🚀 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
!!! Remove f*ckspam in email addressl.

Thanks for the info
"The Butcher" <thebutcher1f*ckspam@pandora.be> a �crit dans le message de
news:3NXqa.4191$5Y6.727321699@hestia.telenet-ops.be...
>
> > 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
> !!! Remove f*ckspam in email addressl.
>
>