Problem with pic program [SOLVED].

[Eraser]

void interrupt my_isr(void)

I built this program, in c , this is a led pingpong, on pic 16f877a, but the program doesnt work 100%, the leds move for one side and dont return, and i dont know why.
Can anyone help me???

the program is :


#include <htc.h>

int direction=0;

__CONFIG(XT & WDTDIS & PWRTDIS & BORDIS & LVPEN & WRTEN & DEBUGDIS & DUNPROT & UNPROTECT);


void inittimer0(void)
{
T0CS=0;
T0SE=0;
PSA=0;
PS2=1;
PS1=1;
PS0=1;
TMR0=0;
}

void initporto(void)
{
TRISD=0;
PORTD=0;
RD7=1;
}


void interrupcoes(void)
{
T0IF=0;
T0IE=1;
GIE=1;
}


void main(void)
{
inittimer0();
initporto();
interrupcoes();

while (1)
{

}
}


void interrupt my_isr(void)
{

if (direction==0)
{
T0IF=0;
PORTD=PORTD*10;
if (RD0==1)
{
direction=1;
}
}
else
{
T0IF=0;
PORTD=PORTD/10;
if (RD7==1)
{
direction=0;
}
}
}

 

[xxtigerxx]

Problem with pic program.

can u give us the schematic?

 

[Eraser]

Re: Problem with pic program.

can u give us the schematic?

The problem its not hardware, because i made the same program in assembley, and work,im learning c so i am a roockie.lol

thanks.

 

[FvM]

Problem with pic program.

I don't see which bit pattern is intended or how PORTD=PORTD*10 respectively PORTD=PORTD/10 can generate a useful pattern.

 

[Eraser]

Re: Problem with pic program.

I have tried put portd=portd>>1 and portd=portd<<1, and the result its the same.

 

[waseem]

Re: Problem with pic program.

Hi!
I have tested this code in proteus. It works fine. So test this on ur hardware.
I hope this will be successfull.
Regards.

#include <htc.h>

__CONFIG(XT & WDTDIS & PWRTDIS & BORDIS & LVPEN & WRTEN & DEBUGDIS & DUNPROT & UNPROTECT);

int direction=0;
void inittimer0(void)
{
T0CS=0;
T0SE=0;
PSA=0;
PS2=1;
PS1=1;
PS0=1;
TMR0=0;
}

void initporto(void)
{
TRISD=0;
PORTD=0;
RD7=1;
}


void interrupcoes(void)
{
T0IF=0;
T0IE=1;
GIE=1;
}


void main(void)
{
inittimer0();
initporto();
interrupcoes();

while (1)
{

}
}


void interrupt my_isr(void)
{

if (direction==0)
{
T0IF=0;
PORTD=PORTD>>1;
if (RD0==1)
{
direction=1;
}
}
else
{
T0IF=0;
PORTD=PORTD<<1;
if (RD7==1)
{
direction=0;
}
}
}

 

[FvM]

Problem with pic program.

At least, the code looks meaningful now.

 

[Eraser]

Re: Problem with pic program.

sorry for my ignorance, but what is the proteus?

 

[FvM]

Problem with pic program.

sorry for my ignorance, but what is the proteus?

A popular simulator.

 

[Simpaltechnologies]

Problem with pic program.

ohh

PORTD=PORTD<<1; ???

don't do this way

use a variable to shift in PORT

for example:

unsigned char c=80;


PORTD=c>>i;


Pallav Aggarwal
Simpaltechnologies,India

 

[Eraser]

Re: Problem with pic program.

The program already works. Thanks.

 

[namqn]

Re: Problem with pic program.

The program already works. Thanks.

Could you please edit the topic to read "Problem with pic program [SOLVED]"? This would help prevent people from reading through the whole thread just to realize that there is now no problems to solve. Thank you.

Cheers,

 

[Eraser]

Re: Problem with pic program.

The program already works. Thanks.

Could you please edit the topic to read "Problem with pic program [SOLVED]"? This would help prevent people from reading through the whole thread just to realize that there is now no problems to solve. Thank you.

Cheers,

Ok no problem.