Go Down

Topic: The Armalite, SAM3 32-bit "Arduino-Due-compatible" design (Read 9 times) previous topic - next topic

jwatte

100 MHz is not fast enough that RF theory is needed, AFAICT. However, I don't imagine you'd be happy if you run a clock signal through 10 vias and two laps around the board :-)

I really don't think there's a lot of room in the market for something like this, though. It's already super crowded. If you want simple software, and a wide range of compatible plug-and-play hardware, you need shield compatibility, and ideally Arduino IDE compatibility. For everything else, the Raspberry Pi really hits the nail at $35 (or $25 without networking.) And, if for some reason you don't like those, there's still a phletora of boards like mBED, LPCExpresso, BeagleBone, PandaBoard, Gumstix, etc.

Graynomad

Quote
How difficult is it to design a minimal ARM environment?

AFAIK (and remember I haven't got a board made yet) it's not difficult, all the signals seem pretty straight forward. I am using a 4-layer board with power and ground plains mostly because it seems like a good idea and makes the layout a LOT easier. Whether or not it's required I don't know.

Quote
Also, how forgiving of questionable layout are these, at ~100MHz?

Quote
100 MHz is not fast enough that RF theory is needed,

Bear in mind that there really isn't any 100MHz stuff outside the chip, I have paid special attention to the USB and microSD signals. Also external memory is on the backplane so it's a fair guess that it won't run at full speed.

Most other signals are normal IO which shouldn't be too hard to handle. The SAM also has on-board terminating resistors on all IO pins.

Quote
I really don't think there's a lot of room in the market for something like this, though.

Quite possibly, I've always done things for the fun of it so that doesn't really matter to me.

That said AFAIK none of those board have this combination of features, whether or not these features are of interest to people is another story :)

______
Rob
Rob Gray aka the GRAYnomad www.robgray.com

Graynomad

Just for fun, a very rough mock up of a breadboardable no-frills version in the "aircraft carrier" form factor.



It would need two BBs but I don't see any problem with that.

______
Rob
Rob Gray aka the GRAYnomad www.robgray.com

Graynomad

#33
Apr 29, 2012, 06:10 am Last Edit: Apr 29, 2012, 02:28 pm by Graynomad Reason: 1
A recent tweet from the Arduino team

Quote
the processor is a SAM3/X from ATMEL


This is one nice chip (depending on the actual model used), looks like a re design is in the air :)

Also hopefully this snippet of information means the release is close.

______
Rob
Rob Gray aka the GRAYnomad www.robgray.com

SirNickity

I also have my eye on the Beagle Bone, but if yours were available (either form factor, though the BB-compatible one suits my taste better), I would have to get a couple.  For what it's worth.

Go Up