Add an ez_maker directpins for rp2040 (#17908)

* Add an ez_maker directpins for rp2040

This allows all exposed pins on the Raspberry Pi Pico to be used
as up to 26 individual keys. Keys use a common ground arrangement.

The firmware is also expected to work on generic RP2040 boards, check
manufacturer pinout diagrams or use trial and error to find out the GP#s
of the pins.

* Update keyboards/ez_maker/directpins/rp2040/info.json

Co-authored-by: Joel Challis <git@zvecr.com>

* Changes based on review comments

Co-authored-by: Joel Challis <git@zvecr.com>

1 files changed, 19 insertions, 0 deletions

diff --git a/keyboards/ez_maker/directpins/rp2040/readme.md b/keyboards/ez_maker/directpins/rp2040/readme.md
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+# DirectPins
+
+![Raspberry Pi Pico pinout guide](https://learn.adafruit.com/getting-started-with-raspberry-pi-pico-circuitpython/pinouts)
+
+Easily assign keys to pins for your custom project using QMK Configurator.
+
+* Keyboard Maintainer: [Jeff Epler](https://github.com/jepler)
+* Hardware Supported: Raspberry Pi Pico, other RP2040 boards
+* Hardware Availability: Raspberry Pi, SparkFun, Adafruit, other makers
+
+Make example for this keyboard (after setting up your build environment):
+
+    qmk compile -kb ez_maker/directpins/rp2040 -km default
+
+Flashing example for this keyboard:
+
+    qmk flash -kb ez_maker/directpins/rp2040 -km default
+
+See the [build environment setup](https://docs.qmk.fm/#/getting_started_build_tools) and the [make instructions](https://docs.qmk.fm/#/getting_started_make_guide) for more information. Brand new to QMK? Start with our [Complete Newbs Guide](https://docs.qmk.fm/#/newbs).