Adding dactyl manuform

app/boards/shields/dactyl_manuform/Kconfig.defconfig

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+# Copyright (c) 2020 The ZMK Contributors
+# SPDX-License-Identifier: MIT
+
+if SHIELD_DACTYLMANUFORM
+
+config ZMK_KEYBOARD_NAME
+    default "dactyl_manuform"
+
+# TODO: MOVE TO PARTICLE BOARD
+config BUILD_OUTPUT_UF2
+	default y
+
+# TODO: MOVE TO PARTICLE BOARD
+config FLASH_LOAD_OFFSET 
+ 	default 0x26000
+
+config BT_CTLR
+	default BT
+
+config ZMK_BLE
+	default y
+
+config ZMK_USB
+	default y
+
+config USB_NRFX
+	default y
+
+config USB_DEVICE_STACK
+	default y
+
+# TODO: ADD SUPPORT FOR ZMK
+# config ZMK_BATTERY_VOLTAGE_DIVIDER
+# 	default y
+
+endif # SHIELD_DACTYLMANUFORM

app/boards/shields/dactyl_manuform/Kconfig.shield

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+# Copyright (c) 2020 The ZMK Contributors
+# SPDX-License-Identifier: MIT
+
+config SHIELD_DACTYLMANUFORM
+	def_bool $(shields_list_contains,dactyl_manuform)
+

app/boards/shields/dactyl_manuform/README.rst

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+=================
+Dactyl Manuform 
+=================
+
+This shield is basing on this project:
+https://github.com/abstracthat/dactyl-manuform
+
+-------------------
+Board
+-------------------
+
+I ported the Dactyl Manuform, where instead of using Pro Pico board I picked Particle Xenon.
+This board is quite cheap and easy to find in many stores. 
+Other supported boards was too pricy or unavailable in my country.
+
+^^^^^^^^^^^^^^^^^^^
+Bootloader
+^^^^^^^^^^^^^^^^^^^
+
+To make it works you need to flash your Particle with:
+https://github.com/adafruit/Adafruit_nRF52_Bootloader
+
+Why Adafruit bootloader you may ask?
+
+* MCUBOOT:
+  This bootloader is hard to use and require installation of quite big amount of tools.
+* Particle:
+  Default bootloader in other hands, require special version of nrftool and you need to use more then one button to trigger boot mode.
+  It should support binary generated here.
+* Adafruit:
+  It has all MCUBOOT functionality and also support UF2 binary format.
+
+Here you can find the step by step tutorial how to flash it.
+https://docs.particle.io/tutorials/learn-more/xenon-circuit-python/
+https://learn.adafruit.com/circuitpython-on-the-nrf52/nrf52840-bootloader
+
+-------------------
+Building
+-------------------
+
+west build -p auto -b particle_xenon  -- -DSHIELD='dactyl_manuform' 
+
+-----------------------
+Flashing with Adafruit
+-----------------------
+
+To flash device you need to trigger dfu mode on this bootloader. To do, so double click reset button.
+
+adafruit-nrfutil dfu genpkg --dev-type 0x0052 --application build/zephyr/zmk.hex dfu-package.zip
+
+adafruit-nrfutil dfu serial --package dfu-package.zip -p /dev/ttyACM0 -b 115200

app/boards/shields/dactyl_manuform/boards/particle_xenon.overlay

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+/delete-node/ &storage_partition;
+/delete-node/ &boot_partition;
+
+adafriut_flash: &flash0 {
+	/*
+	 * For more information, see:
+	 * http://docs.zephyrproject.org/latest/devices/dts/flash_partitions.html
+	 */
+	partitions {
+		compatible = "fixed-partitions";
+		#address-cells = <1>;
+		#size-cells = <1>;
+
+		sd_partition: partition@0 {
+			label = "softdevice";
+			reg = <0x00000000 0x00026000>;
+		};
+		code_partition: partition@26000 {
+			label = "code_partition";
+			reg = <0x00026000 0x000c6000>;
+		};
+
+		/*
+		* The flash starting at 0x000ec000 and ending at
+		* 0x000f3fff is reserved for use by the application.
+		*/
+
+		/*
+		* Storage partition will be used by FCB/LittleFS/NVS
+		* if enabled.
+		*/
+		storage_partition: partition@ec000 {
+			label = "storage";
+			reg = <0x000ec000 0x00008000>;
+		};
+
+		boot_partition: partition@f4000 {
+			label = "adafruit_boot";
+			reg = <0x000f4000 0x0000c000>;
+		};
+
+	};
+};
+
+/ {
+	chosen {
+		zephyr,flash = &adafriut_flash;
+		zephyr,code-partition = &code_partition;
+	};
+};

app/boards/shields/dactyl_manuform/boards/particle_xenon_deconfig

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+# SPDX-License-Identifier: MIT
+
+# Enable MPU
+CONFIG_ARM_MPU=y
+
+# enable GPIO
+CONFIG_GPIO=y
+
+CONFIG_USE_DT_CODE_PARTITION=y
+
+CONFIG_MPU_ALLOW_FLASH_WRITE=y
+CONFIG_NVS=y
+CONFIG_SETTINGS_NVS=y
+CONFIG_FLASH=y
+CONFIG_FLASH_PAGE_LAYOUT=y
+CONFIG_FLASH_MAP=y

app/boards/shields/dactyl_manuform/dactyl_manuform.keymap

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+/*
+ * Copyright (c) 2020 The ZMK Contributors
+ *
+ * SPDX-License-Identifier: MIT
+ */
+
+#include <behaviors.dtsi>
+#include <dt-bindings/zmk/keys.h>
+#include <dt-bindings/zmk/bt.h>
+#include <dt-bindings/zmk/outputs.h>
+
+/ {
+    keymap {
+        compatible = "zmk,keymap";
+
+        default_layer {
+            bindings = <
+                    &kp W       &kp E       &kp R       &kp T
+            &kp Q   &kp S       &kp D       &kp F       &kp G
+            &kp A   &kp X       &kp C       &kp V       &kp B
+            &kp Z   &kp EQUAL   &kp MINUS   &kp SPACE   &kp ESC
+                                            &kp LGUI    &kp BSPC
+                                            &kp LCTRL   &kp LALT
+            >;
+        };
+    };
+};

app/boards/shields/dactyl_manuform/dactyl_manuform.overlay

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+/*
+ * Copyright (c) 2020 Bartosz Nowak
+ *
+ * SPDX-License-Identifier: MIT
+ */
+
+#include <dt-bindings/zmk/matrix_transform.h>
+
+/ {
+	chosen {
+		zmk,kscan = &kscan0;
+		zmk,matrix_transform = &default_transform;
+	};
+
+	default_transform: keymap_transform_0 {
+		compatible = "zmk,matrix-transform";
+		columns = <5>;
+		rows = <5>;
+		map = <
+				RC(0,1) RC(0,2) RC(0,3) RC(0,4)
+			RC(1,0) RC(1,1) RC(1,2) RC(1,3) RC(1,4)
+			RC(2,0) RC(2,1) RC(2,2) RC(2,3) RC(2,4)
+			RC(3,0) RC(3,1) RC(3,2) RC(3,3) RC(3,4)
+						RC(4,3) RC(4,4)
+						RC(4,1) RC(4,2)
+
+		>;
+	};
+
+//  TODO: Switch form mesh_header to arduino header think of better way
+	kscan0: kscan_0 {
+		compatible = "zmk,kscan-gpio-matrix";
+		label = "KSCAN";
+		diode-direction = "row2col";
+		row-gpios
+			= <&mesh_header 18 (GPIO_ACTIVE_HIGH)>
+			, <&mesh_header 17 (GPIO_ACTIVE_HIGH)>
+			, <&mesh_header 16 (GPIO_ACTIVE_HIGH)>
+			, <&mesh_header 15 (GPIO_ACTIVE_HIGH)>
+			, <&mesh_header 14 (GPIO_ACTIVE_HIGH)>
+			;
+
+		col-gpios
+			= <&mesh_header 4 (GPIO_ACTIVE_HIGH | GPIO_PULL_DOWN)>
+			, <&mesh_header 5 (GPIO_ACTIVE_HIGH | GPIO_PULL_DOWN)>
+			, <&mesh_header 6 (GPIO_ACTIVE_HIGH | GPIO_PULL_DOWN)>
+			, <&mesh_header 7 (GPIO_ACTIVE_HIGH | GPIO_PULL_DOWN)>
+			, <&mesh_header 8 (GPIO_ACTIVE_HIGH | GPIO_PULL_DOWN)>
+			;
+	};
+};