{"id":46600,"date":"2023-10-01T15:05:05","date_gmt":"2023-10-01T07:05:05","guid":{"rendered":"https:\/\/www.techphant.cn\/?p=46600"},"modified":"2023-10-01T15:05:05","modified_gmt":"2023-10-01T07:05:05","slug":"sdpjddjs","status":"publish","type":"post","link":"https:\/\/www.techphant.cn\/blog\/46600.html","title":{"rendered":"STC8A\u5355\u7247\u673a\u7684DMA\u6280\u672f"},"content":{"rendered":"<p>&emsp;&emsp;DMA\uff08Direct Memory Access\uff09\u662f\u4e00\u79cd\u4f7f\u5f97\u5916\u56f4\u8bbe\u5907\u548c\u5185\u5b58\u4e4b\u95f4\u7684\u6570\u636e\u4f20\u8f93\u53ef\u4ee5\u5b8c\u5168\u4e0d\u53d7CPU\u63a7\u5236\u7684\u6280\u672f\u3002STC8A\u5355\u7247\u673a\u7684DMA\u6280\u672f\u53ef\u4ee5\u63d0\u9ad8\u5355\u7247\u673a\u7684\u5904\u7406\u6548\u7387\uff0c\u51cf\u5c11CPU\u7684\u8d1f\u62c5\uff0c\u4ece\u800c\u63d0\u9ad8\u7cfb\u7edf\u7684\u6027\u80fd\u3002\u672c\u6587\u5c06\u4ecb\u7ecdSTC8A\u5355\u7247\u673a\u7684DMA\u6280\u672f\uff0c\u5305\u62ec\u5b83\u7684\u7279\u70b9\u3001\u4f18\u70b9\u4ee5\u53ca\u5982\u4f55\u4f7f\u7528\u3002<\/p>\n<h2 style=\"text-align: center;\">DMA\u7684\u7279\u70b9<\/h2>\n<p>&emsp;&emsp;STC8A\u5355\u7247\u673a\u7684DMA\u6280\u672f\u5177\u6709\u4ee5\u4e0b\u7279\u70b9\uff1a<\/p>\n<ul>\n<li>\u53ef\u4ee5\u5b9e\u73b0\u5916\u56f4\u8bbe\u5907\u548c\u5185\u5b58\u4e4b\u95f4\u7684\u6570\u636e\u4f20\u8f93\uff0c\u4e0d\u53d7CPU\u63a7\u5236\uff1b<\/li>\n<li>\u53ef\u4ee5\u5b9e\u73b0\u591a\u4e2a\u8bbe\u5907\u4e4b\u95f4\u7684\u6570\u636e\u4f20\u8f93\uff1b<\/li>\n<li>\u53ef\u4ee5\u5b9e\u73b0\u6570\u636e\u4f20\u8f93\u7684\u65b9\u5411\uff0c\u652f\u6301\u53cc\u5411\u4f20\u8f93\uff1b<\/li>\n<li>\u53ef\u4ee5\u652f\u6301\u591a\u79cd\u6570\u636e\u683c\u5f0f\uff0c\u652f\u6301\u591a\u79cd\u5b57\u8282\u957f\u5ea6\uff1b<\/li>\n<li>\u53ef\u4ee5\u652f\u6301\u591a\u79cd\u4f20\u8f93\u6a21\u5f0f\uff0c\u652f\u6301\u5355\u6b21\u4f20\u8f93\u548c\u5faa\u73af\u4f20\u8f93\uff1b<\/li>\n<li>\u53ef\u4ee5\u5b9e\u73b0\u5feb\u901f\u6570\u636e\u4f20\u8f93\uff0c\u6700\u9ad8\u53ef\u8fbe\u52303.2MB\/s\u7684\u4f20\u8f93\u901f\u5ea6\u3002<\/li>\n<\/ul>\n<h2 style=\"text-align: center;\">DMA\u7684\u4f18\u70b9<\/h2>\n<p>&emsp;&emsp;STC8A\u5355\u7247\u673a\u7684DMA\u6280\u672f\u5177\u6709\u4ee5\u4e0b\u4f18\u70b9\uff1a<\/p>\n<ul>\n<li>\u53ef\u4ee5\u5927\u5927\u51cf\u5c11CPU\u7684\u8d1f\u62c5\uff0c\u63d0\u9ad8CPU\u7684\u5904\u7406\u6548\u7387\uff1b<\/li>\n<li>\u53ef\u4ee5\u63d0\u9ad8\u7cfb\u7edf\u7684\u6027\u80fd\uff0c\u63d0\u9ad8\u7cfb\u7edf\u7684\u6574\u4f53\u6548\u7387\uff1b<\/li>\n<li>\u53ef\u4ee5\u652f\u6301\u591a\u79cd\u6570\u636e\u683c\u5f0f\uff0c\u6ee1\u8db3\u4e0d\u540c\u9700\u6c42\uff1b<\/li>\n<li>\u53ef\u4ee5\u652f\u6301\u591a\u79cd\u4f20\u8f93\u6a21\u5f0f\uff0c\u6ee1\u8db3\u4e0d\u540c\u9700\u6c42\uff1b<\/li>\n<li>\u53ef\u4ee5\u5b9e\u73b0\u5feb\u901f\u6570\u636e\u4f20\u8f93\uff0c\u63d0\u9ad8\u7cfb\u7edf\u7684\u6574\u4f53\u6548\u7387\u3002<\/li>\n<\/ul>\n<h2 style=\"text-align: center;\">\u5982\u4f55\u4f7f\u7528DMA<\/h2>\n<h3>&emsp;&emsp;\u786c\u4ef6\u51c6\u5907<\/h3>\n<p>&emsp;&emsp;\u9996\u5148\uff0c\u6211\u4eec\u9700\u8981\u51c6\u5907\u597dSTC8A\u5355\u7247\u673a\uff0c\u4ee5\u53ca\u4e0e\u4e4b\u76f8\u8fde\u63a5\u7684\u5916\u56f4\u8bbe\u5907\uff0c\u4ee5\u53ca\u4e0e\u4e4b\u76f8\u8fde\u63a5\u7684\u5185\u5b58\u3002<\/p>\n<h3>&emsp;&emsp;\u8f6f\u4ef6\u51c6\u5907<\/h3>\n<p>&emsp;&emsp;\u5176\u6b21\uff0c\u6211\u4eec\u9700\u8981\u51c6\u5907\u597dSTC8A\u5355\u7247\u673a\u7684DMA\u9a71\u52a8\u7a0b\u5e8f\uff0c\u4ee5\u53caDMA\u63a7\u5236\u7a0b\u5e8f\u3002<\/p>\n<h3>&emsp;&emsp;\u8bbe\u7f6eDMA\u53c2\u6570<\/h3>\n<p>&emsp;&emsp;\u7136\u540e\uff0c\u6211\u4eec\u9700\u8981\u8bbe\u7f6eDMA\u7684\u53c2\u6570\uff0c\u5305\u62ec\u4f20\u8f93\u6a21\u5f0f\u3001\u6570\u636e\u683c\u5f0f\u3001\u5b57\u8282\u957f\u5ea6\u7b49\u3002<\/p>\n<h3>&emsp;&emsp;\u542f\u52a8DMA\u4f20\u8f93<\/h3>\n<p>&emsp;&emsp;\u6700\u540e\uff0c\u6211\u4eec\u9700\u8981\u542f\u52a8DMA\u4f20\u8f93\uff0c\u5b8c\u6210\u5916\u56f4\u8bbe\u5907\u548c\u5185\u5b58\u4e4b\u95f4\u7684\u6570\u636e\u4f20\u8f93\u3002<\/p>\n<h2 style=\"text-align: center;\">\u603b\u7ed3<\/h2>\n<p>&emsp;&emsp;<strong>\u672c\u6587\u4ecb\u7ecd\u4e86STC8A\u5355\u7247\u673a\u7684DMA\u6280\u672f\uff0c\u5305\u62ec\u5b83\u7684\u7279\u70b9\u3001\u4f18\u70b9\u4ee5\u53ca\u5982\u4f55\u4f7f\u7528\u3002<\/strong>DMA\u6280\u672f\u53ef\u4ee5\u5927\u5927\u51cf\u5c11CPU\u7684\u8d1f\u62c5\uff0c\u63d0\u9ad8\u7cfb\u7edf\u7684\u6027\u80fd\uff0c\u63d0\u9ad8\u7cfb\u7edf\u7684\u6574\u4f53\u6548\u7387\uff0c\u662f\u4e00\u79cd\u975e\u5e38\u6709\u7528\u7684\u6280\u672f\u3002<\/p>\n","protected":false},"excerpt":{"rendered":"<p>DMA\uff08DirectMemoryAccess\uff09\u662f\u4e00\u79cd\u4f7f\u5f97\u5916\u56f4\u8bbe\u5907\u548c\u5185\u5b58\u4e4b\u95f4\u7684\u6570\u636e\u4f20\u8f93\u53ef\u4ee5\u5b8c\u5168\u4e0d\u53d7CPU\u63a7\u5236\u7684\u6280\u672f\u3002STC8A\u5355\u7247\u673a\u7684DMA\u6280\u672f\u53ef\u4ee5\u63d0\u9ad8\u5355\u7247\u673a\u7684\u5904\u7406\u6548\u7387<\/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":[83],"class_list":["post-46600","post","type-post","status-publish","format-standard","has-post-thumbnail","hentry","category-blog","tag-dpj"],"_links":{"self":[{"href":"https:\/\/www.techphant.cn\/wp-json\/wp\/v2\/posts\/46600","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=46600"}],"version-history":[{"count":0,"href":"https:\/\/www.techphant.cn\/wp-json\/wp\/v2\/posts\/46600\/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=46600"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"https:\/\/www.techphant.cn\/wp-json\/wp\/v2\/categories?post=46600"},{"taxonomy":"post_tag","embeddable":true,"href":"https:\/\/www.techphant.cn\/wp-json\/wp\/v2\/tags?post=46600"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}