Manuel Caballero
64 x 8, Serial, I2C Real-Time Clock
DS1307.cpp
- Committer:
- mcm
- Date:
- 2018-07-31
- Revision:
- 2:190cad1b683d
- Parent:
- 0:73dc094709f0
File content as of revision 2:190cad1b683d:
/**
* @brief DS1307.c
* @details 64 x 8, Serial, I2C Real-Time Clock.
* Functions file.
*
*
* @return N/A
*
* @author Manuel Caballero
* @date 31/July/2018
* @version 31/July/2018 The ORIGIN
* @pre N/A.
* @warning N/A
* @pre This code belongs to AqueronteBlog ( http://unbarquero.blogspot.com ).
*/
#include "DS1307.h"
DS1307::DS1307 ( PinName sda, PinName scl, uint32_t addr, uint32_t freq )
: _i2c ( sda, scl )
, _DS1307_Addr ( addr )
{
_i2c.frequency( freq );
}
DS1307::~DS1307()
{
}
/**
* @brief DS1307_SquareWaveOutput ( DS1307_control_sqwe_t , DS1307_control_rate_select_t )
*
* @details It configures the square-wave output.
*
* @param[in] mySQWE: Square-wave output enabled/disabled.
* @param[in] myRateSelect: Rate select.
*
* @param[out] N/A.
*
*
* @return Status of DS1307_SquareWaveOutput.
*
*
* @author Manuel Caballero
* @date 30/July/2018
* @version 30/July/2018 The ORIGIN
* @pre N/A.
* @warning N/A.
*/
DS1307::DS1307_status_t DS1307::DS1307_SquareWaveOutput ( DS1307_control_sqwe_t mySQWE, DS1307_control_rate_select_t myRateSelect )
{
char cmd[] = { 0, 0 };
uint32_t aux;
/* Read CONTROL REGISTER to mask it */
cmd[0] = DS1307_CONTROL;
aux = _i2c.write ( _DS1307_Addr, &cmd[0], 1U, true );
aux = _i2c.read ( _DS1307_Addr, &cmd[1], 1U );
/* Update the register */
cmd[1] &= ~( CONTROL_SQWE_MASK | CONTROL_RS_MASK );
cmd[1] |= ( mySQWE | myRateSelect );
aux = _i2c.write ( _DS1307_Addr, &cmd[0], sizeof( cmd )/sizeof( cmd[0] ), false );
if ( aux == I2C_SUCCESS ) {
return DS1307_SUCCESS;
} else {
return DS1307_FAILURE;
}
}
/**
* @brief DS1307_ConfOutput ( DS1307_control_out_t )
*
* @details It configures the output pin ( OUT ).
*
* @param[in] myOUT: OUT pin High/Low.
*
* @param[out] N/A.
*
*
* @return Status of DS1307_ConfOutput.
*
*
* @author Manuel Caballero
* @date 30/July/2018
* @version 30/July/2018 The ORIGIN
* @pre N/A.
* @warning Square-wave output must be disabled.
*/
DS1307::DS1307_status_t DS1307::DS1307_ConfOutput ( DS1307_control_out_t myOUT )
{
char cmd[] = { 0, 0 };
uint32_t aux;
/* Read CONTROL REGISTER to mask it */
cmd[0] = DS1307_CONTROL;
aux = _i2c.write ( _DS1307_Addr, &cmd[0], 1U, true );
aux = _i2c.read ( _DS1307_Addr, &cmd[1], 1U );
/* Update the register */
cmd[1] &= ~( CONTROL_OUT_MASK );
cmd[1] |= myOUT;
aux = _i2c.write ( _DS1307_Addr, &cmd[0], sizeof( cmd )/sizeof( cmd[0] ), false );
if ( aux == I2C_SUCCESS ) {
return DS1307_SUCCESS;
} else {
return DS1307_FAILURE;
}
}
/**
* @brief DS1307_SetTime ( DS1307_vector_data_t )
*
* @details It sets the time ( BCD mode ).
*
* @param[in] myTime: Time in BCD mode.
*
* @param[out] N/A.
*
*
* @return Status of DS1307_SetTime.
*
*
* @author Manuel Caballero
* @date 30/July/2018
* @version 30/July/2018 The ORIGIN
* @pre i.e1: 20:35.59 24h --> 0x203559 24h Enabled.
* i.e2: 08:35.59 12h --> 0x083559 12h Enabled ( PM ).
* @warning N/A.
*/
DS1307::DS1307_status_t DS1307::DS1307_SetTime ( DS1307_vector_data_t myTime )
{
char cmd[] = { 0, 0 };
uint32_t aux;
/* SECONDS */
/* Read SECONDS REGISTER to mask it */
cmd[0] = DS1307_SECONDS;
aux = _i2c.write ( _DS1307_Addr, &cmd[0], 1U, true );
aux = _i2c.read ( _DS1307_Addr, &cmd[1], 1U );
/* Update the register */
cmd[1] &= ~( SECONDS_10SECONDS_MASK | SECONDS_SECONDS_MASK );
cmd[1] |= ( myTime.BCDTime & ( SECONDS_10SECONDS_MASK | SECONDS_SECONDS_MASK ) );
aux = _i2c.write ( _DS1307_Addr, &cmd[0], sizeof( cmd )/sizeof( cmd[0] ), false );
/* MINUTES */
/* Read MINUTES REGISTER to mask it */
cmd[0] = DS1307_MINUTES;
aux = _i2c.write ( _DS1307_Addr, &cmd[0], 1U, true );
aux = _i2c.read ( _DS1307_Addr, &cmd[1], 1U );
/* Update the register */
cmd[1] &= ~( MINUTES_10MINUTES_MASK | MINUTES_MINUTES_MASK );
cmd[1] |= ( ( myTime.BCDTime >> 8U ) & ( MINUTES_10MINUTES_MASK | MINUTES_MINUTES_MASK ) );
aux = _i2c.write ( _DS1307_Addr, &cmd[0], sizeof( cmd )/sizeof( cmd[0] ), false );
/* HOURS */
/* Read HOURS REGISTER to mask it */
cmd[0] = DS1307_HOURS;
aux = _i2c.write ( _DS1307_Addr, &cmd[0], 1U, true );
aux = _i2c.read ( _DS1307_Addr, &cmd[1], 1U );
/* Mask the register */
cmd[1] &= ~( HOURS_MODE_MASK | HOUR_10HOUR_MASK | HOUR_HOURS_MASK );
/* Check if it is 12h or 24h mode */
if ( myTime.Time12H_24HMode == HOURS_MODE_24H ) {
cmd[1] |= ( ( ( myTime.BCDTime >> 16U ) & ( HOUR_10HOUR_MASK | HOUR_HOURS_MASK ) ) | myTime.Time12H_24HMode );
} else {
cmd[1] |= ( ( ( myTime.BCDTime >> 16U ) & ( HOUR_10HOUR_MASK | HOUR_HOURS_MASK ) ) | ( myTime.Time12H_24HMode | myTime.TimeAM_PM_Mode ) );
}
/* Update the register */
aux = _i2c.write ( _DS1307_Addr, &cmd[0], sizeof( cmd )/sizeof( cmd[0] ), false );
if ( aux == I2C_SUCCESS ) {
return DS1307_SUCCESS;
} else {
return DS1307_FAILURE;
}
}
/**
* @brief DS1307_GetTime ( DS1307_vector_data_t* )
*
* @details It gets the time ( BCD mode ).
*
* @param[in] N/A.
*
* @param[out] myTime: Time in BCD mode.
*
*
* @return Status of DS1307_GetTime.
*
*
* @author Manuel Caballero
* @date 30/July/2018
* @version 30/July/2018 The ORIGIN
* @pre i.e1: 20:35.59 24h --> 0x203559 24h Enabled.
* i.e2: 08:35.59 12h --> 0x083559 12h Enabled ( PM ).
* @warning N/A.
*/
DS1307::DS1307_status_t DS1307::DS1307_GetTime ( DS1307_vector_data_t* myTime )
{
char cmd[] = { 0, 0 };
uint32_t aux;
/* HOURS */
/* Read HOURS REGISTER */
cmd[0] = DS1307_HOURS;
aux = _i2c.write ( _DS1307_Addr, &cmd[0], 1U, true );
aux = _i2c.read ( _DS1307_Addr, &cmd[1], 1U );
/* Parse the data */
myTime->BCDTime = ( cmd[1] & ( HOUR_10HOUR_MASK | HOUR_HOURS_MASK ) );
/* Check if it is 12h or 24h mode */
if ( ( cmd[1] & HOURS_MODE_MASK ) == HOURS_MODE_24H ) {
/* 24h mode */
myTime->Time12H_24HMode = HOURS_MODE_24H;
/* Update the PM/AM mode variable */
if ( ( cmd[1] & ( HOUR_10HOUR_MASK | HOUR_HOURS_MASK ) ) >= 0x12 ) {
myTime->TimeAM_PM_Mode = HOURS_MODE_PM;
} else {
myTime->TimeAM_PM_Mode = HOURS_MODE_AM;
}
} else {
/* 12h mode */
myTime->Time12H_24HMode = HOURS_MODE_12H;
myTime->TimeAM_PM_Mode = (DS1307_hours_am_pm_mode_t) ( cmd[1] & HOURS_MODE_AM_PM_MASK );
myTime->BCDTime &= ~( HOURS_MODE_AM_PM_MASK );
}
myTime->BCDTime <<= 8U;
/* MINUTES */
/* Read MINUTES REGISTER to mask it */
cmd[0] = DS1307_MINUTES;
aux = _i2c.write ( _DS1307_Addr, &cmd[0], 1U, true );
aux = _i2c.read ( _DS1307_Addr, &cmd[1], 1U );
/* Parse the data */
cmd[1] &= ( MINUTES_10MINUTES_MASK | MINUTES_MINUTES_MASK );
myTime->BCDTime |= cmd[1];
myTime->BCDTime <<= 8U;
/* SECONDS */
/* Read SECONDS REGISTER to mask it */
cmd[0] = DS1307_SECONDS;
aux = _i2c.write ( _DS1307_Addr, &cmd[0], 1U, true );
aux = _i2c.read ( _DS1307_Addr, &cmd[1], 1U );
/* Parse the data */
cmd[1] &= ( SECONDS_10SECONDS_MASK | SECONDS_SECONDS_MASK );
myTime->BCDTime |= cmd[1];
if ( aux == I2C_SUCCESS ) {
return DS1307_SUCCESS;
} else {
return DS1307_FAILURE;
}
}
/**
* @brief DS1307_SetDayOfTheWeek ( DS1307_vector_data_t )
*
* @details It sets the day of the week.
*
* @param[in] myDayOfTheWeek: Day of the week.
*
* @param[out] N/A.
*
*
* @return Status of DS1307_SetDayOfTheWeek.
*
*
* @author Manuel Caballero
* @date 30/July/2018
* @version 30/July/2018 The ORIGIN
* @pre N/A.
* @warning N/A.
*/
DS1307::DS1307_status_t DS1307::DS1307_SetDayOfTheWeek ( DS1307_vector_data_t myDayOfTheWeek )
{
char cmd[] = { 0, 0 };
uint32_t aux;
/* Read DAY REGISTER to mask it */
cmd[0] = DS1307_DAY;
aux = _i2c.write ( _DS1307_Addr, &cmd[0], 1U, true );
aux = _i2c.read ( _DS1307_Addr, &cmd[1], 1U );
/* Update the register */
cmd[1] &= ~( DAY_MASK );
cmd[1] |= myDayOfTheWeek.DayOfTheWeek;
aux = _i2c.write ( _DS1307_Addr, &cmd[0], sizeof( cmd )/sizeof( cmd[0] ), false );
if ( aux == I2C_SUCCESS ) {
return DS1307_SUCCESS;
} else {
return DS1307_FAILURE;
}
}
/**
* @brief DS1307_GetDayOfTheWeek ( DS1307_vector_data_t )
*
* @details It gets the day of the week.
*
* @param[in] N/A.
*
* @param[out] myDayOfTheWeek: Day of the week.
*
*
* @return Status of DS1307_GetDayOfTheWeek.
*
*
* @author Manuel Caballero
* @date 30/July/2018
* @version 30/July/2018 The ORIGIN
* @pre N/A.
* @warning N/A.
*/
DS1307::DS1307_status_t DS1307::DS1307_GetDayOfTheWeek ( DS1307_vector_data_t* myDayOfTheWeek )
{
char cmd[] = { 0, 0 };
uint32_t aux;
/* Read DAY REGISTER to mask it */
cmd[0] = DS1307_DAY;
aux = _i2c.write ( _DS1307_Addr, &cmd[0], 1U, true );
aux = _i2c.read ( _DS1307_Addr, &cmd[1], 1U );
/* Parse the data */
myDayOfTheWeek->DayOfTheWeek = (DS1307_day_t)( cmd[1] & DAY_MASK );
if ( aux == I2C_SUCCESS ) {
return DS1307_SUCCESS;
} else {
return DS1307_FAILURE;
}
}
/**
* @brief DS1307_SetDate ( DS1307_vector_data_t )
*
* @details It sets the date ( BCD mode ).
*
* @param[in] myDate: Date.
*
* @param[out] N/A.
*
*
* @return Status of DS1307_SetDate.
*
*
* @author Manuel Caballero
* @date 30/July/2018
* @version 30/July/2018 The ORIGIN
* @pre i.e1: 01: 0x01.
* i.e2: 12: 0x12.
* @warning N/A.
*/
DS1307::DS1307_status_t DS1307::DS1307_SetDate ( DS1307_vector_data_t myDate )
{
char cmd[] = { 0, 0 };
uint32_t aux;
/* Check date limits */
if ( ( myDate.BCDDate >= 0x01 ) && ( myDate.BCDDate <= 0x31 ) ) {
/* Read DATE REGISTER to mask it */
cmd[0] = DS1307_DATE;
aux = _i2c.write ( _DS1307_Addr, &cmd[0], 1U, true );
aux = _i2c.read ( _DS1307_Addr, &cmd[1], 1U );
/* Update the register */
cmd[1] &= ~( DATE_10DATE_MASK | DATE_DATE_MASK );
cmd[1] |= myDate.BCDDate;
aux = _i2c.write ( _DS1307_Addr, &cmd[0], sizeof( cmd )/sizeof( cmd[0] ), false );
} else {
return DS1307_FAILURE;
}
if ( aux == I2C_SUCCESS ) {
return DS1307_SUCCESS;
} else {
return DS1307_FAILURE;
}
}
/**
* @brief DS1307_GetDate ( DS1307_vector_data_t* )
*
* @details It gets the date ( BCD mode ).
*
* @param[in] N/A.
*
* @param[out] myDate: Date.
*
*
* @return Status of DS1307_GetDate.
*
*
* @author Manuel Caballero
* @date 30/July/2018
* @version 30/July/2018 The ORIGIN
* @pre i.e1: 01: 0x01.
* i.e2: 12: 0x12.
* @warning N/A.
*/
DS1307::DS1307_status_t DS1307::DS1307_GetDate ( DS1307_vector_data_t* myDate )
{
char cmd[] = { 0, 0 };
uint32_t aux;
/* Read DATE REGISTER to mask it */
cmd[0] = DS1307_DATE;
aux = _i2c.write ( _DS1307_Addr, &cmd[0], 1U, true );
aux = _i2c.read ( _DS1307_Addr, &cmd[1], 1U );
/* Parse the data */
myDate->BCDDate = ( cmd[1] & ( DATE_10DATE_MASK | DATE_DATE_MASK ) );
if ( aux == I2C_SUCCESS ) {
return DS1307_SUCCESS;
} else {
return DS1307_FAILURE;
}
}
/**
* @brief DS1307_SetMonth ( DS1307_vector_data_t )
*
* @details It sets the month ( BCD mode ).
*
* @param[in] myMonth: Month.
*
* @param[out] N/A.
*
*
* @return Status of DS1307_SetMonth.
*
*
* @author Manuel Caballero
* @date 30/July/2018
* @version 30/July/2018 The ORIGIN
* @pre i.e1: January: 0x01.
* i.e2: December: 0x12.
* @warning N/A.
*/
DS1307::DS1307_status_t DS1307::DS1307_SetMonth ( DS1307_vector_data_t myMonth )
{
char cmd[] = { 0, 0 };
uint32_t aux;
/* Read MONTH REGISTER to mask it */
cmd[0] = DS1307_MONTH;
aux = _i2c.write ( _DS1307_Addr, &cmd[0], 1U, true );
aux = _i2c.read ( _DS1307_Addr, &cmd[1], 1U );
/* Update the register */
cmd[1] &= ~( MONTH_10MONTH_MASK | MONTH_MONTH_MASK );
cmd[1] |= myMonth.BCDMonth;
aux = _i2c.write ( _DS1307_Addr, &cmd[0], sizeof( cmd )/sizeof( cmd[0] ), false );
if ( aux == I2C_SUCCESS ) {
return DS1307_SUCCESS;
} else {
return DS1307_FAILURE;
}
}
/**
* @brief DS1307_GetMonth ( DS1307_vector_data_t* )
*
* @details It gets the month ( BCD mode ).
*
* @param[in] N/A.
*
* @param[out] myMonth: Month.
*
*
* @return Status of DS1307_GetMonth.
*
*
* @author Manuel Caballero
* @date 30/July/2018
* @version 30/July/2018 The ORIGIN
* @pre i.e1: January: 0x01.
* i.e2: December: 0x12.
* @warning N/A.
*/
DS1307::DS1307_status_t DS1307::DS1307_GetMonth ( DS1307_vector_data_t* myMonth )
{
char cmd[] = { 0, 0 };
uint32_t aux;
/* Read MONTH REGISTER to mask it */
cmd[0] = DS1307_MONTH;
aux = _i2c.write ( _DS1307_Addr, &cmd[0], 1U, true );
aux = _i2c.read ( _DS1307_Addr, &cmd[1], 1U );
/* Parse the data */
myMonth->BCDMonth = (DS1307_month_t)( cmd[1] & ( MONTH_10MONTH_MASK | MONTH_MONTH_MASK ) );
if ( aux == I2C_SUCCESS ) {
return DS1307_SUCCESS;
} else {
return DS1307_FAILURE;
}
}
/**
* @brief DS1307_SetYear ( DS1307_vector_data_t )
*
* @details It sets the year ( BCD mode ).
*
* @param[in] myYear: Year.
*
* @param[out] N/A.
*
*
* @return Status of DS1307_SetYear.
*
*
* @author Manuel Caballero
* @date 30/July/2018
* @version 30/July/2018 The ORIGIN
* @pre i.e1: 2000: 0x00.
* i.e2: 2018: 0x18.
* @warning N/A.
*/
DS1307::DS1307_status_t DS1307::DS1307_SetYear ( DS1307_vector_data_t myYear )
{
char cmd[] = { 0, 0 };
uint32_t aux;
/* Update the register */
cmd[0] = DS1307_YEAR;
cmd[1] = myYear.BCDYear;
aux = _i2c.write ( _DS1307_Addr, &cmd[0], sizeof( cmd )/sizeof( cmd[0] ), false );
if ( aux == I2C_SUCCESS ) {
return DS1307_SUCCESS;
} else {
return DS1307_FAILURE;
}
}
/**
* @brief DS1307_GetYear ( DS1307_vector_data_t* )
*
* @details It gets the year ( BCD mode ).
*
* @param[in] N/A
*
* @param[out] myYear: Year.
*
*
* @return Status of DS1307_GetYear.
*
*
* @author Manuel Caballero
* @date 30/July/2018
* @version 30/July/2018 The ORIGIN
* @pre i.e1: 2000: 0x00.
* i.e2: 2018: 0x18.
* @warning N/A.
*/
DS1307::DS1307_status_t DS1307::DS1307_GetYear ( DS1307_vector_data_t* myYear )
{
char cmd = 0;
uint32_t aux;
/* Read YEAR REGISTER to mask it */
cmd = DS1307_YEAR;
aux = _i2c.write ( _DS1307_Addr, &cmd, 1U, true );
aux = _i2c.read ( _DS1307_Addr, (char*)&myYear->BCDYear, 1U );
if ( aux == I2C_SUCCESS ) {
return DS1307_SUCCESS;
} else {
return DS1307_FAILURE;
}
}
/**
* @brief DS1307_OscillatorMode ( DS1307_seconds_ch_t )
*
* @details It enables/disabled the oscillator.
*
* @param[in] myOscillator: Oscillator enabled/disabled.
*
* @param[out] N/A.
*
*
* @return Status of DS1307_OscillatorMode.
*
*
* @author Manuel Caballero
* @date 31/July/2018
* @version 31/July/2018 The ORIGIN
* @pre The clock can be halted whenever the timekeeping functions are not required,
* which minimizes current ( I_BATDR ).
* @warning N/A.
*/
DS1307::DS1307_status_t DS1307::DS1307_OscillatorMode ( DS1307_seconds_ch_t myOscillator )
{
char cmd[] = { 0, 0 };
uint32_t aux;
/* Read SECONDS REGISTER to mask it */
cmd[0] = DS1307_SECONDS;
aux = _i2c.write ( _DS1307_Addr, &cmd[0], 1U, true );
aux = _i2c.read ( _DS1307_Addr, &cmd[1], 1U );
/* Update the register */
cmd[1] &= ~( SECONDS_CH_MASK );
cmd[1] |= myOscillator;
aux = _i2c.write ( _DS1307_Addr, &cmd[0], sizeof( cmd )/sizeof( cmd[0] ), false );
if ( aux == I2C_SUCCESS ) {
return DS1307_SUCCESS;
} else {
return DS1307_FAILURE;
}
}
/**
* @brief DS1307_WriteByteRAM ( uint8_t , uint8_t )
*
* @details It writes a byte into the RAM memory.
*
* @param[in] myByte: Byte to be written.
* @param[in] myAddress: Address to write the byte.
*
* @param[out] N/A.
*
*
* @return Status of DS1307_WriteByteRAM.
*
*
* @author Manuel Caballero
* @date 31/July/2018
* @version 31/July/2018 The ORIGIN
* @pre N/A.
* @warning N/A.
*/
DS1307::DS1307_status_t DS1307::DS1307_WriteByteRAM ( uint8_t myByte, uint8_t myAddress )
{
char cmd[] = { 0, 0 };
uint32_t aux;
/* Check RAM memory limits */
if ( ( myAddress >= 0x08 ) && ( myAddress <= 0x3F ) ) {
/* Write data into the RAM memory */
cmd[0] = myAddress;
cmd[1] = myByte;
aux = _i2c.write ( _DS1307_Addr, &cmd[0], sizeof( cmd )/sizeof( cmd[0] ), false );
} else {
return DS1307_FAILURE;
}
if ( aux == I2C_SUCCESS ) {
return DS1307_SUCCESS;
} else {
return DS1307_FAILURE;
}
}
/**
* @brief DS1307_ReadByteRAM ( uint8_t* , uint8_t )
*
* @details It reads a byte from the RAM memory.
*
* @param[in] myAddress: Address to write the byte.
*
* @param[out] myByte: Byte to be read.
*
*
* @return Status of DS1307_ReadByteRAM.
*
*
* @author Manuel Caballero
* @date 31/July/2018
* @version 31/July/2018 The ORIGIN
* @pre N/A.
* @warning N/A.
*/
DS1307::DS1307_status_t DS1307::DS1307_ReadByteRAM ( uint8_t* myByte, uint8_t myAddress )
{
char cmd = 0;
uint32_t aux;
/* Check RAM memory limits */
if ( ( myAddress >= 0x08 ) && ( myAddress <= 0x3F ) ) {
/* Read data from the RAM memory */
cmd = myAddress;
aux = _i2c.write ( _DS1307_Addr, &cmd, 1U, true );
aux = _i2c.read ( _DS1307_Addr, (char*)myByte, 1U );
} else {
return DS1307_FAILURE;
}
if ( aux == I2C_SUCCESS ) {
return DS1307_SUCCESS;
} else {
return DS1307_FAILURE;
}
}
/**
* @brief DS1307_EraseByteRAM ( uint8_t )
*
* @details It ereases a byte into the RAM memory.
*
* @param[in] myAddress: Address to write the byte.
*
* @param[out] N/A
*
*
* @return Status of DS1307_EraseByteRAM.
*
*
* @author Manuel Caballero
* @date 31/July/2018
* @version 31/July/2018 The ORIGIN
* @pre N/A.
* @warning N/A.
*/
DS1307::DS1307_status_t DS1307::DS1307_EraseByteRAM ( uint8_t myAddress )
{
char cmd[] = { 0, 0 };
uint32_t aux;
/* Check RAM memory limits */
if ( ( myAddress >= 0x08 ) && ( myAddress <= 0x3F ) ) {
/* Write data into the RAM memory */
cmd[0] = myAddress;
cmd[1] = 0xFF;
aux = _i2c.write ( _DS1307_Addr, &cmd[0], sizeof( cmd )/sizeof( cmd[0] ), false );
} else {
return DS1307_FAILURE;
}
if ( aux == I2C_SUCCESS )
{
return DS1307_SUCCESS;
}
else
{
return DS1307_FAILURE;
}
}