[Gnuk-users] Seeedstudio website

[NdK]

Il 19/04/2016 04:42, NIIBE Yutaka ha scritto:

> Is it reproducible by other party?
Yup. Solderpad licence.

> I think that you are talking in wider sense, about physical entity,
> namely, Gnuk Token.
Yup. Right.

> It could be completely "open", when there will be an implementation of
> MCU by free design which is compatible to STM32 (or KL27Z).  I am
> "open" to such an implementation (or others).
PULP uses a RISC-V architecture:
-8<--
What you will get is a competitive, state-of-the-art 32-bit processor
based on the RISC-V architecture, with a rich set of peripherals, and
full debug support. At ETH Zurich and Universita’ di Bologna we have put
many of the ideas that we have developed through our research on
ultra-low-power parallel processing (PULP project) into PULPino. It is
the little hip brother to its more serious bigger brothers.
-8<--
(from http://www.pulp-platform.org)

> Actually, there are many free designs of CPU itself, other than
> RISC-V.  The problem is that it's not available as a hardware product
> for users.
IIUC it's been already implemented multiple times, with different
configurations, by students. But it's not yet commercially available as
a finished product.

> I'd like J2, the SuperH implementation, if we are talking about
> architecture and free design of CPU.  I don't need bank registers,
> though.
Seems they're not near production phase...

> If someone has (huge) budget to build a MCU for Gnuk, by free design
> of J2 (that's my wish), I will happily port Gnuk and NeuG
> *immediately*.  Well, please include a simple ADC for the source of
> noise, then.
Yup. That could be useful, but could even be an external component
accessed via i2c/spi.

> I'm afraid that free design of SWD interface would be difficult
> because of patents (just a guess, I don't know at all).
PULP uses JTAG.

> I'm curious about free design of flash ROM controller, especially
> how protection feature is implemented.
Is it implemented? :)
Seriously, if it comes to decapping, there are very few secure chips
around, and they mostly rely on security by obscurity. :(

BYtE,
 Diego