interrupt.c

AVR单片机C语言程序设计实例精粹

//***************************************************************
// File Name : Interrupt.c
// Author    : Steaven
// Created   : 2008-06-09
// Modified  : 
// Revision  : V0.0
//***************************************************************

#include "app.h"

//global variables definition
INT8U bYear;    //time - year
INT8U bMonth;   //time - month
INT8U bDate;    //time - date
INT8U bHour;    //time - hour
INT8U bMinute;  //time - minute
INT8U bSecond;  //time - second

//***************************************************************
// Function    : sInit_Calendar
// Input       : none
// Output      : none
// Description : Time Initialization,2008-10-29,23:40:45
//***************************************************************
void sInit_Calendar(void)
{
	bYear = 0x08;
	bMonth = 10;
	bDate = 29;
	bHour = 23;
	bMinute = 40;
	bSecond = 45;
}

//***************************************************************
// Function    : Calendar_Update
// Input       : none
// Output      : none
// Description : Update time every one second
//***************************************************************
void Calendar_Update(void)
{	
  	bSecond++; 	
 	if(bSecond >= 60)
  	{
		bSecond = 0;	  		
		bMinute++;		
		if(bMinute >= 60)
	  	{
   		 	bMinute = 0;
	 		bHour++;
		  	if(bHour >= 24)
		  	{
				bHour = 0;
				bDate++;		
				if((bMonth == 4) || (bMonth == 6) || \
				   (bMonth == 9) || (bMonth == 11))
				{
					if(bDate > 30)
					{
						bDate = 1;
						bMonth++;
					}
				}
				else if((bMonth == 1) || (bMonth == 3)  || \
					    (bMonth == 5) || (bMonth == 7)  || \
					    (bMonth == 8) || (bMonth == 10) || \
					    (bMonth == 12))
				{
					if(bDate > 31)
					{
						bDate = 1;
						bMonth++;
					}
				}
				else if(bMonth == 2)
				{
					if(bDate > 28)
					{
						if((bYear % 4) != 0)
						{
							bDate = 1;
							bMonth++;
						}
						else
						{
							if(bDate > 29)
							{
								bDate = 1;
								bMonth++;
							}
						}
					}
				}
				if(bMonth > 12)
				{
					bMonth = 1;
					bYear++;
				}
			}
  		}
  	}
}

//***************************************************************
// Function    : Timer2_Interrupt
// Input       : none
// Output      : none
// Description : Kernel Clock Interrupt Service Routine
//***************************************************************
#pragma interrupt_handler Timer2_Interrupt:4
void Timer2_Interrupt(void)
{
	//Clear Timer2 OCIF Flag
	TIFR  |= 0x80;
    TCNT2 = 0x00;
	//Update Task Status
	OS_Task_Update();
}

//===========================END OF FILE========================//