Example #1
0
/*----------------------------------------------------------------------*
 * Write multiple bytes to RTC RAM.                                     *
 * Valid address range is 0x00 - 0xFF, no checking.                     *
 * Number of bytes (nBytes) must be between 1 and 31 (Wire library      *
 * limitation).                                                         *
 * Returns the I2C status (zero if successful).                         *
 *----------------------------------------------------------------------*/
byte DS3232RTC::writeRTC(byte addr, byte *values, byte nBytes)
{
    i2cBeginTransmission(RTC_ADDR);
    i2cWrite(addr);
    for (byte i=0; i<nBytes; i++) i2cWrite(values[i]);
    return i2cEndTransmission();
}
/*----------------------------------------------------------------------*
 * Helper method to read a 8 bit value from the given register          *
 *----------------------------------------------------------------------*/
uint8_t I2CSoilMoistureSensor::readI2CRegister8bit(int addr, int reg) {
  i2cBeginTransmission(addr);
  i2cWrite(reg);
  i2cEndTransmission();
  delay(20);
  i2cRequestFrom(addr, 1);
  return i2cRead();
}
Example #3
0
/*----------------------------------------------------------------------*
 * Read multiple bytes from RTC RAM.                                    *
 * Valid address range is 0x00 - 0xFF, no checking.                     *
 * Number of bytes (nBytes) must be between 1 and 32 (Wire library      *
 * limitation).                                                         *
 * Returns the I2C status (zero if successful).                         *
 *----------------------------------------------------------------------*/
byte DS3232RTC::readRTC(byte addr, byte *values, byte nBytes)
{
    i2cBeginTransmission(RTC_ADDR);
    i2cWrite(addr);
    if ( byte e = i2cEndTransmission() ) return e;
    i2cRequestFrom( (uint8_t)RTC_ADDR, nBytes );
    for (byte i=0; i<nBytes; i++) values[i] = i2cRead();
    return 0;
}
/*----------------------------------------------------------------------*
 * Helper method to read a 16 bit signed value from the given register*
 *----------------------------------------------------------------------*/
int I2CSoilMoistureSensor::readI2CRegister16bitSigned(int addr, int reg) {
  i2cBeginTransmission(addr);
  i2cWrite(reg);
  i2cEndTransmission();
  delay(20);
  i2cRequestFrom(addr, 2);
  int t = i2cRead() << 8;
  t = t | i2cRead();
  return t;
}
Example #5
0
/*----------------------------------------------------------------------*
 * Set the RTC's time from a tmElements_t structure.                    *
 * Returns the I2C status (zero if successful).                         *
 *----------------------------------------------------------------------*/
byte DS3232RTC::write(tmElements_t &tm)
{
    i2cBeginTransmission(RTC_ADDR);
    i2cWrite((uint8_t)RTC_SECONDS);
    i2cWrite(dec2bcd(tm.Second));
    i2cWrite(dec2bcd(tm.Minute));
    i2cWrite(dec2bcd(tm.Hour));                  //sets 24 hour format (Bit 6 == 0)
    i2cWrite(tm.Wday);
    i2cWrite(dec2bcd(tm.Day));
    i2cWrite(dec2bcd(tm.Month));
    i2cWrite(dec2bcd(tmYearToY2k(tm.Year))); 
    return i2cEndTransmission();
}
Example #6
0
/*----------------------------------------------------------------------*
 * Read the current time from the RTC and return it in a tmElements_t   *
 * structure. Returns the I2C status (zero if successful).              *
 *----------------------------------------------------------------------*/
byte DS3232RTC::read(tmElements_t &tm)
{
    i2cBeginTransmission(RTC_ADDR);
    i2cWrite((uint8_t)RTC_SECONDS);
    if ( byte e = i2cEndTransmission() ) return e;
    //request 7 bytes (secs, min, hr, dow, date, mth, yr)
    i2cRequestFrom(RTC_ADDR, tmNbrFields);
    tm.Second = bcd2dec(i2cRead() & ~_BV(DS1307_CH));   
    tm.Minute = bcd2dec(i2cRead());
    tm.Hour = bcd2dec(i2cRead() & ~_BV(HR1224));    //assumes 24hr clock
    tm.Wday = i2cRead();
    tm.Day = bcd2dec(i2cRead());
    tm.Month = bcd2dec(i2cRead() & ~_BV(CENTURY));  //don't use the Century bit
    tm.Year = y2kYearToTm(bcd2dec(i2cRead()));
    return 0;
}
Example #7
0
/*----------------------------------------------------------------------*
 * Sets the RTC's time from a tmElements_t structure and clears the     *
 * oscillator stop flag (OSF) in the Control/Status register.           *
 * Returns the I2C status (zero if successful).                         *
 *----------------------------------------------------------------------*/
byte DS3232RTC::write(tmElements_t &tm)
{
    i2cBeginTransmission(RTC_ADDR);
    i2cWrite((uint8_t)RTC_SECONDS);
    i2cWrite(dec2bcd(tm.Second));
    i2cWrite(dec2bcd(tm.Minute));
    i2cWrite(dec2bcd(tm.Hour));         //sets 24 hour format (Bit 6 == 0)
    i2cWrite(tm.Wday);
    i2cWrite(dec2bcd(tm.Day));
    i2cWrite(dec2bcd(tm.Month));
    i2cWrite(dec2bcd(tmYearToY2k(tm.Year))); 
    byte ret = i2cEndTransmission();
    uint8_t s = readRTC(RTC_STATUS);        //read the status register
    writeRTC( RTC_STATUS, s & ~_BV(OSF) );  //clear the Oscillator Stop Flag
    return ret;
}
/*----------------------------------------------------------------------*
 * Helper method to write an 8 bit value to the sensor via I2C to the   *
 * given register                                                       *
 *----------------------------------------------------------------------*/
void I2CSoilMoistureSensor::writeI2CRegister8bit(int addr, int reg, int value) {
  i2cBeginTransmission(addr);
  i2cWrite(reg);
  i2cWrite(value);
  i2cEndTransmission();
}