timestamp.h

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#ifndef TIMESTAMP_h
#define TIMESTAMP_h
 
//-----------------------------------------------------------------------------
//  Includes
//-----------------------------------------------------------------------------
#include <stdbool.h>
#include <stdint.h>
#include "cmsis_compiler.h"
 
//-----------------------------------------------------------------------------
//  Defines
//-----------------------------------------------------------------------------
 
typedef __PACKED_STRUCT
{
    uint32_t ui32Seconds; 
    uint32_t ui32NanoSeconds; 
}Type_Timestamp;
 
typedef __PACKED_STRUCT
{
    int32_t i32Year;
    int32_t i32Month;
    int32_t i32Day;
    int32_t i32Hour;
    int32_t i32Minute;
    int32_t i32Second;
}Type_DateTime;
 
//-----------------------------------------------------------------------------
//  Function Prototypes
//-----------------------------------------------------------------------------
/* Declare getTimestamp here but implementation is device specific */
Type_Timestamp getTimestamp(void);
uint32_t DateTimeToUtc(Type_DateTime tDateTime);
Type_DateTime UtcToDateTime(uint32_t UnixTime);
 
//-----------------------------------------------------------------------------
//  Function bodies
//-----------------------------------------------------------------------------
 
/* Function inlining is only possible within the same module (C-File). 
   By placing them in the header and define as static we can workaround this */
 
 
__INLINE static bool TimestampOlder(Type_Timestamp tTimestamp1, Type_Timestamp tTimestamp2)
{
    if (tTimestamp1.ui32Seconds < tTimestamp2.ui32Seconds)
        return true;
 
    if (tTimestamp1.ui32Seconds > tTimestamp2.ui32Seconds)
        return false;
    
    if (tTimestamp1.ui32NanoSeconds < tTimestamp2.ui32NanoSeconds)
        return true;
 
    return false;
}
 
 
__INLINE static Type_Timestamp TimestampDifference(Type_Timestamp tTimestamp1, Type_Timestamp tTimestamp2)
{
    Type_Timestamp tDiff;
    int32_t i32DiffNanoseconds;
    
    tDiff.ui32Seconds  = tTimestamp1.ui32Seconds     - tTimestamp2.ui32Seconds;
    i32DiffNanoseconds = tTimestamp1.ui32NanoSeconds - tTimestamp2.ui32NanoSeconds;
    
    if (i32DiffNanoseconds < 0)
    {
        //Signum Correction Nanoseconds             
        tDiff.ui32Seconds -= 1;
        tDiff.ui32NanoSeconds = i32DiffNanoseconds + 1000000000;
    }
    else
    {
        tDiff.ui32NanoSeconds = i32DiffNanoseconds;
    }
    return tDiff;
}
 
#endif // TIMESTAMP_h