Code for Technion Formula car sensors reader
Dependencies: mbed Buffer FATFileSystem
Fork of SX1272PingPong by
This is code is part of a Technion course project in advanced IoT, implementing a device to read and transmit sensors data from a Formula racing car built by students at Technion - Israel Institute of Technology.
How to install
- Create an account on Mbed: https://os.mbed.com/account/signup/
- Import project into Compiler
- In the Program Workspace select "Formula_Nucleo_Reader"
- Select a Platform like so:
- Click button at top-left
- Add Board
- Search "NUCLEO F103RB" and then "Add to your Mbed Compiler"
- Finally click "Compile", if the build was successful, the binary would download automatically
- To install it on device simply plug it in to a PC, open device drive and drag then drop binary file in it
DS3231/DS3231.cpp@15:2e0d977dbb31, 2018-05-17 (annotated)
- Committer:
- wardm
- Date:
- Thu May 17 20:37:41 2018 +0000
- Revision:
- 15:2e0d977dbb31
V1.0.0
Who changed what in which revision?
User | Revision | Line number | New contents of line |
---|---|---|---|
wardm | 15:2e0d977dbb31 | 1 | #include "DS3231.h" |
wardm | 15:2e0d977dbb31 | 2 | |
wardm | 15:2e0d977dbb31 | 3 | DS3231::DS3231(PinName sda, PinName scl) : i2c(sda, scl) |
wardm | 15:2e0d977dbb31 | 4 | { |
wardm | 15:2e0d977dbb31 | 5 | } |
wardm | 15:2e0d977dbb31 | 6 | |
wardm | 15:2e0d977dbb31 | 7 | |
wardm | 15:2e0d977dbb31 | 8 | // BCD to decimal conversion |
wardm | 15:2e0d977dbb31 | 9 | int DS3231::bcd2dec(int k) |
wardm | 15:2e0d977dbb31 | 10 | {return(((k&0xF0)>>4)*10+(k&0x0F));} |
wardm | 15:2e0d977dbb31 | 11 | |
wardm | 15:2e0d977dbb31 | 12 | |
wardm | 15:2e0d977dbb31 | 13 | // decimal to BCD conversion |
wardm | 15:2e0d977dbb31 | 14 | int DS3231::dec2bcd(int k) |
wardm | 15:2e0d977dbb31 | 15 | {return((k/10)*16+(k%10));} |
wardm | 15:2e0d977dbb31 | 16 | |
wardm | 15:2e0d977dbb31 | 17 | void DS3231::setI2Cfrequency(int frequency) |
wardm | 15:2e0d977dbb31 | 18 | {i2c.frequency(frequency); |
wardm | 15:2e0d977dbb31 | 19 | } |
wardm | 15:2e0d977dbb31 | 20 | |
wardm | 15:2e0d977dbb31 | 21 | // read temperature from DS3231 |
wardm | 15:2e0d977dbb31 | 22 | float DS3231::readTemp() |
wardm | 15:2e0d977dbb31 | 23 | {char buf[2]; |
wardm | 15:2e0d977dbb31 | 24 | buf[0]=DS3231_MSB_Temp; |
wardm | 15:2e0d977dbb31 | 25 | int w=i2c.write(DS3231_Address,buf,1); |
wardm | 15:2e0d977dbb31 | 26 | int r=i2c.read(DS3231_Address,buf,2); |
wardm | 15:2e0d977dbb31 | 27 | error=((w!=0)||(r!=0)); |
wardm | 15:2e0d977dbb31 | 28 | return(buf[0]+buf[1]/256.0);} |
wardm | 15:2e0d977dbb31 | 29 | |
wardm | 15:2e0d977dbb31 | 30 | // force temperatue conversion |
wardm | 15:2e0d977dbb31 | 31 | void DS3231::convertTemperature() |
wardm | 15:2e0d977dbb31 | 32 | {int Control=readRegister(DS3231_Control)|DS3231_bit_CONV; |
wardm | 15:2e0d977dbb31 | 33 | writeRegister(DS3231_Control,Control); |
wardm | 15:2e0d977dbb31 | 34 | } |
wardm | 15:2e0d977dbb31 | 35 | |
wardm | 15:2e0d977dbb31 | 36 | // decode time registers |
wardm | 15:2e0d977dbb31 | 37 | void DS3231::decodeTime(int regHours, int regMinutes, int regSeconds,int *Hours, int *Minutes, int *Seconds) |
wardm | 15:2e0d977dbb31 | 38 | {*Hours=bcd2dec(regHours); |
wardm | 15:2e0d977dbb31 | 39 | *Minutes=bcd2dec(regMinutes); |
wardm | 15:2e0d977dbb31 | 40 | *Seconds=bcd2dec(regSeconds); |
wardm | 15:2e0d977dbb31 | 41 | } |
wardm | 15:2e0d977dbb31 | 42 | |
wardm | 15:2e0d977dbb31 | 43 | |
wardm | 15:2e0d977dbb31 | 44 | // read time registers dand decode them to decimal |
wardm | 15:2e0d977dbb31 | 45 | void DS3231::readTime(int *hours, int *minutes, int *seconds) |
wardm | 15:2e0d977dbb31 | 46 | {char buf[3]; |
wardm | 15:2e0d977dbb31 | 47 | buf[0]=DS3231_Seconds; |
wardm | 15:2e0d977dbb31 | 48 | int w=i2c.write(DS3231_Address,buf,1); |
wardm | 15:2e0d977dbb31 | 49 | int r=i2c.read(DS3231_Address,buf,3); |
wardm | 15:2e0d977dbb31 | 50 | decodeTime(buf[2],buf[1],buf[0],hours,minutes,seconds); |
wardm | 15:2e0d977dbb31 | 51 | error=((w!=0)||(r!=0)); |
wardm | 15:2e0d977dbb31 | 52 | } |
wardm | 15:2e0d977dbb31 | 53 | |
wardm | 15:2e0d977dbb31 | 54 | // set time register |
wardm | 15:2e0d977dbb31 | 55 | void DS3231::setTime(int hours, int minutes, int seconds) |
wardm | 15:2e0d977dbb31 | 56 | {writeRegister(DS3231_Seconds,dec2bcd(seconds)); |
wardm | 15:2e0d977dbb31 | 57 | writeRegister(DS3231_Minutes,dec2bcd(minutes)); |
wardm | 15:2e0d977dbb31 | 58 | writeRegister(DS3231_Hours,dec2bcd(hours)); |
wardm | 15:2e0d977dbb31 | 59 | } |
wardm | 15:2e0d977dbb31 | 60 | |
wardm | 15:2e0d977dbb31 | 61 | // decode date registers |
wardm | 15:2e0d977dbb31 | 62 | void DS3231::decodeDate(int regDate,int regMonth, int regYear, int *date, int *month, int *year) |
wardm | 15:2e0d977dbb31 | 63 | {*date=bcd2dec(regDate); |
wardm | 15:2e0d977dbb31 | 64 | int century=regMonth&128; |
wardm | 15:2e0d977dbb31 | 65 | *month=bcd2dec(regMonth&127); |
wardm | 15:2e0d977dbb31 | 66 | *year=bcd2dec(regYear); |
wardm | 15:2e0d977dbb31 | 67 | if (century==0) // only XXth and XXIst centuries allowed |
wardm | 15:2e0d977dbb31 | 68 | {*year=*year+1900;} |
wardm | 15:2e0d977dbb31 | 69 | else |
wardm | 15:2e0d977dbb31 | 70 | {*year=*year+2000;} |
wardm | 15:2e0d977dbb31 | 71 | } |
wardm | 15:2e0d977dbb31 | 72 | |
wardm | 15:2e0d977dbb31 | 73 | // read date registers |
wardm | 15:2e0d977dbb31 | 74 | void DS3231::readDate(int *date, int *month, int *year) |
wardm | 15:2e0d977dbb31 | 75 | {char buf[3]; |
wardm | 15:2e0d977dbb31 | 76 | buf[0]=DS3231_Date; |
wardm | 15:2e0d977dbb31 | 77 | int w=i2c.write(DS3231_Address,buf,1); |
wardm | 15:2e0d977dbb31 | 78 | int r=i2c.read(DS3231_Address,buf,3); |
wardm | 15:2e0d977dbb31 | 79 | decodeDate(buf[0],buf[1],buf[2],date,month,year); |
wardm | 15:2e0d977dbb31 | 80 | error=((w!=0)||(r!=0)); |
wardm | 15:2e0d977dbb31 | 81 | } |
wardm | 15:2e0d977dbb31 | 82 | |
wardm | 15:2e0d977dbb31 | 83 | // set the date registers |
wardm | 15:2e0d977dbb31 | 84 | void DS3231::setDate(int dayOfWeek, int date, int month, int year) |
wardm | 15:2e0d977dbb31 | 85 | {writeRegister(DS3231_Date,dec2bcd(date)); |
wardm | 15:2e0d977dbb31 | 86 | writeRegister(DS3231_Day,dayOfWeek); |
wardm | 15:2e0d977dbb31 | 87 | int century=0; // only XXth and XXIst centuries allowed |
wardm | 15:2e0d977dbb31 | 88 | if (year<1900){year=1900;} |
wardm | 15:2e0d977dbb31 | 89 | if (year>2099){year=2099;} |
wardm | 15:2e0d977dbb31 | 90 | if (year<2000) |
wardm | 15:2e0d977dbb31 | 91 | {year=year-1900;} |
wardm | 15:2e0d977dbb31 | 92 | else |
wardm | 15:2e0d977dbb31 | 93 | {year=year-2000;century=1;} |
wardm | 15:2e0d977dbb31 | 94 | writeRegister(DS3231_Month_Century,dec2bcd(month)+128*century); |
wardm | 15:2e0d977dbb31 | 95 | writeRegister(DS3231_Year,dec2bcd(year)); |
wardm | 15:2e0d977dbb31 | 96 | } |
wardm | 15:2e0d977dbb31 | 97 | |
wardm | 15:2e0d977dbb31 | 98 | // read date and time registers |
wardm | 15:2e0d977dbb31 | 99 | void DS3231::readDateTime(int *dayOfWeek, int *date, int *month, int *year, int *hours, int *minutes, int *seconds) |
wardm | 15:2e0d977dbb31 | 100 | {char buf[7]; |
wardm | 15:2e0d977dbb31 | 101 | buf[0]=DS3231_Seconds; |
wardm | 15:2e0d977dbb31 | 102 | int w=i2c.write(DS3231_Address,buf,1); |
wardm | 15:2e0d977dbb31 | 103 | int r=i2c.read(DS3231_Address,buf,7); |
wardm | 15:2e0d977dbb31 | 104 | decodeTime(buf[2],buf[1],buf[0],hours,minutes,seconds); |
wardm | 15:2e0d977dbb31 | 105 | *dayOfWeek=buf[3]; |
wardm | 15:2e0d977dbb31 | 106 | decodeDate(buf[4],buf[5],buf[6],date,month,year); |
wardm | 15:2e0d977dbb31 | 107 | error=((w!=0)||(r!=0)); |
wardm | 15:2e0d977dbb31 | 108 | } |
wardm | 15:2e0d977dbb31 | 109 | |
wardm | 15:2e0d977dbb31 | 110 | // read a register |
wardm | 15:2e0d977dbb31 | 111 | int DS3231::readRegister(char reg) |
wardm | 15:2e0d977dbb31 | 112 | {char buf[1]; |
wardm | 15:2e0d977dbb31 | 113 | buf[0]=reg; |
wardm | 15:2e0d977dbb31 | 114 | int w=i2c.write(DS3231_Address,buf,1); |
wardm | 15:2e0d977dbb31 | 115 | int r=i2c.read(DS3231_Address,buf,1); |
wardm | 15:2e0d977dbb31 | 116 | error=((w!=0)||(r!=0)); |
wardm | 15:2e0d977dbb31 | 117 | return(buf[0]); |
wardm | 15:2e0d977dbb31 | 118 | } |
wardm | 15:2e0d977dbb31 | 119 | |
wardm | 15:2e0d977dbb31 | 120 | // write a register |
wardm | 15:2e0d977dbb31 | 121 | void DS3231::writeRegister(int reg,char byte) |
wardm | 15:2e0d977dbb31 | 122 | {char buf[2]; |
wardm | 15:2e0d977dbb31 | 123 | buf[0]=reg; |
wardm | 15:2e0d977dbb31 | 124 | buf[1]=byte; |
wardm | 15:2e0d977dbb31 | 125 | int w=i2c.write(DS3231_Address,buf,2); |
wardm | 15:2e0d977dbb31 | 126 | error=(w!=0); |
wardm | 15:2e0d977dbb31 | 127 | } |
wardm | 15:2e0d977dbb31 | 128 | |
wardm | 15:2e0d977dbb31 | 129 | void DS3231::eraseOSF() |
wardm | 15:2e0d977dbb31 | 130 | {int reg=readRegister(DS3231_Control_Status); |
wardm | 15:2e0d977dbb31 | 131 | reg=reg&0x7F; |
wardm | 15:2e0d977dbb31 | 132 | writeRegister(DS3231_Control_Status,reg); |
wardm | 15:2e0d977dbb31 | 133 | } |
wardm | 15:2e0d977dbb31 | 134 | |
wardm | 15:2e0d977dbb31 | 135 | bool DS3231::OSF() |
wardm | 15:2e0d977dbb31 | 136 | {int reg=readRegister(DS3231_Control_Status); |
wardm | 15:2e0d977dbb31 | 137 | return(reg&DS3231_bit_OSF); |
wardm | 15:2e0d977dbb31 | 138 | } |