[GreenKeys] OT - Help with Arduino USB Shield

[Steve Garrison]

Well your reply about a CDC ACM endpoint may help me out.  In some of the examples that have led to my head scratching I have seen the term "ACM" and wondered what that was.  I'll now dig into that a little farther.

And there is a library that makes setting up the "host" hub, but I'm a little lost in trying to code everything needed.

Thanks Eric!

Steve G./N4TTY
Sent from my iPhone

> On Dec 15, 2016, at 2:02 PM, epvgk at limpoc.com wrote:
> 
>> On Thu, Dec 15, 2016 at 12:49:56PM -0500, Steve Garrison wrote:
>> While the topic says "Off Topic," it really isn't way off topic since it TTY
>> related.  In the long run it might come in real handy for others.
>> 
>> 
>> 
>> I'm trying to connect Eric's USB current loop serial adapter to an Arduino
>> USB Host Shield so I can take data from the Arduino and send it to whatever
>> current loop device I have connected to Eric's board.
> 
> I wasn't even aware there was a USB host implementation for arduino. That sounds
> hard, because implementing USB hosts is complicated. Hopefully there is a canned
> arduino library framework that packs it all up for you. 
> 
> I wonder if it wouldn't be easier to just use software "bitbanged" serial and a 
> simple optical interface to the tty loop? 
> 
> As far as the adapter itself, it just presents itself as a very standard CDC ACM
> endpoint, which is probably the simplest USB device example. 
> 
> eric
> 
> 
> 
>> 
>> 
>> 
>> I'm really having trouble seeing how to implement the USB host shield once
>> connected to the Arduino.  The examples that I have looked at just leave me
>> scratching my head!!
>> 
>> 
>> 
>> Is there anyone out there that has any experience using an Arduino USB
>> shield that might be able to help me out?
>> 
>> 
>> 
>> The long range goal of this project might just be of interest to all if I
>> can get over this hurdle.  But I'll save that story for a later update.
>> 
>> 
>> 
>> Steve G./N4TTY
>> 
>> 
>> 
>> 
>> 
> 
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