AVR-Chat

In the simplest setting, you just use the drivers from ftdi, and the device
looks like a com port on the PC. On the microcontroller end, it's an async
serial device. Just hook it up to the tx & rx pins of your uart, set the
baud rate accordingly, and it's running. Really couldn't be much simpler. 

Also, you may want to look at the modules from Lynx, which have the ftdi
chip and all the glue in a 16 pin hand-solderable package. Just add a USB
connector and you're good to go.

Phillip
http://www.visualconductor.com

-----Original Message-----
From: Hugo Oliveira [mailto:oliveira.hugo@gmail.com] 
Sent: Friday, February 25, 2005 8:01 AM
To: AVR-Chat@yahoogroups.com
Subject: Re: [AVR-Chat] USB interface


Hi everyone, once more thanks for the answers. I have some more
questions though. Would I need a lot of code in the microcontroller
side, when using for example FT232BM? Are there any restrictions for
my 16 devices to be running together (could I cascade hubs for that?)
and what speed transmition I could achieve?

Thanks in Advance
Hugo Oliveira



On Thu, 24 Feb 2005 10:59:51 -0500, Dave VanHorn <dvanhorn@dvanhorn.org>
wrote:
> 
> At 10:25 AM 2/24/2005, Hugo Oliveira wrote:
> 
> >Hello Everyone,
> >  Thats my first time writing to this group and I have a question
> >concerned with USB interface. I hope any of you can help me.
> >
> >I am developing a board that uses the a new ATMEL microcontroller
> >(AT90PWM). I need this board to have a interface that will let me plug
> >16 of these in a PC. I am considering USB (with one ore two USB hubs)
> >but my microcontroller does not have this interface. I have a USART
> >and a SPI though. Are there such a thing like a USART <> USB chips
> >available? I dont what that part of my project to take a great deal of
> >time. It does not have to be a very cheap solution because it
> >represents only a small share of the project.
> 
> FTDI makes serial port chips that will do the interface for you.
> They show up on the PC as a serial port, and connect directly to your uart
> signals.
> You'll need to implement hardware handshaking.
> 
> 
> Yahoo! Groups Links
> 
> 
> 
> 
>


 
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