From 34193c5b099f8912cae1b9da0e81b5126d936532 Mon Sep 17 00:00:00 2001
From: PA4WDH
Date: Wed, 3 Aug 2022 16:39:23 +0200
Subject: Initial commit

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+<h1>rpi-pico</h1>
+<p>
+ This is an overlay voor the Gentoo Linux distribution, it provides an ebuild
+ for the
+ <a href="https://raspberrypi.github.io/pico-sdk-doxygen/">Raspberry Pi Pico
+  SDK</a>.
+</p>
+<h2>Why this overlay?</h2>
+<p>
+ I recently got interested in the
+ <a href="https://www.raspberrypi.com/products/raspberry-pi-pico/">Raspberry Pi
+  Pico</a> and the SDK is not in the main portage tree. Usual instructions tell
+ you to install it in your home directory, but in my opinion software like this
+ should be managed by your package manager so i started writing an ebuild. I'm
+ sharing this to help other Gentoo users.
+</p>
+<h2>What is in this overlay?</h2>
+<p>
+ This overlay provides a single package: dev-utils/pico-sdk. It installs the
+ SDK under /opt/pico-sdk-&lt;version&gt; and a symlink /opt/pico-sdk. It has
+ some use flags to control which external parts get included:
+</p>
+<ul>
+ <li>cyw43: Include the cyw43 driver for the Pico W's wireless hardware</li>
+ <li>examples: Include source code examples</li>
+ <li>lwip: Include the lwip IP Stack</li>
+ <li>tinyusb: Include the tinyusb USB Stack (required for stdio over USB)</li>
+</ul>
+<p>
+ You may notice that the ebuild does depend on cross-arm-none-eabi/binutils,
+ cross-arm-none-eabi/gcc and cross-arm-none-eabi/newlib and these packages may
+ not be available on your system. You can use crossdev (sys-devel/crossdev) to
+ create them with the command: <b>crossdev -t arm-none-eabi --init-target</b>.
+</p>
+<h2>How to use this overlay?</h2>
+<p>
+ First you'll have to clone this overlay on a place you like, a common place
+ these days is <b>/var/db/repos</b>. So cd into that directory and use
+ <b>git clone https://code.pa4wdh.nl.eu.org/gentoo/rpi-pico</b>, this will
+ create a directory called rpi-pico with the overlay in it.
+</p>
+<p>
+ Next you have to make portage aware of the repo, for that you'll have to
+ create a config file under <b>/etc/portage/repos.conf</b>. Create a file
+ called <b>rpi-pico.conf</b> and give it these contents:
+</p>
+<pre>
+[rpi-pico]
+location = /var/db/repos/rpi-pico
+sync-type = git
+sync-uri = https://code.pa4wdh.nl.eu.org/gentoo/rpi-pico
+</pre>
+<p>
+ If you placed the overlay on a different place than <b>/var/db/repos</b> make
+ sure to adapt the <b>location</b> line to your needs.
+</p>
+<h2>What can i do with this?</h2>
+<p>
+ With the SDK installed you can start developing programs in the C programming
+ language for the Raspberry Pi Pico. See
+ <a href="https://github.com/raspberrypi/pico-sdk#quick-start-your-own-project">this documentation</a>
+ to learn how to start your own project. To use the SDK set <b>PICO_SDK_PATH</b>
+ to <b>/opt/pico-sdk</b> or include
+ <b>include(/opt/pico-sdk/pico_sdk_init.cmake)</b> in your
+ <b>CMakeLists.txt</b>.
+</p>
+<p>
+ If you have any feedback on this overlay, you're quite likely to find me on
+ the <a href="https://forums.gentoo.org">Gentoo forums</a>.
+</p>
+<p>
+ Have fun!
+</p>
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