{"id":43117,"date":"2025-06-11T08:55:17","date_gmt":"2025-06-11T00:55:17","guid":{"rendered":"https:\/\/www.wsisp.com\/helps\/43117.html"},"modified":"2025-06-11T08:55:17","modified_gmt":"2025-06-11T00:55:17","slug":"%e3%80%90%e6%ad%a3%e7%82%b9%e5%8e%9f%e5%ad%90stm32%e3%80%91rs485%e4%b8%b2%e8%a1%8c%e9%80%9a%e4%bf%a1%e6%a0%87%e5%87%86%ef%bc%88%e4%b8%b2%e5%8f%a3%e5%9f%ba%e7%a1%80%e5%8d%8f%e8%ae%ae-%e5%92%8c-modbus","status":"publish","type":"post","link":"https:\/\/www.wsisp.com\/helps\/43117.html","title":{"rendered":"\u3010\u6b63\u70b9\u539f\u5b50STM32\u3011RS485\u4e32\u884c\u901a\u4fe1\u6807\u51c6\uff08\u4e32\u53e3\u57fa\u7840\u534f\u8bae \u548c MODBUS\u534f\u8bae\u3001\u603b\u7ebf\u8fde\u63a5\u3001\u901a\u4fe1\u7535\u8def\u3001\u901a\u4fe1\u6ce2\u5f62\u56fe\u3001RS485\u76f8\u5173HAL\u5e93\u9a71\u52a8\u3001RS485\u914d\u7f6e\u6b65\u9aa4\u3001\uff09"},"content":{"rendered":"<p>\u4e00\u3001RS485\u4ecb\u7ecd \u4e8c\u3001RS485\u76f8\u5173HAL\u5e93\u9a71\u52a8\u4ecb\u7ecd 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color=\"Purple\">\u4e32\u53e3\u57fa\u7840\u534f\u8bae \u548c MODBUS\u534f\u8bae<\/font><\/h2>\n<p>\u4e32\u53e3\u57fa\u7840\u534f\u8bae&#xff08;Serial Port Basic Protocol&#xff09;\u901a\u5e38\u6307\u7684\u662f\u7528\u4e8e\u4e32\u884c\u901a\u4fe1\u7684\u57fa\u672c\u89c4\u5219&#xff0c;\u5b83\u5b9a\u4e49\u4e86\u6570\u636e\u5728\u4e32\u884c\u94fe\u8def\u4e0a\u5982\u4f55\u8fdb\u884c\u4f20\u8f93&#xff0c;\u5305\u62ec\u4f46\u4e0d\u9650\u4e8e\u4ee5\u4e0b\u51e0\u4e2a\u5173\u952e\u8981\u7d20&#xff1a;<\/p>\n<li>\u901a\u4fe1\u65f6\u5e8f&#xff1a;\u542f\u52a8\u4f4d\u3001\u6570\u636e\u4f4d&#xff08;\u4e00\u822c\u4e3a5\u52308\u4f4d&#xff09;\u3001\u5947\u5076\u6821\u9a8c\u4f4d&#xff08;\u53ef\u9009&#xff09;\u548c\u505c\u6b62\u4f4d&#xff08;1\u52302\u4f4d&#xff09;\u3002<\/li>\n<li>\u6ce2\u7279\u7387&#xff1a;\u6bcf\u79d2\u4f20\u8f93\u7684\u4f4d\u6570&#xff0c;\u5e38\u89c1\u7684\u67099600\u300119200\u300138400\u3001115200\u7b49\u3002<\/li>\n<li>\u901a\u4fe1\u65b9\u5411&#xff1a;\u53ef\u4ee5\u662f\u5168\u53cc\u5de5&#xff08;\u540c\u65f6\u53d1\u9001\u548c\u63a5\u6536\u6570\u636e&#xff09;\u3001\u534a\u53cc\u5de5&#xff08;\u540c\u4e00\u65f6\u95f4\u53ea\u80fd\u8fdb\u884c\u53d1\u9001\u6216\u63a5\u6536&#xff09;\u6216\u5355\u5de5&#xff08;\u53ea\u80fd\u53d1\u9001\u6216\u53ea\u80fd\u63a5\u6536&#xff09;\u3002<\/li>\n<p>\u800cMODBUS\u534f\u8bae\u5219\u5efa\u7acb\u5728\u4e32\u53e3\u57fa\u7840\u534f\u8bae\u4e4b\u4e0a&#xff0c;\u662f\u4e00\u79cd\u5e94\u7528\u5c42\u534f\u8bae&#xff0c;\u7528\u4e8e\u5728\u4e0d\u540c\u8bbe\u5907\u95f4\u8fdb\u884c\u6570\u636e\u4ea4\u6362&#xff0c;\u7279\u522b\u662f\u5de5\u4e1a\u63a7\u5236\u7cfb\u7edf\u4e2d\u7684\u73b0\u573a\u8bbe\u5907\u5982PLC\u3001\u667a\u80fd\u4eea\u8868\u3001\u4f20\u611f\u5668\u548c\u6267\u884c\u5668\u7b49\u3002MODBUS\u534f\u8bae\u7684\u7279\u70b9\u5305\u62ec&#xff1a;<\/p>\n<li>\u4e3b\u4ece\u7ed3\u6784&#xff1a;\u7f51\u7edc\u4e2d\u6709\u4e00\u4e2a\u4e3b\u8bbe\u5907&#xff08;\u4e3b\u63a7\u5236\u5668&#xff09;\u5411\u591a\u4e2a\u4ece\u8bbe\u5907\u53d1\u8d77\u8bf7\u6c42&#xff0c;\u4ece\u8bbe\u5907\u54cd\u5e94\u8bf7\u6c42\u3002<\/li>\n<li>\u529f\u80fd\u7801&#xff1a;MODBUS\u534f\u8bae\u5b9a\u4e49\u4e86\u4e00\u7cfb\u5217\u529f\u80fd\u7801&#xff0c;\u6bcf\u4e2a\u529f\u80fd\u7801\u5bf9\u5e94\u4e00\u79cd\u64cd\u4f5c&#xff0c;\u5982\u8bfb\u53d6\u7ebf\u5708\u72b6\u6001\u3001\u5bc4\u5b58\u5668\u503c&#xff0c;\u5199\u5165\u7ebf\u5708\u72b6\u6001\u3001\u5bc4\u5b58\u5668\u503c\u7b49\u3002<\/li>\n<li>\u6570\u636e\u7ec4\u7ec7&#xff1a;MODBUS\u534f\u8bae\u4e2d\u7684\u6570\u636e\u4f20\u8f93\u5305\u62ec\u8bbe\u5907\u5730\u5740\u3001\u529f\u80fd\u7801\u3001\u6570\u636e\u533a&#xff08;\u6570\u636e\u957f\u5ea6\u6839\u636e\u529f\u80fd\u7801\u5b9a\u4e49&#xff09;\u548c\u6821\u9a8c\u7801&#xff08;\u5982RTU\u6a21\u5f0f\u4e0b\u7684CRC\u6821\u9a8c&#xff09;\u3002<\/li>\n<p>\u5728\u5b9e\u9645\u5e94\u7528\u4e2d&#xff0c;\u4e32\u53e3\u57fa\u7840\u534f\u8bae\u63d0\u4f9b\u7684\u662f\u7269\u7406\u5c42\u548c\u94fe\u8def\u5c42\u7684\u901a\u4fe1\u57fa\u7840&#xff0c;\u800cMODBUS\u534f\u8bae\u5219\u662f\u66f4\u9ad8\u5c42\u6b21\u7684\u5e94\u7528\u5c42\u534f\u8bae&#xff0c;\u5b83\u89c4\u5b9a\u4e86\u5982\u4f55\u5728\u4e32\u53e3\u901a\u4fe1\u7684\u57fa\u7840\u4e0a\u6784\u9020\u6709\u610f\u4e49\u7684\u6d88\u606f\u7ed3\u6784&#xff0c;\u4ece\u800c\u5b9e\u73b0\u8bbe\u5907\u95f4\u590d\u6742\u7684\u63a7\u5236\u548c\u6570\u636e\u4ea4\u6362\u3002<\/p>\n<h2><font color=\"Purple\">MODBUS\u534f\u8bae<\/font><\/h2>\n<p>MODBUS\u534f\u8bae\u662f\u4e00\u79cd\u5e7f\u6cdb\u5e94\u7528\u4e8e\u5de5\u4e1a\u63a7\u5236\u9886\u57df\u7684\u4e32\u884c\u901a\u4fe1\u534f\u8bae&#xff0c;\u6700\u521d\u7531Modicon\u516c\u53f8\u4e8e1979\u5e74\u53d1\u5e03&#xff0c;\u73b0\u5df2\u6210\u4e3a\u4e00\u79cd\u901a\u7528\u7684\u5de5\u4e1a\u6807\u51c6\u534f\u8bae\u3002MODBUS\u5141\u8bb8\u4e0d\u540c\u5382\u5546\u7684\u8bbe\u5907\u901a\u8fc7\u4e32\u884c\u7ebf\u8def\u6216\u4ee5\u592a\u7f51\u8fdb\u884c\u901a\u4fe1&#xff0c;\u4ece\u800c\u5b9e\u73b0\u4e86\u4e0d\u540c\u8bbe\u5907\u4e4b\u95f4\u7684\u4e92\u64cd\u4f5c\u6027\u3002<\/p>\n<p>MODBUS\u534f\u8bae\u4e3b\u8981\u7279\u70b9&#xff1a;<\/p>\n<li>\u4e3b\u4ece\u67b6\u6784&#xff1a;\u7f51\u7edc\u4e2d\u53ea\u6709\u4e00\u4e2a\u4e3b\u8bbe\u5907&#xff08;\u5982PLC\u6216HMI&#xff09;&#xff0c;\u53ef\u4ee5\u5411\u591a\u4e2a\u4ece\u8bbe\u5907&#xff08;\u5982\u4f20\u611f\u5668\u3001\u6267\u884c\u5668\u3001\u5176\u4ed6\u63a7\u5236\u5668\u7b49&#xff09;\u53d1\u9001\u8bf7\u6c42\u5e76\u63a5\u6536\u54cd\u5e94\u3002<\/li>\n<li>\u529f\u80fd\u7801&#xff1a;MODBUS\u534f\u8bae\u5b9a\u4e49\u4e86\u4e00\u7cfb\u5217\u529f\u80fd\u7801&#xff0c;\u7528\u4e8e\u6267\u884c\u8bfb\u5199\u64cd\u4f5c&#xff0c;\u5982\u8bfb\u53d6\u7ebf\u5708\u72b6\u6001\u3001\u5bc4\u5b58\u5668\u503c\u3001\u8f93\u5165\u72b6\u6001&#xff0c;\u5199\u5165\u7ebf\u5708\u72b6\u6001\u3001\u5bc4\u5b58\u5668\u503c\u7b49\u3002<\/li>\n<li>\u6570\u636e\u4f20\u8f93\u6a21\u5f0f&#xff1a;MODBUS\u652f\u6301ASCII\u3001RTU&#xff08;Remote Terminal Unit&#xff09;\u548cTCP\/IP\u4e09\u79cd\u4f20\u8f93\u6a21\u5f0f\u3002\u5176\u4e2d&#xff0c;ASCII\u6a21\u5f0f\u9002\u5408\u4e8e\u4f4e\u901f\u901a\u4fe1\u548c\u6613\u4e8e\u8c03\u8bd5&#xff0c;RTU\u6a21\u5f0f\u9002\u7528\u4e8e\u9ad8\u901f\u901a\u4fe1\u4e14\u6548\u7387\u8f83\u9ad8&#xff0c;TCP\/IP\u6a21\u5f0f\u5219\u652f\u6301\u5728\u7f51\u7edc\u73af\u5883\u4e2d\u4f20\u8f93MODBUS\u534f\u8bae\u3002<\/li>\n<p>MODBUS\u534f\u8bae\u7684\u6570\u636e\u5e27\u7ed3\u6784&#xff1a;<\/p>\n<ul>\n<li>MODBUS RTU\u6a21\u5f0f&#xff1a;\u5305\u542b\u8bbe\u5907\u5730\u5740\u3001\u529f\u80fd\u7801\u3001\u6570\u636e\u533a&#xff08;\u957f\u5ea6\u6839\u636e\u529f\u80fd\u7801\u51b3\u5b9a&#xff09;\u3001CRC\u6821\u9a8c\u7801\u3002<\/li>\n<li>MODBUS ASCII\u6a21\u5f0f&#xff1a;\u5728RTU\u6a21\u5f0f\u57fa\u7840\u4e0a\u589e\u52a0\u4e86\u8d77\u59cb\u5b57\u7b26\u3001\u7ed3\u675f\u5b57\u7b26\u548cLRC\u6821\u9a8c\u7801\u3002<\/li>\n<li>MODBUS TCP\/IP\u6a21\u5f0f&#xff1a;\u4ee5TCP\u62a5\u6587\u7684\u5f62\u5f0f\u5c01\u88c5MODBUS\u6570\u636e&#xff0c;\u5305\u542b\u8bbe\u5907\u5730\u5740&#xff08;\u5728TCP\u8fde\u63a5\u4e2d\u9690\u542b&#xff0c;\u4e0d\u518d\u5728\u62a5\u6587\u4e2d\u643a\u5e26&#xff09;\u3001\u529f\u80fd\u7801\u3001\u6570\u636e\u533a\u3001CRC\u6821\u9a8c\u7801&#xff08;TCP\u5c42\u4e0d\u9700\u8981&#xff0c;MODBUS-TCP\u5c42\u53ef\u9009&#xff09;\u3002<\/li>\n<\/ul>\n<p>MODBUS\u534f\u8bae\u5728\u5b9e\u9645\u5e94\u7528\u4e2d&#xff0c;\u4e3b\u8bbe\u5907\u53ef\u4ee5\u5411\u4ece\u8bbe\u5907\u53d1\u51fa\u8bfb\u5199\u8bf7\u6c42&#xff0c;\u4ece\u8bbe\u5907\u5728\u63a5\u6536\u5230\u8bf7\u6c42\u540e\u6839\u636e\u529f\u80fd\u7801\u6267\u884c\u76f8\u5e94\u64cd\u4f5c&#xff0c;\u5e76\u5c06\u7ed3\u679c\u8fd4\u56de\u7ed9\u4e3b\u8bbe\u5907\u3002\u7531\u4e8e\u5176\u7b80\u6d01\u3001\u901a\u7528\u548c\u5f00\u653e\u7684\u7279\u6027&#xff0c;MODBUS\u5728\u5de5\u4e1a\u81ea\u52a8\u5316\u3001\u697c\u5b87\u81ea\u52a8\u5316\u3001\u80fd\u6e90\u7ba1\u7406\u7cfb\u7edf\u7b49\u591a\u4e2a\u9886\u57df\u5f97\u5230\u5e7f\u6cdb\u5e94\u7528\u3002<\/p>\n<hr \/>\n<h2><span id=\"click_jump1\"><font color=\"Blue\">\u4e00\u3001RS485\u4ecb\u7ecd<\/font><\/span><\/h2>\n<p><img decoding=\"async\" src=\"https:\/\/www.wsisp.com\/helps\/wp-content\/uploads\/2025\/06\/20250611005509-6848d3ed85494.png\" alt=\"\u5728\u8fd9\u91cc\u63d2\u5165\u56fe\u7247\u63cf\u8ff0\" \/> RS485\u662f\u4e00\u79cd\u4e32\u884c\u901a\u4fe1\u6807\u51c6&#xff0c;\u5b83\u5229\u7528\u5dee\u5206\u4fe1\u53f7\u5bf9&#xff08;\u901a\u5e38\u662f\u4e00\u5bf9\u975e\u7edd\u7f18\u7684\u5bfc\u7ebfA\u548cB&#xff09;\u6765\u4f20\u8f93\u6570\u636e&#xff0c;\u7531\u4e8e\u5176\u5dee\u5206\u4fe1\u53f7\u7684\u6027\u8d28&#xff0c;\u4f7f\u5f97\u5b83\u5177\u6709\u5f88\u5f3a\u7684\u6297\u5171\u6a21\u5e72\u6270\u80fd\u529b&#xff0c;\u7279\u522b\u9002\u7528\u4e8e\u5de5\u4e1a\u63a7\u5236\u73af\u5883&#xff0c;\u80fd\u591f\u786e\u4fdd\u5728\u957f\u8ddd\u79bb\u3001\u590d\u6742\u7535\u78c1\u73af\u5883\u4e0b\u7a33\u5b9a\u901a\u4fe1\u3002<\/p>\n<p>RS485\u63a5\u53e3\u5141\u8bb8\u6784\u5efa\u5927\u578b\u5206\u5e03\u5f0f\u7cfb\u7edf&#xff0c;\u652f\u6301\u591a\u8fbe32\u4e2a\u8282\u70b9&#xff08;\u5728\u67d0\u4e9b\u6761\u4ef6\u4e0b\u751a\u81f3\u66f4\u591a&#xff09;\u6302\u63a5\u5728\u540c\u4e00\u603b\u7ebf\u4e0a&#xff0c;\u5e76\u4e14\u6bcf\u4e2a\u8282\u70b9\u65e2\u53ef\u4ee5\u4f5c\u4e3a\u4e3b\u8bbe\u5907\u4e5f\u53ef\u4ee5\u4f5c\u4e3a\u4ece\u8bbe\u5907&#xff0c;\u975e\u5e38\u9002\u5408\u6784\u5efa\u591a\u70b9\u5bf9\u591a\u70b9\u7684\u7f51\u7edc\u67b6\u6784\u3002<\/p>\n<p>\u4e32\u53e3\u57fa\u7840\u534f\u8bae\u662f\u6307\u6700\u5e95\u5c42\u7684\u6570\u636e\u4f20\u8f93\u89c4\u5219&#xff0c;\u5305\u62ec\u4f46\u4e0d\u9650\u4e8e\u6570\u636e\u4f4d\u7684\u5b9a\u4e49&#xff08;\u4f8b\u59828\u4f4d\u62169\u4f4d\u6570\u636e\u4f4d&#xff09;\u3001\u6ce2\u7279\u7387\u8bbe\u7f6e\u3001\u505c\u6b62\u4f4d\u6570\u91cf\u4ee5\u53ca\u5947\u5076\u6821\u9a8c\u7b49\u53c2\u6570&#xff0c;\u8fd9\u4e9b\u53c2\u6570\u5171\u540c\u51b3\u5b9a\u4e86\u6570\u636e\u7684\u57fa\u672c\u5305\u683c\u5f0f\u3002<\/p>\n<p>\u800cMODBUS\u534f\u8bae\u662f\u5728\u4e32\u53e3\u57fa\u7840\u534f\u8bae\u4e4b\u4e0a\u7684\u5e94\u7528\u5c42\u534f\u8bae&#xff0c;\u5b83\u5b9a\u4e49\u4e86\u66f4\u9ad8\u7ea7\u522b\u7684\u6570\u636e\u6253\u5305\u3001\u5bfb\u5740\u3001\u9519\u8bef\u68c0\u6d4b\u4ee5\u53ca\u6570\u636e\u4ea4\u6362\u7684\u5177\u4f53\u8fc7\u7a0b\u3002MODBUS\u534f\u8bae\u5229\u7528\u4e32\u53e3\u57fa\u7840\u534f\u8bae\u63d0\u4f9b\u7684\u4f20\u8f93\u673a\u5236&#xff0c;\u5c06\u6570\u636e\u6309\u7167\u7279\u5b9a\u7684\u5e27\u683c\u5f0f\u8fdb\u884c\u7ec4\u7ec7&#xff0c;\u4ece\u800c\u5b9e\u73b0\u5728\u591a\u4e2a\u8bbe\u5907\u95f4\u7684\u62a5\u6587\u4ea4\u6362\u548c\u8bbe\u5907\u63a7\u5236\u3002MODBUS\u534f\u8bae\u56e0\u5176\u5f00\u653e\u6027\u548c\u901a\u7528\u6027&#xff0c;\u5728\u5de5\u4e1a\u81ea\u52a8\u5316\u9886\u57df\u5f97\u5230\u4e86\u5e7f\u6cdb\u5e94\u7528\u3002<\/p>\n<p>\u603b\u7ed3RS485\u63a5\u53e3\u7684\u5173\u952e\u7279\u6027\u5982\u4e0b&#xff1a;<\/p>\n<ul>\n<li>\u901a\u4fe1\u65b9\u5f0f&#xff1a;\u534a\u53cc\u5de5\u6216\u5168\u53cc\u5de5&#xff08;\u53d6\u51b3\u4e8e\u5177\u4f53\u5e94\u7528\u914d\u7f6e&#xff09;<\/li>\n<li>\u4fe1\u53f7\u7ebf&#xff1a;\u4e00\u5bf9\u5dee\u5206\u4fe1\u53f7\u7ebf&#xff08;A\u548cB\u6216&#043;\u548c-&#xff09;<\/li>\n<li>\u7535\u5e73\u6807\u51c6&#xff1a;\u903b\u8f91\u201c1\u201d\u65f6&#xff0c;A\u76f8\u5bf9\u4e8eB\u4e3a\u6b63&#xff0c;\u903b\u8f91\u201c0\u201d\u65f6\u76f8\u53cd&#xff0c;\u5178\u578b\u5dee\u5206\u7535\u538b\u8303\u56f4\u4e3a\u00b1200mV\u81f3\u00b12V<\/li>\n<li>\u62d3\u6251\u7ed3\u6784&#xff1a;\u603b\u7ebf\u578b\u6216\u661f\u578b&#xff08;\u901a\u8fc7\u6709\u6e90\u6216\u65e0\u6e90\u8f6c\u6362\u5668&#xff09;<\/li>\n<li>\u901a\u4fe1\u8ddd\u79bb&#xff1a;\u957f\u8fbe1200\u7c73&#xff08;\u53d6\u51b3\u4e8e\u5e03\u7ebf\u8d28\u91cf\u548c\u6ce2\u7279\u7387&#xff09;<\/li>\n<li>\u901a\u8baf\u901f\u7387&#xff1a;\u6700\u9ad8\u53ef\u8fbe10Mbps&#xff0c;\u4f46\u5e38\u7528\u901f\u7387\u901a\u5e38\u57289600bps\u81f3115200bps\u4e4b\u95f4<\/li>\n<li>\u6297\u5e72\u6270\u80fd\u529b&#xff1a;\u5f3a&#xff0c;\u56e0\u4e3a\u91c7\u7528\u5dee\u5206\u4fe1\u53f7\u4f20\u8f93<\/li>\n<li>\u7ec4\u7f51\u529f\u80fd&#xff1a;\u5f3a\u5927&#xff0c;\u53ef\u652f\u6301\u591a\u8282\u70b9\u7f51\u7edc<\/li>\n<li>\u63a5\u53e3\u5b89\u5168\u6027&#xff1a;\u63a5\u53e3\u7535\u5e73\u4f4e&#xff0c;\u76f8\u5bf9\u5176\u4ed6\u6807\u51c6&#xff08;\u5982RS232&#xff09;\u66f4\u4e0d\u5bb9\u6613\u635f\u574f\u82af\u7247<\/li>\n<\/ul>\n<p>\u901a\u8fc7\u4e0a\u8ff0\u7279\u6027&#xff0c;RS485\u4e0d\u4ec5\u9002\u5408\u957f\u8ddd\u79bb\u3001\u9ad8\u901f\u7387\u4f20\u8f93&#xff0c;\u800c\u4e14\u5177\u5907\u826f\u597d\u7684\u566a\u58f0\u6291\u5236\u80fd\u529b\u548c\u5927\u89c4\u6a21\u7f51\u7edc\u90e8\u7f72\u80fd\u529b\u3002 <img decoding=\"async\" src=\"https:\/\/www.wsisp.com\/helps\/wp-content\/uploads\/2025\/06\/20250611005509-6848d3edcd4c0.png\" alt=\"\u5728\u8fd9\u91cc\u63d2\u5165\u56fe\u7247\u63cf\u8ff0\" \/> \u5728RS485\u603b\u7ebf\u8fde\u63a5\u4e2d&#xff0c;\u7ec4\u4ef6\u4e4b\u95f4\u7684\u8fde\u63a5\u548c\u4f5c\u7528\u5982\u4e0b&#xff1a;<\/p>\n<li>\n<p>CPU&#xff1a;\u4e2d\u592e\u5904\u7406\u5668&#xff0c;\u8d1f\u8d23\u63a7\u5236\u6574\u4e2a\u7cfb\u7edf\u7684\u8fd0\u884c\u548c\u6570\u636e\u5904\u7406\u3002<\/p>\n<\/li>\n<li>\n<p>UART\u63a7\u5236\u5668&#xff1a;\u96c6\u6210\u5728CPU\u5185\u90e8\u6216\u5916\u90e8\u7684\u901a\u7528\u5f02\u6b65\u6536\u53d1\u4f20\u8f93\u5668&#xff0c;\u7528\u4e8e\u751f\u6210\u548c\u89e3\u6790\u4e32\u884c\u901a\u4fe1\u6570\u636e\u6d41\u3002<\/p>\n<\/li>\n<li>\n<p>TXD\/RXD\u8fde\u63a5&#xff1a;<\/p>\n<ul>\n<li>TXD&#xff08;Transmit Data&#xff09;&#xff1a;UART\u63a7\u5236\u5668\u7684\u53d1\u9001\u6570\u636e\u7ebf&#xff0c;\u901a\u5e38\u8fde\u63a5\u5230485\u6536\u53d1\u5668\u7684\u63a5\u6536\u7aef&#xff08;\u5982DE\/RE\u5f15\u811a\u7981\u80fd\u65f6\u7684\u63a5\u6536\u7aef\u6216RO\u5f15\u811a&#xff09;\u3002<\/li>\n<li>RXD&#xff08;Receive Data&#xff09;&#xff1a;UART\u63a7\u5236\u5668\u7684\u63a5\u6536\u6570\u636e\u7ebf&#xff0c;\u901a\u5e38\u8fde\u63a5\u5230485\u6536\u53d1\u5668\u7684\u53d1\u9001\u7aef&#xff08;\u5982DI\u5f15\u811a&#xff09;\u3002<\/li>\n<\/ul>\n<\/li>\n<li>\n<p>485\u6536\u53d1\u5668&#xff1a;<\/p>\n<ul>\n<li>\u5982SP3485\u3001TP8485E\u3001MAX485\u7b49&#xff0c;\u8fd9\u7c7b\u82af\u7247\u7528\u4e8e\u5b9e\u73b0TTL\u7535\u5e73\u4e0eRS485\u5dee\u5206\u4fe1\u53f7\u7535\u5e73\u4e4b\u95f4\u7684\u8f6c\u6362&#xff0c;\u5e76\u5177\u5907\u6536\u53d1\u63a7\u5236\u529f\u80fd\u3002<\/li>\n<li>DE&#xff08;Driver Enable&#xff09;\/RE&#xff08;Receiver Enable&#xff09;&#xff1a;\u63a7\u5236485\u6536\u53d1\u5668\u5de5\u4f5c\u5728\u53d1\u9001\u6216\u63a5\u6536\u6a21\u5f0f&#xff0c;\u9632\u6b62\u5728\u540c\u4e00\u65f6\u523b\u65e2\u53d1\u9001\u53c8\u63a5\u6536\u5bfc\u81f4\u51b2\u7a81\u3002<\/li>\n<li>DI&#xff08;Data Input&#xff09;&#xff1a;\u63a5\u6536\u6765\u81eaUART\u7684TTL\u7535\u5e73\u4fe1\u53f7&#xff0c;\u5e76\u8f6c\u6362\u4e3aRS485\u5dee\u5206\u4fe1\u53f7\u3002<\/li>\n<li>RO&#xff08;Receiver Output&#xff09;&#xff1a;\u5c06\u63a5\u6536\u5230\u7684RS485\u5dee\u5206\u4fe1\u53f7\u8f6c\u6362\u4e3aTTL\u7535\u5e73&#xff0c;\u53d1\u9001\u7ed9UART\u3002<\/li>\n<\/ul>\n<\/li>\n<li>\n<p>485_A\/485_B&#xff1a;<\/p>\n<ul>\n<li>\u8fd9\u662fRS485\u603b\u7ebf\u7684\u5dee\u5206\u4fe1\u53f7\u7ebf&#xff0c;485_A\u548c485_B\u4e24\u6839\u7ebf\u901a\u8fc7\u53cc\u7ede\u7ebf\u8fde\u63a5\u5230\u6240\u6709\u7684RS485\u8bbe\u5907&#xff0c;\u786e\u4fdd\u4fe1\u53f7\u8d28\u91cf\u826f\u597d\u3002<\/li>\n<\/ul>\n<\/li>\n<li>\n<p>\u5339\u914d\u7535\u963b&#xff1a;<\/p>\n<ul>\n<li>\u5728485_A\u548c485_B\u7684\u4e24\u7aef&#xff08;\u6216\u9760\u8fd1\u8bbe\u5907\u7aef&#xff09;\u901a\u5e38\u4f1a\u5e76\u8054\u4e00\u4e2a120\u6b27\u59c6\u5de6\u53f3\u7684\u7ec8\u7aef\u7535\u963b&#xff0c;\u76ee\u7684\u662f\u5438\u6536\u4fe1\u53f7\u53cd\u5c04&#xff0c;\u786e\u4fddRS485\u603b\u7ebf\u7684\u7a33\u5b9a\u6027&#xff0c;\u6291\u5236\u566a\u58f0&#xff0c;\u589e\u5f3a\u4fe1\u53f7\u8d28\u91cf\u3002<\/li>\n<\/ul>\n<\/li>\n<p>\u603b\u4e4b&#xff0c;\u901a\u8fc7\u4e0a\u8ff0\u90e8\u4ef6\u7684\u8fde\u63a5\u548c\u534f\u540c\u5de5\u4f5c&#xff0c;CPU\u5f97\u4ee5\u901a\u8fc7UART\u63a7\u5236\u5668\u4e0eRS485\u603b\u7ebf\u4e0a\u7684\u5176\u5b83\u8bbe\u5907\u8fdb\u884c\u53ef\u9760\u7684\u6570\u636e\u4ea4\u6362\u3002 <img decoding=\"async\" src=\"https:\/\/www.wsisp.com\/helps\/wp-content\/uploads\/2025\/06\/20250611005510-6848d3ee33368.png\" alt=\"\u5728\u8fd9\u91cc\u63d2\u5165\u56fe\u7247\u63cf\u8ff0\" \/> RS485\u901a\u4fe1\u7535\u8def\u4e2d\u5404\u5f15\u811a\u7684\u529f\u80fd\u4ee5\u53ca\u4fe1\u53f7\u4f20\u8f93\u89c4\u5219\u5982\u4e0b&#xff1a;<\/p>\n<ul>\n<li>\n<p>RO (Receiver Output): RO\u662f\u63a5\u6536\u5668\u8f93\u51fa\u7aef&#xff0c;\u5f53RS485\u603b\u7ebf\u4e0a\u7684\u5dee\u5206\u4fe1\u53f7\u6ee1\u8db3\u4e00\u5b9a\u7684\u9608\u503c\u6761\u4ef6\u65f6&#xff0c;RO\u4f1a\u6839\u636e\u63a5\u6536\u5230\u7684\u5dee\u5206\u4fe1\u53f7\u8f93\u51fa\u5bf9\u5e94\u7684\u903b\u8f91\u7535\u5e73\u3002\u5177\u4f53\u6765\u8bf4&#xff1a;<\/p>\n<ul>\n<li>\u5982\u679c A &#8211; B \u7684\u7535\u538b\u5dee\u5927\u4e8e\u7b49\u4e8e &#043;0.2V&#xff0c;\u8868\u660e\u603b\u7ebf\u4e0a\u63a5\u6536\u5230\u4e86\u903b\u8f91\u201c1\u201d&#xff0c;\u56e0\u6b64RO\u8f93\u51fa\u9ad8\u7535\u5e73&#xff08;\u903b\u8f91\u201c1\u201d&#xff09;\u3002<\/li>\n<li>\u5982\u679c A &#8211; B \u7684\u7535\u538b\u5dee\u5c0f\u4e8e\u7b49\u4e8e -0.2V&#xff0c;\u8868\u660e\u603b\u7ebf\u4e0a\u63a5\u6536\u5230\u4e86\u903b\u8f91\u201c0\u201d&#xff0c;\u6b64\u65f6RO\u8f93\u51fa\u4f4e\u7535\u5e73&#xff08;\u903b\u8f91\u201c0\u201d&#xff09;\u3002<\/li>\n<\/ul>\n<\/li>\n<li>\n<p>RE (Receiver Enable): RE\u662f\u63a5\u6536\u5668\u4f7f\u80fd\u7aef&#xff0c;\u4f4e\u7535\u5e73\u6709\u6548\u3002\u5f53RE\u4e3a\u4f4e\u7535\u5e73\u65f6&#xff0c;\u5141\u8bb8\u63a5\u6536\u5668\u5de5\u4f5c&#xff0c;\u53ef\u4ee5\u6b63\u5e38\u63a5\u6536\u603b\u7ebf\u4e0a\u7684\u6570\u636e&#xff1b;\u53cd\u4e4b&#xff0c;\u5f53RE\u4e3a\u9ad8\u7535\u5e73\u65f6&#xff0c;\u63a5\u6536\u5668\u88ab\u7981\u6b62\u63a5\u6536\u6570\u636e\u3002<\/p>\n<\/li>\n<li>\n<p>DE (Driver Enable): DE\u662f\u9a71\u52a8\u5668\u4f7f\u80fd\u7aef&#xff0c;\u9ad8\u7535\u5e73\u6709\u6548\u3002\u5f53DE\u4e3a\u9ad8\u7535\u5e73\u65f6&#xff0c;\u5141\u8bb8\u9a71\u52a8\u5668\u5de5\u4f5c&#xff0c;\u53ef\u4ee5\u5411\u603b\u7ebf\u53d1\u9001\u6570\u636e&#xff1b;\u53cd\u4e4b&#xff0c;\u5f53DE\u4e3a\u4f4e\u7535\u5e73\u65f6&#xff0c;\u9a71\u52a8\u5668\u505c\u6b62\u53d1\u9001\u6570\u636e&#xff0c;\u8fdb\u5165\u9ad8\u963b\u6001&#xff0c;\u4e0d\u5f71\u54cd\u603b\u7ebf\u4e0a\u7684\u5176\u4ed6\u8bbe\u5907\u901a\u4fe1\u3002<\/p>\n<\/li>\n<li>\n<p>DI (Driver Input): DI\u662f\u9a71\u52a8\u5668\u8f93\u5165\u7aef&#xff0c;\u4e0e\u5fae\u63a7\u5236\u5668\u7684TTL\/CMOS\u7535\u5e73\u8f93\u51fa\u76f8\u8fde&#xff0c;\u7528\u4e8e\u51b3\u5b9a\u9a71\u52a8\u5668\u8981\u53d1\u9001\u7684\u6570\u636e&#xff1a;<\/p>\n<ul>\n<li>\u5f53DI\u4e3a\u4f4e\u7535\u5e73\u65f6&#xff0c;\u9a71\u52a8\u5668\u4f1a\u8ba9A\u7ebf\u53d8\u4f4e&#xff0c;B\u7ebf\u53d8\u9ad8&#xff0c;\u4ece\u800c\u5728\u603b\u7ebf\u4e0a\u5f62\u6210\u903b\u8f91\u201c0\u201d\u7684\u5dee\u5206\u4fe1\u53f7\u3002<\/li>\n<li>\u5f53DI\u4e3a\u9ad8\u7535\u5e73\u65f6&#xff0c;\u9a71\u52a8\u5668\u4f1a\u8ba9A\u7ebf\u53d8\u9ad8&#xff0c;B\u7ebf\u53d8\u4f4e&#xff0c;\u4ece\u800c\u5728\u603b\u7ebf\u4e0a\u5f62\u6210\u903b\u8f91\u201c1\u201d\u7684\u5dee\u5206\u4fe1\u53f7\u3002<\/li>\n<\/ul>\n<\/li>\n<li>\n<p>A \u548c B: \u8fd9\u662f\u5bf9\u79f0\u7684\u5dee\u5206\u4fe1\u53f7\u7ebf&#xff0c;A\u548cB\u901a\u5e38\u901a\u8fc7\u53cc\u7ede\u7ebf\u8fde\u63a5&#xff0c;\u5171\u540c\u6784\u6210RS485\u901a\u4fe1\u7684\u7269\u7406\u5c42\u57fa\u7840\u3002<\/p>\n<\/li>\n<\/ul>\n<p>\u5173\u4e8eR19\u548cR22\u8fd9\u4e24\u4e2a\u504f\u7f6e\u7535\u963b\u7684\u4f5c\u7528&#xff1a; \u5728\u67d0\u4e9b\u8bbe\u8ba1\u4e2d&#xff0c;\u4e3a\u4e86\u907f\u514d\u603b\u7ebf\u5728\u6ca1\u6709\u6570\u636e\u4f20\u8f93\u65f6\u5904\u4e8e\u4e0d\u786e\u5b9a\u72b6\u6001&#xff0c;\u4f1a\u5728A\u7ebf\u548cB\u7ebf\u4e4b\u95f4\u8bbe\u7f6e\u504f\u7f6e\u7535\u963b&#xff08;\u5982R19\u548cR22&#xff09;&#xff0c;\u4f7f\u5f97\u5728\u603b\u7ebf\u7a7a\u95f2\u65f6&#xff0c;A\u7ebf\u4e0eB\u7ebf\u4e4b\u95f4\u6709\u4e00\u4e2a\u56fa\u5b9a\u7684\u6b63\u5411\u504f\u79fb\u7535\u538b&#xff08;\u5927\u4e8e0.2V&#xff09;\u3002\u8fd9\u6837\u505a\u7684\u76ee\u7684\u662f\u786e\u4fdd\u5373\u4f7f\u5728\u6ca1\u6709\u660e\u786e\u6570\u636e\u4fe1\u53f7\u7684\u60c5\u51b5\u4e0b&#xff0c;\u4e5f\u4e0d\u4f1a\u56e0\u4e3a\u566a\u58f0\u6216\u5176\u4ed6\u539f\u56e0\u8bef\u5224\u4e3a\u6709\u6548\u7684\u903b\u8f91\u4fe1\u53f7&#xff0c;\u589e\u5f3a\u4e86\u901a\u4fe1\u7684\u53ef\u9760\u6027\u3002\u5728\u5b9e\u9645\u5e94\u7528\u4e2d&#xff0c;\u8fd9\u4e9b\u504f\u7f6e\u7535\u963b\u7684\u9009\u62e9\u548c\u662f\u5426\u9700\u8981\u53d6\u51b3\u4e8e\u5177\u4f53\u7684\u786c\u4ef6\u8bbe\u8ba1\u9700\u6c42\u548c\u6240\u4f7f\u7528\u7684RS485\u6536\u53d1\u5668\u82af\u7247\u7684\u7279\u6027\u3002 <img decoding=\"async\" src=\"https:\/\/www.wsisp.com\/helps\/wp-content\/uploads\/2025\/06\/20250611005510-6848d3eea2370.png\" alt=\"\u5728\u8fd9\u91cc\u63d2\u5165\u56fe\u7247\u63cf\u8ff0\" \/> 485\u901a\u4fe1\u6ce2\u5f62\u56fe\u793a\u4f8b&#xff1a;<\/p>\n<p>\u5728485\u901a\u4fe1\u4e2d&#xff0c;\u53d1\u9001\u7aef\u548c\u63a5\u6536\u7aef\u7684\u4fe1\u53f7\u6ce2\u5f62\u5982\u4e0b&#xff1a;<\/p>\n<p>\u53d1\u9001\u7aef\u6ce2\u5f62\u56fe\u793a&#xff1a;<\/p>\n<ul>\n<li>\n<p>\u53d1\u9001\u903b\u8f911\u65f6&#xff1a;<\/p>\n<ul>\n<li>A\u7ebf\u7684\u6ce2\u5f62\u663e\u793a\u4e3a\u9ad8\u7535\u5e73&#xff08;\u63a5\u8fd1\u7535\u6e90\u7535\u538b&#xff09;\u3002<\/li>\n<li>B\u7ebf\u7684\u6ce2\u5f62\u663e\u793a\u4e3a\u4f4e\u7535\u5e73&#xff08;\u63a5\u8fd1\u63a5\u5730\u7535\u5e73&#xff09;\u3002<\/li>\n<\/ul>\n<\/li>\n<li>\n<p>\u53d1\u9001\u903b\u8f910\u65f6&#xff1a;<\/p>\n<ul>\n<li>A\u7ebf\u7684\u6ce2\u5f62\u663e\u793a\u4e3a\u4f4e\u7535\u5e73\u3002<\/li>\n<li>B\u7ebf\u7684\u6ce2\u5f62\u663e\u793a\u4e3a\u9ad8\u7535\u5e73\u3002<\/li>\n<\/ul>\n<\/li>\n<\/ul>\n<p>\u63a5\u6536\u7aef\u6ce2\u5f62\u56fe\u793a&#xff1a;<\/p>\n<ul>\n<li>\n<p>\u5224\u65ad\u903b\u8f911\u65f6&#xff1a;<\/p>\n<ul>\n<li>A\u7ebf\u7684\u7535\u538b\u9ad8\u4e8eB\u7ebf\u7535\u538b\u81f3\u5c110.2V\u4ee5\u4e0a&#xff0c;\u4f8b\u5982A\u7ebf\u4e3a3.5V&#xff0c;B\u7ebf\u4e3a1V&#xff0c;\u5219(A-B)&#061;2.5V\u2265&#043;0.2V\u3002<\/li>\n<li>\u5728\u8fd9\u79cd\u60c5\u51b5\u4e0b&#xff0c;\u63a5\u6536\u5668\u8f93\u51faRO\u4f1a\u88ab\u7f6e\u4e3a\u9ad8\u7535\u5e73&#xff0c;\u8868\u793a\u63a5\u6536\u5230\u7684\u662f\u903b\u8f91\u201c1\u201d\u3002<\/li>\n<\/ul>\n<\/li>\n<li>\n<p>\u5224\u65ad\u903b\u8f910\u65f6&#xff1a;<\/p>\n<ul>\n<li>B\u7ebf\u7684\u7535\u538b\u9ad8\u4e8eA\u7ebf\u7535\u538b\u81f3\u5c110.2V\u4ee5\u4e0a&#xff0c;\u4f8b\u5982B\u7ebf\u4e3a3.5V&#xff0c;A\u7ebf\u4e3a1V&#xff0c;\u5219(B-A)&#061;-2.5V\u2264-0.2V\u3002<\/li>\n<li>\u5728\u8fd9\u79cd\u60c5\u51b5\u4e0b&#xff0c;\u63a5\u6536\u5668\u8f93\u51faRO\u4f1a\u88ab\u7f6e\u4e3a\u4f4e\u7535\u5e73&#xff0c;\u8868\u793a\u63a5\u6536\u5230\u7684\u662f\u903b\u8f91\u201c0\u201d\u3002<\/li>\n<\/ul>\n<\/li>\n<\/ul>\n<p>485\u901a\u4fe1\u91c7\u7528\u5dee\u5206\u4fe1\u53f7\u4f20\u8f93&#xff0c;\u8fd9\u79cd\u8bbe\u8ba1\u6709\u6548\u5730\u63d0\u9ad8\u4e86\u6297\u5e72\u6270\u80fd\u529b&#xff0c;\u5141\u8bb8\u591a\u4e2a\u8bbe\u5907\u5171\u4eab\u76f8\u540c\u7684\u901a\u4fe1\u603b\u7ebf&#xff0c;\u5e76\u4e14\u80fd\u591f\u5728\u957f\u8ddd\u79bb\u548c\u6076\u52a3\u73af\u5883\u4e0b\u4fdd\u6301\u7a33\u5b9a\u7684\u901a\u4fe1\u3002\u5728\u5b9e\u9645\u7684\u6ce2\u5f62\u56fe\u4e2d&#xff0c;\u53ef\u4ee5\u770b\u5230A\u7ebf\u548cB\u7ebf\u7684\u6ce2\u5f62\u4e92\u8865&#xff0c;\u5e76\u4e14\u6839\u636e\u4ed6\u4eec\u7684\u7535\u538b\u5dee\u6765\u786e\u5b9a\u4f20\u8f93\u7684\u903b\u8f91\u503c\u3002 <img decoding=\"async\" src=\"https:\/\/www.wsisp.com\/helps\/wp-content\/uploads\/2025\/06\/20250611005510-6848d3eee706d.png\" alt=\"\u5728\u8fd9\u91cc\u63d2\u5165\u56fe\u7247\u63cf\u8ff0\" \/><\/p>\n<h2><span id=\"click_jump2\"><font color=\"Blue\">\u4e8c\u3001RS485\u76f8\u5173HAL\u5e93\u9a71\u52a8\u4ecb\u7ecd<\/font><\/span><\/h2>\n<p><img decoding=\"async\" src=\"https:\/\/www.wsisp.com\/helps\/wp-content\/uploads\/2025\/06\/20250611005511-6848d3ef847fa.png\" alt=\"\u5728\u8fd9\u91cc\u63d2\u5165\u56fe\u7247\u63cf\u8ff0\" \/> \u5b9e\u9645\u4e0a&#xff0c;\u5bf9\u4e8eRS485\u901a\u4fe1&#xff0c;STM32\u7684HAL\u5e93\u5e76\u6ca1\u6709\u76f4\u63a5\u63d0\u4f9b\u540d\u4e3aHAL_RS485_xxx\u7684\u7279\u5b9a\u51fd\u6570&#xff0c;\u800c\u662f\u901a\u8fc7\u914d\u7f6e\u901a\u7528\u7684UART\u63a5\u53e3\u6765\u5b9e\u73b0RS485\u901a\u4fe1\u3002\u5728STM32 HAL\u5e93\u4e2d&#xff0c;\u4f7f\u7528\u901a\u7528\u7684UART\u63a5\u53e3\u51fd\u6570\u6765\u9a71\u52a8RS485&#xff0c;\u540c\u65f6\u9700\u8981\u642d\u914d\u989d\u5916\u7684RS485\u6536\u53d1\u5668&#xff08;\u5982SP3485\u3001MAX485\u7b49&#xff09;\u8fdb\u884c\u7535\u5e73\u8f6c\u6362\u3002\u4ee5\u4e0b\u662f\u4e0eRS485\u901a\u4fe1\u5bc6\u5207\u76f8\u5173\u7684HAL\u5e93\u51fd\u6570\u53ca\u5176\u529f\u80fd\u63cf\u8ff0&#xff1a;<\/p>\n<ul>\n<li>\n<p>__HAL_RCC_USARTx_CLK_ENABLE(\u2026)&#xff1a;<\/p>\n<ul>\n<li>\u5173\u8054\u5bc4\u5b58\u5668&#xff1a;RCC_APBxPeriphClockCmd()\u51fd\u6570\u95f4\u63a5\u5f71\u54cdUSARTx\u7684\u65f6\u949f\u4f7f\u80fd\u5bc4\u5b58\u5668&#xff08;\u5982APB1ENR\/APB2ENR&#xff09;\u3002<\/li>\n<li>\u529f\u80fd\u63cf\u8ff0&#xff1a;\u4f7f\u80fd\u6307\u5b9aUSART&#xff08;\u4f8b\u5982USART1\u3001USART2\u7b49&#xff09;\u7684\u65f6\u949f&#xff0c;\u8fd9\u662f\u4f7f\u7528\u4efb\u4f55USART\u529f\u80fd\u4e4b\u524d\u7684\u5fc5\u8981\u6b65\u9aa4\u3002<\/li>\n<\/ul>\n<\/li>\n<li>\n<p>HAL_UART_Init(\u2026)&#xff1a;<\/p>\n<ul>\n<li>\u5173\u8054\u5bc4\u5b58\u5668&#xff1a;USART_CR1\u3001USART_CR2\u3001USART_CR3\u7b49\u3002<\/li>\n<li>\u529f\u80fd\u63cf\u8ff0&#xff1a;\u521d\u59cb\u5316\u6307\u5b9a\u7684USART\u5916\u8bbe&#xff0c;\u914d\u7f6e\u8bf8\u5982\u6ce2\u7279\u7387\u3001\u6570\u636e\u4f4d\u6570\u3001\u505c\u6b62\u4f4d\u3001\u5947\u5076\u6821\u9a8c\u3001\u6a21\u5f0f&#xff08;\u5982\u5f02\u6b65\u6a21\u5f0f&#xff09;\u3001\u786c\u4ef6\u6d41\u63a7\u5236\u7b49\u5404\u79cd\u53c2\u6570\u3002<\/li>\n<\/ul>\n<\/li>\n<li>\n<p>__HAL_UART_ENABLE_IT(\u2026)&#xff1a;<\/p>\n<ul>\n<li>\u5173\u8054\u5bc4\u5b58\u5668&#xff1a;USART_CR1&#xff08;\u4ee5\u53caUSART_CR2\u548cUSART_CR3&#xff0c;\u89c6\u4e2d\u65ad\u7c7b\u578b\u800c\u5b9a&#xff09;\u3002<\/li>\n<li>\u529f\u80fd\u63cf\u8ff0&#xff1a;\u4f7f\u80fdUSART\u7684\u76f8\u5173\u4e2d\u65ad&#xff0c;\u5982\u63a5\u6536\u6570\u636e\u5bc4\u5b58\u5668\u975e\u7a7a\u4e2d\u65ad&#xff08;RXNE&#xff09;\u3001\u53d1\u9001\u6570\u636e\u5bc4\u5b58\u5668\u4e3a\u7a7a\u4e2d\u65ad&#xff08;TXE&#xff09;\u7b49&#xff0c;\u8fd9\u5bf9RS485\u901a\u4fe1\u4e2d\u7684\u6570\u636e\u6536\u53d1\u4e2d\u65ad\u5904\u7406\u975e\u5e38\u91cd\u8981\u3002<\/li>\n<\/ul>\n<\/li>\n<li>\n<p>HAL_UART_Receive(\u2026)&#xff1a;<\/p>\n<ul>\n<li>\u5173\u8054\u5bc4\u5b58\u5668&#xff1a;USART_DR&#xff08;\u6570\u636e\u5bc4\u5b58\u5668&#xff09;\u3002<\/li>\n<li>\u529f\u80fd\u63cf\u8ff0&#xff1a;\u901a\u8fc7DMA\u6216\u4e2d\u65ad\u65b9\u5f0f\u4eceUSART\u63a5\u6536\u6570\u636e&#xff0c;\u9002\u7528\u4e8eRS485\u63a5\u6536\u6570\u636e\u9636\u6bb5\u3002<\/li>\n<\/ul>\n<\/li>\n<li>\n<p>HAL_UART_Transmit(\u2026)&#xff1a;<\/p>\n<ul>\n<li>\u5173\u8054\u5bc4\u5b58\u5668&#xff1a;USART_DR\u3002<\/li>\n<li>\u529f\u80fd\u63cf\u8ff0&#xff1a;\u901a\u8fc7DMA\u6216\u4e2d\u65ad\u65b9\u5f0f\u5411USART\u53d1\u9001\u6570\u636e&#xff0c;\u9002\u7528\u4e8eRS485\u53d1\u9001\u6570\u636e\u9636\u6bb5\u3002<\/li>\n<\/ul>\n<\/li>\n<li>\n<p>__HAL_UART_GET_FLAG(\u2026)&#xff1a;<\/p>\n<ul>\n<li>\u5173\u8054\u5bc4\u5b58\u5668&#xff1a;USART_SR&#xff08;\u72b6\u6001\u5bc4\u5b58\u5668&#xff09;\u3002<\/li>\n<li>\u529f\u80fd\u63cf\u8ff0&#xff1a;\u67e5\u8be2USART\u5f53\u524d\u7684\u72b6\u6001\u6807\u5fd7\u4f4d&#xff0c;\u4f8b\u5982\u5224\u65ad\u662f\u5426\u5df2\u5b8c\u6210\u6570\u636e\u53d1\u9001&#xff08;TC&#061;Transmission Complete&#xff09;\u3001\u662f\u5426\u63a5\u6536\u5230\u65b0\u7684\u6570\u636e&#xff08;RXNE&#061;Received Data Not Empty&#xff09;\u7b49\u3002<\/li>\n<\/ul>\n<\/li>\n<\/ul>\n<p>\u9488\u5bf9RS485\u901a\u4fe1&#xff0c;\u8fd8\u9700\u914d\u7f6eRS485\u6536\u53d1\u5668\u7684\u63a7\u5236\u5f15\u811a&#xff08;\u5982DE\/RE&#xff09;\u6765\u5207\u6362RS485\u6a21\u5f0f&#xff08;\u53d1\u9001\u6216\u63a5\u6536&#xff09;\u3002\u8fd9\u90e8\u5206\u901a\u5e38\u4e0d\u5728HAL\u5e93\u63d0\u4f9b\u7684UART\u51fd\u6570\u5185&#xff0c;\u9700\u8981\u5728\u5e94\u7528\u5c42\u624b\u52a8\u63a7\u5236\u6216\u8005\u901a\u8fc7GPIO\u4e2d\u65ad\u7b49\u65b9\u5f0f\u8fdb\u884c\u7ba1\u7406\u3002\u6b64\u5916&#xff0c;\u4e3a\u4e86\u6b63\u786e\u8fdb\u884cRS485\u901a\u4fe1&#xff0c;\u8fd8\u8981\u8003\u8651\u603b\u7ebf\u7684\u4fe1\u53f7\u7ebf\u8fde\u63a5\u3001\u7ec8\u7aef\u7535\u963b\u5339\u914d\u7b49\u95ee\u9898\u3002<\/p>\n<h2><span id=\"click_jump3\"><font color=\"Blue\">\u4e09\u3001RS485\u914d\u7f6e\u6b65\u9aa4<\/font><\/span><\/h2>\n<p><img decoding=\"async\" src=\"https:\/\/www.wsisp.com\/helps\/wp-content\/uploads\/2025\/06\/20250611005511-6848d3efb6684.png\" alt=\"\u5728\u8fd9\u91cc\u63d2\u5165\u56fe\u7247\u63cf\u8ff0\" \/> RS485\u914d\u7f6e\u6b65\u9aa4&#xff0c;\u57fa\u4e8eSTM32 HAL\u5e93\u8fdb\u884c&#xff0c;\u53ef\u4ee5\u7ec6\u5316\u4e3a\u4ee5\u4e0b\u6b65\u9aa4&#xff1a;<\/p>\n<li>\n<p>\u914d\u7f6e\u4e32\u53e3\u5de5\u4f5c\u53c2\u6570<\/p>\n<ul>\n<li>\u4f7f\u7528HAL_UART_Init()\u51fd\u6570\u521d\u59cb\u5316\u4e32\u53e3\u3002\u5728\u8fd9\u4e2a\u51fd\u6570\u4e2d&#xff0c;\u4f60\u9700\u8981\u63d0\u4f9b\u4e00\u4e2a\u6307\u5411UART_HandleTypeDef\u7ed3\u6784\u4f53\u7684\u6307\u9488&#xff0c;\u5e76\u5728\u7ed3\u6784\u4f53\u5185\u586b\u5165\u4e32\u53e3\u7684\u5de5\u4f5c\u53c2\u6570&#xff0c;\u5982\u6ce2\u7279\u7387\u3001\u6570\u636e\u4f4d\u6570\u3001\u505c\u6b62\u4f4d\u6570\u3001\u5947\u5076\u6821\u9a8c\u7b49\u3002<\/li>\n<\/ul>\n<\/li>\n<li>\n<p>\u4e32\u53e3\u5e95\u5c42\u521d\u59cb\u5316<\/p>\n<ul>\n<li>\u914d\u7f6e\u4e0e\u4e32\u53e3\u76f8\u5173\u7684GPIO\u5f15\u811a&#xff0c;\u8bbe\u7f6e\u5b83\u4eec\u4e3a\u590d\u7528\u529f\u80fd\u6a21\u5f0f&#xff0c;\u5e76\u914d\u7f6e\u4e3aAF&#xff08;Alternate Function&#xff09;\u5bf9\u5e94\u7684\u4e32\u53e3\u529f\u80fd\u3002<\/li>\n<li>\u914d\u7f6eNVIC&#xff08;Nested Vectored Interrupt Controller&#xff09;&#xff0c;\u4e3a\u4e32\u53e3\u7684\u4e2d\u65ad\u8bf7\u6c42\u5206\u914d\u4f18\u5148\u7ea7&#xff0c;\u5e76\u5173\u8054\u4e2d\u65ad\u670d\u52a1\u51fd\u6570\u3002<\/li>\n<li>\u4f7f\u80fd\u4e32\u53e3\u5bf9\u5e94\u7684\u65f6\u949f&#xff0c;\u901a\u8fc7__HAL_RCC_USARTx_CLK_ENABLE()\u51fd\u6570\u542f\u7528\u76f8\u5e94USART\u7684\u65f6\u949f\u3002<\/li>\n<\/ul>\n<\/li>\n<li>\n<p>\u5f00\u542f\u4e32\u53e3\u5f02\u6b65\u63a5\u6536\u4e2d\u65ad<\/p>\n<ul>\n<li>\u901a\u8fc7__HAL_UART_ENABLE_IT()\u51fd\u6570\u542f\u7528\u4e32\u53e3\u7684\u63a5\u6536\u4e2d\u65ad&#xff0c;\u4f8b\u5982\u542f\u7528UART_IT_RXNE&#xff0c;\u8fd9\u6837\u5f53\u63a5\u6536\u6570\u636e\u5bc4\u5b58\u5668\u975e\u7a7a\u65f6&#xff0c;\u4f1a\u4ea7\u751f\u4e2d\u65ad\u8bf7\u6c42\u3002<\/li>\n<\/ul>\n<\/li>\n<li>\n<p>\u8bbe\u7f6e\u4e2d\u65ad\u4f18\u5148\u7ea7\u5e76\u4f7f\u80fd\u4e2d\u65ad<\/p>\n<ul>\n<li>\u4f7f\u7528HAL_NVIC_SetPriority()\u51fd\u6570\u8bbe\u7f6e\u4e32\u53e3\u4e2d\u65ad\u7684\u670d\u52a1\u4f18\u5148\u7ea7\u3002<\/li>\n<li>\u901a\u8fc7HAL_NVIC_EnableIRQ()\u51fd\u6570\u4f7f\u80fd\u4e32\u53e3\u5bf9\u5e94\u7684\u4e2d\u65ad\u8bf7\u6c42&#xff0c;\u4f8b\u5982USART1_IRQn\u3002<\/li>\n<\/ul>\n<\/li>\n<li>\n<p>\u7f16\u5199\u4e2d\u65ad\u670d\u52a1\u51fd\u6570<\/p>\n<ul>\n<li>\u7f16\u5199\u4e32\u53e3\u4e2d\u65ad\u670d\u52a1\u51fd\u6570&#xff0c;\u5982USARTx_IRQHandler()&#xff08;\u5176\u4e2dx\u4ee3\u8868\u5177\u4f53\u7684\u4e32\u53e3\u53f7&#xff0c;\u5982USART1\u3001USART2\u7b49&#xff09;\u3002<\/li>\n<li>\u5728\u4e2d\u65ad\u670d\u52a1\u51fd\u6570\u5185\u90e8&#xff0c;\u8c03\u7528HAL_UART_IRQHandler()\u51fd\u6570\u6765\u5904\u7406\u4e2d\u65ad&#xff0c;\u7279\u522b\u662f\u5982\u679c\u6709\u6570\u636e\u63a5\u6536&#xff0c;HAL_UART_Receive_IT()\u6216HAL_UART_Receive_DMA()\u53ef\u7528\u4e8e\u5f02\u6b65\u63a5\u6536\u6570\u636e\u3002<\/li>\n<\/ul>\n<\/li>\n<li>\n<p>\u4e32\u53e3\u6570\u636e\u53d1\u9001<\/p>\n<ul>\n<li>\u53d1\u9001\u6570\u636e\u65f6&#xff0c;\u901a\u8fc7\u5199\u5165USART\u7684\u6570\u636e\u5bc4\u5b58\u5668&#xff08;USART_DR&#xff09;\u6765\u53d1\u9001\u6570\u636e\u3002<\/li>\n<li>\u4f7f\u7528HAL_UART_Transmit()\u51fd\u6570\u53d1\u9001\u6570\u636e&#xff0c;\u8be5\u51fd\u6570\u5728\u6570\u636e\u53d1\u9001\u5b8c\u6bd5\u540e\u4f1a\u8fd4\u56de\u6210\u529f\u6807\u5fd7&#xff0c;\u9002\u5408\u5728\u975e\u4e2d\u65ad\u6a21\u5f0f\u4e0b\u4f7f\u7528&#xff1b;\u82e5\u91c7\u7528\u4e2d\u65ad\u6a21\u5f0f\u53d1\u9001\u6570\u636e&#xff0c;\u53ef\u4f7f\u7528HAL_UART_Transmit_IT()\u6216HAL_UART_Transmit_DMA()\u51fd\u6570\u3002<\/li>\n<\/ul>\n<\/li>\n<p>\u5bf9\u4e8eRS485\u901a\u4fe1&#xff0c;\u9664\u4e86\u4e0a\u8ff0\u5e38\u89c4\u7684UART\u914d\u7f6e\u4e4b\u5916&#xff0c;\u8fd8\u9700\u989d\u5916\u63a7\u5236DE&#xff08;Driver Enable&#xff09;\u6216RE&#xff08;Receiver Enable&#xff09;\u5f15\u811a&#xff0c;\u4ee5\u5207\u6362RS485\u6536\u53d1\u5668\u7684\u5de5\u4f5c\u6a21\u5f0f\u3002\u5728\u53d1\u9001\u6570\u636e\u65f6&#xff0c;\u4f7f\u80fdDE\u5f15\u811a\u4ee5\u4fbf\u9a71\u52a8\u603b\u7ebf&#xff1b;\u5728\u63a5\u6536\u6570\u636e\u65f6&#xff0c;\u5173\u95edDE\u5f15\u811a\u5e76\u5f00\u542fRE\u5f15\u811a\u3002\u8fd9\u90e8\u5206\u63a7\u5236\u901a\u5e38\u901a\u8fc7GPIO\u8fdb\u884c\u64cd\u4f5c&#xff0c;\u5e76\u975e\u76f4\u63a5\u5728HAL\u5e93\u7684UART\u63a5\u53e3\u51fd\u6570\u5185\u5b8c\u6210\u3002<\/p>\n<h2><span id=\"click_jump4\"><font color=\"Blue\">\u56db\u3001\u7f16\u7a0b\u5b9e\u6218<\/font><\/span><\/h2>\n<p><img decoding=\"async\" src=\"https:\/\/www.wsisp.com\/helps\/wp-content\/uploads\/2025\/06\/20250611005511-6848d3eff1d4b.png\" alt=\"\u5728\u8fd9\u91cc\u63d2\u5165\u56fe\u7247\u63cf\u8ff0\" \/> <img decoding=\"async\" src=\"https:\/\/www.wsisp.com\/helps\/wp-content\/uploads\/2025\/06\/20250611005512-6848d3f010de2.png\" alt=\"\u5728\u8fd9\u91cc\u63d2\u5165\u56fe\u7247\u63cf\u8ff0\" \/><\/p>\n<h3><font color=\"Purple\">RS485\u6e90\u7801<\/font><\/h3>\n<p><font color=\"red\">rs485.c<\/font><\/p>\n<p><span class=\"token macro property\"><span class=\"token directive-hash\">#<\/span><span class=\"token directive keyword\">include<\/span> <span class=\"token string\">&#034;.\/BSP\/RS485\/rs485.h&#034;<\/span><\/span><br \/>\n<span class=\"token macro property\"><span class=\"token directive-hash\">#<\/span><span class=\"token directive keyword\">include<\/span> <span class=\"token string\">&#034;.\/SYSTEM\/delay\/delay.h&#034;<\/span><\/span><\/p>\n<p>UART_HandleTypeDef g_rs458_handler<span class=\"token punctuation\">;<\/span> <span class=\"token comment\">\/* RS485\u63a7\u5236\u53e5\u67c4(\u4e32\u53e3) *\/<\/span><\/p>\n<p><span class=\"token macro property\"><span class=\"token directive-hash\">#<\/span><span class=\"token directive keyword\">ifdef<\/span> <span class=\"token expression\">RS485_EN_RX <\/span><span class=\"token comment\">\/* \u5982\u679c\u4f7f\u80fd\u4e86\u63a5\u6536 *\/<\/span><\/span><\/p>\n<p><span class=\"token class-name\">uint8_t<\/span> g_RS485_rx_buf<span class=\"token punctuation\">[<\/span>RS485_REC_LEN<span class=\"token punctuation\">]<\/span><span class=\"token punctuation\">;<\/span> <span class=\"token comment\">\/* \u63a5\u6536\u7f13\u51b2, \u6700\u5927 RS485_REC_LEN \u4e2a\u5b57\u8282. *\/<\/span><br \/>\n<span class=\"token class-name\">uint8_t<\/span> g_RS485_rx_cnt <span class=\"token operator\">&#061;<\/span> <span class=\"token number\">0<\/span><span class=\"token punctuation\">;<\/span>            <span class=\"token comment\">\/* \u63a5\u6536\u5230\u7684\u6570\u636e\u957f\u5ea6 *\/<\/span><\/p>\n<p><span class=\"token keyword\">void<\/span> <span class=\"token function\">RS485_UX_IRQHandler<\/span><span class=\"token punctuation\">(<\/span><span class=\"token keyword\">void<\/span><span class=\"token punctuation\">)<\/span><br \/>\n<span class=\"token punctuation\">{<\/span><br \/>\n    <span class=\"token class-name\">uint8_t<\/span> res<span class=\"token punctuation\">;<\/span><\/p>\n<p>    <span class=\"token keyword\">if<\/span> <span class=\"token punctuation\">(<\/span><span class=\"token punctuation\">(<\/span><span class=\"token function\">__HAL_UART_GET_FLAG<\/span><span class=\"token punctuation\">(<\/span><span class=\"token operator\">&amp;<\/span>g_rs458_handler<span class=\"token punctuation\">,<\/span> UART_FLAG_RXNE<span class=\"token punctuation\">)<\/span> <span class=\"token operator\">!&#061;<\/span> RESET<span class=\"token punctuation\">)<\/span><span class=\"token punctuation\">)<\/span> <span class=\"token comment\">\/* \u63a5\u6536\u5230\u6570\u636e *\/<\/span><br \/>\n    <span class=\"token punctuation\">{<\/span><br \/>\n        <span class=\"token function\">HAL_UART_Receive<\/span><span class=\"token punctuation\">(<\/span><span class=\"token operator\">&amp;<\/span>g_rs458_handler<span class=\"token punctuation\">,<\/span> <span class=\"token operator\">&amp;<\/span>res<span class=\"token punctuation\">,<\/span> <span class=\"token number\">1<\/span><span class=\"token punctuation\">,<\/span> <span class=\"token number\">1000<\/span><span class=\"token punctuation\">)<\/span><span class=\"token punctuation\">;<\/span><\/p>\n<p>        <span class=\"token keyword\">if<\/span> <span class=\"token punctuation\">(<\/span>g_RS485_rx_cnt <span class=\"token operator\">&lt;<\/span> RS485_REC_LEN<span class=\"token punctuation\">)<\/span>         <span class=\"token comment\">\/* \u7f13\u51b2\u533a\u672a\u6ee1 *\/<\/span><br \/>\n        <span class=\"token punctuation\">{<\/span><br \/>\n            g_RS485_rx_buf<span class=\"token punctuation\">[<\/span>g_RS485_rx_cnt<span class=\"token punctuation\">]<\/span> <span class=\"token operator\">&#061;<\/span> res<span class=\"token punctuation\">;<\/span>   <span class=\"token comment\">\/* \u8bb0\u5f55\u63a5\u6536\u5230\u7684\u503c *\/<\/span><br \/>\n            g_RS485_rx_cnt<span class=\"token operator\">&#043;&#043;<\/span><span class=\"token punctuation\">;<\/span>                       <span class=\"token comment\">\/* \u63a5\u6536\u6570\u636e\u589e\u52a01 *\/<\/span><br \/>\n        <span class=\"token punctuation\">}<\/span><br \/>\n    <span class=\"token punctuation\">}<\/span><br \/>\n<span class=\"token punctuation\">}<\/span><\/p>\n<p><span class=\"token macro property\"><span class=\"token directive-hash\">#<\/span><span class=\"token directive keyword\">endif<\/span><\/span><\/p>\n<p><span class=\"token comment\">\/**<br \/>\n * &#064;brief       RS485\u521d\u59cb\u5316\u51fd\u6570<br \/>\n *   &#064;note      \u8be5\u51fd\u6570\u4e3b\u8981\u662f\u521d\u59cb\u5316\u4e32\u53e3<br \/>\n * &#064;param       baudrate: \u6ce2\u7279\u7387, \u6839\u636e\u81ea\u5df1\u9700\u8981\u8bbe\u7f6e\u6ce2\u7279\u7387\u503c<br \/>\n * &#064;retval      \u65e0<br \/>\n *\/<\/span><br \/>\n<span class=\"token keyword\">void<\/span> <span class=\"token function\">rs485_init<\/span><span class=\"token punctuation\">(<\/span><span class=\"token class-name\">uint32_t<\/span> baudrate<span class=\"token punctuation\">)<\/span><br \/>\n<span class=\"token punctuation\">{<\/span><br \/>\n    <span class=\"token comment\">\/* IO \u53ca \u65f6\u949f\u914d\u7f6e *\/<\/span><br \/>\n    <span class=\"token function\">RS485_RE_GPIO_CLK_ENABLE<\/span><span class=\"token punctuation\">(<\/span><span class=\"token punctuation\">)<\/span><span class=\"token punctuation\">;<\/span> <span class=\"token comment\">\/* \u4f7f\u80fd RS485_RE \u811a\u65f6\u949f *\/<\/span><br \/>\n    <span class=\"token function\">RS485_TX_GPIO_CLK_ENABLE<\/span><span class=\"token punctuation\">(<\/span><span class=\"token punctuation\">)<\/span><span class=\"token punctuation\">;<\/span> <span class=\"token comment\">\/* \u4f7f\u80fd \u4e32\u53e3TX\u811a \u65f6\u949f *\/<\/span><br \/>\n    <span class=\"token function\">RS485_RX_GPIO_CLK_ENABLE<\/span><span class=\"token punctuation\">(<\/span><span class=\"token punctuation\">)<\/span><span class=\"token punctuation\">;<\/span> <span class=\"token comment\">\/* \u4f7f\u80fd \u4e32\u53e3RX\u811a \u65f6\u949f *\/<\/span><br \/>\n    <span class=\"token function\">RS485_UX_CLK_ENABLE<\/span><span class=\"token punctuation\">(<\/span><span class=\"token punctuation\">)<\/span><span class=\"token punctuation\">;<\/span>      <span class=\"token comment\">\/* \u4f7f\u80fd \u4e32\u53e3 \u65f6\u949f *\/<\/span><\/p>\n<p>    GPIO_InitTypeDef gpio_initure<span class=\"token punctuation\">;<\/span><br \/>\n    gpio_initure<span class=\"token punctuation\">.<\/span>Pin <span class=\"token operator\">&#061;<\/span> RS485_TX_GPIO_PIN<span class=\"token punctuation\">;<\/span><br \/>\n    gpio_initure<span class=\"token punctuation\">.<\/span>Mode <span class=\"token operator\">&#061;<\/span> GPIO_MODE_AF_PP<span class=\"token punctuation\">;<\/span><br \/>\n    gpio_initure<span class=\"token punctuation\">.<\/span>Pull <span class=\"token operator\">&#061;<\/span> GPIO_PULLUP<span class=\"token punctuation\">;<\/span><br \/>\n    gpio_initure<span class=\"token punctuation\">.<\/span>Speed <span class=\"token operator\">&#061;<\/span> GPIO_SPEED_FREQ_HIGH<span class=\"token punctuation\">;<\/span><br \/>\n    <span class=\"token function\">HAL_GPIO_Init<\/span><span class=\"token punctuation\">(<\/span>RS485_TX_GPIO_PORT<span class=\"token punctuation\">,<\/span> <span class=\"token operator\">&amp;<\/span>gpio_initure<span class=\"token punctuation\">)<\/span><span class=\"token punctuation\">;<\/span> <span class=\"token comment\">\/* \u4e32\u53e3TX \u811a \u6a21\u5f0f\u8bbe\u7f6e *\/<\/span><\/p>\n<p>    gpio_initure<span class=\"token punctuation\">.<\/span>Pin <span class=\"token operator\">&#061;<\/span> RS485_RX_GPIO_PIN<span class=\"token punctuation\">;<\/span><br \/>\n    gpio_initure<span class=\"token punctuation\">.<\/span>Mode <span class=\"token operator\">&#061;<\/span> GPIO_MODE_AF_INPUT<span class=\"token punctuation\">;<\/span><br \/>\n    <span class=\"token function\">HAL_GPIO_Init<\/span><span class=\"token punctuation\">(<\/span>RS485_RX_GPIO_PORT<span class=\"token punctuation\">,<\/span> <span class=\"token operator\">&amp;<\/span>gpio_initure<span class=\"token punctuation\">)<\/span><span class=\"token punctuation\">;<\/span> <span class=\"token comment\">\/* \u4e32\u53e3RX \u811a \u5fc5\u987b\u8bbe\u7f6e\u6210\u8f93\u5165\u6a21\u5f0f *\/<\/span><\/p>\n<p>    gpio_initure<span class=\"token punctuation\">.<\/span>Pin <span class=\"token operator\">&#061;<\/span> RS485_RE_GPIO_PIN<span class=\"token punctuation\">;<\/span><br \/>\n    gpio_initure<span class=\"token punctuation\">.<\/span>Mode <span class=\"token operator\">&#061;<\/span> GPIO_MODE_OUTPUT_PP<span class=\"token punctuation\">;<\/span><br \/>\n    gpio_initure<span class=\"token punctuation\">.<\/span>Pull <span class=\"token operator\">&#061;<\/span> GPIO_PULLUP<span class=\"token punctuation\">;<\/span><br \/>\n    gpio_initure<span class=\"token punctuation\">.<\/span>Speed <span class=\"token operator\">&#061;<\/span> GPIO_SPEED_FREQ_HIGH<span class=\"token punctuation\">;<\/span><br \/>\n    <span class=\"token function\">HAL_GPIO_Init<\/span><span class=\"token punctuation\">(<\/span>RS485_RE_GPIO_PORT<span class=\"token punctuation\">,<\/span> <span class=\"token operator\">&amp;<\/span>gpio_initure<span class=\"token punctuation\">)<\/span><span class=\"token punctuation\">;<\/span> <span class=\"token comment\">\/* RS485_RE \u811a \u6a21\u5f0f\u8bbe\u7f6e *\/<\/span><\/p>\n<p>    <span class=\"token comment\">\/* USART \u521d\u59cb\u5316\u8bbe\u7f6e *\/<\/span><br \/>\n    g_rs458_handler<span class=\"token punctuation\">.<\/span>Instance <span class=\"token operator\">&#061;<\/span> RS485_UX<span class=\"token punctuation\">;<\/span>                  <span class=\"token comment\">\/* \u9009\u62e9485\u5bf9\u5e94\u7684\u4e32\u53e3 *\/<\/span><br \/>\n    g_rs458_handler<span class=\"token punctuation\">.<\/span>Init<span class=\"token punctuation\">.<\/span>BaudRate <span class=\"token operator\">&#061;<\/span> baudrate<span class=\"token punctuation\">;<\/span>             <span class=\"token comment\">\/* \u6ce2\u7279\u7387 *\/<\/span><br \/>\n    g_rs458_handler<span class=\"token punctuation\">.<\/span>Init<span class=\"token punctuation\">.<\/span>WordLength <span class=\"token operator\">&#061;<\/span> UART_WORDLENGTH_8B<span class=\"token punctuation\">;<\/span> <span class=\"token comment\">\/* \u5b57\u957f\u4e3a8\u4f4d\u6570\u636e\u683c\u5f0f *\/<\/span><br \/>\n    g_rs458_handler<span class=\"token punctuation\">.<\/span>Init<span class=\"token punctuation\">.<\/span>StopBits <span class=\"token operator\">&#061;<\/span> UART_STOPBITS_1<span class=\"token punctuation\">;<\/span>      <span class=\"token comment\">\/* \u4e00\u4e2a\u505c\u6b62\u4f4d *\/<\/span><br \/>\n    g_rs458_handler<span class=\"token punctuation\">.<\/span>Init<span class=\"token punctuation\">.<\/span>Parity <span class=\"token operator\">&#061;<\/span> UART_PARITY_NONE<span class=\"token punctuation\">;<\/span>       <span class=\"token comment\">\/* \u65e0\u5947\u5076\u6821\u9a8c\u4f4d *\/<\/span><br \/>\n    g_rs458_handler<span class=\"token punctuation\">.<\/span>Init<span class=\"token punctuation\">.<\/span>HwFlowCtl <span class=\"token operator\">&#061;<\/span> UART_HWCONTROL_NONE<span class=\"token punctuation\">;<\/span> <span class=\"token comment\">\/* \u65e0\u786c\u4ef6\u6d41\u63a7 *\/<\/span><br \/>\n    g_rs458_handler<span class=\"token punctuation\">.<\/span>Init<span class=\"token punctuation\">.<\/span>Mode <span class=\"token operator\">&#061;<\/span> UART_MODE_TX_RX<span class=\"token punctuation\">;<\/span>          <span class=\"token comment\">\/* \u6536\u53d1\u6a21\u5f0f *\/<\/span><br \/>\n    <span class=\"token function\">HAL_UART_Init<\/span><span class=\"token punctuation\">(<\/span><span class=\"token operator\">&amp;<\/span>g_rs458_handler<span class=\"token punctuation\">)<\/span><span class=\"token punctuation\">;<\/span>                      <span class=\"token comment\">\/* HAL_UART_Init()\u4f1a\u4f7f\u80fdUART2 *\/<\/span><\/p>\n<p><span class=\"token macro property\"><span class=\"token directive-hash\">#<\/span><span class=\"token directive keyword\">if<\/span> <span class=\"token expression\">RS485_EN_RX <\/span><span class=\"token comment\">\/* \u5982\u679c\u4f7f\u80fd\u4e86\u63a5\u6536 *\/<\/span><\/span><br \/>\n    <span class=\"token comment\">\/* \u4f7f\u80fd\u63a5\u6536\u4e2d\u65ad *\/<\/span><br \/>\n    <span class=\"token function\">__HAL_UART_ENABLE_IT<\/span><span class=\"token punctuation\">(<\/span><span class=\"token operator\">&amp;<\/span>g_rs458_handler<span class=\"token punctuation\">,<\/span> UART_IT_RXNE<span class=\"token punctuation\">)<\/span><span class=\"token punctuation\">;<\/span> <span class=\"token comment\">\/* \u5f00\u542f\u63a5\u6536\u4e2d\u65ad *\/<\/span><br \/>\n    <span class=\"token function\">HAL_NVIC_EnableIRQ<\/span><span class=\"token punctuation\">(<\/span>RS485_UX_IRQn<span class=\"token punctuation\">)<\/span><span class=\"token punctuation\">;<\/span>                    <span class=\"token comment\">\/* \u4f7f\u80fdUSART2\u4e2d\u65ad *\/<\/span><br \/>\n    <span class=\"token function\">HAL_NVIC_SetPriority<\/span><span class=\"token punctuation\">(<\/span>RS485_UX_IRQn<span class=\"token punctuation\">,<\/span> <span class=\"token number\">3<\/span><span class=\"token punctuation\">,<\/span> <span class=\"token number\">3<\/span><span class=\"token punctuation\">)<\/span><span class=\"token punctuation\">;<\/span>            <span class=\"token comment\">\/* \u62a2\u5360\u4f18\u5148\u7ea73&#xff0c;\u5b50\u4f18\u5148\u7ea73 *\/<\/span><br \/>\n<span class=\"token macro property\"><span class=\"token directive-hash\">#<\/span><span class=\"token directive keyword\">endif<\/span><\/span><\/p>\n<p>    <span class=\"token function\">RS485_RE<\/span><span class=\"token punctuation\">(<\/span><span class=\"token number\">0<\/span><span class=\"token punctuation\">)<\/span><span class=\"token punctuation\">;<\/span> <span class=\"token comment\">\/* \u9ed8\u8ba4\u4e3a\u63a5\u6536\u6a21\u5f0f *\/<\/span><br \/>\n<span class=\"token punctuation\">}<\/span><\/p>\n<p><span class=\"token comment\">\/**<br \/>\n * &#064;brief       RS485\u53d1\u9001len\u4e2a\u5b57\u8282<br \/>\n * &#064;param       buf     : \u53d1\u9001\u7f13\u5b58\u533a\u9996\u5730\u5740<br \/>\n * &#064;param       len     : \u53d1\u9001\u7684\u5b57\u8282\u6570(\u4e3a\u4e86\u548c\u672c\u4ee3\u7801\u7684\u63a5\u6536\u5339\u914d,\u8fd9\u91cc\u5efa\u8bae\u4e0d\u8981\u8d85\u8fc7 RS485_REC_LEN \u4e2a\u5b57\u8282)<br \/>\n * &#064;retval      \u65e0<br \/>\n *\/<\/span><br \/>\n<span class=\"token keyword\">void<\/span> <span class=\"token function\">rs485_send_data<\/span><span class=\"token punctuation\">(<\/span><span class=\"token class-name\">uint8_t<\/span> <span class=\"token operator\">*<\/span>buf<span class=\"token punctuation\">,<\/span> <span class=\"token class-name\">uint8_t<\/span> len<span class=\"token punctuation\">)<\/span><br \/>\n<span class=\"token punctuation\">{<\/span><br \/>\n    <span class=\"token function\">RS485_RE<\/span><span class=\"token punctuation\">(<\/span><span class=\"token number\">1<\/span><span class=\"token punctuation\">)<\/span><span class=\"token punctuation\">;<\/span>                                         <span class=\"token comment\">\/* \u8fdb\u5165\u53d1\u9001\u6a21\u5f0f *\/<\/span><br \/>\n    <span class=\"token function\">HAL_UART_Transmit<\/span><span class=\"token punctuation\">(<\/span><span class=\"token operator\">&amp;<\/span>g_rs458_handler<span class=\"token punctuation\">,<\/span> buf<span class=\"token punctuation\">,<\/span> len<span class=\"token punctuation\">,<\/span> <span class=\"token number\">1000<\/span><span class=\"token punctuation\">)<\/span><span class=\"token punctuation\">;<\/span> <span class=\"token comment\">\/* \u4e32\u53e32\u53d1\u9001\u6570\u636e *\/<\/span><br \/>\n    g_RS485_rx_cnt <span class=\"token operator\">&#061;<\/span> <span class=\"token number\">0<\/span><span class=\"token punctuation\">;<\/span><br \/>\n    <span class=\"token function\">RS485_RE<\/span><span class=\"token punctuation\">(<\/span><span class=\"token number\">0<\/span><span class=\"token punctuation\">)<\/span><span class=\"token punctuation\">;<\/span> <span class=\"token comment\">\/* \u8fdb\u5165\u63a5\u6536\u6a21\u5f0f *\/<\/span><br \/>\n<span class=\"token punctuation\">}<\/span><\/p>\n<p><span class=\"token comment\">\/**<br \/>\n * &#064;brief       RS485\u67e5\u8be2\u63a5\u6536\u5230\u7684\u6570\u636e<br \/>\n * &#064;param       buf     : \u63a5\u6536\u7f13\u51b2\u533a\u9996\u5730\u5740<br \/>\n * &#064;param       len     : \u63a5\u6536\u5230\u7684\u6570\u636e\u957f\u5ea6<br \/>\n *   &#064;arg               0   , \u8868\u793a\u6ca1\u6709\u63a5\u6536\u5230\u4efb\u4f55\u6570\u636e<br \/>\n *   &#064;arg               \u5176\u4ed6, \u8868\u793a\u63a5\u6536\u5230\u7684\u6570\u636e\u957f\u5ea6<br \/>\n * &#064;retval      \u65e0<br \/>\n *\/<\/span><br \/>\n<span class=\"token keyword\">void<\/span> <span class=\"token function\">rs485_receive_data<\/span><span class=\"token punctuation\">(<\/span><span class=\"token class-name\">uint8_t<\/span> <span class=\"token operator\">*<\/span>buf<span class=\"token punctuation\">,<\/span> <span class=\"token class-name\">uint8_t<\/span> <span class=\"token operator\">*<\/span>len<span class=\"token punctuation\">)<\/span><br \/>\n<span class=\"token punctuation\">{<\/span><br \/>\n    <span class=\"token class-name\">uint8_t<\/span> rxlen <span class=\"token operator\">&#061;<\/span> g_RS485_rx_cnt<span class=\"token punctuation\">;<\/span><br \/>\n    <span class=\"token class-name\">uint8_t<\/span> i <span class=\"token operator\">&#061;<\/span> <span class=\"token number\">0<\/span><span class=\"token punctuation\">;<\/span><br \/>\n    <span class=\"token operator\">*<\/span>len <span class=\"token operator\">&#061;<\/span> <span class=\"token number\">0<\/span><span class=\"token punctuation\">;<\/span>     <span class=\"token comment\">\/* \u9ed8\u8ba4\u4e3a0 *\/<\/span><br \/>\n    <span class=\"token function\">delay_ms<\/span><span class=\"token punctuation\">(<\/span><span class=\"token number\">10<\/span><span class=\"token punctuation\">)<\/span><span class=\"token punctuation\">;<\/span> <span class=\"token comment\">\/* \u7b49\u5f8510ms,\u8fde\u7eed\u8d85\u8fc710ms\u6ca1\u6709\u63a5\u6536\u5230\u4e00\u4e2a\u6570\u636e,\u5219\u8ba4\u4e3a\u63a5\u6536\u7ed3\u675f *\/<\/span><\/p>\n<p>    <span class=\"token keyword\">if<\/span> <span class=\"token punctuation\">(<\/span>rxlen <span class=\"token operator\">&#061;&#061;<\/span> g_RS485_rx_cnt <span class=\"token operator\">&amp;&amp;<\/span> rxlen<span class=\"token punctuation\">)<\/span> <span class=\"token comment\">\/* \u63a5\u6536\u5230\u4e86\u6570\u636e,\u4e14\u63a5\u6536\u5b8c\u6210\u4e86 *\/<\/span><br \/>\n    <span class=\"token punctuation\">{<\/span><br \/>\n        <span class=\"token keyword\">for<\/span> <span class=\"token punctuation\">(<\/span>i <span class=\"token operator\">&#061;<\/span> <span class=\"token number\">0<\/span><span class=\"token punctuation\">;<\/span> i <span class=\"token operator\">&lt;<\/span> rxlen<span class=\"token punctuation\">;<\/span> i<span class=\"token operator\">&#043;&#043;<\/span><span class=\"token punctuation\">)<\/span><br \/>\n        <span class=\"token punctuation\">{<\/span><br \/>\n            buf<span class=\"token punctuation\">[<\/span>i<span class=\"token punctuation\">]<\/span> <span class=\"token operator\">&#061;<\/span> g_RS485_rx_buf<span class=\"token punctuation\">[<\/span>i<span class=\"token punctuation\">]<\/span><span class=\"token punctuation\">;<\/span><br \/>\n        <span class=\"token punctuation\">}<\/span><\/p>\n<p>        <span class=\"token operator\">*<\/span>len <span class=\"token operator\">&#061;<\/span> g_RS485_rx_cnt<span class=\"token punctuation\">;<\/span> <span class=\"token comment\">\/* \u8bb0\u5f55\u672c\u6b21\u6570\u636e\u957f\u5ea6 *\/<\/span><br \/>\n        g_RS485_rx_cnt <span class=\"token operator\">&#061;<\/span> <span class=\"token number\">0<\/span><span class=\"token punctuation\">;<\/span>    <span class=\"token comment\">\/* \u6e05\u96f6 *\/<\/span><br \/>\n    <span class=\"token punctuation\">}<\/span><br \/>\n<span class=\"token punctuation\">}<\/span><\/p>\n<p><font color=\"red\">rs485.h<\/font><\/p>\n<p><span class=\"token macro property\"><span class=\"token directive-hash\">#<\/span><span class=\"token directive keyword\">ifndef<\/span> <span class=\"token expression\">__RS485_H<\/span><\/span><br \/>\n<span class=\"token macro property\"><span class=\"token directive-hash\">#<\/span><span class=\"token directive keyword\">define<\/span> <span class=\"token macro-name\">__RS485_H<\/span><\/span><\/p>\n<p><span class=\"token macro property\"><span class=\"token directive-hash\">#<\/span><span class=\"token directive keyword\">include<\/span> <span class=\"token string\">&#034;.\/SYSTEM\/sys\/sys.h&#034;<\/span><\/span><\/p>\n<p><span class=\"token comment\">\/******************************************************************************************\/<\/span><br \/>\n<span class=\"token comment\">\/* RS485 \u5f15\u811a \u548c \u4e32\u53e3 \u5b9a\u4e49<br \/>\n * \u9ed8\u8ba4\u662f\u9488\u5bf9RS485\u7684.<br \/>\n *\/<\/span><br \/>\n<span class=\"token macro property\"><span class=\"token directive-hash\">#<\/span><span class=\"token directive keyword\">define<\/span> <span class=\"token macro-name\">RS485_RE_GPIO_PORT<\/span>                  <span class=\"token expression\">GPIOD<\/span><\/span><br \/>\n<span class=\"token macro property\"><span class=\"token directive-hash\">#<\/span><span class=\"token directive keyword\">define<\/span> <span class=\"token macro-name\">RS485_RE_GPIO_PIN<\/span>                   <span class=\"token expression\">GPIO_PIN_7<\/span><\/span><br \/>\n<span class=\"token macro property\"><span class=\"token directive-hash\">#<\/span><span class=\"token directive keyword\">define<\/span> <span class=\"token macro-name function\">RS485_RE_GPIO_CLK_ENABLE<\/span><span class=\"token expression\"><span class=\"token punctuation\">(<\/span><span class=\"token punctuation\">)<\/span>          <span class=\"token keyword\">do<\/span><span class=\"token punctuation\">{<\/span> <span class=\"token function\">__HAL_RCC_GPIOD_CLK_ENABLE<\/span><span class=\"token punctuation\">(<\/span><span class=\"token punctuation\">)<\/span><span class=\"token punctuation\">;<\/span> <span class=\"token punctuation\">}<\/span><span class=\"token keyword\">while<\/span><span class=\"token punctuation\">(<\/span><span class=\"token number\">0<\/span><span class=\"token punctuation\">)<\/span>   <\/span><span class=\"token comment\">\/* PD\u53e3\u65f6\u949f\u4f7f\u80fd *\/<\/span><\/span><\/p>\n<p><span class=\"token macro property\"><span class=\"token directive-hash\">#<\/span><span class=\"token directive keyword\">define<\/span> <span class=\"token macro-name\">RS485_TX_GPIO_PORT<\/span>                  <span class=\"token expression\">GPIOA<\/span><\/span><br \/>\n<span class=\"token macro property\"><span class=\"token directive-hash\">#<\/span><span class=\"token directive keyword\">define<\/span> <span class=\"token macro-name\">RS485_TX_GPIO_PIN<\/span>                   <span class=\"token expression\">GPIO_PIN_2<\/span><\/span><br \/>\n<span class=\"token macro property\"><span class=\"token directive-hash\">#<\/span><span class=\"token directive keyword\">define<\/span> <span class=\"token macro-name function\">RS485_TX_GPIO_CLK_ENABLE<\/span><span class=\"token expression\"><span class=\"token punctuation\">(<\/span><span class=\"token punctuation\">)<\/span>          <span class=\"token keyword\">do<\/span><span class=\"token punctuation\">{<\/span> <span class=\"token function\">__HAL_RCC_GPIOA_CLK_ENABLE<\/span><span class=\"token punctuation\">(<\/span><span class=\"token punctuation\">)<\/span><span class=\"token punctuation\">;<\/span> <span class=\"token punctuation\">}<\/span><span class=\"token keyword\">while<\/span><span class=\"token punctuation\">(<\/span><span class=\"token number\">0<\/span><span class=\"token punctuation\">)<\/span>   <\/span><span class=\"token comment\">\/* PA\u53e3\u65f6\u949f\u4f7f\u80fd *\/<\/span><\/span><\/p>\n<p><span class=\"token macro property\"><span class=\"token directive-hash\">#<\/span><span class=\"token directive keyword\">define<\/span> <span class=\"token macro-name\">RS485_RX_GPIO_PORT<\/span>                  <span class=\"token expression\">GPIOA<\/span><\/span><br \/>\n<span class=\"token macro property\"><span class=\"token directive-hash\">#<\/span><span class=\"token directive keyword\">define<\/span> <span class=\"token macro-name\">RS485_RX_GPIO_PIN<\/span>                   <span class=\"token expression\">GPIO_PIN_3<\/span><\/span><br \/>\n<span class=\"token macro property\"><span class=\"token directive-hash\">#<\/span><span class=\"token directive keyword\">define<\/span> <span class=\"token macro-name function\">RS485_RX_GPIO_CLK_ENABLE<\/span><span class=\"token expression\"><span class=\"token punctuation\">(<\/span><span class=\"token punctuation\">)<\/span>          <span class=\"token keyword\">do<\/span><span class=\"token punctuation\">{<\/span> <span class=\"token function\">__HAL_RCC_GPIOA_CLK_ENABLE<\/span><span class=\"token punctuation\">(<\/span><span class=\"token punctuation\">)<\/span><span class=\"token punctuation\">;<\/span> <span class=\"token punctuation\">}<\/span><span class=\"token keyword\">while<\/span><span class=\"token punctuation\">(<\/span><span class=\"token number\">0<\/span><span class=\"token punctuation\">)<\/span>   <\/span><span class=\"token comment\">\/* PA\u53e3\u65f6\u949f\u4f7f\u80fd *\/<\/span><\/span><\/p>\n<p><span class=\"token macro property\"><span class=\"token directive-hash\">#<\/span><span class=\"token directive keyword\">define<\/span> <span class=\"token macro-name\">RS485_UX<\/span>                            <span class=\"token expression\">USART2<\/span><\/span><br \/>\n<span class=\"token macro property\"><span class=\"token directive-hash\">#<\/span><span class=\"token directive keyword\">define<\/span> <span class=\"token macro-name\">RS485_UX_IRQn<\/span>                       <span class=\"token expression\">USART2_IRQn<\/span><\/span><br \/>\n<span class=\"token macro property\"><span class=\"token directive-hash\">#<\/span><span class=\"token directive keyword\">define<\/span> <span class=\"token macro-name\">RS485_UX_IRQHandler<\/span>                 <span class=\"token expression\">USART2_IRQHandler<\/span><\/span><br \/>\n<span class=\"token macro property\"><span class=\"token directive-hash\">#<\/span><span class=\"token directive keyword\">define<\/span> <span class=\"token macro-name function\">RS485_UX_CLK_ENABLE<\/span><span class=\"token expression\"><span class=\"token punctuation\">(<\/span><span class=\"token punctuation\">)<\/span>               <span class=\"token keyword\">do<\/span><span class=\"token punctuation\">{<\/span> <span class=\"token function\">__HAL_RCC_USART2_CLK_ENABLE<\/span><span class=\"token punctuation\">(<\/span><span class=\"token punctuation\">)<\/span><span class=\"token punctuation\">;<\/span> <span class=\"token punctuation\">}<\/span><span class=\"token keyword\">while<\/span><span class=\"token punctuation\">(<\/span><span class=\"token number\">0<\/span><span class=\"token punctuation\">)<\/span>  <\/span><span class=\"token comment\">\/* USART2 \u65f6\u949f\u4f7f\u80fd *\/<\/span><\/span><\/p>\n<p><span class=\"token comment\">\/******************************************************************************************\/<\/span><\/p>\n<p><span class=\"token comment\">\/* \u63a7\u5236RS485_RE\u811a, \u63a7\u5236RS485\u53d1\u9001\/\u63a5\u6536\u72b6\u6001<br \/>\n * RS485_RE &#061; 0, \u8fdb\u5165\u63a5\u6536\u6a21\u5f0f<br \/>\n * RS485_RE &#061; 1, \u8fdb\u5165\u53d1\u9001\u6a21\u5f0f<br \/>\n *\/<\/span><br \/>\n<span class=\"token macro property\"><span class=\"token directive-hash\">#<\/span><span class=\"token directive keyword\">define<\/span> <span class=\"token macro-name function\">RS485_RE<\/span><span class=\"token expression\"><span class=\"token punctuation\">(<\/span>x<span class=\"token punctuation\">)<\/span>   <span class=\"token keyword\">do<\/span><span class=\"token punctuation\">{<\/span> x <span class=\"token operator\">?<\/span> <\/span><span class=\"token punctuation\">\\\\<\/span><br \/>\n                          <span class=\"token expression\"><span class=\"token function\">HAL_GPIO_WritePin<\/span><span class=\"token punctuation\">(<\/span>RS485_RE_GPIO_PORT<span class=\"token punctuation\">,<\/span> RS485_RE_GPIO_PIN<span class=\"token punctuation\">,<\/span> GPIO_PIN_SET<span class=\"token punctuation\">)<\/span> <span class=\"token operator\">:<\/span> <\/span><span class=\"token punctuation\">\\\\<\/span><br \/>\n                          <span class=\"token expression\"><span class=\"token function\">HAL_GPIO_WritePin<\/span><span class=\"token punctuation\">(<\/span>RS485_RE_GPIO_PORT<span class=\"token punctuation\">,<\/span> RS485_RE_GPIO_PIN<span class=\"token punctuation\">,<\/span> GPIO_PIN_RESET<span class=\"token punctuation\">)<\/span><span class=\"token punctuation\">;<\/span> <\/span><span class=\"token punctuation\">\\\\<\/span><br \/>\n                      <span class=\"token expression\"><span class=\"token punctuation\">}<\/span><span class=\"token keyword\">while<\/span><span class=\"token punctuation\">(<\/span><span class=\"token number\">0<\/span><span class=\"token punctuation\">)<\/span><\/span><\/span><\/p>\n<p><span class=\"token macro property\"><span class=\"token directive-hash\">#<\/span><span class=\"token directive keyword\">define<\/span> <span class=\"token macro-name\">RS485_REC_LEN<\/span>               <span class=\"token expression\"><span class=\"token number\">64<\/span>          <\/span><span class=\"token comment\">\/* \u5b9a\u4e49\u6700\u5927\u63a5\u6536\u5b57\u8282\u6570 64 *\/<\/span><\/span><br \/>\n<span class=\"token macro property\"><span class=\"token directive-hash\">#<\/span><span class=\"token directive keyword\">define<\/span> <span class=\"token macro-name\">RS485_EN_RX<\/span>                 <span class=\"token expression\"><span class=\"token number\">1<\/span>           <\/span><span class=\"token comment\">\/* \u4f7f\u80fd&#xff08;1&#xff09;\/\u7981\u6b62&#xff08;0&#xff09;RS485\u63a5\u6536 *\/<\/span><\/span><\/p>\n<p><span class=\"token keyword\">extern<\/span> <span class=\"token class-name\">uint8_t<\/span> g_RS485_rx_buf<span class=\"token punctuation\">[<\/span>RS485_REC_LEN<span class=\"token punctuation\">]<\/span><span class=\"token punctuation\">;<\/span>   <span class=\"token comment\">\/* \u63a5\u6536\u7f13\u51b2,\u6700\u5927RS485_REC_LEN\u4e2a\u5b57\u8282 *\/<\/span><br \/>\n<span class=\"token keyword\">extern<\/span> <span class=\"token class-name\">uint8_t<\/span> g_RS485_rx_cnt<span class=\"token punctuation\">;<\/span>                  <span class=\"token comment\">\/* \u63a5\u6536\u6570\u636e\u957f\u5ea6 *\/<\/span><\/p>\n<p><span class=\"token keyword\">void<\/span> <span class=\"token function\">rs485_init<\/span><span class=\"token punctuation\">(<\/span> <span class=\"token class-name\">uint32_t<\/span> baudrate<span class=\"token punctuation\">)<\/span><span class=\"token punctuation\">;<\/span>  <span class=\"token comment\">\/* RS485\u521d\u59cb\u5316 *\/<\/span><br \/>\n<span class=\"token keyword\">void<\/span> <span class=\"token function\">rs485_send_data<\/span><span class=\"token punctuation\">(<\/span><span class=\"token class-name\">uint8_t<\/span> <span class=\"token operator\">*<\/span>buf<span class=\"token punctuation\">,<\/span> <span class=\"token class-name\">uint8_t<\/span> len<span class=\"token punctuation\">)<\/span><span class=\"token punctuation\">;<\/span>    <span class=\"token comment\">\/* RS485\u53d1\u9001\u6570\u636e *\/<\/span><br \/>\n<span class=\"token keyword\">void<\/span> <span class=\"token function\">rs485_receive_data<\/span><span class=\"token punctuation\">(<\/span><span class=\"token class-name\">uint8_t<\/span> <span class=\"token operator\">*<\/span>buf<span class=\"token punctuation\">,<\/span> <span class=\"token class-name\">uint8_t<\/span> <span class=\"token operator\">*<\/span>len<span class=\"token punctuation\">)<\/span><span class=\"token punctuation\">;<\/span><span class=\"token comment\">\/* RS485\u63a5\u6536\u6570\u636e *\/<\/span><\/p>\n<p><span class=\"token macro property\"><span class=\"token directive-hash\">#<\/span><span class=\"token directive keyword\">endif<\/span><\/span><\/p>\n<p><font color=\"red\">usart.c<\/font><\/p>\n<p><span class=\"token macro property\"><span class=\"token directive-hash\">#<\/span><span class=\"token directive keyword\">include<\/span> <span class=\"token string\">&#034;.\/SYSTEM\/sys\/sys.h&#034;<\/span><\/span><br \/>\n<span class=\"token macro property\"><span class=\"token directive-hash\">#<\/span><span class=\"token directive keyword\">include<\/span> <span class=\"token string\">&#034;.\/SYSTEM\/usart\/usart.h&#034;<\/span><\/span><\/p>\n<p><span class=\"token comment\">\/* \u5982\u679c\u4f7f\u7528os,\u5219\u5305\u62ec\u4e0b\u9762\u7684\u5934\u6587\u4ef6\u5373\u53ef. *\/<\/span><br \/>\n<span class=\"token macro property\"><span class=\"token directive-hash\">#<\/span><span class=\"token directive keyword\">if<\/span> <span class=\"token expression\">SYS_SUPPORT_OS<\/span><\/span><br \/>\n<span class=\"token macro property\"><span class=\"token directive-hash\">#<\/span><span class=\"token directive keyword\">include<\/span> <span class=\"token string\">&#034;includes.h&#034;<\/span> <span class=\"token comment\">\/* os \u4f7f\u7528 *\/<\/span><\/span><br \/>\n<span class=\"token macro property\"><span class=\"token directive-hash\">#<\/span><span class=\"token directive keyword\">endif<\/span><\/span><\/p>\n<p><span class=\"token comment\">\/******************************************************************************************\/<\/span><br \/>\n<span class=\"token comment\">\/* \u52a0\u5165\u4ee5\u4e0b\u4ee3\u7801, \u652f\u6301printf\u51fd\u6570, \u800c\u4e0d\u9700\u8981\u9009\u62e9use MicroLIB *\/<\/span><\/p>\n<p><span class=\"token macro property\"><span class=\"token directive-hash\">#<\/span><span class=\"token directive keyword\">if<\/span> <span class=\"token expression\"><span class=\"token number\">1<\/span><\/span><\/span><\/p>\n<p><span class=\"token macro property\"><span class=\"token directive-hash\">#<\/span><span class=\"token directive keyword\">if<\/span> <span class=\"token expression\"><span class=\"token punctuation\">(<\/span>__ARMCC_VERSION <span class=\"token operator\">&gt;&#061;<\/span> <span class=\"token number\">6010050<\/span><span class=\"token punctuation\">)<\/span>            <\/span><span class=\"token comment\">\/* \u4f7f\u7528AC6\u7f16\u8bd1\u5668\u65f6 *\/<\/span><\/span><br \/>\n<span class=\"token function\">__asm<\/span><span class=\"token punctuation\">(<\/span><span class=\"token string\">&#034;.global __use_no_semihosting\\\\n\\\\t&#034;<\/span><span class=\"token punctuation\">)<\/span><span class=\"token punctuation\">;<\/span>  <span class=\"token comment\">\/* \u58f0\u660e\u4e0d\u4f7f\u7528\u534a\u4e3b\u673a\u6a21\u5f0f *\/<\/span><br \/>\n<span class=\"token function\">__asm<\/span><span class=\"token punctuation\">(<\/span><span class=\"token string\">&#034;.global __ARM_use_no_argv \\\\n\\\\t&#034;<\/span><span class=\"token punctuation\">)<\/span><span class=\"token punctuation\">;<\/span>    <span class=\"token comment\">\/* AC6\u4e0b\u9700\u8981\u58f0\u660emain\u51fd\u6570\u4e3a\u65e0\u53c2\u6570\u683c\u5f0f&#xff0c;\u5426\u5219\u90e8\u5206\u4f8b\u7a0b\u53ef\u80fd\u51fa\u73b0\u534a\u4e3b\u673a\u6a21\u5f0f *\/<\/span><\/p>\n<p><span class=\"token macro property\"><span class=\"token directive-hash\">#<\/span><span class=\"token directive keyword\">else<\/span><\/span><br \/>\n<span class=\"token comment\">\/* \u4f7f\u7528AC5\u7f16\u8bd1\u5668\u65f6, \u8981\u5728\u8fd9\u91cc\u5b9a\u4e49__FILE \u548c \u4e0d\u4f7f\u7528\u534a\u4e3b\u673a\u6a21\u5f0f *\/<\/span><br \/>\n<span class=\"token macro property\"><span class=\"token directive-hash\">#<\/span><span class=\"token directive keyword\">pragma<\/span> <span class=\"token expression\"><span class=\"token function\">import<\/span><span class=\"token punctuation\">(<\/span>__use_no_semihosting<span class=\"token punctuation\">)<\/span><\/span><\/span><\/p>\n<p><span class=\"token keyword\">struct<\/span> <span class=\"token class-name\">__FILE<\/span><br \/>\n<span class=\"token punctuation\">{<\/span><br \/>\n    <span class=\"token keyword\">int<\/span> handle<span class=\"token punctuation\">;<\/span><br \/>\n    <span class=\"token comment\">\/* Whatever you require here. If the only file you are using is *\/<\/span><br \/>\n    <span class=\"token comment\">\/* standard output using printf() for debugging, no file handling *\/<\/span><br \/>\n    <span class=\"token comment\">\/* is required. *\/<\/span><br \/>\n<span class=\"token punctuation\">}<\/span><span class=\"token punctuation\">;<\/span><\/p>\n<p><span class=\"token macro property\"><span class=\"token directive-hash\">#<\/span><span class=\"token directive keyword\">endif<\/span><\/span><\/p>\n<p><span class=\"token comment\">\/* \u4e0d\u4f7f\u7528\u534a\u4e3b\u673a\u6a21\u5f0f&#xff0c;\u81f3\u5c11\u9700\u8981\u91cd\u5b9a\u4e49_ttywrch\\\\_sys_exit\\\\_sys_command_string\u51fd\u6570,\u4ee5\u540c\u65f6\u517c\u5bb9AC6\u548cAC5\u6a21\u5f0f *\/<\/span><br \/>\n<span class=\"token keyword\">int<\/span> <span class=\"token function\">_ttywrch<\/span><span class=\"token punctuation\">(<\/span><span class=\"token keyword\">int<\/span> ch<span class=\"token punctuation\">)<\/span><br \/>\n<span class=\"token punctuation\">{<\/span><br \/>\n    ch <span class=\"token operator\">&#061;<\/span> ch<span class=\"token punctuation\">;<\/span><br \/>\n    <span class=\"token keyword\">return<\/span> ch<span class=\"token punctuation\">;<\/span><br \/>\n<span class=\"token punctuation\">}<\/span><\/p>\n<p><span class=\"token comment\">\/* \u5b9a\u4e49_sys_exit()\u4ee5\u907f\u514d\u4f7f\u7528\u534a\u4e3b\u673a\u6a21\u5f0f *\/<\/span><br \/>\n<span class=\"token keyword\">void<\/span> <span class=\"token function\">_sys_exit<\/span><span class=\"token punctuation\">(<\/span><span class=\"token keyword\">int<\/span> x<span class=\"token punctuation\">)<\/span><br \/>\n<span class=\"token punctuation\">{<\/span><br \/>\n    x <span class=\"token operator\">&#061;<\/span> x<span class=\"token punctuation\">;<\/span><br \/>\n<span class=\"token punctuation\">}<\/span><\/p>\n<p><span class=\"token keyword\">char<\/span> <span class=\"token operator\">*<\/span><span class=\"token function\">_sys_command_string<\/span><span class=\"token punctuation\">(<\/span><span class=\"token keyword\">char<\/span> <span class=\"token operator\">*<\/span>cmd<span class=\"token punctuation\">,<\/span> <span class=\"token keyword\">int<\/span> len<span class=\"token punctuation\">)<\/span><br \/>\n<span class=\"token punctuation\">{<\/span><br \/>\n    <span class=\"token keyword\">return<\/span> <span class=\"token constant\">NULL<\/span><span class=\"token punctuation\">;<\/span><br \/>\n<span class=\"token punctuation\">}<\/span><\/p>\n<p><span class=\"token comment\">\/* FILE \u5728 stdio.h\u91cc\u9762\u5b9a\u4e49. *\/<\/span><br \/>\nFILE __stdout<span class=\"token punctuation\">;<\/span><\/p>\n<p><span class=\"token comment\">\/* MDK\u4e0b\u9700\u8981\u91cd\u5b9a\u4e49fputc\u51fd\u6570, printf\u51fd\u6570\u6700\u7ec8\u4f1a\u901a\u8fc7\u8c03\u7528fputc\u8f93\u51fa\u5b57\u7b26\u4e32\u5230\u4e32\u53e3 *\/<\/span><br \/>\n<span class=\"token keyword\">int<\/span> <span class=\"token function\">fputc<\/span><span class=\"token punctuation\">(<\/span><span class=\"token keyword\">int<\/span> ch<span class=\"token punctuation\">,<\/span> FILE <span class=\"token operator\">*<\/span>f<span class=\"token punctuation\">)<\/span><br \/>\n<span class=\"token punctuation\">{<\/span><br \/>\n    <span class=\"token keyword\">while<\/span> <span class=\"token punctuation\">(<\/span><span class=\"token punctuation\">(<\/span>USART_UX<span class=\"token operator\">-&gt;<\/span>SR <span class=\"token operator\">&amp;<\/span> <span class=\"token number\">0X40<\/span><span class=\"token punctuation\">)<\/span> <span class=\"token operator\">&#061;&#061;<\/span> <span class=\"token number\">0<\/span><span class=\"token punctuation\">)<\/span><span class=\"token punctuation\">;<\/span>     <span class=\"token comment\">\/* \u7b49\u5f85\u4e0a\u4e00\u4e2a\u5b57\u7b26\u53d1\u9001\u5b8c\u6210 *\/<\/span><\/p>\n<p>    USART_UX<span class=\"token operator\">-&gt;<\/span>DR <span class=\"token operator\">&#061;<\/span> <span class=\"token punctuation\">(<\/span><span class=\"token class-name\">uint8_t<\/span><span class=\"token punctuation\">)<\/span>ch<span class=\"token punctuation\">;<\/span>             <span class=\"token comment\">\/* \u5c06\u8981\u53d1\u9001\u7684\u5b57\u7b26 ch \u5199\u5165\u5230DR\u5bc4\u5b58\u5668 *\/<\/span><br \/>\n    <span class=\"token keyword\">return<\/span> ch<span class=\"token punctuation\">;<\/span><br \/>\n<span class=\"token punctuation\">}<\/span><br \/>\n<span class=\"token macro property\"><span class=\"token directive-hash\">#<\/span><span class=\"token directive keyword\">endif<\/span><\/span><br \/>\n<span class=\"token comment\">\/******************************************************************************************\/<\/span><\/p>\n<p><span class=\"token macro property\"><span class=\"token directive-hash\">#<\/span><span class=\"token directive keyword\">if<\/span> <span class=\"token expression\">USART_EN_RX <\/span><span class=\"token comment\">\/*\u5982\u679c\u4f7f\u80fd\u4e86\u63a5\u6536*\/<\/span><\/span><\/p>\n<p><span class=\"token comment\">\/* \u63a5\u6536\u7f13\u51b2, \u6700\u5927USART_REC_LEN\u4e2a\u5b57\u8282. *\/<\/span><br \/>\n<span class=\"token class-name\">uint8_t<\/span> g_usart_rx_buf<span class=\"token punctuation\">[<\/span>USART_REC_LEN<span class=\"token punctuation\">]<\/span><span class=\"token punctuation\">;<\/span><\/p>\n<p><span class=\"token comment\">\/*  \u63a5\u6536\u72b6\u6001<br \/>\n *  bit15&#xff0c;      \u63a5\u6536\u5b8c\u6210\u6807\u5fd7<br \/>\n *  bit14&#xff0c;      \u63a5\u6536\u52300x0d<br \/>\n *  bit13~0&#xff0c;    \u63a5\u6536\u5230\u7684\u6709\u6548\u5b57\u8282\u6570\u76ee<br \/>\n*\/<\/span><br \/>\n<span class=\"token class-name\">uint16_t<\/span> g_usart_rx_sta <span class=\"token operator\">&#061;<\/span> <span class=\"token number\">0<\/span><span class=\"token punctuation\">;<\/span><\/p>\n<p><span class=\"token class-name\">uint8_t<\/span> g_rx_buffer<span class=\"token punctuation\">[<\/span>RXBUFFERSIZE<span class=\"token punctuation\">]<\/span><span class=\"token punctuation\">;<\/span>  <span class=\"token comment\">\/* HAL\u5e93\u4f7f\u7528\u7684\u4e32\u53e3\u63a5\u6536\u7f13\u51b2 *\/<\/span><\/p>\n<p>UART_HandleTypeDef g_uart1_handle<span class=\"token punctuation\">;<\/span>  <span class=\"token comment\">\/* UART\u53e5\u67c4 *\/<\/span><\/p>\n<p><span class=\"token comment\">\/**<br \/>\n * &#064;brief       \u4e32\u53e3X\u521d\u59cb\u5316\u51fd\u6570<br \/>\n * &#064;param       baudrate: \u6ce2\u7279\u7387, \u6839\u636e\u81ea\u5df1\u9700\u8981\u8bbe\u7f6e\u6ce2\u7279\u7387\u503c<br \/>\n * &#064;note        \u6ce8\u610f: \u5fc5\u987b\u8bbe\u7f6e\u6b63\u786e\u7684\u65f6\u949f\u6e90, \u5426\u5219\u4e32\u53e3\u6ce2\u7279\u7387\u5c31\u4f1a\u8bbe\u7f6e\u5f02\u5e38.<br \/>\n *              \u8fd9\u91cc\u7684USART\u7684\u65f6\u949f\u6e90\u5728sys_stm32_clock_init()\u51fd\u6570\u4e2d\u5df2\u7ecf\u8bbe\u7f6e\u8fc7\u4e86.<br \/>\n * &#064;retval      \u65e0<br \/>\n *\/<\/span><br \/>\n<span class=\"token keyword\">void<\/span> <span class=\"token function\">usart_init<\/span><span class=\"token punctuation\">(<\/span><span class=\"token class-name\">uint32_t<\/span> baudrate<span class=\"token punctuation\">)<\/span><br \/>\n<span class=\"token punctuation\">{<\/span><br \/>\n    <span class=\"token comment\">\/* UART \u521d\u59cb\u5316\u8bbe\u7f6e*\/<\/span><br \/>\n    g_uart1_handle<span class=\"token punctuation\">.<\/span>Instance <span class=\"token operator\">&#061;<\/span> USART_UX<span class=\"token punctuation\">;<\/span>                                       <span class=\"token comment\">\/* USART_UX *\/<\/span><br \/>\n    g_uart1_handle<span class=\"token punctuation\">.<\/span>Init<span class=\"token punctuation\">.<\/span>BaudRate <span class=\"token operator\">&#061;<\/span> baudrate<span class=\"token punctuation\">;<\/span>                                  <span class=\"token comment\">\/* \u6ce2\u7279\u7387 *\/<\/span><br \/>\n    g_uart1_handle<span class=\"token punctuation\">.<\/span>Init<span class=\"token punctuation\">.<\/span>WordLength <span class=\"token operator\">&#061;<\/span> UART_WORDLENGTH_8B<span class=\"token punctuation\">;<\/span>                      <span class=\"token comment\">\/* \u5b57\u957f\u4e3a8\u4f4d\u6570\u636e\u683c\u5f0f *\/<\/span><br \/>\n    g_uart1_handle<span class=\"token punctuation\">.<\/span>Init<span class=\"token punctuation\">.<\/span>StopBits <span class=\"token operator\">&#061;<\/span> UART_STOPBITS_1<span class=\"token punctuation\">;<\/span>                           <span class=\"token comment\">\/* \u4e00\u4e2a\u505c\u6b62\u4f4d *\/<\/span><br \/>\n    g_uart1_handle<span class=\"token punctuation\">.<\/span>Init<span class=\"token punctuation\">.<\/span>Parity <span class=\"token operator\">&#061;<\/span> UART_PARITY_NONE<span class=\"token punctuation\">;<\/span>                            <span class=\"token comment\">\/* \u65e0\u5947\u5076\u6821\u9a8c\u4f4d *\/<\/span><br \/>\n    g_uart1_handle<span class=\"token punctuation\">.<\/span>Init<span class=\"token punctuation\">.<\/span>HwFlowCtl <span class=\"token operator\">&#061;<\/span> UART_HWCONTROL_NONE<span class=\"token punctuation\">;<\/span>                      <span class=\"token comment\">\/* \u65e0\u786c\u4ef6\u6d41\u63a7 *\/<\/span><br \/>\n    g_uart1_handle<span class=\"token punctuation\">.<\/span>Init<span class=\"token punctuation\">.<\/span>Mode <span class=\"token operator\">&#061;<\/span> UART_MODE_TX_RX<span class=\"token punctuation\">;<\/span>                               <span class=\"token comment\">\/* \u6536\u53d1\u6a21\u5f0f *\/<\/span><br \/>\n    <span class=\"token function\">HAL_UART_Init<\/span><span class=\"token punctuation\">(<\/span><span class=\"token operator\">&amp;<\/span>g_uart1_handle<span class=\"token punctuation\">)<\/span><span class=\"token punctuation\">;<\/span>                                           <span class=\"token comment\">\/* HAL_UART_Init()\u4f1a\u4f7f\u80fdUART1 *\/<\/span><\/p>\n<p>    <span class=\"token comment\">\/* \u8be5\u51fd\u6570\u4f1a\u5f00\u542f\u63a5\u6536\u4e2d\u65ad&#xff1a;\u6807\u5fd7\u4f4dUART_IT_RXNE&#xff0c;\u5e76\u4e14\u8bbe\u7f6e\u63a5\u6536\u7f13\u51b2\u4ee5\u53ca\u63a5\u6536\u7f13\u51b2\u63a5\u6536\u6700\u5927\u6570\u636e\u91cf *\/<\/span><br \/>\n    <span class=\"token function\">HAL_UART_Receive_IT<\/span><span class=\"token punctuation\">(<\/span><span class=\"token operator\">&amp;<\/span>g_uart1_handle<span class=\"token punctuation\">,<\/span> <span class=\"token punctuation\">(<\/span><span class=\"token class-name\">uint8_t<\/span> <span class=\"token operator\">*<\/span><span class=\"token punctuation\">)<\/span>g_rx_buffer<span class=\"token punctuation\">,<\/span> RXBUFFERSIZE<span class=\"token punctuation\">)<\/span><span class=\"token punctuation\">;<\/span><br \/>\n<span class=\"token punctuation\">}<\/span><\/p>\n<p><span class=\"token comment\">\/**<br \/>\n * &#064;brief       UART\u5e95\u5c42\u521d\u59cb\u5316\u51fd\u6570<br \/>\n * &#064;param       huart: UART\u53e5\u67c4\u7c7b\u578b\u6307\u9488<br \/>\n * &#064;note        \u6b64\u51fd\u6570\u4f1a\u88abHAL_UART_Init()\u8c03\u7528<br \/>\n *              \u5b8c\u6210\u65f6\u949f\u4f7f\u80fd&#xff0c;\u5f15\u811a\u914d\u7f6e&#xff0c;\u4e2d\u65ad\u914d\u7f6e<br \/>\n * &#064;retval      \u65e0<br \/>\n *\/<\/span><br \/>\n<span class=\"token keyword\">void<\/span> <span class=\"token function\">HAL_UART_MspInit<\/span><span class=\"token punctuation\">(<\/span>UART_HandleTypeDef <span class=\"token operator\">*<\/span>huart<span class=\"token punctuation\">)<\/span><br \/>\n<span class=\"token punctuation\">{<\/span><br \/>\n    GPIO_InitTypeDef gpio_init_struct<span class=\"token punctuation\">;<\/span><\/p>\n<p>    <span class=\"token keyword\">if<\/span> <span class=\"token punctuation\">(<\/span>huart<span class=\"token operator\">-&gt;<\/span>Instance <span class=\"token operator\">&#061;&#061;<\/span> USART_UX<span class=\"token punctuation\">)<\/span>                            <span class=\"token comment\">\/* \u5982\u679c\u662f\u4e32\u53e31&#xff0c;\u8fdb\u884c\u4e32\u53e31 MSP\u521d\u59cb\u5316 *\/<\/span><br \/>\n    <span class=\"token punctuation\">{<\/span><br \/>\n        <span class=\"token function\">USART_TX_GPIO_CLK_ENABLE<\/span><span class=\"token punctuation\">(<\/span><span class=\"token punctuation\">)<\/span><span class=\"token punctuation\">;<\/span>                             <span class=\"token comment\">\/* \u4f7f\u80fd\u4e32\u53e3TX\u811a\u65f6\u949f *\/<\/span><br \/>\n        <span class=\"token function\">USART_RX_GPIO_CLK_ENABLE<\/span><span class=\"token punctuation\">(<\/span><span class=\"token punctuation\">)<\/span><span class=\"token punctuation\">;<\/span>                             <span class=\"token comment\">\/* \u4f7f\u80fd\u4e32\u53e3RX\u811a\u65f6\u949f *\/<\/span><br \/>\n        <span class=\"token function\">USART_UX_CLK_ENABLE<\/span><span class=\"token punctuation\">(<\/span><span class=\"token punctuation\">)<\/span><span class=\"token punctuation\">;<\/span>                                  <span class=\"token comment\">\/* \u4f7f\u80fd\u4e32\u53e3\u65f6\u949f *\/<\/span><\/p>\n<p>        gpio_init_struct<span class=\"token punctuation\">.<\/span>Pin <span class=\"token operator\">&#061;<\/span> USART_TX_GPIO_PIN<span class=\"token punctuation\">;<\/span>               <span class=\"token comment\">\/* \u4e32\u53e3\u53d1\u9001\u5f15\u811a\u53f7 *\/<\/span><br \/>\n        gpio_init_struct<span class=\"token punctuation\">.<\/span>Mode <span class=\"token operator\">&#061;<\/span> GPIO_MODE_AF_PP<span class=\"token punctuation\">;<\/span>                <span class=\"token comment\">\/* \u590d\u7528\u63a8\u633d\u8f93\u51fa *\/<\/span><br \/>\n        gpio_init_struct<span class=\"token punctuation\">.<\/span>Pull <span class=\"token operator\">&#061;<\/span> GPIO_PULLUP<span class=\"token punctuation\">;<\/span>                    <span class=\"token comment\">\/* \u4e0a\u62c9 *\/<\/span><br \/>\n        gpio_init_struct<span class=\"token punctuation\">.<\/span>Speed <span class=\"token operator\">&#061;<\/span> GPIO_SPEED_FREQ_HIGH<span class=\"token punctuation\">;<\/span>          <span class=\"token comment\">\/* IO\u901f\u5ea6\u8bbe\u7f6e\u4e3a\u9ad8\u901f *\/<\/span><br \/>\n        <span class=\"token function\">HAL_GPIO_Init<\/span><span class=\"token punctuation\">(<\/span>USART_TX_GPIO_PORT<span class=\"token punctuation\">,<\/span> <span class=\"token operator\">&amp;<\/span>gpio_init_struct<span class=\"token punctuation\">)<\/span><span class=\"token punctuation\">;<\/span><\/p>\n<p>        gpio_init_struct<span class=\"token punctuation\">.<\/span>Pin <span class=\"token operator\">&#061;<\/span> USART_RX_GPIO_PIN<span class=\"token punctuation\">;<\/span>               <span class=\"token comment\">\/* \u4e32\u53e3RX\u811a \u6a21\u5f0f\u8bbe\u7f6e *\/<\/span><br \/>\n        gpio_init_struct<span class=\"token punctuation\">.<\/span>Mode <span class=\"token operator\">&#061;<\/span> GPIO_MODE_AF_INPUT<span class=\"token punctuation\">;<\/span><br \/>\n        <span class=\"token function\">HAL_GPIO_Init<\/span><span class=\"token punctuation\">(<\/span>USART_RX_GPIO_PORT<span class=\"token punctuation\">,<\/span> <span class=\"token operator\">&amp;<\/span>gpio_init_struct<span class=\"token punctuation\">)<\/span><span class=\"token punctuation\">;<\/span>   <span class=\"token comment\">\/* \u4e32\u53e3RX\u811a \u5fc5\u987b\u8bbe\u7f6e\u6210\u8f93\u5165\u6a21\u5f0f *\/<\/span><\/p>\n<p><span class=\"token macro property\"><span class=\"token directive-hash\">#<\/span><span class=\"token directive keyword\">if<\/span> <span class=\"token expression\">USART_EN_RX<\/span><\/span><br \/>\n        <span class=\"token function\">HAL_NVIC_EnableIRQ<\/span><span class=\"token punctuation\">(<\/span>USART_UX_IRQn<span class=\"token punctuation\">)<\/span><span class=\"token punctuation\">;<\/span>                      <span class=\"token comment\">\/* \u4f7f\u80fdUSART1\u4e2d\u65ad\u901a\u9053 *\/<\/span><br \/>\n        <span class=\"token function\">HAL_NVIC_SetPriority<\/span><span class=\"token punctuation\">(<\/span>USART_UX_IRQn<span class=\"token punctuation\">,<\/span> <span class=\"token number\">3<\/span><span class=\"token punctuation\">,<\/span> <span class=\"token number\">3<\/span><span class=\"token punctuation\">)<\/span><span class=\"token punctuation\">;<\/span>              <span class=\"token comment\">\/* \u7ec42&#xff0c;\u6700\u4f4e\u4f18\u5148\u7ea7:\u62a2\u5360\u4f18\u5148\u7ea73&#xff0c;\u5b50\u4f18\u5148\u7ea73 *\/<\/span><br \/>\n<span class=\"token macro property\"><span class=\"token directive-hash\">#<\/span><span class=\"token directive keyword\">endif<\/span><\/span><br \/>\n    <span class=\"token punctuation\">}<\/span><br \/>\n<span class=\"token punctuation\">}<\/span><\/p>\n<p><span class=\"token comment\">\/**<br \/>\n * &#064;brief       \u4e32\u53e3\u6570\u636e\u63a5\u6536\u56de\u8c03\u51fd\u6570<br \/>\n                \u6570\u636e\u5904\u7406\u5728\u8fd9\u91cc\u8fdb\u884c<br \/>\n * &#064;param       huart:\u4e32\u53e3\u53e5\u67c4<br \/>\n * &#064;retval      \u65e0<br \/>\n *\/<\/span><br \/>\n<span class=\"token keyword\">void<\/span> <span class=\"token function\">HAL_UART_RxCpltCallback<\/span><span class=\"token punctuation\">(<\/span>UART_HandleTypeDef <span class=\"token operator\">*<\/span>huart<span class=\"token punctuation\">)<\/span><br \/>\n<span class=\"token punctuation\">{<\/span><br \/>\n    <span class=\"token keyword\">if<\/span> <span class=\"token punctuation\">(<\/span>huart<span class=\"token operator\">-&gt;<\/span>Instance <span class=\"token operator\">&#061;&#061;<\/span> USART_UX<span class=\"token punctuation\">)<\/span>                    <span class=\"token comment\">\/* \u5982\u679c\u662f\u4e32\u53e31 *\/<\/span><br \/>\n    <span class=\"token punctuation\">{<\/span><br \/>\n        <span class=\"token keyword\">if<\/span> <span class=\"token punctuation\">(<\/span><span class=\"token punctuation\">(<\/span>g_usart_rx_sta <span class=\"token operator\">&amp;<\/span> <span class=\"token number\">0x8000<\/span><span class=\"token punctuation\">)<\/span> <span class=\"token operator\">&#061;&#061;<\/span> <span class=\"token number\">0<\/span><span class=\"token punctuation\">)<\/span>             <span class=\"token comment\">\/* \u63a5\u6536\u672a\u5b8c\u6210 *\/<\/span><br \/>\n        <span class=\"token punctuation\">{<\/span><br \/>\n            <span class=\"token keyword\">if<\/span> <span class=\"token punctuation\">(<\/span>g_usart_rx_sta <span class=\"token operator\">&amp;<\/span> <span class=\"token number\">0x4000<\/span><span class=\"token punctuation\">)<\/span>                <span class=\"token comment\">\/* \u63a5\u6536\u5230\u4e860x0d&#xff08;\u5373\u56de\u8f66\u952e&#xff09; *\/<\/span><br \/>\n            <span class=\"token punctuation\">{<\/span><br \/>\n                <span class=\"token keyword\">if<\/span> <span class=\"token punctuation\">(<\/span>g_rx_buffer<span class=\"token punctuation\">[<\/span><span class=\"token number\">0<\/span><span class=\"token punctuation\">]<\/span> <span class=\"token operator\">!&#061;<\/span> <span class=\"token number\">0x0a<\/span><span class=\"token punctuation\">)<\/span>             <span class=\"token comment\">\/* \u63a5\u6536\u5230\u7684\u4e0d\u662f0x0a&#xff08;\u5373\u4e0d\u662f\u6362\u884c\u952e&#xff09; *\/<\/span><br \/>\n                <span class=\"token punctuation\">{<\/span><br \/>\n                    g_usart_rx_sta <span class=\"token operator\">&#061;<\/span> <span class=\"token number\">0<\/span><span class=\"token punctuation\">;<\/span>                 <span class=\"token comment\">\/* \u63a5\u6536\u9519\u8bef,\u91cd\u65b0\u5f00\u59cb *\/<\/span><br \/>\n                <span class=\"token punctuation\">}<\/span><br \/>\n                <span class=\"token keyword\">else<\/span>                                    <span class=\"token comment\">\/* \u63a5\u6536\u5230\u7684\u662f0x0a&#xff08;\u5373\u6362\u884c\u952e&#xff09; *\/<\/span><br \/>\n                <span class=\"token punctuation\">{<\/span><br \/>\n                    g_usart_rx_sta <span class=\"token operator\">|&#061;<\/span> <span class=\"token number\">0x8000<\/span><span class=\"token punctuation\">;<\/span>           <span class=\"token comment\">\/* \u63a5\u6536\u5b8c\u6210\u4e86 *\/<\/span><br \/>\n                <span class=\"token punctuation\">}<\/span><br \/>\n            <span class=\"token punctuation\">}<\/span><br \/>\n            <span class=\"token keyword\">else<\/span>                                        <span class=\"token comment\">\/* \u8fd8\u6ca1\u6536\u52300X0d&#xff08;\u5373\u56de\u8f66\u952e&#xff09; *\/<\/span><br \/>\n            <span class=\"token punctuation\">{<\/span><br \/>\n                <span class=\"token keyword\">if<\/span> <span class=\"token punctuation\">(<\/span>g_rx_buffer<span class=\"token punctuation\">[<\/span><span class=\"token number\">0<\/span><span class=\"token punctuation\">]<\/span> <span class=\"token operator\">&#061;&#061;<\/span> <span class=\"token number\">0x0d<\/span><span class=\"token punctuation\">)<\/span><br \/>\n                    g_usart_rx_sta <span class=\"token operator\">|&#061;<\/span> <span class=\"token number\">0x4000<\/span><span class=\"token punctuation\">;<\/span><br \/>\n                <span class=\"token keyword\">else<\/span><br \/>\n                <span class=\"token punctuation\">{<\/span><br \/>\n                    g_usart_rx_buf<span class=\"token punctuation\">[<\/span>g_usart_rx_sta <span class=\"token operator\">&amp;<\/span> <span class=\"token number\">0X3FFF<\/span><span class=\"token punctuation\">]<\/span> <span class=\"token operator\">&#061;<\/span> g_rx_buffer<span class=\"token punctuation\">[<\/span><span class=\"token number\">0<\/span><span class=\"token punctuation\">]<\/span><span class=\"token punctuation\">;<\/span><br \/>\n                    g_usart_rx_sta<span class=\"token operator\">&#043;&#043;<\/span><span class=\"token punctuation\">;<\/span><\/p>\n<p>                    <span class=\"token keyword\">if<\/span> <span class=\"token punctuation\">(<\/span>g_usart_rx_sta <span class=\"token operator\">&gt;<\/span> <span class=\"token punctuation\">(<\/span>USART_REC_LEN <span class=\"token operator\">&#8211;<\/span> <span class=\"token number\">1<\/span><span class=\"token punctuation\">)<\/span><span class=\"token punctuation\">)<\/span><br \/>\n                    <span class=\"token punctuation\">{<\/span><br \/>\n                        g_usart_rx_sta <span class=\"token operator\">&#061;<\/span> <span class=\"token number\">0<\/span><span class=\"token punctuation\">;<\/span>             <span class=\"token comment\">\/* \u63a5\u6536\u6570\u636e\u9519\u8bef,\u91cd\u65b0\u5f00\u59cb\u63a5\u6536 *\/<\/span><br \/>\n                    <span class=\"token punctuation\">}<\/span><br \/>\n                <span class=\"token punctuation\">}<\/span><br \/>\n            <span class=\"token punctuation\">}<\/span><br \/>\n        <span class=\"token punctuation\">}<\/span><br \/>\n    <span class=\"token punctuation\">}<\/span><br \/>\n<span class=\"token punctuation\">}<\/span><\/p>\n<p><span class=\"token comment\">\/**<br \/>\n * &#064;brief       \u4e32\u53e3X\u4e2d\u65ad\u670d\u52a1\u51fd\u6570<br \/>\n                \u6ce8\u610f,\u8bfb\u53d6USARTx-&gt;SR\u80fd\u907f\u514d\u83ab\u540d\u5176\u5999\u7684\u9519\u8bef<br \/>\n * &#064;param       \u65e0<br \/>\n * &#064;retval      \u65e0<br \/>\n *\/<\/span><br \/>\n<span class=\"token keyword\">void<\/span> <span class=\"token function\">USART_UX_IRQHandler<\/span><span class=\"token punctuation\">(<\/span><span class=\"token keyword\">void<\/span><span class=\"token punctuation\">)<\/span><br \/>\n<span class=\"token punctuation\">{<\/span><br \/>\n<span class=\"token macro property\"><span class=\"token directive-hash\">#<\/span><span class=\"token directive keyword\">if<\/span> <span class=\"token expression\">SYSTEM_SUPPORT_OS                                                   <\/span><span class=\"token comment\">\/* \u4f7f\u7528OS *\/<\/span><\/span><br \/>\n    <span class=\"token function\">OSIntEnter<\/span><span class=\"token punctuation\">(<\/span><span class=\"token punctuation\">)<\/span><span class=\"token punctuation\">;<\/span><br \/>\n<span class=\"token macro property\"><span class=\"token directive-hash\">#<\/span><span class=\"token directive keyword\">endif<\/span><\/span><br \/>\n    <span class=\"token function\">HAL_UART_IRQHandler<\/span><span class=\"token punctuation\">(<\/span><span class=\"token operator\">&amp;<\/span>g_uart1_handle<span class=\"token punctuation\">)<\/span><span class=\"token punctuation\">;<\/span>                               <span class=\"token comment\">\/* \u8c03\u7528HAL\u5e93\u4e2d\u65ad\u5904\u7406\u516c\u7528\u51fd\u6570 *\/<\/span><\/p>\n<p>    <span class=\"token keyword\">while<\/span> <span class=\"token punctuation\">(<\/span><span class=\"token function\">HAL_UART_Receive_IT<\/span><span class=\"token punctuation\">(<\/span><span class=\"token operator\">&amp;<\/span>g_uart1_handle<span class=\"token punctuation\">,<\/span> <span class=\"token punctuation\">(<\/span><span class=\"token class-name\">uint8_t<\/span> <span class=\"token operator\">*<\/span><span class=\"token punctuation\">)<\/span>g_rx_buffer<span class=\"token punctuation\">,<\/span> RXBUFFERSIZE<span class=\"token punctuation\">)<\/span> <span class=\"token operator\">!&#061;<\/span> HAL_OK<span class=\"token punctuation\">)<\/span>     <span class=\"token comment\">\/* \u91cd\u65b0\u5f00\u542f\u4e2d\u65ad\u5e76\u63a5\u6536\u6570\u636e *\/<\/span><br \/>\n    <span class=\"token punctuation\">{<\/span><br \/>\n        <span class=\"token comment\">\/* \u5982\u679c\u51fa\u9519\u4f1a\u5361\u6b7b\u5728\u8fd9\u91cc *\/<\/span><br \/>\n    <span class=\"token punctuation\">}<\/span><\/p>\n<p><span class=\"token macro property\"><span class=\"token directive-hash\">#<\/span><span class=\"token directive keyword\">if<\/span> <span class=\"token expression\">SYSTEM_SUPPORT_OS                                                   <\/span><span class=\"token comment\">\/* \u4f7f\u7528OS *\/<\/span><\/span><br \/>\n    <span class=\"token function\">OSIntExit<\/span><span class=\"token punctuation\">(<\/span><span class=\"token punctuation\">)<\/span><span class=\"token punctuation\">;<\/span><br \/>\n<span class=\"token macro property\"><span class=\"token directive-hash\">#<\/span><span class=\"token directive keyword\">endif<\/span><\/span><br \/>\n<span class=\"token punctuation\">}<\/span><br \/>\n<span class=\"token macro property\"><span class=\"token directive-hash\">#<\/span><span class=\"token directive keyword\">endif<\/span><\/span><\/p>\n<p><font color=\"red\">usart.h<\/font><\/p>\n<p><span class=\"token macro property\"><span class=\"token directive-hash\">#<\/span><span class=\"token directive keyword\">ifndef<\/span> <span class=\"token expression\">__USART_H<\/span><\/span><br \/>\n<span class=\"token macro property\"><span class=\"token directive-hash\">#<\/span><span class=\"token directive keyword\">define<\/span> <span class=\"token macro-name\">__USART_H<\/span><\/span><\/p>\n<p><span class=\"token macro property\"><span class=\"token directive-hash\">#<\/span><span class=\"token directive keyword\">include<\/span> <span class=\"token string\">&#034;stdio.h&#034;<\/span><\/span><br \/>\n<span class=\"token macro property\"><span class=\"token directive-hash\">#<\/span><span class=\"token directive keyword\">include<\/span> <span class=\"token string\">&#034;.\/SYSTEM\/sys\/sys.h&#034;<\/span><\/span><\/p>\n<p><span class=\"token comment\">\/******************************************************************************************\/<\/span><br \/>\n<span class=\"token comment\">\/* \u5f15\u811a \u548c \u4e32\u53e3 \u5b9a\u4e49<br \/>\n * \u9ed8\u8ba4\u662f\u9488\u5bf9USART1\u7684.<br \/>\n * \u6ce8\u610f: \u901a\u8fc7\u4fee\u6539\u8fd9\u51e0\u4e2a\u5b8f\u5b9a\u4e49,\u53ef\u4ee5\u652f\u6301USART1~UART5\u4efb\u610f\u4e00\u4e2a\u4e32\u53e3.<br \/>\n *\/<\/span><br \/>\n<span class=\"token macro property\"><span class=\"token directive-hash\">#<\/span><span class=\"token directive keyword\">define<\/span> <span class=\"token macro-name\">USART_TX_GPIO_PORT<\/span>                  <span class=\"token expression\">GPIOA<\/span><\/span><br \/>\n<span class=\"token macro property\"><span class=\"token directive-hash\">#<\/span><span class=\"token directive keyword\">define<\/span> <span class=\"token macro-name\">USART_TX_GPIO_PIN<\/span>                   <span class=\"token expression\">GPIO_PIN_9<\/span><\/span><br \/>\n<span class=\"token macro property\"><span class=\"token directive-hash\">#<\/span><span class=\"token directive keyword\">define<\/span> <span class=\"token macro-name function\">USART_TX_GPIO_CLK_ENABLE<\/span><span class=\"token expression\"><span class=\"token punctuation\">(<\/span><span class=\"token punctuation\">)<\/span>          <span class=\"token keyword\">do<\/span><span class=\"token punctuation\">{<\/span> <span class=\"token function\">__HAL_RCC_GPIOA_CLK_ENABLE<\/span><span class=\"token punctuation\">(<\/span><span class=\"token punctuation\">)<\/span><span class=\"token punctuation\">;<\/span> <span class=\"token punctuation\">}<\/span><span class=\"token keyword\">while<\/span><span class=\"token punctuation\">(<\/span><span class=\"token number\">0<\/span><span class=\"token punctuation\">)<\/span>   <\/span><span class=\"token comment\">\/* PA\u53e3\u65f6\u949f\u4f7f\u80fd *\/<\/span><\/span><\/p>\n<p><span class=\"token macro property\"><span class=\"token directive-hash\">#<\/span><span class=\"token directive keyword\">define<\/span> <span class=\"token macro-name\">USART_RX_GPIO_PORT<\/span>                  <span class=\"token expression\">GPIOA<\/span><\/span><br \/>\n<span class=\"token macro property\"><span class=\"token directive-hash\">#<\/span><span class=\"token directive keyword\">define<\/span> <span class=\"token macro-name\">USART_RX_GPIO_PIN<\/span>                   <span class=\"token expression\">GPIO_PIN_10<\/span><\/span><br \/>\n<span class=\"token macro property\"><span class=\"token directive-hash\">#<\/span><span class=\"token directive keyword\">define<\/span> <span class=\"token macro-name function\">USART_RX_GPIO_CLK_ENABLE<\/span><span class=\"token expression\"><span class=\"token punctuation\">(<\/span><span class=\"token punctuation\">)<\/span>          <span class=\"token keyword\">do<\/span><span class=\"token punctuation\">{<\/span> <span class=\"token function\">__HAL_RCC_GPIOA_CLK_ENABLE<\/span><span class=\"token punctuation\">(<\/span><span class=\"token punctuation\">)<\/span><span class=\"token punctuation\">;<\/span> <span class=\"token punctuation\">}<\/span><span class=\"token keyword\">while<\/span><span class=\"token punctuation\">(<\/span><span class=\"token number\">0<\/span><span class=\"token punctuation\">)<\/span>   <\/span><span class=\"token comment\">\/* PA\u53e3\u65f6\u949f\u4f7f\u80fd *\/<\/span><\/span><\/p>\n<p><span class=\"token macro property\"><span class=\"token directive-hash\">#<\/span><span class=\"token directive keyword\">define<\/span> <span class=\"token macro-name\">USART_UX<\/span>                            <span class=\"token expression\">USART1<\/span><\/span><br \/>\n<span class=\"token macro property\"><span class=\"token directive-hash\">#<\/span><span class=\"token directive keyword\">define<\/span> <span class=\"token macro-name\">USART_UX_IRQn<\/span>                       <span class=\"token expression\">USART1_IRQn<\/span><\/span><br \/>\n<span class=\"token macro property\"><span class=\"token directive-hash\">#<\/span><span class=\"token directive keyword\">define<\/span> <span class=\"token macro-name\">USART_UX_IRQHandler<\/span>                 <span class=\"token expression\">USART1_IRQHandler<\/span><\/span><br \/>\n<span class=\"token macro property\"><span class=\"token directive-hash\">#<\/span><span class=\"token directive keyword\">define<\/span> <span class=\"token macro-name function\">USART_UX_CLK_ENABLE<\/span><span class=\"token expression\"><span class=\"token punctuation\">(<\/span><span class=\"token punctuation\">)<\/span>               <span class=\"token keyword\">do<\/span><span class=\"token punctuation\">{<\/span> <span class=\"token function\">__HAL_RCC_USART1_CLK_ENABLE<\/span><span class=\"token punctuation\">(<\/span><span class=\"token punctuation\">)<\/span><span class=\"token punctuation\">;<\/span> <span class=\"token punctuation\">}<\/span><span class=\"token keyword\">while<\/span><span class=\"token punctuation\">(<\/span><span class=\"token number\">0<\/span><span class=\"token punctuation\">)<\/span>  <\/span><span class=\"token comment\">\/* USART1 \u65f6\u949f\u4f7f\u80fd *\/<\/span><\/span><\/p>\n<p><span class=\"token comment\">\/******************************************************************************************\/<\/span><\/p>\n<p><span class=\"token macro property\"><span class=\"token directive-hash\">#<\/span><span class=\"token directive keyword\">define<\/span> <span class=\"token macro-name\">USART_REC_LEN<\/span>               <span class=\"token expression\"><span class=\"token number\">200<\/span>         <\/span><span class=\"token comment\">\/* \u5b9a\u4e49\u6700\u5927\u63a5\u6536\u5b57\u8282\u6570 200 *\/<\/span><\/span><br \/>\n<span class=\"token macro property\"><span class=\"token directive-hash\">#<\/span><span class=\"token directive keyword\">define<\/span> <span class=\"token macro-name\">USART_EN_RX<\/span>                 <span class=\"token expression\"><span class=\"token number\">1<\/span>           <\/span><span class=\"token comment\">\/* \u4f7f\u80fd&#xff08;1&#xff09;\/\u7981\u6b62&#xff08;0&#xff09;\u4e32\u53e31\u63a5\u6536 *\/<\/span><\/span><br \/>\n<span class=\"token macro property\"><span class=\"token directive-hash\">#<\/span><span class=\"token directive keyword\">define<\/span> <span class=\"token macro-name\">RXBUFFERSIZE<\/span>   <span class=\"token expression\"><span class=\"token number\">1<\/span>                        <\/span><span class=\"token comment\">\/* \u7f13\u5b58\u5927\u5c0f *\/<\/span><\/span><\/p>\n<p><span class=\"token keyword\">extern<\/span> UART_HandleTypeDef g_uart1_handle<span class=\"token punctuation\">;<\/span>       <span class=\"token comment\">\/* HAL UART\u53e5\u67c4 *\/<\/span><\/p>\n<p><span class=\"token keyword\">extern<\/span> <span class=\"token class-name\">uint8_t<\/span>  g_usart_rx_buf<span class=\"token punctuation\">[<\/span>USART_REC_LEN<span class=\"token punctuation\">]<\/span><span class=\"token punctuation\">;<\/span>  <span class=\"token comment\">\/* \u63a5\u6536\u7f13\u51b2,\u6700\u5927USART_REC_LEN\u4e2a\u5b57\u8282.\u672b\u5b57\u8282\u4e3a\u6362\u884c\u7b26 *\/<\/span><br \/>\n<span class=\"token keyword\">extern<\/span> <span class=\"token class-name\">uint16_t<\/span> g_usart_rx_sta<span class=\"token punctuation\">;<\/span>                 <span class=\"token comment\">\/* \u63a5\u6536\u72b6\u6001\u6807\u8bb0 *\/<\/span><br \/>\n<span class=\"token keyword\">extern<\/span> <span class=\"token class-name\">uint8_t<\/span> g_rx_buffer<span class=\"token punctuation\">[<\/span>RXBUFFERSIZE<span class=\"token punctuation\">]<\/span><span class=\"token punctuation\">;<\/span>       <span class=\"token comment\">\/* HAL\u5e93USART\u63a5\u6536Buffer *\/<\/span><\/p>\n<p><span class=\"token keyword\">void<\/span> <span class=\"token function\">usart_init<\/span><span class=\"token punctuation\">(<\/span><span class=\"token class-name\">uint32_t<\/span> bound<span class=\"token punctuation\">)<\/span><span class=\"token punctuation\">;<\/span>                <span class=\"token comment\">\/* \u4e32\u53e3\u521d\u59cb\u5316\u51fd\u6570 *\/<\/span><\/p>\n<p><span class=\"token macro property\"><span class=\"token directive-hash\">#<\/span><span class=\"token directive keyword\">endif<\/span><\/span><\/p>\n<p><font color=\"red\">main.c<\/font><\/p>\n<p><span class=\"token macro property\"><span class=\"token directive-hash\">#<\/span><span class=\"token directive keyword\">include<\/span> <span class=\"token string\">&#034;.\/SYSTEM\/sys\/sys.h&#034;<\/span><\/span><br \/>\n<span class=\"token macro property\"><span class=\"token directive-hash\">#<\/span><span class=\"token directive keyword\">include<\/span> <span class=\"token string\">&#034;.\/SYSTEM\/usart\/usart.h&#034;<\/span><\/span><br \/>\n<span class=\"token macro property\"><span class=\"token directive-hash\">#<\/span><span class=\"token directive keyword\">include<\/span> <span class=\"token string\">&#034;.\/SYSTEM\/delay\/delay.h&#034;<\/span><\/span><br \/>\n<span class=\"token macro property\"><span class=\"token directive-hash\">#<\/span><span class=\"token directive keyword\">include<\/span> <span class=\"token string\">&#034;.\/USMART\/usmart.h&#034;<\/span><\/span><br \/>\n<span class=\"token macro property\"><span class=\"token directive-hash\">#<\/span><span class=\"token directive keyword\">include<\/span> <span class=\"token string\">&#034;.\/BSP\/LED\/led.h&#034;<\/span><\/span><br \/>\n<span class=\"token macro property\"><span class=\"token directive-hash\">#<\/span><span class=\"token directive keyword\">include<\/span> <span class=\"token string\">&#034;.\/BSP\/LCD\/lcd.h&#034;<\/span><\/span><br \/>\n<span class=\"token macro property\"><span class=\"token directive-hash\">#<\/span><span class=\"token directive keyword\">include<\/span> <span class=\"token string\">&#034;.\/BSP\/KEY\/key.h&#034;<\/span><\/span><br \/>\n<span class=\"token macro property\"><span class=\"token directive-hash\">#<\/span><span class=\"token directive keyword\">include<\/span> <span class=\"token string\">&#034;.\/BSP\/RS485\/rs485.h&#034;<\/span><\/span><\/p>\n<p><span class=\"token keyword\">int<\/span> <span class=\"token function\">main<\/span><span class=\"token punctuation\">(<\/span><span class=\"token keyword\">void<\/span><span class=\"token punctuation\">)<\/span><br \/>\n<span class=\"token punctuation\">{<\/span><br \/>\n    <span class=\"token class-name\">uint8_t<\/span> key<span class=\"token punctuation\">;<\/span><br \/>\n    <span class=\"token class-name\">uint8_t<\/span> i <span class=\"token operator\">&#061;<\/span> <span class=\"token number\">0<\/span><span class=\"token punctuation\">,<\/span> t <span class=\"token operator\">&#061;<\/span> <span class=\"token number\">0<\/span><span class=\"token punctuation\">;<\/span><br \/>\n    <span class=\"token class-name\">uint8_t<\/span> cnt <span class=\"token operator\">&#061;<\/span> <span class=\"token number\">0<\/span><span class=\"token punctuation\">;<\/span><br \/>\n    <span class=\"token class-name\">uint8_t<\/span> rs485buf<span class=\"token punctuation\">[<\/span><span class=\"token number\">5<\/span><span class=\"token punctuation\">]<\/span><span class=\"token punctuation\">;<\/span><\/p>\n<p>    <span class=\"token function\">HAL_Init<\/span><span class=\"token punctuation\">(<\/span><span class=\"token punctuation\">)<\/span><span class=\"token punctuation\">;<\/span>                                 <span class=\"token comment\">\/* \u521d\u59cb\u5316HAL\u5e93 *\/<\/span><br \/>\n    <span class=\"token function\">sys_stm32_clock_init<\/span><span class=\"token punctuation\">(<\/span>RCC_PLL_MUL9<span class=\"token punctuation\">)<\/span><span class=\"token punctuation\">;<\/span>         <span class=\"token comment\">\/* \u8bbe\u7f6e\u65f6\u949f, 72Mhz *\/<\/span><br \/>\n    <span class=\"token function\">delay_init<\/span><span class=\"token punctuation\">(<\/span><span class=\"token number\">72<\/span><span class=\"token punctuation\">)<\/span><span class=\"token punctuation\">;<\/span>                             <span class=\"token comment\">\/* \u5ef6\u65f6\u521d\u59cb\u5316 *\/<\/span><br \/>\n    <span class=\"token function\">usart_init<\/span><span class=\"token punctuation\">(<\/span><span class=\"token number\">115200<\/span><span class=\"token punctuation\">)<\/span><span class=\"token punctuation\">;<\/span>                         <span class=\"token comment\">\/* \u4e32\u53e3\u521d\u59cb\u5316\u4e3a115200 *\/<\/span><br \/>\n    usmart_dev<span class=\"token punctuation\">.<\/span><span class=\"token function\">init<\/span><span class=\"token punctuation\">(<\/span><span class=\"token number\">72<\/span><span class=\"token punctuation\">)<\/span><span class=\"token punctuation\">;<\/span>                        <span class=\"token comment\">\/* \u521d\u59cb\u5316USMART *\/<\/span><br \/>\n    <span class=\"token function\">led_init<\/span><span class=\"token punctuation\">(<\/span><span class=\"token punctuation\">)<\/span><span class=\"token punctuation\">;<\/span>                                 <span class=\"token comment\">\/* \u521d\u59cb\u5316LED *\/<\/span><br \/>\n    <span class=\"token function\">lcd_init<\/span><span class=\"token punctuation\">(<\/span><span class=\"token punctuation\">)<\/span><span class=\"token punctuation\">;<\/span>                                 <span class=\"token comment\">\/* \u521d\u59cb\u5316LCD *\/<\/span><br \/>\n    <span class=\"token function\">key_init<\/span><span class=\"token punctuation\">(<\/span><span class=\"token punctuation\">)<\/span><span class=\"token punctuation\">;<\/span>                                 <span class=\"token comment\">\/* \u521d\u59cb\u5316\u6309\u952e *\/<\/span><br \/>\n    <span class=\"token function\">rs485_init<\/span><span class=\"token punctuation\">(<\/span><span class=\"token number\">9600<\/span><span class=\"token punctuation\">)<\/span><span class=\"token punctuation\">;<\/span>                           <span class=\"token comment\">\/* \u521d\u59cb\u5316RS485 *\/<\/span><\/p>\n<p>    <span class=\"token function\">lcd_show_string<\/span><span class=\"token punctuation\">(<\/span><span class=\"token number\">30<\/span><span class=\"token punctuation\">,<\/span>  <span class=\"token number\">50<\/span><span class=\"token punctuation\">,<\/span> <span class=\"token number\">200<\/span><span class=\"token punctuation\">,<\/span> <span class=\"token number\">16<\/span><span class=\"token punctuation\">,<\/span> <span class=\"token number\">16<\/span><span class=\"token punctuation\">,<\/span> <span class=\"token string\">&#034;STM32&#034;<\/span><span class=\"token punctuation\">,<\/span> RED<span class=\"token punctuation\">)<\/span><span class=\"token punctuation\">;<\/span><br \/>\n    <span class=\"token function\">lcd_show_string<\/span><span class=\"token punctuation\">(<\/span><span class=\"token number\">30<\/span><span class=\"token punctuation\">,<\/span>  <span class=\"token number\">70<\/span><span class=\"token punctuation\">,<\/span> <span class=\"token number\">200<\/span><span class=\"token punctuation\">,<\/span> <span class=\"token number\">16<\/span><span class=\"token punctuation\">,<\/span> <span class=\"token number\">16<\/span><span class=\"token punctuation\">,<\/span> <span class=\"token string\">&#034;RS485 TEST&#034;<\/span><span class=\"token punctuation\">,<\/span> RED<span class=\"token punctuation\">)<\/span><span class=\"token punctuation\">;<\/span><br \/>\n    <span class=\"token function\">lcd_show_string<\/span><span class=\"token punctuation\">(<\/span><span class=\"token number\">30<\/span><span class=\"token punctuation\">,<\/span>  <span class=\"token number\">90<\/span><span class=\"token punctuation\">,<\/span> <span class=\"token number\">200<\/span><span class=\"token punctuation\">,<\/span> <span class=\"token number\">16<\/span><span class=\"token punctuation\">,<\/span> <span class=\"token number\">16<\/span><span class=\"token punctuation\">,<\/span> <span class=\"token string\">&#034;ATOM&#064;ALIENTEK&#034;<\/span><span class=\"token punctuation\">,<\/span> RED<span class=\"token punctuation\">)<\/span><span class=\"token punctuation\">;<\/span><br \/>\n    <span class=\"token function\">lcd_show_string<\/span><span class=\"token punctuation\">(<\/span><span class=\"token number\">30<\/span><span class=\"token punctuation\">,<\/span> <span class=\"token number\">110<\/span><span class=\"token punctuation\">,<\/span> <span class=\"token number\">200<\/span><span class=\"token punctuation\">,<\/span> <span class=\"token number\">16<\/span><span class=\"token punctuation\">,<\/span> <span class=\"token number\">16<\/span><span class=\"token punctuation\">,<\/span> <span class=\"token string\">&#034;KEY0:Send&#034;<\/span><span class=\"token punctuation\">,<\/span> RED<span class=\"token punctuation\">)<\/span><span class=\"token punctuation\">;<\/span>    <span class=\"token comment\">\/* \u663e\u793a\u63d0\u793a\u4fe1\u606f *\/<\/span><\/p>\n<p>    <span class=\"token function\">lcd_show_string<\/span><span class=\"token punctuation\">(<\/span><span class=\"token number\">30<\/span><span class=\"token punctuation\">,<\/span> <span class=\"token number\">130<\/span><span class=\"token punctuation\">,<\/span> <span class=\"token number\">200<\/span><span class=\"token punctuation\">,<\/span> <span class=\"token number\">16<\/span><span class=\"token punctuation\">,<\/span> <span class=\"token number\">16<\/span><span class=\"token punctuation\">,<\/span> <span class=\"token string\">&#034;Count:&#034;<\/span><span class=\"token punctuation\">,<\/span> RED<span class=\"token punctuation\">)<\/span><span class=\"token punctuation\">;<\/span>       <span class=\"token comment\">\/* \u663e\u793a\u5f53\u524d\u8ba1\u6570\u503c *\/<\/span><br \/>\n    <span class=\"token function\">lcd_show_string<\/span><span class=\"token punctuation\">(<\/span><span class=\"token number\">30<\/span><span class=\"token punctuation\">,<\/span> <span class=\"token number\">150<\/span><span class=\"token punctuation\">,<\/span> <span class=\"token number\">200<\/span><span class=\"token punctuation\">,<\/span> <span class=\"token number\">16<\/span><span class=\"token punctuation\">,<\/span> <span class=\"token number\">16<\/span><span class=\"token punctuation\">,<\/span> <span class=\"token string\">&#034;Send Data:&#034;<\/span><span class=\"token punctuation\">,<\/span> RED<span class=\"token punctuation\">)<\/span><span class=\"token punctuation\">;<\/span>   <span class=\"token comment\">\/* \u63d0\u793a\u53d1\u9001\u7684\u6570\u636e *\/<\/span><br \/>\n    <span class=\"token function\">lcd_show_string<\/span><span class=\"token punctuation\">(<\/span><span class=\"token number\">30<\/span><span class=\"token punctuation\">,<\/span> <span class=\"token number\">190<\/span><span class=\"token punctuation\">,<\/span> <span class=\"token number\">200<\/span><span class=\"token punctuation\">,<\/span> <span class=\"token number\">16<\/span><span class=\"token punctuation\">,<\/span> <span class=\"token number\">16<\/span><span class=\"token punctuation\">,<\/span> <span class=\"token string\">&#034;Receive Data:&#034;<\/span><span class=\"token punctuation\">,<\/span> RED<span class=\"token punctuation\">)<\/span><span class=\"token punctuation\">;<\/span><span class=\"token comment\">\/* \u63d0\u793a\u63a5\u6536\u5230\u7684\u6570\u636e *\/<\/span><\/p>\n<p>    <span class=\"token keyword\">while<\/span> <span class=\"token punctuation\">(<\/span><span class=\"token number\">1<\/span><span class=\"token punctuation\">)<\/span><br \/>\n    <span class=\"token punctuation\">{<\/span><br \/>\n        key <span class=\"token operator\">&#061;<\/span> <span class=\"token function\">key_scan<\/span><span class=\"token punctuation\">(<\/span><span class=\"token number\">0<\/span><span class=\"token punctuation\">)<\/span><span class=\"token punctuation\">;<\/span><\/p>\n<p>        <span class=\"token keyword\">if<\/span> <span class=\"token punctuation\">(<\/span>key <span class=\"token operator\">&#061;&#061;<\/span> KEY0_PRES<span class=\"token punctuation\">)<\/span>   <span class=\"token comment\">\/* KEY0\u6309\u4e0b,\u53d1\u9001\u4e00\u6b21\u6570\u636e *\/<\/span><br \/>\n        <span class=\"token punctuation\">{<\/span><br \/>\n            <span class=\"token keyword\">for<\/span> <span class=\"token punctuation\">(<\/span>i <span class=\"token operator\">&#061;<\/span> <span class=\"token number\">0<\/span><span class=\"token punctuation\">;<\/span> i <span class=\"token operator\">&lt;<\/span> <span class=\"token number\">5<\/span><span class=\"token punctuation\">;<\/span> i<span class=\"token operator\">&#043;&#043;<\/span><span class=\"token punctuation\">)<\/span><br \/>\n            <span class=\"token punctuation\">{<\/span><br \/>\n                rs485buf<span class=\"token punctuation\">[<\/span>i<span class=\"token punctuation\">]<\/span> <span class=\"token operator\">&#061;<\/span> cnt <span class=\"token operator\">&#043;<\/span> i<span class=\"token punctuation\">;<\/span>      <span class=\"token comment\">\/* \u586b\u5145\u53d1\u9001\u7f13\u51b2\u533a *\/<\/span><br \/>\n                <span class=\"token function\">lcd_show_xnum<\/span><span class=\"token punctuation\">(<\/span><span class=\"token number\">30<\/span> <span class=\"token operator\">&#043;<\/span> i <span class=\"token operator\">*<\/span> <span class=\"token number\">32<\/span><span class=\"token punctuation\">,<\/span> <span class=\"token number\">170<\/span><span class=\"token punctuation\">,<\/span> rs485buf<span class=\"token punctuation\">[<\/span>i<span class=\"token punctuation\">]<\/span><span class=\"token punctuation\">,<\/span> <span class=\"token number\">3<\/span><span class=\"token punctuation\">,<\/span> <span class=\"token number\">16<\/span><span class=\"token punctuation\">,<\/span> <span class=\"token number\">0X80<\/span><span class=\"token punctuation\">,<\/span> BLUE<span class=\"token punctuation\">)<\/span><span class=\"token punctuation\">;<\/span>    <span class=\"token comment\">\/* \u663e\u793a\u6570\u636e *\/<\/span><br \/>\n            <span class=\"token punctuation\">}<\/span><\/p>\n<p>            <span class=\"token function\">rs485_send_data<\/span><span class=\"token punctuation\">(<\/span>rs485buf<span class=\"token punctuation\">,<\/span> <span class=\"token number\">5<\/span><span class=\"token punctuation\">)<\/span><span class=\"token punctuation\">;<\/span>   <span class=\"token comment\">\/* \u53d1\u90015\u4e2a\u5b57\u8282 *\/<\/span><br \/>\n        <span class=\"token punctuation\">}<\/span><\/p>\n<p>        <span class=\"token function\">rs485_receive_data<\/span><span class=\"token punctuation\">(<\/span>rs485buf<span class=\"token punctuation\">,<\/span> <span class=\"token operator\">&amp;<\/span>key<span class=\"token punctuation\">)<\/span><span class=\"token punctuation\">;<\/span><\/p>\n<p>        <span class=\"token keyword\">if<\/span> <span class=\"token punctuation\">(<\/span>key<span class=\"token punctuation\">)<\/span>    <span class=\"token comment\">\/* \u63a5\u6536\u5230\u6709\u6570\u636e *\/<\/span><br \/>\n        <span class=\"token punctuation\">{<\/span><br \/>\n            <span class=\"token keyword\">if<\/span> <span class=\"token punctuation\">(<\/span>key <span class=\"token operator\">&gt;<\/span> <span class=\"token number\">5<\/span><span class=\"token punctuation\">)<\/span> key <span class=\"token operator\">&#061;<\/span> <span class=\"token number\">5<\/span><span class=\"token punctuation\">;<\/span>    <span class=\"token comment\">\/* \u6700\u5927\u662f5\u4e2a\u6570\u636e. *\/<\/span><\/p>\n<p>            <span class=\"token keyword\">for<\/span> <span class=\"token punctuation\">(<\/span>i <span class=\"token operator\">&#061;<\/span> <span class=\"token number\">0<\/span><span class=\"token punctuation\">;<\/span> i <span class=\"token operator\">&lt;<\/span> key<span class=\"token punctuation\">;<\/span> i<span class=\"token operator\">&#043;&#043;<\/span><span class=\"token punctuation\">)<\/span><br \/>\n            <span class=\"token punctuation\">{<\/span><br \/>\n                <span class=\"token function\">lcd_show_xnum<\/span><span class=\"token punctuation\">(<\/span><span class=\"token number\">30<\/span> <span class=\"token operator\">&#043;<\/span> i <span class=\"token operator\">*<\/span> <span class=\"token number\">32<\/span><span class=\"token punctuation\">,<\/span> <span class=\"token number\">210<\/span><span class=\"token punctuation\">,<\/span> rs485buf<span class=\"token punctuation\">[<\/span>i<span class=\"token punctuation\">]<\/span><span class=\"token punctuation\">,<\/span> <span class=\"token number\">3<\/span><span class=\"token punctuation\">,<\/span> <span class=\"token number\">16<\/span><span class=\"token punctuation\">,<\/span> <span class=\"token number\">0X80<\/span><span class=\"token punctuation\">,<\/span> BLUE<span class=\"token punctuation\">)<\/span><span class=\"token punctuation\">;<\/span>    <span class=\"token comment\">\/* \u663e\u793a\u6570\u636e *\/<\/span><br \/>\n            <span class=\"token punctuation\">}<\/span><br \/>\n        <span class=\"token punctuation\">}<\/span><\/p>\n<p>        t<span class=\"token operator\">&#043;&#043;<\/span><span class=\"token punctuation\">;<\/span><br \/>\n        <span class=\"token function\">delay_ms<\/span><span class=\"token punctuation\">(<\/span><span class=\"token number\">10<\/span><span class=\"token punctuation\">)<\/span><span class=\"token punctuation\">;<\/span><\/p>\n<p>        <span class=\"token keyword\">if<\/span> <span class=\"token punctuation\">(<\/span>t <span class=\"token operator\">&#061;&#061;<\/span> <span class=\"token number\">20<\/span><span class=\"token punctuation\">)<\/span><br \/>\n        <span class=\"token punctuation\">{<\/span><br \/>\n            <span class=\"token function\">LED0_TOGGLE<\/span><span class=\"token punctuation\">(<\/span><span class=\"token punctuation\">)<\/span><span class=\"token punctuation\">;<\/span>  <span class=\"token comment\">\/* LED0\u95ea\u70c1, \u63d0\u793a\u7cfb\u7edf\u6b63\u5728\u8fd0\u884c *\/<\/span><br \/>\n            t <span class=\"token operator\">&#061;<\/span> <span class=\"token number\">0<\/span><span class=\"token punctuation\">;<\/span><br \/>\n            cnt<span class=\"token operator\">&#043;&#043;<\/span><span class=\"token punctuation\">;<\/span><br \/>\n            <span class=\"token function\">lcd_show_xnum<\/span><span class=\"token punctuation\">(<\/span><span class=\"token number\">30<\/span> <span class=\"token operator\">&#043;<\/span> <span class=\"token number\">48<\/span><span class=\"token punctuation\">,<\/span> <span class=\"token number\">130<\/span><span class=\"token punctuation\">,<\/span> cnt<span class=\"token punctuation\">,<\/span> <span class=\"token number\">3<\/span><span class=\"token punctuation\">,<\/span> <span class=\"token number\">16<\/span><span class=\"token punctuation\">,<\/span> <span class=\"token number\">0X80<\/span><span class=\"token punctuation\">,<\/span> BLUE<span class=\"token punctuation\">)<\/span><span class=\"token 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src=\"https:\/\/www.wsisp.com\/helps\/wp-content\/uploads\/2025\/06\/20250611005515-6848d3f32f2bd.png\" alt=\"\u5728\u8fd9\u91cc\u63d2\u5165\u56fe\u7247\u63cf\u8ff0\" \/> <img decoding=\"async\" src=\"https:\/\/www.wsisp.com\/helps\/wp-content\/uploads\/2025\/06\/20250611005515-6848d3f3c92ea.png\" alt=\"\u5728\u8fd9\u91cc\u63d2\u5165\u56fe\u7247\u63cf\u8ff0\" 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