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Diffstat (limited to 'Projects/TempDataLogger/Lib/RTC.c')
| -rw-r--r-- | Projects/TempDataLogger/Lib/RTC.c | 159 |
1 files changed, 159 insertions, 0 deletions
diff --git a/Projects/TempDataLogger/Lib/RTC.c b/Projects/TempDataLogger/Lib/RTC.c new file mode 100644 index 000000000..00c8baf9b --- /dev/null +++ b/Projects/TempDataLogger/Lib/RTC.c @@ -0,0 +1,159 @@ +/* + Copyright (C) Dean Camera, 2013. + + dean [at] fourwalledcubicle [dot] com + www.lufa-lib.org +*/ + +#include "RTC.h" + +#if defined(DUMMY_RTC) + +/** Current dummy RTC time and date */ +static volatile TimeDate_t DummyRTC_Count; + +void RTC_Init(void) +{ + DummyRTC_Count.Hour = 0; + DummyRTC_Count.Minute = 0; + DummyRTC_Count.Second = 0; + DummyRTC_Count.Day = 1; + DummyRTC_Count.Month = 1; + DummyRTC_Count.Year = 00; +} + +void RTC_Tick500ms(void) +{ + static bool HalfSecondElapsed = false; + + HalfSecondElapsed = !HalfSecondElapsed; + if (HalfSecondElapsed == false) + return; + + if (++DummyRTC_Count.Second < 60) + return; + + DummyRTC_Count.Second = 0; + + if (++DummyRTC_Count.Minute < 60) + return; + + DummyRTC_Count.Minute = 0; + + if (++DummyRTC_Count.Hour < 24) + return; + + DummyRTC_Count.Hour = 0; + + static const char MonthLength[12] = {31, 28, 31, 30, 31, 30, 31, 31, 30, 31, 30, 31}; + uint8_t DaysInMonth = MonthLength[DummyRTC_Count.Month - 1]; + + /* Check if we need to account for a leap year */ + if ((DummyRTC_Count.Month == 2) && + ((!(DummyRTC_Count.Year % 400)) || ((DummyRTC_Count.Year % 100) && !(DummyRTC_Count.Year % 4)))) + { + DaysInMonth++; + } + + if (++DummyRTC_Count.Day <= DaysInMonth) + return; + + DummyRTC_Count.Day = 1; + + if (++DummyRTC_Count.Month <= 12) + return; + + DummyRTC_Count.Month = 1; + DummyRTC_Count.Year++; +} + +bool RTC_SetTimeDate(const TimeDate_t* NewTimeDate) +{ + GlobalInterruptDisable(); + DummyRTC_Count = *NewTimeDate; + GlobalInterruptEnable(); + + return true; +} + +bool RTC_GetTimeDate(TimeDate_t* const TimeDate) +{ + GlobalInterruptDisable(); + *TimeDate = DummyRTC_Count; + GlobalInterruptEnable(); + + return true; +} + +#else + +void RTC_Init(void) +{ + /* Unused for a real external DS1307 RTC device */ +} + +void RTC_Tick500ms(void) +{ + /* Unused for a real external DS1307 RTC device */ +} + +bool RTC_SetTimeDate(const TimeDate_t* NewTimeDate) +{ + DS1307_DateTimeRegs_t NewRegValues; + const uint8_t WriteAddress = 0; + + // 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); + + // Write the new Time and Date into the DS1307 + if (TWI_WritePacket(DS1307_ADDRESS, 10, &WriteAddress, sizeof(WriteAddress), + (uint8_t*)&NewRegValues, sizeof(DS1307_DateTimeRegs_t)) != TWI_ERROR_NoError) + { + return false; + } + + return true; +} + +bool RTC_GetTimeDate(TimeDate_t* const TimeDate) +{ + DS1307_DateTimeRegs_t CurrentRegValues; + const uint8_t ReadAddress = 0; + + // Read in the stored Time and Date from the DS1307 + if (TWI_ReadPacket(DS1307_ADDRESS, 10, &ReadAddress, sizeof(ReadAddress), + (uint8_t*)&CurrentRegValues, sizeof(DS1307_DateTimeRegs_t)) != TWI_ERROR_NoError) + { + return false; + } + + // 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; + + return true; +} + +#endif |