{"id":513,"date":"2017-02-08T23:41:02","date_gmt":"2017-02-08T15:41:02","guid":{"rendered":"http:\/\/192.168.1.20\/?p=513"},"modified":"2017-02-08T23:41:02","modified_gmt":"2017-02-08T15:41:02","slug":"{d4daabd1ba368d9860c36387ddb72bbda14f8f9559d69d60a952800885260c03}ef{d4daabd1ba368d9860c36387ddb72bbda14f8f9559d69d60a952800885260c03}bc{47dd41ec6bdcbd9a214c783a3735392b82ea6d1d918378c5a53e0640702d813","status":"publish","type":"post","link":"http:\/\/alextop.top\/?p=513","title":{"rendered":"\uff08\u8f6c\uff09\u7528c\u5199\u7684DHT11\u6e29\u6e7f\u5ea6\u4f20\u611f\u5668"},"content":{"rendered":"

\n\u00a0<\/p>\n

\u672c\u6765\u60f3\u627e\u4e2a<\/span>I2C<\/span>\u63a5\u53e3\u7684\u6e29\u5ea6\u4f20\u611f\u5668<\/span>(<\/span>\u6bd4\u5982<\/span>MAX1668)<\/span>\u73a9\u73a9\uff0c\u7ed3\u679c\u8981\u4e48\u53d1\u73b0\u4ef7\u683c\u6709\u70b9\u5c0f\u8d35\uff0c\u8981\u4e48\u662f\u8718\u86db\u811a\uff0c\u4e0d\u597d\u505a\u5b9e\u9a8c\u3002\u6700\u540e\uff0c\u91c7\u7528\u4e86<\/span>Arduiro DHT11<\/span>\u7535\u5b50\u79ef\u6728\uff0c\u5341\u5206\u7b80\u5355\u65b9\u4fbf\u3002\u7535\u8def\u539f\u7406\u56fe\u5982\u4e0b\u6240\u793a\uff0c<\/span>
\n\t\t\t<\/span><\/span><\/p>\n

\"\"\/\u00a0\u00a0\u00a0\u00a0\u00a0\"\"\/
\n\t\t<\/span><\/p>\n

\u4e3a\u4e86\u548c<\/span>Adafruit<\/span>\u7684\u4f8b\u5b50\u4fdd\u6301\u4e00\u81f4\uff0c\u91c7\u7528\u4e86\u540c\u6837\u7684\u7535\u8def\u56fe\u63a5\u6cd5\u3002<\/span>
\n\t\t\t<\/span><\/span><\/p>\n

\u5f15\u811a<\/span>1<\/span>\u63a5\u5728<\/span>3.3V<\/span>\u7535\u6e90\u4e0a\uff0c\u5f15\u811a<\/span>3<\/span>\u60ac\u7a7a\uff0c\u5f15\u811a<\/span>4<\/span>\u63a5\u5730\u3002<\/span><\/strong>
\n\t\t\t<\/span><\/span><\/p>\n

\u5f15\u811a<\/span>2<\/span>\u63a5\u5728\u9762\u5305\u677f\u7684<\/span>P7 (<\/span>\u4e5f\u5c31\u662f\u6811\u8393\u6d3e\u7684<\/span>PIN #7<\/span>\uff0c<\/span>BCM<\/span>\u7684<\/span>GPIO #4)<\/span>\u3002\u6ce8\u610f\uff0c\u8fd9\u91cc\u9700\u8981\u4e00\u4e2a\u5927\u5c0f<\/span>5.1K<\/span>\u7684\u4e0a\u62c9\u7535\u963b\u3002<\/span><\/strong>
\n\t\t\t<\/span><\/span><\/p>\n

\"\"\/
\n\t\t<\/span><\/p>\n

\"\"\/
\n\t\t<\/span><\/p>\n

\"\"\/\u00a0\u00a0\u00a0\u00a0\"\"\/
\n\t\t<\/span><\/p>\n


\n\t\t<\/span><\/p>\n

\n\u00a0<\/p>\n

\u597d\u4e86\uff0c\u4e0b\u9762\u662f\u6211\u7684\u9762\u5305\u677f\u5b9e\u9a8c\u56fe\uff0c\u7b2c\u4e00\u6b21\u5c45\u7136\u5fd8\u4e86\u63d2\u6570\u636e\u7ebf\uff0c\u6240\u4ee5\u6ca1\u6709\u8bfb\u51fa\u6570\u636e\uff0c\u7b2c\u4e8c\u6b21\u63d2\u4e0a\u6570\u636e\u7ebf\u5c31\u4e00\u5207\u6b63\u5e38\u4e86\u3002<\/span>
\n\t\t\t<\/span><\/span><\/p>\n

\u4f46\u662f\uff0c\u6211\u53d1\u73b0\u8bfb\u5230\u7684\u6570\u636e\u9519\u8bef\u7387\u5f88\u9ad8\uff0c\u4e0d\u77e5\u9053\u662f\u7535\u963b\u7684\u95ee\u9898\u8fd8\u662f\u7a0b\u5e8f\u7684<\/span>“<\/span>\u5ef6\u65f6\u4e0d\u7cbe\u786e<\/span>“<\/span>\u5bfc\u81f4\u7684\u3002<\/span>
\n\t\t\t<\/span><\/span><\/p>\n

\u5982\u679c\u7528\u5b9a\u65f6\u5668\u6765\u5b9e\u73b0\u5ef6\u65f6\uff0c\u5e94\u8be5\u4f1a\u6bd4\u8f83\u597d\uff0c\u4ee5\u540e\u518d\u6574\u5427\uff01<\/span>
\n\t\t\t<\/span><\/span><\/p>\n

$ sudo .\/dht11<\/span>
Temp = 18 *C, Hum = 40 {d4daabd1ba368d9860c36387ddb72bbda14f8f9559d69d60a952800885260c03}
Temp = 18 *C, Hum = 41 {d4daabd1ba368d9860c36387ddb72bbda14f8f9559d69d60a952800885260c03}
Temp = 18 *C, Hum = 40 {d4daabd1ba368d9860c36387ddb72bbda14f8f9559d69d60a952800885260c03}
Temp = 18 *C, Hum = 40 {d4daabd1ba368d9860c36387ddb72bbda14f8f9559d69d60a952800885260c03}
Temp = 18 *C, Hum = 40 {d4daabd1ba368d9860c36387ddb72bbda14f8f9559d69d60a952800885260c03}
Temp = 18 *C, Hum = 40 {d4daabd1ba368d9860c36387ddb72bbda14f8f9559d69d60a952800885260c03}
Temp = 18 *C, Hum = 40 {d4daabd1ba368d9860c36387ddb72bbda14f8f9559d69d60a952800885260c03}
Temp = 18 *C, Hum = 40 {d4daabd1ba368d9860c36387ddb72bbda14f8f9559d69d60a952800885260c03}
Temp = 18 *C, Hum = 40 {d4daabd1ba368d9860c36387ddb72bbda14f8f9559d69d60a952800885260c03}
Temp = 18 *C, Hum = 40 {d4daabd1ba368d9860c36387ddb72bbda14f8f9559d69d60a952800885260c03}<\/span><\/span>
\n\t\t\t<\/span><\/span><\/p>\n

\"\"\/
\n\t\t<\/span><\/p>\n

[cpp]<\/strong>\u00a0view plain<\/span><\/a>\u00a0copy<\/span><\/a>
\n\t\t<\/span><\/p>\n

\u00a0\"\"<\/a>\"\"\/\"\"\/
\n\t\t<\/span><\/p>\n

    \n
  1. \n
    #include\u00a0<stdio.h>\u00a0\u00a0
    \n\t\t\t\t\t\t<\/span><\/span><\/span><\/div>\n<\/li>\n
  2. \n
    #include\u00a0<string.h>\u00a0\u00a0
    \n\t\t\t\t\t\t<\/span><\/span><\/span><\/div>\n<\/li>\n
  3. \n
    #include\u00a0<stdlib.h>\u00a0\u00a0
    \n\t\t\t\t\t\t<\/span><\/span><\/span><\/div>\n<\/li>\n
  4. \n
    #include\u00a0<dirent.h>\u00a0\u00a0
    \n\t\t\t\t\t\t<\/span><\/span><\/span><\/div>\n<\/li>\n
  5. \n
    #include\u00a0<fcntl.h>\u00a0\u00a0
    \n\t\t\t\t\t\t<\/span><\/span><\/span><\/div>\n<\/li>\n
  6. \n
    #include\u00a0<assert.h>\u00a0\u00a0
    \n\t\t\t\t\t\t<\/span><\/span><\/span><\/div>\n<\/li>\n
  7. \n
    #include\u00a0<unistd.h>\u00a0\u00a0
    \n\t\t\t\t\t\t<\/span><\/span><\/span><\/div>\n<\/li>\n
  8. \n
    #include\u00a0<sys\/mman.h>\u00a0\u00a0
    \n\t\t\t\t\t\t<\/span><\/span><\/span><\/div>\n<\/li>\n
  9. \n
    #include\u00a0<sys\/types.h>\u00a0\u00a0
    \n\t\t\t\t\t\t<\/span><\/span><\/span><\/div>\n<\/li>\n
  10. \n
    #include\u00a0<sys\/stat.h>\u00a0\u00a0
    \n\t\t\t\t\t\t<\/span><\/span><\/span><\/div>\n<\/li>\n
  11. \n
    #include\u00a0<sys\/time.h>\u00a0\u00a0
    \n\t\t\t\t\t\t<\/span><\/span><\/span><\/div>\n<\/li>\n
  12. \n
    #include\u00a0<unistd.h>\u00a0\u00a0
    \n\t\t\t\t\t\t<\/span><\/span><\/span><\/div>\n<\/li>\n
  13. \n
    #include\u00a0<bcm2835.h>\u00a0\u00a0
    \n\t\t\t\t\t\t<\/span><\/span><\/span><\/div>\n<\/li>\n
  14. \n
    \u00a0\u00a0
    \n\u00a0<\/div>\n<\/li>\n
  15. \n
    #define\u00a0DHT11_DATA\u00a0RPI_V2_GPIO_P1_07\u00a0\u00a0\u00a0\/\/\u00a0RPi\u00a0Pin\u00a0#7\u00a0\u00a0
    \n\t\t\t\t\t\t<\/span><\/span><\/span><\/div>\n<\/li>\n
  16. \n
    \u00a0\u00a0
    \n\u00a0<\/div>\n<\/li>\n
  17. \n
    int<\/strong>\u00a0readDHT(int<\/strong>\u00a0pin,\u00a0unsigned\u00a0int<\/strong>\u00a0*data)\u00a0\u00a0
    \n\t\t\t\t\t\t\t\t\t\t<\/span><\/span><\/span><\/span><\/span><\/span><\/span><\/div>\n<\/li>\n
  18. \n
    {\u00a0\u00a0
    \n\t\t\t\t\t<\/span><\/span><\/div>\n<\/li>\n
  19. \n
    \u00a0\u00a0\u00a0\u00a0int<\/strong>\u00a0i\u00a0=\u00a00,\u00a0j\u00a0=\u00a00;\u00a0\u00a0
    \n\t\t\t\t\t\t\t<\/span><\/span><\/span><\/span><\/div>\n<\/li>\n
  20. \n
    \u00a0\u00a0\u00a0\u00a0int<\/strong>\u00a0counter\u00a0=\u00a00;\u00a0\u00a0
    \n\t\t\t\t\t\t\t<\/span><\/span><\/span><\/span><\/div>\n<\/li>\n
  21. \n
    \u00a0\u00a0\u00a0\u00a0int<\/strong>\u00a0laststate\u00a0=\u00a0HIGH;\u00a0\u00a0
    \n\t\t\t\t\t\t\t<\/span><\/span><\/span><\/span><\/div>\n<\/li>\n
  22. \n
    \u00a0\u00a0
    \n\u00a0<\/div>\n<\/li>\n
  23. \n
    \u00a0\u00a0\u00a0\u00a0\/\/\u00a0Set\u00a0GPIO\u00a0pin\u00a0to\u00a0output\u00a0\u00a0
    \n\t\t\t\t\t\t\t<\/span><\/span><\/span><\/span><\/div>\n<\/li>\n
  24. \n
    \u00a0\u00a0\u00a0\u00a0bcm2835_gpio_fsel(pin,\u00a0BCM2835_GPIO_FSEL_OUTP);\u00a0\u00a0
    \n\t\t\t\t\t<\/span><\/span><\/div>\n<\/li>\n
  25. \n
    \u00a0\u00a0
    \n\u00a0<\/div>\n<\/li>\n
  26. \n
    \u00a0\u00a0\u00a0\u00a0bcm2835_gpio_write(pin,\u00a0HIGH);\u00a0\u00a0
    \n\t\t\t\t\t<\/span><\/span><\/div>\n<\/li>\n
  27. \n
    \u00a0\u00a0\u00a0\u00a0usleep(500000);\u00a0\/\/\u00a0500ms\u00a0\u00a0
    \n\t\t\t\t\t\t\t<\/span><\/span><\/span><\/span><\/div>\n<\/li>\n
  28. \n
    \u00a0\u00a0\u00a0\u00a0bcm2835_gpio_write(pin,\u00a0LOW);\u00a0\u00a0
    \n\t\t\t\t\t<\/span><\/span><\/div>\n<\/li>\n
  29. \n
    \u00a0\u00a0\u00a0\u00a0usleep(20000);\u00a0\u00a0\/\/\u00a020ms\u00a0\u00a0
    \n\t\t\t\t\t\t\t<\/span><\/span><\/span><\/span><\/div>\n<\/li>\n
  30. \n
    \u00a0\u00a0
    \n\u00a0<\/div>\n<\/li>\n
  31. \n
    \u00a0\u00a0\u00a0\u00a0\/\/\u00a0Set\u00a0GPIO\u00a0pin\u00a0to\u00a0input\u00a0\u00a0
    \n\t\t\t\t\t\t\t<\/span><\/span><\/span><\/span><\/div>\n<\/li>\n
  32. \n
    \u00a0\u00a0\u00a0\u00a0bcm2835_gpio_fsel(pin,\u00a0BCM2835_GPIO_FSEL_INPT);\u00a0\u00a0
    \n\t\t\t\t\t<\/span><\/span><\/div>\n<\/li>\n
  33. \n
    \u00a0\u00a0
    \n\u00a0<\/div>\n<\/li>\n
  34. \n
    \u00a0\u00a0\u00a0\u00a0\/\/\u00a0wait\u00a0for\u00a0pin\u00a0to\u00a0drop?\u00a0\u00a0
    \n\t\t\t\t\t\t\t<\/span><\/span><\/span><\/span><\/div>\n<\/li>\n
  35. \n
    \u00a0\u00a0\u00a0\u00a0while<\/strong>\u00a0(bcm2835_gpio_lev(pin)\u00a0==\u00a01)\u00a0{\u00a0\u00a0
    \n\t\t\t\t\t\t\t<\/span><\/span><\/span><\/span><\/div>\n<\/li>\n
  36. \n
    \u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0usleep(1);\u00a0\u00a0
    \n\t\t\t\t\t<\/span><\/span><\/div>\n<\/li>\n
  37. \n
    \u00a0\u00a0\u00a0\u00a0}\u00a0\u00a0
    \n\t\t\t\t\t<\/span><\/span><\/div>\n<\/li>\n
  38. \n
    \u00a0\u00a0
    \n\u00a0<\/div>\n<\/li>\n
  39. \n
    \u00a0\u00a0\u00a0\u00a0\/\/\u00a0reading\u00a0data\u00a0\u00a0
    \n\t\t\t\t\t\t\t<\/span><\/span><\/span><\/span><\/div>\n<\/li>\n
  40. \n
    \u00a0\u00a0\u00a0\u00a0for<\/strong>\u00a0(i\u00a0=\u00a00;\u00a0i\u00a0<\u00a0100;\u00a0i++)\u00a0{\u00a0\u00a0
    \n\t\t\t\t\t\t\t<\/span><\/span><\/span><\/span><\/div>\n<\/li>\n
  41. \n
    \u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0counter\u00a0=\u00a00;\u00a0\u00a0
    \n\t\t\t\t\t<\/span><\/span><\/div>\n<\/li>\n
  42. \n
    \u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0while<\/strong>\u00a0(bcm2835_gpio_lev(pin)\u00a0==\u00a0laststate)\u00a0{\u00a0\u00a0
    \n\t\t\t\t\t\t\t<\/span><\/span><\/span><\/span><\/div>\n<\/li>\n
  43. \n
    \u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0counter++;\u00a0\u00a0
    \n\t\t\t\t\t<\/span><\/span><\/div>\n<\/li>\n
  44. \n
    \u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0if<\/strong>\u00a0(counter\u00a0==\u00a01000)\u00a0\u00a0
    \n\t\t\t\t\t\t\t<\/span><\/span><\/span><\/span><\/div>\n<\/li>\n
  45. \n
    \u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0break<\/strong>;\u00a0\u00a0
    \n\t\t\t\t\t\t\t<\/span><\/span><\/span><\/span><\/div>\n<\/li>\n
  46. \n
    \u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0}\u00a0\u00a0
    \n\t\t\t\t\t<\/span><\/span><\/div>\n<\/li>\n
  47. \n
    \u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0if<\/strong>\u00a0(counter\u00a0==\u00a01000)\u00a0break<\/strong>;\u00a0\u00a0
    \n\t\t\t\t\t\t\t\t\t<\/span><\/span><\/span><\/span><\/span><\/span><\/div>\n<\/li>\n
  48. \n
    \u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0laststate\u00a0=\u00a0bcm2835_gpio_lev(pin);\u00a0\u00a0
    \n\t\t\t\t\t<\/span><\/span><\/div>\n<\/li>\n
  49. \n
    \u00a0\u00a0
    \n\u00a0<\/div>\n<\/li>\n
  50. \n
    \u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\/\/\u00a0shove\u00a0each\u00a0bit\u00a0into\u00a0the\u00a0storage\u00a0bytes\u00a0\u00a0
    \n\t\t\t\t\t\t\t<\/span><\/span><\/span><\/span><\/div>\n<\/li>\n
  51. \n
    \u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0if<\/strong>\u00a0((i\u00a0>\u00a03)\u00a0&&\u00a0(i\u00a0{d4daabd1ba368d9860c36387ddb72bbda14f8f9559d69d60a952800885260c03}\u00a02\u00a0==\u00a00))\u00a0{\u00a0\u00a0
    \n\t\t\t\t\t\t\t<\/span><\/span><\/span><\/span><\/div>\n<\/li>\n
  52. \n
    \u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0data[j\u00a0\/\u00a08]\u00a0<<=\u00a01;\u00a0\u00a0
    \n\t\t\t\t\t<\/span><\/span><\/div>\n<\/li>\n
  53. \n
    \u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0if<\/strong>\u00a0(counter\u00a0>\u00a0200)\u00a0\u00a0
    \n\t\t\t\t\t\t\t<\/span><\/span><\/span><\/span><\/div>\n<\/li>\n
  54. \n
    \u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0data[j\u00a0\/\u00a08]\u00a0|=\u00a01;\u00a0\u00a0
    \n\t\t\t\t\t<\/span><\/span><\/div>\n<\/li>\n
  55. \n
    \u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0j++;\u00a0\u00a0
    \n\t\t\t\t\t<\/span><\/span><\/div>\n<\/li>\n
  56. \n
    \u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0}\u00a0\u00a0
    \n\t\t\t\t\t<\/span><\/span><\/div>\n<\/li>\n
  57. \n
    \u00a0\u00a0\u00a0\u00a0}\u00a0\u00a0
    \n\t\t\t\t\t<\/span><\/span><\/div>\n<\/li>\n
  58. \n
    \u00a0\u00a0
    \n\u00a0<\/div>\n<\/li>\n
  59. \n
    \u00a0\u00a0\u00a0\u00a0\/*printf(“DHT11\u00a0Data\u00a0({d4daabd1ba368d9860c36387ddb72bbda14f8f9559d69d60a952800885260c03}d\u00a0bits):\u00a00x{d4daabd1ba368d9860c36387ddb72bbda14f8f9559d69d60a952800885260c03}x\u00a00x{d4daabd1ba368d9860c36387ddb72bbda14f8f9559d69d60a952800885260c03}x\u00a00x{d4daabd1ba368d9860c36387ddb72bbda14f8f9559d69d60a952800885260c03}x\u00a00x{d4daabd1ba368d9860c36387ddb72bbda14f8f9559d69d60a952800885260c03}x\u00a00x{d4daabd1ba368d9860c36387ddb72bbda14f8f9559d69d60a952800885260c03}x\\n”,\u00a0
    \n\t\t\t\t\t\t\t<\/span><\/span><\/span><\/span><\/div>\n<\/li>\n
  60. \n
    \u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0j,\u00a0data[0],\u00a0data[1],\u00a0data[2],\u00a0data[3],\u00a0data[4]);*\/\u00a0\u00a0
    \n\t\t\t\t\t\t<\/span><\/span><\/span><\/div>\n<\/li>\n
  61. \n
    \u00a0\u00a0\u00a0\u00a0if<\/strong>\u00a0(data[4]\u00a0==\u00a0((data[0]\u00a0+\u00a0data[1]\u00a0+\u00a0data[2]\u00a0+\u00a0data[3])\u00a0&\u00a00xFF))\u00a0{\u00a0\u00a0
    \n\t\t\t\t\t\t\t<\/span><\/span><\/span><\/span><\/div>\n<\/li>\n
  62. \n
    \u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0printf(“Temp\u00a0=\u00a0{d4daabd1ba368d9860c36387ddb72bbda14f8f9559d69d60a952800885260c03}d\u00a0*C,\u00a0Hum\u00a0=\u00a0{d4daabd1ba368d9860c36387ddb72bbda14f8f9559d69d60a952800885260c03}d\u00a0\\{d4daabd1ba368d9860c36387ddb72bbda14f8f9559d69d60a952800885260c03}\\n”,\u00a0data[2],\u00a0data[0]);\u00a0\u00a0
    \n\t\t\t\t\t\t\t<\/span><\/span><\/span><\/span><\/div>\n<\/li>\n
  63. \n
    \u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0return<\/strong>\u00a01;\u00a0\u00a0
    \n\t\t\t\t\t\t\t<\/span><\/span><\/span><\/span><\/div>\n<\/li>\n
  64. \n
    \u00a0\u00a0\u00a0\u00a0}\u00a0\u00a0
    \n\t\t\t\t\t<\/span><\/span><\/div>\n<\/li>\n
  65. \n
    \u00a0\u00a0
    \n\u00a0<\/div>\n<\/li>\n
  66. \n
    \u00a0\u00a0\u00a0\u00a0return<\/strong>\u00a00;\u00a0\u00a0
    \n\t\t\t\t\t\t\t<\/span><\/span><\/span><\/span><\/div>\n<\/li>\n
  67. \n
    }\u00a0\u00a0
    \n\t\t\t\t\t<\/span><\/span><\/div>\n<\/li>\n
  68. \n
    \u00a0\u00a0
    \n\u00a0<\/div>\n<\/li>\n
  69. \n
    int<\/strong>\u00a0main(int<\/strong>\u00a0argc,\u00a0char<\/strong>\u00a0**argv)\u00a0\u00a0
    \n\t\t\t\t\t\t\t\t\t\t<\/span><\/span><\/span><\/span><\/span><\/span><\/span><\/div>\n<\/li>\n
  70. \n
    {\u00a0\u00a0
    \n\t\t\t\t\t<\/span><\/span><\/div>\n<\/li>\n
  71. \n
    \u00a0\u00a0\u00a0\u00a0uint8_t\u00a0counter\u00a0=\u00a00;\u00a0\u00a0
    \n\t\t\t\t\t<\/span><\/span><\/div>\n<\/li>\n
  72. \n
    \u00a0\u00a0\u00a0\u00a0uint32_t\u00a0data[100];\u00a0\u00a0
    \n\t\t\t\t\t<\/span><\/span><\/div>\n<\/li>\n
  73. \n
    \u00a0\u00a0
    \n\u00a0<\/div>\n<\/li>\n
  74. \n
    \u00a0\u00a0\u00a0\u00a0if<\/strong>\u00a0(!bcm2835_init())\u00a0\u00a0\u00a0\u00a0
    \n\t\t\t\t\t\t\t<\/span><\/span><\/span><\/span><\/div>\n<\/li>\n
  75. \n
    \u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0return<\/strong>\u00a01;\u00a0\u00a0\u00a0\u00a0
    \n\t\t\t\t\t\t\t<\/span><\/span><\/span><\/span><\/div>\n<\/li>\n
  76. \n
    \u00a0\u00a0
    \n\u00a0<\/div>\n<\/li>\n
  77. \n
    \u00a0\u00a0\u00a0\u00a0while<\/strong>\u00a0(counter\u00a0<\u00a010)\u00a0{\u00a0\u00a0
    \n\t\t\t\t\t\t\t<\/span><\/span><\/span><\/span><\/div>\n<\/li>\n
  78. \n
    \u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0memset(data,\u00a00,\u00a0100\u00a0*\u00a0sizeof<\/strong>(uint32_t));\u00a0\u00a0
    \n\t\t\t\t\t\t\t<\/span><\/span><\/span><\/span><\/div>\n<\/li>\n
  79. \n
    \u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0if<\/strong>\u00a0(readDHT(DHT11_DATA,\u00a0data))\u00a0\u00a0
    \n\t\t\t\t\t\t\t<\/span><\/span><\/span><\/span><\/div>\n<\/li>\n
  80. \n
    \u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0counter++;\u00a0\u00a0
    \n\t\t\t\t\t<\/span><\/span><\/div>\n<\/li>\n
  81. \n
    \u00a0\u00a0\u00a0\u00a0}\u00a0\u00a0
    \n\t\t\t\t\t<\/span><\/span><\/div>\n<\/li>\n
  82. \n
    \u00a0\u00a0
    \n\u00a0<\/div>\n<\/li>\n
  83. \n
    \u00a0\u00a0\u00a0\u00a0bcm2835_close();\u00a0\u00a0\u00a0\u00a0
    \n\t\t\t\t\t<\/span><\/span><\/div>\n<\/li>\n
  84. \n
    \u00a0\u00a0\u00a0\u00a0return<\/strong>\u00a00;\u00a0\u00a0\u00a0\u00a0
    \n\t\t\t\t\t\t\t<\/span><\/span><\/span><\/span><\/div>\n<\/li>\n
  85. \n
    }\u00a0\u00a0
    \n\t\t\t\t\t<\/span><\/span><\/div>\n<\/li>\n<\/ol>\n


    <\/span>\u6700\u540e\uff0c\u73a9\u4e2a\u589e\u5f3a\u7248\uff0c\u7528\u68c0\u6d4b\u7684\u6e29\u5ea6\u6765\u63a7\u5236<\/span>LED<\/span>\u3002\u6211\u628a\u7535\u8111\u7684\u51fa\u98ce\u53e3\u653e\u5728\u4f20\u611f\u5668\u65c1\u8fb9\uff0c\u660e\u663e\u770b\u5230\u6e29\u5ea6\u4e0a\u5347\uff0c\u563f\u563f\uff01<\/span>
    \n\t\t\t<\/span><\/span><\/p>\n

    \u4e0a\u56fe\u914d\u4fee\u6539\u540e\u7684\u7a0b\u5e8f\uff0c\u5b8c\u7f8e\u6536\u5b98\uff01<\/span>
    \n\t\t\t<\/span><\/span><\/p>\n

    [cpp]<\/strong>\u00a0view plain<\/span><\/a>\u00a0copy<\/span><\/a>
    \n\t\t<\/span><\/p>\n

    \u00a0\"\"<\/a>\"\"\/\"\"\/
    \n\t\t<\/span><\/p>\n

      \n
    1. \n
      int<\/strong>\u00a0main(int<\/strong>\u00a0argc,\u00a0char<\/strong>\u00a0**argv)\u00a0\u00a0
      \n\t\t\t\t\t\t\t\t\t\t<\/span><\/span><\/span><\/span><\/span><\/span><\/span><\/div>\n<\/li>\n
    2. \n
      {\u00a0\u00a0
      \n\t\t\t\t\t<\/span><\/span><\/div>\n<\/li>\n
    3. \n
      \u00a0\u00a0\u00a0\u00a0uint8_t\u00a0counter\u00a0=\u00a00;\u00a0\u00a0
      \n\t\t\t\t\t<\/span><\/span><\/div>\n<\/li>\n
    4. \n
      \u00a0\u00a0\u00a0\u00a0uint32_t\u00a0data[100];\u00a0\u00a0
      \n\t\t\t\t\t<\/span><\/span><\/div>\n<\/li>\n
    5. \n
      \u00a0\u00a0
      \n\u00a0<\/div>\n<\/li>\n
    6. \n
      \u00a0\u00a0\u00a0\u00a0if<\/strong>\u00a0(!bcm2835_init())\u00a0\u00a0\u00a0\u00a0
      \n\t\t\t\t\t\t\t<\/span><\/span><\/span><\/span><\/div>\n<\/li>\n
    7. \n
      \u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0return<\/strong>\u00a01;\u00a0\u00a0\u00a0\u00a0
      \n\t\t\t\t\t\t\t<\/span><\/span><\/span><\/span><\/div>\n<\/li>\n
    8. \n
      \u00a0\u00a0
      \n\u00a0<\/div>\n<\/li>\n
    9. \n
      \u00a0\u00a0\u00a0\u00a0\/\/\u00a0Set\u00a0the\u00a0pin\u00a0to\u00a0be\u00a0an\u00a0output\u00a0\u00a0
      \n\t\t\t\t\t\t\t<\/span><\/span><\/span><\/span><\/div>\n<\/li>\n
    10. \n
      \u00a0\u00a0\u00a0\u00a0bcm2835_gpio_fsel(LED,\u00a0BCM2835_GPIO_FSEL_OUTP);\u00a0\u00a0\u00a0\u00a0
      \n\t\t\t\t\t<\/span><\/span><\/div>\n<\/li>\n
    11. \n
      \u00a0\u00a0
      \n\u00a0<\/div>\n<\/li>\n
    12. \n
      \u00a0\u00a0\u00a0\u00a0while<\/strong>\u00a0(counter\u00a0<\u00a010)\u00a0{\u00a0\u00a0
      \n\t\t\t\t\t\t\t<\/span><\/span><\/span><\/span><\/div>\n<\/li>\n
    13. \n
      \u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0memset(data,\u00a00,\u00a0100\u00a0*\u00a0sizeof<\/strong>(uint32_t));\u00a0\u00a0
      \n\t\t\t\t\t\t\t<\/span><\/span><\/span><\/span><\/div>\n<\/li>\n
    14. \n
      \u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0if<\/strong>\u00a0(readDHT(DHT11_DATA,\u00a0data))\u00a0{\u00a0\u00a0
      \n\t\t\t\t\t\t\t<\/span><\/span><\/span><\/span><\/div>\n<\/li>\n
    15. \n
      \u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0counter++;\u00a0\u00a0
      \n\t\t\t\t\t<\/span><\/span><\/div>\n<\/li>\n
    16. \n
      \u00a0\u00a0
      \n\u00a0<\/div>\n<\/li>\n
    17. \n
      \u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0if<\/strong>\u00a0(data[2]\u00a0!=\u00a018)\u00a0{\u00a0\u00a0
      \n\t\t\t\t\t\t\t<\/span><\/span><\/span><\/span><\/div>\n<\/li>\n
    18. \n
      \u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0bcm2835_gpio_write(LED,\u00a0HIGH);\u00a0\u00a0
      \n\t\t\t\t\t<\/span><\/span><\/div>\n<\/li>\n
    19. \n
      \u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0}\u00a0else<\/strong>\u00a0{\u00a0\u00a0
      \n\t\t\t\t\t\t\t<\/span><\/span><\/span><\/span><\/div>\n<\/li>\n
    20. \n
      \u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0bcm2835_gpio_write(LED,\u00a0LOW);\u00a0\u00a0
      \n\t\t\t\t\t<\/span><\/span><\/div>\n<\/li>\n
    21. \n
      \u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0}\u00a0\u00a0
      \n\t\t\t\t\t<\/span><\/span><\/div>\n<\/li>\n
    22. \n
      \u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0}\u00a0\u00a0
      \n\t\t\t\t\t<\/span><\/span><\/div>\n<\/li>\n
    23. \n
      \u00a0\u00a0
      \n\u00a0<\/div>\n<\/li>\n
    24. \n
      \u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0bcm2835_delay(1000);\u00a0\u00a0
      \n\t\t\t\t\t<\/span><\/span><\/div>\n<\/li>\n
    25. \n
      \u00a0\u00a0\u00a0\u00a0}\u00a0\u00a0
      \n\t\t\t\t\t<\/span><\/span><\/div>\n<\/li>\n
    26. \n
      \u00a0\u00a0
      \n\u00a0<\/div>\n<\/li>\n
    27. \n
      \u00a0\u00a0\u00a0\u00a0bcm2835_close();\u00a0\u00a0\u00a0\u00a0
      \n\t\t\t\t\t<\/span><\/span><\/div>\n<\/li>\n
    28. \n
      \u00a0\u00a0\u00a0\u00a0return<\/strong>\u00a00;\u00a0\u00a0\u00a0\u00a0
      \n\t\t\t\t\t\t\t<\/span><\/span><\/span><\/span><\/div>\n<\/li>\n
    29. \n
      }\u00a0\u00a0
      \n\t\t\t\t\t<\/span><\/span><\/div>\n<\/li>\n<\/ol>\n


      \n\t\t<\/span><\/p>\n

      \n\u00a0<\/p>\n

      \u53c2\u8003\u8d44\u6599<\/span>
      \n\t\t\t<\/span><\/span><\/p>\n

      1.\u00a0DHT Humidity Sensing on Raspberry Pi or Beaglebone Black with GDocs Logging<\/span><\/a>
      \n\t\t<\/span><\/p>\n

      2.\u00a0<\/span>\u6811\u8393\u6d3e\u52a8\u624b\u5b9e\u9a8c<\/span>-2.<\/span>\u6e29\u6e7f\u5ea6\u4f20\u611f\u5668<\/span>DHT11<\/span>\u5b9e\u9a8c<\/span>
      \n\t\t\t\t<\/span><\/span><\/span><\/p>\n","protected":false},"excerpt":{"rendered":"

      \u00a0 \u672c\u6765\u60f3\u627e\u4e2aI2C\u63a5\u53e3\u7684\u6e29\u5ea6…<\/p>\n","protected":false},"author":1,"featured_media":0,"comment_status":"open","ping_status":"open","sticky":false,"template":"","format":"standard","meta":{"footnotes":""},"categories":[15],"tags":[],"class_list":["post-513","post","type-post","status-publish","format-standard","hentry","category-reapberry"],"_links":{"self":[{"href":"http:\/\/alextop.top\/index.php?rest_route=\/wp\/v2\/posts\/513"}],"collection":[{"href":"http:\/\/alextop.top\/index.php?rest_route=\/wp\/v2\/posts"}],"about":[{"href":"http:\/\/alextop.top\/index.php?rest_route=\/wp\/v2\/types\/post"}],"author":[{"embeddable":true,"href":"http:\/\/alextop.top\/index.php?rest_route=\/wp\/v2\/users\/1"}],"replies":[{"embeddable":true,"href":"http:\/\/alextop.top\/index.php?rest_route=%2Fwp%2Fv2%2Fcomments&post=513"}],"version-history":[{"count":0,"href":"http:\/\/alextop.top\/index.php?rest_route=\/wp\/v2\/posts\/513\/revisions"}],"wp:attachment":[{"href":"http:\/\/alextop.top\/index.php?rest_route=%2Fwp%2Fv2%2Fmedia&parent=513"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"http:\/\/alextop.top\/index.php?rest_route=%2Fwp%2Fv2%2Fcategories&post=513"},{"taxonomy":"post_tag","embeddable":true,"href":"http:\/\/alextop.top\/index.php?rest_route=%2Fwp%2Fv2%2Ftags&post=513"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}