{"id":32737,"date":"2023-09-16T09:34:16","date_gmt":"2023-09-16T01:34:16","guid":{"rendered":"https:\/\/www.techphant.cn\/?p=32737"},"modified":"2023-09-16T09:34:16","modified_gmt":"2023-09-16T01:34:16","slug":"ckdssmys-2","status":"publish","type":"post","link":"https:\/\/www.techphant.cn\/blog\/32737.html","title":{"rendered":"\u4e32\u53e3DMA\u662f\u4ec0\u4e48\u610f\u601d\uff1f"},"content":{"rendered":"

  \u4e32\u53e3DMA\u662f\u6307\u4e32\u884c\u5b58\u50a8\u5668\u8bbf\u95ee\u63a7\u5236\u5668\uff08SAC\uff09\u7684Direct Memory Access\uff08DMA\uff09\u529f\u80fd\uff0c\u5b83\u662f\u4e00\u79cd\u7528\u4e8e\u8bbf\u95ee\u5185\u5b58\u7684\u6280\u672f\uff0c\u53ef\u4ee5\u5927\u5927\u63d0\u9ad8\u4e32\u884c\u5b58\u50a8\u5668\u7684\u6027\u80fd\u3002\u672c\u6587\u5c06\u89e3\u91ca\u4e32\u53e3DMA\u7684\u4e00\u822c\u539f\u7406\uff0c\u4ee5\u53ca\u5b83\u7684\u4f18\u52bf\u548c\u5e94\u7528\u3002<\/p>\n

\u4e32\u53e3DMA\u7684\u6982\u5ff5<\/h2>\n

  \u4e32\u53e3DMA\u662f\u4e00\u79cd\u7528\u4e8e\u8bbf\u95ee\u5185\u5b58\u7684\u6280\u672f\uff0c\u53ef\u4ee5\u5927\u5927\u63d0\u9ad8\u4e32\u884c\u5b58\u50a8\u5668\u7684\u6027\u80fd\u3002\u5b83\u901a\u8fc7\u4f7f\u7528\u4e13\u7528\u7684\u786c\u4ef6\u6765\u5b9e\u73b0\u5185\u5b58\u7684\u76f4\u63a5\u8bbf\u95ee\uff0c\u800c\u4e0d\u9700\u8981CPU\u7684\u53c2\u4e0e\uff0c\u4ece\u800c\u6781\u5927\u5730\u63d0\u9ad8\u4e32\u884c\u5b58\u50a8\u5668\u7684\u6027\u80fd\u3002<\/p>\n

\u4e32\u53e3DMA\u7684\u5de5\u4f5c\u539f\u7406<\/h3>\n

  \u4e32\u53e3DMA\u7684\u5de5\u4f5c\u539f\u7406\u662f\uff0c\u5f53\u5b83\u68c0\u6d4b\u5230\u4e00\u4e2a\u4e32\u884c\u5b58\u50a8\u5668\u8bbf\u95ee\u65f6\uff0c\u5b83\u4f1a\u76f4\u63a5\u5c06\u6570\u636e\u4ece\u5185\u5b58\u4f20\u8f93\u5230\u4e32\u884c\u5b58\u50a8\u5668\uff0c\u800c\u4e0d\u9700\u8981CPU\u7684\u53c2\u4e0e\u3002\u8fd9\u6837\uff0c\u5c31\u53ef\u4ee5\u5927\u5927\u63d0\u9ad8\u4e32\u884c\u5b58\u50a8\u5668\u7684\u6027\u80fd\uff0c\u800c\u4e14\u8fd8\u53ef\u4ee5\u51cf\u5c11CPU\u7684\u8d1f\u8f7d\u3002<\/p>\n

\u4e32\u53e3DMA\u7684\u4f18\u52bf<\/h3>\n

  \u4e32\u53e3DMA\u7684\u4f18\u52bf\u5728\u4e8e\u5b83\u53ef\u4ee5\u5927\u5927\u63d0\u9ad8\u4e32\u884c\u5b58\u50a8\u5668\u7684\u6027\u80fd\uff0c\u540c\u65f6\u8fd8\u53ef\u4ee5\u51cf\u5c11CPU\u7684\u8d1f\u8f7d\u3002\u7531\u4e8e\u5b83\u53ef\u4ee5\u76f4\u63a5\u5c06\u6570\u636e\u4ece\u5185\u5b58\u4f20\u8f93\u5230\u4e32\u884c\u5b58\u50a8\u5668\uff0c\u800c\u4e0d\u9700\u8981CPU\u7684\u53c2\u4e0e\uff0c\u56e0\u6b64\u53ef\u4ee5\u6781\u5927\u5730\u63d0\u9ad8\u4e32\u884c\u5b58\u50a8\u5668\u7684\u6027\u80fd\u3002<\/p>\n

\u4e32\u53e3DMA\u7684\u5e94\u7528<\/h3>\n

  \u4e32\u53e3DMA\u53ef\u4ee5\u5e94\u7528\u4e8e\u591a\u79cd\u5e94\u7528\uff0c\u4f8b\u5982\uff0c\u5b83\u53ef\u4ee5\u7528\u4e8e\u5b9e\u65f6\u6570\u636e\u4f20\u8f93\uff0c\u5982\u89c6\u9891\u4f20\u8f93\u3001\u8bed\u97f3\u4f20\u8f93\u7b49\uff1b\u5b83\u8fd8\u53ef\u4ee5\u7528\u4e8e\u591a\u5a92\u4f53\u5e94\u7528\uff0c\u4f8b\u5982\u89c6\u9891\u6e38\u620f\u3001\u865a\u62df\u73b0\u5b9e\u7b49\uff1b\u5b83\u8fd8\u53ef\u4ee5\u7528\u4e8e\u5927\u6570\u636e\u5904\u7406\uff0c\u5982\u79d1\u5b66\u8ba1\u7b97\u3001\u6a21\u5f0f\u8bc6\u522b\u7b49\u3002<\/p>\n

\u603b\u7ed3<\/h2>\n

  \u672c\u6587\u4ecb\u7ecd\u4e86\u4e32\u53e3DMA\u7684\u4e00\u822c\u539f\u7406\uff0c\u4ee5\u53ca\u5b83\u7684\u4f18\u52bf\u548c\u5e94\u7528\u3002<\/strong>\u4e32\u53e3DMA\u53ef\u4ee5\u5927\u5927\u63d0\u9ad8\u4e32\u884c\u5b58\u50a8\u5668\u7684\u6027\u80fd\uff0c\u540c\u65f6\u8fd8\u53ef\u4ee5\u51cf\u5c11CPU\u7684\u8d1f\u8f7d\uff0c\u5e76\u53ef\u4ee5\u5e94\u7528\u4e8e\u591a\u79cd\u5e94\u7528\uff0c\u5982\u5b9e\u65f6\u6570\u636e\u4f20\u8f93\u3001\u591a\u5a92\u4f53\u5e94\u7528\u548c\u5927\u6570\u636e\u5904\u7406\u3002<\/p>\n","protected":false},"excerpt":{"rendered":"

\u4e32\u53e3DMA\u662f\u6307\u4e32\u884c\u5b58\u50a8\u5668\u8bbf\u95ee\u63a7\u5236\u5668\uff08SAC\uff09\u7684Direct Memory Access\uff08DMA\uff09\u529f\u80fd\uff0c\u5b83\u662f\u4e00\u79cd\u7528\u4e8e\u8bbf\u95ee\u5185\u5b58\u7684\u6280\u672f\uff0c\u53ef\u4ee5\u5927\u5927\u63d0\u9ad8\u4e32\u884c\u5b58\u50a8\u5668\u7684\u6027\u80fd\u3002\u672c\u6587\u5c06\u89e3\u91ca<\/p>\n","protected":false},"author":1,"featured_media":3671,"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-32737","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\/32737","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=32737"}],"version-history":[{"count":0,"href":"https:\/\/www.techphant.cn\/wp-json\/wp\/v2\/posts\/32737\/revisions"}],"wp:featuredmedia":[{"embeddable":true,"href":"https:\/\/www.techphant.cn\/wp-json\/wp\/v2\/media\/3671"}],"wp:attachment":[{"href":"https:\/\/www.techphant.cn\/wp-json\/wp\/v2\/media?parent=32737"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"https:\/\/www.techphant.cn\/wp-json\/wp\/v2\/categories?post=32737"},{"taxonomy":"post_tag","embeddable":true,"href":"https:\/\/www.techphant.cn\/wp-json\/wp\/v2\/tags?post=32737"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}