{"id":61856,"date":"2023-11-02T05:17:19","date_gmt":"2023-11-01T21:17:19","guid":{"rendered":"https:\/\/www.techphant.cn\/?p=61856"},"modified":"2023-11-02T05:17:19","modified_gmt":"2023-11-01T21:17:19","slug":"dsxm","status":"publish","type":"post","link":"https:\/\/www.techphant.cn\/blog\/61856.html","title":{"rendered":"DMA\u5b9e\u73b0Modbus"},"content":{"rendered":"

  DMA\uff08Direct Memory Access\uff09\u662f\u4e00\u79cd\u8ba1\u7b97\u673a\u5b58\u50a8\u5668\u6280\u672f\uff0c\u5b83\u5141\u8bb8\u5916\u90e8\u8bbe\u5907\u76f4\u63a5\u8bbf\u95ee\u4e3b\u673a\u5185\u5b58\uff0c\u800c\u4e0d\u9700\u8981CPU\u7684\u53c2\u4e0e\u3002\u5b83\u7684\u7528\u5904\u5728\u4e8e\uff0c\u53ef\u4ee5\u6781\u5927\u5730\u63d0\u9ad8\u7cfb\u7edf\u6027\u80fd\uff0c\u51cf\u5c11CPU\u7684\u8d1f\u62c5\u3002Modbus\u662f\u4e00\u79cd\u5de5\u4e1a\u63a7\u5236\u7cfb\u7edf\u901a\u4fe1\u534f\u8bae\uff0c\u53ef\u4ee5\u5b9e\u73b0\u591a\u79cd\u8bbe\u5907\u4e4b\u95f4\u7684\u901a\u4fe1\u3002\u672c\u6587\u5c06\u4ecb\u7ecd\u5982\u4f55\u4f7f\u7528DMA\u5b9e\u73b0Modbus\u3002<\/p>\n

\u4ec0\u4e48\u662fModbus\uff1f<\/h2>\n

  Modbus\u662f\u4e00\u79cd\u4e32\u884c\u901a\u4fe1\u534f\u8bae\uff0c\u7531Modicon\u516c\u53f8\u4e8e1979\u5e74\u5f00\u53d1\uff0c\u7528\u4e8e\u8fde\u63a5\u5de5\u4e1a\u63a7\u5236\u7cfb\u7edf\u7684\u591a\u79cd\u8bbe\u5907\u3002\u5b83\u53ef\u4ee5\u5b9e\u73b0\u591a\u79cd\u8bbe\u5907\u4e4b\u95f4\u7684\u901a\u4fe1\uff0c\u5e76\u5141\u8bb8\u591a\u4e2a\u8bbe\u5907\u5171\u4eab\u4fe1\u606f\u3002Modbus\u534f\u8bae\u4f7f\u7528TCP\/IP\u6216RS-485\u7b49\u4f20\u8f93\u4ecb\u8d28\uff0c\u53ef\u4ee5\u5b9e\u73b0\u8de8\u8d8a\u4e0d\u540c\u7f51\u7edc\u7684\u901a\u4fe1\u3002<\/p>\n

DMA\u5b9e\u73b0Modbus<\/h2>\n

  DMA\u6280\u672f\u7684\u4f18\u52bf<\/h3>\n

  DMA\u6280\u672f\u7684\u4f18\u52bf\u5728\u4e8e\uff0c\u5b83\u53ef\u4ee5\u51cf\u5c11CPU\u7684\u8d1f\u62c5\uff0c\u6781\u5927\u5730\u63d0\u9ad8\u7cfb\u7edf\u6027\u80fd\u3002\u901a\u8fc7DMA\u6280\u672f\uff0c\u53ef\u4ee5\u5b9e\u73b0\u5916\u90e8\u8bbe\u5907\u548c\u4e3b\u673a\u5185\u5b58\u4e4b\u95f4\u7684\u76f4\u63a5\u6570\u636e\u4f20\u8f93\uff0c\u800c\u65e0\u9700CPU\u7684\u53c2\u4e0e\u3002\u6b64\u5916\uff0cDMA\u6280\u672f\u8fd8\u53ef\u4ee5\u63d0\u9ad8\u7cfb\u7edf\u7684\u53ef\u9760\u6027\uff0c\u56e0\u4e3a\u5b83\u53ef\u4ee5\u51cf\u5c11CPU\u7684\u5de5\u4f5c\u91cf\uff0c\u4ece\u800c\u51cf\u5c11\u51fa\u9519\u7684\u53ef\u80fd\u6027\u3002<\/p>\n

  \u5b9e\u73b0Modbus\u7684\u6b65\u9aa4<\/h3>\n

  \u8981\u5b9e\u73b0Modbus\uff0c\u9996\u5148\u9700\u8981\u786e\u5b9aModbus\u7684\u6570\u636e\u4f20\u8f93\u4ecb\u8d28\uff0c\u53ef\u4ee5\u4f7f\u7528TCP\/IP\u6216RS-485\u7b49\u4f20\u8f93\u4ecb\u8d28\u3002\u7136\u540e\uff0c\u9700\u8981\u5728\u5916\u90e8\u8bbe\u5907\u548c\u4e3b\u673a\u4e4b\u95f4\u5efa\u7acb\u8fde\u63a5\uff0c\u5e76\u5efa\u7acbDMA\u4f20\u8f93\u901a\u9053\uff0c\u4ee5\u5b9e\u73b0\u6570\u636e\u7684\u4f20\u8f93\u3002\u6700\u540e\uff0c\u9700\u8981\u7f16\u5199\u76f8\u5e94\u7684Modbus\u534f\u8bae\uff0c\u4ee5\u5b9e\u73b0\u591a\u8bbe\u5907\u4e4b\u95f4\u7684\u901a\u4fe1\u3002<\/p>\n

\u603b\u7ed3<\/h2>\n

  \u672c\u6587\u4ecb\u7ecd\u4e86\u4f7f\u7528DMA\u5b9e\u73b0Modbus\u7684\u65b9\u6cd5\u3002<\/strong>DMA\u6280\u672f\u7684\u4f18\u52bf\u5728\u4e8e\uff0c\u53ef\u4ee5\u51cf\u5c11CPU\u7684\u8d1f\u62c5\uff0c\u6781\u5927\u5730\u63d0\u9ad8\u7cfb\u7edf\u6027\u80fd\u3002\u8981\u5b9e\u73b0Modbus\uff0c\u9700\u8981\u786e\u5b9aModbus\u7684\u6570\u636e\u4f20\u8f93\u4ecb\u8d28\uff0c\u5efa\u7acb\u5916\u90e8\u8bbe\u5907\u548c\u4e3b\u673a\u4e4b\u95f4\u7684\u8fde\u63a5\uff0c\u5e76\u5efa\u7acbDMA\u4f20\u8f93\u901a\u9053\uff0c\u6700\u540e\u7f16\u5199Modbus\u534f\u8bae\u3002<\/p>\n","protected":false},"excerpt":{"rendered":"

DMA\uff08DirectMemoryAccess\uff09\u662f\u4e00\u79cd\u8ba1\u7b97\u673a\u5b58\u50a8\u5668\u6280\u672f\uff0c\u5b83\u5141\u8bb8\u5916\u90e8\u8bbe\u5907\u76f4\u63a5\u8bbf\u95ee\u4e3b\u673a\u5185\u5b58\uff0c\u800c\u4e0d\u9700\u8981CPU\u7684\u53c2\u4e0e\u3002\u5b83\u7684\u7528\u5904\u5728\u4e8e\uff0c\u53ef\u4ee5\u6781\u5927\u5730\u63d0\u9ad8\u7cfb\u7edf\u6027\u80fd\uff0c\u51cf\u5c11<\/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":[78],"class_list":["post-61856","post","type-post","status-publish","format-standard","has-post-thumbnail","hentry","category-blog","tag-m-3"],"_links":{"self":[{"href":"https:\/\/www.techphant.cn\/wp-json\/wp\/v2\/posts\/61856","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=61856"}],"version-history":[{"count":0,"href":"https:\/\/www.techphant.cn\/wp-json\/wp\/v2\/posts\/61856\/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=61856"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"https:\/\/www.techphant.cn\/wp-json\/wp\/v2\/categories?post=61856"},{"taxonomy":"post_tag","embeddable":true,"href":"https:\/\/www.techphant.cn\/wp-json\/wp\/v2\/tags?post=61856"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}