{"id":921,"date":"2024-09-08T15:40:33","date_gmt":"2024-09-08T07:40:33","guid":{"rendered":"https:\/\/aoofoo.com\/?p=921"},"modified":"2024-09-10T17:33:22","modified_gmt":"2024-09-10T09:33:22","slug":"2-30-i2c%e9%80%9a%e4%bf%a1","status":"publish","type":"post","link":"https:\/\/aoofoo.com\/index.php\/2024\/09\/08\/2-30-i2c%e9%80%9a%e4%bf%a1\/","title":{"rendered":"2.30 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\u5f00\u6f0f\u4e0e\u63a8\u633d\u8f93\u51fa\u7684\u533a\u522b<\/p>\n<p>1. **\u63a8\u633d\u8f93\u51fa**\uff1a<br \/>\n&#8211; \u5728\u63a8\u633d\u914d\u7f6e\u4e2d\uff0c\u8f93\u51fa\u7aef\u53ef\u4ee5\u88ab\u9a71\u52a8\u5230\u9ad8\u7535\u5e73\uff08\u8fde\u63a5\u5230\u7535\u6e90Vcc\uff09\u6216\u4f4e\u7535\u5e73\uff08\u8fde\u63a5\u5230\u5730GND\uff09\u3002<br \/>\n&#8211; \u5f53\u4e24\u4e2a\u8bbe\u5907\u7684\u63a8\u633d\u8f93\u51fa\u8fde\u63a5\u5230\u540c\u4e00\u6761\u7ebf\uff08\u6bd4\u5982I2C\u7684SDA\u7ebf\uff09\u65f6\uff0c\u5982\u679c\u4e00\u4e2a\u8bbe\u5907\u8bd5\u56fe\u5c06\u7ebf\u62c9\u9ad8\uff08\u81f3Vcc\uff09\uff0c\u800c\u53e6\u4e00\u4e2a\u8bbe\u5907\u5c06\u7ebf\u62c9\u4f4e\uff08\u81f3GND\uff09\uff0c\u7ed3\u679c\u5c31\u662f\u8fd9\u4e24\u4e2a\u7535\u6e90\u4e4b\u95f4\u5f62\u6210\u4e86\u76f4\u63a5\u7684\u7535\u8fde\u63a5\uff0c\u8fd9\u5c31\u662f\u6240\u8c13\u7684\u201c\u7535\u6e90\u77ed\u8def\u201d\u3002<\/p>\n<p>2. **\u5f00\u6f0f\u8f93\u51fa**\uff1a<br \/>\n&#8211; 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\u4e3a\u4ec0\u4e48\u63a8\u633d\u8f93\u51fa\u4f1a\u5bfc\u81f4\u77ed\u8def\uff1f<\/p>\n<p>\u5728I2C\u901a\u4fe1\u4e2d\uff0cSDA\u548cSCL\u7ebf\u8def\u901a\u5e38\u88ab\u591a\u4e2a\u8bbe\u5907\u5171\u4eab\u3002\u5982\u679c\u4f7f\u7528\u63a8\u633d\u8f93\u51fa\uff0c\u8bbe\u5907A\u5c1d\u8bd5\u5c06SDA\u7ebf\u62c9\u9ad8\uff0c\u800c\u8bbe\u5907B\u540c\u65f6\u5c1d\u8bd5\u5c06\u5176\u62c9\u4f4e\uff0c\u5c31\u4f1a\u5728\u8bbe\u5907A\u7684\u8f93\u51fa\u7aef\uff08\u8fde\u63a5\u81f3Vcc\uff09\u548c\u8bbe\u5907B\u7684\u8f93\u51fa\u7aef\uff08\u8fde\u63a5\u81f3GND\uff09\u4e4b\u95f4\u5f62\u6210\u4e00\u4e2a\u76f4\u63a5\u7684\u8fde\u63a5\u3002\u8fd9\u79cd\u60c5\u51b5\u4e0b\uff0c\u7535\u6d41\u5c06\u76f4\u63a5\u4eceVcc\u901a\u8fc7\u8fd9\u4e24\u4e2a\u8bbe\u5907\u7684\u8f93\u51fa\u7aef\u6d41\u5411GND\uff0c\u9020\u6210\u7535\u6e90\u77ed\u8def\uff0c\u53ef\u80fd\u4f1a\u635f\u574f\u8bbe\u5907\uff0c\u5e76\u5bfc\u81f4\u7535\u6d41\u8fc7\u5927\u3002<\/p>\n<p>### \u4e3a\u4ec0\u4e48LED\u706f\u7684\u60c5\u51b5\u4e0d\u540c\uff1f<\/p>\n<p>\u70b9\u4eaeLED\u706f\u65f6\uff0c\u901a\u5e38\u662f\u5355\u4e00\u8def\u5f84\u7684\u7b80\u5355\u7535\u8def\uff0c\u7535\u6d41\u4ece\u7535\u6e90\u6d41\u7ecf\u9650\u6d41\u7535\u963b\u548cLED\uff0c\u7136\u540e\u56de\u5230GND\u3002\u6b64\u8fc7\u7a0b\u4e2d\uff0c\u53ea\u6709\u4e00\u4e2a\u63a7\u5236\u70b9\uff08\u901a\u5e38\u662f\u4e00\u4e2aGPIO\u5f15\u811a\uff09\uff0c\u4e0d\u5b58\u5728\u591a\u4e2a\u63a7\u5236\u70b9\u5c1d\u8bd5\u5bf9\u540c\u4e00\u7535\u8def\u65bd\u52a0\u4e0d\u540c\u7535\u4f4d\u7684\u60c5\u5f62\u3002\u56e0\u6b64\uff0c\u4e0d\u5b58\u5728\u63a8\u633d\u8f93\u51fa\u53ef\u80fd\u5bfc\u81f4\u7684\u77ed\u8def\u98ce\u9669\u3002<\/p>\n<p>### \u603b\u7ed3<\/p>\n<p>\u56e0\u6b64\uff0c\u5728\u8bbe\u8ba1\u4f7f\u7528I2C\u7b49\u5171\u4eab\u603b\u7ebf\u7684\u7cfb\u7edf\u65f6\uff0c\u9009\u62e9\u5f00\u6f0f\u8f93\u51fa\u662f\u4e3a\u4e86\u907f\u514d\u8fd9\u79cd\u7531\u4e8e\u591a\u4e2a\u8bbe\u5907\u540c\u65f6\u5c1d\u8bd5\u63a7\u5236\u603b\u7ebf\u72b6\u6001\u800c\u4ea7\u751f\u51b2\u7a81\u7684\u98ce\u9669\u3002\u5f00\u6f0f\u8f93\u51fa\uff0c\u914d\u5408\u4e0a\u62c9\u7535\u963b\uff0c\u5141\u8bb8\u4efb\u4f55\u4e00\u4e2a\u8bbe\u5907\u80fd\u5b89\u5168\u5730\u5c06\u7ebf\u8def\u62c9\u4f4e\uff0c\u800c\u5728\u6ca1\u6709\u8bbe\u5907\u62c9\u4f4e\u7ebf\u8def\u65f6\uff0c\u901a\u8fc7\u4e0a\u62c9\u7535\u963b\u81ea\u7136\u800c\u7136\u5730\u56de\u5230\u9ad8\u7535\u5e73\u72b6\u6001\uff0c\u4ece\u800c\u786e\u4fdd\u7cfb\u7edf\u7684\u7a33\u5b9a\u6027\u548c\u8bbe\u5907\u7684\u5b89\u5168\u3002<\/p>\n<p><\/div><\/div><\/div>\n<h3>\u8f6f\u4ef6\u89c4\u5b9a\uff08\u65f6\u5e8f\uff09<\/h3>\n<p><strong>\u8d77\u59cb\u6761\u4ef6\uff1aSCL\u9ad8\u7535\u5e73\u671f\u95f4\uff0cSDA\u4ece\u9ad8\u7535\u5e73\u5207\u6362\u5230\u4f4e\u7535\u5e73\u3002<\/strong><\/p>\n<p>I2C\u603b\u7ebf\u5904\u4e8e\u7a7a\u95f2\u72b6\u6001\u65f6\uff0cSCL\u548cSDA\u90fd\u5904\u4e8e\u9ad8\u7535\u5e73\uff0c\u5f53\u4e3b\u673a\u628aSDA\u4e0b\u62c9\uff0c\u4ece\u673a\u6355\u83b7\u5230SCL\u5904\u4e8e\u9ad8\u7535\u5e73\uff0cSDA\u5904\u4e8e\u4e0b\u964d\u6cbf\u7684\u4fe1\u53f7\u65f6\uff0c\u4ece\u673a\u5c31\u4f1a\u628a\u81ea\u8eab\u590d\u4f4d\uff0c\u7b49\u5f85\u4e3b\u673a\u7684\u53ec\u5524\u3002<\/p>\n<p>\u5728SDA\u4e0b\u964d\u6cbf\u4e4b\u540e\uff0c\u4e3b\u673a\u8981\u518d\u628aSCL\u62fd\u4e0b\u6765\uff0c\u4e00\u65b9\u9762\u662f\u8981\u5360\u7528\u8fd9\u4e2a\u4e3b\u7ebf\uff0c\u53e6\u4e00\u65b9\u9762\u4e5f\u662f\u4e3a\u4e86\u66f4\u65b9\u4fbf\u6211\u4eec\u8fd9\u4e9b\u57fa\u672c\u5355\u5143\u7684\u62fc\u63a5\uff0c\u5373\u4fdd\u8bc1\u9664\u4e86\u8d77\u59cb\u548c\u7ec8\u6b62\u6761\u4ef6\u5916\uff0c\u6bcf\u4e2a\u65f6\u5e8f\u5355\u5143\u7684SCL\u90fd\u662f\u4ee5\u4f4e\u7535\u5e73\u5f00\u59cb\uff0c\u4f4e\u7535\u5e73\u7ed3\u675f\u3002<\/p>\n<p><strong> \u7ec8\u6b62\u6761\u4ef6\uff1aSCL\u9ad8\u7535\u5e73\u671f\u95f4\uff0cSDA\u4ece\u4f4e\u7535\u5e73\u5207\u6362\u5230\u9ad8\u7535\u5e73\u3002<\/strong><\/p>\n<p>\u8d77\u59cb\u6761\u4ef6\u548c\u7ec8\u6b62\u6761\u4ef6\u90fd\u662f\u4e3b\u673a\u4ea7\u751f\u7684\uff0c\u4ece\u673a\u4e0d\u5141\u8bb8\u4ea7\u751f\u3002<\/p>\n<p><img loading=\"lazy\" decoding=\"async\" class=\"alignnone size-full wp-image-927\" src=\"https:\/\/aoofoo.com\/wp-content\/uploads\/2024\/09\/1-15.png\" alt=\"\" width=\"921\" height=\"273\" \/><\/p>\n<p><strong>\u4e3b\u673a\u53d1\u9001\u4e00\u4e2a\u5b57\u8282\u7684\u65f6\u5e8f\u5355\u5143\uff1a<\/strong><\/p>\n<p>\u4e3b\u4f4e\u653e\uff0c\u4ece\u9ad8\u53d6\u3002<\/p>\n<p>SCL\u4f4e\u7535\u5e73\u671f\u95f4\uff0c\u4e3b\u673a\u5c06\u6570\u636e\u4f4d\u4f9d\u6b21\u653e\u5230SDA\u7ebf\u4e0a\uff08\u9ad8\u4f4d\u5148\u884c\uff09\uff0c\u7136\u540e\u91ca\u653eSCL\uff0c\u4ece\u673a\u5c06\u5728SCL\u9ad8\u7535\u5e73\u671f\u95f4\u8bfb\u53d6\u6570\u636e\u4f4d\uff0c\u6240\u4ee5SCL\u9ad8\u7535\u5e73\u671f\u95f4SDA\u4e0d\u5141\u8bb8\u6709\u6570\u636e\u53d8\u5316\uff0c\u4f9d\u6b21\u5faa\u73af\u4e0a\u8ff0\u8fc7\u7a0b8\u6b21\uff0c\u5373\u53ef\u53d1\u9001\u4e00\u4e2a\u5b57\u8282\u3002<\/p>\n<p><img loading=\"lazy\" decoding=\"async\" class=\"alignnone wp-image-928\" src=\"https:\/\/aoofoo.com\/wp-content\/uploads\/2024\/09\/1-16.png\" alt=\"\" width=\"928\" height=\"253\" \/><\/p>\n<p>\u8981\u6ce8\u610f\u4e00\u4e0b\u662f\u9ad8\u4f4d\u5148\u884c\uff0c\u6240\u4ee5\u7b2c\u4e00\u4f4d\u662f\u4e00\u4e2a\u5b57\u8282\u7684\u6700\u9ad8\u4f4d\uff0c\u7b2c\u516b\u4f4d\u662f\u4e00\u4e2a\u5b57\u8282\u7684\u6700\u4f4e\u4f4d\u3002<\/p>\n<p>\u8fd9\u91cc\u4e3b\u673a\u5c31\u6bd4\u8f83\u60a0\u95f2\uff0c\u638c\u63a7\u7740\u65f6\u949f\u7ebf\u53ef\u4ee5\u6162\u6162\u60a0\u60a0\u7684\u653e\u6570\u636e\uff0c\u800c\u4ece\u673a\u5c31\u6bd4\u8f83\u6293\u9a6c\u4e86\uff0c\u5fc5\u987b\u5c3d\u5feb\u8bfb\u53d6\u6570\u636e\uff0c\u56e0\u4e3a\u4e3b\u673a\u53ef\u4e0d\u7b49\u4ece\u673a\u54df\u3002<\/p>\n<p><strong>\u4e3b\u673a\u63a5\u6536\u4e00\u4e2a\u5b57\u8282\u7684\u65f6\u5e8f\u5355\u5143\uff1a<\/strong><\/p>\n<p>\u4ece\u4f4e\u653e\uff0c\u9ad8\u4e3b\u53d6\u3002<\/p>\n<p>\u63a5\u6536\u4e00\u4e2a\u5b57\u8282\uff1aSCL\u4f4e\u7535\u5e73\u671f\u95f4\uff0c\u4ece\u673a\u5c06\u6570\u636e\u4f4d\u4f9d\u6b21\u653e\u5230SDA\u7ebf\u4e0a\uff08\u9ad8\u4f4d\u5148\u884c\uff09\uff0c\u7136\u540e\u91ca\u653eSCL\uff0c\u4e3b\u673a\u5c06\u5728SCL\u9ad8\u7535\u5e73\u671f\u95f4\u8bfb\u53d6\u6570\u636e\u4f4d\uff0c\u6240\u4ee5SCL\u9ad8\u7535\u5e73\u671f\u95f4SDA\u4e0d\u5141\u8bb8\u6709\u6570\u636e\u53d8\u5316\uff0c\u4f9d\u6b21\u5faa\u73af\u4e0a\u8ff0\u8fc7\u7a0b8\u6b21\uff0c\u5373\u53ef\u63a5\u6536\u4e00\u4e2a\u5b57\u8282\uff08\u4e3b\u673a\u5728\u63a5\u6536\u4e4b\u524d\uff0c\u9700\u8981\u91ca\u653eSDA\uff0c\u91ca\u653eSDA\u5c31\u76f8\u5f53\u4e8e\u5207\u6362\u6210\u8f93\u5165\u6a21\u5f0f\uff09\u3002<\/p>\n<p><img loading=\"lazy\" decoding=\"async\" class=\"alignnone wp-image-930\" src=\"https:\/\/aoofoo.com\/wp-content\/uploads\/2024\/09\/1-18.png\" alt=\"\" width=\"952\" height=\"236\" \/><\/p>\n<p>\u6240\u6709\u8bbe\u5907\u5305\u62ec\u4e3b\u673a\u90fd\u5904\u4e8e\u8f93\u5165\u6a21\u5f0f\uff0c\u5f53\u4e3b\u673a\u9700\u8981\u53d1\u9001\u7684\u65f6\u5019\uff0c\u5c31\u53ef\u4ee5\u4e3b\u52a8\u62c9\u4f4eSDA\uff1b\u800c\u4e3b\u673a\u5728\u88ab\u52a8\u63a5\u6536\u7684\u65f6\u5019\uff0c\u5c31\u5fc5\u987b\u5148\u91ca\u653eSDA\uff0c\u4e0d\u8981\u53bb\u52a8SDA\uff0c\u4ee5\u514d\u5f71\u54cd\u522b\u4eba\u53d1\u9001\uff0c\u56e0\u4e3a\u603b\u7ebf\u662f\u7ebf\u4e0e\u7684\u7279\u5f81\uff0c\u4efb\u4f55\u8bbe\u5907\u62c9\u4f4e\uff0c\u603b\u7ebf\u5c31\u662f\u4f4e\u7535\u5e73\u3002<\/p>\n<p><strong>\u5e94\u7b54\u673a\u5236\u7684\u65f6\u5e8f\u5355\u5143\uff1a<\/strong><\/p>\n<p>\u53d1\u9001\u5e94\u7b54\uff1a\u4e3b\u673a\u5728\u63a5\u6536\u5b8c\u4e00\u4e2a\u5b57\u8282\u4e4b\u540e\uff0c\u5728\u4e0b\u4e00\u4e2a\u65f6\u949f\u53d1\u9001\u4e00\u4f4d\u6570\u636e\uff0c\u6570\u636e0\u8868\u793a\u5e94\u7b54\uff0c\u6570\u636e1\u8868\u793a\u975e\u5e94\u7b54\u3002<\/p>\n<p>\u63a5\u6536\u5e94\u7b54\uff1a\u4e3b\u673a\u5728\u53d1\u9001\u5b8c\u4e00\u4e2a\u5b57\u8282\u4e4b\u540e\uff0c\u5728\u4e0b\u4e00\u4e2a\u65f6\u949f\u63a5\u6536\u4e00\u4f4d\u6570\u636e\uff0c\u5224\u65ad\u4ece\u673a\u662f\u5426\u5e94\u7b54\uff0c\u6570\u636e0\u8868\u793a\u5e94\u7b54\uff0c\u6570\u636e1\u8868\u793a\u975e\u5e94\u7b54\uff08\u4e3b\u673a\u5728\u63a5\u6536\u4e4b\u524d\uff0c\u9700\u8981\u91ca\u653eSDA\uff09\u3002<\/p>\n<p><img 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