added tag. -Bob

On Sat, Jun 22, 2013, at 11:42 AM, mircea2012 wrote:
> Hy.=20
> In this program i try to test compare mode using pic16f88.
> I am not quite sure if it is OK but the code is working.
> I set an output RB0 for 1 sec (led is ON), after that i reset that output
> RB0 (led is OFF) for 1 sec.
> >From my calculations : f =3D 4MHz / (4 * 8 * 65536) =3D 2Hz
> T =3D 1 / 2Hz =3D 0,5 which means that the led is on twice per sec.
> But in program i use variable counter to increase the delay, so led is on
> for 1 sec and off - 1 sec.
>=20
>=20
> #include <system.h>
>=20
> #pragma DATA _CONFIG1, _EXTRC_CLKOUT & _WDT_OFF & _LVP_OFF
>=20
> unsigned int counter =3D 0;
>=20
> void interrupt()=20
> {   =20
>      if((pir1 & 0x01) && (pir1 & 0x04))
>      {                     =20
>           clear_bit(pir1, 0);
>           clear_bit(pir1, 2);
>           counter++;
>           if(counter =3D=3D 2)
>           {
> 		 ccp1con =3D 0b00001001;
> 	  }
> 	  else if(counter =3D=3D 4)
> 	  {
> 	         ccp1con =3D 0b00001000;
> 	         counter =3D 0;
> 	  }
>      }            =20
> }
>=20
> void main()
> {
> 	trisb =3D 0xf0;
> 	portb =3D 0x00;
> 	tmr1h =3D 0;
> 	tmr1l =3D 0;
> 	ccpr1l =3D 0x60;
> 	ccpr1h =3D 0xea;
> 	cmcon =3D 0x07;
> 	t1con =3D 0b00110001;  // prescaler =3D 8
> 	intcon =3D 0b11000000;
> 	pie1 =3D 0b00000101;
> 	ccp1con =3D 0b00001000;
> 	while(1)
> 	{
> =09
> 	}=20
> }
>=20

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