Squashed 'tmk_core/' changes from caca2c0..dc0e46e

dc0e46e Rename LUFA to LUFA-git
3bfa7fa Remove LUFA-120730
215b764 Merge commit 'afa0f22a9299686fd88f58ce09c5b521ac917e8f' as 'protocol/lufa/LUFA'
afa0f22 Squashed 'protocol/lufa/LUFA/' content from commit def7fca
c0c42fa Remove submodule of LUFA
30f897d Merge commit '87ced33feb74e79c3281dda36eb6d6d153399b41' as 'protocol/usb_hid/USB_Host_Shield_2.0'
87ced33 Squashed 'protocol/usb_hid/USB_Host_Shield_2.0/' content from commit aab4a69
14f6d49 Remove submodule of USB_Host_Shield_2.0

git-subtree-dir: tmk_core
git-subtree-split: dc0e46eaa4367d4e218f8816e3c117895820f07c

protocol/lufa/LUFA-git/Projects/TempDataLogger/Lib/RTC.c

@@ -0,0 +1,159 @@
+/*
+     Copyright (C) Dean Camera, 2014.
+
+  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