As written your code simply executes once and then does who knows what...

You probably want

for (;;)
{
    if ( BTN1 =3D=3D 0 )
    {
        PORT =3D ~PORT
    }
}

----- Original Message -----=20
From: "Yigit Turgut" <y.turgut@gmail.com>
To: "Microcontroller discussion list - Public." <piclist@mit.edu>
Sent: Monday, October 24, 2011 12:01 PM
Subject: [PIC] Pushbutton Trigger


> Hi all,
>=20
> /*
> sbit BTN1 at RB1_bit;
> sbit PROT at RB2_bit;
> sbit  TEST at RB3_bit;
>=20
> void main() {
>=20
> TRISB =3D  00001110;
> PORTB =3D 00001010;
> PROT =3D 0;
>=20
> if( BTN1 =3D=3D  0){
> PROT =3D ~PROT } */
>=20
> BTN1 is active high and when pressed it shorts the pin to ground. But
> when I run the test code above, PROT converts into its complement even
> if the button is not pressed. Also when I type if(BTN1 !=3D 1) instead
> of if(BTN1 =3D=3D 0), all logic levels are drawn to low, not responsive.
> It's a very annoying thing, has anyone encountered such a behavior ?
> --=20
> http://www.piclist.com PIC/SX FAQ & list archive
> View/change your membership options at
> http://mailman.mit.edu/mailman/listinfo/piclist
--=20
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