{"id":55978,"date":"2023-10-17T18:22:05","date_gmt":"2023-10-17T10:22:05","guid":{"rendered":"https:\/\/www.techphant.cn\/?p=55978"},"modified":"2023-10-17T18:22:05","modified_gmt":"2023-10-17T10:22:05","slug":"dhckzjfsdqb","status":"publish","type":"post","link":"https:\/\/www.techphant.cn\/blog\/55978.html","title":{"rendered":"DMA\u548c\u4e32\u53e3\u76f4\u63a5\u53d1\u9001\u7684\u533a\u522b"},"content":{"rendered":"

  DMA\uff08Direct Memory Access\uff09\u548c\u4e32\u53e3\u76f4\u63a5\u53d1\u9001\uff08Serial Direct Sending\uff09\u662f\u4e24\u79cd\u4e0d\u540c\u7684\u6570\u636e\u4f20\u8f93\u65b9\u5f0f\uff0c\u5b83\u4eec\u5728\u7ed3\u6784\u3001\u529f\u80fd\u548c\u4f7f\u7528\u573a\u666f\u4e0a\u6709\u7740\u660e\u663e\u7684\u533a\u522b\u3002\u672c\u6587\u5c06\u4ecb\u7ecdDMA\u548c\u4e32\u53e3\u76f4\u63a5\u53d1\u9001\u7684\u533a\u522b\uff0c\u5e2e\u52a9\u8bfb\u8005\u66f4\u597d\u5730\u4e86\u89e3\u8fd9\u4e24\u79cd\u65b9\u5f0f\u3002<\/p>\n

DMA\u7b80\u4ecb<\/h2>\n

  DMA\u662f\u4e00\u79cd\u6570\u636e\u4f20\u8f93\u65b9\u5f0f\uff0c\u5b83\u80fd\u591f\u5e2e\u52a9\u8ba1\u7b97\u673a\u82af\u7247\u5c06\u5927\u91cf\u7684\u6570\u636e\u4ece\u4e00\u4e2a\u5730\u65b9\u5feb\u901f\u4f20\u8f93\u5230\u53e6\u4e00\u4e2a\u5730\u65b9\uff0c\u800c\u4e0d\u9700\u8981CPU\u7684\u53c2\u4e0e\u3002DMA\u7684\u4e3b\u8981\u529f\u80fd\u662f\u5c06\u4e3b\u5b58\u50a8\u5668\u4e2d\u7684\u6570\u636e\u4f20\u8f93\u5230\u5916\u8bbe\uff0c\u6216\u8005\u5c06\u5916\u8bbe\u7684\u6570\u636e\u4f20\u8f93\u5230\u4e3b\u5b58\u50a8\u5668\u4e2d\u3002<\/p>\n

  DMA\u7684\u4f18\u70b9<\/h3>\n

  DMA\u7684\u4f18\u70b9\u5728\u4e8e\u5b83\u53ef\u4ee5\u5927\u5927\u63d0\u9ad8\u6570\u636e\u4f20\u8f93\u7684\u901f\u5ea6\uff0c\u800c\u4e14\u4e0d\u9700\u8981CPU\u53c2\u4e0e\uff0c\u53ef\u4ee5\u51cf\u5c11CPU\u7684\u8d1f\u62c5\uff0c\u4ece\u800c\u63d0\u9ad8\u7cfb\u7edf\u7684\u6574\u4f53\u6027\u80fd\u3002<\/p>\n

  DMA\u7684\u7f3a\u70b9<\/h3>\n

  DMA\u7684\u7f3a\u70b9\u662f\u5b83\u6bd4\u8f83\u590d\u6742\uff0c\u800c\u4e14\u9700\u8981\u4e00\u5b9a\u7684\u786c\u4ef6\u8bbe\u5907\uff0c\u6bd4\u5982DMA\u63a7\u5236\u5668\uff0c\u8fd9\u4e9b\u786c\u4ef6\u8bbe\u5907\u7684\u6210\u672c\u548c\u529f\u8017\u90fd\u6bd4\u8f83\u9ad8\u3002<\/p>\n

\u4e32\u53e3\u76f4\u63a5\u53d1\u9001\u7b80\u4ecb<\/h2>\n

  \u4e32\u53e3\u76f4\u63a5\u53d1\u9001\u662f\u4e00\u79cd\u6570\u636e\u4f20\u8f93\u65b9\u5f0f\uff0c\u5b83\u53ef\u4ee5\u5e2e\u52a9\u8ba1\u7b97\u673a\u82af\u7247\u5c06\u6570\u636e\u4ece\u4e00\u4e2a\u5730\u65b9\u5feb\u901f\u4f20\u8f93\u5230\u53e6\u4e00\u4e2a\u5730\u65b9\uff0c\u800c\u4e0d\u9700\u8981CPU\u7684\u53c2\u4e0e\u3002\u4e32\u53e3\u76f4\u63a5\u53d1\u9001\u7684\u4e3b\u8981\u529f\u80fd\u662f\u5c06\u4e3b\u5b58\u50a8\u5668\u4e2d\u7684\u6570\u636e\u4f20\u8f93\u5230\u5916\u8bbe\uff0c\u6216\u8005\u5c06\u5916\u8bbe\u7684\u6570\u636e\u4f20\u8f93\u5230\u4e3b\u5b58\u50a8\u5668\u4e2d\u3002<\/p>\n

  \u4e32\u53e3\u76f4\u63a5\u53d1\u9001\u7684\u4f18\u70b9<\/h3>\n

  \u4e32\u53e3\u76f4\u63a5\u53d1\u9001\u7684\u4f18\u70b9\u5728\u4e8e\u5b83\u53ef\u4ee5\u5927\u5927\u63d0\u9ad8\u6570\u636e\u4f20\u8f93\u7684\u901f\u5ea6\uff0c\u800c\u4e14\u4e0d\u9700\u8981CPU\u53c2\u4e0e\uff0c\u53ef\u4ee5\u51cf\u5c11CPU\u7684\u8d1f\u62c5\uff0c\u4ece\u800c\u63d0\u9ad8\u7cfb\u7edf\u7684\u6574\u4f53\u6027\u80fd\u3002<\/p>\n

  \u4e32\u53e3\u76f4\u63a5\u53d1\u9001\u7684\u7f3a\u70b9<\/h3>\n

  \u4e32\u53e3\u76f4\u63a5\u53d1\u9001\u7684\u7f3a\u70b9\u662f\u5b83\u6bd4\u8f83\u590d\u6742\uff0c\u800c\u4e14\u9700\u8981\u4e00\u5b9a\u7684\u786c\u4ef6\u8bbe\u5907\uff0c\u6bd4\u5982\u4e32\u53e3\u63a7\u5236\u5668\uff0c\u8fd9\u4e9b\u786c\u4ef6\u8bbe\u5907\u7684\u6210\u672c\u548c\u529f\u8017\u90fd\u6bd4\u8f83\u9ad8\u3002<\/p>\n

\u603b\u7ed3<\/h2>\n

  \u672c\u6587\u4ecb\u7ecd\u4e86DMA\u548c\u4e32\u53e3\u76f4\u63a5\u53d1\u9001\u7684\u533a\u522b\u3002DMA\u548c\u4e32\u53e3\u76f4\u63a5\u53d1\u9001\u90fd\u662f\u4e00\u79cd\u5feb\u901f\u4f20\u8f93\u6570\u636e\u7684\u65b9\u5f0f\uff0c\u5b83\u4eec\u80fd\u591f\u5927\u5927\u63d0\u9ad8\u6570\u636e\u4f20\u8f93\u7684\u901f\u5ea6\uff0c\u800c\u4e14\u4e0d\u9700\u8981CPU\u53c2\u4e0e\uff0c\u53ef\u4ee5\u51cf\u5c11CPU\u7684\u8d1f\u62c5\uff0c\u4ece\u800c\u63d0\u9ad8\u7cfb\u7edf\u7684\u6574\u4f53\u6027\u80fd\u3002\u4f46\u662f\uff0c\u5b83\u4eec\u90fd\u9700\u8981\u4e00\u5b9a\u7684\u786c\u4ef6\u8bbe\u5907\uff0c\u6bd4\u5982DMA\u63a7\u5236\u5668\u548c\u4e32\u53e3\u63a7\u5236\u5668\uff0c\u8fd9\u4e9b\u786c\u4ef6\u8bbe\u5907\u7684\u6210\u672c\u548c\u529f\u8017\u90fd\u6bd4\u8f83\u9ad8\u3002\u56e0\u6b64\uff0c\u5728\u9009\u62e9DMA\u548c\u4e32\u53e3\u76f4\u63a5\u53d1\u9001\u65f6\uff0c\u5e94\u8be5\u6839\u636e\u5b9e\u9645\u60c5\u51b5\u9009\u62e9\u6700\u5408\u9002\u7684\u65b9\u5f0f\u3002<\/p>\n","protected":false},"excerpt":{"rendered":"

DMA\uff08DirectMemoryAccess\uff09\u548c\u4e32\u53e3\u76f4\u63a5\u53d1\u9001\uff08SerialDirectSending\uff09\u662f\u4e24\u79cd\u4e0d\u540c\u7684\u6570\u636e\u4f20\u8f93\u65b9\u5f0f\uff0c\u5b83\u4eec\u5728\u7ed3\u6784\u3001\u529f\u80fd\u548c\u4f7f\u7528<\/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-55978","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\/55978","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=55978"}],"version-history":[{"count":0,"href":"https:\/\/www.techphant.cn\/wp-json\/wp\/v2\/posts\/55978\/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=55978"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"https:\/\/www.techphant.cn\/wp-json\/wp\/v2\/categories?post=55978"},{"taxonomy":"post_tag","embeddable":true,"href":"https:\/\/www.techphant.cn\/wp-json\/wp\/v2\/tags?post=55978"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}