zmk_mf68/app/boards/shields/zmk_uno/zmk_uno.overlay

/*
 * Copyright (c) 2022 The ZMK Contributors
 *
 * SPDX-License-Identifier: MIT
 */

#include <dt-bindings/led/led.h>
#include <dt-bindings/zmk/matrix_transform.h>

&arduino_i2c {
	status = "okay";
};

&arduino_spi {
	status = "okay";

	led_strip: ws2812@0 {
		compatible = "worldsemi,ws2812-spi";
		label = "RGB";

		/* SPI */
		reg = <0>; /* ignored, but necessary for SPI bindings */
		spi-max-frequency = <4000000>;

		/* WS2812 */
		chain-length = <7>; /* 4 underglow + 3 per-key LEDs */
		spi-one-frame = <0x70>;
		spi-zero-frame = <0x40>;

		color-mapping = <LED_COLOR_ID_GREEN LED_COLOR_ID_RED LED_COLOR_ID_BLUE>;
	};
};

/ {
	chosen {
		zmk,kscan = &kscan_matrix_comp;
		zmk,backlight = &backlight;
		zmk,underglow = &led_strip;
		zmk,matrix-transform = &matrix_transform;
	};

	// Commented out until we add more powerful power domain support
	// external_power {
	// 	compatible = "zmk,ext-power-generic";
	// 	label = "EXT_POWER";
	// 	init-delay-ms = <200>;
	// 	control-gpios = <&arduino_header 1 GPIO_ACTIVE_LOW>;
	// };

	rgb_power {
		compatible = "zmk,ext-power-generic";
		label = "EXT_POWER";
		// label = "RGB_POWER";
		init-delay-ms = <200>;
		control-gpios = <&arduino_header 1 GPIO_ACTIVE_LOW>;
	};

	backlight: gpioleds {
		compatible = "gpio-leds";
		label = "Backlight LEDs";
		gpio_led_0 {
			gpios = <&arduino_header 12 GPIO_ACTIVE_HIGH>;
			label = "Backlight LED 0";
		};
	};

	matrix_transform: matrix_transform {
		compatible = "zmk,matrix-transform";
		rows = <3>;
		columns = <4>;

		map = <
		RC(0,0) RC(0,1)
		RC(1,0) RC(1,1)
		RC(2,0) RC(2,1) RC(2,2)
		>;
	};

	direct_matrix_transform: direct_matrix_transform {
		compatible = "zmk,matrix-transform";
		rows = <3>;
		columns = <4>;

		map = <
		RC(0,0) RC(0,1)
		RC(0,2) RC(0,3)
		RC(1,0) RC(1,1) RC(1,2)
		>;
	};

	kscan_matrix_comp: kscan_matrix_comp {
		compatible = "zmk,kscan-composite";
		rows = <1>;
		columns = <7>;

		label = "KSCAN_MATRIX_COMP";

		matrix {
			kscan = <&kscan_matrix>;
		};

		toggle {
			kscan = <&kscan_sp3t_toggle>;
			row-offset = <2>;
		};

	};

	kscan_direct_comp: kscan_direct_comp {
		compatible = "zmk,kscan-composite";

		label = "KSCAN_DIRECT_COMP";
		status = "disabled";

		matrix {
			kscan = <&kscan_direct>;
		};

		toggle {
			kscan = <&kscan_sp3t_toggle>;
			row-offset = <1>;
		};

	};

	kscan_matrix: kscan_matrix {
		compatible = "zmk,kscan-gpio-matrix";

		label = "KSCAN_MATRIX";

		diode-direction = "col2row";

		col-gpios
			= <&arduino_header 10 GPIO_ACTIVE_HIGH>
			, <&arduino_header 9  GPIO_ACTIVE_HIGH>
			;

		row-gpios
			= <&arduino_header 13 (GPIO_ACTIVE_HIGH | GPIO_PULL_DOWN)>
			, <&arduino_header 11 (GPIO_ACTIVE_HIGH | GPIO_PULL_DOWN)>
			;

	};

	kscan_direct: kscan_direct {
		compatible = "zmk,kscan-gpio-direct";
		status = "disabled";

		label = "KSCAN_DIRECT";

		input-gpios
			= <&arduino_header 10 (GPIO_ACTIVE_LOW | GPIO_PULL_UP)>
			, <&arduino_header 9  (GPIO_ACTIVE_LOW | GPIO_PULL_UP)>
			, <&arduino_header 13 (GPIO_ACTIVE_LOW | GPIO_PULL_UP)>
			, <&arduino_header 11 (GPIO_ACTIVE_LOW | GPIO_PULL_UP)>
			;

	};

	kscan_sp3t_toggle: kscan_sp3t_toggle {
		compatible = "zmk,kscan-gpio-direct";
		toggle-mode;

		label = "KSCAN_TOGGLE";

		input-gpios
			= <&arduino_header 4 (GPIO_ACTIVE_LOW | GPIO_PULL_UP)>
			, <&arduino_header 3 (GPIO_ACTIVE_LOW | GPIO_PULL_UP)>
			, <&arduino_header 2 (GPIO_ACTIVE_LOW | GPIO_PULL_UP)>
			;
	};

	encoder: encoder {
		label = "ENCODER";
		resolution = <4>;
		compatible = "alps,ec11";
		a-gpios = <&arduino_header 14 GPIO_PULL_UP>;
		b-gpios = <&arduino_header 15 GPIO_PULL_UP>;
	};

	sensors {
		compatible = "zmk,keymap-sensors";
		sensors = <&encoder>;
	};

};