AVR-Chat

--- In AVR-Chat@yahoogroups.com, BobGardner@... wrote:
>
> how to connect 2 AVR with out serial 
> for Example :
> PORTD of AVR1 ==  Sending data
> PORTD of AVR2 == Resiving data   XXXXXX
> ===============================
> 8 bit parallel: Need to send on one port and receive on another,
also need  
> handshake lines
> Or use SPI if distance is not too great
> Or use 1 output and 1 input and 'bitbanging'... can be either full
duplex  or 
> half duplex


if for Max 4 cm distance i need a hardware for this ?