1 | #include "Arduino.h"
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2 | #include <Wire.h>
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3 |
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4 | const uint8_t address = 0x68;
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5 |
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6 | uint8_t decToBcd(byte val)
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7 | {
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8 | return ( (val/10*16) + (val%10) );
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9 | }
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10 |
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11 | // Convert binary coded decimal to normal decimal numbers
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12 | uint8_t bcdToDec(byte val)
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13 | {
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14 | return ( (val/16*10) + (val%16) );
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15 | }
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16 |
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17 | void setup()
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18 | {
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19 | Serial5.begin(9600);
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20 | Serial5.println("Wire init");
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21 | Wire.begin();
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22 |
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23 | // Setting the date
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24 | /*
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25 | Wire.beginTransmission(address);
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26 | Wire.write((uint8_t)0x00); // Init register
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27 |
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28 | Wire.write(decToBcd(0)); // Second
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29 | Wire.write(decToBcd(39)); // Minute
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30 | Wire.write(decToBcd(11)); // Hours
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31 |
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32 | Wire.write(decToBcd(4)); // Day of week
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33 |
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34 | Wire.write(decToBcd(21)); // Day of Month
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35 | Wire.write(decToBcd(5)); // Month
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36 | Wire.write(decToBcd(14)); // Year
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37 | Wire.endTransmission();
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38 | */
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39 | }
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40 |
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41 | void loop()
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42 | {
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43 |
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44 | Wire.beginTransmission(address);
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45 | Wire.write((uint8_t)0x3F);
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46 | Wire.endTransmission();
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47 |
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48 | delay(10);
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49 |
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50 | Wire.requestFrom(address, 7);
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51 | /* while(Wire.available())
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52 | {
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53 | Serial5.print(bcdToDec(Wire.read()));
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54 | Serial5.print(" ");
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55 | }
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56 | Serial5.println();*/
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57 |
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58 |
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59 | int second = bcdToDec(Wire.read() & 0x7f);
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60 | int minute = bcdToDec(Wire.read());
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61 | int hour = bcdToDec(Wire.read() & 0x3f); // Need to change this if 12 hour am/pm
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62 | int dayOfWeek = bcdToDec(Wire.read());
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63 | int dayOfMonth = bcdToDec(Wire.read());
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64 | int month = bcdToDec(Wire.read());
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65 | int year = bcdToDec(Wire.read());
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66 |
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67 | Serial5.print(hour, DEC);
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68 | Serial5.print(":");
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69 | Serial5.print(minute, DEC);
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70 | Serial5.print(":");
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71 | Serial5.print(second, DEC);
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72 | Serial5.print(" ");
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73 | Serial5.print(month, DEC);
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74 | Serial5.print("/");
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75 | Serial5.print(dayOfMonth, DEC);
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76 | Serial5.print("/");
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77 | Serial5.print(year,DEC);
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78 | Serial5.print(" ");
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79 | Serial5.println();
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80 |
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81 | delay(990);
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82 | }
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