{"id":458,"date":"2014-04-06T16:02:25","date_gmt":"2014-04-06T08:02:25","guid":{"rendered":"http:\/\/www.apkdog.com\/?p=458"},"modified":"2014-04-06T16:02:25","modified_gmt":"2014-04-06T08:02:25","slug":"%e7%ae%80%e5%8d%95%e7%9a%84i2c%e5%8d%8f%e8%ae%ae%e7%90%86%e8%a7%a3","status":"publish","type":"post","link":"http:\/\/www.51cos.com\/?p=458","title":{"rendered":"\u7b80\u5355\u7684I2C\u534f\u8bae\u7406\u89e3"},"content":{"rendered":"

\u7b80\u5355\u7684I2C\u534f\u8bae\u7406\u89e3<\/p>\n

i2c\u534f\u8bae\uff08\u4e2d\u6587\u7248\uff09http:\/\/download.csdn.net\/source\/499286
\n\u4e00. \u6280\u672f\u6027\u80fd:
\n \u5de5\u4f5c\u901f\u7387\u6709100K\u548c400K\u4e24\u79cd\uff1b
\n \u652f\u6301\u591a\u673a\u901a\u8baf\uff1b
\n \u652f\u6301\u591a\u4e3b\u63a7\u6a21\u5757\uff0c\u4f46\u540c\u4e00\u65f6\u523b\u53ea\u5141\u8bb8\u6709\u4e00\u4e2a\u4e3b\u63a7\uff1b
\n \u7531\u6570\u636e\u7ebfSDA\u548c\u65f6\u949fSCL\u6784\u6210\u7684\u4e32\u884c\u603b\u7ebf\uff1b
\n \u6bcf\u4e2a\u7535\u8def\u548c\u6a21\u5757\u90fd\u6709\u552f\u4e00\u7684\u5730\u5740\uff1b
\n \u6bcf\u4e2a\u5668\u4ef6\u53ef\u4ee5\u4f7f\u7528\u72ec\u7acb\u7535\u6e90<\/p>\n

\u4e8c. \u57fa\u672c\u5de5\u4f5c\u539f\u7406:
\n \u4ee5\u542f\u52a8\u4fe1\u53f7START\u6765\u638c\u7ba1\u603b\u7ebf\uff0c\u4ee5\u505c\u6b62\u4fe1\u53f7STOP\u6765\u91ca\u653e\u603b\u7ebf\uff1b
\n \u6bcf\u6b21\u901a\u8baf\u4ee5START\u5f00\u59cb\uff0c\u4ee5STOP\u7ed3\u675f\uff1b
\n \u542f\u52a8\u4fe1\u53f7START\u540e\u7d27\u63a5\u7740\u53d1\u9001\u4e00\u4e2a\u5730\u5740\u5b57\u8282\uff0c\u5176\u4e2d7\u4f4d\u4e3a\u88ab\u63a7\u5668\u4ef6\u7684\u5730\u5740\u7801\uff0c\u4e00\u4f4d\u4e3a\u8bfb\/\u5199\u63a7\u5236\u4f4dR\/W,R. \/W\u4f4d\u4e3a0\u8868\u793a\u7531\u4e3b\u63a7\u5411\u88ab\u63a7\u5668\u4ef6\u5199\u6570\u636e\uff0cR\/W\u4e3a1\u8868\u793a\u7531\u4e3b\u63a7\u5411\u88ab\u63a7\u5668\u4ef6\u8bfb\u6570\u636e\uff1b
\n \u5f53\u88ab\u63a7\u5668\u4ef6\u68c0\u6d4b\u5230\u6536\u5230\u7684\u5730\u5740\u4e0e\u81ea\u5df1\u7684\u5730\u5740\u76f8\u540c\u65f6\uff0c\u5728\u7b2c9\u4e2a\u65f6\u949f\u671f\u95f4\u53cd\u9988\u5e94\u7b54\u4fe1\u53f7\uff1b
\n \u6bcf\u4e2a\u6570\u636e\u5b57\u8282\u5728\u4f20\u9001\u65f6\u90fd\u662f\u9ad8\u4f4d(MSB)\u5728\u524d\uff1b<\/p>\n

\u5199\u901a\u8baf\u8fc7\u7a0b:
\n 1. \u4e3b\u63a7\u5728\u68c0\u6d4b\u5230\u603b\u7ebf\u7a7a\u95f2\u7684\u72b6\u51b5\u4e0b\uff0c\u9996\u5148\u53d1\u9001\u4e00\u4e2aSTART\u4fe1\u53f7\u638c\u7ba1\u603b\u7ebf\uff1b
\n 2. \u53d1\u9001\u4e00\u4e2a\u5730\u5740\u5b57\u8282(\u5305\u62ec7\u4f4d\u5730\u5740\u7801\u548c\u4e00\u4f4dR\/W)\uff1b
\n 3. \u5f53\u88ab\u63a7\u5668\u4ef6\u68c0\u6d4b\u5230\u4e3b\u63a7\u53d1\u9001\u7684\u5730\u5740\u4e0e\u81ea\u5df1\u7684\u5730\u5740\u76f8\u540c\u65f6\u53d1\u9001\u4e00\u4e2a\u5e94\u7b54\u4fe1\u53f7(ACK)\uff1b
\n 4. \u4e3b\u63a7\u6536\u5230ACK\u540e\u5f00\u59cb\u53d1\u9001\u7b2c\u4e00\u4e2a\u6570\u636e\u5b57\u8282\uff1b
\n 5. \u88ab\u63a7\u5668\u6536\u5230\u6570\u636e\u5b57\u8282\u540e\u53d1\u9001\u4e00\u4e2aACK\u8868\u793a\u7ee7\u7eed\u4f20\u9001\u6570\u636e\uff0c\u53d1\u9001NACK\u8868\u793a\u4f20\u9001\u6570\u636e\u7ed3\u675f\uff1b
\n 6. \u4e3b\u63a7\u53d1\u9001\u5b8c\u5168\u90e8\u6570\u636e\u540e\uff0c\u53d1\u9001\u4e00\u4e2a\u505c\u6b62\u4f4dSTOP\uff0c\u7ed3\u675f\u6574\u4e2a\u901a\u8baf\u5e76\u4e14\u91ca\u653e\u603b\u7ebf\uff1b<\/p>\n

\u8bfb\u901a\u8baf\u8fc7\u7a0b:
\n 1. \u4e3b\u63a7\u5728\u68c0\u6d4b\u5230\u603b\u7ebf\u7a7a\u95f2\u7684\u72b6\u51b5\u4e0b\uff0c\u9996\u5148\u53d1\u9001\u4e00\u4e2aSTART\u4fe1\u53f7\u638c\u7ba1\u603b\u7ebf\uff1b
\n 2. \u53d1\u9001\u4e00\u4e2a\u5730\u5740\u5b57\u8282(\u5305\u62ec7\u4f4d\u5730\u5740\u7801\u548c\u4e00\u4f4dR\/W)\uff1b
\n 3. \u5f53\u88ab\u63a7\u5668\u4ef6\u68c0\u6d4b\u5230\u4e3b\u63a7\u53d1\u9001\u7684\u5730\u5740\u4e0e\u81ea\u5df1\u7684\u5730\u5740\u76f8\u540c\u65f6\u53d1\u9001\u4e00\u4e2a\u5e94\u7b54\u4fe1\u53f7(ACK)\uff1b
\n 4. \u4e3b\u63a7\u6536\u5230ACK\u540e\u91ca\u653e\u6570\u636e\u603b\u7ebf\uff0c\u5f00\u59cb\u63a5\u6536\u7b2c\u4e00\u4e2a\u6570\u636e\u5b57\u8282\uff1b
\n 5. \u4e3b\u63a7\u6536\u5230\u6570\u636e\u540e\u53d1\u9001ACK\u8868\u793a\u7ee7\u7eed\u4f20\u9001\u6570\u636e\uff0c\u53d1\u9001NACK\u8868\u793a\u4f20\u9001\u6570\u636e\u7ed3\u675f\uff1b
\n 6. \u4e3b\u63a7\u53d1\u9001\u5b8c\u5168\u90e8\u6570\u636e\u540e\uff0c\u53d1\u9001\u4e00\u4e2a\u505c\u6b62\u4f4dSTOP\uff0c\u7ed3\u675f\u6574\u4e2a\u901a\u8baf\u5e76\u4e14\u91ca\u653e\u603b\u7ebf\uff1b<\/p>\n

\u56db. \u603b\u7ebf\u4fe1\u53f7\u65f6\u5e8f\u5206\u6790
\n 1. \u603b\u7ebf\u7a7a\u95f2\u72b6\u6001
\n SDA\u548cSCL\u4e24\u6761\u4fe1\u53f7\u7ebf\u90fd\u5904\u4e8e\u9ad8\u7535\u5e73\uff0c\u5373\u603b\u7ebf\u4e0a\u6240\u6709\u7684\u5668\u4ef6\u90fd\u91ca\u653e\u603b\u7ebf\uff0c\u4e24\u6761\u4fe1\u53f7\u7ebf\u5404\u81ea\u7684\u4e0a\u62c9\u7535\u963b\u628a\u7535\u5e73\u62c9\u9ad8\uff1b
\n 2. \u542f\u52a8\u4fe1\u53f7START
\n \u65f6\u949f\u4fe1\u53f7SCL\u4fdd\u6301\u9ad8\u7535\u5e73\uff0c\u6570\u636e\u4fe1\u53f7SDA\u7684\u7535\u5e73\u88ab\u62c9\u4f4e(\u5373\u8d1f\u8df3\u53d8)\u3002\u542f\u52a8\u4fe1\u53f7\u5fc5\u987b\u662f\u8df3\u53d8\u4fe1\u53f7\uff0c\u800c\u4e14\u5728\u5efa\u7acb\u8be5\u4fe1\u53f7\u524d\u5fc5\u4fee\u4fdd\u8bc1\u603b\u7ebf\u5904\u4e8e\u7a7a\u95f2\u72b6\u6001\uff1b
\n 3. \u505c\u6b62\u4fe1\u53f7STOP
\n \u65f6\u949f\u4fe1\u53f7SCL\u4fdd\u6301\u9ad8\u7535\u5e73\uff0c\u6570\u636e\u7ebf\u88ab\u91ca\u653e\uff0c\u4f7f\u5f97SDA\u8fd4\u56de\u9ad8\u7535\u5e73(\u5373\u6b63\u8df3\u53d8)\uff0c\u505c\u6b62\u4fe1\u53f7\u4e5f\u5fc5\u987b\u662f\u8df3\u53d8\u4fe1\u53f7\u3002
\n 4. \u6570\u636e\u4f20\u9001
\n SCL\u7ebf\u5448\u73b0\u9ad8\u7535\u5e73\u671f\u95f4\uff0cSDA\u7ebf\u4e0a\u7684\u7535\u5e73\u5fc5\u987b\u4fdd\u6301\u7a33\u5b9a\uff0c\u4f4e\u7535\u5e73\u8868\u793a0(\u6b64\u65f6\u7684\u7ebf\u7535\u538b\u4e3a\u5730\u7535\u538b)\uff0c\u9ad8\u7535\u5e73\u8868\u793a1(\u6b64\u65f6\u7684\u7535\u538b\u7531\u5143\u5668\u4ef6\u7684VDD\u51b3\u5b9a)\u3002\u53ea\u6709\u5728SCL\u7ebf\u4e3a\u4f4e\u7535\u5e73\u671f\u95f4\uff0cSDA\u4e0a\u7684\u7535\u5e73\u5141\u8bb8\u53d8\u5316\u3002
\n 5. \u5e94\u7b54\u4fe1\u53f7ACK
\n I2C\u603b\u7ebf\u7684\u6570\u636e\u90fd\u662f\u4ee5\u5b57\u8282(8\u4f4d)\u7684\u65b9\u5f0f\u4f20\u9001\u7684\uff0c\u53d1\u9001\u5668\u4ef6\u6bcf\u53d1\u9001\u4e00\u4e2a\u5b57\u8282\u4e4b\u540e\uff0c\u5728\u65f6\u949f\u7684\u7b2c9\u4e2a\u8109\u51b2\u671f\u95f4\u91ca\u653e\u6570\u636e\u603b\u7ebf\uff0c\u7531\u63a5\u6536\u5668\u53d1\u9001\u4e00\u4e2aACK(\u628a\u6570\u636e\u603b\u7ebf\u7684\u7535\u5e73\u62c9\u4f4e)\u6765\u8868\u793a\u6570\u636e\u6210\u529f\u63a5\u6536\u3002
\n 6. \u65e0\u5e94\u7b54\u4fe1\u53f7NACK
\n \u5728\u65f6\u949f\u7684\u7b2c9\u4e2a\u8109\u51b2\u671f\u95f4\u53d1\u9001\u5668\u91ca\u653e\u6570\u636e\u603b\u7ebf\uff0c\u63a5\u6536\u5668\u4e0d\u62c9\u4f4e\u6570\u636e\u603b\u7ebf\u8868\u793a\u4e00\u4e2aNACK\uff0cNACK\u6709\u4e24\u79cd\u7528\u9014:
\n a. \u4e00\u822c\u8868\u793a\u63a5\u6536\u5668\u672a\u6210\u529f\u63a5\u6536\u6570\u636e\u5b57\u8282\uff1b
\n b. \u5f53\u63a5\u6536\u5668\u662f\u4e3b\u63a7\u5668\u65f6\uff0c\u5b83\u6536\u5230\u6700\u540e\u4e00\u4e2a\u5b57\u8282\u540e\uff0c\u5e94\u53d1\u9001\u4e00\u4e2aNACK\u4fe1\u53f7\uff0c\u4ee5\u901a\u77e5\u88ab\u63a7\u53d1\u9001\u5668\u7ed3\u675f\u6570\u636e\u53d1\u9001\uff0c\u5e76\u91ca\u653e\u603b\u7ebf\uff0c\u4ee5\u4fbf\u4e3b\u63a7\u63a5\u6536\u5668\u53d1\u9001\u4e00\u4e2a\u505c\u6b62\u4fe1\u53f7STOP\u3002<\/p>\n

\u4e94. \u5bfb\u5740\u7ea6\u5b9a
\n \u5730\u5740\u7684\u5206\u914d\u65b9\u6cd5\u6709\u4e24\u79cd:
\n 1. \u542bCPU\u7684\u667a\u80fd\u5668\u4ef6\uff0c\u5730\u5740\u7531\u8f6f\u4ef6\u521d\u59cb\u5316\u65f6\u5b9a\u4e49\uff0c\u4f46\u4e0d\u80fd\u4e0e\u5176\u5b83\u7684\u5668\u4ef6\u6709\u51b2\u7a81\uff1b
\n 2. \u4e0d\u542bCPU\u7684\u975e\u667a\u80fd\u5668\u4ef6\uff0c\u7531\u5382\u5bb6\u5728\u5668\u4ef6\u5185\u90e8\u56fa\u5316\uff0c\u4e0d\u53ef\u6539\u53d8\u3002<\/p>\n

\u9ad87\u4f4d\u4e3a\u5730\u5740\u7801\uff0c\u5176\u5206\u4e3a\u4e24\u90e8\u5206:
\n 1. \u9ad84\u4f4d\u5c5e\u4e8e\u56fa\u5b9a\u5730\u5740\u4e0d\u53ef\u6539\u53d8\uff0c\u7531\u5382\u5bb6\u56fa\u5316\u7684\u7edf\u4e00\u5730\u5740\uff1b
\n 2. \u4f4e\u4e09\u4f4d\u4e3a\u5f15\u811a\u8bbe\u5b9a\u5730\u5740\uff0c\u53ef\u4ee5\u7531\u5916\u90e8\u5f15\u811a\u6765\u8bbe\u5b9a(\u5e76\u975e\u6240\u6709\u5668\u4ef6\u90fd\u53ef\u4ee5\u8bbe\u5b9a)\uff1b<\/p>\n

<\/p>\n

#define uchar unsigned char
\nuchar mid;<\/p>\n

#define SCL 0x01 \/\/ IIC clock
\n#define SDA 0x02 \/\/ IIC data
\n#define true 1
\n#define false 0
\n\/*===================================================================
\n\/\/ \u51fd\u6570\u529f\u80fd\uff1a \u6a21\u62dfI2C\u63a5\u53e3\u521d\u59cb\u5316\u51fd\u6570
\n\/\/ \u5f62\u53c2\uff1a void
\n\/\/ \u8fd4\u56de\uff1a void
\n\/\/ \u7f16\u5199\uff1a 2004\/6\/27
\n\/\/ \u5907\u6ce8\uff1a \u653e\u4e8e\u7aef\u53e3\u521d\u59cb\u5316\u4e4b\u540e\u8c03\u7528
\n===================================================================*\/
\nvoid Lib_I2C_Ini(void)
\n{
\nDDRC |= SCL;
\nDDRC |= SDA;
\nPORTC |= SCL;
\nPORTC |= SDA;
\n}<\/p>\n

\/*===================================================================
\n\/\/ \u51fd\u6570\u529f\u80fd\uff1a \u6a21\u62dfI2C\u63a5\u53e3\u5ef6\u65f6\u51fd\u6570
\n\/\/ \u5f62\u53c2\uff1a void
\n\/\/ \u8fd4\u56de\uff1a void
\n\/\/ \u7f16\u5199\uff1a 2004\/6\/27
\n\/\/ \u5907\u6ce8\uff1a \u7ea6\u5ef6\u65f67us\uff0c\u8fd9\u6837\uff0cI2C\u901f\u5ea6\u5927\u7ea6\u4e3a100kHz
\n===================================================================*\/
\nvoid Lib_I2C_Delay(void)
\n{
\nunsigned char tmp;
\nfor(tmp = 0; tmp < 200; tmp++)\n_NOP();\n}\n\n\/*===================================================================\n\/\/ \u51fd\u6570\u529f\u80fd\uff1a \u6a21\u62dfI2C\u63a5\u53e3\u542f\u52a8\n\/\/ \u5f62\u53c2\uff1a void\n\/\/ \u8fd4\u56de\uff1a void\n\/\/ \u7f16\u5199\uff1a 2004\/6\/27\n\/\/ \u5907\u6ce8\uff1a \u5728SCL\u4e3a\u9ad8\u65f6\u95f4\u5185\u53d8\u5316SDA\u7531\u9ad8\u5230\u4f4e\u5373\u4e3a\u603b\u7ebf\u542f\u52a8\n===================================================================*\/\nvoid Lib_I2C_Start(void)\n{\nDDRC |= SDA;\nPORTC |= SCL;\nPORTC |= SDA;\nLib_I2C_Delay(); \/\/ START condition setup time\nPORTC &= ~SDA;\nLib_I2C_Delay(); \/\/ START condition hold time\n}\n\n\/*===================================================================\n\/\/ \u51fd\u6570\u529f\u80fd\uff1a \u6a21\u62dfI2C\u63a5\u53e3\u505c\u6b62\n\/\/ \u5f62\u53c2\uff1a void\n\/\/ \u8fd4\u56de\uff1a void\n\/\/ \u7f16\u5199\uff1a 2004\/6\/27\n\/\/ \u5907\u6ce8\uff1a \u5728SCL\u4e3a\u9ad8\u65f6\u95f4\u5185\u53d8\u5316SDA\u7531\u4f4e\u5230\u9ad8\u5373\u4e3a\u603b\u7ebf\u505c\u6b62\n===================================================================*\/\nvoid Lib_I2C_Stop(void)\n{\nDDRC |= SDA;\nPORTC &= ~SDA;\nPORTC &= ~SCL;\nPORTC |= SCL;\nLib_I2C_Delay(); \/\/ STOP condition setup time\nPORTC |= SDA;\nLib_I2C_Delay(); \/\/ STOP condition hold time\n}\n\nvoid Lib_I2C_CLK(void)\n{\nPORTC |= SCL;\nLib_I2C_Delay();\nPORTC &= ~SCL;\n}\n\n\/*===================================================================\n\/\/ \u51fd\u6570\u529f\u80fd\uff1a \u6a21\u62dfI2C\u63a5\u53e3\u63a5\u6536\u4e00\u4e2aACK\n\/\/ \u5f62\u53c2\uff1a void\n\/\/ \u8fd4\u56de\uff1a unsigned char \u6536\u5230\u7684\u56de\u590d\n\/\/ \u7f16\u5199\uff1a 2004\/6\/27\n===================================================================*\/\nunsigned char Lib_I2C_ACK(void)\n{\nPORTC &= ~SCL;\nDDRC &= ~SDA;\nPORTC |= SCL; \/\/ Clock the ACK bit\nLib_I2C_Delay();\nif((SDA & PINC) == SDA) \/\/ Check the ACK bit\n{\nPORTC &= ~SCL;\nreturn true;\n}\nelse\n{\nPORTC &= ~SCL;\nreturn false;\n}\n}\n\n\/*===================================================================\n\/\/ \u51fd\u6570\u529f\u80fd\uff1a \u6a21\u62dfI2C\u63a5\u53e3\u9001\u51fa\u4e00\u4e2a\u6570\u636e\n\/\/ \u5f62\u53c2\uff1a data \u8981\u9001\u51fa\u7684\u6570\u636e\n\/\/ \u8fd4\u56de\uff1a void\n\/\/ \u7f16\u5199\uff1a 2004\/6\/27\n\/\/ \u5907\u6ce8\uff1a SCL\u7684\u4e0b\u964d\u6cbf\u8bfb\u6570\n===================================================================*\/\nunsigned char Lib_I2C_Send(unsigned char data)\n{\nunsigned char i;\nDDRC |= SDA;\nPORTC &= ~SCL;\nfor(i = 0; i < 8; i++)\n{\nif((data & 0x80) == 0x80)\nPORTC |= SDA;\nelse\nPORTC &= ~SDA;\nLib_I2C_CLK();\ndata <<= 1;\n}\n\/\/ if(!Lib_I2C_ACK()) \/\/ no ack\n\/\/ return false;\n\/\/ else\n\/\/ return true;\nwhile(Lib_I2C_ACK());\nreturn true;\n}\n\n\/*===================================================================\n\/\/ \u51fd\u6570\u529f\u80fd\uff1a \u6a21\u62dfI2C\u63a5\u53e3\u63a5\u6536\u4e00\u4e2a\u5b57\u8282\u6570\u636e\n\/\/ \u5f62\u53c2\uff1a void\n\/\/ \u8fd4\u56de\uff1a unsigned char \u63a5\u6536\u5230\u7684\u6570\u636e\n\/\/ \u7f16\u5199\uff1a 2004\/6\/27\n===================================================================*\/\nunsigned char Lib_I2C_Rcv(void)\n{\nunsigned char i;\nunsigned char indata;\nDDRC &= ~SDA;\nfor(i = 0; i < 8; i++)\n{\nindata <<= 1;\nif(SDA & PINC) \/\/ receive logic 1\nindata ++;\nLib_I2C_CLK();\n}\nLib_I2C_CLK();\nreturn indata;\n}\n\n\/\/***********************************\u521d\u59cb\u5316M16\u786c\u4ef6**********8\nvoid port_init(void)\n{\nPORTA = 0x00;\nDDRA = 0xff;\nPORTB = 0x00;\nDDRB = 0xff;\nPORTC = 0x00; \/\/m103 output only\nDDRC = 0xff;\nPORTD = 0x00;\nDDRD = 0xff;\n}\n\nvoid Send_NByte(unsigned int Rom_add,unsigned int Adata)\/\/********************************\u591a\u5b57\u8282\u6570\u636e\u7684\u53d1\u9001\n{\nLib_I2C_Start();\nLib_I2C_Send(0xa0);\/\/24C02\u7684\u7269\u7406\u5730\u5740\nLib_I2C_Send(Rom_add);\/\/\u6570\u636e\u5b58\u50a8\u5730\u5740\nLib_I2C_Send(Adata);\/\/\u60f3\u8981\u5b58\u50a8\u7684\u6570\u636e\nLib_I2C_Stop();\ndelay_nms(10);\n}\n\nvoid Receive_NByte(unsigned int addr)\/\/********************\u591a\u5b57\u8282\u63a5\u6536\n{\nLib_I2C_Start();\nLib_I2C_Send(0xa0);\nLib_I2C_Send(addr>>8);
\nLib_I2C_Send(addr);
\nLib_I2C_Start();
\nLib_I2C_Send(0xa1);
\nmid=Lib_I2C_Rcv();
\nif (Lib_I2C_ACK())
\ndelay_nus(10);
\nelse
\nLib_I2C_Stop();
\n}<\/p>\n

void main(void)
\n{
\nunsigned char temp=0;
\nport_init();
\nuart_init();
\nSend_NByte(0x00aa,0x5a);
\ndelay_nms(1000);
\nReceive_NByte(0x00aa);
\nwhile(1)
\n{
\nReceive_NByte(0x00aa);
\nPORTB=mid;
\nPORTB=0xff;
\ndelay_nms(500);
\n}
\n}
\n<\/code><\/p>\n","protected":false},"excerpt":{"rendered":"

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