diff options
Diffstat (limited to 'lib/lufa/Projects/TempDataLogger/Lib/RTC.c')
| -rw-r--r-- | lib/lufa/Projects/TempDataLogger/Lib/RTC.c | 159 | 
1 files changed, 159 insertions, 0 deletions
| diff --git a/lib/lufa/Projects/TempDataLogger/Lib/RTC.c b/lib/lufa/Projects/TempDataLogger/Lib/RTC.c new file mode 100644 index 0000000000..a5291eaf3c --- /dev/null +++ b/lib/lufa/Projects/TempDataLogger/Lib/RTC.c @@ -0,0 +1,159 @@ +/* +     Copyright (C) Dean Camera, 2017. + +  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 | 
