feat(boards): Add rotr board.

app/boards/arm/rotr/CMakeLists.txt

@@ -0,0 +1,8 @@
+set_property(GLOBAL APPEND PROPERTY extra_post_build_commands
+  COMMAND ${PYTHON_EXECUTABLE} ${ZEPHYR_BASE}/../tools/uf2/utils/uf2conv.py
+  -c
+  -b 0x26000
+  -f 0xADA52840
+  -o ${PROJECT_BINARY_DIR}/${CONFIG_KERNEL_BIN_NAME}.uf2
+  ${PROJECT_BINARY_DIR}/${CONFIG_KERNEL_BIN_NAME}.bin
+)

app/boards/arm/rotr/Kconfig

@@ -0,0 +1,7 @@
+# SPDX-License-Identifier: MIT
+
+config BOARD_ENABLE_DCDC
+	bool "Enable DCDC mode"
+	select SOC_DCDC_NRF52X
+	default y
+	depends on BOARD_ROTR

app/boards/arm/rotr/Kconfig.board

@@ -0,0 +1,8 @@
+# ROTR board configuration
+
+# Copyright (c) 2021 Polarity Works
+# SPDX-License-Identifier: MIT
+
+config BOARD_ROTR
+	bool "ROTR"
+	depends on SOC_NRF52840_QIAA

app/boards/arm/rotr/Kconfig.defconfig

@@ -0,0 +1,36 @@
+# ROTR board configuration
+
+# Copyright (c) 2021 Polarity Works
+# SPDX-License-Identifier: MIT
+
+if BOARD_ROTR
+
+config BOARD
+	default "rotr"
+
+if USB
+
+config USB_NRFX
+	default y
+
+config USB_DEVICE_STACK
+	default y
+
+endif # USB
+
+config BT_CTLR
+	default BT
+
+config ZMK_BLE
+	default y
+
+config ZMK_USB
+	default y
+
+config ZMK_BATTERY_VOLTAGE_DIVIDER
+	default y
+
+config ZMK_KEYBOARD_NAME
+	default "ROTR"
+
+endif # BOARD_ROTR

app/boards/arm/rotr/board.cmake

@@ -0,0 +1,5 @@
+# SPDX-License-Identifier: MIT
+
+board_runner_args(nrfjprog "--nrf-family=NRF52" "--softreset")
+include(${ZEPHYR_BASE}/boards/common/blackmagicprobe.board.cmake)
+include(${ZEPHYR_BASE}/boards/common/nrfjprog.board.cmake)

app/boards/arm/rotr/rotr.dts

@@ -0,0 +1,174 @@
+/*
+ * Copyright (c) 2021 Polarity Works
+ *
+ * SPDX-License-Identifier: MIT
+ */
+
+/dts-v1/;
+#include <nordic/nrf52840_qiaa.dtsi>
+
+/ {
+	model = "ROTR";
+	compatible = "rotr";
+
+	chosen {
+		zephyr,sram = &sram0;
+		zephyr,flash = &flash0;
+		zmk,kscan = &kscan0;
+		zmk,underglow = &led_strip;
+		zephyr,code-partition = &code_partition;
+	};
+
+	kscan0: kscan {
+		compatible = "zmk,kscan-gpio-matrix";
+		label = "KSCAN";
+		diode-direction = "col2row";
+
+		row-gpios = <&gpio1 13 (GPIO_ACTIVE_HIGH | GPIO_PULL_DOWN)>;
+		col-gpios
+		= <&gpio0 2 GPIO_ACTIVE_HIGH>
+		, <&gpio0 3 GPIO_ACTIVE_HIGH>
+		, <&gpio1 15  GPIO_ACTIVE_HIGH>
+		;
+	};
+
+	ext-power {
+		compatible = "zmk,ext-power-generic";
+		label = "EXT_POWER";
+		control-gpios = <&gpio1 11 GPIO_ACTIVE_HIGH>;
+	};
+
+	sensors {
+		compatible = "zmk,keymap-sensors";
+		sensors = <&encoder0>;
+	};
+
+	vbatt {
+		compatible = "zmk,battery-voltage-divider";
+		label = "BATTERY";
+		io-channels = <&adc 2>;
+		output-ohms = <2000000>;
+		full-ohms = <(2000000 + 806000)>;
+	};
+};
+
+&adc {
+	status = "okay";
+};
+
+&gpiote {
+	status = "okay";
+};
+
+&gpio0 {
+	status = "okay";
+};
+
+&gpio1 {
+	status = "okay";
+};
+
+&i2c0 {
+	compatible = "nordic,nrf-twi";
+	sda-pin = <17>;
+	scl-pin = <20>;
+};
+
+&uart0 {
+	compatible = "nordic,nrf-uarte";
+	tx-pin = <6>;
+	rx-pin = <8>;
+};
+
+&usbd {
+	status = "okay";
+};
+
+&spi1 {
+	status = "okay";
+
+	compatible = "nordic,nrf-spim";
+	mosi-pin = <24>;
+	sck-pin = <21>;
+	miso-pin = <19>;
+
+	cs-gpios = <&gpio0 10 GPIO_ACTIVE_LOW>;
+
+	encoder0: encoder@0 {
+		compatible = "magalpha,ma730";
+		label = "KNOB";
+
+		a-gpios = <&gpio1 6 (GPIO_ACTIVE_HIGH | GPIO_PULL_UP)>;
+		b-gpios = <&gpio1 0 (GPIO_ACTIVE_HIGH | GPIO_PULL_UP)>;
+
+		reg = <0>;
+		spi-max-frequency = <25000000>;
+
+		resolution = <8>; //degrees per keypress
+	};
+};
+
+
+&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>;
+		};
+	};
+};
+
+
+&spi2 {
+	compatible = "nordic,nrf-spim";
+	status = "okay";
+	mosi-pin = <5>;
+	// Unused pins, needed for SPI definition, but not used by the ws2812 driver itself.
+	sck-pin = <6>;
+	miso-pin = <7>;
+
+	led_strip: ws2812@0 {
+		compatible = "worldsemi,ws2812-spi";
+		label = "WS2812";
+
+		/* SPI */
+		reg = <0>;
+		spi-max-frequency = <4000000>;
+
+		/* WS2812 */
+		chain-length = <3>; /* number of LEDs */
+		spi-one-frame = <0x70>;
+		spi-zero-frame = <0x40>;
+	};
+};

app/boards/arm/rotr/rotr.keymap

@@ -0,0 +1,19 @@
+#include <behaviors.dtsi>
+#include <dt-bindings/zmk/keys.h>
+#include <dt-bindings/zmk/rgb.h>
+
+&inc_dec_cp {
+	triggers-per-rotation = <4>;
+};
+
+/ {
+	keymap {
+		compatible = "zmk,keymap";
+
+		default_layer {
+			//PREV | PLAY/PAUSE | NEXT
+			bindings = <&bootloader &rgb_ug RGB_TOG &kp C_VOL_DN>;
+			sensor-bindings = <&inc_dec_kp C_VOL_UP C_VOL_DN>;
+		};
+	};
+};

app/boards/arm/rotr/rotr.yaml

@@ -0,0 +1,15 @@
+identifier: rotr
+name: ROTR
+type: mcu
+arch: arm
+toolchain:
+  - zephyr
+  - gnuarmemb
+  - xtools
+supported:
+  - adc
+  - usb_device
+  - ble
+  - ieee802154
+  - pwm
+  - watchdog

app/boards/arm/rotr/rotr_defconfig

@@ -0,0 +1,29 @@
+# SPDX-License-Identifier: MIT
+
+CONFIG_SOC_SERIES_NRF52X=y
+CONFIG_SOC_NRF52840_QIAA=y
+CONFIG_BOARD_ROTR=y
+
+# Enable MPU
+CONFIG_ARM_MPU=y
+
+# enable GPIO
+CONFIG_GPIO=y
+
+CONFIG_MA730=y
+CONFIG_MA730_TRIGGER_GLOBAL_THREAD=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
+
+CONFIG_ZMK_RGB_UNDERGLOW=y
+# Use the STRIP config specific to the LEDs you're using
+CONFIG_WS2812_STRIP=y
+CONFIG_ZMK_RGB_UNDERGLOW_SAT_START=50
+CONFIG_BT_CTLR_TX_PWR_PLUS_8=y

app/prj.conf

@@ -0,0 +1,2 @@
+# Turn on logging, and set ZMK logging to debug output
+CONFIG_ZMK_USB_LOGGING=y