[GreenKeys] USB to TTY (model15) interface

[Michael Katzmann]

I worked on the Linux driver for the Prolific PL2303 chip to work on
arbitrary baud rates.
https://github.com/torvalds/linux/blob/master/drivers/usb/serial/pl2303.c
This Sabrant USB to serial dongle is cheap and available on Amazon. It uses
the PL2303 and does work at 45 baud....  https://a.co/d/b28TLPC
The Linux driver doesn't accept fractional baud rates, so you can't specify
45.45 baud as built, but you could modify and recompile the driver if that
worries you (hint: it's close enough and the dividers won't get you exactly
there anyway).
Incidentally, the Linux driver looks to see if you are using 5 bits and
sets the number of stop bits to 1.5 if you ask for 2 stop bits.

Michael

On Thu, Feb 9, 2023 at 9:48 AM chris johnson <archangel_cpj at hotmail.com>
wrote:

> Im still trying to come up with a way to connect my laptop or a PC to my
> model 15s or 19 Im having a bear of a time seems like many of the
> components folks built the boards for these with simply dont work with 45
> baud anymore... Im sitting here wondering if one of my Hal 5000s or 6000s
> couldn't be the bridge and some type of software be used to solve the
> issue.??? A bit of background I designed a PC based weather notification
> system for use in emergency management and we use a very nice third party
> software for getting then processing the weather alerts etc... I think it
> would be cool to use one of my 15s as a defacto printer when I want to play
> or on a busy weather day... I can send the data numerous ways and could
> simply actuate a .exe program or send it to a printer etc etc... My thought
> was
> since my Hals already have a RS232 port and a loop output that easily
> hooks to the 15s would it be possible to use an existing software solution
> as a Bridge so basically Id send the weather alert to be printed through
> some sort of software that could feed it the RS232 port in the Hal at 45
> baud which would then relay it to the model 15...
>
> Thoughts and Im no software writerr..
>
>
>
>
>
>
>
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