Problem with PORTB leds on easypic5 (MCU: PIC16F887)

[bobylebob]

pic16f887

Hello everybody,

I have a trouble with my easypic5.

I try to display a text message "coucou" on the board's leds panel.

To display this message, I did the following code:

    char car_b [32] = {0,0,0,0,0,0,0,0,1,1,1,0,1,1,1,0,1,0,1,0,1,1,1,0,1,1,1,0,1,0,1,0};
    char car_c [32] = {0,0,0,0,0,0,0,0,1,0,0,0,1,0,1,0,1,0,1,0,1,0,0,0,1,0,1,0,1,0,1,0};
    char car_d [32] = {0,0,0,0,0,0,0,0,1,1,1,0,1,1,1,0,1,1,1,0,1,1,1,0,1,1,1,0,1,1,1,0};


void main()
{
    int i = 0;

    ADCON0 = 0 ;                        //A/D Convert off 
    ANSEL = 0;                            //A/D Convert off
    ANSELH = 0;                          //A/D Convert off 
    INTCON = 0;                          //interruptions OFF
 
    //PORTB = 0x00;
    PORTC = 0x00;
    PORTD = 0x00;
  
    //TRISB = 0x00;
    TRISC = 0x00;
    TRISD = 0x00;


  while(1)
  {
    for (i=0; i<32; i++)
    {

     //PORTB = ((PORTB | car_b[i]) << 1);      //Here i mask the port, add the new
     PORTC = ((PORTC | car_c[i]) << 1);        //led of the letter, and then shift it 
     PORTD = ((PORTD | car_d[i]) << 1);        //to the left.
     delay_ms(500);
    }
  }
}

As you can see, the code isn't commented (but it's not so hard to understand...).

For the two bottom lines, there's no problem, everything is ok, I can see all the bottom of the letter.

But absolutely nothing on the PORTB. In the code above, I have to disable PORTB, because if I don't do that, even the other two lines don't work. I have only 3 leds which switch on (PORTB 0x02; PORTC 0x02 and PORTD 0x02).
Then, they switch off and that's all...

Someone could help me ?

Thank you
[/code]

 

[bobylebob]

OK, I found the trouble. I use an Easypic 5 board, and one of de switches which actually drives the leds wasn't properly set.

Noob's mistake, sorry ....