{"id":45991,"date":"2023-09-27T05:31:01","date_gmt":"2023-09-26T21:31:01","guid":{"rendered":"https:\/\/www.techphant.cn\/?p=45991"},"modified":"2023-09-27T05:31:45","modified_gmt":"2023-09-26T21:31:45","slug":"dtxckpz","status":"publish","type":"post","link":"https:\/\/www.techphant.cn\/blog\/45991.html","title":{"rendered":"DMA\u901a\u4fe1\u4e32\u53e3\u914d\u7f6e"},"content":{"rendered":"<p>&emsp;&emsp;DMA\uff08Direct Memory Access\uff09\u662f\u4e00\u79cd\u5141\u8bb8\u5916\u90e8\u8bbe\u5907\u76f4\u63a5\u8bbf\u95ee\u5185\u5b58\u7684\u6280\u672f\uff0c\u5b83\u53ef\u4ee5\u8ba9\u5916\u90e8\u8bbe\u5907\u66f4\u5feb\u5730\u8bbf\u95ee\u5185\u5b58\uff0c\u63d0\u9ad8\u6570\u636e\u4f20\u8f93\u6548\u7387\u3002DMA\u901a\u4fe1\u4e32\u53e3\u914d\u7f6e\u6280\u672f\u662f\u4e00\u79cd\u53ef\u4ee5\u8ba9DMA\u8bbf\u95ee\u5185\u5b58\u7684\u6280\u672f\uff0c\u5b83\u53ef\u4ee5\u8ba9\u4e32\u53e3\u8fde\u63a5\u7684\u8bbe\u5907\u76f4\u63a5\u8bbf\u95ee\u5185\u5b58\uff0c\u4ece\u800c\u5927\u5927\u63d0\u9ad8\u6570\u636e\u4f20\u8f93\u6548\u7387\u3002\u672c\u6587\u5c06\u4ecb\u7ecdDMA\u901a\u4fe1\u4e32\u53e3\u914d\u7f6e\u7684\u57fa\u672c\u539f\u7406\uff0c\u4ee5\u53ca\u5982\u4f55\u6709\u6548\u5730\u4f7f\u7528\u5b83\u6765\u63d0\u9ad8\u6570\u636e\u4f20\u8f93\u6548\u7387\u3002<\/p>\n<h2 style=\"text-align: center;\">DMA\u901a\u4fe1\u4e32\u53e3\u914d\u7f6e\u7684\u57fa\u672c\u539f\u7406<\/h2>\n<p>&emsp;&emsp;DMA\u901a\u4fe1\u4e32\u53e3\u914d\u7f6e\u4f7f\u7528DMA\u6280\u672f\u6765\u8ba9\u5916\u90e8\u8bbe\u5907\u76f4\u63a5\u8bbf\u95ee\u5185\u5b58\uff0c\u4ece\u800c\u5927\u5927\u63d0\u9ad8\u6570\u636e\u4f20\u8f93\u6548\u7387\u3002\u5728DMA\u901a\u4fe1\u4e32\u53e3\u914d\u7f6e\u4e2d\uff0c\u5916\u90e8\u8bbe\u5907\u901a\u8fc7\u4e32\u53e3\u8fde\u63a5\u5230\u8ba1\u7b97\u673a\uff0c\u7136\u540e\u901a\u8fc7DMA\u6280\u672f\u5c06\u6570\u636e\u4ece\u5916\u90e8\u8bbe\u5907\u4f20\u8f93\u5230\u5185\u5b58\u4e2d\uff0c\u4ece\u800c\u63d0\u9ad8\u6570\u636e\u4f20\u8f93\u6548\u7387\u3002<\/p>\n<h3>&emsp;&emsp;DMA\u901a\u4fe1\u4e32\u53e3\u914d\u7f6e\u7684\u4f18\u52bf<\/h3>\n<p>&emsp;&emsp;DMA\u901a\u4fe1\u4e32\u53e3\u914d\u7f6e\u7684\u4f18\u52bf\u5728\u4e8e\u53ef\u4ee5\u63d0\u9ad8\u6570\u636e\u4f20\u8f93\u6548\u7387\u3002\u7531\u4e8eDMA\u6280\u672f\u53ef\u4ee5\u8ba9\u5916\u90e8\u8bbe\u5907\u76f4\u63a5\u8bbf\u95ee\u5185\u5b58\uff0c\u56e0\u6b64\u53ef\u4ee5\u5927\u5927\u63d0\u9ad8\u6570\u636e\u4f20\u8f93\u6548\u7387\u3002\u6b64\u5916\uff0cDMA\u901a\u4fe1\u4e32\u53e3\u914d\u7f6e\u8fd8\u53ef\u4ee5\u51cf\u5c11CPU\u7684\u8d1f\u62c5\uff0c\u56e0\u4e3a\u5b83\u53ef\u4ee5\u8ba9CPU\u4e0d\u7528\u5904\u7406\u6570\u636e\u4f20\u8f93\u7684\u4efb\u52a1\uff0c\u4ece\u800c\u8282\u7701CPU\u7684\u8d44\u6e90\u3002<\/p>\n<h3>&emsp;&emsp;DMA\u901a\u4fe1\u4e32\u53e3\u914d\u7f6e\u7684\u7f3a\u70b9<\/h3>\n<p>&emsp;&emsp;DMA\u901a\u4fe1\u4e32\u53e3\u914d\u7f6e\u7684\u7f3a\u70b9\u5728\u4e8e\u5b83\u9700\u8981\u6d88\u8017\u66f4\u591a\u7684\u5185\u5b58\u8d44\u6e90\uff0c\u56e0\u4e3aDMA\u6280\u672f\u53ef\u4ee5\u8ba9\u5916\u90e8\u8bbe\u5907\u76f4\u63a5\u8bbf\u95ee\u5185\u5b58\uff0c\u56e0\u6b64\u9700\u8981\u66f4\u591a\u7684\u5185\u5b58\u6765\u5b58\u50a8\u6570\u636e\u3002\u53e6\u5916\uff0cDMA\u901a\u4fe1\u4e32\u53e3\u914d\u7f6e\u8fd8\u4f1a\u589e\u52a0\u7cfb\u7edf\u7684\u590d\u6742\u5ea6\uff0c\u56e0\u4e3a\u5b83\u9700\u8981\u914d\u7f6e\u590d\u6742\u7684\u786c\u4ef6\u548c\u8f6f\u4ef6\u7cfb\u7edf\uff0c\u4ece\u800c\u589e\u52a0\u7cfb\u7edf\u7684\u590d\u6742\u5ea6\u3002<\/p>\n<h2 style=\"text-align: center;\">\u5982\u4f55\u6709\u6548\u5730\u4f7f\u7528DMA\u901a\u4fe1\u4e32\u53e3\u914d\u7f6e<\/h2>\n<p>&emsp;&emsp;\u8981\u6709\u6548\u5730\u4f7f\u7528DMA\u901a\u4fe1\u4e32\u53e3\u914d\u7f6e\uff0c\u9996\u5148\u8981\u786e\u4fdd\u5916\u90e8\u8bbe\u5907\u53ef\u4ee5\u6b63\u786e\u8fde\u63a5\u5230\u8ba1\u7b97\u673a\uff0c\u5e76\u4e14\u786e\u4fdd\u4e32\u53e3\u9a71\u52a8\u7a0b\u5e8f\u53ef\u4ee5\u6b63\u5e38\u5de5\u4f5c\u3002\u5176\u6b21\uff0c\u8981\u786e\u4fddDMA\u6280\u672f\u53ef\u4ee5\u6b63\u5e38\u5de5\u4f5c\uff0c\u8fd9\u9700\u8981\u6b63\u786e\u914d\u7f6eDMA\u63a7\u5236\u5668\uff0c\u4ee5\u53ca\u6b63\u786e\u914d\u7f6eDMA\u901a\u9053\u3002\u6700\u540e\uff0c\u8981\u786e\u4fdd\u7cfb\u7edf\u53ef\u4ee5\u6b63\u786e\u5904\u7406\u4f20\u8f93\u7684\u6570\u636e\uff0c\u8fd9\u9700\u8981\u6b63\u786e\u914d\u7f6e\u7cfb\u7edf\u8f6f\u4ef6\uff0c\u4ee5\u53ca\u6b63\u786e\u914d\u7f6e\u5916\u90e8\u8bbe\u5907\u7684\u9a71\u52a8\u7a0b\u5e8f\u3002<\/p>\n<h2 style=\"text-align: center;\">\u603b\u7ed3<\/h2>\n<p>&emsp;&emsp;<strong>DMA\u901a\u4fe1\u4e32\u53e3\u914d\u7f6e\u662f\u4e00\u79cd\u53ef\u4ee5\u8ba9\u5916\u90e8\u8bbe\u5907\u76f4\u63a5\u8bbf\u95ee\u5185\u5b58\u7684\u6280\u672f\uff0c\u5b83\u53ef\u4ee5\u5927\u5927\u63d0\u9ad8\u6570\u636e\u4f20\u8f93\u6548\u7387\u3002<\/strong>DMA\u901a\u4fe1\u4e32\u53e3\u914d\u7f6e\u7684\u4f18\u52bf\u5728\u4e8e\u53ef\u4ee5\u63d0\u9ad8\u6570\u636e\u4f20\u8f93\u6548\u7387\uff0c\u51cf\u5c11CPU\u7684\u8d1f\u62c5\uff0c\u4f46\u4e5f\u6709\u4e00\u4e9b\u7f3a\u70b9\uff0c\u6bd4\u5982\u9700\u8981\u66f4\u591a\u7684\u5185\u5b58\u8d44\u6e90\uff0c\u4ee5\u53ca\u589e\u52a0\u7cfb\u7edf\u7684\u590d\u6742\u5ea6\u3002\u8981\u6709\u6548\u5730\u4f7f\u7528DMA\u901a\u4fe1\u4e32\u53e3\u914d\u7f6e\uff0c\u9664\u4e86\u6b63\u786e\u914d\u7f6eDMA\u63a7\u5236\u5668\u3001DMA\u901a\u9053\u4ee5\u53ca\u7cfb\u7edf\u8f6f\u4ef6\u5916\uff0c\u8fd8\u8981\u786e\u4fdd\u5916\u90e8\u8bbe\u5907\u53ef\u4ee5\u6b63\u786e\u8fde\u63a5\u5230\u8ba1\u7b97\u673a\uff0c\u4ee5\u53ca\u6b63\u786e\u914d\u7f6e\u5916\u90e8\u8bbe\u5907\u7684\u9a71\u52a8\u7a0b\u5e8f\u3002<\/p>\n","protected":false},"excerpt":{"rendered":"<p>DMA\uff08DirectMemoryAccess\uff09\u662f\u4e00\u79cd\u5141\u8bb8\u5916\u90e8\u8bbe\u5907\u76f4\u63a5\u8bbf\u95ee\u5185\u5b58\u7684\u6280\u672f\uff0c\u5b83\u53ef\u4ee5\u8ba9\u5916\u90e8\u8bbe\u5907\u66f4\u5feb\u5730\u8bbf\u95ee\u5185\u5b58\uff0c\u63d0\u9ad8\u6570\u636e\u4f20\u8f93\u6548\u7387\u3002DMA\u901a\u4fe1\u4e32\u53e3\u914d\u7f6e\u6280\u672f\u662f\u4e00\u79cd\u53ef\u4ee5<\/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-45991","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\/45991","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=45991"}],"version-history":[{"count":0,"href":"https:\/\/www.techphant.cn\/wp-json\/wp\/v2\/posts\/45991\/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=45991"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"https:\/\/www.techphant.cn\/wp-json\/wp\/v2\/categories?post=45991"},{"taxonomy":"post_tag","embeddable":true,"href":"https:\/\/www.techphant.cn\/wp-json\/wp\/v2\/tags?post=45991"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}