{"id":788,"date":"2026-03-02T15:47:51","date_gmt":"2026-03-02T07:47:51","guid":{"rendered":"https:\/\/hsiang.cc\/?p=788"},"modified":"2026-03-02T15:56:21","modified_gmt":"2026-03-02T07:56:21","slug":"%e4%b8%80%e5%a0%b4%e8%bb%9f%e7%a1%ac%e9%ab%94%e5%b7%a5%e7%a8%8b%e5%b8%ab%e7%9a%84%e7%88%ad%e8%ab%96%ef%bc%9auart-%e7%ad%89%e6%96%bc-rs-232%e5%97%8e%ef%bc%9f","status":"publish","type":"post","link":"https:\/\/hsiang.cc\/?p=788","title":{"rendered":"\u4e00\u5834\u8edf\u786c\u9ad4\u5de5\u7a0b\u5e2b\u7684\u722d\u8ad6\uff1aUART \u7b49\u65bc RS-232\u55ce\uff1f"},"content":{"rendered":"<p>\u6700\u8fd1\u60f3\u5230\u5e7e\u5e74\u524d\u76ee\u7779\u7684\u4e00\u5834\u300c\u6280\u8853\u8faf\u8ad6\u300d\uff0c\u81f3\u4eca\u4ecd\u89ba\u5f97\u6709\u8da3\u3002<\/p>\n<p><strong>A \u540c\u4e8b\uff08\u8edf\u9ad4\u5de5\u7a0b\u5e2b\uff09<\/strong>\uff1a\u300cUART \u8ddf RS-232 \u5dee\u4e0d\u591a\u554a\uff0c\u4e0d\u90fd\u662f\u4e32\u5217\u901a\u8a0a\u55ce\uff1f\u300d<\/p>\n<p><strong>B \u540c\u4e8b\uff08\u786c\u9ad4\u5de5\u7a0b\u5e2b\uff09<\/strong>\uff1a\u300c\u4ec0\u9ebc\u5dee\u4e0d\u591a\uff1f\u9019\u5169\u500b\u660e\u660e\u5c31\u5dee\u5f88\u591a\uff0c\u662f\u5b8c\u5168\u4e0d\u4e00\u6a23\u7684\u6771\u897f\uff01\u300d<\/p>\n<p>\u7576\u6642\u6211\u807d\u5230\u7684\u53cd\u61c9\u662f\uff1a\u300c\u9019\u4e0d\u662f\u5dee\u4e0d\u591a\u7684\u6771\u897f\u55ce\uff1f\u300d\u7562\u7adf\u5728\u6211\u7684\u8a8d\u77e5\u88e1\uff1a<\/p>\n<ul>\n<li>\u90fd\u53eb <strong>serial<\/strong> \u901a\u8a0a<\/li>\n<li>\u90fd\u53ef\u4ee5\u8a2d\u5b9a <strong>baudrate<\/strong>\uff089600\u3001115200...\uff09<\/li>\n<li>\u958b\u767c\u6642\u90fd\u662f\u900f\u904e\u96fb\u8166\u7528 <strong>USB \u8f49 RS-232<\/strong> \u63a5\u5230\u958b\u767c\u677f\u4e0a<\/li>\n<li>\u7a0b\u5f0f\u78bc\u88e1\u9762\u90fd\u662f\u53eb\u5b83 <strong>UART<\/strong><\/li>\n<\/ul>\n<p>\u770b\u8d77\u4f86\u6839\u672c\u5c31\u662f\u540c\u4e00\u4ef6\u4e8b\u554a\uff1f\u70ba\u4ec0\u9ebc B \u540c\u4e8b\u6703\u9019\u9ebc\u6fc0\u52d5\uff1f<\/p>\n<p><!--more--><\/p>\n<hr \/>\n<h2>\u8a18\u61b6\u6df1\u8655\u7684\u7591\u60d1<\/h2>\n<p>\u5f8c\u4f86\u53c8\u60f3\u5230\u4ee5\u524d\u5b78\u6578\u4f4d\u96fb\u8def\u7684\u6642\u5019\uff0c\u8ab2\u672c\u4e0a\u4f3c\u4e4e\u6709\u63d0\u5230\uff1a<\/p>\n<ul>\n<li><strong>RS-232<\/strong> \u597d\u50cf\u6709\u8ca0\u96fb\u58d3\uff08-12V\u3001+12V \u4e4b\u985e\u7684\uff09<\/li>\n<li><strong>UART<\/strong> \u597d\u50cf\u53ea\u6709 0 \u548c 1 \u7684\u6982\u5ff5\uff08TTL \u96fb\u5e73\uff09<\/li>\n<\/ul>\n<p>\u9019\u8b93\u6211\u958b\u59cb\u61f7\u7591\uff1a\u5b83\u5011\u5230\u5e95\u662f\u4e00\u6a23\u7684\u6771\u897f\uff0c\u9084\u662f\u54ea\u88e1\u6709\u9ede\u4e0d\u4e00\u6a23\uff1f<\/p>\n<p>\u65bc\u662f\u6211\u6c7a\u5b9a\u82b1\u9ede\u6642\u9593\u628a\u9019\u500b\u554f\u984c\u67e5\u500b\u6e05\u695a\u3002<\/p>\n<p>\u67e5\u5b8c\u8cc7\u6599\u5f8c\uff0c\u6211\u7d42\u65bc\u7406\u89e3\u70ba\u4ec0\u9ebc\u5169\u4f4d\u540c\u4e8b\u6703\u6709\u5b8c\u5168\u76f8\u53cd\u7684\u770b\u6cd5\u4e86\uff1a<\/p>\n<blockquote>\n<p><strong>\u5f9e\u8edf\u9ad4\u89d2\u5ea6\u770b\uff1a\u57fa\u672c\u6c92\u6709\u5dee\u5225<\/strong><br \/>\n<strong>\u5f9e\u786c\u9ad4\u89d2\u5ea6\u770b\uff1a\u5929\u5dee\u5730\u5225<\/strong><\/p>\n<\/blockquote>\n<p>\u96e3\u602a A \u540c\u4e8b\u53ef\u4ee5\u8aaa\u5f97\u7406\u6240\u7576\u7136\uff0c\u537b\u53c8\u8b93 B \u540c\u4e8b\u6c23\u5f97\u534a\u6b7b......<\/p>\n<hr \/>\n<h2>\u8edf\u9ad4\u5de5\u7a0b\u5e2b\u7684\u8996\u89d2\uff1a\u5b83\u5011\u662f\u4e00\u6a23\u7684<\/h2>\n<p>\u5c0d\u8edf\u9ad4\u958b\u767c\u8005\u4f86\u8aaa\uff0cUART \u548c RS-232 \u5728\u7a0b\u5f0f\u78bc\u5c64\u9762\u5e7e\u4e4e\u5b8c\u5168\u76f8\u540c\uff1a<\/p>\n<h3>1. <strong>\u76f8\u540c\u7684 API<\/strong><\/h3>\n<pre><code class=\"language-c\">\/\/ \u7121\u8ad6\u662f UART \u9084\u662f RS-232\uff0c\u7a0b\u5f0f\u78bc\u90fd\u4e00\u6a23\nUART_Init(9600);           \/\/ \u8a2d\u5b9a baudrate\nUART_SendByte(0x55);       \/\/ \u767c\u9001\u8cc7\u6599\ndata = UART_ReceiveByte(); \/\/ \u63a5\u6536\u8cc7\u6599<\/code><\/pre>\n<pre><code class=\"language-python\"># Python \u7684 serial library\nimport serial\nser = serial.Serial(&#039;\/dev\/ttyUSB0&#039;, 9600)\nser.write(b&#039;Hello&#039;)  # \u4e0d\u7ba1\u5e95\u5c64\u662f UART \u9084\u662f RS-232<\/code><\/pre>\n<h3>2. <strong>\u76f8\u540c\u7684\u53c3\u6578\u8a2d\u5b9a<\/strong><\/h3>\n<ul>\n<li><strong>Baudrate<\/strong>\uff1a9600\u3001115200...<\/li>\n<li><strong>Data bits<\/strong>\uff1a7 \u6216 8<\/li>\n<li><strong>Stop bits<\/strong>\uff1a1 \u6216 2<\/li>\n<li><strong>Parity<\/strong>\uff1aNone\u3001Odd\u3001Even<\/li>\n<\/ul>\n<h3>3. <strong>\u76f8\u540c\u7684\u5354\u8b70\u908f\u8f2f<\/strong><\/h3>\n<pre><code>\u8d77\u59cb\u4f4d \u2192 \u6578\u64da\u4f4d \u2192 \u6821\u9a57\u4f4d \u2192 \u505c\u6b62\u4f4d\n[Start][D0 D1 D2 D3 D4 D5 D6 D7][Parity][Stop]<\/code><\/pre>\n<p>\u5c0d\u8edf\u9ad4\u5de5\u7a0b\u5e2b\u4f86\u8aaa\uff0c\u4f5c\u696d\u7cfb\u7d71\u548c\u9a45\u52d5\u7a0b\u5f0f\u5df2\u7d93\u628a\u5e95\u5c64\u5dee\u7570\u62bd\u8c61\u5316\u4e86\uff0c\u6240\u4ee5<strong>\u5728\u7a0b\u5f0f\u78bc\u5c64\u9762\u6839\u672c\u611f\u89ba\u4e0d\u5230\u5dee\u7570<\/strong>\u3002<\/p>\n<hr \/>\n<h2>\u786c\u9ad4\u5de5\u7a0b\u5e2b\u7684\u8996\u89d2\uff1a\u5b83\u5011\u5b8c\u5168\u4e0d\u540c<\/h2>\n<p>\u4f46\u5c0d\u786c\u9ad4\u5de5\u7a0b\u5e2b\u4f86\u8aaa\uff0c\u9019\u5169\u8005\u7684\u5dee\u7570\u5c31\u50cf\u300c\u8d70\u8def\u300d\u548c\u300c\u958b\u8eca\u300d\u4e00\u6a23\u660e\u986f\uff1a<\/p>\n<h3>1. <strong>\u96fb\u58d3\u6a19\u6e96\u5b8c\u5168\u4e0d\u540c<\/strong><\/h3>\n<table>\n<thead>\n<tr>\n<th>\u9805\u76ee<\/th>\n<th>UART (TTL)<\/th>\n<th>RS-232<\/th>\n<\/tr>\n<\/thead>\n<tbody>\n<tr>\n<td><strong>\u908f\u8f2f 0<\/strong><\/td>\n<td>0V<\/td>\n<td>+3V ~ +15V<\/td>\n<\/tr>\n<tr>\n<td><strong>\u908f\u8f2f 1<\/strong><\/td>\n<td>3.3V \u6216 5V<\/td>\n<td>-3V ~ -15V<\/td>\n<\/tr>\n<tr>\n<td><strong>\u96fb\u58d3\u7bc4\u570d<\/strong><\/td>\n<td>\u55ae\u96fb\u6e90<\/td>\n<td>\u96d9\u96fb\u6e90\uff08\u6b63\u8ca0\u96fb\u58d3\uff09<\/td>\n<\/tr>\n<\/tbody>\n<\/table>\n<p><strong>\u6ce8\u610f<\/strong>\uff1aRS-232 \u7684\u908f\u8f2f\u662f<strong>\u53cd\u5411<\/strong>\u7684\uff01\u8ca0\u96fb\u58d3\u4ee3\u8868 1\uff0c\u6b63\u96fb\u58d3\u4ee3\u8868 0\u3002<\/p>\n<h3>2. <strong>\u50b3\u8f38\u8ddd\u96e2\u5dee\u7570<\/strong><\/h3>\n<ul>\n<li><strong>UART<\/strong>\uff1a\u9069\u5408\u77ed\u8ddd\u96e2\uff08&lt; 1 \u516c\u5c3a\uff09\uff0c\u901a\u5e38\u7528\u65bc PCB \u677f\u4e0a\u6216\u76f8\u9130\u8a2d\u5099<\/li>\n<li><strong>RS-232<\/strong>\uff1a\u53ef\u9054 15 \u516c\u5c3a\uff0c\u9069\u5408\u5de5\u696d\u74b0\u5883<\/li>\n<\/ul>\n<h3>3. <strong>\u6297\u5e72\u64fe\u80fd\u529b<\/strong><\/h3>\n<ul>\n<li><strong>UART<\/strong>\uff1a\u55ae\u7aef\u8a0a\u865f\uff0c\u5bb9\u6613\u53d7\u5e72\u64fe<\/li>\n<li><strong>RS-232<\/strong>\uff1a\u8f03\u9ad8\u96fb\u58d3\u64fa\u5e45\uff0c\u6297\u5e72\u64fe\u80fd\u529b\u8f03\u5f37<\/li>\n<\/ul>\n<h3>4. <strong>\u9700\u8981\u96fb\u5e73\u8f49\u63db\u6676\u7247<\/strong><\/h3>\n<p>\u5982\u679c\u4f60\u7684\u5fae\u63a7\u5236\u5668\uff08\u5982 STM32\u3001Arduino\uff09\u4f7f\u7528 UART\uff0c\u4f46\u8981\u9023\u63a5\u5230\u96fb\u8166\u7684 RS-232 \u57e0\uff0c\u5c31\u9700\u8981\uff1a<\/p>\n<pre><code>MCU (UART\/TTL) \u2192 MAX232 \u6676\u7247 \u2192 RS-232 (\u96fb\u8166)\n     3.3V              \u96fb\u5e73\u8f49\u63db        \u00b112V<\/code><\/pre>\n<p><strong>MAX232<\/strong> \u9019\u985e\u6676\u7247\u7684\u5de5\u4f5c\u5c31\u662f\uff1a<\/p>\n<ul>\n<li>\u628a 0-5V \u8f49\u63db\u6210 \u00b112V<\/li>\n<li>\u628a\u908f\u8f2f\u53cd\u5411\uff080\u21941\uff09<\/li>\n<\/ul>\n<hr \/>\n<h2>\u5be6\u969b\u958b\u767c\u5834\u666f<\/h2>\n<h3>\u5834\u666f 1\uff1aArduino \u8207\u96fb\u8166\u901a\u8a0a<\/h3>\n<pre><code>Arduino (UART\/TTL 5V)\n    \u2193\nUSB \u8f49 TTL \u6a21\u7d44 (CH340\u3001CP2102)\n    \u2193\n\u96fb\u8166 USB \u57e0<\/code><\/pre>\n<p>\u9019\u88e1<strong>\u6c92\u6709\u7528\u5230 RS-232<\/strong>\uff0c\u662f\u7d14 UART \u901a\u8a0a\u3002<\/p>\n<h3>\u5834\u666f 2\uff1a\u5de5\u696d\u8a2d\u5099\u901a\u8a0a<\/h3>\n<pre><code>PLC (RS-232)\n    \u2193\nDB9 \u9023\u63a5\u5668\n    \u2193\n\u96fb\u8166 COM \u57e0 (RS-232)<\/code><\/pre>\n<p>\u9019\u88e1\u662f<strong>\u771f\u6b63\u7684 RS-232<\/strong>\uff0c\u4f7f\u7528 \u00b112V \u96fb\u58d3\u3002<\/p>\n<h3>\u5834\u666f 3\uff1a\u5d4c\u5165\u5f0f\u958b\u767c\u677f<\/h3>\n<pre><code>STM32 \u958b\u767c\u677f (UART\/TTL 3.3V)\n    \u2193\nUSB \u8f49 RS-232 \u6a21\u7d44 (\u5167\u5efa MAX232)\n    \u2193\n\u96fb\u8166 USB \u57e0<\/code><\/pre>\n<p>\u9019\u88e1\u6709<strong>\u96fb\u5e73\u8f49\u63db<\/strong>\uff0c\u5f9e UART \u8f49\u6210 RS-232 \u518d\u8f49\u6210 USB\u3002<\/p>\n<hr \/>\n<h2>\u672c\u8cea\u5dee\u7570\uff1a\u5354\u8b70 vs \u6a19\u6e96<\/h2>\n<p>\u7528\u4e00\u500b\u7c21\u55ae\u7684\u6bd4\u55bb\uff1a<\/p>\n<table>\n<thead>\n<tr>\n<th>\u6982\u5ff5<\/th>\n<th>UART<\/th>\n<th>RS-232<\/th>\n<\/tr>\n<\/thead>\n<tbody>\n<tr>\n<td><strong>\u672c\u8cea<\/strong><\/td>\n<td>\u901a\u8a0a\u5354\u8b70\uff08\u600e\u9ebc\u8aaa\u8a71\uff09<\/td>\n<td>\u7269\u7406\u5c64\u6a19\u6e96\uff08\u7528\u4ec0\u9ebc\u55d3\u9580\u8aaa\u8a71\uff09<\/td>\n<\/tr>\n<tr>\n<td><strong>\u6bd4\u55bb<\/strong><\/td>\n<td>\u8aaa\u4e2d\u6587<\/td>\n<td>\u7528\u64f4\u97f3\u5668\u8aaa\u4e2d\u6587<\/td>\n<\/tr>\n<tr>\n<td><strong>\u5b9a\u7fa9<\/strong><\/td>\n<td>\u6578\u64da\u683c\u5f0f\u3001\u6642\u5e8f<\/td>\n<td>\u96fb\u58d3\u3001\u9023\u63a5\u5668\u3001\u7dda\u7e9c\u898f\u7bc4<\/td>\n<\/tr>\n<\/tbody>\n<\/table>\n<p><strong>UART<\/strong> \u662f\u4e00\u7a2e<strong>\u5354\u8b70<\/strong>\uff0c\u5b9a\u7fa9\u4e86\uff1a<\/p>\n<ul>\n<li>\u5982\u4f55\u628a\u4e26\u5217\u8cc7\u6599\u8f49\u6210\u5e8f\u5217\u8cc7\u6599<\/li>\n<li>\u8d77\u59cb\u4f4d\u3001\u505c\u6b62\u4f4d\u3001\u6821\u9a57\u4f4d\u7684\u898f\u5247<\/li>\n<\/ul>\n<p><strong>RS-232<\/strong> \u662f\u4e00\u7a2e<strong>\u6a19\u6e96<\/strong>\uff0c\u5b9a\u7fa9\u4e86\uff1a<\/p>\n<ul>\n<li>\u4f7f\u7528\u4ec0\u9ebc\u96fb\u58d3\u4f86\u8868\u793a 0 \u548c 1<\/li>\n<li>\u4f7f\u7528\u4ec0\u9ebc\u9023\u63a5\u5668\uff08DB9\u3001DB25\uff09<\/li>\n<li>\u6700\u5927\u50b3\u8f38\u8ddd\u96e2\u548c\u901f\u5ea6<\/li>\n<\/ul>\n<p><strong>\u95dc\u9375<\/strong>\uff1aRS-232 <strong>\u4f7f\u7528<\/strong> UART \u5354\u8b70\uff0c\u4f46\u52a0\u4e0a\u4e86\u7279\u5b9a\u7684\u96fb\u6c23\u7279\u6027\u3002<\/p>\n<hr \/>\n<h2>\u70ba\u4ec0\u9ebc\u6703\u7522\u751f\u8aa4\u89e3\uff1f<\/h2>\n<h3>\u8edf\u9ad4\u5de5\u7a0b\u5e2b\u7684\u7fd2\u6163<\/h3>\n<ul>\n<li>\u95dc\u6ce8<strong>\u908f\u8f2f\u5c64<\/strong>\u548c<strong>\u61c9\u7528\u5c64<\/strong><\/li>\n<li>\u4f5c\u696d\u7cfb\u7d71\u5df2\u7d93\u62bd\u8c61\u5316\u5e95\u5c64\u5dee\u7570<\/li>\n<li>\u7a0b\u5f0f\u78bc\u770b\u8d77\u4f86\u5b8c\u5168\u4e00\u6a23<\/li>\n<\/ul>\n<h3>\u786c\u9ad4\u5de5\u7a0b\u5e2b\u7684\u7fd2\u6163<\/h3>\n<ul>\n<li>\u95dc\u6ce8<strong>\u96fb\u6c23\u7279\u6027<\/strong>\u548c<strong>\u7269\u7406\u5c64<\/strong><\/li>\n<li>\u9700\u8981\u9078\u64c7\u6b63\u78ba\u7684\u5143\u4ef6\uff08MAX232\u3001\u9023\u63a5\u5668\uff09<\/li>\n<li>\u932f\u8aa4\u7684\u96fb\u58d3\u6703\u71d2\u6bc0\u6676\u7247<\/li>\n<\/ul>\n<h3>\u65e5\u5e38\u7528\u8a9e\u7684\u6a21\u7cca<\/h3>\n<ul>\n<li>\u53ef\u80fd\u300cUSB \u8f49 RS-232\u300d\u5176\u5be6\u662f\u300cUSB \u8f49 UART\uff08TTL \u96fb\u5e73\uff09\u300d<\/li>\n<li>\u300c\u4e32\u53e3\u901a\u8a0a\u300d\u53ef\u80fd\u6307 UART\u3001RS-232\u3001RS-485...<\/li>\n<li>\u958b\u767c\u677f\u4e0a\u5beb\u7684\u300cUART\u300d\u63a5\u8173\uff0c\u53ef\u80fd\u900f\u904e\u8f49\u63db\u6676\u7247\u8b8a\u6210 RS-232<\/li>\n<\/ul>\n<hr \/>\n<h2>\u7d50\u8ad6\uff1a\u90fd\u5c0d\uff0c\u53ea\u662f\u89d2\u5ea6\u4e0d\u540c<\/h2>\n<p>\u56de\u5230\u6700\u521d\u7684\u722d\u8ad6\uff1a<\/p>\n<p><strong>A \u540c\u4e8b\uff08\u8edf\u9ad4\uff09\u8aaa\u300c\u5dee\u4e0d\u591a\u300d\u2192 \u5c0d\u7684<\/strong><\/p>\n<ul>\n<li>\u5f9e\u7a0b\u5f0f\u78bc\u89d2\u5ea6\uff0cAPI \u548c\u5354\u8b70\u908f\u8f2f\u5b8c\u5168\u76f8\u540c<\/li>\n<li>\u8edf\u9ad4\u958b\u767c\u6642\u4e0d\u9700\u8981\u95dc\u5fc3\u96fb\u58d3\u5dee\u7570<\/li>\n<\/ul>\n<p><strong>B \u540c\u4e8b\uff08\u786c\u9ad4\uff09\u8aaa\u300c\u5b8c\u5168\u4e0d\u540c\u300d\u2192 \u4e5f\u5c0d<\/strong><\/p>\n<ul>\n<li>\u5f9e\u96fb\u8def\u8a2d\u8a08\u89d2\u5ea6\uff0c\u96fb\u58d3\u3001\u5143\u4ef6\u3001PCB \u4f48\u7dda\u90fd\u4e0d\u540c<\/li>\n<li>\u63a5\u932f\u7dda\u53ef\u80fd\u6703\u71d2\u6bc0\u6676\u7247<\/li>\n<\/ul>\n<hr \/>\n<h2>\u7d66\u5de5\u7a0b\u5e2b\u7684\u5efa\u8b70<\/h2>\n<h3>\u8edf\u9ad4\u5de5\u7a0b\u5e2b<\/h3>\n<ul>\n<li>\u2705 \u7406\u89e3\u5e95\u5c64\u7269\u7406\u5dee\u7570\u6709\u52a9\u65bc\u9664\u932f\u786c\u9ad4\u554f\u984c<\/li>\n<li>\u2705 \u77e5\u9053\u70ba\u4ec0\u9ebc\u6709\u6642\u9700\u8981\u300cUSB \u8f49 TTL\u300d\uff0c\u6709\u6642\u9700\u8981\u300cUSB \u8f49 RS-232\u300d<\/li>\n<li>\u2705 \u9047\u5230\u901a\u8a0a\u554f\u984c\u6642\uff0c\u5148\u78ba\u8a8d\u96fb\u58d3\u548c\u63a5\u7dda\u662f\u5426\u6b63\u78ba<\/li>\n<\/ul>\n<h3>\u786c\u9ad4\u5de5\u7a0b\u5e2b<\/h3>\n<ul>\n<li>\u2705 \u7406\u89e3\u8edf\u9ad4\u8996\u89d2\u7684\u62bd\u8c61\u5316\u662f\u5408\u7406\u7684<\/li>\n<li>\u2705 \u6e9d\u901a\u6642\u53ef\u4ee5\u8aaa\u660e\u300c\u5354\u8b70\u76f8\u540c\uff0c\u4f46\u96fb\u6c23\u7279\u6027\u4e0d\u540c\u300d<\/li>\n<li>\u2705 \u63d0\u4f9b\u6e05\u695a\u7684\u786c\u9ad4\u898f\u683c\u6587\u4ef6\u7d66\u8edf\u9ad4\u5718\u968a<\/li>\n<\/ul>\n<h3>\u8de8\u9818\u57df\u6e9d\u901a<\/h3>\n<p>\u7576\u8a0e\u8ad6\u6280\u8853\u554f\u984c\u6642\uff0c\u5148\u78ba\u8a8d\uff1a<\/p>\n<ul>\n<li>\ud83e\udd14 \u6211\u5011\u5728\u8a0e\u8ad6<strong>\u5354\u8b70\u5c64<\/strong>\u9084\u662f<strong>\u7269\u7406\u5c64<\/strong>\uff1f<\/li>\n<li>\ud83e\udd14 \u5c0d\u65b9\u7684\u80cc\u666f\u662f\u8edf\u9ad4\u9084\u662f\u786c\u9ad4\uff1f<\/li>\n<li>\ud83e\udd14 \u9019\u500b\u5dee\u7570\u5728\u7576\u524d\u60c5\u5883\u4e0b\u91cd\u8981\u55ce\uff1f<\/li>\n<\/ul>\n<hr \/>\n<h2>\u6700\u5f8c\u7684\u555f\u793a<\/h2>\n<p>\u9019\u500b\u6545\u4e8b\u544a\u8a34\u6211\u5011\uff1a<\/p>\n<blockquote>\n<p><strong>\u6280\u8853\u722d\u8ad6\u5f80\u5f80\u4e0d\u662f\u8ab0\u5c0d\u8ab0\u932f\uff0c\u800c\u662f\u7ad9\u5728\u4e0d\u540c\u7684\u62bd\u8c61\u5c64\u6b21\u770b\u554f\u984c\u3002<\/strong><\/p>\n<\/blockquote>\n<p>\u5c31\u50cf\u76f2\u4eba\u6478\u8c61\uff0c\u8edf\u9ad4\u5de5\u7a0b\u5e2b\u6478\u5230\u7684\u662f\u300c\u5354\u8b70\u300d\u9019\u96bb\u8c61\u817f\uff0c\u786c\u9ad4\u5de5\u7a0b\u5e2b\u6478\u5230\u7684\u662f\u300c\u96fb\u6c23\u7279\u6027\u300d\u9019\u96bb\u8c61\u9f3b\uff0c\u5927\u5bb6\u90fd\u6c92\u932f\uff0c\u53ea\u662f\u770b\u5230\u7684\u9762\u5411\u4e0d\u540c\u3002<\/p>\n<p>\u4e0b\u6b21\u9047\u5230\u985e\u4f3c\u7684\u722d\u8ad6\u6642\uff0c\u4e0d\u59a8\u5148\u554f\u4e00\u53e5\uff1a<\/p>\n<p><strong>\u300c\u6211\u5011\u662f\u5728\u8a0e\u8ad6\u540c\u4e00\u500b\u5c64\u6b21\u7684\u554f\u984c\u55ce\uff1f\u300d<\/strong><\/p>\n<p>\u4e5f\u8a31\u5c31\u80fd\u907f\u514d\u4e00\u5834\u7121\u8b02\u7684\u722d\u57f7\uff0c\u9084\u80fd\u5b78\u5230\u65b0\u77e5\u8b58\u3002<\/p>\n<hr \/>\n<p><strong>\u9644\u9304\uff1a\u5feb\u901f\u67e5\u8868<\/strong><\/p>\n<table>\n<thead>\n<tr>\n<th>\u6bd4\u8f03\u9805\u76ee<\/th>\n<th>UART<\/th>\n<th>RS-232<\/th>\n<\/tr>\n<\/thead>\n<tbody>\n<tr>\n<td><strong>\u985e\u578b<\/strong><\/td>\n<td>\u5354\u8b70<\/td>\n<td>\u7269\u7406\u5c64\u6a19\u6e96<\/td>\n<\/tr>\n<tr>\n<td><strong>\u96fb\u58d3<\/strong><\/td>\n<td>0-5V (TTL)<\/td>\n<td>\u00b13V ~ \u00b115V<\/td>\n<\/tr>\n<tr>\n<td><strong>\u908f\u8f2f 1<\/strong><\/td>\n<td>\u9ad8\u96fb\u58d3<\/td>\n<td>\u8ca0\u96fb\u58d3<\/td>\n<\/tr>\n<tr>\n<td><strong>\u8ddd\u96e2<\/strong><\/td>\n<td>&lt; 1m<\/td>\n<td>\u6700\u9060 15m<\/td>\n<\/tr>\n<tr>\n<td><strong>\u8edf\u9ad4\u5dee\u7570<\/strong><\/td>\n<td>\u7121<\/td>\n<td>\u7121<\/td>\n<\/tr>\n<tr>\n<td><strong>\u786c\u9ad4\u5dee\u7570<\/strong><\/td>\n<td>\u6709<\/td>\n<td>\u6709<\/td>\n<\/tr>\n<tr>\n<td><strong>\u9700\u8981\u8f49\u63db\u6676\u7247<\/strong><\/td>\n<td>\u5426<\/td>\n<td>\u662f\uff08\u5982 MAX232\uff09<\/td>\n<\/tr>\n<tr>\n<td><strong>\u61c9\u7528\u5834\u666f<\/strong><\/td>\n<td>\u677f\u4e0a\u901a\u8a0a\u3001\u6a21\u7d44<\/td>\n<td>\u5de5\u696d\u8a2d\u5099\u3001\u9577\u8ddd\u96e2<\/td>\n<\/tr>\n<\/tbody>\n<\/table>\n<hr \/>\n<p>\u5e0c\u671b\u9019\u7bc7\u6587\u7ae0\u80fd\u5e6b\u52a9\u66f4\u591a\u5de5\u7a0b\u5e2b\u7406\u89e3 UART \u548c RS-232 \u7684\u95dc\u4fc2\uff0c\u4e5f\u8b93\u8edf\u786c\u9ad4\u5718\u968a\u7684\u6e9d\u901a\u66f4\u9806\u66a2\uff01 \ud83d\ude0a<\/p>\n","protected":false},"excerpt":{"rendered":"<p>\u6700\u8fd1\u60f3\u5230\u5e7e\u5e74\u524d\u76ee\u7779\u7684\u4e00\u5834\u300c\u6280\u8853\u8faf\u8ad6\u300d\uff0c\u81f3\u4eca\u4ecd\u89ba\u5f97\u6709\u8da3\u3002 A \u540c\u4e8b\uff08\u8edf\u9ad4\u5de5\u7a0b\u5e2b\uff09\uff1a &hellip; <a href=\"https:\/\/hsiang.cc\/?p=788\">\u95b1\u8b80\u5168\u6587 <span class=\"meta-nav\">&rarr;<\/span><\/a><\/p>\n","protected":false},"author":1,"featured_media":0,"comment_status":"open","ping_status":"open","sticky":false,"template":"","format":"standard","meta":{"_jetpack_memberships_contains_paid_content":false,"footnotes":""},"categories":[396],"tags":[840,837,844,839,836,838,841,843,842],"class_list":["post-788","post","type-post","status-publish","format-standard","hentry","category-tech","tag-baudrate","tag-rs-232","tag-serial","tag-ttl","tag-uart","tag-838","tag-841","tag-843","tag-842"],"jetpack_featured_media_url":"","jetpack_sharing_enabled":true,"_links":{"self":[{"href":"https:\/\/hsiang.cc\/index.php?rest_route=\/wp\/v2\/posts\/788","targetHints":{"allow":["GET"]}}],"collection":[{"href":"https:\/\/hsiang.cc\/index.php?rest_route=\/wp\/v2\/posts"}],"about":[{"href":"https:\/\/hsiang.cc\/index.php?rest_route=\/wp\/v2\/types\/post"}],"author":[{"embeddable":true,"href":"https:\/\/hsiang.cc\/index.php?rest_route=\/wp\/v2\/users\/1"}],"replies":[{"embeddable":true,"href":"https:\/\/hsiang.cc\/index.php?rest_route=%2Fwp%2Fv2%2Fcomments&post=788"}],"version-history":[{"count":2,"href":"https:\/\/hsiang.cc\/index.php?rest_route=\/wp\/v2\/posts\/788\/revisions"}],"predecessor-version":[{"id":790,"href":"https:\/\/hsiang.cc\/index.php?rest_route=\/wp\/v2\/posts\/788\/revisions\/790"}],"wp:attachment":[{"href":"https:\/\/hsiang.cc\/index.php?rest_route=%2Fwp%2Fv2%2Fmedia&parent=788"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"https:\/\/hsiang.cc\/index.php?rest_route=%2Fwp%2Fv2%2Fcategories&post=788"},{"taxonomy":"post_tag","embeddable":true,"href":"https:\/\/hsiang.cc\/index.php?rest_route=%2Fwp%2Fv2%2Ftags&post=788"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}