bit Flag_10mS=0, Flag_100mS=0, Flag_1Sec=0; // Timer Flags
unsigned char Count100mS=0, Count1Sec=0,Count1Min=0 ;// Time counters
/***************************************************
* INTERRUPT SERVICE ROUTINE *
***************************************************/
void interrupt isr( void )
{
if ( TMR1IF && TMR1IE ) // Timer1 overflow event occurred, set to 1mSec?
{
Flag_10mS = 1;
TMR1L = 0xEF; // Initialize Timer1 low byte
TMR1H = 0xD8; // initialize Timer1 high byte 1mSec
TMR1IF=0; // Clear TMR1 Interrupt Flag
Count100mS++; // counter for 100mS
if ( Count100mS >= 10 ) // counter for 100mS
{
Flag_100mS = 1;
Count100mS = 0 ; // Reset counter
Count1Sec++;
}
if ( Count1Sec >= 10 ) // Counter for 1 sec
{
Flag_1Sec = 1;
Count1Sec = 0 ; // Reset counter
}
}
}
/******************************
* Timer1 initialization code *
******************************/
void Init_Timer1( void )
{
T1CON = 0x00; // T1CON register setup
TMR1L = 0xEF; // Initialize Timer1 low byte
TMR1H = 0xD8; // initialize Timer1 high byte 10mSec
TMR1IF = 0; // Reset Timer1 Overflow H/W flag
TMR1IE = 1; // Enable Timer1 Overflow interrupt
TMR1ON = 1; // Start Timer1 counter
}
/***********************************************
* INITIALIZE SYSTEM *
***********************************************/
void main(void)
{
Init_Timer1(); // Initialize Timer1
PEIE = 1; // Enable Peripheral Interrupts
GIE = 1; // Enable Global Interrupts
while(1)
{
// ************** 10mSec Function *****************
if ( Flag_10mS ) // Functions to run at 10mSec
{
Flag_10mS = 0 ;
....
}//End 10mSec
// ************** 100mSec Function *****************
if ( Flag_100mS ) // Functions to run at 10mSec
{
Flag_100mS = 0;
....
}
// ************** 1Sec Function *****************
if ( Flag_1Sec ) // Functions to run at 1Sec
{
Count1Min++;
Flag_1Sec = 0 ;
...
}// End 1Sec
// ************** 1Min Function *****************
if ( Count1Min >= 60 ) // 1 Minute passed )
{
Count1Min = 0 ;
...
}//End 1 Min
}//End while
}//End main
