Add left handed verison of artsey for the tidbit

config/boards/shields/tidbit_artsey_left/Kconfig.defconfig

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+# Copyright (c) 2021 Mike "KemoNine" Crosson
+# SPDX-License-Identifier: MIT
+
+if SHIELD_TIDBIT_ARTSEY_LEFT
+
+config ZMK_KEYBOARD_NAME
+	default "ARTSEY Tidbit L"
+
+config I2C
+	default y
+
+config SSD1306
+	default y
+
+config SSD1306_REVERSE_MODE
+	default y
+
+config LVGL_HOR_RES_MAX
+	default 128
+
+config LVGL_VER_RES_MAX
+	default 32
+
+config LVGL_VDB_SIZE
+	default 64
+
+config LVGL_DPI
+	default 148
+
+config LVGL_BITS_PER_PIXEL
+	default 1
+
+choice LVGL_COLOR_DEPTH
+	default LVGL_COLOR_DEPTH_1
+endchoice
+
+endif

config/boards/shields/tidbit_artsey_left/Kconfig.shield

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+# Copyright (c) 2021 Mike "KemoNine" Crosson
+# SPDX-License-Identifier: MIT
+
+config SHIELD_TIDBIT_ARTSEY_LEFT
+	def_bool $(shields_list_contains,tidbit_artsey_left)

config/boards/shields/tidbit_artsey_left/README.md

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+# Tidbit - Left
+
+This directory contians the ARTSEY implementation for the [Tidbit](https://nullbits.co/tidbit/).

config/boards/shields/tidbit_artsey_left/tidbit_artsey_left.conf

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+# Copyright (c) 2021 Mike "KemoNine" Crosson
+# SPDX-License-Identifier: MIT
+
+# Tune combos to allow proper ARTSEY support
+CONFIG_ZMK_COMBO_MAX_COMBOS_PER_KEY=16
+CONFIG_ZMK_COMBO_MAX_KEYS_PER_COMBO=8
+CONFIG_ZMK_COMBO_MAX_PRESSED_COMBOS=8
+
+# Enable display (layer in use is helpful)
+CONFIG_ZMK_DISPLAY=y
+
+# Turn on deep sleep
+CONFIG_ZMK_SLEEP=y
+CONFIG_ZMK_IDLE_SLEEP_TIMEOUT=900000
+
+# Set screen blanking to 15s instead of 30s
+#CONFIG_ZMK_IDLE_TIMEOUT=15000
+
+# Enable Encoders
+#CONFIG_EC11=y
+#CONFIG_EC11_TRIGGER_GLOBAL_THREAD=y

config/boards/shields/tidbit_artsey_left/tidbit_artsey_left.keymap

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+/*
+ * Copyright (c) 2021 Mike "KemoNine" Crosson
+ *
+ * SPDX-License-Identifier: MIT
+ */
+
+#include <behaviors.dtsi>
+#include <dt-bindings/zmk/keys.h>
+#include <dt-bindings/zmk/bt.h>
+
+// Enable ARTSEY Left
+#define ARTSEY_LEFT 1
+
+// ARTS Row
+#define KEY_A 8
+#define KEY_R 7
+#define KEY_T 6
+#define KEY_S 5
+// EYIO Row
+#define KEY_E 13
+#define KEY_Y 12
+#define KEY_I 11
+#define KEY_O 10
+
+// Define Offsets
+#define LEADING_NONES NONE(0,0, 5)
+#define MIDDLE_NONES NONE(0, 0, 1)
+#define TRAILING_NONES NONE(0, 0, 5)
+
+// Include main artsey.io keymap
+#include "../../../artsey.dtsi"

config/boards/shields/tidbit_artsey_left/tidbit_artsey_left.overlay

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+/*
+ * Copyright (c) 2021 Mike "KemoNine" Crosson
+ *
+ * SPDX-License-Identifier: MIT
+ */
+
+#include <dt-bindings/zmk/matrix_transform.h>
+
+/ {
+	kscan0: kscan {
+		compatible = "zmk,kscan-gpio-matrix";
+		label = "KSCAN";
+
+		diode-direction = "row2col";
+
+		row-gpios
+			= <&pro_micro_d 15 (GPIO_ACTIVE_HIGH | GPIO_PULL_DOWN)>
+			, <&pro_micro_d 7 (GPIO_ACTIVE_HIGH | GPIO_PULL_DOWN)>
+			, <&pro_micro_d 6 (GPIO_ACTIVE_HIGH | GPIO_PULL_DOWN)>
+			, <&pro_micro_d 5 (GPIO_ACTIVE_HIGH | GPIO_PULL_DOWN)>
+			, <&pro_micro_d 4 (GPIO_ACTIVE_HIGH | GPIO_PULL_DOWN)>
+			;
+
+		col-gpios
+			= <&pro_micro_a 3 (GPIO_ACTIVE_HIGH | GPIO_PULL_DOWN)>
+			, <&pro_micro_a 2 (GPIO_ACTIVE_HIGH | GPIO_PULL_DOWN)>
+			, <&pro_micro_a 1 (GPIO_ACTIVE_HIGH | GPIO_PULL_DOWN)>
+			, <&pro_micro_a 0 (GPIO_ACTIVE_HIGH | GPIO_PULL_DOWN)>
+			;
+
+	};
+
+	default_transform: keymap_transform_0 {
+		compatible = "zmk,matrix-transform";
+		columns = <4>;
+		rows = <5>;
+
+		map = <
+			RC(0,3) RC(1,3) RC(2,3) RC(3,3) RC(4,3)
+			RC(0,2) RC(1,2) RC(2,2) RC(3,2) RC(4,2)
+			RC(0,1) RC(1,1) RC(2,1) RC(3,1) RC(4,1)
+			        RC(1,0) RC(2,0) RC(3,0) RC(4,0)
+		>;
+	};
+
+	chosen {
+		zmk,kscan = &kscan0;
+		zmk,matrix_transform = &default_transform;
+	};
+};
+
+&pro_micro_i2c {
+	status = "okay";
+
+	oled: ssd1306@3c {
+		compatible = "solomon,ssd1306fb";
+		reg = <0x3c>;
+		label = "DISPLAY";
+		width = <128>;
+		height = <32>;
+		segment-offset = <0>;
+		page-offset = <0>;
+		display-offset = <0>;
+		multiplex-ratio = <31>;
+		segment-remap;
+		com-invdir;
+		com-sequential;
+		prechargep = <0x22>;
+	};
+};