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/*
Copyright (C) Dean Camera, 2011.
dean [at] fourwalledcubicle [dot] com
www.lufa-lib.org
*/
#include "DS1307.h"
void DS1307_SetTimeDate(const TimeDate_t* NewTimeDate)
{
#if defined(DUMMY_RTC)
return;
#endif
DS1307_DateTimeRegs_t NewRegValues;
// Convert new time data to the DS1307's time register layout
NewRegValues.Byte1.Fields.TenSec = (NewTimeDate->Second / 10);
NewRegValues.Byte1.Fields.Sec = (NewTimeDate->Second % 10);
NewRegValues.Byte1.Fields.CH = false;
NewRegValues.Byte2.Fields.TenMin = (NewTimeDate->Minute / 10);
NewRegValues.Byte2.Fields.Min = (NewTimeDate->Minute % 10);
NewRegValues.Byte3.Fields.TenHour = (NewTimeDate->Hour / 10);
NewRegValues.Byte3.Fields.Hour = (NewTimeDate->Hour % 10);
NewRegValues.Byte3.Fields.TwelveHourMode = false;
// Convert new date data to the DS1307's date register layout
NewRegValues.Byte4.Fields.DayOfWeek = 0;
NewRegValues.Byte5.Fields.TenDay = (NewTimeDate->Day / 10);
NewRegValues.Byte5.Fields.Day = (NewTimeDate->Day % 10);
NewRegValues.Byte6.Fields.TenMonth = (NewTimeDate->Month / 10);
NewRegValues.Byte6.Fields.Month = (NewTimeDate->Month % 10);
NewRegValues.Byte7.Fields.TenYear = (NewTimeDate->Year / 10);
NewRegValues.Byte7.Fields.Year = (NewTimeDate->Year % 10);
if (TWI_StartTransmission(DS1307_ADDRESS_WRITE, 10))
{
// Must start writing to the first address within the device
TWI_SendByte(0);
// Write time data to the first set of device registers
TWI_SendByte(NewRegValues.Byte1.IntVal);
TWI_SendByte(NewRegValues.Byte2.IntVal);
TWI_SendByte(NewRegValues.Byte3.IntVal);
// Write date data to the second set of device registers
TWI_SendByte(NewRegValues.Byte4.IntVal);
TWI_SendByte(NewRegValues.Byte5.IntVal);
TWI_SendByte(NewRegValues.Byte6.IntVal);
TWI_SendByte(NewRegValues.Byte7.IntVal);
TWI_StopTransmission();
}
}
void DS1307_GetTimeDate(TimeDate_t* const TimeDate)
{
#if defined(DUMMY_RTC)
TimeDate->Hour = 1;
TimeDate->Minute = 1;
TimeDate->Second = 1;
TimeDate->Day = 1;
TimeDate->Month = 1;
TimeDate->Year = 1;
return;
#endif
if (TWI_StartTransmission(DS1307_ADDRESS_WRITE, 10))
{
// Must start reading from the first address within the device
TWI_SendByte(0);
TWI_StopTransmission();
}
DS1307_DateTimeRegs_t CurrentRegValues;
if (TWI_StartTransmission(DS1307_ADDRESS_READ, 10))
{
// First set of registers store the current time
TWI_ReceiveByte(&CurrentRegValues.Byte1.IntVal, false);
TWI_ReceiveByte(&CurrentRegValues.Byte2.IntVal, false);
TWI_ReceiveByte(&CurrentRegValues.Byte3.IntVal, false);
// Second set of registers store the current date
TWI_ReceiveByte(&CurrentRegValues.Byte4.IntVal, false);
TWI_ReceiveByte(&CurrentRegValues.Byte5.IntVal, false);
TWI_ReceiveByte(&CurrentRegValues.Byte6.IntVal, false);
TWI_ReceiveByte(&CurrentRegValues.Byte7.IntVal, true);
TWI_StopTransmission();
}
// Convert stored time value into decimal
TimeDate->Second = (CurrentRegValues.Byte1.Fields.TenSec * 10) + CurrentRegValues.Byte1.Fields.Sec;
TimeDate->Minute = (CurrentRegValues.Byte2.Fields.TenMin * 10) + CurrentRegValues.Byte2.Fields.Min;
TimeDate->Hour = (CurrentRegValues.Byte3.Fields.TenHour * 10) + CurrentRegValues.Byte3.Fields.Hour;
// Convert stored date value into decimal
TimeDate->Day = (CurrentRegValues.Byte5.Fields.TenDay * 10) + CurrentRegValues.Byte5.Fields.Day;
TimeDate->Month = (CurrentRegValues.Byte6.Fields.TenMonth * 10) + CurrentRegValues.Byte6.Fields.Month;
TimeDate->Year = (CurrentRegValues.Byte7.Fields.TenYear * 10) + CurrentRegValues.Byte7.Fields.Year;
}
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