{"id":61738,"date":"2023-10-29T07:53:15","date_gmt":"2023-10-28T23:53:15","guid":{"rendered":"\/\/www.dealsbon.com\/?p=61738"},"modified":"2023-10-29T07:53:15","modified_gmt":"2023-10-28T23:53:15","slug":"dcssydsjgs","status":"publish","type":"post","link":"\/\/www.dealsbon.com\/blog\/61738.html","title":{"rendered":"DMA\u4f20\u8f93\u4f7f\u7528\u7684\u6570\u636e\u683c\u5f0f"},"content":{"rendered":"

  Direct Memory Access\uff08DMA\uff09\u662f\u4e00\u79cd\u7528\u4e8e\u4f20\u8f93\u6570\u636e\u7684\u6280\u672f\uff0c\u5b83\u53ef\u4ee5\u5927\u5927\u63d0\u9ad8\u8ba1\u7b97\u673a\u7cfb\u7edf\u7684\u6027\u80fd\u3002\u5728DMA\u4f20\u8f93\u4e2d\uff0c\u6570\u636e\u53ef\u4ee5\u4ee5\u591a\u79cd\u683c\u5f0f\u4f20\u8f93\uff0c\u8fd9\u4e9b\u683c\u5f0f\u53ef\u4ee5\u6839\u636e\u5e94\u7528\u7a0b\u5e8f\u7684\u4e0d\u540c\u800c\u53d8\u5316\u3002\u672c\u6587\u5c06\u4ecb\u7ecdDMA\u4f20\u8f93\u4f7f\u7528\u7684\u6570\u636e\u683c\u5f0f\uff0c\u5e76\u8ba8\u8bba\u5b83\u4eec\u7684\u4f18\u7f3a\u70b9\u3002<\/p>\n

\u6570\u636e\u5305\u683c\u5f0f<\/h2>\n

  \u6570\u636e\u5305\u683c\u5f0f\u662fDMA\u4f20\u8f93\u4e2d\u6700\u5e38\u7528\u7684\u683c\u5f0f\u3002\u5b83\u662f\u4e00\u79cd\u5c06\u6570\u636e\u5206\u6210\u82e5\u5e72\u4e2a\u5c0f\u5757\uff0c\u5e76\u5c06\u6bcf\u4e2a\u5c0f\u5757\u653e\u5165\u4e00\u4e2a\u72ec\u7acb\u7684\u5305\u4e2d\u7684\u683c\u5f0f\u3002\u5728\u4f20\u8f93\u8fc7\u7a0b\u4e2d\uff0c\u6bcf\u4e2a\u5305\u90fd\u4f1a\u6709\u4e00\u4e2a\u5934\u90e8\uff0c\u7528\u4e8e\u6807\u8bb0\u8fd9\u4e2a\u5305\u7684ID\u53ca\u5176\u4ed6\u76f8\u5173\u4fe1\u606f\u3002\u8fd9\u6837\uff0c\u63a5\u6536\u7aef\u53ef\u4ee5\u6839\u636e\u5934\u90e8\u4fe1\u606f\u6765\u8bc6\u522b\u6bcf\u4e2a\u5305\uff0c\u5e76\u5c06\u5b83\u4eec\u91cd\u65b0\u7ec4\u5408\u6210\u539f\u59cb\u7684\u6570\u636e\u3002<\/p>\n

  \u6570\u636e\u5305\u683c\u5f0f\u7684\u4f18\u70b9\u662f\uff0c\u5b83\u53ef\u4ee5\u6709\u6548\u5730\u51cf\u5c11\u7f51\u7edc\u4f20\u8f93\u4e2d\u7684\u6570\u636e\u4e22\u5931\uff0c\u56e0\u4e3a\u5373\u4f7f\u6709\u4e00\u4e2a\u5305\u4e22\u5931\uff0c\u63a5\u6536\u7aef\u4e5f\u53ef\u4ee5\u6839\u636e\u5176\u4ed6\u5305\u6765\u91cd\u65b0\u7ec4\u5408\u6570\u636e\u3002\u53e6\u5916\uff0c\u6570\u636e\u5305\u683c\u5f0f\u53ef\u4ee5\u6709\u6548\u5730\u964d\u4f4e\u7f51\u7edc\u5e26\u5bbd\u7684\u4f7f\u7528\uff0c\u56e0\u4e3a\u5b83\u53ef\u4ee5\u5c06\u5927\u91cf\u6570\u636e\u5206\u5272\u6210\u5c0f\u5757\uff0c\u4ece\u800c\u51cf\u5c11\u7f51\u7edc\u4f20\u8f93\u65f6\u95f4\u3002<\/p>\n

\u6d41\u5f0f\u683c\u5f0f<\/h2>\n

  \u6d41\u5f0f\u683c\u5f0f\u662f\u4e00\u79cd\u57fa\u4e8e\u8fde\u7eed\u6027\u7684\u6570\u636e\u4f20\u8f93\u683c\u5f0f\u3002\u5728\u8fd9\u79cd\u683c\u5f0f\u4e2d\uff0c\u6570\u636e\u4f1a\u88ab\u5206\u5272\u6210\u82e5\u5e72\u4e2a\u5c0f\u5757\uff0c\u6bcf\u4e2a\u5c0f\u5757\u90fd\u6709\u4e00\u4e2a\u5934\u90e8\uff0c\u7528\u4e8e\u6807\u8bb0\u8fd9\u4e2a\u5c0f\u5757\u7684ID\u53ca\u5176\u4ed6\u76f8\u5173\u4fe1\u606f\u3002\u8fd9\u6837\uff0c\u53d1\u9001\u7aef\u53ef\u4ee5\u5c06\u8fd9\u4e9b\u5c0f\u5757\u6309\u987a\u5e8f\u53d1\u9001\uff0c\u63a5\u6536\u7aef\u53ef\u4ee5\u6839\u636e\u5934\u90e8\u4fe1\u606f\u6765\u8bc6\u522b\u6bcf\u4e2a\u5c0f\u5757\uff0c\u5e76\u5c06\u5b83\u4eec\u91cd\u65b0\u7ec4\u5408\u6210\u539f\u59cb\u7684\u6570\u636e\u3002<\/p>\n

  \u6d41\u5f0f\u683c\u5f0f\u7684\u4f18\u70b9\u662f\uff0c\u5b83\u53ef\u4ee5\u6709\u6548\u5730\u51cf\u5c11\u7f51\u7edc\u4f20\u8f93\u4e2d\u7684\u6570\u636e\u4e22\u5931\uff0c\u56e0\u4e3a\u5373\u4f7f\u6709\u4e00\u4e2a\u5c0f\u5757\u4e22\u5931\uff0c\u63a5\u6536\u7aef\u4e5f\u53ef\u4ee5\u6839\u636e\u5176\u4ed6\u5c0f\u5757\u6765\u91cd\u65b0\u7ec4\u5408\u6570\u636e\u3002\u53e6\u5916\uff0c\u6d41\u5f0f\u683c\u5f0f\u53ef\u4ee5\u6709\u6548\u5730\u964d\u4f4e\u7f51\u7edc\u5e26\u5bbd\u7684\u4f7f\u7528\uff0c\u56e0\u4e3a\u5b83\u53ef\u4ee5\u5c06\u5927\u91cf\u6570\u636e\u5206\u5272\u6210\u5c0f\u5757\uff0c\u4ece\u800c\u51cf\u5c11\u7f51\u7edc\u4f20\u8f93\u65f6\u95f4\u3002<\/p>\n

\u603b\u7ed3<\/h2>\n

  DMA\u4f20\u8f93\u4f7f\u7528\u7684\u6570\u636e\u683c\u5f0f\u5305\u62ec\u6570\u636e\u5305\u683c\u5f0f\u548c\u6d41\u5f0f\u683c\u5f0f\u3002<\/strong>\u8fd9\u4e24\u79cd\u683c\u5f0f\u90fd\u53ef\u4ee5\u6709\u6548\u5730\u51cf\u5c11\u7f51\u7edc\u4f20\u8f93\u4e2d\u7684\u6570\u636e\u4e22\u5931\uff0c\u5e76\u964d\u4f4e\u7f51\u7edc\u5e26\u5bbd\u7684\u4f7f\u7528\u3002\u56e0\u6b64\uff0c\u5b83\u4eec\u5728\u7f51\u7edc\u4f20\u8f93\u4e2d\u90fd\u6709\u91cd\u8981\u7684\u4f5c\u7528\u3002<\/p>\n","protected":false},"excerpt":{"rendered":"

DirectMemoryAccess\uff08DMA\uff09\u662f\u4e00\u79cd\u7528\u4e8e\u4f20\u8f93\u6570\u636e\u7684\u6280\u672f\uff0c\u5b83\u53ef\u4ee5\u5927\u5927\u63d0\u9ad8\u8ba1\u7b97\u673a\u7cfb\u7edf\u7684\u6027\u80fd\u3002\u5728DMA\u4f20\u8f93\u4e2d\uff0c\u6570\u636e\u53ef\u4ee5\u4ee5\u591a\u79cd\u683c\u5f0f\u4f20\u8f93\uff0c\u8fd9\u4e9b\u683c\u5f0f\u53ef\u4ee5\u6839\u636e\u5e94\u7528\u7a0b<\/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-61738","post","type-post","status-publish","format-standard","has-post-thumbnail","hentry","category-blog","tag-dzjs"],"_links":{"self":[{"href":"\/\/www.dealsbon.com\/wp-json\/wp\/v2\/posts\/61738"}],"collection":[{"href":"\/\/www.dealsbon.com\/wp-json\/wp\/v2\/posts"}],"about":[{"href":"\/\/www.dealsbon.com\/wp-json\/wp\/v2\/types\/post"}],"author":[{"embeddable":true,"href":"\/\/www.dealsbon.com\/wp-json\/wp\/v2\/users\/1"}],"replies":[{"embeddable":true,"href":"\/\/www.dealsbon.com\/wp-json\/wp\/v2\/comments?post=61738"}],"version-history":[{"count":0,"href":"\/\/www.dealsbon.com\/wp-json\/wp\/v2\/posts\/61738\/revisions"}],"wp:featuredmedia":[{"embeddable":true,"href":"\/\/www.dealsbon.com\/wp-json\/wp\/v2\/media\/1839"}],"wp:attachment":[{"href":"\/\/www.dealsbon.com\/wp-json\/wp\/v2\/media?parent=61738"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"\/\/www.dealsbon.com\/wp-json\/wp\/v2\/categories?post=61738"},{"taxonomy":"post_tag","embeddable":true,"href":"\/\/www.dealsbon.com\/wp-json\/wp\/v2\/tags?post=61738"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}