[GreenKeys] USB to TTY-loop possibility...

[Raymond Cote]

Sounds like a project. Good luck and I will keep an eye or 2 open for your update.  Seems like I have a RS232 to baudot converter made by Black box somewhere. Don't know of they are still in business so I can look up its configuration. 
Ray

Some people spend an entire lifetime wondering if they made a difference in the world. But, the Marines don't have that problem. 
Ronald Reagan, President of the United States ; 1985
"""""""""""""""""""""""""""""""""""Raymond Cote
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On Nov 2, 2012, at 14:34, epvgk at limpoc.com wrote:

> It seems like lots of folks have been looking for an easy solution to 
> connecting a computer to a TTY loop... There are various options like 
> reprogramming the CP2102-based usb-serial adapters and using PC software
> to generate the baudot code for it. 
> 
> I just picked up a little breakout board for an Atmel cpu (Atmega32u4)
> which is tiny and has USB support builtin. The whole board is only like 
> 3/4" by 1" and costs $16.  I've been playing around a bit writing software
> to make it act as a complete USB to TTY adapter...
> 
> The idea is to make it look to the computer like a generic USB serial device,
> but internally handle all the character set conversion, shifts, and framing,
> and without a large internal buffer. So you talk to it from the computer
> in ASCII and it ignores whatever the computer thinks about baud rate, character
> size, etc, and produces correctly timed 7.42 code at 45.45 baud on the output
> end, and vice versa for receiving. It only picks up a new character from 
> the computer when it's done sending the current one to the loop, to avoid
> having to wait for a buffer full of data to transmit once you stop sending.
> 
> Anyway, it's nowhere near finished but i have the sending side more or less
> working as a proof of concept at least... if I can get it working well I'll 
> make the software available and anybody who wants to can get one of the boards
> and program it with my code... just thought I'd mention it in case anyone is
> interested, and to motivate myself to make time to finish it :) 
> 
> eric
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