AVR-Chat

Jim, did you read something about RS485/RS422? 

They support 1200 meters, using resistors on each end line. 

120 ohms between lines of the transceiver and 680 ohms to VCC from one wire
and 680 ohms to ground from the other wire.

Vcc 680ohms 1st Terminal 120 Ohms 2nd Terminal 680 ohms ground.

 

Ricardo Callejo

Argentina

 

  _____  

De: AVR-Chat@yahoogroups.com [mailto:AVR-Chat@yahoogroups.com] En nombre de
Jim Wagner
Enviado el: Miércoles, 28 de Febrero de 2007 02:19 p.m.
Para: AVR-Chat@yahoogroups.com
Asunto: Re: [AVR-Chat] communication b/n many controllers

 

Are you using any sort of interface (transmitter/receiver)?

What is the distance from the host and the slaves?

Do you have an enable line for every slave? Are those lines
buffered?

Jim

On Wed, 28 Feb 2007 08:14:43 -0000
"magzky02" <magzky02@yahoo. <mailto:magzky02%40yahoo.com> com> wrote:
> 
> Hello guys
> 
> my master controller is going to use one UART to
> communicate with 18 
> slave controllers. i use i/o control lines to avoid
> corruption. My 
> question is that is this method reliable? Is there no
> effect of the 17 
> others connected to the line when one is communicating to
> the master? 
> any idea?
> 
> regards
> 
> mago
> 

----------------------------------------------------------
The Think Different Store
http://www.thinkdif <http://www.thinkdifferentstore.com/> ferentstore.com/
For All Your Mac Gear
----------------------------------------------------------

 



[Non-text portions of this message have been removed]