Add support for Knob Goblin shield

app/boards/shields/knob_goblin/Kconfig.defconfig

@@ -0,0 +1,45 @@
+# Copyright (c) 2022 The ZMK Contributors
+# SPDX-License-Identifier: MIT
+
+if SHIELD_KNOB_GOBLIN
+
+config ZMK_KEYBOARD_NAME
+  default "Knob Goblin"
+
+if ZMK_DISPLAY
+
+config I2C
+  default y
+
+config SSD1306
+  default y
+
+config SSD1306_REVERSE_MODE
+  default y
+
+endif # ZMK_DISPLAY
+
+if LVGL
+
+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 # LVGL
+
+endif # SHIELD_KNOB_GOBLIN

app/boards/shields/knob_goblin/Kconfig.shield

@@ -0,0 +1,5 @@
+# Copyright (c) 2022 The ZMK Contributors
+# SPDX-License-Identifier: MIT
+
+config SHIELD_KNOB_GOBLIN
+  def_bool $(shields_list_contains,knob_goblin)

app/boards/shields/knob_goblin/knob_goblin.conf

@@ -0,0 +1,9 @@
+# Copyright (c) 2022 The ZMK Contributors
+# SPDX-License-Identifier: MIT
+
+# Uncomment to enable Encoders
+CONFIG_EC11=y
+CONFIG_EC11_TRIGGER_GLOBAL_THREAD=y
+
+# Uncomment the following line to enable the Knob Goblin OLED Display
+CONFIG_ZMK_DISPLAY=y

app/boards/shields/knob_goblin/knob_goblin.keymap

@@ -0,0 +1,40 @@
+/*
+ * Copyright (c) 2022 The ZMK Contributors
+ *
+ * SPDX-License-Identifier: MIT
+ */
+
+#include <behaviors.dtsi>
+#include <dt-bindings/zmk/keys.h>
+#include <dt-bindings/zmk/bt.h>
+
+/ {
+    keymap {
+        compatible = "zmk,keymap";
+
+        default_layer {
+
+            bindings = <
+    &trans           &kp EQUAL       &kp KP_SLASH    &kp KP_MULTIPLY &kp KP_MINUS
+    &trans           &kp KP_NUMBER_7 &kp KP_NUMBER_8 &kp KP_NUMBER_9 &kp KP_PLUS
+    &trans           &kp KP_NUMBER_4 &kp KP_NUMBER_5 &kp KP_NUMBER_6 &kp KP_PLUS
+    &kp C_PLAY_PAUSE &kp KP_NUMBER_1 &kp KP_NUMBER_2 &kp KP_NUMBER_3 &kp KP_ENTER
+    &kp C_MUTE       &mo 1           &kp KP_NUMBER_0 &kp KP_DOT      &kp KP_ENTER
+            >;
+
+            sensor-bindings = <&inc_dec_kp C_VOL_UP C_VOL_DN &inc_dec_kp PG_UP PG_DN>;
+        };
+
+        num_layer {
+            bindings = <
+    &trans   &bt BT_CLR      &bt BT_SEL 0   &bt BT_SEL 1     &bt BT_SEL 2
+    &trans   &kp HOME        &trans         &kp PAGE_UP      &trans
+    &trans   &kp END         &kp UP_ARROW   &kp PAGE_DOWN    &trans
+    &trans   &kp LEFT_ARROW  &kp DOWN_ARROW &kp RIGHT_ARROW  &kp SPACE
+    &trans   &trans          &kp BACKSPACE  &kp DELETE       &trans
+            >;
+
+        };
+    };
+};
+

app/boards/shields/knob_goblin/knob_goblin.overlay

@@ -0,0 +1,79 @@
+/*
+ * Copyright (c) 2022 The ZMK Contributors
+ *
+ * SPDX-License-Identifier: MIT
+ */
+
+#include <dt-bindings/zmk/matrix_transform.h>
+
+/ {
+    chosen {
+        zmk,kscan = &kscan0;
+    };
+
+    kscan0: kscan {
+        compatible = "zmk,kscan-gpio-matrix";
+        label = "KSCAN";
+        diode-direction = "col2row";
+
+         row-gpios
+            = <&pro_micro  4 (GPIO_ACTIVE_HIGH | GPIO_PULL_DOWN)>
+            , <&pro_micro 10 (GPIO_ACTIVE_HIGH | GPIO_PULL_DOWN)>
+            , <&pro_micro 16 (GPIO_ACTIVE_HIGH | GPIO_PULL_DOWN)>
+            , <&pro_micro 14 (GPIO_ACTIVE_HIGH | GPIO_PULL_DOWN)>
+            , <&pro_micro 15 (GPIO_ACTIVE_HIGH | GPIO_PULL_DOWN)>
+            ;
+
+        col-gpios
+            = <&pro_micro 9 GPIO_ACTIVE_HIGH>
+            , <&pro_micro 8 GPIO_ACTIVE_HIGH>
+            , <&pro_micro 7 GPIO_ACTIVE_HIGH>
+            , <&pro_micro 6 GPIO_ACTIVE_HIGH>
+            , <&pro_micro 5 GPIO_ACTIVE_HIGH>
+            ;
+    };
+
+    top_encoder: encoder_top {
+        compatible = "alps,ec11";
+        label = "TOP_ENCODER";
+        a-gpios = <&pro_micro 19 (GPIO_ACTIVE_LOW | GPIO_PULL_UP)>;
+        b-gpios = <&pro_micro 18 (GPIO_ACTIVE_LOW | GPIO_PULL_UP)>;
+        resolution = <4>;
+        status = "okay";
+    };
+
+    bottom_encoder: encoder_bottom {
+        compatible = "alps,ec11";
+        label = "BOTTOM_ENCODER";
+        a-gpios = <&pro_micro 20 (GPIO_ACTIVE_LOW | GPIO_PULL_UP)>;
+        b-gpios = <&pro_micro 21 (GPIO_ACTIVE_LOW | GPIO_PULL_UP)>;
+        resolution = <4>;
+        status = "okay";
+    };
+
+    sensors {
+        compatible = "zmk,keymap-sensors";
+        sensors = <&top_encoder &bottom_encoder>;
+    };
+
+};
+
+&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>;
+    };
+};

app/boards/shields/knob_goblin/knob_goblin.zmk.yml

@@ -0,0 +1,11 @@
+file_format: "1"
+id: knob_goblin
+name: Knob Goblin
+type: shield
+url: https://knob-goblin.com/
+requires: [pro_micro]
+exposes: [i2c_oled]
+features:
+  - keys
+  - display
+  - encoder