Rename DS1307 driver files to a more generic RTC, as different RTC drivers may be...

[pub/lufa.git] / Projects / TempDataLogger / Lib / RTC.c

diff --git a/Projects/TempDataLogger/Lib/RTC.c b/Projects/TempDataLogger/Lib/RTC.c
new file mode 100644 (file)
index 0000000..00c8baf
--- /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