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'[ARM] BBC micro:bit nRF51822 impressions'
2017\11\07@002835 by James Cameron

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For a primary school teaching project, my wife and I were given two
BBC micro:bit embedded systems.  They've been around since 2015, but
this is the first time I've used them.

One of my regular irritations in new designs is startup time.  Complex
firmware bootloaders slow things down.

So I used Atom and PlatformIO to code a blinky, and looked at the time
between 3.3V power and I/O pin rise.  It is 2.5ms, which is quite
nice.

http://dev.laptop.org/~quozl/20171107-bbc-microbit-startup.png

Looking into it, there are two microcontrollers; the Nordic nRF51822
runs the application, and an NXP KL26Z is used as the USB interface.

https://en.wikipedia.org/wiki/Micro_Bit

-- James Cameron
http://quozl.netrek.org/
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2017\11\09@082711 by Kevin McGuinness

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I had heard of the BBC educational computer from the 80's but I didn't know
it was released more recently.

How would you compare it to an Arduino as an educational tool?

On 7 November 2017 at 06:28, James Cameron <spam_OUTquozlTakeThisOuTspamlaptop.org> wrote:

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2017\11\10@023048 by James Cameron

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Guess one could compare several dimensions of a phase space ...

- CPU speed,

- RAM,

- Flash,

- included peripherals in CPU,

- included peripherals on PCB,

- diversity of development environments across operating systems,

- power options,

- prototyping connectivity.

In every dimension the BBC micro:bit is superior to an Arduino Uno,
which is the other device I'm teaching with.  But perhaps more
comparable to an Arduino 101 or MKR1000.

On Thu, Nov 09, 2017 at 02:27:06PM +0100, Kevin McGuinness wrote:
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http://quozl.netrek.org/
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