Minor documentation improvements.

[pub/USBasp.git] / Projects / TempDataLogger / Lib / DS1307.c

diff --git a/Projects/TempDataLogger/Lib/DS1307.c b/Projects/TempDataLogger/Lib/DS1307.c
index edbb272..459030f 100644 (file)
--- a/Projects/TempDataLogger/Lib/DS1307.c
+++ b/Projects/TempDataLogger/Lib/DS1307.c
@@ -1,5 +1,5 @@
 /*
 /*

-     Copyright (C) Dean Camera, 2011.
+     Copyright (C) Dean Camera, 2012.

 
   dean [at] fourwalledcubicle [dot] com
            www.lufa-lib.org
 
   dean [at] fourwalledcubicle [dot] com
            www.lufa-lib.org


@@ -7,99 +7,78 @@
 
 #include "DS1307.h"
 
 
 #include "DS1307.h"
 

-void DS1307_SetTimeDate(const TimeDate_t* NewTimeDate)
+bool DS1307_SetTimeDate(const TimeDate_t* NewTimeDate)

 {
 #if defined(DUMMY_RTC)
 {
 #if defined(DUMMY_RTC)

-       return;
+       return true;

 #endif
 
 #endif
 

-       DS1307_TimeRegs_t CurrentRTCTime;
-       DS1307_DateRegs_t CurrentRTCDate;
+       DS1307_DateTimeRegs_t NewRegValues;
+       const uint8_t         WriteAddress = 0;

 
        // Convert new time data to the DS1307's time register layout
 
        // 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;
+       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
 
        // 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))
+       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)

        {
        {

-               // 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();
+               return false;

        }
        }

+
+       return true;

 }
 
 }
 

-void DS1307_GetTimeDate(TimeDate_t* const TimeDate)
+bool DS1307_GetTimeDate(TimeDate_t* const TimeDate)

 {
 #if defined(DUMMY_RTC)
        TimeDate->Hour   = 1;
        TimeDate->Minute = 1;
        TimeDate->Second = 1;
 {
 #if defined(DUMMY_RTC)
        TimeDate->Hour   = 1;
        TimeDate->Minute = 1;
        TimeDate->Second = 1;

-       
+

        TimeDate->Day    = 1;
        TimeDate->Month  = 1;
        TimeDate->Year   = 1;
        TimeDate->Day    = 1;
        TimeDate->Month  = 1;
        TimeDate->Year   = 1;

-       
-       return;
+
+       return true;

 #endif
 
 #endif
 

-       if (TWI_StartTransmission(DS1307_ADDRESS_WRITE, 10))
-       {
-               // Must start reading from the first address within the device
-               TWI_SendByte(0);
-               TWI_StopTransmission();
-       }
+       DS1307_DateTimeRegs_t CurrentRegValues;
+       const uint8_t         ReadAddress = 0;

 
 

-       DS1307_TimeRegs_t CurrentRTCTime;
-       DS1307_DateRegs_t CurrentRTCDate;
-       
-       if (TWI_StartTransmission(DS1307_ADDRESS_READ, 10))
+       // 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)

        {
        {

-               // 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();
+               return false;

        }
 
        // Convert stored time value into decimal
        }
 
        // 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;
+       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
 
        // 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;
+       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;

 }
 
 }