{"id":92677,"date":"2024-03-21T15:35:11","date_gmt":"2024-03-21T06:35:11","guid":{"rendered":"https:\/\/www.silicloud.com\/ja\/blog\/c%e8%a8%80%e8%aa%9e%e3%81%a7%e3%82%b7%e3%83%aa%e3%82%a2%e3%83%ab%e3%83%9d%e3%83%bc%e3%83%88%e3%83%87%e3%83%bc%e3%82%bf%e3%82%92%e3%81%a9%e3%81%ae%e3%82%88%e3%81%86%e3%81%ab%e8%aa%ad%e3%81%bf%e8%be%bc\/"},"modified":"2024-03-28T08:55:53","modified_gmt":"2024-03-27T23:55:53","slug":"c%e8%a8%80%e8%aa%9e%e3%81%a7%e3%82%b7%e3%83%aa%e3%82%a2%e3%83%ab%e3%83%9d%e3%83%bc%e3%83%88%e3%83%87%e3%83%bc%e3%82%bf%e3%82%92%e3%81%a9%e3%81%ae%e3%82%88%e3%81%86%e3%81%ab%e8%aa%ad%e3%81%bf%e8%be%bc","status":"publish","type":"post","link":"https:\/\/www.silicloud.com\/ja\/blog\/c%e8%a8%80%e8%aa%9e%e3%81%a7%e3%82%b7%e3%83%aa%e3%82%a2%e3%83%ab%e3%83%9d%e3%83%bc%e3%83%88%e3%83%87%e3%83%bc%e3%82%bf%e3%82%92%e3%81%a9%e3%81%ae%e3%82%88%e3%81%86%e3%81%ab%e8%aa%ad%e3%81%bf%e8%be%bc\/","title":{"rendered":"C\u8a00\u8a9e\u3067\u30b7\u30ea\u30a2\u30eb\u30dd\u30fc\u30c8\u30c7\u30fc\u30bf\u3092\u3069\u306e\u3088\u3046\u306b\u8aad\u307f\u8fbc\u3080\u304b"},"content":{"rendered":"<p>\u30b7\u30ea\u30a2\u30eb\u30dd\u30fc\u30c8\u30c7\u30fc\u30bf\u3092C\u8a00\u8a9e\u3067\u8aad\u307f\u53d6\u308b\u306b\u306f\u3001\u6b21\u306e\u624b\u9806\u306b\u5f93\u3044\u307e\u3059\u3002<\/p>\n<ol>\n<li>\u30d8\u30c3\u30c0\u30fc\u30d5\u30a1\u30a4\u30eb\u306e\u30a4\u30f3\u30af\u30eb\u30fc\u30c9<\/li>\n<\/ol>\n<pre class=\"post-pre\"><code><span class=\"hljs-meta\">#<span class=\"hljs-keyword\">include<\/span> <span class=\"hljs-string\">&lt;stdio.h&gt;<\/span><\/span>\r\n<span class=\"hljs-meta\">#<span class=\"hljs-keyword\">include<\/span> <span class=\"hljs-string\">&lt;stdlib.h&gt;<\/span><\/span>\r\n<span class=\"hljs-meta\">#<span class=\"hljs-keyword\">include<\/span> <span class=\"hljs-string\">&lt;fcntl.h&gt;<\/span><\/span>\r\n<span class=\"hljs-meta\">#<span class=\"hljs-keyword\">include<\/span> <span class=\"hljs-string\">&lt;unistd.h&gt;<\/span><\/span>\r\n<span class=\"hljs-meta\">#<span class=\"hljs-keyword\">include<\/span> <span class=\"hljs-string\">&lt;termios.h&gt;<\/span><\/span>\r\n<\/code><\/pre>\n<ol>\n<li>\u30b7\u30ea\u30a2\u30eb\u30dd\u30fc\u30c8\u3092\u958b\u304f<\/li>\n<\/ol>\n<pre class=\"post-pre\"><code><span class=\"hljs-type\">int<\/span> serial_fd = open(<span class=\"hljs-string\">\"\/dev\/ttyS0\"<\/span>, O_RDWR);\r\n<span class=\"hljs-keyword\">if<\/span> (serial_fd == <span class=\"hljs-number\">-1<\/span>) {\r\n    perror(<span class=\"hljs-string\">\"\u65e0\u6cd5\u6253\u5f00\u4e32\u53e3\"<\/span>);\r\n    <span class=\"hljs-built_in\">exit<\/span>(<span class=\"hljs-number\">1<\/span>);\r\n}\r\n<\/code><\/pre>\n<p>\u3053\u3053\u3067\u306f\u3001\/dev\/ttyS0\u304c\u30b7\u30ea\u30a2\u30eb\u30c7\u30d0\u30a4\u30b9\u306e\u30d1\u30b9\u3067\u3001Linux\u30b7\u30b9\u30c6\u30e0\u3067\u306f\u901a\u5e38\u3001\/dev\/ttyS0\u307e\u305f\u306f\/dev\/ttyUSB0\u3067\u3059\u3002\u5b9f\u969b\u7684\u60c5\u6cc1\u306b\u5fdc\u3058\u3066\u5909\u66f4\u3059\u308b\u5fc5\u8981\u304c\u3042\u308a\u307e\u3059\u3002<\/p>\n<ol>\n<li>\u30b7\u30ea\u30a2\u30eb\u30dd\u30fc\u30c8\u3092\u8a2d\u5b9a\u3059\u308b<\/li>\n<\/ol>\n<pre class=\"post-pre\"><code><span class=\"hljs-class\"><span class=\"hljs-keyword\">struct<\/span> <span class=\"hljs-title\">termios<\/span> <span class=\"hljs-title\">options<\/span>;<\/span>\r\ntcgetattr(serial_fd, &amp;options);\r\ncfsetispeed(&amp;options, B9600);  <span class=\"hljs-comment\">\/\/ \u8bbe\u7f6e\u6ce2\u7279\u7387\u4e3a9600<\/span>\r\ncfsetospeed(&amp;options, B9600);\r\noptions.c_cflag |= (CLOCAL | CREAD);  <span class=\"hljs-comment\">\/\/ \u542f\u7528\u63a5\u6536\u548c\u672c\u5730\u6a21\u5f0f<\/span>\r\noptions.c_cflag &amp;= ~PARENB;  <span class=\"hljs-comment\">\/\/ \u65e0\u6821\u9a8c\u4f4d<\/span>\r\noptions.c_cflag &amp;= ~CSTOPB;  <span class=\"hljs-comment\">\/\/ 1\u4e2a\u505c\u6b62\u4f4d<\/span>\r\noptions.c_cflag &amp;= ~CSIZE;  <span class=\"hljs-comment\">\/\/ \u6570\u636e\u4f4d\u63a9\u7801<\/span>\r\noptions.c_cflag |= CS8;  <span class=\"hljs-comment\">\/\/ 8\u4e2a\u6570\u636e\u4f4d<\/span>\r\ntcsetattr(serial_fd, TCSANOW, &amp;options);\r\n<\/code><\/pre>\n<p>\u3053\u306e\u8a2d\u5b9a\u306f\u3001\u30dc\u30fc\u30ec\u30fc\u30c8 9600\u3001\u30d1\u30ea\u30c6\u30a3\u306a\u3057\u3001\u30b9\u30c8\u30c3\u30d7\u30d3\u30c3\u30c8 1\u3001\u30c7\u30fc\u30bf\u30d3\u30c3\u30c8 8 \u3067\u8a2d\u5b9a\u3055\u308c\u3066\u3044\u307e\u3059\u3002\u5fc5\u8981\u306b\u5fdc\u3058\u3066\u8a2d\u5b9a\u3092\u5909\u66f4\u3057\u3066\u304f\u3060\u3055\u3044\u3002<\/p>\n<ol>\n<li>\u30c7\u30fc\u30bf\u306e\u53d6\u5f97<\/li>\n<\/ol>\n<pre class=\"post-pre\"><code><span class=\"hljs-type\">char<\/span> buffer[<span class=\"hljs-number\">255<\/span>];\r\n<span class=\"hljs-type\">int<\/span> length = read(serial_fd, buffer, <span class=\"hljs-keyword\">sizeof<\/span>(buffer));\r\n<span class=\"hljs-keyword\">if<\/span> (length &gt; <span class=\"hljs-number\">0<\/span>) {\r\n    <span class=\"hljs-built_in\">printf<\/span>(<span class=\"hljs-string\">\"\u8bfb\u53d6\u5230\u4e86%d\u4e2a\u5b57\u8282\u7684\u6570\u636e\uff1a%s\\n\"<\/span>, length, buffer);\r\n}\r\n<\/code><\/pre>\n<p>\u30b7\u30ea\u30a2\u30eb\u30dd\u30fc\u30c8\u304b\u3089read\u95a2\u6570\u3092\u4f7f\u7528\u3057\u3066\u30c7\u30fc\u30bf\u3092\u30d0\u30c3\u30d5\u30a1\u30fc\u306b\u683c\u7d0d\u3057\u3001\u8aad\u307f\u8fbc\u3093\u3060\u30d0\u30a4\u30c8\u6570\u3092\u8fd4\u3057\u307e\u3059\u3002\u30d0\u30c3\u30d5\u30a1\u30fc\u306e\u30b5\u30a4\u30ba\u306f\u30a2\u30d7\u30ea\u30b1\u30fc\u30b7\u30e7\u30f3\u306e\u30cb\u30fc\u30ba\u306b\u5408\u308f\u305b\u3066\u5909\u66f4\u3067\u304d\u307e\u3059\u3002<\/p>\n<ol>\n<li>\u30b7\u30ea\u30a2\u30eb\u30dd\u30fc\u30c8\u3092\u9589\u3058\u308b<\/li>\n<\/ol>\n<pre class=\"post-pre\"><code>close(serial_fd);\r\n<\/code><\/pre>\n<p>\u5b8c\u5168\u306a\u30b5\u30f3\u30d7\u30eb\u30b3\u30fc\u30c9\u306f\u4ee5\u4e0b\u306e\u901a\u308a\u3067\u3059\u3002<\/p>\n<pre class=\"post-pre\"><code><span class=\"hljs-meta\">#<span class=\"hljs-keyword\">include<\/span> <span class=\"hljs-string\">&lt;stdio.h&gt;<\/span><\/span>\r\n<span class=\"hljs-meta\">#<span class=\"hljs-keyword\">include<\/span> <span class=\"hljs-string\">&lt;stdlib.h&gt;<\/span><\/span>\r\n<span class=\"hljs-meta\">#<span class=\"hljs-keyword\">include<\/span> <span class=\"hljs-string\">&lt;fcntl.h&gt;<\/span><\/span>\r\n<span class=\"hljs-meta\">#<span class=\"hljs-keyword\">include<\/span> <span class=\"hljs-string\">&lt;unistd.h&gt;<\/span><\/span>\r\n<span class=\"hljs-meta\">#<span class=\"hljs-keyword\">include<\/span> <span class=\"hljs-string\">&lt;termios.h&gt;<\/span><\/span>\r\n\r\n<span class=\"hljs-type\">int<\/span> <span class=\"hljs-title function_\">main<\/span><span class=\"hljs-params\">()<\/span> {\r\n    <span class=\"hljs-type\">int<\/span> serial_fd = open(<span class=\"hljs-string\">\"\/dev\/ttyS0\"<\/span>, O_RDWR);\r\n    <span class=\"hljs-keyword\">if<\/span> (serial_fd == <span class=\"hljs-number\">-1<\/span>) {\r\n        perror(<span class=\"hljs-string\">\"\u65e0\u6cd5\u6253\u5f00\u4e32\u53e3\"<\/span>);\r\n        <span class=\"hljs-built_in\">exit<\/span>(<span class=\"hljs-number\">1<\/span>);\r\n    }\r\n\r\n    <span class=\"hljs-class\"><span class=\"hljs-keyword\">struct<\/span> <span class=\"hljs-title\">termios<\/span> <span class=\"hljs-title\">options<\/span>;<\/span>\r\n    tcgetattr(serial_fd, &amp;options);\r\n    cfsetispeed(&amp;options, B9600);\r\n    cfsetospeed(&amp;options, B9600);\r\n    options.c_cflag |= (CLOCAL | CREAD);\r\n    options.c_cflag &amp;= ~PARENB;\r\n    options.c_cflag &amp;= ~CSTOPB;\r\n    options.c_cflag &amp;= ~CSIZE;\r\n    options.c_cflag |= CS8;\r\n    tcsetattr(serial_fd, TCSANOW, &amp;options);\r\n\r\n    <span class=\"hljs-type\">char<\/span> buffer[<span class=\"hljs-number\">255<\/span>];\r\n    <span class=\"hljs-type\">int<\/span> length = read(serial_fd, buffer, <span class=\"hljs-keyword\">sizeof<\/span>(buffer));\r\n    <span class=\"hljs-keyword\">if<\/span> (length &gt; <span class=\"hljs-number\">0<\/span>) {\r\n        <span class=\"hljs-built_in\">printf<\/span>(<span class=\"hljs-string\">\"\u8bfb\u53d6\u5230\u4e86%d\u4e2a\u5b57\u8282\u7684\u6570\u636e\uff1a%s\\n\"<\/span>, length, buffer);\r\n    }\r\n\r\n    close(serial_fd);\r\n\r\n    <span class=\"hljs-keyword\">return<\/span> <span class=\"hljs-number\">0<\/span>;\r\n}\r\n<\/code><\/pre>\n<p>\u4e0a\u8a18\u306e\u30b5\u30f3\u30d7\u30eb\u30b3\u30fc\u30c9\u306f\u5358\u306a\u308b\u7c21\u5358\u306a\u30b5\u30f3\u30d7\u30eb\u3067\u3042\u308b\u305f\u3081\u3001\u5b9f\u969b\u306b\u306f\u72ec\u81ea\u306e\u8981\u4ef6\u306b\u9069\u5b9c\u5909\u66f4\u3092\u52a0\u3048\u3066\u3001\u30a8\u30e9\u30fc\u51e6\u7406\u3092\u884c\u3046\u5fc5\u8981\u304c\u3042\u308b\u3053\u3068\u306b\u6ce8\u610f\u3057\u3066\u304f\u3060\u3055\u3044\u3002<\/p>\n","protected":false},"excerpt":{"rendered":"<p>\u30b7\u30ea\u30a2\u30eb\u30dd\u30fc\u30c8\u30c7\u30fc\u30bf\u3092C\u8a00\u8a9e\u3067\u8aad\u307f\u53d6\u308b\u306b\u306f\u3001\u6b21\u306e\u624b\u9806\u306b\u5f93\u3044\u307e\u3059\u3002 \u30d8\u30c3\u30c0\u30fc\u30d5\u30a1\u30a4\u30eb\u306e\u30a4\u30f3\u30af\u30eb\u30fc\u30c9 #include &lt;stdio.h&gt; #include &lt;stdlib.h&gt; #include &#038; [&hellip;]<\/p>\n","protected":false},"author":11,"featured_media":0,"comment_status":"open","ping_status":"open","sticky":false,"template":"","format":"standard","meta":{"footnotes":""},"categories":[1],"tags":[],"class_list":["post-92677","post","type-post","status-publish","format-standard","hentry","category-uncategorized"],"yoast_head":"<!-- This site is optimized with the Yoast SEO Premium plugin v21.5 (Yoast SEO v21.5) - https:\/\/yoast.com\/wordpress\/plugins\/seo\/ -->\n<title>C\u8a00\u8a9e\u3067\u30b7\u30ea\u30a2\u30eb\u30dd\u30fc\u30c8\u30c7\u30fc\u30bf\u3092\u3069\u306e\u3088\u3046\u306b\u8aad\u307f\u8fbc\u3080\u304b - Blog - Silicon Cloud<\/title>\n<meta name=\"robots\" content=\"index, follow, max-snippet:-1, max-image-preview:large, max-video-preview:-1\" \/>\n<link rel=\"canonical\" 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content=\"https:\/\/www.silicloud.com\/ja\/blog\/c\u8a00\u8a9e\u3067\u30b7\u30ea\u30a2\u30eb\u30dd\u30fc\u30c8\u30c7\u30fc\u30bf\u3092\u3069\u306e\u3088\u3046\u306b\u8aad\u307f\u8fbc\/\" \/>\n<meta property=\"og:site_name\" content=\"Blog - Silicon Cloud\" \/>\n<meta property=\"article:published_time\" content=\"2024-03-21T06:35:11+00:00\" \/>\n<meta property=\"article:modified_time\" content=\"2024-03-27T23:55:53+00:00\" \/>\n<meta name=\"author\" content=\"\u512a\u6597, \u671d\u967d\" \/>\n<meta name=\"twitter:card\" content=\"summary_large_image\" \/>\n<meta name=\"twitter:label1\" content=\"\u57f7\u7b46\u8005\" \/>\n\t<meta name=\"twitter:data1\" content=\"\u512a\u6597, \u671d\u967d\" \/>\n\t<meta name=\"twitter:label2\" content=\"\u63a8\u5b9a\u8aad\u307f\u53d6\u308a\u6642\u9593\" \/>\n\t<meta name=\"twitter:data2\" content=\"1\u5206\" \/>\n<script type=\"application\/ld+json\" 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