{"id":44407,"date":"2023-10-03T17:30:27","date_gmt":"2023-10-03T09:30:27","guid":{"rendered":"\/\/www.dealsbon.com\/?p=44407"},"modified":"2023-10-03T17:30:27","modified_gmt":"2023-10-03T09:30:27","slug":"uhdtscxtxdxjs","status":"publish","type":"post","link":"\/\/www.dealsbon.com\/blog\/44407.html","title":{"rendered":"UART\u548cDMA\uff1a\u63a2\u7d22\u4e32\u884c\u901a\u4fe1\u7684\u65b0\u6280\u672f"},"content":{"rendered":"<p>&emsp;&emsp;\u5728\u6570\u5b57\u5316\u65f6\u4ee3\uff0c\u4e32\u884c\u901a\u4fe1\u6280\u672f\u53d1\u6325\u7740\u8d8a\u6765\u8d8a\u91cd\u8981\u7684\u4f5c\u7528\u3002UART\uff08Universal Asynchronous Receiver\/Transmitter\uff09\u548cDMA\uff08Direct Memory Access\uff09\u662f\u4e24\u79cd\u4e3b\u8981\u7684\u4e32\u884c\u901a\u4fe1\u6280\u672f\uff0c\u5b83\u4eec\u5728\u5fae\u5904\u7406\u5668\u548c\u5fae\u63a7\u5236\u5668\u4e2d\u53d1\u6325\u91cd\u8981\u4f5c\u7528\u3002\u672c\u6587\u5c06\u6df1\u5165\u63a2\u8ba8\u8fd9\u4e24\u79cd\u6280\u672f\uff0c\u4ee5\u4fbf\u8bfb\u8005\u80fd\u591f\u66f4\u597d\u5730\u4e86\u89e3\u5b83\u4eec\u7684\u5de5\u4f5c\u539f\u7406\u548c\u5e94\u7528\u573a\u666f\u3002<\/p>\n<h2 style=\"text-align: center;\">UART\uff1a\u5b9e\u73b0\u4e32\u884c\u901a\u4fe1\u7684\u57fa\u7840<\/h2>\n<p>&emsp;&emsp;UART\u662f\u4e00\u79cd\u5f02\u6b65\u4e32\u884c\u901a\u4fe1\u6280\u672f\uff0c\u5b83\u4f7f\u7528\u4e24\u6761\u7ebf\u8def\uff08\u63a5\u6536\u548c\u53d1\u9001\uff09\u6765\u4f20\u8f93\u6570\u636e\u3002UART\u53ef\u4ee5\u5c06\u6570\u636e\u4ee5\u5b57\u8282\u5f62\u5f0f\u4ece\u4e00\u4e2a\u8bbe\u5907\u4f20\u8f93\u5230\u53e6\u4e00\u4e2a\u8bbe\u5907\u3002UART\u7684\u4f20\u8f93\u901f\u7387\u53ef\u4ee5\u4ece\u51e0\u767e\u6bd4\u7279\u6bcf\u79d2\u5230\u51e0\u5341\u5146\u6bd4\u7279\u6bcf\u79d2\uff0c\u8fd9\u53d6\u51b3\u4e8e\u6240\u4f7f\u7528\u7684\u8bbe\u5907\u3002<\/p>\n<p>&emsp;&emsp;UART\u4f7f\u7528\u8bb8\u591a\u4e0d\u540c\u7684\u534f\u8bae\u6765\u4f20\u8f93\u6570\u636e\uff0c\u5176\u4e2d\u6700\u5e38\u7528\u7684\u662fRS-232\u548cRS-485\u534f\u8bae\u3002RS-232\u534f\u8bae\u4f7f\u7528\u4e00\u5bf9\u6536\u53d1\u7ebf\uff0c\u800cRS-485\u5219\u4f7f\u7528\u591a\u8fbe32\u6761\u6536\u53d1\u7ebf\u3002UART\u53ef\u4ee5\u4f7f\u7528\u5404\u79cd\u4e0d\u540c\u7684\u7f16\u7801\u65b9\u5f0f\uff0c\u59828\u4f4d\u300116\u4f4d\u548c32\u4f4d\uff0c\u4ee5\u53ca\u4e0d\u540c\u7684\u505c\u6b62\u4f4d\u548c\u6821\u9a8c\u4f4d\u3002<\/p>\n<h3>&emsp;&emsp;UART\u7684\u5e94\u7528\u573a\u666f<\/h3>\n<p>&emsp;&emsp;UART\u53ef\u4ee5\u7528\u4e8e\u5b9e\u73b0\u5404\u79cd\u4e0d\u540c\u7684\u5e94\u7528\uff0c\u5982\u5de5\u4e1a\u63a7\u5236\u3001\u81ea\u52a8\u5316\u3001\u667a\u80fd\u5bb6\u5c45\u7cfb\u7edf\u7b49\u3002UART\u53ef\u4ee5\u7528\u4e8e\u5b9e\u73b0\u8fdc\u7a0b\u63a7\u5236\uff0c\u53ef\u4ee5\u7528\u4e8e\u4e0e\u5916\u90e8\u8bbe\u5907\u8fdb\u884c\u901a\u4fe1\uff0c\u4e5f\u53ef\u4ee5\u7528\u4e8e\u5b9e\u73b0\u6570\u636e\u91c7\u96c6\u548c\u4f20\u8f93\u3002UART\u4e5f\u53ef\u4ee5\u7528\u4e8e\u5d4c\u5165\u5f0f\u7cfb\u7edf\uff0c\u5982\u667a\u80fd\u624b\u673a\u3001\u667a\u80fd\u5bb6\u5c45\u3001\u667a\u80fd\u8f66\u8f86\u7b49\u3002<\/p>\n<h2 style=\"text-align: center;\">DMA\uff1a\u5b9e\u73b0\u9ad8\u6548\u6570\u636e\u4f20\u8f93\u7684\u5229\u5668<\/h2>\n<p>&emsp;&emsp;DMA\u662f\u4e00\u79cd\u76f4\u63a5\u5185\u5b58\u8bbf\u95ee\u6280\u672f\uff0c\u5b83\u53ef\u4ee5\u5728\u4e3b\u673a\u548c\u5916\u8bbe\u4e4b\u95f4\u5b9e\u73b0\u9ad8\u6548\u7684\u6570\u636e\u4f20\u8f93\u3002\u5b83\u53ef\u4ee5\u4f7f\u5f97\u4e3b\u673a\u4e0d\u7528\u6bcf\u6b21\u90fd\u4e3b\u52a8\u53bb\u8bbf\u95ee\u5916\u8bbe\uff0c\u800c\u662f\u7531\u5916\u8bbe\u4e3b\u52a8\u5411\u4e3b\u673a\u53d1\u9001\u6570\u636e\u3002DMA\u53ef\u4ee5\u5728\u4e3b\u673a\u548c\u5916\u8bbe\u4e4b\u95f4\u5b9e\u73b0\u9ad8\u901f\u6570\u636e\u4f20\u8f93\uff0c\u800c\u4e14\u53ef\u4ee5\u5c06\u4e3b\u673a\u82af\u7247\u7684\u6027\u80fd\u63d0\u9ad8\u5230\u6781\u9650\u3002<\/p>\n<h3>&emsp;&emsp;DMA\u7684\u5e94\u7528\u573a\u666f<\/h3>\n<p>&emsp;&emsp;DMA\u53ef\u4ee5\u7528\u4e8e\u5b9e\u73b0\u5404\u79cd\u4e0d\u540c\u7684\u5e94\u7528\uff0c\u5982\u786c\u4ef6\u52a0\u901f\u3001\u591a\u5a92\u4f53\u5e94\u7528\u3001\u6e38\u620f\u5f00\u53d1\u7b49\u3002DMA\u53ef\u4ee5\u7528\u4e8e\u5b9e\u73b0\u786c\u4ef6\u52a0\u901f\uff0c\u53ef\u4ee5\u7528\u4e8e\u591a\u5a92\u4f53\u5e94\u7528\uff0c\u5982\u89c6\u9891\u548c\u97f3\u9891\u5904\u7406\uff0c\u4e5f\u53ef\u4ee5\u7528\u4e8e\u6e38\u620f\u5f00\u53d1\uff0c\u5982\u56fe\u5f62\u5904\u7406\u548c\u7f51\u7edc\u901a\u4fe1\u7b49\u3002<\/p>\n<h2 style=\"text-align: center;\">\u603b\u7ed3<\/h2>\n<p>&emsp;&emsp;<strong>UART\u548cDMA\u662f\u4e24\u79cd\u4e3b\u8981\u7684\u4e32\u884c\u901a\u4fe1\u6280\u672f\uff0c\u5b83\u4eec\u53ef\u4ee5\u5b9e\u73b0\u5404\u79cd\u4e0d\u540c\u7684\u5e94\u7528\u3002<\/strong>UART\u53ef\u4ee5\u7528\u4e8e\u5b9e\u73b0\u8fdc\u7a0b\u63a7\u5236\uff0c\u53ef\u4ee5\u7528\u4e8e\u4e0e\u5916\u90e8\u8bbe\u5907\u8fdb\u884c\u901a\u4fe1\uff0c\u4e5f\u53ef\u4ee5\u7528\u4e8e\u5b9e\u73b0\u6570\u636e\u91c7\u96c6\u548c\u4f20\u8f93\u3002DMA\u53ef\u4ee5\u5728\u4e3b\u673a\u548c\u5916\u8bbe\u4e4b\u95f4\u5b9e\u73b0\u9ad8\u901f\u6570\u636e\u4f20\u8f93\uff0c\u53ef\u4ee5\u7528\u4e8e\u5b9e\u73b0\u786c\u4ef6\u52a0\u901f\u3001\u591a\u5a92\u4f53\u5e94\u7528\u3001\u6e38\u620f\u5f00\u53d1\u7b49\u3002UART\u548cDMA\u90fd\u662f\u5b9e\u73b0\u4e32\u884c\u901a\u4fe1\u7684\u91cd\u8981\u6280\u672f\uff0c\u5b83\u4eec\u7684\u5e94\u7528\u8d8a\u6765\u8d8a\u5e7f\u6cdb\uff0c\u4e3a\u6211\u4eec\u7684\u751f\u6d3b\u5e26\u6765\u4e86\u66f4\u591a\u7684\u4fbf\u5229\u3002<\/p>\n","protected":false},"excerpt":{"rendered":"<p>\u5728\u6570\u5b57\u5316\u65f6\u4ee3\uff0c\u4e32\u884c\u901a\u4fe1\u6280\u672f\u53d1\u6325\u7740\u8d8a\u6765\u8d8a\u91cd\u8981\u7684\u4f5c\u7528\u3002UART\uff08UniversalAsynchronousReceiver\/Transmitter\uff09\u548cDMA\uff08Direct<\/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":[145],"class_list":["post-44407","post","type-post","status-publish","format-standard","has-post-thumbnail","hentry","category-blog","tag-uart"],"_links":{"self":[{"href":"\/\/www.dealsbon.com\/wp-json\/wp\/v2\/posts\/44407"}],"collection":[{"href":"\/\/www.dealsbon.com\/wp-json\/wp\/v2\/posts"}],"about":[{"href":"\/\/www.dealsbon.com\/wp-json\/wp\/v2\/types\/post"}],"author":[{"embeddable":true,"href":"\/\/www.dealsbon.com\/wp-json\/wp\/v2\/users\/1"}],"replies":[{"embeddable":true,"href":"\/\/www.dealsbon.com\/wp-json\/wp\/v2\/comments?post=44407"}],"version-history":[{"count":0,"href":"\/\/www.dealsbon.com\/wp-json\/wp\/v2\/posts\/44407\/revisions"}],"wp:featuredmedia":[{"embeddable":true,"href":"\/\/www.dealsbon.com\/wp-json\/wp\/v2\/media\/4132"}],"wp:attachment":[{"href":"\/\/www.dealsbon.com\/wp-json\/wp\/v2\/media?parent=44407"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"\/\/www.dealsbon.com\/wp-json\/wp\/v2\/categories?post=44407"},{"taxonomy":"post_tag","embeddable":true,"href":"\/\/www.dealsbon.com\/wp-json\/wp\/v2\/tags?post=44407"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}