UART and Modbus....

Go To Last Post

4 posts / 0 new

Author

Message

msd

Level: Wannabe

Joined: Thu. Nov 19, 2009

Posts: 84 View posts

Posted by msd: Thu. Sep 9, 2010 - 06:49 AM

I use atmega16 and its UART for communication with other device....
Now, I have one sensor which has output configuration as below:
Digital Output : Serial (9600 baud UART)
Electrical Interface: RS485 / RS232
Protocols Supported : Modbus
Start, Stop bits: 1,1

My question is if I configure UART of atmega16 to same specification as above, can I communicate with same function like I mean same register for uart to check there is byte and read it?

I am little confused!!

Tags:

AVR Microcontrollers, megaAVR and tinyAVR, ATmega16

Level: Moderator

Joined: Wed. Mar 28, 2001

Posts: 30679 View posts

Location: Sydney, Australia (Gum trees, Koalas and Kangaroos, No Edelweis, but plenty of Corona beer)

Posted by js: Thu. Sep 9, 2010 - 07:12 AM

Quote:

Protocols Supported : Modbus

Your answer lies in the above statement. Do you know what it is? If not start Googling.

Does you M16 board have RS485?

John Samperi

Ampertronics Pty. Ltd.

https://www.ampertronics.com.au

* Electronic Design * Custom Products * Contract Assembly

msd

Level: Wannabe

Joined: Thu. Nov 19, 2009

Posts: 84 View posts

Posted by msd: Thu. Sep 9, 2010 - 07:51 AM

js wrote:

Quote:
Protocols Supported : Modbus

Your answer lies in the above statement. Do you know what it is? If not start Googling.

Does you M16 board have RS485?

Ya, I have googled about the Modbus protocol, but my question intended to those who might have tried or implemented the modbus protocol on avr controller... :wink:
No, my board doesn't have rs485..

Level: Moderator

Joined: Wed. Mar 28, 2001

Posts: 30679 View posts

Location: Sydney, Australia (Gum trees, Koalas and Kangaroos, No Edelweis, but plenty of Corona beer)

Posted by js: Thu. Sep 9, 2010 - 09:46 PM

Quote:

my board doesn't have rs485..

So that's the first thing you need to do. Then do a search here for Modbus as it has been implemented on AVRs and the question comes up regularly. 291 matches come up.