AVR-Chat

I have done projects that implement an RS232 interface.  Now I want
higher throughput.

So...I am looking for a "library" or an AVR-USB driver or some other
"something" that I can use to implement USB functionality on an AVR
project.  I've seen one from ObDev but I want to see if someone knows
of something better.

Thanks,

David

Hi David,
I have thought about going into USB comms, but it is really complicated, the easiest solution is to use an FTDI chip and communicates with it through RS232, visit:

http://www.ftdichip.com/

Cheers,

Gavin

--- On Sun, 8/31/08, englsprogeny <englsprogeny@yahoo.com> wrote:

From: englsprogeny <englsprogeny@yahoo.com>
Subject: [AVR-Chat] USB interfacing
To: AVR-Chat@yahoogroups.com
Date: Sunday, August 31, 2008, 10:03 AM










    
            I have done projects that implement an RS232 interface.  Now I want

higher throughput.



So...I am looking for a "library" or an AVR-USB driver or some other

"something" that I can use to implement USB functionality on an AVR

project.  I've seen one from ObDev but I want to see if someone knows

of something better.



Thanks,



David




      

    
    
	
	 
	
	








	


	
	


      

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

I think the OP's question was about throughput, which would indicate the 
speed of RS-232 isn't fast enough.  Aren't the FTDI chips still limited 
to those (RS-232) speeds?

David, have you thought about some of the USB AVRs?  I bought a couple 
of USBKEY development boards a while back to experiment with but haven't 
had time to do so yet.  At about 32 bucks they aren't expensive, but the 
connectors are a bit hard to come by.  When you register the boards, I 
think, Atmel has the pc side drivers.


REB


Gavin Dingley wrote:

> Hi David,
> I have thought about going into USB comms, but it is really complicated, the easiest solution is to use an FTDI chip and communicates with it through RS232, visit:
>
> http://www.ftdichip.com/
>
> Cheers,
>
> Gavin
>
> --- On Sun, 8/31/08, englsprogeny <englsprogeny@yahoo.com> wrote:
> From: englsprogeny <englsprogeny@yahoo.com>
> Subject: [AVR-Chat] USB interfacing
> To: AVR-Chat@yahoogroups.com
> Date: Sunday, August 31, 2008, 10:03 AM
>
>     
>             I have done projects that implement an RS232 interface.  Now I want
>
> higher throughput.
>
>
> So...I am looking for a "library" or an AVR-USB driver or some other
>
> "something" that I can use to implement USB functionality on an AVR
>
> project.  I've seen one from ObDev but I want to see if someone knows
>
> of something better.
>
>
>
> Thanks,
>
>
>
> David
>

--- In AVR-Chat@yahoogroups.com, "Roy E. Burrage" <RBurrage@...> 
wrote:
>
> I think the OP's question was about throughput, which would 
indicate the 
> speed of RS-232 isn't fast enough.  Aren't the FTDI chips still 
limited 
> to those (RS-232) speeds?

REB, the FTDI has some chips that goes up to RS-232 speeds.

> David, have you thought about some of the USB AVRs?  I bought a 
couple 
> of USBKEY development boards a while back to experiment with but 
haven't 
> had time to do so yet.  At about 32 bucks they aren't expensive, 
but the 
> connectors are a bit hard to come by.  When you register the 
boards, I 
> think, Atmel has the pc side drivers.

I'm interested on USB AVRs, could you tell us what USBKEY development 
boards that you bought?


regards,
brunomusw

--- In AVR-Chat@yahoogroups.com, "Roy E. Burrage" <RBurrage@...> 
wrote:
>
> I think the OP's question was about throughput, which would 
indicate the 
> speed of RS-232 isn't fast enough.  Aren't the FTDI chips still 
limited 
> to those (RS-232) speeds?

Hi folks,

what exactly is "RS232 speed"??  :-))

Fact is (from the V2.01 datasheet) that the FT-232 chip is good for 
serial "data transfer rates up to 3 Mbaud at TTL level".

I think common AVR applications will have a hard time to produce a 
sustained stream of 3 MBaud of useful data...

Greeting from Berlin, Germany,
Stefan

I have used the FTDI FT232 part and nothing could be easier.  You  
give it TTL serial data, it spews out over USB, and vice versa.  Out  
of the box with no configuration or setup, it runs at only 9600 bps.   
You can add config memory and set it up for higher speeds.  I'd  
highly recomend checking that out.

On Aug 31, 2008, at 2:03 AM, englsprogeny wrote:

> I have done projects that implement an RS232 interface.  Now I want
> higher throughput.
>
> So...I am looking for a "library" or an AVR-USB driver or some other
> "something" that I can use to implement USB functionality on an AVR
> project.  I've seen one from ObDev but I want to see if someone knows
> of something better.
>
> Thanks,
>
> David
>
>
> ------------------------------------
>
> Yahoo! Groups Links
>
>
>

You can give CP2102 from Silabs. I have found it to be easy to put in the
circuit and its driver configuration tools are very handy too.

 

-SJ

 

  _____  

From: AVR-Chat@yahoogroups.com [mailto:AVR-Chat@yahoogroups.com] On Behalf
Of Philippe Habib
Sent: 02 September 2008 15:40
To: AVR-Chat@yahoogroups.com
Subject: Re: [AVR-Chat] USB interfacing

 

I have used the FTDI FT232 part and nothing could be easier. You 
give it TTL serial data, it spews out over USB, and vice versa. Out 
of the box with no configuration or setup, it runs at only 9600 bps. 
You can add config memory and set it up for higher speeds. I'd 
highly recomend checking that out.

On Aug 31, 2008, at 2:03 AM, englsprogeny wrote:

> I have done projects that implement an RS232 interface. Now I want
> higher throughput.
>
> So...I am looking for a "library" or an AVR-USB driver or some other
> "something" that I can use to implement USB functionality on an AVR
> project. I've seen one from ObDev but I want to see if someone knows
> of something better.
>
> Thanks,
>
> David
>
>
> ------------------------------------
>
> Yahoo! Groups Links
>
>
>

 



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

Hi
 
I have tried to run RFM12 wireless module . but I couldn't drive it with AVR.;
I wanted to know have anyone worked with it? or can someone suggest me a better module?
 
best regards;
Ali


      

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

--- In AVR-Chat@yahoogroups.com, Ali Ghadirzadeh <ali.ghadirzadeh@...> 
wrote:
>
> Hi
>  
> I have tried to run RFM12 wireless module . but I couldn't drive it 
with AVR.;
> I wanted to know have anyone worked with it? ...

This module is very popular in some german electronics forums since 
they became available thru some distributors for about 6-8 Euros and 
someone discovered the original manufacturer in china and organized a 
group order of several hundred for about 2.50 Euros a piece.
(The same manufacturer has cheap replicas(?) of some of the Sensirion 
chips too. Seems he is the one who supplies all that cheap chinese 
weather station manufacturers.)

You can find hints (in German) and software here:
http://www.mikrocontroller.net/topic/67273

Scroll up from the bottom to find the newest version in the attachments.

HTH,
Stefan