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From: "Lyndon Nerenberg (VE7TFX/VE6BBM)" <lyndon@orthanc.ca>
To: 9fans <9fans@9fans.net>, Bakul Shah <bakul@iitbombay.org>
Subject: Re: [9fans] building blocks speaking 9p
Date: Fri, 28 Jan 2022 12:55:26 -0800	[thread overview]
Message-ID: <4409eb4324d31783@orthanc.ca> (raw)
In-Reply-To: <E4F13D45-9C44-487A-904D-31881DA01DF0@iitbombay.org>

Bakul Shah writes:

> - make it very easy to create hardware gadgets by
>   providing a firmware/hardware building block that
>   talks 9p on the host interface side & interfaces
>   with device specific hardware.

Amen!  I've been thinking about something like this for years.
My specific use case involves controlling radio transceivers.
Right now I do this with assorted Arduino hardware that speaks
GPIO and RS232 (mostly) to the radios, and RS232 to the upstream
"controller" host.  This burns through a lot of serial ports on
the controller.

What I would prefer is to have all those Arduinos connected
to an RS485 multidrop, each exporting a 9p filesystem for the
control interface.  Shoveling the data around on the RS485
"bus" just needs a simple frame wrapped around the 9p packets
that provides device addressing and a CRC.  On the Plan9 side
this just becomes another network type, with ndb handling
the device addressing.

As others have mentioned, having a native Atmel C compiler would
be a real boon here, but there's no reason why this couldn't be
done with an Arduino 9P library.  I haven't investigated if such
a thing exists, although I'm sure it does.

--lyndon

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  parent reply	other threads:[~2022-01-28 20:55 UTC|newest]

Thread overview: 34+ messages / expand[flat|nested]  mbox.gz  Atom feed  top
2022-01-27 22:57 Bakul Shah
2022-01-28  2:55 ` Thaddeus Woskowiak
2022-01-28  3:31 ` Lucio De Re
2022-01-28  5:16   ` Bakul Shah
2022-01-28 10:16     ` Lucio De Re
2022-01-28 19:01       ` Charles Forsyth
2022-01-28 21:26         ` Bakul Shah
2022-01-28 21:37           ` Eli Cohen
2022-01-28 20:54       ` Tony Mendoza
2022-01-28 20:59       ` Tony Mendoza
2022-01-28 21:03         ` ori
2022-01-28 21:07           ` Tony Mendoza
2022-01-28 21:06         ` Eli Cohen
2022-01-28 21:16           ` Tony Mendoza
2022-01-28 21:27             ` Eli Cohen
2022-01-28 21:33               ` david
2022-01-28 21:46                 ` Tony Mendoza
2022-01-28 22:23                   ` David Boddie
2022-01-29  1:04                 ` Lyndon Nerenberg (VE7TFX/VE6BBM)
2022-01-29  2:08                   ` David Boddie
2022-01-29  3:36                     ` Tony Mendoza
2022-01-29 18:03                     ` David Boddie
2022-01-29  2:32           ` Thaddeus Woskowiak
2022-01-29 20:04             ` [9fans] aiju boards Lyndon Nerenberg (VE7TFX/VE6BBM)
2022-01-28 19:32   ` [9fans] building blocks speaking 9p Kent R. Spillner
2022-01-28  4:54 ` ori
2022-01-28 20:55 ` Lyndon Nerenberg (VE7TFX/VE6BBM) [this message]
2022-01-29  9:16 ` Skip Tavakkolian
2022-01-29 11:56   ` Frank D. Engel, Jr.
2022-01-29 12:14     ` Frank D. Engel, Jr.
2022-01-29 12:30       ` Frank D. Engel, Jr.
2022-01-29 13:24         ` cinap_lenrek
2022-02-15  3:07 ` Lyndon Nerenberg (VE7TFX/VE6BBM)
2022-01-29 20:53 Lyndon Nerenberg (VE7TFX/VE6BBM)

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