Dear sir:

CORRECTIONS :

the functions FUNCTION1( )  AND FUNCTION( ) ARE SAME.

#PRAGMA INTRRUPT timer_rb    

void timer_rb(void)          // VECTOR TABLE

{

// calling  ISR FROM HERE

}

THANKS

//TIMER B INTRRUPT         IN INTRT.C

VOID TIMER_RB(VOID)             //VECTOR = 24

{

      TIMERB_ISR( ) 

}

VOID TIMERB_ISR(VOID) AT MAIN.C  , WHICH CONTAINS INCREMENT OF "VARIABLE " ,

WHEN COUNT REACHES 100  IN VARIABLE, THE FUNCTION( ) IS CALLED .  THIS WORKS FINE , FOR FIRST TIME AFTER RESET .

iF NOW THE SENSOR1 ==1 , TIMERB AGAIN STARTS COUNTING FOR 25MSEC , UNTILL VARIABLE = 100 ;  THIS IS NOT HAPPENING FOR SECOND TIME .CONTROL IS NOT GOING TO VOID TIMER_RB(VOID). //VECTOR = 24  // WHICH IS AT INTRT.C .

INTIALLY AFTER RESET THINGS ARE WORKING FINE,

AFTER 25MILLI SEC

THE SOFTWARE SWITCHES TO TIMER B ISR ,

INCREMENTS THE VARIABLE FROM ZERO TO 100,

AFTER COMPARING , SOFTWARE BRANCHES TO MAIN FUNCTION TO RESTART ALL OPERATION.

I CANT COMPARE VARIABLE = 100 AT MAIN FUNCTION ,BECAUSE  CONTROLLER IS PARALLELY EXECUTING CODES FOR OTHER OPERATIONS.

NOW, IF AGAIN THE TIMER B IS STARTED , THE SOFTWARE WILL NOT BRANCHES  TO  ISR .,

WHY THIS IS HAPPENING. IS THERE ANY SETTINGS OR MEMORY OVERLAP OR SP ADDRESS IS INVALID.

the software is not going to intrrupt service routine for second time , after i compare the variable ==100 and get back to main function .

then sir; how can i  BRANCH TO FUNCTION1 ( ) , FROM ISR;

///iTRRUPT ISR

{

VARIABLE ++

          IF ( VARIABLE ==100)

                FUNCTION 2( )

}

FUNCTION 2( )

{

        FUNCTION1( )

}