/*****************************************************************************
Function:
DWORD TickGet(void)
Summary:
Obtains the current Tick value.
Description:
This function retrieves the current Tick value, allowing timing and
measurement code to be written in a non-blocking fashion. This function
retrieves the least significant 32 bits of the internal tick counter,
and is useful for measuring time increments ranging from a few
microseconds to a few hours. Use TickGetDiv256 or TickGetDiv64K for
longer periods of time.
Precondition:
None
Parameters:
None
Returns:
Lower 32 bits of the current Tick value.
***************************************************************************/
DWORD TickGet(void)
{
DWORD dw;
GetTickCopy();
((BYTE*)&dw)[0] = vTickReading[0]; // Note: This copy must be done one
((BYTE*)&dw)[1] = vTickReading[1]; // byte at a time to prevent misaligned
((BYTE*)&dw)[2] = vTickReading[2]; // memory reads, which will reset the PIC.
((BYTE*)&dw)[3] = vTickReading[3];
return dw;
}
DWORD TickGetDiv64K(void) {
DWORD_VAL ret;
GetTickCopy();
ret.v[0] = vTickReading[2]; // Note: This copy must be done one
ret.v[1] = vTickReading[3]; // byte at a time to prevent misaligned
ret.v[2] = vTickReading[4]; // memory reads, which will reset the PIC.
ret.v[3] = vTickReading[5];
return ret.Val;
}
int GetTickInSeconds(DWORD * Seconds, WORD * Milliseconds)
{
volatile DWORD S = 0;
volatile DWORD m = 0;
GetTickCopy();
S = *((DWORD*)&vTickReading[2]);
S = S << 1;
m = *((WORD*)&vTickReading[0]);
m *= 1000ul;
m = m / TICKS_PER_SECOND;
if(m >= 1000ul){
S += 1;
m -= 1000ul;
}
*Seconds = S;
*Milliseconds = (WORD)m;
return 0;
}
/*****************************************************************************
Function:
DWORD TickGet(void)
Summary:
Obtains the current Tick value.
Description:
This function retrieves the current Tick value, allowing timing and
measurement code to be written in a non-blocking fashion. This function
retrieves the least significant 32 bits of the internal tick counter,
and is useful for measuring time increments ranging from a few
microseconds to a few hours. Use TickGetDiv256 or TickGetDiv64K for
longer periods of time.
Precondition:
None
Parameters:
None
Returns:
Lower 32 bits of the current Tick value.
***************************************************************************/
DWORD TickGet(void)
{
GetTickCopy();
return *((DWORD*)&vTickReading[0]);
}
