Hi,

        Thanks for all your suggestions, I've got some good ideas to try
now.
        I think I'll try the ASYNC serial solutions.

        Just one thing regarding I2C, When I mentioned I couldn't find
        any code for the SLAVE only the MASTER this was after looking at
        the HI-Tech example. Is this just for the MASTER or will it work
        for both and if so how do you set the slave address. It's just that
        I see that most of the functions take an address parameter but I
        don't see the address being set anywhere in the functions/code.


Thanks again,

Russ.



-----Original Message-----
From: Antonio L Benci [mailto:Nino.Benci@SPME.MONASH.EDU.AU]
Sent: Monday, May 07, 2001 12:48 AM
To: PICLIST@MITVMA.MIT.EDU
Subject: Re: Pic <--> Pic Comms


Check out:

http://www.hth.com/snap/

Nino.

Russell Farnhill wrote:
>
> Hi all,
>
>         I want to be able to control six F84's from a master
>         F84. I think my options are I2C, SPI or some serial link.
>
>         It would also be nice if the slaves could send data back
>         to the master as well.
>
>         Looking on the net I find lots of I2C routines, but they
>         all seem to be for the master and not for the slave.
>
>         Does anyone know where I could get a simple set or routines
>         in 'C' for slave and master to get me going.
>
>         SPI... Don't really know anything about this so I'll look
>         at this if I can't get anywhere with I2C or Serial.
>
>         lastly Serial...
>
>         I think this is my best chance of success because I've already
>         got one pic talking to another and probably just need to expand
it.
>
>         Would this serial set-up work ?
>
>         Master pic Tx pin wired to all six slave Rx pins
>         Master Pic Rx pin wired to all six slave Tx pins
>
>         So now master should be able to send cmd's to any slave and
>         any slave back to master. Also I thought of using six more pins
>         on the master as Select lines going to each slave. So slave can
>         grab attention of master and help on bus collisions.
>
>         I'am a little unsure about all the slave Tx pins connected
together
>         on the master Rx pin, if all Tx's are low and one goes high to
send
>         data, will this cause a short and blow the pin ??, if so could I
use
>         some series resistor or something ?
>
>         Any suggestions, help appreciated.
>
> Thanks,
>
> Russ.
>

Nino.
--
------------------------------------------------------
| Antonio (Nino) L. Benci                            |
| Professional Officer, Electronic Services          |
| School of Physics & Materials Engineering          |
| Monash University                                  |
| email: nino.benci@spme.monash.edu                  |
| T: 61 3 9905 3649. F: 61 3 9905 3637               |
| M: 0414 924 833                                    |
------------------------------------------------------


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