914d\u7f6e"},"content":{"rendered":"<p>&emsp;&emsp;DMA\uff08Direct Memory Access\uff09\u4e32\u53e3\u901a\u4fe1\u914d\u7f6e\u662f\u4e00\u79cd\u66f4\u9ad8\u7ea7\u7684\u4e32\u53e3\u901a\u4fe1\u6280\u672f\uff0c\u5b83\u53ef\u4ee5\u63d0\u9ad8\u4e32\u53e3\u901a\u4fe1\u7684\u6548\u7387\uff0c\u5e76\u6709\u6548\u51cf\u5c11\u7cfb\u7edf\u8d44\u6e90\u7684\u6d88\u8017\u3002\u672c\u6587\u5c06\u8be6\u7ec6\u4ecb\u7ecdDMA\u4e32\u53e3\u901a\u4fe1\u914d\u7f6e\u7684\u5de5\u4f5c\u539f\u7406\uff0c\u4ee5\u53ca\u5b83\u7684\u4f18\u52bf\u548c\u5e94\u7528\u573a\u666f\u3002<\/p>\n<h2 style=\"text-align: center;\">DMA\u4e32\u53e3\u901a\u4fe1\u914d\u7f6e\u7684\u5de5\u4f5c\u539f\u7406<\/h2>\n<p>&emsp;&emsp;DMA\u4e32\u53e3\u901a\u4fe1\u914d\u7f6e\u662f\u4e00\u79cd\u9ad8\u7ea7\u7684\u4e32\u53e3\u901a\u4fe1\u6280\u672f\uff0c\u5b83\u53ef\u4ee5\u63d0\u9ad8\u4e32\u53e3\u901a\u4fe1\u7684\u6548\u7387\uff0c\u5e76\u6709\u6548\u51cf\u5c11\u7cfb\u7edf\u8d44\u6e90\u7684\u6d88\u8017\u3002\u5b83\u7684\u5de5\u4f5c\u539f\u7406\u662f\uff0c\u5f53\u4e32\u53e3\u53d1\u9001\u6216\u63a5\u6536\u6570\u636e\u65f6\uff0cDMA\u63a7\u5236\u5668\u4f1a\u4e3b\u52a8\u4ece\u4e32\u53e3\u7f13\u51b2\u533a\u8bfb\u53d6\u6570\u636e\uff0c\u7136\u540e\u5c06\u6570\u636e\u62f7\u8d1d\u5230\u5185\u5b58\u4e2d\uff0c\u5b8c\u6210\u6570\u636e\u4f20\u8f93\u3002<\/p>\n<p>&emsp;&emsp;\u8fd9\u79cd\u6280\u672f\u7684\u4f18\u52bf\u5728\u4e8e\uff0c\u5b83\u53ef\u4ee5\u6709\u6548\u51cf\u5c11CPU\u7684\u8d1f\u8377\uff0c\u56e0\u4e3a\u4e32\u53e3\u901a\u4fe1\u7684\u6570\u636e\u4f20\u8f93\u7531DMA\u63a7\u5236\u5668\u5b8c\u6210\uff0c\u800c\u4e0d\u662f\u7531CPU\u5b8c\u6210\uff0c\u8fd9\u6837\u53ef\u4ee5\u8282\u7701CPU\u7684\u8d44\u6e90\uff0c\u8ba9CPU\u66f4\u591a\u7684\u65f6\u95f4\u53bb\u5904\u7406\u5176\u4ed6\u4efb\u52a1\u3002<\/p>\n<h2 style=\"text-align: center;\">DMA\u4e32\u53e3\u901a\u4fe1\u914d\u7f6e\u7684\u4f18\u52bf<\/h2>\n<p>&emsp;&emsp;DMA\u4e32\u53e3\u901a\u4fe1\u914d\u7f6e\u7684\u4f18\u52bf\u5728\u4e8e\uff0c\u5b83\u53ef\u4ee5\u6709\u6548\u63d0\u9ad8\u4e32\u53e3\u901a\u4fe1\u7684\u6548\u7387\uff0c\u5e76\u6709\u6548\u51cf\u5c11\u7cfb\u7edf\u8d44\u6e90\u7684\u6d88\u8017\u3002\u9996\u5148\uff0c\u5b83\u53ef\u4ee5\u51cf\u5c11CPU\u7684\u8d1f\u8377\uff0c\u56e0\u4e3a\u4e32\u53e3\u901a\u4fe1\u7684\u6570\u636e\u4f20\u8f93\u7531DMA\u63a7\u5236\u5668\u5b8c\u6210\uff0c\u800c\u4e0d\u662f\u7531CPU\u5b8c\u6210\uff0c\u8fd9\u6837\u53ef\u4ee5\u8282\u7701CPU\u7684\u8d44\u6e90\uff0c\u8ba9CPU\u66f4\u591a\u7684\u65f6\u95f4\u53bb\u5904\u7406\u5176\u4ed6\u4efb\u52a1\u3002\u5176\u6b21\uff0c\u5b83\u8fd8\u53ef\u4ee5\u63d0\u9ad8\u4e32\u53e3\u901a\u4fe1\u7684\u6548\u7387\uff0c\u56e0\u4e3aDMA\u63a7\u5236\u5668\u53ef\u4ee5\u4ee5\u66f4\u5feb\u7684\u901f\u5ea6\u4ece\u4e32\u53e3\u7f13\u51b2\u533a\u8bfb\u53d6\u6570\u636e\uff0c\u5e76\u5c06\u6570\u636e\u62f7\u8d1d\u5230\u5185\u5b58\u4e2d\uff0c\u4ece\u800c\u63d0\u9ad8\u6570\u636e\u4f20\u8f93\u7684\u6548\u7387\u3002<\/p>\n<h2 style=\"text-align: center;\">DMA\u4e32\u53e3\u901a\u4fe1\u914d\u7f6e\u7684\u5e94\u7528\u573a\u666f<\/h2>\n<p>&emsp;&emsp;DMA\u4e32\u53e3\u901a\u4fe1\u914d\u7f6e\u7684\u5e94\u7528\u573a\u666f\u4e3b\u8981\u6709\u4ee5\u4e0b\u51e0\u79cd\uff1a<\/p>\n<h3>&emsp;&emsp;1.\u5b9e\u65f6\u6570\u636e\u91c7\u96c6<\/h3>\n<p>&emsp;&emsp;DMA\u4e32\u53e3\u901a\u4fe1\u914d\u7f6e\u53ef\u4ee5\u7528\u4e8e\u5b9e\u65f6\u6570\u636e\u91c7\u96c6\uff0c\u56e0\u4e3a\u5b83\u53ef\u4ee5\u4ee5\u66f4\u5feb\u7684\u901f\u5ea6\u4ece\u4e32\u53e3\u7f13\u51b2\u533a\u8bfb\u53d6\u6570\u636e\uff0c\u5e76\u5c06\u6570\u636e\u62f7\u8d1d\u5230\u5185\u5b58\u4e2d\uff0c\u4ece\u800c\u63d0\u9ad8\u6570\u636e\u91c7\u96c6\u7684\u6548\u7387\u3002<\/p>\n<h3>&emsp;&emsp;2.\u8bbe\u5907\u63a7\u5236<\/h3>\n<p>&emsp;&emsp;DMA\u4e32\u53e3\u901a\u4fe1\u914d\u7f6e\u4e5f\u53ef\u4ee5\u7528\u4e8e\u8bbe\u5907\u63a7\u5236\uff0c\u56e0\u4e3a\u5b83\u53ef\u4ee5\u6709\u6548\u51cf\u5c11CPU\u7684\u8d1f\u8377\uff0c\u8ba9CPU\u66f4\u591a\u7684\u65f6\u95f4\u53bb\u5904\u7406\u5176\u4ed6\u4efb\u52a1\uff0c\u4ece\u800c\u63d0\u9ad8\u8bbe\u5907\u63a7\u5236\u7684\u6548\u7387\u3002<\/p>\n<h3>&emsp;&emsp;3.\u6570\u636e\u4f20\u8f93<\/h3>\n<p>&emsp;&emsp;DMA\u4e32\u53e3\u901a\u4fe1\u914d\u7f6e\u8fd8\u53ef\u4ee5\u7528\u4e8e\u6570\u636e\u4f20\u8f93\uff0c\u56e0\u4e3a\u5b83\u53ef\u4ee5\u4ee5\u66f4\u5feb\u7684\u901f\u5ea6\u4ece\u4e32\u53e3\u7f13\u51b2\u533a\u8bfb\u53d6\u6570\u636e\uff0c\u5e76\u5c06\u6570\u636e\u62f7\u8d1d\u5230\u5185\u5b58\u4e2d\uff0c\u4ece\u800c\u63d0\u9ad8\u6570\u636e\u4f20\u8f93\u7684\u6548\u7387\u3002<\/p>\n<h2 style=\"text-align: center;\">\u603b\u7ed3<\/h2>\n<p>&emsp;&emsp;<strong>\u672c\u6587\u4ecb\u7ecd\u4e86DMA\u4e32\u53e3\u901a\u4fe1\u914d\u7f6e\u7684\u5de5\u4f5c\u539f\u7406\u3001\u4f18\u52bf\u548c\u5e94\u7528\u573a\u666f\u3002<\/strong>DMA\u4e32\u53e3\u901a\u4fe1\u914d\u7f6e\u53ef\u4ee5\u6709\u6548\u63d0\u9ad8\u4e32\u53e3\u901a\u4fe1\u7684\u6548\u7387\uff0c\u5e76\u6709\u6548\u51cf\u5c11\u7cfb\u7edf\u8d44\u6e90\u7684\u6d88\u8017\uff0c\u5b83\u7684\u5e94\u7528\u573a\u666f\u5305\u62ec\u5b9e\u65f6\u6570\u636e\u91c7\u96c6\u3001\u8bbe\u5907\u63a7\u5236\u548c\u6570\u636e\u4f20\u8f93\u3002<\/p>\n","protected":false},"excerpt":{"rendered":"<p>DMA\uff08DirectMemoryAccess\uff09\u4e32\u53e3\u901a\u4fe1\u914d\u7f6e\u662f\u4e00\u79cd\u66f4\u9ad8\u7ea7\u7684\u4e32\u53e3\u901a\u4fe1\u6280\u672f\uff0c\u5b83\u53ef\u4ee5\u63d0\u9ad8\u4e32\u53e3\u901a\u4fe1\u7684\u6548\u7387\uff0c\u5e76\u6709\u6548\u51cf\u5c11\u7cfb\u7edf\u8d44\u6e90\u7684\u6d88\u8017\u3002\u672c\u6587\u5c06\u8be6\u7ec6\u4ecb\u7ecdDMA\u4e32\u53e3\u901a\u4fe1<\/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":[69],"class_list":["post-44955","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\/44955","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=44955"}],"version-history":[{"count":0,"href":"https:\/\/www.techphant.cn\/wp-json\/wp\/v2\/posts\/44955\/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=44955"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"https:\/\/www.techphant.cn\/wp-json\/wp\/v2\/categories?post=44955"},{"taxonomy":"post_tag","embeddable":true,"href":"https:\/\/www.techphant.cn\/wp-json\/wp\/v2\/tags?post=44955"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}