{"id":10020506,"date":"2024-12-18T22:58:15","date_gmt":"2024-12-18T14:58:15","guid":{"rendered":"https:\/\/itmax.cn\/?p=10020506"},"modified":"2024-12-18T22:58:15","modified_gmt":"2024-12-18T14:58:15","slug":"%e6%b8%a9%e5%ba%a6%e4%bc%a0%e6%84%9f%e5%99%a8ds18b20%e8%af%a6%e8%a7%a3","status":"publish","type":"post","link":"https:\/\/itmax.cn\/?p=10020506","title":{"rendered":"\u6e29\u5ea6\u4f20\u611f\u5668DS18B20\u8be6\u89e3"},"content":{"rendered":"<p>\u524d\u9762\u6211\u4eec\u5b66\u4e60 DHT11 \u7684\u65f6\u5019\u63d0\u5230\u4e86 DS18B20\uff0c\u5b83\u6709\u5f88\u5bbd\u7684\u6d4b\u6e29\u8303\u56f4\uff0c-55\u00b0C ~ 125\u00b0C\u3002\u90a3\u4e48\u672c\u6b21\u6211\u4eec\u5c31\u6765\u8be6\u7ec6\u4ecb\u7ecd\u4e00\u4e0b DS18B20\u3002<\/p>\n<p>DS18B20 \u662f\u4e00\u79cd\u5355\u603b\u7ebf\u6570\u5b57\u6e29\u5ea6\u4f20\u611f\u5668\uff0c\u5b83\u88ab\u5e7f\u6cdb\u5e94\u7528\u4e8e\u5404\u79cd\u9886\u57df\uff0c\u4f8b\u5982\u6c14\u8c61\u76d1\u6d4b\u3001\u5ba4\u5185\u6e29\u5ea6\u63a7\u5236\u3001\u5de5\u4e1a\u81ea\u52a8\u5316\u7b49\u3002DS18B20 \u91c7\u7528\u4e86\u5355\u603b\u7ebf\u63a5\u53e3\uff08One-Wire Interface\uff09\uff0c\u8fd9\u610f\u5473\u7740\u53ef\u4ee5\u901a\u8fc7\u5355\u4e2a\u5f15\u811a\u4e0e\u5fae\u63a7\u5236\u5668\u901a\u4fe1\uff0c\u5927\u5927\u7b80\u5316\u4e86\u8fde\u63a5\u548c\u5e03\u7ebf\u3002<\/p>\n<p>\u5728\u672c\u6587\u4e2d\uff0c\u6211\u4eec\u5c06\u4ecb\u7ecd DS18B20 \u7684\u53c2\u6570\u3001\u5de5\u4f5c\u539f\u7406\u4ee5\u53ca\u4f7f\u7528\u6848\u4f8b\uff0c\u5e2e\u52a9\u60a8\u6df1\u5165\u4e86\u89e3\u548c\u5e94\u7528 DS18B20\u3002<\/p>\n<h2>1. \u6e90\u7801\u4e0b\u8f7d\u53ca\u524d\u7f6e\u9605\u8bfb<\/h2>\n<p>\u672c\u6587\u9996\u53d1 \uff1a<a href=\"https:\/\/link.segmentfault.com\/?enc=rN4Zd3CJu%2F%2BH9w96WFW6iA%3D%3D.fVrwMqyskg8Cgtm2nEz8k%2B31I8eDEDefY9YwxkpZa10%3D\" rel=\"nofollow noopener noreferrer\" target=\"_blank\">https:\/\/www.lxlinux.net\/e\/<\/a> \uff0c\u6b22\u8fce\u5173\u6ce8\uff01<\/p>\n<p>\u672c\u6587\u6240\u6d89\u53ca\u7684\u6e90\u7801\u53ca\u5b89\u88c5\u5305\u5982\u4e0b\uff08\u7531\u4e8e\u5e73\u53f0\u9650\u5236\uff0c\u8bf7\u70b9\u51fb\u4ee5\u4e0b\u94fe\u63a5\u9605\u8bfb\u539f\u6587\u4e0b\u8f7d\uff09\uff1a<\/p>\n<p><a href=\"https:\/\/link.segmentfault.com\/?enc=F9BJ6Dk6E%2B2CF6q1y%2FFCrQ%3D%3D.mCAY0MWlbLQgWtXbT4V7GyMW8CNvkpm30QuURTX9u9aBmuTe93xOxp7Vktz400BEqz30%2F1w8Vejh6hX5%2FLBP8g%3D%3D\" rel=\"nofollow noopener noreferrer\" target=\"_blank\">https:\/\/www.lxlinux.net\/e\/stm32\/ds18b20-tutorial.html<\/a><\/p>\n<p>\u5982\u679c\u4f60\u662f\u5d4c\u5165\u5f0f\u5f00\u53d1\u5c0f\u767d\uff0c\u90a3\u4e48\u5efa\u8bae\u4f60\u5148\u8bfb\u8bfb\u4e0b\u9762\u51e0\u7bc7\u6587\u7ae0\u3002<\/p>\n<ul>\n<li>\u4e86\u89e3\u4e0d\u540c\u7684\u4e0b\u8f7d\u7a0b\u5e8f\u65b9\u6cd5\uff0c\u4e3a\u4f60\u7684\u5d4c\u5165\u5f0f\u5f00\u53d1\u63d0\u4f9b\u66f4\u591a\u9009\u62e9\uff1a<a href=\"https:\/\/link.segmentfault.com\/?enc=HceLUGya9u%2BxAlPBWFs2fA%3D%3D.g6gXnVhLj0yXn0qOENxfLl9h4U5rtQEW%2BDGbiBoD6fljR%2Fe23qqETV13pW8gv%2B70Ic%2FD7NFpTi0V77CV1OEMsWIz9cMJ2NxAm60Hroc9Yv4%3D\" rel=\"nofollow noopener noreferrer\" target=\"_blank\">STM32\u4e0b\u8f7d\u7a0b\u5e8f\u7684\u4e94\u79cd\u65b9\u6cd5<\/a><\/li>\n<li>\u5d4c\u5165\u5f0f\u5f00\u53d1\u8005\u7684\u5f97\u529b\u52a9\u624b\uff0c\u5f3a\u5927\u7684MDK\u4eff\u771f\uff1a<a href=\"https:\/\/link.segmentfault.com\/?enc=gIQOtLAn9eldRcHTOMSh6A%3D%3D.m%2FoUeIgi676uBXrwiMAk01mSBoRAJMYkjQ3dgmh0cajLEc%2BCPrF5bXWp4QBuI1rzXdGvoe%2BJCF8TVCBqELldgw%3D%3D\" rel=\"nofollow noopener noreferrer\" target=\"_blank\">\u624b\u628a\u624b\u6559\u4f60\u4f7f\u7528MDK\u4eff\u771f\u8c03\u8bd5<\/a><\/li>\n<li>\u5982\u679c\u4f60\u60f3\u642d\u4e00\u4e2a\u5c5e\u4e8e\u81ea\u5df1\u7684\u5de5\u7a0b\u6a21\u677f\uff1a<a href=\"https:\/\/link.segmentfault.com\/?enc=REugx9ogmExiX0xGyek3EA%3D%3D.EXmpjW1%2FLNbWv8YMmQ8V5VqFYBLf0fXh5r1O7cJ%2BGfSAqkmePsXqUXUmUj2U2lC1fhybnmphldW7eAyHCcaplXc8oU9wrNK16Pco0rcEMZA%3D\" rel=\"nofollow noopener noreferrer\" target=\"_blank\">\u624b\u628a\u624b\u5e26\u4f60\u521b\u5efaHAL\u7248\u672cMDK\u5de5\u7a0b\u6a21\u677f<\/a><\/li>\n<\/ul>\n<p>\u5f80\u671f\u6559\u7a0b\uff0c\u6709\u5174\u8da3\u7684\u5c0f\u4f19\u4f34\u53ef\u4ee5\u770b\u770b\u3002<\/p>\n<ul>\n<li>\u89e3\u6790\u7ea2\u5916\u7f16\u89e3\u7801\u6a21\u5757\u7684\u539f\u7406\u3001\u529f\u80fd\u548c\u5e94\u7528\uff1a<a href=\"https:\/\/link.segmentfault.com\/?enc=nuCrDNf09KiVNo5fT0hkMg%3D%3D.IX%2FFuFkVAZBDS%2B%2BWd8YCgWKF6H1jrJCm4KVmYP4BavAq0Z%2Bh4ZZRSIvjE6CrpOjLfg2tTRPY8MXDJbU%2FK96kxQ%3D%3D\" rel=\"nofollow noopener noreferrer\" target=\"_blank\">\u7ea2\u5916\u6a21\u5757\u8be6\u89e3<\/a><\/li>\n<li>\u84dd\u7259\u6a21\u5757\u77e5\u8bc6\u5e94\u7528\uff1a<a href=\"https:\/\/link.segmentfault.com\/?enc=8fbcBvT7peXe3TR42Yi3cg%3D%3D.ZGKM0yfKqtwllXM5AwSbFko%2Fm%2BWk2mwe06JBsdqdObpTDxFpw9oYMTSW7AmoCUUSbmzZuDy%2Fyo1SNZtC%2FO86Rg%3D%3D\" rel=\"nofollow noopener noreferrer\" target=\"_blank\">\u5c0f\u9879\u76ee\uff1a\u84dd\u7259\u6a21\u5757\u70b9\u4eaeRGB\u4e09\u8272\u706f<\/a><\/li>\n<li>\u7b80\u5355\u597d\u7528\uff0c\u4e3a\u4f60\u7684\u667a\u80fd\u8bed\u97f3\u9879\u76ee\u63d0\u4f9b\u6838\u5fc3\u652f\u6301\uff1a<a href=\"https:\/\/link.segmentfault.com\/?enc=%2ByuFrEQLgWClDpHm3ERUuQ%3D%3D.EXAsqr7Rw4z%2FLlpwau5e%2BmpFgH5qB8TXaSrKd4HSIryFeRUwGM2Xsmt7Eyw1kn9uHQ9%2Foddm28YoFoi%2FPWfwIw%3D%3D\" rel=\"nofollow noopener noreferrer\" target=\"_blank\">SU-03T\u8bed\u97f3\u63a7\u5236\u6a21\u5757\u8be6\u89e3<\/a><\/li>\n<\/ul>\n<table>\n<thead>\n<tr>\n<th align=\"left\">\u4f5c\u8005\u7b80\u4ecb<\/th>\n<\/tr>\n<\/thead>\n<tbody>\n<tr>\n<td align=\"left\">\u5927\u5bb6\u597d\uff0c\u6211\u662f\u826f\u8bb8\uff0c\u535a\u5ba2\u91cc\u6240\u6709\u7684\u6587\u7ae0\u7686\u4e3a\u6211\u7684\u539f\u521b\u3002<br \/>\u4e0b\u9762\u662f\u6211\u7684\u4e00\u4e9b\u4e2a\u4eba\u4ecb\u7ecd\uff0c\u6b22\u8fce\u4ea4\u4e2a\u670b\u53cb\uff1a<br \/>\u00b7 211\u5de5\u79d1\u7855\u58eb\uff0c\u56fd\u5bb6\u5956\u5b66\u91d1\u83b7\u5f97\u8005\uff1b<br \/>\u00b7 \u6df1\u8015\u5d4c\u5165\u5f0f11\u5e74\uff0c\u524d\u4e16\u754c500\u5f3a\u5916\u4f01\u9ad8\u7ea7\u5d4c\u5165\u5f0f\u5de5\u7a0b\u5e08\uff1b<br \/>\u00b7 \u4e66\u7c4d\u300a\u901f\u5b66Linux\u4f5c\u8005\u300b\uff0c\u673a\u68b0\u5de5\u4e1a\u51fa\u7248\u793e\u4e13\u5bb6\u59d4\u5458\u4f1a\u6210\u5458\uff1b<br \/>\u00b7 \u5168\u7f5160W\u7c89\u4e1d\uff0c\u535a\u5ba2\u5206\u4eab\u5927\u91cf\u539f\u521b\u6210\u4f53\u7cfb\u6587\u7ae0\uff0c\u5168\u7f51\u9605\u8bfb\u91cf\u7d2f\u8ba1\u8d854000\u4e07\uff1b<br \/>\u00b7 \u9760\u81ea\u5a92\u4f53\u8fde\u7eed\u5e74\u5165\u767e\u4e07\uff0c\u9760\u81ea\u5df1\u4e70\u623f\u4e70\u8f66\u3002<\/td>\n<\/tr>\n<\/tbody>\n<\/table>\n<p>\u6211\u672c\u79d1\u53ca\u7855\u58eb\u90fd\u662f\u5b66\u673a\u68b0\uff0c\u901a\u8fc7\u81ea\u5b66\u6210\u529f\u8fdb\u5165\u4e16\u754c500\u5f3a\u5916\u4f01\u3002\u6211\u5df2\u7ecf\u5c06\u81ea\u5df1\u7684\u5b66\u4e60\u7ecf\u9a8c\u5199\u6210\u4e86\u4e00\u672c\u7535\u5b50\u4e66\uff0c\u8d85\u5343\u4eba\u901a\u8fc7\u6b64\u4e66\u5b66\u4e60\u5e76\u8f6c\u884c\u6210\u529f\u3002\u73b0\u5728\u5c06\u8fd9\u672c\u7535\u5b50\u4e66\u514d\u8d39\u5206\u4eab\u7ed9\u5927\u5bb6\uff0c\u5e0c\u671b\u5bf9\u4f60\u4eec\u6709\u5e2e\u52a9\uff1a<\/p>\n<p>\u7535\u5b50\u4e66\u94fe\u63a5\uff1a<a href=\"https:\/\/link.segmentfault.com\/?enc=OEyRIXpDNUQ7ahCpbmilEg%3D%3D.9eom1V8tyB%2FTSI3XeUEVoaUupZ9xBEjwGhn6EOfQraZolLj%2BP9XosUrs61ljgF57\" rel=\"nofollow noopener noreferrer\" target=\"_blank\">https:\/\/www.lxlinux.net\/1024.html<\/a><\/p>\n<p><img loading=\"lazy\" decoding=\"async\" width=\"392\" height=\"836\" referrerpolicy=\"no-referrer\" src=\"https:\/\/segmentfault.com\/img\/bVdfebd\" alt=\"\" title=\"\"><\/p>\n<h2>2. DS18B20\u4ecb\u7ecd<\/h2>\n<h3>2.1 DS18B20\u578b\u53f7\u4ecb\u7ecd<\/h3>\n<p>DS18B20 \u662f\u6d4b\u6e29\u4f20\u611f\u5668\u7684\u578b\u53f7\uff0c\u6211\u4eec\u7ecf\u5e38\u628a\u4f7f\u7528\u8fd9\u4e2a\u578b\u53f7\u7684\u6d4b\u6e29\u6a21\u5757\u4e5f\u7edf\u79f0\u4f5c DS18B20\u3002DS18B20 \u5177\u6709\u7cbe\u5ea6\u9ad8\u3001\u4f53\u79ef\u5c0f\u3001\u63a5\u7ebf\u7b80\u5355\u3001\u6297\u5e72\u6270\u80fd\u529b\u5f3a\u7684\u7279\u70b9\u3002\u9002\u7528\u4e8e\u6e29\u5ea6\u63a7\u5236\u3001\u5de5\u4e1a\u7cfb\u7edf\u3001\u6e29\u5ea6\u8ba1\u4ee5\u53ca\u4efb\u4f55\u70ed\u611f\u6d4b\u7cfb\u7edf\u3002<\/p>\n<p><img decoding=\"async\" width=\"251\" height=\"257\" referrerpolicy=\"no-referrer\" src=\"https:\/\/segmentfault.com\/img\/bVdfJoJ\" alt=\"\" title=\"\" loading=\"lazy\"><\/p>\n<p>\u4e00\u4e9b\u5173\u4e8e DS18B20 \u7684\u51b7\u77e5\u8bc6\uff0c\u6709\u5174\u8da3\u7684\u5c0f\u4f19\u4f34\u53ef\u4ee5\u5728\u6587\u7ae0\u5934\u7684\u624b\u518c\u4e2d\u67e5\u770b\u66f4\u591a\u7ec6\u8282\uff1a<\/p>\n<ol>\n<li>\u62a5\u8b66\u529f\u80fd\uff1aDS18B20 \u6570\u5b57\u6e29\u5ea6\u8ba1\u63d0\u4f9b 9-12 \u4f4d\u6444\u6c0f\u6e29\u5ea6\u6d4b\u91cf\u800c\u4e14\u6709\u4e00\u4e2a\u7531\u9ad8\u4f4e\u7535\u5e73\u89e6\u53d1\u7684\u53ef\u7f16\u7a0b\u7684\u4e0d\u56e0\u7535\u6e90\u6d88\u5931\u800c\u6539\u53d8\u7684\u62a5\u8b66\u529f\u80fd\u3002\u8fd9\u91cc\u7684\u62a5\u8b66\u662f\u6307 DS18B20 \u5185\u90e8\u4f1a\u7f6e\u4f4d\u4e00\u4e2a\u62a5\u8b66\u6807\u8bc6\uff0c\u800c\u4e0d\u662f\u95ea\u706f\u6216\u8005\u8702\u9e23\u5668\u54e6\u3002<\/li>\n<li>\u72ec\u7279\u5e8f\u5217\u53f7\uff1a\u6bcf\u4e2a DS18B20 \u90fd\u6709\u4e00\u4e2a\u72ec\u7279\u7684 64 \u4f4d\u5e8f\u5217\u53f7\uff0c\u4ece\u800c\u5141\u8bb8\u591a\u53ea DS18B20 \u540c\u65f6\u8fde\u5728\u4e00\u6839\u5355\u7ebf\u603b\u7ebf\u4e0a\uff1b\u56e0\u6b64\uff0c\u5f88\u7b80\u5355\u5c31\u53ef\u4ee5\u7528\u4e00\u4e2a\u5fae\u63a7\u5236\u5668\u53bb\u63a7\u5236\u5f88\u591a\u8986\u76d6\u5728\u4e00\u5927\u7247\u533a\u57df\u7684 DS18B20\u3002\u8fd9\u4e00\u7279\u6027\u5728 HVAC \u73af\u5883\u63a7\u5236\u3001\u63a2\u6d4b\u5efa\u7b51\u7269\u3001\u4eea\u5668\u6216\u673a\u5668\u7684\u6e29\u5ea6\u4ee5\u53ca\u8fc7\u7a0b\u76d1\u6d4b\u548c\u63a7\u5236\u7b49\u65b9\u9762\u975e\u5e38\u6709\u7528\u3002<\/li>\n<li>\u65e0\u9700\u5916\u90e8\u4f9b\u7535\uff1aDS18B20\u7684\u53e6\u4e00\u4e2a\u529f\u80fd\u662f\u53ef\u4ee5\u5728\u6ca1\u6709\u5916\u90e8\u7535\u6e90\u4f9b\u7535\u7684\u60c5\u51b5\u4e0b\u5de5\u4f5c\u3002\u5f53\u603b\u7ebf\u5904\u4e8e\u9ad8\u7535\u5e73\u72b6\u6001\uff0cDQ\u4e0e\u4e0a\u62c9\u7535\u963b\u8fde\u63a5\u901a\u8fc7\u5355\u603b\u7ebf\u5bf9\u5668\u4ef6\u4f9b\u7535\u3002\u540c\u65f6\u5904\u4e8e\u9ad8\u7535\u5e73\u72b6\u6001\u7684\u603b\u7ebf\u4fe1\u53f7\u5bf9\u5185\u90e8\u7535\u5bb9\uff08Cpp\uff09\u5145\u7535\uff0c\u5728\u603b\u7ebf\u5904\u4e8e\u4f4e\u7535\u5e73\u72b6\u6001\u65f6\uff0c\u8be5\u7535\u5bb9\u63d0\u4f9b\u80fd\u91cf\u7ed9\u5668\u4ef6\u3002\u8fd9\u79cd\u63d0\u4f9b\u80fd\u91cf\u7684\u5f62\u5f0f\u88ab\u79f0\u4e3a\u201c\u5bc4\u751f\u7535\u6e90\u201d\u3002<\/li>\n<\/ol>\n<h3>2.2 DS18B20\u53c2\u6570\u53ca\u5f15\u811a\u4ecb\u7ecd<\/h3>\n<p>DS18B20\u53c2\u6570\uff1a<\/p>\n<ul>\n<li>\u5de5\u4f5c\u7535\u538b\uff1aDC 3V ~ 5.5V<\/li>\n<li>\u6d4b\u6e29\u8303\u56f4\uff1a-55\u2103 ~ +125\u2103\uff08-67\u00b0F ~ +257\u00b0F\uff09<\/li>\n<li>\u7cbe\u5ea6\uff1a\u00b12\u2103\uff08-55\u00b0C ~ +125\u00b0C\uff09\uff0c\u00b10.5\u2103\uff08-10\u00b0C ~ +85\u00b0C\uff09<\/li>\n<li>PCB \u677f\u5c3a\u5bf8\uff1a21mm \u00d7 10mm<\/li>\n<\/ul>\n<p><img decoding=\"async\" width=\"460\" height=\"329\" referrerpolicy=\"no-referrer\" src=\"https:\/\/segmentfault.com\/img\/bVdfJoK\" alt=\"\" title=\"\" loading=\"lazy\"><\/p>\n<p>\u53c2\u8003\u63a5\u7ebf\u5982\u4e0b\uff1a<\/p>\n<table>\n<thead>\n<tr>\n<th align=\"center\">DS18B20<\/th>\n<th align=\"center\">STM32<\/th>\n<\/tr>\n<\/thead>\n<tbody>\n<tr>\n<td align=\"center\">VCC<\/td>\n<td align=\"center\">3.3\/5V<\/td>\n<\/tr>\n<tr>\n<td align=\"center\">DQ<\/td>\n<td align=\"center\">\u4efb\u610f\u4e00\u4e2aGPIO\u53e3<\/td>\n<\/tr>\n<tr>\n<td align=\"center\">GND<\/td>\n<td align=\"center\">GND<\/td>\n<\/tr>\n<\/tbody>\n<\/table>\n<h2>3. DS18B20\u5de5\u4f5c\u539f\u7406<\/h2>\n<h3>3.1 \u9ad8\u901f\u6682\u5b58\u5668<\/h3>\n<p><img decoding=\"async\" width=\"706\" height=\"309\" referrerpolicy=\"no-referrer\" src=\"https:\/\/segmentfault.com\/img\/bVdfJoL\" alt=\"\" title=\"\" loading=\"lazy\"><\/p>\n<ul>\n<li>\u5b57\u8282 0~1 \u662f\u6e29\u5ea6\u5b58\u50a8\u5668\uff0c\u53ea\u8bfb\uff0c\u7528\u6765\u5b58\u50a8\u8f6c\u6362\u597d\u7684\u6e29\u5ea6\u3002\u7b2c0\u4e2a\u5b57\u8282\u5b58\uff08LSB\uff09\u50a8\u6e29\u5ea6\u4f4e8\u4f4d\uff0c\u7b2c1\u4e2a\u5b57\u8282\uff08MSB\uff09\u5b58\u50a8\u6e29\u5ea6\u9ad88\u4f4d\u3002<\/li>\n<li>\u5b57\u8282 2~3 \u662f\u7528\u6237\u7528\u6765\u8bbe\u7f6e\u6700\u9ad8\u62a5\u8b66\u548c\u6700\u4f4e\u62a5\u8b66\u503c\uff08TH \u548c TL\uff09\u3002<\/li>\n<li>\u5b57\u8282 4 \u662f\u914d\u7f6e\u5bc4\u5b58\u5668\uff0c\u7528\u6765\u914d\u7f6e\u8f6c\u6362\u7cbe\u5ea6\uff0c\u53ef\u4ee5\u8bbe\u7f6e\u4e3a 9~12 \u4f4d\uff08\u9ed8\u8ba4 12 \u4f4d\uff0c\u7cbe\u5ea6\u662f0.0625\u2103\uff09\u3002<\/li>\n<li>\u5b57\u8282 5~7 \u4fdd\u7559\u4f4d\uff0c\u7981\u6b62\u5199\u5165\u3002<\/li>\n<li>\u5b57\u8282 8 CRC\u6821\u9a8c\u4f4d\uff0c\u53ea\u8bfb\uff0c\u662f64\u4f4dROM\u4e2d\u7684\u524d56\u4f4d\u7f16\u7801\u7684\u6821\u9a8c\u7801\uff0c\u7531CRC\u53d1\u751f\u5668\u4ea7\u751f\u3002<\/li>\n<\/ul>\n<p>\u6211\u4eec\u91cd\u70b9\u8bb2\u4e0b\u5b57\u8282 0~1\uff0c\u6e29\u5ea6\u5b58\u50a8\u5668\u3002\u5176\u4ed6\u7684\uff0c\u611f\u5174\u8da3\u7684\u540c\u5b66\u53ef\u4ee5\u67e5\u770b\u6587\u7ae0\u5934\u7684\u624b\u518c\u3002<\/p>\n<p>LSB \u548c MSB \u7ec4\u6210\u5341\u516d\u4f4d\u7684\u6e29\u5ea6\u6570\u636e\uff0c\u5177\u4f53\u793a\u4f8b\u5982\u4e0b\uff1a<\/p>\n<p><img decoding=\"async\" width=\"645\" height=\"287\" referrerpolicy=\"no-referrer\" src=\"https:\/\/segmentfault.com\/img\/bVdfJoM\" alt=\"\" title=\"\" loading=\"lazy\"><\/p>\n<p>\u6e29\u5ea6\u4e3a\u8d1f\u65f6\uff0c\u5bc4\u5b58\u5668\u5b58\u50a8\u503c\u6309\u4f4d\u53d6\u53cd\u540e +1\uff0c\u00d7 \u7cbe\u5ea6\uff0c\u5373\u4e3a\u6e29\u5ea6\u503c\u3002<\/p>\n<p>\u4f8b\u5982\uff1a1111 1111 0101 1110 \u53d6\u53cd\u540e\u4e3a 0000 0000 1010 0001\uff0c\u8f6c\u6210\u5341\u8fdb\u5236\u662f161\uff0c161+1=162\uff0c162\u00d70.0625=10.125\uff0c\u52a0\u4e0a\u8d1f\u53f7\u5c31\u662f -10.125\u4e86\u3002<\/p>\n<h3>3.2 \u6307\u4ee4<\/h3>\n<h4>3.2.1 ROM\u6307\u4ee4<\/h4>\n<p>\u603b\u7ebf\u63a7\u5236\u5668\u5728\u53d1\u8d77\u4e00\u6761 DS18B20 \u529f\u80fd\u6307\u4ee4\u4e4b\u524d\u5fc5\u987b\u5148\u53d1\u51fa\u4e00\u6761 ROM \u6307\u4ee4\u3002<\/p>\n<table>\n<thead>\n<tr>\n<th align=\"center\">ROM\u6307\u4ee4\uff08\u5341\u516d\u8fdb\u5236\uff09<\/th>\n<th align=\"center\">\u610f\u4e49<\/th>\n<th align=\"center\">\u8bf4\u660e<\/th>\n<\/tr>\n<\/thead>\n<tbody>\n<tr>\n<td align=\"center\">F0<\/td>\n<td align=\"center\">\u641c\u7d22 ROM<\/td>\n<td align=\"center\">\u5f53\u7cfb\u7edf\u4e0a\u7535\u521d\u59cb\u5316\u7684\u65f6\u5019\uff0c\u603b\u7ebf\u63a7\u5236\u5668\u5fc5\u987b\u901a\u8fc7\u8bc6\u522b\u603b\u7ebf\u4e0a\u6240\u6709 ROM \u7247\u5e8f\u5217\u7801\u53bb\u5f97\u5230\u4ece\u673a\u7684\u6570\u76ee\u548c\u578b\u53f7\u3002\u5982\u679c\u603b\u7ebf\u4e0a\u53ea\u6709\u4e00\u53ea\u4ece\u673a\uff0c\u90a3\u4e48\u53ef\u4ee5\u7528\u8bfb\u53d6ROM \u6307\u4ee4\u4ee3\u66ff\u3002<\/td>\n<\/tr>\n<tr>\n<td align=\"center\">33<\/td>\n<td align=\"center\">\u8bfb\u53d6 ROM<\/td>\n<td align=\"center\">\u53ea\u6709\u5728\u603b\u7ebf\u4e0a\u5b58\u5728\u5355\u53ea DS18B20 \u7684\u65f6\u5019\u624d\u80fd\u4f7f\u7528\u8fd9\u6761\u547d\u4ee4\u3002\u8be5\u547d\u4ee4\u5141\u8bb8\u603b\u7ebf\u63a7\u5236\u5668\u5728\u4e0d\u4f7f\u7528\u641c\u7d22 ROM \u6307\u4ee4\u7684\u60c5\u51b5\u4e0b\u8bfb\u53d6\u4ece\u673a\u7684 64 \u4f4d\u7247\u5e8f\u5217\u7801\u3002\u5982\u679c\u603b\u7ebf\u4e0a\u6709\u4e0d\u6b62\u4e00\u53ea\u4ece\u673a\uff0c\u5f53\u6240\u6709\u4ece\u673a\u8bd5\u56fe\u540c\u65f6\u4f20\u9001\u4fe1\u53f7\u65f6\u5c31\u4f1a\u53d1\u751f\u6570\u636e\u51b2\u7a81\u3002<\/td>\n<\/tr>\n<tr>\n<td align=\"center\">55<\/td>\n<td align=\"center\">\u5339\u914d ROM<\/td>\n<td align=\"center\">\u5339\u914d ROM \u6307\u4ee4\uff0c\u540e\u8ddf 64 \u4f4d ROM \u7f16\u7801\u5e8f\u5217\uff0c\u8ba9\u603b\u7ebf\u63a7\u5236\u5668\u5728\u591a\u70b9\u603b\u7ebf\u4e0a\u5b9a\u4f4d\u4e00\u53ea\u7279\u5b9a\u7684 DS18B20\u3002\u53ea\u6709\u548c 64 \u4f4d ROM \u7247\u5e8f\u5217\u7801\u5b8c\u5168\u5339\u914d\u7684 DS18B20 \u624d\u80fd\u54cd\u5e94\u968f\u540e\u7684\u5b58\u50a8\u5668\u64cd\u4f5c\u6307\u4ee4\uff1b\u4e0d\u5339\u914d\u5c06\u7b49\u5f85\u590d\u4f4d\u8109\u51b2\u3002<\/td>\n<\/tr>\n<tr>\n<td align=\"center\">CC<\/td>\n<td align=\"center\">\u8df3\u8fc7 ROM<\/td>\n<td align=\"center\">\u8fd9\u6761\u6307\u4ee4\u5141\u8bb8\u603b\u7ebf\u63a7\u5236\u5668\u4e0d\u7528\u63d0\u4f9b 64 \u4f4d ROM \u7f16\u7801\u5c31\u4f7f\u7528\u529f\u80fd\u6307\u4ee4\u3002<\/td>\n<\/tr>\n<tr>\n<td align=\"center\">EC<\/td>\n<td align=\"center\">\u62a5\u8b66\u641c\u7d22<\/td>\n<td align=\"center\">\u8fd9\u6761\u6307\u4ee4\u7684\u6d41\u7a0b\u548c\u641c\u7d22 ROM \u6307\u4ee4\u76f8\u540c\uff0c\u4f46\u53ea\u6709\u6ee1\u8db3\u62a5\u8b66\u6761\u4ef6\u7684\u4ece\u673a\u624d\u5bf9\u8be5\u547d\u4ee4\u4f5c\u51fa\u54cd\u5e94\u3002\u53ea\u6709\u5728\u6700\u8fd1\u4e00\u6b21\u6d4b\u6e29\u540e\u9047\u5230\u7b26\u5408\u62a5\u8b66\u6761\u4ef6\u7684\u60c5\u51b5\uff0cDS18B20 \u624d\u4f1a\u54cd\u5e94\u8fd9\u6761\u547d\u4ee4\u3002<\/td>\n<\/tr>\n<\/tbody>\n<\/table>\n<h4>3.2.2 \u529f\u80fd\u6307\u4ee4<\/h4>\n<table>\n<thead>\n<tr>\n<th align=\"center\">\u529f\u80fd\u6307\u4ee4\uff08\u5341\u516d\u8fdb\u5236\uff09<\/th>\n<th align=\"center\">\u610f\u4e49<\/th>\n<th align=\"center\">\u8bf4\u660e<\/th>\n<\/tr>\n<\/thead>\n<tbody>\n<tr>\n<td align=\"center\">44<\/td>\n<td align=\"center\">\u6e29\u5ea6\u8f6c\u6362<\/td>\n<td align=\"center\">\u4ea7\u751f\u7684\u6e29\u5ea6\u8f6c\u6362\u7ed3\u679c\u6570\u636e\u4ee5 2 \u4e2a\u5b57\u8282\u7684\u5f62\u5f0f\u88ab\u5b58\u50a8\u5728\u9ad8\u901f\u6682\u5b58\u5668\u4e2d\uff0c\u800c\u540e DS18B20 \u4fdd\u6301\u7b49\u5f85\u72b6\u6001\u3002<\/td>\n<\/tr>\n<tr>\n<td align=\"center\">4E<\/td>\n<td align=\"center\">\u5199\u6682\u5b58\u5668<\/td>\n<td align=\"center\">\u8fd9\u6761\u547d\u4ee4\u5411 DS18B20 \u7684\u6682\u5b58\u5668\u5199\u5165\u6570\u636e\uff0c\u5f00\u59cb\u4f4d\u7f6e\u5728 TH \u5bc4\u5b58\u5668\uff0c\u63a5\u4e0b\u6765\u5199\u5165 TL \u5bc4\u5b58\u5668\uff0c\u6700\u540e\u5199\u5165\u914d\u7f6e\u5bc4\u5b58\u5668\u3002<\/td>\n<\/tr>\n<tr>\n<td align=\"center\">BE<\/td>\n<td align=\"center\">\u8bfb\u6682\u5b58\u5668<\/td>\n<td align=\"center\">\u8fd9\u6761\u547d\u4ee4\u8bfb\u53d6\u6682\u5b58\u5668\u7684\u5185\u5bb9\u3002\u8bfb\u53d6\u5c06\u4ece\u5b57\u8282 0 \u5f00\u59cb\uff0c\u4e00\u76f4\u8fdb\u884c\u4e0b\u53bb\uff0c\u76f4\u5230\u7b2c 9 \u5b57\u8282\uff08\u5b57\u8282 8\uff0cCRC\uff09\u8bfb\u5b8c\u3002<\/td>\n<\/tr>\n<tr>\n<td align=\"center\">48<\/td>\n<td align=\"center\">\u62f7\u8d1d\u6682\u5b58\u5668<\/td>\n<td align=\"center\">\u8fd9\u6761\u547d\u4ee4\u628a TH\uff0cTL \u548c\u914d\u7f6e\u5bc4\u5b58\u5668\uff08\u7b2c 2\u30013\u30014 \u5b57\u8282\uff09\u7684\u5185\u5bb9\u62f7\u8d1d\u5230 EEPROM \u4e2d\u3002<\/td>\n<\/tr>\n<tr>\n<td align=\"center\">B8<\/td>\n<td align=\"center\">\u53ec\u56de EEPROM<\/td>\n<td align=\"center\">\u8fd9\u6761\u547d\u4ee4\u628a\u62a5\u8b66\u89e6\u53d1\u5668\u7684\u503c\uff08TH \u548c TL\uff09\u4ee5\u53ca\u914d\u7f6e\u6570\u636e\u4ece EEPROM \u62f7\u56de\u6682\u5b58\u5668\u3002<\/td>\n<\/tr>\n<tr>\n<td align=\"center\">B4<\/td>\n<td align=\"center\">\u8bfb\u7535\u6e90\u6a21\u5f0f<\/td>\n<td align=\"center\">\u603b\u7ebf\u63a7\u5236\u5668\u5728\u8fd9\u6761\u547d\u4ee4\u53d1\u7ed9 DS18B20 \u540e\u53d1\u51fa\u8bfb\u65f6\u5e8f\uff0c\u82e5\u662f\u5bc4\u751f\u7535\u6e90\u6a21\u5f0f\uff0cDS18B20\u5c06\u62c9\u4f4e\u603b\u7ebf\uff1b\u82e5\u662f\u5916\u90e8\u7535\u6e90\u6a21\u5f0f\uff0cDS18B20 \u5c06\u62c9\u9ad8\u603b\u7ebf\u3002<\/td>\n<\/tr>\n<\/tbody>\n<\/table>\n<h3>3.3 DS18B20\u5de5\u4f5c\u65f6\u5e8f<\/h3>\n<p>DS18B20 \u9700\u8981\u4e25\u683c\u7684\u5355\u603b\u7ebf\u534f\u8bae\u4ee5\u786e\u4fdd\u6570\u636e\u7684\u5b8c\u6574\u6027\u3002\u534f\u8bae\u5305\u62ec\u96c6\u4e2d\u5355\u603b\u7ebf\u4fe1\u53f7\u7c7b\u578b\uff1a\u590d\u4f4d\u8109\u51b2\u3001\u5b58\u5728\u8109\u51b2\u3001\u5199 0\u3001\u5199 1\u3001\u8bfb 0 \u548c\u8bfb 1\u3002\u6240\u6709\u8fd9\u4e9b\u4fe1\u53f7\uff0c\u9664\u5b58\u5728\u8109\u51b2\u5916\uff0c\u90fd\u662f\u7531\u603b\u7ebf\u63a7\u5236\u5668\uff08\u5355\u7247\u673a\uff09\u53d1\u51fa\u7684\u3002<\/p>\n<h4>3.3.1 \u521d\u59cb\u5316<\/h4>\n<p>\u603b\u7ebf\u63a7\u5236\u5668\u62c9\u4f4e\u603b\u7ebf\uff08DQ\uff09\u5e76\u4fdd\u6301 480us \u4ee5\u53d1\u51fa\u4e00\u4e2a\u590d\u4f4d\u8109\u51b2\uff0c\u7136\u540e\u91ca\u653e\u603b\u7ebf\uff0c\u8fdb\u5165\u63a5\u6536\u72b6\u6001\u3002\u5355\u603b\u7ebf\u7531 5K \u4e0a\u62c9\u7535\u963b\u62c9\u5230\u9ad8\u7535\u5e73\u3002\u5f53 DS18B20 \u63a2\u6d4b\u5230 I\/O \u5f15\u811a\u4e0a\u7684\u4e0a\u5347\u6cbf\u540e\uff0c\u7b49\u5f85 15-60us \u540e\u53d1\u51fa\u4e00\u4e2a\u7531 60-240us \u4f4e\u7535\u5e73\u4fe1\u53f7\u6784\u6210\u7684\u5b58\u5728\u8109\u51b2\u3002<\/p>\n<p><img decoding=\"async\" width=\"723\" height=\"283\" referrerpolicy=\"no-referrer\" src=\"https:\/\/segmentfault.com\/img\/bVdfJoN\" alt=\"\" title=\"\" loading=\"lazy\"><\/p>\n<h4>3.3.2 \u5199\u65f6\u5e8f<\/h4>\n<p>\u6240\u6709\u5199\u65f6\u5e8f\u5fc5\u987b\u6700\u5c11\u6301\u7eed 60us\uff0c\u5305\u62ec\u4e24\u4e2a\u5199\u5468\u671f\u4e4b\u95f4\u81f3\u5c11 1us \u7684\u6062\u590d\u65f6\u95f4\u3002\u5f53\u603b\u7ebf\u63a7\u5236\u5668\u628a\u6570\u636e\u7ebf\u4ece\u903b\u8f91\u9ad8\u7535\u5e73\u62c9\u5230\u4f4e\u7535\u5e73\u7684\u65f6\u5019\uff0c\u5199\u65f6\u5e8f\u5f00\u59cb\u3002<\/p>\n<p>\u603b\u7ebf\u63a7\u5236\u5668\u8981\u751f\u4ea7\u4e00\u4e2a\u5199\u65f6\u5e8f\uff0c\u5fc5\u987b\u628a\u6570\u636e\u7ebf\u62c9\u5230\u4f4e\u7535\u5e73\u7136\u540e\u91ca\u653e\uff0c\u5728\u5199\u65f6\u5e8f\u5f00\u59cb\u540e\u7684 15us \u91ca\u653e\u603b\u7ebf\u3002\u5f53\u603b\u7ebf\u88ab\u91ca\u653e\u7684\u65f6\u5019\uff0c5K \u7684\u4e0a\u62c9\u7535\u963b\u5c06\u62c9\u9ad8\u603b\u7ebf\u3002\u603b\u63a7\u5236\u5668\u8981\u751f\u6210\u4e00\u4e2a\u5199 0 \u65f6\u5e8f\uff0c\u5fc5\u987b\u628a\u6570\u636e\u7ebf\u62c9\u5230\u4f4e\u7535\u5e73\u5e76\u6301\u7eed\u4fdd\u6301\uff08\u81f3\u5c11 60us\uff09\u3002<\/p>\n<p><img decoding=\"async\" width=\"723\" height=\"266\" referrerpolicy=\"no-referrer\" src=\"https:\/\/segmentfault.com\/img\/bVdfJoO\" alt=\"\" title=\"\" loading=\"lazy\"><\/p>\n<p>\u603b\u7ebf\u63a7\u5236\u5668\u521d\u59cb\u5316\u5199\u65f6\u5e8f\u540e\uff0cDS18B20 \u5728\u4e00\u4e2a 15us \u5230 60us \u7684\u7a97\u53e3\u5185\u5bf9 I\/O \u7ebf\u91c7\u6837\u3002\u5982\u679c\u7ebf\u4e0a\u662f\u9ad8\u7535\u5e73\uff0c\u5c31\u662f\u5199 1\u3002\u5982\u679c\u7ebf\u4e0a\u662f\u4f4e\u7535\u5e73\uff0c\u5c31\u662f\u5199 0\u3002<\/p>\n<h4>3.3.3 \u8bfb\u65f6\u5e8f<\/h4>\n<p>\u6240\u6709\u8bfb\u65f6\u5e8f\u5fc5\u987b\u6700\u5c11 60us\uff0c\u5305\u62ec\u4e24\u4e2a\u8bfb\u5468\u671f\u95f4\u81f3\u5c11 1us \u7684\u6062\u590d\u65f6\u95f4\u3002\u5f53\u603b\u7ebf\u63a7\u5236\u5668\u628a\u6570\u636e\u7ebf\u4ece\u9ad8\u7535\u5e73\u62c9\u5230\u4f4e\u7535\u5e73\u65f6\uff0c\u8bfb\u65f6\u5e8f\u5f00\u59cb\uff0c\u6570\u636e\u7ebf\u5fc5\u987b\u81f3\u5c11\u4fdd\u6301 1us\uff0c\u7136\u540e\u603b\u7ebf\u88ab\u91ca\u653e\u3002<\/p>\n<p>\u5728\u603b\u7ebf\u63a7\u5236\u5668\u53d1\u51fa\u8bfb\u65f6\u5e8f\u540e\uff0cDS18B20 \u901a\u8fc7\u62c9\u9ad8\u6216\u62c9\u4f4e\u603b\u7ebf\u4e0a\u6765\u4f20\u8f93 1 \u6216 0\u3002\u5f53\u4f20\u8f93\u903b\u8f91 0 \u7ed3\u675f\u540e\uff0c\u603b\u7ebf\u5c06\u88ab\u91ca\u653e\uff0c\u901a\u8fc7\u4e0a\u62c9\u7535\u963b\u56de\u5230\u4e0a\u5347\u6cbf\u72b6\u6001\u3002\u4ece DS18B20 \u8f93\u51fa\u7684\u6570\u636e\u5728\u8bfb\u65f6\u5e8f\u7684\u4e0b\u964d\u6cbf\u51fa\u73b0\u540e 15us \u5185\u6709\u6548\u3002\u56e0\u6b64\uff0c\u603b\u7ebf\u63a7\u5236\u5668\u5728\u8bfb\u65f6\u5e8f\u5f00\u59cb\u540e\u5fc5\u987b\u505c\u6b62\u628a I\/O \u811a\u9a71\u52a8\u4e3a\u4f4e\u7535\u5e73 15us\uff0c\u4ee5\u8bfb\u53d6I\/O \u811a\u72b6\u6001\u3002<\/p>\n<p><img decoding=\"async\" width=\"723\" height=\"216\" referrerpolicy=\"no-referrer\" src=\"https:\/\/segmentfault.com\/img\/bVdfJoP\" alt=\"\" title=\"\" loading=\"lazy\"><\/p>\n<h2>4. \u7f16\u7a0b\u5b9e\u6218<\/h2>\n<p>\u5b9e\u6218\u76ee\u6807\uff1a\u4e32\u53e3\u6253\u5370\u6e29\u5ea6\u6570\u636e\u3002<\/p>\n<h3>4.1 \u786c\u4ef6\u63a5\u7ebf<\/h3>\n<p>\u672c\u6559\u7a0b\u4f7f\u7528\u7684\u786c\u4ef6\u5982\u4e0b\uff1a<\/p>\n<ul>\n<li>\u5355\u7247\u673a\uff1aSTM32F103C8T6<\/li>\n<li>\u6e29\u611f\u6a21\u5757\uff1aDS18B20<\/li>\n<li>\u4e32\u53e3\uff1aUSB \u8f6c TTL<\/li>\n<li>\u70e7\u5f55\u5668\uff1aST-LINK V2<\/li>\n<\/ul>\n<table>\n<thead>\n<tr>\n<th align=\"center\">DHT11<\/th>\n<th align=\"center\">STM32<\/th>\n<th align=\"center\">USB \u8f6c TTL<\/th>\n<\/tr>\n<\/thead>\n<tbody>\n<tr>\n<td align=\"center\">VCC<\/td>\n<td align=\"center\">3.3\/5V<\/td>\n<td align=\"center\"> <\/td>\n<\/tr>\n<tr>\n<td align=\"center\">DQ<\/td>\n<td align=\"center\">A11<\/td>\n<td align=\"center\"> <\/td>\n<\/tr>\n<tr>\n<td align=\"center\">GND<\/td>\n<td align=\"center\">G<\/td>\n<td align=\"center\"> <\/td>\n<\/tr>\n<tr>\n<td align=\"center\"> <\/td>\n<td align=\"center\">A10<\/td>\n<td align=\"center\">TX<\/td>\n<\/tr>\n<tr>\n<td align=\"center\"> <\/td>\n<td align=\"center\">A9<\/td>\n<td align=\"center\">RX<\/td>\n<\/tr>\n<tr>\n<td align=\"center\"> <\/td>\n<td align=\"center\">G<\/td>\n<td align=\"center\">GND<\/td>\n<\/tr>\n<\/tbody>\n<\/table>\n<p>\u70e7\u5f55\u7684\u65f6\u5019\u63a5\u7ebf\u5982\u4e0b\u8868\uff0c\u5982\u679c\u4e0d\u4f1a\u70e7\u5f55\u7684\u8bdd\u53ef\u4ee5\u770b\u6211\u4e4b\u524d\u7684\u6587\u7ae0\u3010<a href=\"https:\/\/link.segmentfault.com\/?enc=xMh4EDcbz24BxAu8eg16Nw%3D%3D.ZRtIvTb441dBEol5TNk%2FMFWl32LO4XW7t%2FhsTvhaa%2B8sRkhOsaPuVIF1WPH7DQU%2B%2FUWVSKsl7fxBRGkUYRUcMA8b%2B1jNqec7P9aq%2FoZJH3E%3D\" rel=\"nofollow noopener noreferrer\" target=\"_blank\">STM32\u4e0b\u8f7d\u7a0b\u5e8f\u7684\u4e94\u79cd\u65b9\u6cd5<\/a>\u3011\u3002<\/p>\n<table>\n<thead>\n<tr>\n<th align=\"center\">ST-Link V2<\/th>\n<th align=\"center\">STM32<\/th>\n<\/tr>\n<\/thead>\n<tbody>\n<tr>\n<td align=\"center\">SWCLK<\/td>\n<td align=\"center\">SWCLK<\/td>\n<\/tr>\n<tr>\n<td align=\"center\">SWDIO<\/td>\n<td align=\"center\">SWDIO<\/td>\n<\/tr>\n<tr>\n<td align=\"center\">GND<\/td>\n<td align=\"center\">GND<\/td>\n<\/tr>\n<tr>\n<td align=\"center\">3.3V<\/td>\n<td align=\"center\">3V3<\/td>\n<\/tr>\n<\/tbody>\n<\/table>\n<p>\u63a5\u597d\u5982\u4e0b\u56fe\u3002\u5f00\u53d1\u677f\u4f7f\u7528\u7684\u662f\u6211\u4eec\u81ea\u7ed8\u7684\u677f\u5b50\u3002\u5927\u5bb6\u4e5f\u53ef\u4ee5\u7528\u81ea\u5df1\u7684\u677f\u5b50\uff0c\u53ea\u8981\u662f STM32F103C8T6 \u4e3b\u63a7\u82af\u7247\u5c31\u884c\u3002<\/p>\n<p><img decoding=\"async\" width=\"723\" height=\"539\" referrerpolicy=\"no-referrer\" src=\"https:\/\/segmentfault.com\/img\/bVdfJoQ\" alt=\"\" title=\"\" loading=\"lazy\"><\/p>\n<h3>4.2 DS18B20\u521d\u59cb\u5316<\/h3>\n<p>\u56e0\u4e3a DS18B20 \u662f\u5355\u603b\u7ebf\uff0c\u6309\u7167\u5e38\u89c4\u601d\u7ef4\uff0cDS18B20 \u7684 DQ \u5f15\u811a\u6a21\u5f0f\u662f\u8981\u5728\u8f93\u5165\u548c\u63a8\u633d\u8f93\u51fa\u4e4b\u95f4\u5207\u6362\u7684\u3002\u4f46\u662f\u8fd9\u6837\u592a\u9ebb\u70e6\u4e86\uff0c\u6240\u4ee5\u6211\u4eec\u76f4\u63a5\u5c06 DS18B20 \u7684 DQ \u5f15\u811a\u6a21\u5f0f\u8bbe\u7f6e\u4e3a\u5f00\u6f0f\u8f93\u51fa + \u4e0a\u62c9\uff0c\u8fd9\u6837\u5c31\u4e0d\u7528\u518d\u8bbe\u7f6e IO \u65b9\u5411\u4e86\u3002\u5f00\u6f0f\u8f93\u51fa\u7684\u65f6\u5019\uff08=1\uff09 \u4e5f\u53ef\u4ee5\u8bfb\u53d6\u5916\u90e8\u4fe1\u53f7\u7684\u9ad8\u4f4e\u7535\u5e73\u3002<\/p>\n<p>\u5269\u4e0b\u7684\u5c31\u662f\u6309\u7167\u521d\u59cb\u5316\u65f6\u5e8f\u7f16\u5199\u4ee3\u7801\u3002<\/p>\n<pre><code class=\"c\">void DS18B20_Rst(void)\n{\n    DS18B20_DQ_OUT_LOW;         \/\/\u62c9\u4f4e\u603b\u7ebf\u5e76\u5ef6\u65f6750us\n    delay_us(750);\n\n    DS18B20_DQ_OUT_HIGH;        \/\/\u91ca\u653e\u603b\u7ebf\u4e3a\u9ad8\u7535\u5e73\u5e76\u5ef6\u65f6\u7b49\u5f8515~60us\n    delay_us(15);\n}\n\nuint8_t DS18B20_Check(void)\n{\n    uint8_t retry = 0;                      \/\/\u8109\u51b2\u6301\u7eed\u65f6\u95f4\n\n    while(DS18B20_DQ_IN &amp;&amp; retry &lt; 200){    \/\/\u7b49\u5f85DQ\u53d8\u4f4e, \u7b49\u5f85200us\n        retry++;\n        delay_us(1);\n    }\n\n    if(retry &gt;= 200)\n        return 1;\n    else\n        retry = 0;\n\n\n    while(!DS18B20_DQ_IN &amp;&amp; retry &lt; 240){    \/\/\u5224\u65adDS18B20\u662f\u5426\u91ca\u653e\u603b\u7ebf\n        retry++;\n        delay_us(1);\n    }\n    \n    if(retry &gt;= 240)\n        return 2;\n\n    return 0;\n}\n\nuint8_t DS18B20_Init(void)\n{\n    GPIO_InitTypeDef gpio_init_struct;\n    \n    DS18B20_DQ_GPIO_CLK_ENABLE();   \/* \u5f00\u542fDQ\u5f15\u811a\u65f6\u949f *\/\n\n    gpio_init_struct.Pin = DS18B20_DQ_GPIO_PIN;\n    gpio_init_struct.Mode = GPIO_MODE_OUTPUT_OD;            \/* \u5f00\u6f0f\u8f93\u51fa *\/\n    gpio_init_struct.Pull = GPIO_PULLUP;                    \/* \u4e0a\u62c9 *\/\n    gpio_init_struct.Speed = GPIO_SPEED_FREQ_HIGH;          \/* \u9ad8\u901f *\/\n    HAL_GPIO_Init(DS18B20_DQ_GPIO_PORT, &amp;gpio_init_struct); \/* \u521d\u59cb\u5316DS18B20_DQ\u5f15\u811a *\/\n\n    DS18B20_Rst();\n    return DS18B20_Check();\n}<\/code><\/pre>\n<h3>4.3 \u5199\/\u8bfb\u4e00\u4e2a\u5b57\u8282<\/h3>\n<p>\u6309\u7167\u65f6\u5e8f\u5199\u5c31\u53ef\u4ee5\u4e86\uff0c\u4e0d\u591a\u8bb2\u3002<\/p>\n<pre><code class=\"c\">void DS18B20_Write_Byte(uint8_t data)\n{\n    uint8_t i;\n    uint8_t databit;\n\n    for(i = 0; i &lt; 8; i++){\n        databit = data &amp; 0x01;       \/\/\u53d6\u6570\u636e\u6700\u4f4e\u4f4d\n        data = data &gt;&gt; 1;            \/\/\u53f3\u79fb\u4e00\u4f4d\n        if(databit){                 \/\/\u5f53\u524d\u4f4d\u51991\n            DS18B20_DQ_OUT_LOW;\n            delay_us(2);\n            DS18B20_DQ_OUT_HIGH;\n            delay_us(60);\n        }else{                       \/\/\u5f53\u524d\u4f4d\u51990\n            DS18B20_DQ_OUT_LOW;\n            delay_us(60);\n            DS18B20_DQ_OUT_HIGH;\n            delay_us(2);\n        }\n    }\n}\n\nuint8_t DS18B20_Read_Bit(void){\n    uint8_t data;\n\n    DS18B20_DQ_OUT_LOW;     \/\/\u81f3\u5c11\u62c9\u4f4e1us\uff0c\u5f00\u59cb\u8bfb\u65f6\u5e8f\n    delay_us(2);\n    DS18B20_DQ_OUT_HIGH;\n    delay_us(12);\n\n    if(DS18B20_DQ_IN)\n        data = 1;           \/\/\u8bfb\u52301\n    else\n        data = 0;           \/\/\u8bfb\u52300\n\n    delay_us(50);\n    return data;\n}\n\nuint8_t DS18B20_Read_Byte(void){\n    uint8_t i, b, data;\n    data = 0;\n    for(i = 0; i &lt; 8; i++){\n        b = DS18B20_Read_Bit();\n        data |= b &lt;&lt; i;         \/* \u586b\u5145data\u7684\u6bcf\u4e00\u4f4d *\/ \n     }\n    return data;\n}<\/code><\/pre>\n<h3>4.4 \u83b7\u53d6\u6e29\u5ea6<\/h3>\n<p>\u6e29\u5ea6\u8f6c\u6362\u547d\u4ee4\u662f 0x44\uff0c\u800c\u5728\u53d1\u8d77\u4e00\u6761 DS18B20 \u529f\u80fd\u6307\u4ee4\u4e4b\u524d\u5fc5\u987b\u5148\u53d1\u51fa\u4e00\u6761 ROM \u6307\u4ee4\uff0c\u5e76\u4e14\u6211\u4eec\u53ea\u6709\u4e00\u4e2a DS18B20\uff0c\u6240\u4ee5\u6211\u4eec\u5148\u8df3\u8fc7 ROM\uff0c\u518d\u53d1\u8d77\u6e29\u5ea6\u8f6c\u6362\u6307\u4ee4\u3002<\/p>\n<p>\u5982\u679c\u6e29\u5ea6\u4e3a\u8d1f\uff0c\u9700\u8981\u53d6\u53cd\u540e+1\uff0c\u56e0\u4e3a\u8003\u8651\u5230\u4f4e\u4f4d\u53ef\u80fd+1\u540e\u6709\u8fdb\u4f4d\u548c\u4ee3\u7801\u5197\u4f59\uff0c\u6240\u4ee5\u6211\u4eec\u653e\u5230\u6700\u540e\u5728 \u00d7 \u7cbe\u5ea6\u524d +1\u3002<\/p>\n<pre><code class=\"c\">void DS18B20_Start(void){\n    DS18B20_Rst();\n    DS18B20_Check();\n    DS18B20_Write_Byte(0xcc);       \/\/\u8df3\u8fc7ROM\n    DS18B20_Write_Byte(0x44);       \/\/\u6e29\u5ea6\u8f6c\u6362\u6307\u4ee4\n}\n\nuint16_t DS18B20_Get_Temperature(void){\n    uint8_t temp;\n    uint8_t TL,TH;\n    uint16_t temperature;\n\n    DS18B20_Start();                \/\/\u5f00\u59cb\u6e29\u5ea6\u8f6c\u6362\n    DS18B20_Rst();                  \/\/\u590d\u4f4dDS18B20\n    DS18B20_Check();                \/\/\u68c0\u6d4bDS18B20\u662f\u5426\u5b58\u5728\n    DS18B20_Write_Byte(0xcc);       \/\/\u8df3\u8fc7ROM\n    DS18B20_Write_Byte(0xbe);       \/\/\u8bfb\u6682\u5b58\u5668\n    TL = DS18B20_Read_Byte();       \/\/\u4f4e\u516b\u4f4d LSB\n    TH = DS18B20_Read_Byte();       \/\/\u9ad8\u516b\u4f4d MSB\n\n    if(TH&gt;0x70){                    \/\/\u5224\u65ad\u6e29\u5ea6\u503c\u662f\u5426\u4e3a\u8d1f\u6570\n        TH = ~TH;\n        TL = ~TL;\n        temp = 0;\n    }else\n        temp = 1;\n\n    temperature = TH;               \/\/\u83b7\u5f97\u9ad8\u516b\u4f4d\n    temperature &lt;&lt;= 8;\n    temperature += TL;              \/\/\u83b7\u5f97\u4f4e\u516b\u4f4d\n    \n    if (temp == 0)                  \/\/\u6e29\u5ea6\u4e3a\u8d1f\u9700\u8981\u52a0\u4e00\uff0c\u9ed8\u8ba4\u7cbe\u5ea6\u662f0.0625\n    {\n        temperature = (float)(temperature+1) * 0.625;\n        temperature = -temperature;\n    }\n    else\n    {\n        temperature = (float)temperature * 0.625;\n    }\n}<\/code><\/pre>\n<h3>4.5 \u4e3b\u51fd\u6570<\/h3>\n<p>\u4e3b\u51fd\u6570\u5982\u4e0b\uff1a<\/p>\n<pre><code class=\"c\">int main(void)\n{\n    float temperature;\n    HAL_Init();                         \/* \u521d\u59cb\u5316HAL\u5e93 *\/\n    stm32_clock_init(RCC_PLL_MUL9);     \/* \u8bbe\u7f6e\u65f6\u949f, 72Mhz *\/\n    uart1_init(115200);                 \/* \u4e32\u53e3\u521d\u59cb\u5316\uff0c\u6ce2\u7279\u7387115200 *\/\n\n    printf(&quot;DS1820\u5b9e\u9a8c\uff1a\/r\/n&quot;);\n\n    while(DS18B20_Init())               \/\/\u521d\u59cb\u5316DS18B20\uff0c\u540c\u65f6\u68c0\u6d4bDS18B20\u7684\u5b58\u5728\n    {\n        printf(&quot;DS18B20 \u521d\u59cb\u5316\u5931\u8d25\/r\/n&quot;);\n        delay_ms(500);\n     }\n        printf(&quot;DS18B20 \u521d\u59cb\u5316\u6210\u529f\/r\/n&quot;);\n\n    while(1)\n    {\n        temperature = DS18B20_Get_Temperature();    \/\/\u8bfb\u53d6\u6e29\u5ea6\n        if(temperature &lt; 0)\n        printf(&quot;\u5f53\u524d\u6e29\u5ea6\uff1a -%.2f \u2103\/r\/n&quot;,temperature\/10);\n        else\n        printf(&quot;\u5f53\u524d\u6e29\u5ea6\uff1a %.2f \u2103\/r\/n&quot;,temperature\/10);\n        delay_s(2);\n    }\n}<\/code><\/pre>\n<h3>4.6 \u6700\u7ec8\u6548\u679c<\/h3>\n<p>\u6548\u679c\u5982\u4e0b\uff0c\u6211\u7528\u624b\u6342\u4e86\u4e00\u4f1a DS18B20 \u518d\u653e\u5f00\uff0c\u53ef\u4ee5\u770b\u5230\u6e29\u5ea6\u4e0a\u5347\u4e86\u4e00\u4f1a\u53c8\u4e0b\u964d\u4e86\u3002<\/p>\n<p><img decoding=\"async\" width=\"592\" height=\"567\" referrerpolicy=\"no-referrer\" src=\"https:\/\/segmentfault.com\/img\/bVdfJoR\" alt=\"\" title=\"\" loading=\"lazy\"><\/p>\n<h2>5. \u5c0f\u7ed3<\/h2>\n<h2>\u901a\u8fc7\u672c\u6587\u7684\u5b66\u4e60\u4e0e\u5b9e\u8df5\uff0c\u76f8\u4fe1\u5927\u5bb6\u5df2\u7ecf\u4e86\u89e3\u5e76\u638c\u63e1 DS18B20 \u7684\u7279\u6027\u548c\u4f7f\u7528\uff0c\u80fd\u591f\u66f4\u597d\u5730\u5e94\u7528\u4e8e\u5d4c\u5165\u5f0f\u5f00\u53d1\u3002\u65e0\u8bba\u662f\u6784\u5efa\u667a\u80fd\u5bb6\u5c45\u7cfb\u7edf\u8fd8\u662f\u5f00\u53d1\u7269\u8054\u7f51\u8bbe\u5907\uff0cDS18B20 \u90fd\u53ef\u4ee5\u6210\u4e3a\u60a8\u7684\u5f97\u529b\u52a9\u624b\u3002\u611f\u8c22\u5404\u4f4d\u770b\u5b98\uff0cpeace and love\uff01<\/h2>\n<p><strong>\u53e6\u5916\uff0c\u60f3\u8fdb\u5927\u5382\u7684\u540c\u5b66\uff0c\u4e00\u5b9a\u8981\u597d\u597d\u5b66\u7b97\u6cd5\uff0c\u8fd9\u662f\u9762\u8bd5\u5fc5\u5907\u7684\u3002\u8fd9\u91cc\u51c6\u5907\u4e86\u4e00\u4efd BAT \u5927\u4f6c\u603b\u7ed3\u7684 LeetCode \u5237\u9898\u5b9d\u5178\uff0c\u5f88\u591a\u4eba\u9760\u5b83\u4eec\u8fdb\u4e86\u5927\u5382\u3002<\/strong><\/p>\n<p><img decoding=\"async\" width=\"286\" height=\"83\" referrerpolicy=\"no-referrer\" src=\"https:\/\/segmentfault.com\/img\/bVdaCCY\" alt=\"\" title=\"\" loading=\"lazy\"><\/p>\n<p><a href=\"https:\/\/link.segmentfault.com\/?enc=C4Uueh77dCLita5%2B9a87ug%3D%3D.AmAPGAx3wBfcR6%2FY19WaJP5Qro90%2FGI6y2bgQ5fYKaK0oThsSuLkir13oRAnjdHv\" rel=\"nofollow noopener noreferrer\" target=\"_blank\">\u5237\u9898 | LeetCode\u7b97\u6cd5\u5237\u9898\u795e\u5668\uff0c\u770b\u5b8c BAT \u968f\u4f60\u6311\uff01<\/a><\/p>\n<h3>\u6709\u6536\u83b7\uff1f\u5e0c\u671b\u8001\u94c1\u4eec\u6765\u4e2a\u4e09\u8fde\u51fb\uff0c\u7ed9\u66f4\u591a\u7684\u4eba\u770b\u5230\u8fd9\u7bc7\u6587\u7ae0<\/h3>\n<p><strong>\u63a8\u8350\u9605\u8bfb\uff1a<\/strong><\/p>\n<ul>\n<li><a href=\"https:\/\/link.segmentfault.com\/?enc=hSwJzq2mkXzS%2FZu4Vo5UVA%3D%3D.xnn9mn9MK3nX1zVedWHZ1XykCgS3HwJ2oe2D%2Bi%2BOx4LaiANs9%2F0fFxYvnjJi43MS\" rel=\"nofollow noopener noreferrer\" target=\"_blank\">\u7a0b\u5e8f\u5458\u5fc5\u5907\u7f16\u7a0b\u8d44\u6599\u5927\u5168<\/a><\/li>\n<li><a href=\"https:\/\/link.segmentfault.com\/?enc=zxuYNrKbhx7BHPFLZRPyxA%3D%3D.HqRBn78%2F0VxTx2tTnjDrGNbViuIPtazWh5FopzxuELOBMk9pXgTwClTuQD3tpiru\" rel=\"nofollow noopener noreferrer\" target=\"_blank\">\u7a0b\u5e8f\u5458\u5fc5\u5907\u8f6f\u4ef6\u8d44\u6e90<\/a><\/li>\n<\/ul>\n<p>\u6b22\u8fce\u5173\u6ce8\u6211\u7684\u535a\u5ba2\uff1a<a href=\"https:\/\/link.segmentfault.com\/?enc=A5WZIYN4TPwIfxkNi0GCsA%3D%3D.goYhvQSMkeN74OAsP%2FF%2FOnMNLhkpB8PkSl2UTW0C4n0%3D\" rel=\"nofollow noopener noreferrer\" target=\"_blank\">\u826f\u8bb8\u5d4c\u5165\u5f0f\u6559\u7a0b\u7f51<\/a>\uff0c\u6ee1\u6ee1\u90fd\u662f\u5e72\u8d27\uff01<\/p>\n<p><a href=\"https:\/\/segmentfault.com\/a\/1190000045656100\">https:\/\/segmentfault.com\/a\/1190000045656100<\/a><\/p>\n","protected":false},"excerpt":{"rendered":"<p>\u524d\u9762\u6211\u4eec\u5b66\u4e60 DHT11 \u7684\u65f6\u5019\u63d0\u5230\u4e86 DS18B20\uff0c\u5b83\u6709\u5f88\u5bbd\u7684\u6d4b\u6e29\u8303\u56f4\uff0c-55\u00b0C ~ 125\u00b0C\u3002\u90a3\u4e48\u672c [&hellip;]<\/p>\n","protected":false},"author":1,"featured_media":0,"comment_status":"open","ping_status":"open","sticky":false,"template":"","format":"standard","meta":{"_jetpack_memberships_contains_paid_content":false,"footnotes":""},"categories":[4],"tags":[],"class_list":["post-10020506","post","type-post","status-publish","format-standard","hentry","category-share"],"jetpack_sharing_enabled":true,"jetpack_featured_media_url":"","_links":{"self":[{"href":"https:\/\/itmax.cn\/index.php?rest_route=\/wp\/v2\/posts\/10020506","targetHints":{"allow":["GET"]}}],"collection":[{"href":"https:\/\/itmax.cn\/index.php?rest_route=\/wp\/v2\/posts"}],"about":[{"href":"https:\/\/itmax.cn\/index.php?rest_route=\/wp\/v2\/types\/post"}],"author":[{"embeddable":true,"href":"https:\/\/itmax.cn\/index.php?rest_route=\/wp\/v2\/users\/1"}],"replies":[{"embeddable":true,"href":"https:\/\/itmax.cn\/index.php?rest_route=%2Fwp%2Fv2%2Fcomments&post=10020506"}],"version-history":[{"count":0,"href":"https:\/\/itmax.cn\/index.php?rest_route=\/wp\/v2\/posts\/10020506\/revisions"}],"wp:attachment":[{"href":"https:\/\/itmax.cn\/index.php?rest_route=%2Fwp%2Fv2%2Fmedia&parent=10020506"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"https:\/\/itmax.cn\/index.php?rest_route=%2Fwp%2Fv2%2Fcategories&post=10020506"},{"taxonomy":"post_tag","embeddable":true,"href":"https:\/\/itmax.cn\/index.php?rest_route=%2Fwp%2Fv2%2Ftags&post=10020506"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}