DS1307
DS1307.h@0:74b6573c6cca, 2015-11-30 (annotated)
- Committer:
- chinetion
- Date:
- Mon Nov 30 16:19:11 2015 +0000
- Revision:
- 0:74b6573c6cca
aa
Who changed what in which revision?
User | Revision | Line number | New contents of line |
---|---|---|---|
chinetion | 0:74b6573c6cca | 1 | #include "mbed.h" |
chinetion | 0:74b6573c6cca | 2 | #include "DigitDisplay.h" |
chinetion | 0:74b6573c6cca | 3 | #define DS1307_ADDR 0xD0 |
chinetion | 0:74b6573c6cca | 4 | class DS1307{ |
chinetion | 0:74b6573c6cca | 5 | public: |
chinetion | 0:74b6573c6cca | 6 | DS1307(PinName,PinName); |
chinetion | 0:74b6573c6cca | 7 | int bcdtodec(int); |
chinetion | 0:74b6573c6cca | 8 | int dectobcd(int); |
chinetion | 0:74b6573c6cca | 9 | void gettime(int *sec,int *mins,int *hour,int *day,int *date,int *month,int *year); |
chinetion | 0:74b6573c6cca | 10 | void settime(int sec,int mins,int hour,int day,int date,int month,int year); |
chinetion | 0:74b6573c6cca | 11 | void displays(); |
chinetion | 0:74b6573c6cca | 12 | private: |
chinetion | 0:74b6573c6cca | 13 | I2C rtc; |
chinetion | 0:74b6573c6cca | 14 | DigitDisplay display; |
chinetion | 0:74b6573c6cca | 15 | bool col; |
chinetion | 0:74b6573c6cca | 16 | }; |
chinetion | 0:74b6573c6cca | 17 | DS1307::DS1307(PinName sda,PinName scl):rtc(sda,scl),display(D7, D8){ |
chinetion | 0:74b6573c6cca | 18 | col=1; |
chinetion | 0:74b6573c6cca | 19 | display.clear(); |
chinetion | 0:74b6573c6cca | 20 | } |
chinetion | 0:74b6573c6cca | 21 | void DS1307::displays(){ |
chinetion | 0:74b6573c6cca | 22 | |
chinetion | 0:74b6573c6cca | 23 | if(col){display.setColon(1);col=0;} |
chinetion | 0:74b6573c6cca | 24 | else {display.setColon(0);col=1;} |
chinetion | 0:74b6573c6cca | 25 | int sec,mins,hour,day,date,month,year; |
chinetion | 0:74b6573c6cca | 26 | gettime(&sec,&mins,&hour,&day,&date,&month,&year); |
chinetion | 0:74b6573c6cca | 27 | display.write(0, hour / 10); |
chinetion | 0:74b6573c6cca | 28 | display.write(1, hour % 10); |
chinetion | 0:74b6573c6cca | 29 | display.write(2, mins / 10); |
chinetion | 0:74b6573c6cca | 30 | display.write(3, mins % 10); |
chinetion | 0:74b6573c6cca | 31 | } |
chinetion | 0:74b6573c6cca | 32 | void DS1307::settime(int sec,int mins,int hour,int day,int date,int month,int year){ |
chinetion | 0:74b6573c6cca | 33 | char cmd[2]; |
chinetion | 0:74b6573c6cca | 34 | cmd[0] = 0x00; |
chinetion | 0:74b6573c6cca | 35 | cmd[1] = dectobcd(sec); |
chinetion | 0:74b6573c6cca | 36 | rtc.write(DS1307_ADDR, cmd, 2); |
chinetion | 0:74b6573c6cca | 37 | cmd[0] = 0x01; |
chinetion | 0:74b6573c6cca | 38 | cmd[1] = dectobcd(mins); |
chinetion | 0:74b6573c6cca | 39 | rtc.write(DS1307_ADDR, cmd, 2); |
chinetion | 0:74b6573c6cca | 40 | cmd[0] = 0x02; |
chinetion | 0:74b6573c6cca | 41 | cmd[1] = dectobcd(hour); |
chinetion | 0:74b6573c6cca | 42 | rtc.write(DS1307_ADDR, cmd, 2); |
chinetion | 0:74b6573c6cca | 43 | cmd[0] = 0x03; |
chinetion | 0:74b6573c6cca | 44 | cmd[1] = dectobcd(day); |
chinetion | 0:74b6573c6cca | 45 | rtc.write(DS1307_ADDR, cmd, 2); |
chinetion | 0:74b6573c6cca | 46 | cmd[0] = 0x04; |
chinetion | 0:74b6573c6cca | 47 | cmd[1] = dectobcd(date); |
chinetion | 0:74b6573c6cca | 48 | rtc.write(DS1307_ADDR, cmd, 2); |
chinetion | 0:74b6573c6cca | 49 | cmd[0] = 0x05; |
chinetion | 0:74b6573c6cca | 50 | cmd[1] = dectobcd(month); |
chinetion | 0:74b6573c6cca | 51 | rtc.write(DS1307_ADDR, cmd, 2); |
chinetion | 0:74b6573c6cca | 52 | cmd[0] = 0x06; |
chinetion | 0:74b6573c6cca | 53 | cmd[1] = dectobcd(year); |
chinetion | 0:74b6573c6cca | 54 | rtc.write(DS1307_ADDR, cmd, 2); |
chinetion | 0:74b6573c6cca | 55 | } |
chinetion | 0:74b6573c6cca | 56 | void DS1307::gettime(int *sec,int *mins,int *hour,int *day,int *date,int *month,int *year){ |
chinetion | 0:74b6573c6cca | 57 | char cmd = 0; |
chinetion | 0:74b6573c6cca | 58 | char v[7]; |
chinetion | 0:74b6573c6cca | 59 | for(int x=0;x<=6;x++){ |
chinetion | 0:74b6573c6cca | 60 | rtc.write(DS1307_ADDR, &cmd, 1); |
chinetion | 0:74b6573c6cca | 61 | rtc.read(DS1307_ADDR, &v[x], 1); |
chinetion | 0:74b6573c6cca | 62 | cmd++; |
chinetion | 0:74b6573c6cca | 63 | } |
chinetion | 0:74b6573c6cca | 64 | *sec=bcdtodec(v[0]); |
chinetion | 0:74b6573c6cca | 65 | *mins=bcdtodec(v[1]); |
chinetion | 0:74b6573c6cca | 66 | *hour=bcdtodec(v[2]); |
chinetion | 0:74b6573c6cca | 67 | *day=bcdtodec(v[3]); |
chinetion | 0:74b6573c6cca | 68 | *date=bcdtodec(v[4]); |
chinetion | 0:74b6573c6cca | 69 | *month=bcdtodec(v[5]); |
chinetion | 0:74b6573c6cca | 70 | *year=bcdtodec(v[6]); |
chinetion | 0:74b6573c6cca | 71 | } |
chinetion | 0:74b6573c6cca | 72 | int DS1307::bcdtodec( int bcd) { |
chinetion | 0:74b6573c6cca | 73 | int low = 0; |
chinetion | 0:74b6573c6cca | 74 | int high = 0; |
chinetion | 0:74b6573c6cca | 75 | |
chinetion | 0:74b6573c6cca | 76 | high = bcd / 16; |
chinetion | 0:74b6573c6cca | 77 | low = bcd - (high * 16); |
chinetion | 0:74b6573c6cca | 78 | return ((high * 10) + low); |
chinetion | 0:74b6573c6cca | 79 | } |
chinetion | 0:74b6573c6cca | 80 | int DS1307::dectobcd( int dec) { |
chinetion | 0:74b6573c6cca | 81 | int low = 0; |
chinetion | 0:74b6573c6cca | 82 | int high = 0; |
chinetion | 0:74b6573c6cca | 83 | |
chinetion | 0:74b6573c6cca | 84 | high = dec / 10; // this gives the high nibble value |
chinetion | 0:74b6573c6cca | 85 | low = dec - (high * 10); // this gives the lower nibble value |
chinetion | 0:74b6573c6cca | 86 | return ((high *16) + low); // this is the final bcd value but in interger format |
chinetion | 0:74b6573c6cca | 87 | } |