🚀 go-pugleaf

> Hello everybody,
> I want to use the complete portA of a PIC16f628 as 8 bit input/output (I
can
> not use the portB because I will need the usart function which is on the
> portB). For the moment, I'm trying to make the 8 pins blinking. Each of
them
> are working except the RA4 and the RA5.
> Is there something special I have to add to my code? Also I am not sure to
> have correctly configure the configuration byte in order to use the
RA5/MCLR
> pin as RA5.
> Does somebody have any advice to solve that?
> Thanks in advance, Georges
>

Hello,

You can solve the ra4 problem by turning off the comparators port Ra4.  You
can do this by following code I written (microchip assembler).
Note that Ra4 is an open collector output.  Use the port as in the example:

    Vdd -------------
                              |
                            Resistor
                              |
                            Led
      Ra4                  |
           *------------

initport     bsf          status,RP0                  ;Select bank 1
               movlw     b'11001111'               ;Make Ra4,ra5 outputs
               movwf     TRISA
               bcf          status,RP0                   ;Select bank 0
               movlw     b'00000111'                ;Turn comparators off
               movwf     CMCON

For your problem with Ra5 you should clear Bit 5 in the configuration word
you can do this in your programming software. And clearing also the bit 5 of
the trisA register.

Grtz The Butcher
You need info about the Phillips RC5 code : 1 link
http://users.pandora.be/davshomepage
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