Re: OT: ARM makes too much noise in my view.

On Fri, 25 Oct 2024 15:52:45 -0700, Don Y
<blockedofcourse@foo.invalid> wrote:

On 10/25/2024 3:09 PM, Uwe Bonnes wrote:

Arm has an enourmous debug infrastucture. Each risc implemenation
nearly cook there own soup. A core without debug infrastructure is
less attractive...

>
They also have a boatload of predesigned/debugged IP to offer
to their licensees.  And, a broad base of developers and fabs
already experienced, there.
>
The trend is pretty obvious -- MCUs are moving more and more
towards the market that was previously the domain of CISC CPUs.
The needs of the ever-shortening (per unit-feature) development
cycle make it clear that the processor has to do more for the
developer.  Witness the number of "memory protection" schemes
that keep popping up.  The more fine-grained they are (i.e.,
don't just protect TEXT vs DATA but, rather, *me* from *you*!),
the more advantageous to the developer.
>
[Think PoLP, KISS, encapsulation, information hiding, etc.
Even if you are the sole developer, being able to protect
one task from the actions of another is a HUGE reduction
in debug time:  "Hmmm, why this bus error?  What the hell is
X trying to do in Y's domain??"  Trust me, it is *so* much
easier to get a finished piece of code when it is the ONLY
thing you have to worry about!]
>
>

I  love the ARM cores !  Especially the ST implementations and
peripherals.

As for noise, at least ST has a spread spectrum option for
its PLLs if you wnt to enable those.

boB