Problem in Timer2 of PIC16F877 using hi-tech C

[ecaits]

Dear Friends,

I am working on TImer 2 of PIC16F877.

Code is given below.

---

Code C - [expand]
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void main()
{
    TRISB0 = 0;
    RB0 = 0;
    inittimer2();
 
    while(1)
    {
    }
}
 
void inittimer2(void)
{   
    TMR2 = 0x00;
    T2CON = 0x75;  // Prescaler 4, Postscaler 
    TMR2IF = 0;
    TMR2IE = 1;
    PR2 = 0xFF;
    
}
 
void interrupt ISR(void)
{
    if(TMR2IF)
    {
        RB0=~RB0;
        TMR2IF=0;
    }
}

---

But this code is not working.
Can anybody suggest what may be the problem???

 

[Allen6502]

You have to enable the Global Interrupt GIE.

Allen

 

[PA3040]

GIE ( Global interrupt enable )must be enabled

 

[sarge]

PEIE also have to be enabled.

 

[PA3040]

Yes Both PEIE and GIE

 

[paulfjujo]

As allready said in previous post,
if you add PEIE et GIE bit, your code (interrupt) is working

  Init_Timer2() ;
  PEIE_bit=1;
  GIE_bit=1;

but if your FOSC or Quartz value..
is too high you can't see blinking of the led...

blinking detection ok at 10Mhz ,even not very evident
At 20Mhz not sure..
at 4MHz must be evident.