In your receiver, if that is all the code you have, when you test a bit
 and it is high, you're going to skip right over the "GOTO" statement and
 start executing whatever is in memory past that point.  If it is a new
 part, or an erased part, it will probably execute "NOP's".

 This may be part of your problem, but it's really difficult to say 
 without all of the code shown so we can see your logic.


                                         Regards,

                                           Jim


> Hello,
> 
> I try to connect to two pics with two wires (Ground and Data). I'm
> sending  ASCII codes and the receiver has to diplay the text on a LCD.
> It is NOT  working. The receiver waits for the startbit (5V) and the
> sender is sending  all the bits, but the pic16f818 is not passing the
> code
> back   btfss  Portb,dataIn
>           goto back.
> I have measured with my scope the signal on pin 10 (portB - 4) and that
> is  okay.
> 
> Is there some special on connecting two pics which I forget??
> 
> ; pic12f675/sender
> ; GPIO1 =  output     dataOut  pin 6
>  #define dataOut gpio,1
> ; code:
>    bcf   dataOut
>    call  delaybit   ; delay 2 bits / 2millisec
>    call  delaybit ;
>    bsf   dataOut ; Startbit high
>    call  delaybit ;
>    bcf   dataOut ; bit low
> ++++++++++++++++++++++++++++++++++++++++
> ; pic16F818/receiver
> ; B4 - DataIn  input
> dataIn  equ  4
> 
> back   btfss  Portb,dataIn  ; read start bit
>             goto back
> 
> 
> 
> met vriendelijke groeten,
> Chris Burger
> Aalden (Dr)/NL
> +++++++++++++++
> ac.burger@hccnet.nl
> +++++++++++++++ 
> 
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