/* 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_TimeRegs_t CurrentRTCTime; DS1307_DateRegs_t CurrentRTCDate; // Convert new time data to the DS1307's time register layout CurrentRTCTime.Byte1.Fields.TenSec = (NewTimeDate->Second / 10); CurrentRTCTime.Byte1.Fields.Sec = (NewTimeDate->Second % 10); CurrentRTCTime.Byte1.Fields.CH = false; CurrentRTCTime.Byte2.Fields.TenMin = (NewTimeDate->Minute / 10); CurrentRTCTime.Byte2.Fields.Min = (NewTimeDate->Minute % 10); CurrentRTCTime.Byte3.Fields.TenHour = (NewTimeDate->Hour / 10); CurrentRTCTime.Byte3.Fields.Hour = (NewTimeDate->Hour % 10); CurrentRTCTime.Byte3.Fields.TwelveHourMode = false; // Convert new date data to the DS1307's date register layout CurrentRTCDate.Byte1.Fields.TenDay = (NewTimeDate->Day / 10); CurrentRTCDate.Byte1.Fields.Day = (NewTimeDate->Day % 10); CurrentRTCDate.Byte2.Fields.TenMonth = (NewTimeDate->Month / 10); CurrentRTCDate.Byte2.Fields.Month = (NewTimeDate->Month % 10); CurrentRTCDate.Byte3.Fields.TenYear = (NewTimeDate->Year / 10); CurrentRTCDate.Byte3.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(CurrentRTCTime.Byte1.IntVal); TWI_SendByte(CurrentRTCTime.Byte2.IntVal); TWI_SendByte(CurrentRTCTime.Byte3.IntVal); // Write date data to the second set of device registers TWI_SendByte(CurrentRTCDate.Byte1.IntVal); TWI_SendByte(CurrentRTCDate.Byte2.IntVal); TWI_SendByte(CurrentRTCDate.Byte3.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_TimeRegs_t CurrentRTCTime; DS1307_DateRegs_t CurrentRTCDate; if (TWI_StartTransmission(DS1307_ADDRESS_READ, 10)) { // First set of registers store the current time TWI_ReceiveByte(&CurrentRTCTime.Byte1.IntVal, false); TWI_ReceiveByte(&CurrentRTCTime.Byte2.IntVal, false); TWI_ReceiveByte(&CurrentRTCTime.Byte3.IntVal, false); // Second set of registers store the current date TWI_ReceiveByte(&CurrentRTCDate.Byte1.IntVal, false); TWI_ReceiveByte(&CurrentRTCDate.Byte2.IntVal, false); TWI_ReceiveByte(&CurrentRTCDate.Byte3.IntVal, true); TWI_StopTransmission(); } // Convert stored time value into decimal TimeDate->Second = (CurrentRTCTime.Byte1.Fields.TenSec * 10) + CurrentRTCTime.Byte1.Fields.Sec; TimeDate->Minute = (CurrentRTCTime.Byte2.Fields.TenMin * 10) + CurrentRTCTime.Byte2.Fields.Min; TimeDate->Hour = (CurrentRTCTime.Byte3.Fields.TenHour * 10) + CurrentRTCTime.Byte3.Fields.Hour; // Convert stored date value into decimal TimeDate->Day = (CurrentRTCDate.Byte1.Fields.TenDay * 10) + CurrentRTCDate.Byte1.Fields.Day; TimeDate->Month = (CurrentRTCDate.Byte2.Fields.TenMonth * 10) + CurrentRTCDate.Byte2.Fields.Month; TimeDate->Year = (CurrentRTCDate.Byte3.Fields.TenYear * 10) + CurrentRTCDate.Byte3.Fields.Year; }