Also, for what its worth, it looks like ARM SAM3X83 supports EMIF. Here
<http://www.atmel.com/devices/sam3x8e.aspx> they state:
> "The 16-bit external bus interface supports SRAM, PSRAM, NOR and NAND
Flash with error code correction."
So to me it seems feasible that I could connect a SAM3X8E MCU to
external memory and therefore store a large (JVM) binary "on" it (well,
using integrated memory that is) and hook it up to, say, a 4GB heap.
Just keeping interested parties updated on my R&D...
On 8/13/15 3:01 AM, Joakim Gebart wrote:
You misread.
https://en.wikipedia.org/wiki/Raspberry_Pi#Specifications
RPi2 has 1 Gigabyte RAM, not Megabyte.
/JG
On Thu, Aug 13, 2015 at 3:41 AM, Zac Harvey <[email protected]> wrote:
Kaspar & Adam,
Thanks for the ideas (lejos and non-JVM langs). I am already in touch with
the lejos admin.
All,
An earlier suggestion was to investigate SOCs like Raspberry Pi or
BeaglBoard. At first I thought: OK this is exactly what I need! But now
that I'm really thinking about it, there's something that leaves me feeling
uneasy here.
So the main argument against the ARM SAM3X8E for a JVM is that it only has
512KB ROM and 96KB RAM. But after researching the RaspberryPi, the later
models are using an ARM Cortex-A7 CPU that, according to Wikipedia it has
1MB RAM. So this doesn't make sense: why is RaspberryPi touted as a
JVM-capable ARM-based SOC, whereas SAM3X8E is totally incapable of such a
feat (nothing in the modern Java landscape will run on 1MB).
Clearly I'm missing something here, but: what is the difference between
RapsberryPi's ARM processor vs SAM3X8E that makes it capable of running a
Java app?!?
Thanks,
Zac
On 8/12/15 2:30 PM, Adam Hunt wrote:
While I applaud the idea of getting something as heavyweight as a JVM to run
on the type of devices that most of us on this list are targeting have you
thought about non-JVM languages? I've often wondered how small of a system
Erlang could be persuaded to running on.
On Wed, Aug 12, 2015 at 4:47 AM Kaspar Schleiser <[email protected]>
wrote:
Hey,
On 08/12/2015 01:36 PM, Zac Harvey wrote:
still planning on using RIOT-OS if it all possible.
When you're evaluating embedded JVMs, take a look at the VM used by
leJOS. It seems like it could rather easily be cut out of the OS, and it
is apparently very capable even on the lego NXTs (64kb RAM, 256kB
flash), and seems like more than a research proof-of-concept.
Kaspar
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