{"id":62482,"date":"2023-11-01T23:44:55","date_gmt":"2023-11-01T15:44:55","guid":{"rendered":"https:\/\/www.techphant.cn\/?p=62482"},"modified":"2023-11-01T23:44:55","modified_gmt":"2023-11-01T15:44:55","slug":"dcsdsjdx","status":"publish","type":"post","link":"https:\/\/www.techphant.cn\/blog\/62482.html","title":{"rendered":"DMA\u4f20\u8f93\u7684\u6570\u636e\u5927\u5c0f"},"content":{"rendered":"<p>&emsp;&emsp;DMA\uff08Direct Memory Access\uff09\u662f\u4e00\u79cd\u4e3b\u673a\u5904\u7406\u5668\u53ef\u4ee5\u76f4\u63a5\u8bbf\u95ee\u5185\u5b58\u7684\u6280\u672f\u3002\u5b83\u53ef\u4ee5\u5927\u5927\u63d0\u9ad8\u7cfb\u7edf\u7684\u6027\u80fd\uff0c\u56e0\u4e3a\u5b83\u53ef\u4ee5\u51cf\u5c11CPU\u7684\u5de5\u4f5c\u91cf\u3002DMA\u4f20\u8f93\u7684\u6570\u636e\u5927\u5c0f\u53d6\u51b3\u4e8e\u786c\u4ef6\u8bbe\u8ba1\uff0c\u4f46\u4e00\u822c\u6765\u8bf4\uff0c\u6bcf\u6b21\u4f20\u8f93\u7684\u6570\u636e\u5927\u5c0f\u57281\u5b57\u8282\u523064KB\u4e4b\u95f4\u3002<\/p>\n<h2 style=\"text-align: center;\">DMA\u4f20\u8f93\u7684\u6570\u636e\u5927\u5c0f\u7684\u4f18\u52bf<\/h2>\n<p>&emsp;&emsp;DMA\u4f20\u8f93\u7684\u6570\u636e\u5927\u5c0f\u6bd4\u5176\u4ed6\u4f20\u8f93\u6280\u672f\u66f4\u5927\uff0c\u8fd9\u4f7f\u5f97DMA\u4f20\u8f93\u7684\u6570\u636e\u91cf\u66f4\u5927\uff0c\u66f4\u6709\u6548\u7387\u3002DMA\u4f20\u8f93\u7684\u6570\u636e\u5927\u5c0f\u53ef\u4ee5\u66f4\u5feb\u5730\u4f20\u8f93\u66f4\u591a\u7684\u6570\u636e\uff0c\u800c\u4e0d\u9700\u8981CPU\u53c2\u4e0e\uff0c\u4ece\u800c\u51cf\u5c11CPU\u7684\u5de5\u4f5c\u91cf\u3002\u540c\u65f6\uff0cDMA\u4f20\u8f93\u7684\u6570\u636e\u5927\u5c0f\u53ef\u4ee5\u66f4\u6709\u6548\u5730\u5229\u7528\u7cfb\u7edf\u8d44\u6e90\uff0c\u63d0\u9ad8\u7cfb\u7edf\u7684\u6027\u80fd\u3002<\/p>\n<h3>&emsp;&emsp;DMA\u4f20\u8f93\u7684\u6570\u636e\u5927\u5c0f\u7684\u7f3a\u70b9<\/h3>\n<p>&emsp;&emsp;\u5c3d\u7ba1DMA\u4f20\u8f93\u7684\u6570\u636e\u5927\u5c0f\u6709\u5f88\u591a\u4f18\u52bf\uff0c\u4f46\u4e5f\u5b58\u5728\u4e00\u4e9b\u7f3a\u70b9\u3002\u9996\u5148\uff0cDMA\u4f20\u8f93\u7684\u6570\u636e\u5927\u5c0f\u53d7\u5230\u786c\u4ef6\u8bbe\u8ba1\u7684\u9650\u5236\uff0c\u53ef\u80fd\u4f1a\u9650\u5236\u7cfb\u7edf\u7684\u6027\u80fd\u3002\u5176\u6b21\uff0cDMA\u4f20\u8f93\u7684\u6570\u636e\u5927\u5c0f\u53ef\u80fd\u4f1a\u5bfc\u81f4\u7cfb\u7edf\u7684\u4e0d\u7a33\u5b9a\uff0c\u56e0\u4e3a\u5b83\u53ef\u80fd\u4f1a\u5bfc\u81f4\u7cfb\u7edf\u53d1\u751f\u6545\u969c\u3002\u6700\u540e\uff0cDMA\u4f20\u8f93\u7684\u6570\u636e\u5927\u5c0f\u53ef\u80fd\u4f1a\u5bfc\u81f4\u7cfb\u7edf\u7684\u80fd\u8017\u589e\u52a0\uff0c\u56e0\u4e3a\u5b83\u53ef\u80fd\u4f1a\u6d88\u8017\u66f4\u591a\u7684\u7535\u529b\u3002<\/p>\n<h2 style=\"text-align: center;\">DMA\u4f20\u8f93\u7684\u6570\u636e\u5927\u5c0f\u7684\u5e94\u7528<\/h2>\n<p>&emsp;&emsp;DMA\u4f20\u8f93\u7684\u6570\u636e\u5927\u5c0f\u5728\u5f88\u591a\u9886\u57df\u90fd\u5f97\u5230\u4e86\u5e7f\u6cdb\u5e94\u7528\uff0c\u6bd4\u5982\u5728\u7f51\u7edc\u901a\u4fe1\u9886\u57df\uff0cDMA\u4f20\u8f93\u7684\u6570\u636e\u5927\u5c0f\u53ef\u4ee5\u63d0\u9ad8\u7f51\u7edc\u4f20\u8f93\u901f\u5ea6\uff0c\u51cf\u5c11\u7f51\u7edc\u5ef6\u8fdf\uff1b\u5728\u5b58\u50a8\u5668\u9886\u57df\uff0cDMA\u4f20\u8f93\u7684\u6570\u636e\u5927\u5c0f\u53ef\u4ee5\u63d0\u9ad8\u5b58\u50a8\u5668\u7684\u8bfb\u5199\u901f\u5ea6\uff0c\u63d0\u9ad8\u7cfb\u7edf\u7684\u6027\u80fd\uff1b\u5728\u591a\u5a92\u4f53\u9886\u57df\uff0cDMA\u4f20\u8f93\u7684\u6570\u636e\u5927\u5c0f\u53ef\u4ee5\u63d0\u9ad8\u591a\u5a92\u4f53\u64ad\u653e\u7684\u6d41\u7545\u5ea6\uff0c\u63d0\u9ad8\u591a\u5a92\u4f53\u64ad\u653e\u7684\u8d28\u91cf\u3002<\/p>\n<h2 style=\"text-align: center;\">\u603b\u7ed3<\/h2>\n<p>&emsp;&emsp;<strong>DMA\u4f20\u8f93\u7684\u6570\u636e\u5927\u5c0f\u662f\u4e00\u79cd\u6280\u672f\uff0c\u5b83\u53ef\u4ee5\u5927\u5927\u63d0\u9ad8\u7cfb\u7edf\u7684\u6027\u80fd\uff0c\u51cf\u5c11CPU\u7684\u5de5\u4f5c\u91cf\u3002<\/strong>DMA\u4f20\u8f93\u7684\u6570\u636e\u5927\u5c0f\u53ef\u4ee5\u66f4\u6709\u6548\u5730\u5229\u7528\u7cfb\u7edf\u8d44\u6e90\uff0c\u63d0\u9ad8\u7cfb\u7edf\u7684\u6027\u80fd\u3002DMA\u4f20\u8f93\u7684\u6570\u636e\u5927\u5c0f\u5728\u5f88\u591a\u9886\u57df\u90fd\u5f97\u5230\u4e86\u5e7f\u6cdb\u5e94\u7528\uff0c\u4ece\u800c\u6539\u5584\u4e86\u7cfb\u7edf\u7684\u6027\u80fd\u3002<\/p>\n","protected":false},"excerpt":{"rendered":"<p>DMA\uff08DirectMemoryAccess\uff09\u662f\u4e00\u79cd\u4e3b\u673a\u5904\u7406\u5668\u53ef\u4ee5\u76f4\u63a5\u8bbf\u95ee\u5185\u5b58\u7684\u6280\u672f\u3002\u5b83\u53ef\u4ee5\u5927\u5927\u63d0\u9ad8\u7cfb\u7edf\u7684\u6027\u80fd\uff0c\u56e0\u4e3a\u5b83\u53ef\u4ee5\u51cf\u5c11CPU\u7684\u5de5\u4f5c\u91cf\u3002DMA\u4f20\u8f93\u7684\u6570\u636e\u5927\u5c0f\u53d6\u51b3<\/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-62482","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\/62482","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=62482"}],"version-history":[{"count":0,"href":"https:\/\/www.techphant.cn\/wp-json\/wp\/v2\/posts\/62482\/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=62482"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"https:\/\/www.techphant.cn\/wp-json\/wp\/v2\/categories?post=62482"},{"taxonomy":"post_tag","embeddable":true,"href":"https:\/\/www.techphant.cn\/wp-json\/wp\/v2\/tags?post=62482"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}