[Embedlets-dev] RE: [Embedlets-dev][muvium] Re: proposed JSimm.uVM board

[James C. <ca...@vi...>]

I agree it would be incredibly useful and I think a common design
pattern to have these java platforms all working together like this.

One of the reasons I am so bullish about java is the way it is a 'stack'
from PC, all the way down to uVM.. You can use java all the way down.
One skill..

I love the idea of uVM plugging into TSTICKS/Jsticks HUBS and want to
make this as doable as possible.

Right now, it would be possible(I haven't done it) to take the uvmp
programming software - the source is in the uVMDK and run it on a
Jstamp! Which means you could right now program devices attached to the
jstamp over the uVM UART.

Now.. The next question is.. What about other programming conduits..
I2C, SSP!.. Well of course this can happen. I am really keen on the the
SLIP connector for programming also. 

It's all about priorities. I want to create something of a uVM proxy
class that makes the access to the external uVM devices transparent..
Basically make them into abstract peripherals.. Part of the APT. When I
put out the new version of VBB this weekend hopefully, it will have an
APT compliant emulation which as you will come to understand is the
basis for everything that sits ontop of it.

If someone who is really skilled in Jstamp will put their hand up I
would like to work with them to build a APT compliant framework - based
on the PC apt framework from virtual breadboard, for the Jstamp ie Agile
processors in general and/or for the TINI.. What will then mean is when
we build JAPL ontop of APT it will run on all platforms.. uVM, VBB,
Jstick, Tini. 

Anyone?

James Caska
www.muvium.com
uVM - 'Java Bred for Embedded'



-----Original Message-----
From: emb...@li...
[mailto:emb...@li...] On Behalf Of
Ted Kosan
Sent: Wednesday, 26 March 2003 3:18 PM
To: emb...@li...
Subject: [Embedlets-dev] Re: proposed JSimm.uVM board


Topic tags:[ARCH][JAPL][WIRING][DOCS][MGMT][STRATEGY][NEWBIE]
_______________________________________________

Bruce said:

>In the spirit of this effort I'd be willing to create such a board
>and sell it to early users at a loss. (We won't be able to recoup 
>our engineering costs in the first few hundred units, so if we sell 
>at a price of components plus out of pocket assembly, we're really 
>subsidizing the effort).
>
>So my point in sending this is to see what interest there is in us
>doing so, and what the features should be.

I think that having a uVM on a JSimm backplane would be a very useful
device to have.  For Embedlets, its looking more and more like these
type of devices would be very useful for implementing JAPL peripherals
and also giving these peripherals realtime capabilities.

One question I have is what it would take to be able to program one of
these devices through either the SPI interface or the I2C interface?  It
would be very nice to be able to plug a TStik into a JSIMM backplane to
provide Ethernet and large memory capabilities and then to plug a few
uVM JSIMM cards into the backplane in order to meet any realtime needs.

It would be great if the TStik could then provision the uVM JSIMMs as
needed without needing to use the serial ports.


Ted

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