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標題: IIC RTC DS1307模塊Arduino源程序 [打印本頁]
作者: 王杰    時間: 2019-8-7 11:17
標題: IIC RTC DS1307模塊Arduino源程序
Arduino源程序如下:
  1. extern "C" {
  2. #include <../Wire/Wire.h>
  3. }
  4. #include "DS1307.h"

  6. DS1307::DS1307()
  7. {
  8.   Wire.begin();
  9. }

  11. DS1307 RTC=DS1307();

  13. // PRIVATE FUNCTIONS

  15. // Aquire data from the RTC chip in BCD format
  16. // refresh the buffer
  17. void DS1307::read(void)
  18. {
  19.   // use the Wire lib to connect to tho rtc
  20.   // reset the resgiter pointer to zero
  21.   Wire.beginTransmission(DS1307_CTRL_ID);
  22.     Wire.send(0x00);
  23.   Wire.endTransmission();

  25.   // request the 7 bytes of data    (secs, min, hr, dow, date. mth, yr)
  26.   Wire.requestFrom(DS1307_CTRL_ID, 7);
  27.   for(int i=0; i<7; i++)
  28.   {
  29.     // store data in raw bcd format
  30.     rtc_bcd[i]=Wire.receive();
  31.   }
  32. }

  34. // update the data on the IC from the bcd formatted data in the buffer
  35. void DS1307::save(void)
  36. {
  37.   Wire.beginTransmission(DS1307_CTRL_ID);
  38.   Wire.send(0x00); // reset register pointer
  39.   for(int i=0; i<7; i++)
  40.   {
  41.     Wire.send(rtc_bcd[i]);
  42.   }
  43.   Wire.endTransmission();
  44. }


  47. // PUBLIC FUNCTIONS
  48. void DS1307::get(int *rtc, boolean refresh)   // Aquire data from buffer and convert to int, refresh buffer if required
  49. {
  50.   if(refresh) read();
  51.   for(int i=0;i<7;i++)  // cycle through each component, create array of data
  52.   {
  53.         rtc[i]=get(i, 0);
  54.   }
  55. }

  57. int DS1307::get(int c, boolean refresh)  // aquire individual RTC item from buffer, return as int, refresh buffer if required
  58. {
  59.   if(refresh) read();
  60.   int v=-1;
  61.   switch(c)
  62.   {
  63.   case DS1307_SEC:
  64.     v=(10*((rtc_bcd[DS1307_SEC] & DS1307_HI_SEC)>>4))+(rtc_bcd[DS1307_SEC] & DS1307_LO_BCD);
  65.         break;
  66.   case DS1307_MIN:
  67.     v=(10*((rtc_bcd[DS1307_MIN] & DS1307_HI_MIN)>>4))+(rtc_bcd[DS1307_MIN] & DS1307_LO_BCD);
  68.         break;
  69.   case DS1307_HR:
  70.     v=(10*((rtc_bcd[DS1307_HR] & DS1307_HI_HR)>>4))+(rtc_bcd[DS1307_HR] & DS1307_LO_BCD);
  71.         break;
  72.   case DS1307_DOW:
  73.     v=rtc_bcd[DS1307_DOW] & DS1307_LO_DOW;
  74.         break;
  75.   case DS1307_DATE:
  76.     v=(10*((rtc_bcd[DS1307_DATE] & DS1307_HI_DATE)>>4))+(rtc_bcd[DS1307_DATE] & DS1307_LO_BCD);
  77.         break;
  78.   case DS1307_MTH:
  79.     v=(10*((rtc_bcd[DS1307_MTH] & DS1307_HI_MTH)>>4))+(rtc_bcd[DS1307_MTH] & DS1307_LO_BCD);
  80.         break;
  81.   case DS1307_YR:
  82.     v=(10*((rtc_bcd[DS1307_YR] & DS1307_HI_YR)>>4))+(rtc_bcd[DS1307_YR] & DS1307_LO_BCD)+DS1307_BASE_YR;
  83.         break;
  84.   } // end switch
  85.   return v;
  86. }

  88. void DS1307::set(int c, int v)  // Update buffer, then update the chip
  89. {
  90.   switch(c)
  91.   {
  92.   case DS1307_SEC:
  93.     if(v<60 && v>-1)
  94.     {
  95.         //preserve existing clock state (running/stopped)
  96.         int state=rtc_bcd[DS1307_SEC] & DS1307_CLOCKHALT;
  97.         rtc_bcd[DS1307_SEC]=state | ((v / 10)<<4) + (v % 10);
  98.     }
  99.     break;
  100.   case DS1307_MIN:
  101.     if(v<60 && v>-1)
  102.     {
  103.         rtc_bcd[DS1307_MIN]=((v / 10)<<4) + (v % 10);
  104.     }
  105.     break;
  106.   case DS1307_HR:
  107.   // TODO : AM/PM  12HR/24HR
  108.     if(v<24 && v>-1)
  109.     {
  110.         rtc_bcd[DS1307_HR]=((v / 10)<<4) + (v % 10);
  111.     }
  112.     break;
  113.   case DS1307_DOW:
  114.     if(v<8 && v>-1)
  115.     {
  116.         rtc_bcd[DS1307_DOW]=v;
  117.     }
  118.     break;
  119.   case DS1307_DATE:
  120.     if(v<31 && v>-1)
  121.     {
  122.         rtc_bcd[DS1307_DATE]=((v / 10)<<4) + (v % 10);
  123.     }
  124.     break;
  125.   case DS1307_MTH:
  126.     if(v<13 && v>-1)
  127.     {
  128.         rtc_bcd[DS1307_MTH]=((v / 10)<<4) + (v % 10);
  129.     }
  130.     break;
  131.   case DS1307_YR:
  132.     if(v<13 && v>-1)
  133.     {
  134.         rtc_bcd[DS1307_YR]=((v / 10)<<4) + (v % 10);
  135.     }
  136.     break;
  137.   } // end switch
  138.   save();
  139. }

  141. void DS1307::stop(void)
  142. {
  143.         // set the ClockHalt bit high to stop the rtc
  144.         // this bit is part of the seconds byte
  145.     rtc_bcd[DS1307_SEC]=rtc_bcd[DS1307_SEC] | DS1307_CLOCKHALT;
  146.     save();
  147. }

  149. void DS1307::start(void)
  150. {
  151.         // unset the ClockHalt bit to start the rtc
  152.         // TODO : preserve existing seconds
  153.     rtc_bcd[DS1307_SEC]=rtc_bcd[DS1307_SEC] & (~DS1307_CLOCKHALT);
  154.         save();
  155. }


  158. void DS1307::SetOutput(int c)  
  159. {
  160.   int out;
  161.   switch(c)
  162.   {
  163.   case HIGH :
  164.         out=DS1307_HIGH_BIT;
  165.   break;
  166.   case LOW :
  167.         out=DS1307_LOW_BIT;
  168.   break;
  169.   case DS1307_SQW1HZ :
  170.         out=DS1307_SQW1HZ_BIT;
  171.   break;
  172.   case DS1307_SQW4KHZ :
  173.         out=DS1307_SQW4KHZ_BIT;
  174.   break;
  175.   case DS1307_SQW8KHZ :
  176.         out=DS1307_SQW8KHZ_BIT;
  177.   break;
  178.   case DS1307_SQW32KHZ :
  179.         out=DS1307_SQW32KHZ_BIT;
  180.   break;
  181.   default:
  182.         out=DS1307_LOW_BIT;
  183.   }
  184.   
  185.   Wire.beginTransmission(DS1307_CTRL_ID);
  186.   Wire.send(0x07);
  187.   Wire.send(out);
  188.   Wire.endTransmission();
  189. }

  191. int DS1307::GetOutput(void)  
  192. {
  193.   Wire.beginTransmission(DS1307_CTRL_ID);
  194.   Wire.send(0x07);
  195.   Wire.endTransmission();

  197.   Wire.requestFrom(DS1307_CTRL_ID, 1);
  198.   int out=Wire.receive();
  199.   
  200.   int c=-1;
  201.   switch(out)
  202.   {
  203.   case DS1307_HIGH_BIT :
  204.         c=HIGH;
  205.   break;
  206.   case DS1307_LOW_BIT :
  207.         c=LOW;
  208.   break;
  209.   case DS1307_SQW1HZ_BIT :
  210.         c=DS1307_SQW1HZ;
  211.   break;
  212.   case DS1307_SQW4KHZ_BIT :
  213.         c=DS1307_SQW4KHZ;
  214.   break;
  215.   case DS1307_SQW8KHZ_BIT :
  216.         c=DS1307_SQW8KHZ;
  217.   break;
  218.   case DS1307_SQW32KHZ_BIT :
  219.         c=DS1307_SQW32KHZ;
  220.   break;
  221.   }
  222.   return c;
  223. }
復制代碼

所有資料51hei提供下載:
【Realplay】 Tiny RTC I2C模塊 24C32存儲器 DS1307時鐘模塊.rar (742.75 KB, 下載次數: 15)






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