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

[epvgk at limpoc.com]

On Fri, Nov 02, 2012 at 03:06:27PM -0500, Jim Haynes wrote:
> Does it have an internal UART that you can set to TTY speeds, or do you
> have to generate the characters by timing loops?
> 
> 
> jhhaynes at earthlink dot net


It has an internal UART which *can* generate the right framing, except that
in order for USB to work you have to clock it high enough that the UART won't 
run at TTY speeds. I actually generate the characters (and decode, for that 
matter) with a state machine in an interrupt routine that can be clocked 
anywhere from 0.24 baud to hundreds of Kbaud.

eric