{"id":117,"date":"2016-08-03T01:39:15","date_gmt":"2016-08-02T17:39:15","guid":{"rendered":"https:\/\/www.tiferking.cn\/?p=117"},"modified":"2023-01-30T15:13:24","modified_gmt":"2023-01-30T07:13:24","slug":"iic%e6%80%bb%e7%ba%bf%e5%8d%8f%e8%ae%ae%e5%b0%8f%e8%ae%b0-%e9%99%84%e5%87%bd%e6%95%b0%e5%ba%93","status":"publish","type":"post","link":"https:\/\/www.tiferking.cn\/index.php\/2016\/08\/03\/117\/","title":{"rendered":"IIC\u603b\u7ebf\u534f\u8bae\u5c0f\u8bb0 \u9644\u51fd\u6570\u5e93"},"content":{"rendered":"\n

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\"I\u00b2C_bus_logo.svg\"<\/figure>\n\n\n\n

\u9996\u5148\u6765\u8c08\u8c08IIC(Inter-Integrated Circuit, \u53c8\u53ebI2C, I\u00b2C)\u534f\u8bae\uff0c\u5b83\u662f\u4e00\u4e2a\u5355\u4e3b\u673a\u591a\u4ece\u673a\u7684\u534a\u53cc\u5de5\u901a\u4fe1\u534f\u8bae<\/strong>\uff0c\u6240\u6709\u8bbe\u5907\u901a\u8fc7\u4e24\u6839<\/strong>\u4fe1\u53f7\u7ebf\u8fdb\u884c\u8fde\u63a5\uff0c\u4e00\u6839\u662fSDA(Serial Data Line, \u4e32\u884c\u6570\u636e\u7ebf)\uff0c\u53e6\u4e00\u6839\u662fSCL(Serial Clock Line, \u4e32\u884c\u65f6\u949f\u7ebf)\uff0c\u8fd9\u4e24\u6839\u7ebf\u7f06\u9700\u8981\u901a\u8fc7\u7535\u963b\u88ab\u4e0a\u62c9<\/strong>\u81f3\u7535\u6e90\u7535\u538b\u3002\u5e76\u4e14\u7cfb\u7edf\u4e4b\u95f4\u9700\u8981\u8fdb\u884c\u5171\u5730<\/strong>\u3002\u8fd9\u4e5f\u8868\u660eIIC\u603b\u7ebf\u4ec5\u9700\u8981\u4e09\u6839<\/strong>\u7ebf\u7f06\u5c31\u53ef\u4ee5\u8fdb\u884c\u8bbe\u5907\u95f4\u7684\u901a\u4fe1\u3002\u4e0b\u56fe\u53ef\u4ee5\u8868\u793aIIC\u8bbe\u5907\u4e4b\u95f4\u7684\u8fde\u63a5\u65b9\u5f0f\u3002\"I2C.svg\"<\/a><\/p>\n\n\n\n

IIC\u603b\u7ebf\u7684\u4f18\u70b9\u663e\u800c\u6613\u89c1\uff0c\u5b83\u53ef\u4ee5\u5c06\u8bb8\u591a\u8bbe\u5907\u7a7f\u5728\u6781\u5c11\u7684\u7ebf\u7f06\u4e0a\uff0c\u5e76\u5bf9\u5b83\u4eec\u8fdb\u884c\u9ad8\u6548\u7684\u7ba1\u7406\u548c\u4f7f\u7528\u3002\u5355\u4e2aIIC\u6a21\u5757\u53ef\u4ee5\u5de5\u4f5c\u5728\u4e24\u79cd\u4e0d\u540c\u7684\u6a21\u5f0f\u4e0a\uff0c\u4e00\u4e2a\u662f\u4e3b\u673a\u6a21\u5f0f<\/strong>\uff0c\u5b83\u53ef\u4ee5\u4ea7\u751f\u65f6\u949f\u4fe1\u53f7\u5e76\u4e14\u4e3b\u52a8\u4e0e\u5176\u5b83\u4ece\u673a\u901a\u4fe1\uff0c\u53e6\u4e00\u4e2a\u662f\u4ece\u673a\u6a21\u5f0f<\/strong>\uff0c\u5b83\u4fbf\u662f\u7b49\u5f85\u4e3b\u673a\u53d1\u6765\u7684\u5730\u5740\uff0c\u5f53\u4e0e\u81ea\u5df1\u7684\u5730\u5740\u60f3\u5339\u914d\u540e\u4fbf\u5728\u56de\u590dACK\u4e4b\u540e\u7ee7\u7eed\u8fdb\u884c\u6570\u636e\u63a5\u6536<\/strong>\u6216\u53d1\u9001<\/strong>\u3002<\/p>\n\n\n\n

IIC\u4e2d\u6700\u57fa\u672c\u7684\u95ee\u9898\u5c31\u662f\u53d1\u9001\u548c\u63a5\u6536\u6570\u636e\u7684\u8fc7\u7a0b\u3002IIC\u603b\u7ebf\u8981\u6c42\u5728\u6570\u636e\u4f20\u8f93\u7684\u8fc7\u7a0b\u4e2d\uff0c\u6bcf\u5f53SCL\u4e3a\u9ad8\u7535\u5e73\u65f6\uff0cSDA\u4e0a\u7535\u5e73\u5fc5\u987b\u4fdd\u6301\u4e0d\u53d8\uff0c\u5f53SCL\u4e3a\u4f4e\u7535\u5e73\u65f6\uff0cSDA\u4e0a\u7684\u7535\u5e73\u53ef\u4ee5\u53d1\u751f\u6539\u53d8\u3002<\/strong>\u4f46\u662f\u6709\u4e24\u79cd\u60c5\u51b5\u4f8b\u5916\uff0c\u4e00\u79cd\u662f\u5f00\u59cb\u4fe1\u53f7\uff0c\u5b83\u7531\u5728SCL\u4e3a\u9ad8\u7535\u5e73\u7684\u65f6\u5019SDA\u4ea7\u751f\u4e0b\u964d\u6cbf\u6765\u53d1\u9001<\/strong>\uff0c\u53e6\u4e00\u79cd\u662f\u7ed3\u675f\u4fe1\u53f7\uff0c\u5b83\u7531\u5728SCL\u4e3a\u9ad8\u7535\u5e73\u65f6\u5019SDA\u4ea7\u751f\u4e0a\u5347\u6cbf\u6765\u53d1\u9001\u3002<\/strong><\/p>\n\n\n\n

\u9996\u5148IIC\u5728\u53d1\u9001\u6570\u636e\u524d\u8981\u5148\u53d1\u9001\u5f00\u59cb\u4fe1\u53f7\uff0c\u8fd9\u4e2a\u65f6\u5019\u5728\u65f6\u949f\u7ebf(SCL)\u4e3a\u9ad8\u7535\u5e73\u65f6\uff0c\u6570\u636e\u7ebf(SDA)\u53d1\u751f\u4e86\u4ece\u9ad8\u7535\u5e73\u5230\u4f4e\u7535\u5e73\u7684\u8df3\u53d8\u3002\u5728\u7d27\u63a5\u7740<\/strong>\u7684\u4e0b\u4e00\u4e2a\u65f6\u949f\u7ebf\u4e3a\u9ad8\u7684\u65f6\u5019\u5373\u4e3a\u7b2c\u4e00\u4f4d\u6570\u636e\uff0c\u4ece1-8\u516b\u4e2a\u6570\u636e\u4f9d\u6b21\u53d1\u9001\u5b8c\u6bd5\u540e\u7684\u7d27\u63a5\u7740\u7684\u4e00\u4e2a\u65f6\u949f\u5468\u671f<\/strong>\u4e3a\u4ece\u673a\u7684\u786e\u8ba4\u4f4d\uff0c\u5982\u679c\u8fd9\u65f6\u6570\u636e\u7ebf\u88ab\u4ece\u673a\u62c9\u4f4e\u8868\u660e\u4ece\u673a\u5df2\u63a5\u6536\u5230\u6570\u636e\u3002\u8fd9\u65f6\u4e3b\u673a\u4fbf\u53ef\u7ee7\u7eed\u4f9d\u6b21\u53d1\u9001\u4e0b\u516b\u4f4d\u6570\u636e\uff0c\u76f4\u5230\u53d1\u9001\u7ed3\u675f\u3002\"1024px-I2C_data_transfer.svg\"<\/a><\/p>\n\n\n\n

IIC\u534f\u8bae\u5728\u8fdb\u884c\u6570\u636e\u4f20\u8f93\u7684\u65f6\u5019\u9700\u8981\u5728\u7b2c\u4e00\u5e27\u6570\u636e\u4e2d\u53d1\u9001\u8bbe\u5907\u7684\u5730\u5740\uff0c\u8bbe\u5907\u7684\u5730\u5740\u4e00\u822c\u53ef\u4ee5\u4ece\u624b\u518c\u4e0a\u67e5\u5230\u3002\u5c06\u5176\u4e0a\u79fb\u4e00\u4f4d\uff0c\u5f62\u6210\u9ad8\u4e03\u4f4d\u7684\u4e03\u4f4d\u8bbe\u5907\u5730\u5740<\/strong>\uff0c\u6700\u4f4e\u4f4d\u586b\u51650\u8868\u793a\u5199\u5165\u4ece\u673a\u6570\u636e\uff0c\u586b\u51651\u8868\u793a\u8bfb\u53d6\u4ece\u673a\u6570\u636e<\/strong>\u3002\u4f46\u662fIIC\u534f\u8bae\u5f53\u4e2d\u8bfb\u53d6\u64cd\u4f5c\u5f80\u5f80\u6bd4\u5199\u5165\u64cd\u4f5c\u66f4\u4e3a\u56f0\u96be\uff0c\u56e0\u4e3a\u5f53IIC\u9700\u8981\u4ece\u4ece\u673a\u8bfb\u53d6\u6570\u636e\u7684\u65f6\u5019\uff0c\u5f80\u5f80\u9700\u8981\u5148\u4ee5\u5199\u5165\u6a21\u5f0f\u5199\u5165\u4e00\u4e9b\u64cd\u4f5c\u547d\u4ee4\uff0c\u518d\u5bf9\u4ece\u673a\u8fd4\u56de\u503c\u8fdb\u884c\u5206\u6790\u548c\u8c03\u8bd5\u3002<\/p>\n\n\n\n

IIC\u603b\u7ebf\u5728\u901a\u4fe1\u534f\u8bae\u4e2d\u57fa\u672c\u53ef\u4ee5\u5206\u4e3a\u4ee5\u4e0b\u51e0\u4e2a\u6b65\u9aa4\uff1a<\/p>\n\n\n\n

1.\u5199\u6570\u636e\uff1a\u901a\u8fc7IIC\u53d1\u9001\uff1a\u5f00\u59cb->\u5730\u5740+\u5199->\u5199\u5165\u547d\u4ee4->\u5199\u5165\u6570\u636e->\u7ed3\u675f\u3002<\/p>\n\n\n\n

2.\u8bfb\u6570\u636e\uff1a\u901a\u8fc7IIC\u63a5\u6536\uff1a\u5f00\u59cb->\u5730\u5740+\u5199->\u8bfb\u53d6\u547d\u4ee4->\u5f00\u59cb->\u5730\u5740+\u8bfb->\u8bbe\u5907\u8fd4\u56de\u6570\u636e->\u7ed3\u675f\u3002<\/p>\n\n\n\n

\u56e0\u4e3a\u8bfb\u6570\u636e\u7684\u65f6\u5019\u9700\u8981\u5148\u884c\u5199\u5165\u8bfb\u53d6\u547d\u4ee4\u624d\u53ef\u4ee5\u6b63\u786e\u7684\u8bfb\u51fa\u6570\u636e\uff0c\u6240\u4ee5\u901a\u8fc7IIC\u8bfb\u6570\u636e\u591a\u4e86\u4e00\u70b9\u5de5\u5e8f\u3002<\/p>\n\n\n\n

\u5728\u9644\u4e0a\u7684IIC\u51fd\u6570\u5e93\u5f53\u4e2d\uff0c\u4ec5\u6709\u4e24\u4e2a\u51fd\u6570\uff0c\u4e00\u4e2a\u662fIIC_Write\uff0c\u53e6\u4e00\u4e2a\u662fIIC_Read\uff0c\u901a\u8fc7\u914d\u7f6e\u597d\u5934\u6587\u4ef6\u4e2d\u7684Config<\/strong>\uff0c\u4fbf\u53ef\u6b63\u5e38\u4f7f\u7528\u3002\u51fd\u6570\u58f0\u660e\u5982\u4e0b\uff1a<\/p>\n\n\n\n

void IIC_Write(unsigned char const dev_add,unsigned char const *write_cmd,unsigned char const cmd_size,unsigned char const *data,unsigned char const data_size);\nvoid IIC_Read(unsigned char const dev_add,unsigned char const *read_cmd,unsigned char const cmd_size,unsigned char *data,unsigned char const data_size);<\/pre>\n\n\n\n
\u5728IIC_Write\u51fd\u6570\u4e2d\uff0c\u8f93\u5165\u4f9d\u6b21\u4e3aIIC\u8bbe\u5907\u5730\u5740\uff0cIIC\u5199\u5165\u547d\u4ee4\u6570\u7ec4\uff0cIIC\u5199\u5165\u547d\u4ee4\u957f\u5ea6\uff0cIIC\u5199\u5165\u6570\u636e\u6570\u7ec4\uff0cIIC\u5199\u5165\u6570\u636e\u957f\u5ea6\u3002\u4e24\u4e2a\u6570\u7ec4\u5747\u7528const\u6307\u9488\u4f20\u5165\uff0c\u5e76\u4e14\u7528\u6237\u5e94\u8be5\u4fdd\u8bc1\u6307\u9488\u540e\u957f\u5ea6\u8303\u56f4\u5185\u7684\u6240\u6709\u4f4d\u5e94\u8be5\u6709\u610f\u4e49<\/strong>\u3002\u5728IIC_Read\u51fd\u6570\u4e2d\uff0c\u8f93\u5165\u4f9d\u6b21\u4e3aIIC\u8bbe\u5907\u5730\u5740\uff0cIIC\u8bfb\u53d6\u547d\u4ee4\u6570\u7ec4\uff0cIIC\u8bfb\u53d6\u547d\u4ee4\u957f\u5ea6\uff0cIIC\u8bfb\u53d6\u6570\u636e\u5b58\u50a8\u5730\u5740\uff0cIIC\u8bfb\u53d6\u6570\u636e\u957f\u5ea6\u3002\u901a\u8fc7IIC\u53d1\u9001\u81f3\u4e3b\u673a\u7684\u6570\u636e\u5c06\u7531IIC_Read\u6355\u6349\u5e76\u83b7\u53d6\u3002\u5f53\u4e24\u4e2a\u51fd\u6570\u4e2d\u4efb\u610f\u4e00\u4e2a\u6570\u7ec4\u9700\u8981\u8f93\u5165\u7a7a\u6570\u7ec4\u7684\u65f6\u5019\uff0c\u5219\u4ec5\u9700\u8981\u5c06\u53c2\u6570\u7684\u4f4d\u7f6e\u4e0a\u8f93\u5165EMPTY<\/strong>\uff0c\u5e76\u5c06\u5176\u957f\u5ea6\u7f6e\u4e3a0<\/strong>\u5373\u53ef\u3002<\/p>\n\n\n\n
\u9644\u4ef6\uff1a<\/p>\n\n\n\n
IIC<\/a> –IIC\u5e93\u6e90\u7801\u3002<\/p>\n\n\n\n
*\u6ce8\uff1a\u56fe\u7247\u5747\u6765\u81ea\u7ef4\u57fa\u767e\u79d1\u3002<\/em><\/p>\n","protected":false},"excerpt":{"rendered":"
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