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problem with timer..


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electronicfreak

Wed Jun 25 2008, 02:39AM

Registered Member #7958

Joined: Tue May 20 2008, 04:48PM

Posts: 19
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hi friends,
i m facing aproblem with timer ...

CODE:

void check_button();

void OFF();

//unsigned char 

void inti_m();

unsigned short SECOND,cnt,minu,h,m;

int*MINUTE=1,HOUR=0,oldstate;

void min_init();

//void 

void interrupt()

{

cnt++ ;

PIR1.TMR1IF = 0; // clear TMR1IF 

TMR1H = 0x0B;

TMR1L = 0xF7;

if (cnt == 2) { // if cnt is 76 

SECOND++;

cnt = 0; // reset cnt 

if (SECOND==60)

{

SECOND=0; //reset SECOND 

// m++; 

// if(m==1) 

// { m=0; 

min_init() ; //GO TO min_init() function 

//PORTB =~PORTB; 

// } 

}

}

}

void main()

{

inti_m();

check_button();

do{

if(PORTB.F0==0)

{check_button();

}

else if (PORTB.F0==1)

{

OFF();

}

}

while(1);

}

void inti_m()

{

//OPTION=0x40; 

TRISB=0x00;

TRISC=0xFF;

PORTB=0xF0;

//PORTC=0x00; 

TMR1H = 0x0B; // Initialize Timer1 register 

TMR1L = 0xFD;

cnt = 0; // initialize cnt 

INTCON = 0xC0; // Set GIE, PEIE 

//PORTB = 0xF0; // Initialize PORTB 

SECOND=0;

m=0;

minu=0;

}

void check_button()

{

for(;;)

{

if (PORTC.F0==1)

{ // Delay_ms(10); 

// if(PORTB==0){ 

//if ( Button(&PORTB, 0, 1, 0)) { 

PORTB.F0=1;

PIE1.TMR1IE = 1; // enable Timer1 interrupt 

T1CON.T1CKPS1=1;

T1CON.T1CKPS0=1;

T1CON.T1OSCEN=1;

T1CON.TMR1ON = 1; // Timer1 settings 

PIR1.TMR1IF = 0; // clear TMR1IF 

/*}

else

{

OFF();

} */

break;

}

}

}

void min_init()

{

minu++;

if (minu>=MINUTE)

{ minu=0;

PORTB.F0 =0;

T1CON = 0;

}

// return 0; 

}

void OFF()

{if(PORTC.F0==1)

{ PORTB=0;

T1CON = 0;

//INTCON.RBIF=0; 

}

}

this is the programm for the 1min timer , operated when key is pressed.
it works fine ..... i m using mikro c compiler.....
but my problem is that after timer starts in between key is pressed microcontroller should be reset.....
or itshould go to the OFF () function and exicute it............
please any budy help me..............

[ Edited Wed Jun 25 2008, 11:20PM ]

SACHIN
http://belgaum.myminicity.com/

Ajay

Wed Jun 25 2008, 11:39PM

Rickey's World Admin

Registered Member #1

Joined: Fri Feb 24 2006, 04:56AM

Posts: 3375
Thanked 617 times in 584 posts

are you sure its working fine?

try this small change in main program..

CODE:

while(1){

     while(PORTB.F0==0); //Wait for keypress

     check_button();   //Keypressed start timer

     while(PORTB.F0);     //Wait for release

     while(PORTB.F0==0); //wait for keypress again

     OFF();       //key pressed stop timer

     while(PORTB.F0); //wait for release

}

I hope this is what you wanted

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electronicfreak

Thu Jun 26 2008, 08:59PM

Registered Member #7958

Joined: Tue May 20 2008, 04:48PM

Posts: 19
Thanked 0 times in 0 posts

Ajay wrote ...

are you sure its working fine?

try this small change in main program..

CODE:

while(1){

     while(PORTB.F0==0); //Wait for keypress

     check_button();   //Keypressed start timer

     while(PORTB.F0);     //Wait for release

     while(PORTB.F0==0); //wait for keypress again

     OFF();       //key pressed stop timer

     while(PORTB.F0); //wait for release

}

I hope this is what you wanted

sir , my problem is that portB is zero when key is pressed timer starts , when it complete the given time timer reset, at that time key is pressed it works fine............
when timer is running in between key is pressed it won't take it , untill unless specified time will exicute .............
but software works fine..........
above mentioned problem occurs only when i burn hex to uC .

SACHIN
http://belgaum.myminicity.com/