Hi there!

As you can see im new to these forums.

Firstly, apologies for the long post, but if you just bare with me im sure
this is a very simple problem. 

I'm currently working with a DLP2232PB module which is effectively a USB
enabled 16F877A PIC chip.

http://www.dlpdesign.com/dlp-2232pbv10.pdf

I am programming with mikroC but am having a lot of difficulty in setting
the various ports to I/O

>From the data sheet it seems have the following I/O ports available;

A0 - also connected to A/D channel 0
A1 - also connected to A/D channel 1
A2 - also connected to A/D channel 2
A3 - also connected to A/D channel 3
A4 - also connected to open drain output
A5 - also connected to A/D channel 4

AC0-AC3 - connected to USB IC

B0
B5

C0->C7


D0->D7

E0

I want to have all ports as digital input apart from D which i wasnt as a
digital output. Only problem is i dont really know what im doing. I have a
fairly healthy knowledge of C but a fairly limited knowledge of PICs

my code so far is;


****

// First PIC program

void main()
{
  PORTA = 0x00;
  TRISA = 0x00;
  PORTB = 0x00;
  TRISB = 0x00;
  PORTC = 0x00;
  TRISC = 0x00;
  PORTD = 0x00;
  TRISD = 0x00;
  PORTE = 0x00;
  TRISE = 0x00;

while(1)
 {
     if ( (PORTB & 0x20) == 0x20 )
        {
        PORTD = PORTC;
        }
     if ( (PORTB & 0x01) == 0x01 )
        {
        PORTD = 0xff;
        Delay_ms(500);
        PORTD = 0x00;
        Delay_ms(500);
        }
     else PORTD = 0x00;
 }

}

****

This does what it is supposed to - PORTD flashes 8 LEDs or sets them to the
value of PORTC dependant on the state of PORTB. I simply cannot get the
other ports to function as inputs though.

Any help would be greatly appreciated.


Again, sorry for the long post


Mark
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