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<p>Looks like they are trying to compete with the Arduino market.<br>
</p>
<div class="moz-signature"><font face="Comic Sans MS"
color="#000080"> <br>
-73 - <br>
<b>Rud Merriam K5RUD</b> <br>
<a href="http://mysticlakesoftware.com/"> <i>Mystic Lake
Software</i> </a> <br>
<br>
</font>
</div>
<div class="moz-cite-prefix">On 1/21/21 10:30 AM, Doug Paradis via
DPRGlist wrote:<br>
</div>
<blockquote type="cite"
cite="mid:CAOdUW+YJ2c3VxG=hFK-GDW69+or2deVMyQ33u1g5hadSZC+zdw@mail.gmail.com">
<meta http-equiv="content-type" content="text/html; charset=UTF-8">
<div dir="ltr">-All,
<div> Another article of interest on the Rpi pico. Cost is
$4, and has micro python and C/C++ support.</div>
<div><a
href="https://www.pcmag.com/news/4-raspberry-pi-pico-launches?utm_source=email&utm_campaign=whatsnewnow&utm_medium=title"
moz-do-not-send="true">https://www.pcmag.com/news/4-raspberry-pi-pico-launches?utm_source=email&utm_campaign=whatsnewnow&utm_medium=title</a><br>
</div>
<div><br>
</div>
<div>Regards,</div>
<div>Doug P.</div>
</div>
<br>
<div class="gmail_quote">
<div dir="ltr" class="gmail_attr">On Thu, Jan 21, 2021 at 3:32
AM Murray Altheim via DPRGlist <<a
href="mailto:dprglist@lists.dprg.org" moz-do-not-send="true">dprglist@lists.dprg.org</a>>
wrote:<br>
</div>
<blockquote class="gmail_quote" style="margin:0px 0px 0px
0.8ex;border-left:1px solid rgb(204,204,204);padding-left:1ex">Summary:
There are two new, small and low-cost Raspberry Pi<br>
computer boards based on a new RP2040 chip (developed by the<br>
Raspberry Pi Foundation), now or soon to be available, along
with<br>
a new line of accessories and carrier boards. There's also two<br>
RP2040 boards from Adafruit using their Feather and ItsyBitsy<br>
form factors.<br>
<br>
----<br>
<br>
The RP2040 boards from Raspberry Pi are respectively called
the Pico<br>
and the Tiny2040 and are different from previous Raspberry Pis
in that<br>
they don't run a Linux operating system, they run either a
single C/C+<br>
or MicroPython program which is loaded (like an Arduino) over
USB.<br>
<br>
These boards are considerably smaller and lighter than other
Pis, and<br>
rather than dual-row GPIO pins their IO pins are spread around
the<br>
perimeter of the board.<br>
<br>
The Pico is about the size of an Arduino Nano:<br>
<br>
Raspberry Pi Pico<br>
<a
href="https://shop.pimoroni.com/products/raspberry-pi-pico"
rel="noreferrer" target="_blank" moz-do-not-send="true">https://shop.pimoroni.com/products/raspberry-pi-pico</a>
£3.60<br>
<a href="https://www.adafruit.com/product/4883"
rel="noreferrer" target="_blank" moz-do-not-send="true">https://www.adafruit.com/product/4883</a>
(loose headers) US$5.00<br>
<a href="https://www.adafruit.com/product/4864"
rel="noreferrer" target="_blank" moz-do-not-send="true">https://www.adafruit.com/product/4864</a>
(no headers) US$4.00<br>
<br>
Pimoroni are releasing a series of support boards for the
Pico, such<br>
as:<br>
<br>
Pico Explorer Base (LCD, mini breakboard, motor drivers,
etc.<br>
kinda nice for a small robot)<br>
<a
href="https://shop.pimoroni.com/products/pico-explorer-base"
rel="noreferrer" target="_blank" moz-do-not-send="true">https://shop.pimoroni.com/products/pico-explorer-base</a>
£22.20<br>
<br>
Pico Breakout Garden Base<br>
<a
href="https://shop.pimoroni.com/products/pico-breakout-garden-base"
rel="noreferrer" target="_blank" moz-do-not-send="true">https://shop.pimoroni.com/products/pico-breakout-garden-base</a>
£12<br>
<br>
The latter provides 4 I2C and 2 SPI sockets for their Breakout
Garden<br>
series of sensors, displays, etc.<br>
<br>
The Tiny is about the size of a postage stamp, with 12 IO
pins, 4 as<br>
optional 12-bit ADC channels:<br>
<br>
Tiny 2040<br>
<a href="https://shop.pimoroni.com/products/tiny-2040"
rel="noreferrer" target="_blank" moz-do-not-send="true">https://shop.pimoroni.com/products/tiny-2040</a>
£8.40<br>
<br>
[It's notably more expensive than the Pico.]<br>
<br>
Adafruit has also packaged the RP2040 in both their Feather
and<br>
ItsyBitsy form factors:<br>
<br>
Adafruit Feather RP2040<br>
<a href="https://www.adafruit.com/product/4884"
rel="noreferrer" target="_blank" moz-do-not-send="true">https://www.adafruit.com/product/4884</a>
NA (yet)<br>
Adafruit ItsyBitsy RP2040<br>
<a href="https://www.adafruit.com/product/4888"
rel="noreferrer" target="_blank" moz-do-not-send="true">https://www.adafruit.com/product/4888</a>
NA (yet)<br>
<br>
Here's a description of the 2040 CPU:<br>
<br>
About the RP2040<br>
<br>
The RP2040 microcontroller is a dual core ARM Cortex M0+
running at<br>
up to 133Mhz. It bundles in 264kB of SRAM, 30
multifunction GPIO<br>
pins (including a four channel 12-bit ADC), a heap of
standard<br>
peripherals (I2C, SPI, UART, PWM, clocks, etc), and USB
support.<br>
<br>
One very exciting feature of the RP2040 microcontroller
are the<br>
programmable IOs which allow you to execute custom
programs that<br>
can manipulate GPIO pins and transfer data between
peripherals -<br>
they can offload tasks that require high data transfer
rates or<br>
precise timing that traditionally would have required a
lot of<br>
heavy lifting from the CPU.<br>
<br>
As alluded to in that last paragraph, I'll be curious to see
how any<br>
of these RP2040 boards can be used as a slave processor when
connected<br>
to a Raspberry Pi, a topic we've been discussing a fair bit
lately. In<br>
the SDK documentation there's sections on how to connect to an
RP2040<br>
board from a Raspberry Pi over USB or GPIO, and how to connect
to a Mac<br>
over USB. It looks like the GPIO connection is over UART.<br>
<br>
The Pimoroni Pico product page at:<br>
<br>
<a
href="https://shop.pimoroni.com/products/raspberry-pi-pico"
rel="noreferrer" target="_blank" moz-do-not-send="true">https://shop.pimoroni.com/products/raspberry-pi-pico</a><br>
<br>
has a section at the bottom with links to some fairly
extensive<br>
documentation:<br>
<br>
* Raspberry Pi Pico Datasheet - An RP2040-based
microcontroller board<br>
* RP2040 Datasheet - A microcontroller by Raspberry Pi<br>
* Hardware design with the RP2040 - Using the RP2040
microcontroller<br>
to build boards and products<br>
* Getting Started with Raspberry Pi Pico - C/C++
development with<br>
the Pico and other RP2040-based microcontroller boards<br>
* Pico C/C++ SDK - Libraries and tools for C/C++
development on the<br>
RP2040 microcontroller<br>
* Pico Python SDK - A MicroPython environment for the
RP2040<br>
microcontroller<br>
<br>
Quite exciting!<br>
<br>
Cheers,<br>
<br>
Murray<br>
<br>
[Legal Notice: I hold no fiduciary interest in Pimoroni,
Adafruit,<br>
<a href="http://foamtiles.com" rel="noreferrer"
target="_blank" moz-do-not-send="true">foamtiles.com</a> or
any other electronics or foam tile wholesale or retail<br>
establishment.]<br>
...........................................................................<br>
Murray Altheim <murray18 at altheim dot com>
= = ===<br>
<a href="http://www.altheim.com/murray/" rel="noreferrer"
target="_blank" moz-do-not-send="true">http://www.altheim.com/murray/</a>
=== ===<br>
= = ===<br>
In the evening<br>
The rice leaves in the garden<br>
Rustle in the autumn wind<br>
That blows through my reed hut.<br>
-- Minamoto no Tsunenobu<br>
<br>
<br>
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