{"id":63038,"date":"2023-10-26T15:42:09","date_gmt":"2023-10-26T07:42:09","guid":{"rendered":"https:\/\/www.techphant.cn\/?p=63038"},"modified":"2023-10-26T15:42:09","modified_gmt":"2023-10-26T07:42:09","slug":"sydcksddsjbl","status":"publish","type":"post","link":"https:\/\/www.techphant.cn\/blog\/63038.html","title":{"rendered":"\u4f7f\u7528DMA\u4e32\u53e3\u6536\u5230\u7684\u6570\u636e\u53d8\u4e86"},"content":{"rendered":"<p>&emsp;&emsp;DMA\uff08Direct Memory Access\uff09\u4e32\u53e3\u662f\u4e00\u79cd\u53ef\u4ee5\u4ece\u8ba1\u7b97\u673a\u5185\u5b58\u4e2d\u76f4\u63a5\u8bbf\u95ee\u6570\u636e\u7684\u6280\u672f\u3002\u5b83\u53ef\u4ee5\u8282\u7701\u5927\u91cf\u7684\u65f6\u95f4\uff0c\u4f7f\u5f97\u8ba1\u7b97\u673a\u7cfb\u7edf\u7684\u6027\u80fd\u5927\u5927\u63d0\u9ad8\u3002DMA\u4e32\u53e3\u53ef\u4ee5\u7528\u6765\u53d1\u9001\u548c\u63a5\u6536\u6570\u636e\uff0c\u5e76\u4e14\u53ef\u4ee5\u5728\u4e0d\u540c\u7684\u8ba1\u7b97\u673a\u7cfb\u7edf\u4e4b\u95f4\u4f20\u8f93\u6570\u636e\u3002<\/p>\n<h2 style=\"text-align: center;\">DMA\u4e32\u53e3\u7684\u4f18\u70b9<\/h2>\n<p>&emsp;&emsp;DMA\u4e32\u53e3\u7684\u4f18\u70b9\u975e\u5e38\u660e\u663e\uff0c\u5b83\u53ef\u4ee5\u8282\u7701\u5927\u91cf\u7684\u65f6\u95f4\uff0c\u4f7f\u5f97\u8ba1\u7b97\u673a\u7cfb\u7edf\u7684\u6027\u80fd\u5927\u5927\u63d0\u9ad8\u3002\u5b83\u53ef\u4ee5\u7528\u6765\u53d1\u9001\u548c\u63a5\u6536\u6570\u636e\uff0c\u5e76\u4e14\u53ef\u4ee5\u5728\u4e0d\u540c\u7684\u8ba1\u7b97\u673a\u7cfb\u7edf\u4e4b\u95f4\u4f20\u8f93\u6570\u636e\u3002\u6b64\u5916\uff0cDMA\u4e32\u53e3\u8fd8\u53ef\u4ee5\u652f\u6301\u591a\u79cd\u6570\u636e\u4f20\u8f93\u683c\u5f0f\uff0c\u5982RS-232\u3001RS-485\u3001USB\u7b49\uff0c\u4f7f\u5f97\u5b83\u53ef\u4ee5\u7528\u4e8e\u4e0d\u540c\u7684\u5e94\u7528\u573a\u666f\u3002<\/p>\n<h3>&emsp;&emsp;DMA\u4e32\u53e3\u7684\u5e94\u7528<\/h3>\n<p>&emsp;&emsp;DMA\u4e32\u53e3\u53ef\u4ee5\u7528\u4e8e\u591a\u79cd\u5e94\u7528\uff0c\u5982\u5de5\u4e1a\u81ea\u52a8\u5316\u3001\u667a\u80fd\u5bb6\u5c45\u3001\u667a\u80fd\u4ea4\u901a\u7b49\u3002\u4f8b\u5982\uff0c\u5728\u5de5\u4e1a\u81ea\u52a8\u5316\u9886\u57df\uff0cDMA\u4e32\u53e3\u53ef\u4ee5\u7528\u6765\u4f20\u8f93\u5927\u91cf\u7684\u6570\u636e\uff0c\u5305\u62ec\u4f20\u611f\u5668\u6570\u636e\u3001\u673a\u5668\u4eba\u63a7\u5236\u4fe1\u53f7\u7b49\uff0c\u4ece\u800c\u63d0\u9ad8\u751f\u4ea7\u6548\u7387\u3002\u5728\u667a\u80fd\u5bb6\u5c45\u9886\u57df\uff0cDMA\u4e32\u53e3\u53ef\u4ee5\u7528\u6765\u8fde\u63a5\u667a\u80fd\u5bb6\u5c45\u8bbe\u5907\uff0c\u5b9e\u73b0\u667a\u80fd\u5316\u63a7\u5236\u3002\u5728\u667a\u80fd\u4ea4\u901a\u9886\u57df\uff0cDMA\u4e32\u53e3\u53ef\u4ee5\u7528\u6765\u4f20\u8f93\u8f66\u8f86\u63a7\u5236\u4fe1\u53f7\uff0c\u5b9e\u73b0\u667a\u80fd\u4ea4\u901a\u7ba1\u7406\u3002<\/p>\n<h2 style=\"text-align: center;\">DMA\u4e32\u53e3\u7684\u7f3a\u70b9<\/h2>\n<p>&emsp;&emsp;DMA\u4e32\u53e3\u4e5f\u6709\u4e00\u4e9b\u7f3a\u70b9\uff0c\u4f8b\u5982\u5b89\u5168\u6027\u8f83\u4f4e\u3001\u6570\u636e\u4f20\u8f93\u901f\u5ea6\u8f83\u6162\u7b49\u3002DMA\u4e32\u53e3\u7684\u5b89\u5168\u6027\u8f83\u4f4e\uff0c\u56e0\u4e3a\u5b83\u53ea\u662f\u4e00\u79cd\u76f4\u63a5\u8bbf\u95ee\u5185\u5b58\u7684\u6280\u672f\uff0c\u6240\u4ee5\u5b83\u7684\u6570\u636e\u53ef\u80fd\u4f1a\u88ab\u7be1\u6539\u6216\u4e22\u5931\u3002\u6b64\u5916\uff0cDMA\u4e32\u53e3\u7684\u6570\u636e\u4f20\u8f93\u901f\u5ea6\u4e5f\u8f83\u6162\uff0c\u56e0\u4e3a\u5b83\u53ea\u80fd\u5728\u4e00\u6b21\u4f20\u8f93\u4e2d\u4f20\u8f93\u4e00\u4e2a\u5b57\u8282\u7684\u6570\u636e\u3002<\/p>\n<h2 style=\"text-align: center;\">\u603b\u7ed3<\/h2>\n<p>&emsp;&emsp;<strong>DMA\u4e32\u53e3\u662f\u4e00\u79cd\u53ef\u4ee5\u4ece\u8ba1\u7b97\u673a\u5185\u5b58\u4e2d\u76f4\u63a5\u8bbf\u95ee\u6570\u636e\u7684\u6280\u672f\uff0c\u5b83\u53ef\u4ee5\u8282\u7701\u5927\u91cf\u7684\u65f6\u95f4\uff0c\u4f7f\u5f97\u8ba1\u7b97\u673a\u7cfb\u7edf\u7684\u6027\u80fd\u5927\u5927\u63d0\u9ad8\u3002<\/strong>DMA\u4e32\u53e3\u53ef\u4ee5\u7528\u4e8e\u591a\u79cd\u5e94\u7528\uff0c\u5982\u5de5\u4e1a\u81ea\u52a8\u5316\u3001\u667a\u80fd\u5bb6\u5c45\u3001\u667a\u80fd\u4ea4\u901a\u7b49\uff0c\u4f46\u5b83\u4e5f\u6709\u4e00\u4e9b\u7f3a\u70b9\uff0c\u4f8b\u5982\u5b89\u5168\u6027\u8f83\u4f4e\u3001\u6570\u636e\u4f20\u8f93\u901f\u5ea6\u8f83\u6162\u7b49\u3002<\/p>\n","protected":false},"excerpt":{"rendered":"<p>DMA\uff08DirectMemoryAccess\uff09\u4e32\u53e3\u662f\u4e00\u79cd\u53ef\u4ee5\u4ece\u8ba1\u7b97\u673a\u5185\u5b58\u4e2d\u76f4\u63a5\u8bbf\u95ee\u6570\u636e\u7684\u6280\u672f\u3002\u5b83\u53ef\u4ee5\u8282\u7701\u5927\u91cf\u7684\u65f6\u95f4\uff0c\u4f7f\u5f97\u8ba1\u7b97\u673a\u7cfb\u7edf\u7684\u6027\u80fd\u5927\u5927\u63d0\u9ad8\u3002DMA\u4e32\u53e3\u53ef\u4ee5\u7528\u6765\u53d1<\/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":[69],"class_list":["post-63038","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\/63038","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=63038"}],"version-history":[{"count":0,"href":"https:\/\/www.techphant.cn\/wp-json\/wp\/v2\/posts\/63038\/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=63038"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"https:\/\/www.techphant.cn\/wp-json\/wp\/v2\/categories?post=63038"},{"taxonomy":"post_tag","embeddable":true,"href":"https:\/\/www.techphant.cn\/wp-json\/wp\/v2\/tags?post=63038"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}