[GreenKeys] Volpe board help...

[Duncan Brown]

The AWA Museum would be interested in a couple more boards. But if there 
is going to be another run of your boards, here is one bug in the 
"Autoprint" function that should be looked into:

On 23-Dec-16 17:26, Duncan Brown wrote:
> Eric,
>
> Thanks for designing and making available the USB-TTY adapter!.
>
> I have been using one at the AWA Museum for the last 6 months, using 
> the Autoprint feature to print out a stored  welcome message when a 
> M15 is turned on. (The USB-TTY is always powered up. When the M15 and 
> its loop supply are turned on, the USB-TTY sees the zero to loop 
> current transition as a "Break" and sends the stored message.)
>
> The only problem is that after the message ends, if you start typing, 
> or send a tape, the USB-TTY Autoprint gets triggered for some reason 
> garbling everything.  I have not been able to identify what triggers 
> the USB-TTY to think that there has been a "Break". I thought it might 
> be characters with a lot of spaces in them, but sending repeated "E", 
> "T", "Space", Blank,  etc does not trigger the USB-TTY.  It seems like 
> it is just some random typing that will trigger it. I have tried it on 
> two different M15s with the same result.
>
> I don't know how you are sensing a "Break", perhaps you just need a 
> longer sample of no loop current. Not a big problem, I'll just have to 
> switch in the USB-TTY when I want it to send the stored message. But 
> thought you would want to know about it for the next version.
>
> Thanks & have fun,
>
> Duncan Brown, K2OEQ
> USASA  31J30
>
> Antique Wireless Association Museum Asst. Curator, Commercial Equipment
> (also Chief TTY operator & repairman)
> http://www.antiquewireless.org/


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