{"id":60410,"date":"2023-11-04T19:14:01","date_gmt":"2023-11-04T11:14:01","guid":{"rendered":"https:\/\/www.techphant.cn\/?p=60410"},"modified":"2023-11-04T19:14:01","modified_gmt":"2023-11-04T11:14:01","slug":"dzdyxj","status":"publish","type":"post","link":"https:\/\/www.techphant.cn\/blog\/60410.html","title":{"rendered":"DMA\u4e2d\u65ad\u4f18\u5148\u7ea7"},"content":{"rendered":"<p>&emsp;&emsp;DMA\uff08Direct Memory Access\uff09\u4e2d\u65ad\u4f18\u5148\u7ea7\u662f\u4e00\u4e2a\u91cd\u8981\u7684\u6982\u5ff5\uff0c\u5b83\u51b3\u5b9a\u4e86DMA\u8bbe\u5907\u5728\u7cfb\u7edf\u4e2d\u7684\u4f18\u5148\u7ea7\u3002\u901a\u8fc7\u63a7\u5236DMA\u4e2d\u65ad\u4f18\u5148\u7ea7\uff0c\u53ef\u4ee5\u66f4\u597d\u5730\u63a7\u5236\u7cfb\u7edf\u4e2d\u7684\u8bbe\u5907\uff0c\u4ece\u800c\u63d0\u9ad8\u7cfb\u7edf\u7684\u6027\u80fd\u548c\u53ef\u9760\u6027\u3002\u672c\u6587\u5c06\u4ecb\u7ecdDMA\u4e2d\u65ad\u4f18\u5148\u7ea7\u7684\u6982\u5ff5\uff0c\u4ee5\u53ca\u5982\u4f55\u901a\u8fc7\u63a7\u5236DMA\u4e2d\u65ad\u4f18\u5148\u7ea7\u6765\u63d0\u9ad8\u7cfb\u7edf\u6027\u80fd\u3002<\/p>\n<h2 style=\"text-align: center;\">\u4ec0\u4e48\u662fDMA\u4e2d\u65ad\u4f18\u5148\u7ea7\uff1f<\/h2>\n<p>&emsp;&emsp;<strong>DMA\u4e2d\u65ad\u4f18\u5148\u7ea7\u662f\u6307\u7cfb\u7edf\u4e2dDMA\u8bbe\u5907\u5728\u63a5\u6536\u548c\u5904\u7406\u4e2d\u65ad\u65f6\u7684\u4f18\u5148\u7ea7\u3002<\/strong>\u5f53\u7cfb\u7edf\u4e2d\u7684\u591a\u4e2aDMA\u8bbe\u5907\u540c\u65f6\u53d1\u51fa\u4e2d\u65ad\u65f6\uff0c\u7cfb\u7edf\u6839\u636eDMA\u8bbe\u5907\u7684\u4e2d\u65ad\u4f18\u5148\u7ea7\u6765\u51b3\u5b9a\u54ea\u4e2a\u8bbe\u5907\u5148\u63a5\u6536\u548c\u5904\u7406\u4e2d\u65ad\u3002\u4e00\u822c\u6765\u8bf4\uff0c\u4f18\u5148\u7ea7\u8d8a\u9ad8\u7684DMA\u8bbe\u5907\u5148\u63a5\u6536\u548c\u5904\u7406\u4e2d\u65ad\uff0c\u4f18\u5148\u7ea7\u8d8a\u4f4e\u7684DMA\u8bbe\u5907\u540e\u63a5\u6536\u548c\u5904\u7406\u4e2d\u65ad\u3002<\/p>\n<h2 style=\"text-align: center;\">\u5982\u4f55\u63a7\u5236DMA\u4e2d\u65ad\u4f18\u5148\u7ea7\uff1f<\/h2>\n<h3>&emsp;&emsp;1.\u4f7f\u7528\u4e2d\u65ad\u4f18\u5148\u7ea7\u5bc4\u5b58\u5668<\/h3>\n<p>&emsp;&emsp;\u5927\u591a\u6570DMA\u8bbe\u5907\u90fd\u5177\u6709\u4e2d\u65ad\u4f18\u5148\u7ea7\u5bc4\u5b58\u5668\uff0c\u7528\u4e8e\u63a7\u5236DMA\u8bbe\u5907\u7684\u4e2d\u65ad\u4f18\u5148\u7ea7\u3002\u8fd9\u4e9b\u5bc4\u5b58\u5668\u53ef\u4ee5\u7528\u6765\u8bbe\u7f6eDMA\u8bbe\u5907\u7684\u4e2d\u65ad\u4f18\u5148\u7ea7\uff0c\u4ece\u800c\u63a7\u5236DMA\u8bbe\u5907\u5728\u7cfb\u7edf\u4e2d\u7684\u4f18\u5148\u7ea7\u3002<\/p>\n<h3>&emsp;&emsp;2.\u4f7f\u7528\u4e2d\u65ad\u63a7\u5236\u5668<\/h3>\n<p>&emsp;&emsp;\u5927\u591a\u6570\u7cfb\u7edf\u90fd\u5177\u6709\u4e2d\u65ad\u63a7\u5236\u5668\uff0c\u7528\u4e8e\u63a7\u5236\u548c\u7ba1\u7406\u4e2d\u65ad\u3002\u901a\u8fc7\u4f7f\u7528\u4e2d\u65ad\u63a7\u5236\u5668\uff0c\u53ef\u4ee5\u66f4\u597d\u5730\u63a7\u5236DMA\u8bbe\u5907\u7684\u4e2d\u65ad\u4f18\u5148\u7ea7\uff0c\u4ece\u800c\u66f4\u597d\u5730\u63a7\u5236DMA\u8bbe\u5907\u5728\u7cfb\u7edf\u4e2d\u7684\u4f18\u5148\u7ea7\u3002<\/p>\n<h3>&emsp;&emsp;3.\u4f7f\u7528DMA\u63a7\u5236\u5668<\/h3>\n<p>&emsp;&emsp;DMA\u63a7\u5236\u5668\u662f\u4e00\u79cd\u7279\u6b8a\u7684\u63a7\u5236\u5668\uff0c\u4e13\u95e8\u7528\u4e8e\u63a7\u5236DMA\u8bbe\u5907\u3002\u901a\u8fc7\u4f7f\u7528DMA\u63a7\u5236\u5668\uff0c\u53ef\u4ee5\u66f4\u597d\u5730\u63a7\u5236DMA\u8bbe\u5907\u7684\u4e2d\u65ad\u4f18\u5148\u7ea7\uff0c\u4ece\u800c\u66f4\u597d\u5730\u63a7\u5236DMA\u8bbe\u5907\u5728\u7cfb\u7edf\u4e2d\u7684\u4f18\u5148\u7ea7\u3002<\/p>\n<h2 style=\"text-align: center;\">\u603b\u7ed3<\/h2>\n<p>&emsp;&emsp;<strong>DMA\u4e2d\u65ad\u4f18\u5148\u7ea7\u662f\u6307\u7cfb\u7edf\u4e2dDMA\u8bbe\u5907\u5728\u63a5\u6536\u548c\u5904\u7406\u4e2d\u65ad\u65f6\u7684\u4f18\u5148\u7ea7\u3002<\/strong>\u901a\u8fc7\u63a7\u5236DMA\u4e2d\u65ad\u4f18\u5148\u7ea7\uff0c\u53ef\u4ee5\u66f4\u597d\u5730\u63a7\u5236\u7cfb\u7edf\u4e2d\u7684\u8bbe\u5907\uff0c\u4ece\u800c\u63d0\u9ad8\u7cfb\u7edf\u7684\u6027\u80fd\u548c\u53ef\u9760\u6027\u3002\u53ef\u4ee5\u901a\u8fc7\u4f7f\u7528\u4e2d\u65ad\u4f18\u5148\u7ea7\u5bc4\u5b58\u5668\u3001\u4e2d\u65ad\u63a7\u5236\u5668\u548cDMA\u63a7\u5236\u5668\u6765\u63a7\u5236DMA\u4e2d\u65ad\u4f18\u5148\u7ea7\u3002<\/p>\n","protected":false},"excerpt":{"rendered":"<p>DMA\uff08DirectMemoryAccess\uff09\u4e2d\u65ad\u4f18\u5148\u7ea7\u662f\u4e00\u4e2a\u91cd\u8981\u7684\u6982\u5ff5\uff0c\u5b83\u51b3\u5b9a\u4e86DMA\u8bbe\u5907\u5728\u7cfb\u7edf\u4e2d\u7684\u4f18\u5148\u7ea7\u3002\u901a\u8fc7\u63a7\u5236DMA\u4e2d\u65ad\u4f18\u5148\u7ea7\uff0c\u53ef\u4ee5\u66f4\u597d\u5730\u63a7\u5236\u7cfb\u7edf\u4e2d\u7684\u8bbe\u5907\uff0c\u4ece<\/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":[305],"class_list":["post-60410","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\/60410","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=60410"}],"version-history":[{"count":0,"href":"https:\/\/www.techphant.cn\/wp-json\/wp\/v2\/posts\/60410\/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=60410"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"https:\/\/www.techphant.cn\/wp-json\/wp\/v2\/categories?post=60410"},{"taxonomy":"post_tag","embeddable":true,"href":"https:\/\/www.techphant.cn\/wp-json\/wp\/v2\/tags?post=60410"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}