Synth-DIY Yahoo! Groups Archives

Re: [AVR-Chat] I2C Communicaton via Codevison

2008-03-22 by dilipsilga

Chech ddrx for sda/scl also check i/o define at startup c file #asm{}

Sent from my iPhone

On Mar 20, 2008, at 12:24 AM, "Benny Smith" <benny@inch-worm.com> wrote:



I have written a short program using the Codevision AVR C-compiler (version
1.25.8a) to communicate between an ATMega128 and an electronic compass chip
using the I2C (inter-integrated-circuit) functions in Codevision.

So far, no luck. I have followed the example shown in the CV-AVR Help file.
Using an oscilloscope, I do not see any activity at either of the Mega128
ports that I have designated for I2C communication.

Has anyone else used the Codevision compiler's I2C functions and been
successful?

I have described my problem in an email to Pavel Haiduc at HPInfoTech
(author of Codevision) but he has not yet responded.

Benny Smith

Santa Rosa, CA

_._,___ 

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






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RE: [AVR-Chat] I2C Communicaton via Codevison

2008-03-22 by Benny Smith

Thanks for the input, everyone.

 

I added an additional start command (in CodeVision AVR, this is: i2c_start()
) and that did the trick.

 

I also made the connections between the ATMega128 and the i2c slave chip as
short as possible.

 

It works perfectly now.

 

The Codevision i2c functions are pretty slick.

 

Benny Smith

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-----Original Message-----
From: AVR-Chat@yahoogroups.com [mailto:AVR-Chat@yahoogroups.com] On Behalf
Of dilipsilga
Sent: Saturday, March 22, 2008 4:33 AM
To: AVR-Chat@yahoogroups.com
Subject: Re: [AVR-Chat] I2C Communicaton via Codevison

Chech ddrx for sda/scl also check i/o define at startup c file #asm{}

Sent from my iPhone

On Mar 20, 2008, at 12:24 AM, "Benny Smith" <benny@inch-worm.
<mailto:benny%40inch-worm.com> com> wrote:

I have written a short program using the Codevision AVR C-compiler (version
1.25.8a) to communicate between an ATMega128 and an electronic compass chip
using the I2C (inter-integrated-circuit) functions in Codevision.

So far, no luck. I have followed the example shown in the CV-AVR Help file.
Using an oscilloscope, I do not see any activity at either of the Mega128
ports that I have designated for I2C communication.

Has anyone else used the Codevision compiler's I2C functions and been
successful?

I have described my problem in an email to Pavel Haiduc at HPInfoTech
(author of Codevision) but he has not yet responded.

Benny Smith

Santa Rosa, CA

_._,___ 

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

__________________________________________________________
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know-it-all with Yahoo! Mobile. Try it now. http://mobile.
<http://mobile.yahoo.com/;_ylt=Ahu06i62sR8HDtDypao8Wcj9tAcJ>
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