Took a quick look. It seems in BoostC that the interrupt handler
specifically needs to be a function named interrupt.

www.sourceboost.com/Products/BoostC/Docs/boostc.pdf

Page 64.

Hope this helps.

BAJ

On Sun, Jan 20, 2013 at 11:31:17AM -0500, Byron Jeff wrote:
> Reposted with a [PIC] tag for more visibility.
>=20
> BAJ
>=20
> On Sun, Jan 20, 2013 at 07:45:15AM -0800, mircea2012 wrote:
> Hi all.
> I am new on this site and I have some questions about Pic microcontroller=
s.
> First I am a beginner in Pic microcontroller. I bought a development boar=
d
> from Matrix Multimedia, HP488, but I dont know why I fail with a smalle
> program.
>=20
> The program must flash a led with a delay (4 sec) using TMR0.
> So, from my calculations, using formula :=20
> Freq. out =3D Freq. osc / [prescaler * (256 - TMR0) * count]
> The prescaler is 1 : 256; TMR0 is 0, anf the frequency oscilator is 4Mhz
> (osccon =3D 0b01100000)
> An instruction is executed in 4 clock cycles. So the frequency clock is 4=
Mhz
> / 4 =3D 1Mhz.
> count =3D 61.
> I use sourceBoost IDE, and the compiler is BoostC.
>=20
> Look my code :=20
>=20
>     #include<system.h>=20
>     unsigned int counter =3D 0;=20
>=20
>     void Delay(void)=20
>     {   =20
>       if(intcon & 2)                   // check if TMR0IF is set=20
>        {                     =20
>           clear_bit( intcon, 2 );     // if TMR0IF is set, clear this bit
>           counter =3D counter + 1;      // increments the counter      =20
>           if(counter =3D=3D 61)          =20
>             {
>                counter =3D 0;
>                portb =3D ~portb;        // flash the Led 0 of Port B
>             }
>        }            =20
>     }
>=20
>     void main(void)=20
>     {   =20
>         trisb =3D 0x00;                    // set all pins of Port B as o=
utput
>         portb =3D 0x01;                    // RB0 is high=20
>         tmr0 =3D 0;                        // the value of TMR0 register =
is
> zero.
>         cmcon =3D 0x07;                    // comparators is off.
>         option_reg =3D 0b00000111;         // prescaler is assigned to th=
e
> WDT, prescaler 1:256
>         intcon =3D 0b10100000;             // GIE - enable, TMR0IE - enab=
le
>         while(1)
>         {   }=20
>     }
>=20
> The program compiles fine, upload fine, but dont show me the led flashing=
..
> What I am doing wrong ? Are there any configuration settings that I am no=
t
> aware of ?
>=20
>=20
> --=20
> Byron A. Jeff
> Chair: Department of Computer Science and Information Technology
> College of Information and Mathematical Sciences
> Clayton State University
> http://faculty.clayton.edu/bjeff
> --=20
> http://www.piclist.com PIC/SX FAQ & list archive
> View/change your membership options at
> http://mailman.mit.edu/mailman/listinfo/piclist

--=20
Byron A. Jeff
Chair: Department of Computer Science and Information Technology
College of Information and Mathematical Sciences
Clayton State University
http://faculty.clayton.edu/bjeff
--=20
http://www.piclist.com PIC/SX FAQ & list archive
View/change your membership options at
http://mailman.mit.edu/mailman/listinfo/piclist
.