{"id":41463,"date":"2023-10-05T03:36:33","date_gmt":"2023-10-04T19:36:33","guid":{"rendered":"\/\/www.viralrail.com\/?p=41463"},"modified":"2023-10-05T03:36:33","modified_gmt":"2023-10-04T19:36:33","slug":"cyybxcklxhs","status":"publish","type":"post","link":"\/\/www.viralrail.com\/blog\/41463.html","title":{"rendered":"C\u8bed\u8a00\u7f16\u5199\u4e32\u53e3\u8f6e\u8be2\u51fd\u6570"},"content":{"rendered":"

  \u5728\u5f88\u591a\u5e94\u7528\u573a\u666f\u4e2d\uff0c\u4e32\u53e3\u8f6e\u8be2\u51fd\u6570\u662f\u4e00\u4e2a\u975e\u5e38\u91cd\u8981\u7684\u529f\u80fd\uff0c\u5b83\u53ef\u4ee5\u5e2e\u52a9\u6211\u4eec\u5b9e\u73b0\u4e32\u53e3\u6570\u636e\u7684\u53d1\u9001\u548c\u63a5\u6536\u3002\u672c\u6587\u5c06\u4ecb\u7ecd\u5982\u4f55\u4f7f\u7528C\u8bed\u8a00\u7f16\u5199\u4e00\u4e2a\u4e32\u53e3\u8f6e\u8be2\u51fd\u6570\uff0c\u5e76\u4ecb\u7ecd\u5176\u76f8\u5173\u7684\u77e5\u8bc6\u70b9\uff0c\u4ee5\u4fbf\u8bfb\u8005\u80fd\u591f\u66f4\u597d\u5730\u7406\u89e3\u548c\u4f7f\u7528\u4e32\u53e3\u8f6e\u8be2\u51fd\u6570\u3002<\/p>\n

\u4ec0\u4e48\u662f\u4e32\u53e3\u8f6e\u8be2\u51fd\u6570<\/h2>\n

  \u4e32\u53e3\u8f6e\u8be2\u51fd\u6570\u662f\u4e00\u79cd\u5e38\u7528\u7684\u4e32\u53e3\u901a\u4fe1\u51fd\u6570\uff0c\u5b83\u53ef\u4ee5\u5b9e\u73b0\u4e32\u53e3\u6570\u636e\u7684\u53d1\u9001\u548c\u63a5\u6536\u3002\u4e32\u53e3\u8f6e\u8be2\u51fd\u6570\u7684\u5de5\u4f5c\u539f\u7406\u662f\uff1a\u5b83\u4f1a\u4e0d\u65ad\u68c0\u67e5\u4e32\u53e3\u72b6\u6001\uff0c\u5982\u679c\u53d1\u73b0\u4e32\u53e3\u6709\u6570\u636e\u53ef\u4ee5\u63a5\u6536\uff0c\u5219\u4f1a\u63a5\u6536\uff0c\u5982\u679c\u53d1\u73b0\u4e32\u53e3\u53ef\u4ee5\u53d1\u9001\u6570\u636e\uff0c\u5219\u4f1a\u53d1\u9001\u6570\u636e\u3002<\/p>\n

\u5982\u4f55\u4f7f\u7528C\u8bed\u8a00\u7f16\u5199\u4e32\u53e3\u8f6e\u8be2\u51fd\u6570<\/h2>\n

  1. \u5b9a\u4e49\u4e32\u53e3\u8f6e\u8be2\u51fd\u6570<\/h3>\n

  \u9996\u5148\u6211\u4eec\u9700\u8981\u5b9a\u4e49\u4e00\u4e2a\u4e32\u53e3\u8f6e\u8be2\u51fd\u6570\uff0c\u5b83\u7684\u5b9a\u4e49\u5982\u4e0b\uff1a<\/p>\n

int SerialPoll(int fd, char *data, int len)
  {<\/p>
   \/\/ \u4e32\u53e3\u8f6e\u8be2\u51fd\u6570<\/p> }<\/pre>\n
  \u53c2\u6570fd\u4e3a\u4e32\u53e3\u6587\u4ef6\u63cf\u8ff0\u7b26\uff1b\u53c2\u6570data\u4e3a\u4e32\u53e3\u6536\u53d1\u7684\u7f13\u51b2\u533a\uff1b\u53c2\u6570len\u4e3adata\u7684\u957f\u5ea6\u3002<\/p>\n
  2. \u521d\u59cb\u5316\u4e32\u53e3<\/h3>\n
  \u5728\u4f7f\u7528\u4e32\u53e3\u8f6e\u8be2\u51fd\u6570\u4e4b\u524d\uff0c\u6211\u4eec\u9700\u8981\u5148\u521d\u59cb\u5316\u4e32\u53e3\uff0c\u4ee5\u786e\u4fdd\u4e32\u53e3\u80fd\u591f\u6b63\u5e38\u5de5\u4f5c\u3002<\/p>\n
  \u521d\u59cb\u5316\u4e32\u53e3\u7684\u6b65\u9aa4\u5982\u4e0b\uff1a<\/p>\n
  2.1 \u6253\u5f00\u4e32\u53e3<\/strong><\/p>\n
  \u4f7f\u7528open\u51fd\u6570\u6253\u5f00\u4e32\u53e3\uff0c\u53c2\u6570\u4e3a\u4e32\u53e3\u8bbe\u5907\u6587\u4ef6\u8def\u5f84\uff0c\u5982\/dev\/ttyS0\u3002<\/p>\n
  2.2 \u8bbe\u7f6e\u4e32\u53e3\u53c2\u6570<\/strong><\/p>\n
  \u4f7f\u7528tcsetattr\u51fd\u6570\u8bbe\u7f6e\u4e32\u53e3\u53c2\u6570\uff0c\u53c2\u6570\u5305\u62ec\u6ce2\u7279\u7387\u3001\u6570\u636e\u4f4d\u3001\u505c\u6b62\u4f4d\u3001\u6821\u9a8c\u4f4d\u7b49\u3002<\/p>\n
  3. \u5b9e\u73b0\u4e32\u53e3\u8f6e\u8be2\u51fd\u6570<\/h3>\n
  \u5b9e\u73b0\u4e32\u53e3\u8f6e\u8be2\u51fd\u6570\u7684\u6b65\u9aa4\u5982\u4e0b\uff1a<\/p>\n
  3.1 \u68c0\u67e5\u4e32\u53e3\u72b6\u6001<\/strong><\/p>\n
  \u4f7f\u7528ioctl\u51fd\u6570\u68c0\u67e5\u4e32\u53e3\u72b6\u6001\uff0c\u5982\u679c\u53d1\u73b0\u4e32\u53e3\u6709\u6570\u636e\u53ef\u4ee5\u63a5\u6536\uff0c\u5219\u8fdb\u5165\u4e0b\u4e00\u6b65\uff1b\u5982\u679c\u53d1\u73b0\u4e32\u53e3\u6ca1\u6709\u6570\u636e\u53ef\u4ee5\u63a5\u6536\uff0c\u5219\u8fd4\u56de\u3002<\/p>\n
  3.2 \u63a5\u6536\u6570\u636e<\/strong><\/p>\n
  \u4f7f\u7528read\u51fd\u6570\u4ece\u4e32\u53e3\u63a5\u6536\u6570\u636e\uff0c\u5c06\u63a5\u6536\u5230\u7684\u6570\u636e\u5b58\u5165data\u7f13\u51b2\u533a\u3002<\/p>\n
  3.3 \u68c0\u67e5\u4e32\u53e3\u72b6\u6001<\/strong><\/p>\n
  \u4f7f\u7528ioctl\u51fd\u6570\u68c0\u67e5\u4e32\u53e3\u72b6\u6001\uff0c\u5982\u679c\u53d1\u73b0\u4e32\u53e3\u53ef\u4ee5\u53d1\u9001\u6570\u636e\uff0c\u5219\u8fdb\u5165\u4e0b\u4e00\u6b65\uff1b\u5982\u679c\u53d1\u73b0\u4e32\u53e3\u6ca1\u6709\u53ef\u4ee5\u53d1\u9001\u7684\u6570\u636e\uff0c\u5219\u8fd4\u56de\u3002<\/p>\n
  3.4 \u53d1\u9001\u6570\u636e<\/strong><\/p>\n
  \u4f7f\u7528write\u51fd\u6570\u5411\u4e32\u53e3\u53d1\u9001\u6570\u636e\uff0c\u5c06data\u7f13\u51b2\u533a\u4e2d\u7684\u6570\u636e\u53d1\u9001\u51fa\u53bb\u3002<\/p>\n
\u603b\u7ed3<\/h2>\n
  \u672c\u6587\u4ecb\u7ecd\u4e86\u5982\u4f55\u4f7f\u7528C\u8bed\u8a00\u7f16\u5199\u4e00\u4e2a\u4e32\u53e3\u8f6e\u8be2\u51fd\u6570\uff0c\u4ee5\u53ca\u4e32\u53e3\u8f6e\u8be2\u51fd\u6570\u7684\u5de5\u4f5c\u539f\u7406\u3002<\/strong>\u4e32\u53e3\u8f6e\u8be2\u51fd\u6570\u7684\u5b9e\u73b0\u9700\u8981\u5148\u521d\u59cb\u5316\u4e32\u53e3\uff0c\u7136\u540e\u4e0d\u65ad\u68c0\u67e5\u4e32\u53e3\u72b6\u6001\uff0c\u5b9e\u73b0\u6570\u636e\u7684\u53d1\u9001\u548c\u63a5\u6536\u3002<\/p>\n","protected":false},"excerpt":{"rendered":"
\u5728\u5f88\u591a\u5e94\u7528\u573a\u666f\u4e2d\uff0c\u4e32\u53e3\u8f6e\u8be2\u51fd\u6570\u662f\u4e00\u4e2a\u975e\u5e38\u91cd\u8981\u7684\u529f\u80fd\uff0c\u5b83\u53ef\u4ee5\u5e2e\u52a9\u6211\u4eec\u5b9e\u73b0\u4e32\u53e3\u6570\u636e\u7684\u53d1\u9001\u548c\u63a5\u6536\u3002\u672c\u6587\u5c06\u4ecb\u7ecd\u5982\u4f55\u4f7f\u7528C\u8bed\u8a00\u7f16\u5199\u4e00\u4e2a\u4e32\u53e3\u8f6e\u8be2\u51fd\u6570\uff0c\u5e76\u4ecb\u7ecd\u5176\u76f8\u5173\u7684\u77e5\u8bc6\u70b9\uff0c\u4ee5\u4fbf\u8bfb\u8005\u80fd<\/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-41463","post","type-post","status-publish","format-standard","has-post-thumbnail","hentry","category-blog","tag-cktx"],"_links":{"self":[{"href":"\/\/www.viralrail.com\/wp-json\/wp\/v2\/posts\/41463"}],"collection":[{"href":"\/\/www.viralrail.com\/wp-json\/wp\/v2\/posts"}],"about":[{"href":"\/\/www.viralrail.com\/wp-json\/wp\/v2\/types\/post"}],"author":[{"embeddable":true,"href":"\/\/www.viralrail.com\/wp-json\/wp\/v2\/users\/1"}],"replies":[{"embeddable":true,"href":"\/\/www.viralrail.com\/wp-json\/wp\/v2\/comments?post=41463"}],"version-history":[{"count":0,"href":"\/\/www.viralrail.com\/wp-json\/wp\/v2\/posts\/41463\/revisions"}],"wp:featuredmedia":[{"embeddable":true,"href":"\/\/www.viralrail.com\/wp-json\/wp\/v2\/media\/4132"}],"wp:attachment":[{"href":"\/\/www.viralrail.com\/wp-json\/wp\/v2\/media?parent=41463"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"\/\/www.viralrail.com\/wp-json\/wp\/v2\/categories?post=41463"},{"taxonomy":"post_tag","embeddable":true,"href":"\/\/www.viralrail.com\/wp-json\/wp\/v2\/tags?post=41463"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}