In a message dated 12/30/98 10:35:21 PM US Mountain Standard Time,
tjaart@WASP.CO.ZA writes:

<< > I am looking at using I2C to communicate between two PIC processors.  How
do
 > they have two way communication if both are in slave mode?  I am sure one
has
 > to be master.
 The only two ways would be :
 1) Place one in slave mode, and the other in master mode (do-able).
 2) Place both in master mode, and implement the multi-master protocol (very
hairy).

 The better way would be to use async comms (serial).
  >>

If I use the on chip UART to talk to another PIC do I have to use  MAX232 to
convert signal?

What is the easiest way? My last project I used software in two PICS for
serial comms. It worked great at 9600 inverted baud with handshaking. I wanted
to use a hardware UART on one PIC to help with other timing issues.

 I guess hardware can't create an inverted signal. I really didn't want to add
another part (MAX232).

What do you think?

Jon