AVR-Chat

I don't know if ATMELs AVR series have this, but I would think a CAN bus would be a good option. The coms bus its self is usually a length of coax lead terminated at the end with (usually) 50ohms to stop reflections, then any additional  microcontrollers  are just tagged  on with (for instance) a BNC T-connector. You have one master (the PC) and loads of slaves (microcontrollers). Might be overkill for what you are trying to do, the protocol is quite  complicated, but I would imagine that a CAN bus module within the microcontoller does most of the work for you; however the topology is easy, just a length of transmission line. CAN buses are used in vehicles, including tanks, as well as high end cars such as Mercs.

Cheers,

Gavin

--- On Sat, 9/27/08, Leon <leon355@btinternet.com> wrote:
From: Leon <leon355@btinternet.com>
Subject: Re: [AVR-Chat] Communication between 2 Atmel microcontrollers
To: AVR-Chat@yahoogroups.com
Date: Saturday, September 27, 2008, 10:25 AM










    
            ----- Original Message ----- 

From: "Yingdan" <yingdanh@gmail. com>

To: <AVR-Chat@yahoogroup s.com>

Sent: Friday, September 26, 2008 6:42 PM

Subject: [AVR-Chat] Communication between 2 Atmel microcontrollers



> Hi everyone,

> 

> I am new to here and this is my first post. And I am totally new to

> circuitry.

> 

> I only had experience of sending and receiving data between a computer

> and a microcontroller. I want to learn how 2 atmel microcontrollers

> communicate. The scenario is like this:

> 

> A microcontroller is connected to my PC, when another microcotroller

> is connected to the 1st one, it can be powered and send its id to the

> computer. Later on, I want to have multiple microcontrollers and my PC

> should be able to figure out the topology



RS-485?



Leon

--

Leon Heller

Amateur radio call-sign  G1HSM

Yaesu FT-817ND transceiver

Suzuki SV1000S motorcycle

leon355@btinternet. com

http://www.geocitie s.com/leon_ heller


      

    
    
	
	 
	
	








	


	
	


      

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