Initial configuration for the Pseudacris board

app/boards/arm/pseudacris/Kconfig

@@ -0,0 +1,13 @@
+# Copyright (c) 2022 Tony Grosinger
+# SPDX-License-Identifier: MIT
+
+config BOARD_ENABLE_DCDC
+	bool "Enable DCDC mode"
+	select SOC_DCDC_NRF52X
+	default y
+	depends on BOARD_PSEUDACRIS
+
+config BOARD_ENABLE_CHARGER
+	bool "Enable battery charger"
+	default y
+	depends on (BOARD_PSEUDACRIS)

app/boards/arm/pseudacris/Kconfig.board

@@ -0,0 +1,6 @@
+# Copyright (c) 2022 Tony Grosinger
+# SPDX-License-Identifier: MIT
+
+config BOARD_PSEUDACRIS
+	bool "pseudacris"
+	depends on SOC_NRF52840_QIAA

app/boards/arm/pseudacris/Kconfig.defconfig

@@ -0,0 +1,31 @@
+# Copyright (c) 2022 Tony Grosinger
+# SPDX-License-Identifier: MIT
+
+if BOARD_PSEUDACRIS
+
+config ZMK_KEYBOARD_NAME
+	default "pseudacris"
+
+if USB_DEVICE_STACK
+
+config USB_NRFX
+	default y
+
+endif # USB_DEVICE_STACK
+
+config BT_CTLR
+	default BT
+
+config ZMK_BLE
+	default y
+
+config ZMK_USB
+	default y
+
+config PINMUX
+	default y
+
+config BOARD_ENABLE_CHARGER
+	default y
+
+endif # BOARD_PSEUDACRIS

app/boards/arm/pseudacris/README.md

@@ -0,0 +1,15 @@
+# Pseudacris
+
+Pseudacris is a hotswap 30% keyboard made by Tony Grosinger.
+
+More details, including the BOM and PCB files can be found at https://git.sr.ht/~tgrosinger/keyboards/tree/main/item/pseudacris
+
+## Building Pseudacris ZMK firmware
+
+```bash
+# From in this repo
+cd app
+west build -p -b pseudacris
+
+# Built firmware output to app/build/zephyr/zmk.uf2
+```

app/boards/arm/pseudacris/board.cmake

@@ -0,0 +1,7 @@
+# Copyright (c) 2022 Tony Grosinger
+# SPDX-License-Identifier: MIT
+
+set(OPENOCD_NRF5_SUBFAMILY nrf52)
+board_runner_args(nrfjprog "--nrf-family=NRF52" "--softreset")
+include(${ZEPHYR_BASE}/boards/common/nrfjprog.board.cmake)
+include(${ZEPHYR_BASE}/boards/common/openocd-nrf5.board.cmake)

app/boards/arm/pseudacris/pinmux.c

@@ -0,0 +1,29 @@
+/*
+ * Copyright (c) 2020 The ZMK Contributors
+ *
+ * SPDX-License-Identifier: MIT
+ */
+
+#include <kernel.h>
+#include <device.h>
+#include <init.h>
+#include <drivers/gpio.h>
+#include <sys/sys_io.h>
+#include <devicetree.h>
+
+static int pinmux_pseudacris_init(const struct device *port) {
+    ARG_UNUSED(port);
+
+    const struct device *p0 = device_get_binding("GPIO_0");
+
+#if CONFIG_BOARD_ENABLE_CHARGER
+    gpio_pin_configure(p0, 5, GPIO_OUTPUT);
+    gpio_pin_set(p0, 5, 0);
+#else
+    gpio_pin_configure(p0, 5, GPIO_INPUT);
+#endif
+
+    return 0;
+}
+
+SYS_INIT(pinmux_pseudacris_init, APPLICATION, CONFIG_APPLICATION_INIT_PRIORITY);

app/boards/arm/pseudacris/pseudacris.dts

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+/*
+ * Copyright (c) 2022 Tony Grosinger
+ *
+ * SPDX-License-Identifier: MIT
+ */
+
+/dts-v1/;
+#include <nordic/nrf52840_qiaa.dtsi>
+
+#include <dt-bindings/zmk/matrix_transform.h>
+
+/ {
+	model = "pseudacris";
+	compatible = "pseudacris";
+
+	chosen {
+		zephyr,code-partition = &code_partition;
+		zephyr,sram = &sram0;
+		zephyr,flash = &flash0;
+		zephyr,console = &cdc_acm_uart;
+		zmk,kscan = &kscan0;
+		zmk,matrix_transform = &default_transform;
+	};
+
+	default_transform: keymap_transform_0 {
+		compatible = "zmk,matrix-transform";
+		columns = <10>;
+		rows = <7>;
+		map = <
+    RC(0,0) RC(0,1) RC(0,2) RC(0,3) RC(0,4) RC(3,5) RC(3,6) RC(3,7) RC(3,8) RC(3,9)
+    RC(1,0) RC(1,1) RC(1,2) RC(1,3) RC(1,4) RC(4,5) RC(4,6) RC(4,7) RC(4,8) RC(4,9)
+    RC(2,0) RC(2,1) RC(2,2) RC(2,3) RC(2,4) RC(5,5) RC(5,6) RC(5,7) RC(5,8) RC(5,9)
+            RC(6,2) RC(6,3) RC(6,4)                 RC(6,5) RC(6,6) RC(6,7)
+		>;
+	};
+
+	kscan0: kscan {
+		compatible = "zmk,kscan-gpio-matrix";
+		label = "KSCAN";
+
+		diode-direction = "row2col";
+		/*
+		 *    P0.13 - Left Matrix Top
+		 *    P0.22 - Left Matrix Middle
+		 *    P1.06 - Left Matrix Bottom
+		 *
+		 *    P0.30 - Right Matrix Top
+		 *    P0.31 - Right Matrix Middle
+		 *    P1.11 - Right Matrix Bottom
+		 *
+		 *    P0.10 - Thumbs
+		 */
+		row-gpios
+			= <&gpio0 13 (GPIO_ACTIVE_HIGH | GPIO_PULL_DOWN)>
+			, <&gpio0 22 (GPIO_ACTIVE_HIGH | GPIO_PULL_DOWN)>
+			, <&gpio1 6  (GPIO_ACTIVE_HIGH | GPIO_PULL_DOWN)>
+
+			, <&gpio0 30 (GPIO_ACTIVE_HIGH | GPIO_PULL_DOWN)>
+			, <&gpio0 31 (GPIO_ACTIVE_HIGH | GPIO_PULL_DOWN)>
+			, <&gpio1 11 (GPIO_ACTIVE_HIGH | GPIO_PULL_DOWN)>
+			
+			, <&gpio0 10 (GPIO_ACTIVE_HIGH | GPIO_PULL_DOWN)>
+			;
+
+
+		/*
+		 *    P0.09 - Left Pinky
+		 *    P1.04 - Left Ring
+		 *    P1.02 - Left Middle
+		 *    P1.00 - Left Pointer
+		 *    P0.24 - Left Inner
+
+		 *    P0.29 - Right Inner
+		 *    P0.02 - Right Pointer
+		 *    P1.13 - Right Middle
+		 *    P0.28 - Right Ring
+		 *    P0.03 - Right Pinky
+		 */
+		col-gpios
+			= <&gpio0 9  GPIO_ACTIVE_HIGH>
+			, <&gpio1 4  GPIO_ACTIVE_HIGH>
+			, <&gpio1 2  GPIO_ACTIVE_HIGH>
+			, <&gpio1 0  GPIO_ACTIVE_HIGH>
+			, <&gpio0 24 GPIO_ACTIVE_HIGH>
+
+			, <&gpio0 29 GPIO_ACTIVE_HIGH>
+			, <&gpio0 2  GPIO_ACTIVE_HIGH>
+			, <&gpio1 13 GPIO_ACTIVE_HIGH>
+			, <&gpio0 28 GPIO_ACTIVE_HIGH>
+			, <&gpio0 3  GPIO_ACTIVE_HIGH>
+			;
+	};
+
+	ext-power {
+		compatible = "zmk,ext-power-generic";
+		label = "EXT_POWER";
+		control-gpios = <&gpio1 9 GPIO_ACTIVE_HIGH>;
+	};
+};
+
+&gpiote {
+	status = "okay";
+};
+
+&gpio0 {
+	status = "okay";
+};
+
+&gpio1 {
+	status = "okay";
+};
+
+&i2c0 {
+	compatible = "nordic,nrf-twi";
+	sda-pin = <15>;
+	scl-pin = <17>;
+};
+
+&uart0 {
+	compatible = "nordic,nrf-uarte";
+	tx-pin = <6>;
+	rx-pin = <8>;
+};
+
+&usbd {
+	status = "okay";
+	cdc_acm_uart: cdc_acm_uart {
+		compatible = "zephyr,cdc-acm-uart";
+		label = "CDC_ACM_0";
+	};
+};
+
+&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>;
+		};
+	};
+};

app/boards/arm/pseudacris/pseudacris.keymap

@@ -0,0 +1,305 @@
+/*
+ * Copyright (c) 2022 Tony Grosinger
+ *
+ * SPDX-License-Identifier: MIT
+ */
+
+#include <behaviors.dtsi>
+#include <dt-bindings/zmk/keys.h>
+
+#define DEF_L 0
+#define NUM_L 1
+#define SYM_L 2
+#define TMUX_L 3
+
+// Using layer taps on thumbs, having quick tap as well helps w/ repeating space/backspace
+&lt { quick_tap_ms = <200>; };
+
+/ {
+    behaviors {
+        hm: homerow_mods {
+            compatible = "zmk,behavior-hold-tap";
+            label = "homerow mods";
+            #binding-cells = <2>;
+            tapping_term_ms = <225>;
+            flavor = "tap-preferred";
+            bindings = <&kp>, <&kp>;
+        };
+    };
+
+    combos {
+        compatible = "zmk,combos";
+        combo_backtick {
+            timeout-ms = <50>;
+            key-positions = <0 1>;
+            bindings = <&kp GRAVE>;
+        };
+        combo_esc {
+            timeout-ms = <50>;
+            key-positions = <1 11>;
+            bindings = <&kp ESC>;
+        };
+        combo_backspace {
+            timeout-ms = <50>;
+            key-positions = <11 12>;
+            bindings = <&kp BSPC>;
+        };
+        combo_tab {
+            timeout-ms = <50>;
+            key-positions = <12 13>;
+            bindings = <&kp TAB>;
+        };
+        combo_enter {
+            timeout-ms = <50>;
+            key-positions = <22 23>;
+            bindings = <&kp ENTER>;
+        };
+        combo_minus {
+            timeout-ms = <50>;
+            key-positions = <7 8>;
+            bindings = <&kp MINUS>;
+        };
+        combo_backslash {
+            timeout-ms = <50>;
+            key-positions = <8 9>;
+            bindings = <&kp BACKSLASH>;
+        };
+        combo_less_than {
+            timeout-ms = <50>;
+            key-positions = <15 16>;
+            bindings = <&kp LT>;
+        };
+        combo_greater_than {
+            timeout-ms = <50>;
+            key-positions = <17 18>;
+            bindings = <&kp GT>;
+        };
+        combo_colon {
+            timeout-ms = <50>;
+            key-positions = <16 17>;
+            bindings = <&kp COLON>;
+        };
+        combo_quote {
+            timeout-ms = <50>;
+            key-positions = <25 26>;
+            bindings = <&kp APOSTROPHE>;
+        };
+        combo_underscore {
+            timeout-ms = <50>;
+            key-positions = <26 27>;
+            bindings = <&kp UNDER>;
+        };
+    };
+
+    macros {
+        tmux_new: tmux_new {
+            label = "ZM_tmux_new";
+            compatible = "zmk,behavior-macro";
+            #binding-cells = <0>;
+            bindings
+                = <&macro_tap &kp LC(B)>
+                , <&macro_tap &kp C>
+                ;
+        };
+        tmux_zoom: tmux_zoom {
+            label = "ZM_tmux_zoom";
+            compatible = "zmk,behavior-macro";
+            #binding-cells = <0>;
+            bindings
+                = <&macro_tap &kp LC(B)>
+                , <&macro_tap &kp Z>
+                ;
+        };
+        tmux_scroll: tmux_scroll {
+            label = "ZM_tmux_scroll";
+            compatible = "zmk,behavior-macro";
+            #binding-cells = <0>;
+            bindings
+                = <&macro_tap &kp LC(B)>
+                , <&macro_tap &kp LEFT_BRACKET>
+                ;
+        };
+        tmux_pn_lt: tmux_pn_lt {
+            label = "ZM_tmux_pn_lt";
+            compatible = "zmk,behavior-macro";
+            #binding-cells = <0>;
+            bindings
+                = <&macro_tap &kp LC(B)>
+                , <&macro_tap &kp LEFT>
+                ;
+        };
+        tmux_pn_dn: tmux_pn_dn {
+            label = "ZM_tmux_pn_dn";
+            compatible = "zmk,behavior-macro";
+            #binding-cells = <0>;
+            bindings
+                = <&macro_tap &kp LC(B)>
+                , <&macro_tap &kp DOWN>
+                ;
+        };
+        tmux_pn_up: tmux_pn_up {
+            label = "ZM_tmux_pn_up";
+            compatible = "zmk,behavior-macro";
+            #binding-cells = <0>;
+            bindings
+                = <&macro_tap &kp LC(B)>
+                , <&macro_tap &kp UP>
+                ;
+        };
+        tmux_pn_rt: tmux_pn_rt {
+            label = "ZM_tmux_pn_rt";
+            compatible = "zmk,behavior-macro";
+            #binding-cells = <0>;
+            bindings
+                = <&macro_tap &kp LC(B)>
+                , <&macro_tap &kp RIGHT>
+                ;
+        };
+        tmux_wn_next: tmux_wn_next {
+            label = "ZM_tmux_wn_next";
+            compatible = "zmk,behavior-macro";
+            #binding-cells = <0>;
+            bindings
+                = <&macro_tap &kp LC(B)>
+                , <&macro_tap &kp N>
+                ;
+        };
+        tmux_wn_prev: tmux_wn_prev {
+            label = "ZM_tmux_wn_prev";
+            compatible = "zmk,behavior-macro";
+            #binding-cells = <0>;
+            bindings
+                = <&macro_tap &kp LC(B)>
+                , <&macro_tap &kp P>
+                ;
+        };
+        tmux_sp_v: tmux_sp_v {
+            label = "ZM_tmux_sp_v";
+            compatible = "zmk,behavior-macro";
+            #binding-cells = <0>;
+            bindings
+                = <&macro_tap &kp LC(B)>
+                , <&macro_tap &kp PERCENT>
+                ;
+        };
+        tmux_sp_h: tmux_sp_h {
+            label = "ZM_tmux_sp_h";
+            compatible = "zmk,behavior-macro";
+            #binding-cells = <0>;
+            bindings
+                = <&macro_tap &kp LC(B)>
+                , <&macro_tap &kp DOUBLE_QUOTES>
+                ;
+        };
+        vi_clip_cp: vi_clip_cp {
+            label = "ZM_vi_clip_cp";
+            compatible = "zmk,behavior-macro";
+            #binding-cells = <0>;
+            bindings
+                = <&macro_tap &kp DOUBLE_QUOTES>
+                , <&macro_tap &kp PLUS>
+                , <&macro_tap &kp Y>
+                ;
+        };
+        vi_clip_pst: vi_clip_pst {
+            label = "ZM_vi_clip_pst";
+            compatible = "zmk,behavior-macro";
+            #binding-cells = <0>;
+            bindings
+                = <&macro_tap &kp DOUBLE_QUOTES>
+                , <&macro_tap &kp PLUS>
+                , <&macro_tap &kp P>
+                ;
+        };
+        vi_macro: vi_macro {
+            label = "ZM_vi_macro";
+            compatible = "zmk,behavior-macro";
+            #binding-cells = <0>;
+            bindings
+                = <&macro_tap &kp AT>
+                , <&macro_tap &kp Q>
+                ;
+        };
+        vi_save: vi_save {
+            label = "ZM_vi_save";
+            compatible = "zmk,behavior-macro";
+            #binding-cells = <0>;
+            bindings
+                = <&macro_tap &kp ESC>
+                , <&macro_tap &kp COLON &kp W &kp ENTER>
+                , <&macro_tap &kp LC(T)>
+                ;
+        };
+        term_full: term_full {
+            label = "ZM_term_full";
+            compatible = "zmk,behavior-macro";
+            #binding-cells = <0>;
+            bindings
+                = <&macro_tap &kp LC(TILDE)>
+                ;
+        };
+        desk_left: desk_left {
+            label = "ZM_desk_left";
+            compatible = "zmk,behavior-macro";
+            #binding-cells = <0>;
+            bindings
+                = <&macro_tap &kp LC(LG(LEFT))>
+                ;
+        };
+        desk_right: desk_right {
+            label = "ZM_desk_right";
+            compatible = "zmk,behavior-macro";
+            #binding-cells = <0>;
+            bindings
+                = <&macro_tap &kp LC(LG(RIGHT))>
+                ;
+        };
+    };
+
+    keymap {
+        compatible = "zmk,keymap";
+
+        //      0
+        //      10
+        //      20
+
+        default_layer {
+            bindings = <
+                &kp Q      &kp W      &kp E       &kp R           &kp T        &kp Y            &kp U          &kp I       &kp O         &kp P
+                &hm LCTL A &kp S      &kp D       &kp F           &kp G        &kp H            &hm LGUI J     &kp K       &kp L         &hm RCTL SEMI
+                &hm LALT Z &kp X      &kp C       &kp V           &kp B        &kp N            &kp M          &kp COMMA   &kp DOT       &kp SLASH 
+                           &mo NUM_L  &kp LSHIFT  &kp ESC                                       &mo TMUX_L     &kp SPACE   &mo SYM_L
+            >;
+        };
+
+        num_layer {
+            label = "Num";
+            bindings = <
+                &kp N1     &kp N2     &kp N3      &kp N4          &kp N5        &kp N6          &kp N7         &kp N8      &kp N9        &kp N0
+                &trans     &desk_left &kp LG(E)   &kp LG(R)       &desk_right   &trans          &kp N4         &kp N5      &kp N6        &kp COLON
+                &kp F1     &kp F2     &kp F12     &kp F4          &kp F5        &trans          &kp N1         &kp N2      &kp N3        &kp DOT
+                           &none      &none       &none                                         &none          &none       &kp N0
+            >;
+        };
+
+        sym_layer {
+            label = "Sym";
+            bindings = <
+                &kp EXCL   &kp AT     &kp HASH    &kp DLLR        &kp PRCNT     &kp CARET       &kp AMPS       &kp ASTRK   &kp PLUS      &kp EQUAL
+                &kp COLON  &none      &kp LPAR    &kp RPAR        &none         &kp LEFT        &kp DOWN       &kp UP      &kp RIGHT     &trans
+                &none      &kp LBRC   &kp LBKT    &kp RBKT        &kp RBRC      &kp HOME        &kp PG_DN      &kp PG_UP   &kp END       &trans
+                           &none      &none       &none                                         &none          &none       &none
+            >;
+        };
+
+        tmux_layer {
+            label = "Tmux";
+            bindings = <
+                &vi_macro  &vi_save      &none       &none        &tmux_sp_v    &vi_clip_cp     &none          &none       &none         &vi_clip_pst
+                &none      &tmux_scroll  &none       &term_full   &none         &tmux_pn_lt     &tmux_pn_dn    &tmux_pn_up &tmux_pn_rt   &tmux_sp_h
+                &tmux_zoom &none         &tmux_new   &none        &none         &tmux_wn_prev   &none          &none       &tmux_wn_next &none
+                           &none         &kp DEL     &none                                      &none          &none       &none
+            >;
+        };
+    };
+};

app/boards/arm/pseudacris/pseudacris.yaml

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

app/boards/arm/pseudacris/pseudacris.zmk.yml

@@ -0,0 +1,11 @@
+file_format: "1"
+id: pseudacris
+name: pseudacris
+type: board
+arch: arm
+features:
+  - keys
+outputs:
+  - usb
+  - ble
+url: https://git.sr.ht/~tgrosinger/keyboards/tree/main/item/pseudacris

app/boards/arm/pseudacris/pseudacris_defconfig

@@ -0,0 +1,24 @@
+# Copyright (c) 2022 Tony Grosinger
+# SPDX-License-Identifier: MIT
+
+CONFIG_SOC_SERIES_NRF52X=y
+CONFIG_SOC_NRF52840_QIAA=y
+CONFIG_BOARD_PSEUDACRIS=y
+
+# Enable MPU
+CONFIG_ARM_MPU=y
+
+# enable GPIO
+CONFIG_GPIO=y
+
+CONFIG_USE_DT_CODE_PARTITION=y
+CONFIG_BUILD_OUTPUT_UF2=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_CLOCK_CONTROL_NRF=y
+CONFIG_CLOCK_CONTROL_NRF_K32SRC_RC=y

app/boards/shields/chrysemys/Kconfig.defconfig

@@ -0,0 +1,9 @@
+# Copyright (c) 2022 The ZMK Contributors
+# SPDX-License-Identifier: MIT
+
+if SHIELD_CHRYSEMYS
+
+config ZMK_KEYBOARD_NAME
+    default "Chrysemys"
+
+endif

app/boards/shields/chrysemys/Kconfig.shield

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

app/boards/shields/chrysemys/chrysemys.keymap

@@ -0,0 +1,305 @@
+/*
+ * Copyright (c) 2022 The ZMK Contributors
+ *
+ * SPDX-License-Identifier: MIT
+ */
+
+#include <behaviors.dtsi>
+#include <dt-bindings/zmk/keys.h>
+
+#define DEF_L 0
+#define NUM_L 1
+#define SYM_L 2
+#define TMUX_L 3
+
+// Using layer taps on thumbs, having quick tap as well helps w/ repeating space/backspace
+&lt { quick_tap_ms = <200>; };
+
+/ {
+    behaviors {
+        hm: homerow_mods {
+            compatible = "zmk,behavior-hold-tap";
+            label = "homerow mods";
+            #binding-cells = <2>;
+            tapping_term_ms = <225>;
+            flavor = "tap-preferred";
+            bindings = <&kp>, <&kp>;
+        };
+    };
+
+    combos {
+        compatible = "zmk,combos";
+        combo_backtick {
+            timeout-ms = <50>;
+            key-positions = <0 1>;
+            bindings = <&kp GRAVE>;
+        };
+        combo_esc {
+            timeout-ms = <50>;
+            key-positions = <1 11>;
+            bindings = <&kp ESC>;
+        };
+        combo_backspace {
+            timeout-ms = <50>;
+            key-positions = <11 12>;
+            bindings = <&kp BSPC>;
+        };
+        combo_tab {
+            timeout-ms = <50>;
+            key-positions = <12 13>;
+            bindings = <&kp TAB>;
+        };
+        combo_enter {
+            timeout-ms = <50>;
+            key-positions = <22 23>;
+            bindings = <&kp ENTER>;
+        };
+        combo_minus {
+            timeout-ms = <50>;
+            key-positions = <7 8>;
+            bindings = <&kp MINUS>;
+        };
+        combo_backslash {
+            timeout-ms = <50>;
+            key-positions = <8 9>;
+            bindings = <&kp BACKSLASH>;
+        };
+        combo_less_than {
+            timeout-ms = <50>;
+            key-positions = <15 16>;
+            bindings = <&kp LT>;
+        };
+        combo_greater_than {
+            timeout-ms = <50>;
+            key-positions = <17 18>;
+            bindings = <&kp GT>;
+        };
+        combo_colon {
+            timeout-ms = <50>;
+            key-positions = <16 17>;
+            bindings = <&kp COLON>;
+        };
+        combo_quote {
+            timeout-ms = <50>;
+            key-positions = <25 26>;
+            bindings = <&kp APOSTROPHE>;
+        };
+        combo_underscore {
+            timeout-ms = <50>;
+            key-positions = <26 27>;
+            bindings = <&kp UNDER>;
+        };
+    };
+
+    macros {
+        tmux_new: tmux_new {
+            label = "ZM_tmux_new";
+            compatible = "zmk,behavior-macro";
+            #binding-cells = <0>;
+            bindings
+                = <&macro_tap &kp LC(B)>
+                , <&macro_tap &kp C>
+                ;
+        };
+        tmux_zoom: tmux_zoom {
+            label = "ZM_tmux_zoom";
+            compatible = "zmk,behavior-macro";
+            #binding-cells = <0>;
+            bindings
+                = <&macro_tap &kp LC(B)>
+                , <&macro_tap &kp Z>
+                ;
+        };
+        tmux_scroll: tmux_scroll {
+            label = "ZM_tmux_scroll";
+            compatible = "zmk,behavior-macro";
+            #binding-cells = <0>;
+            bindings
+                = <&macro_tap &kp LC(B)>
+                , <&macro_tap &kp LEFT_BRACKET>
+                ;
+        };
+        tmux_pn_lt: tmux_pn_lt {
+            label = "ZM_tmux_pn_lt";
+            compatible = "zmk,behavior-macro";
+            #binding-cells = <0>;
+            bindings
+                = <&macro_tap &kp LC(B)>
+                , <&macro_tap &kp LEFT>
+                ;
+        };
+        tmux_pn_dn: tmux_pn_dn {
+            label = "ZM_tmux_pn_dn";
+            compatible = "zmk,behavior-macro";
+            #binding-cells = <0>;
+            bindings
+                = <&macro_tap &kp LC(B)>
+                , <&macro_tap &kp DOWN>
+                ;
+        };
+        tmux_pn_up: tmux_pn_up {
+            label = "ZM_tmux_pn_up";
+            compatible = "zmk,behavior-macro";
+            #binding-cells = <0>;
+            bindings
+                = <&macro_tap &kp LC(B)>
+                , <&macro_tap &kp UP>
+                ;
+        };
+        tmux_pn_rt: tmux_pn_rt {
+            label = "ZM_tmux_pn_rt";
+            compatible = "zmk,behavior-macro";
+            #binding-cells = <0>;
+            bindings
+                = <&macro_tap &kp LC(B)>
+                , <&macro_tap &kp RIGHT>
+                ;
+        };
+        tmux_wn_next: tmux_wn_next {
+            label = "ZM_tmux_wn_next";
+            compatible = "zmk,behavior-macro";
+            #binding-cells = <0>;
+            bindings
+                = <&macro_tap &kp LC(B)>
+                , <&macro_tap &kp N>
+                ;
+        };
+        tmux_wn_prev: tmux_wn_prev {
+            label = "ZM_tmux_wn_prev";
+            compatible = "zmk,behavior-macro";
+            #binding-cells = <0>;
+            bindings
+                = <&macro_tap &kp LC(B)>
+                , <&macro_tap &kp P>
+                ;
+        };
+        tmux_sp_v: tmux_sp_v {
+            label = "ZM_tmux_sp_v";
+            compatible = "zmk,behavior-macro";
+            #binding-cells = <0>;
+            bindings
+                = <&macro_tap &kp LC(B)>
+                , <&macro_tap &kp PERCENT>
+                ;
+        };
+        tmux_sp_h: tmux_sp_h {
+            label = "ZM_tmux_sp_h";
+            compatible = "zmk,behavior-macro";
+            #binding-cells = <0>;
+            bindings
+                = <&macro_tap &kp LC(B)>
+                , <&macro_tap &kp DOUBLE_QUOTES>
+                ;
+        };
+        vi_clip_cp: vi_clip_cp {
+            label = "ZM_vi_clip_cp";
+            compatible = "zmk,behavior-macro";
+            #binding-cells = <0>;
+            bindings
+                = <&macro_tap &kp DOUBLE_QUOTES>
+                , <&macro_tap &kp PLUS>
+                , <&macro_tap &kp Y>
+                ;
+        };
+        vi_clip_pst: vi_clip_pst {
+            label = "ZM_vi_clip_pst";
+            compatible = "zmk,behavior-macro";
+            #binding-cells = <0>;
+            bindings
+                = <&macro_tap &kp DOUBLE_QUOTES>
+                , <&macro_tap &kp PLUS>
+                , <&macro_tap &kp P>
+                ;
+        };
+        vi_macro: vi_macro {
+            label = "ZM_vi_macro";
+            compatible = "zmk,behavior-macro";
+            #binding-cells = <0>;
+            bindings
+                = <&macro_tap &kp AT>
+                , <&macro_tap &kp Q>
+                ;
+        };
+        vi_save: vi_save {
+            label = "ZM_vi_save";
+            compatible = "zmk,behavior-macro";
+            #binding-cells = <0>;
+            bindings
+                = <&macro_tap &kp ESC>
+                , <&macro_tap &kp COLON &kp W &kp ENTER>
+                , <&macro_tap &kp LC(T)>
+                ;
+        };
+        term_full: term_full {
+            label = "ZM_term_full";
+            compatible = "zmk,behavior-macro";
+            #binding-cells = <0>;
+            bindings
+                = <&macro_tap &kp LC(TILDE)>
+                ;
+        };
+        desk_left: desk_left {
+            label = "ZM_desk_left";
+            compatible = "zmk,behavior-macro";
+            #binding-cells = <0>;
+            bindings
+                = <&macro_tap &kp LC(LG(LEFT))>
+                ;
+        };
+        desk_right: desk_right {
+            label = "ZM_desk_right";
+            compatible = "zmk,behavior-macro";
+            #binding-cells = <0>;
+            bindings
+                = <&macro_tap &kp LC(LG(RIGHT))>
+                ;
+        };
+    };
+
+    keymap {
+        compatible = "zmk,keymap";
+
+        //      0
+        //      10
+        //      20
+
+        default_layer {
+            bindings = <
+                &kp Q      &kp W      &kp E       &kp R           &kp T        &kp Y            &kp U          &kp I       &kp O         &kp P
+                &hm LCTL A &kp S      &kp D       &kp F           &kp G        &kp H            &hm LGUI J     &kp K       &kp L         &hm RCTL SEMI
+                &hm LALT Z &kp X      &kp C       &kp V           &kp B        &kp N            &kp M          &kp COMMA   &kp DOT       &kp SLASH 
+                           &mo NUM_L  &kp LSHIFT  &kp ESC                                       &mo TMUX_L     &kp SPACE   &mo SYM_L
+            >;
+        };
+
+        num_layer {
+            label = "Num";
+            bindings = <
+                &kp N1     &kp N2     &kp N3      &kp N4          &kp N5        &kp N6          &kp N7         &kp N8      &kp N9        &kp N0
+                &trans     &desk_left &kp LG(E)   &kp LG(R)       &desk_right   &trans          &kp N4         &kp N5      &kp N6        &kp COLON
+                &kp F1     &kp F2     &kp F12     &kp F4          &kp F5        &trans          &kp N1         &kp N2      &kp N3        &kp DOT
+                           &none      &none       &none                                         &none          &none       &kp N0
+            >;
+        };
+
+        sym_layer {
+            label = "Sym";
+            bindings = <
+                &kp EXCL   &kp AT     &kp HASH    &kp DLLR        &kp PRCNT     &kp CARET       &kp AMPS       &kp ASTRK   &kp PLUS      &kp EQUAL
+                &kp COLON  &none      &kp LPAR    &kp RPAR        &none         &kp LEFT        &kp DOWN       &kp UP      &kp RIGHT     &trans
+                &none      &kp LBRC   &kp LBKT    &kp RBKT        &kp RBRC      &kp HOME        &kp PG_DN      &kp PG_UP   &kp END       &trans
+                           &none      &none       &none                                         &none          &none       &none
+            >;
+        };
+
+        tmux_layer {
+            label = "Tmux";
+            bindings = <
+                &vi_macro  &vi_save      &none       &none        &tmux_sp_v    &vi_clip_cp     &none          &none       &none         &vi_clip_pst
+                &none      &tmux_scroll  &none       &term_full   &none         &tmux_pn_lt     &tmux_pn_dn    &tmux_pn_up &tmux_pn_rt   &tmux_sp_h
+                &tmux_zoom &none         &tmux_new   &none        &none         &tmux_wn_prev   &none          &none       &tmux_wn_next &none
+                           &none         &kp DEL     &none                                      &none          &none       &none
+            >;
+        };
+    };
+};

app/boards/shields/chrysemys/chrysemys.overlay

@@ -0,0 +1,54 @@
+/*
+ * Copyright (c) 2022 The ZMK Contributors
+ *
+ * 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 = <10>;
+        rows = <4>;
+        map = <
+    RC(0,0) RC(0,1) RC(0,2) RC(0,3) RC(0,4) RC(0,5) RC(0,6) RC(0,7) RC(0,8) RC(0,9)
+    RC(1,0) RC(1,1) RC(1,2) RC(1,3) RC(1,4) RC(1,5) RC(1,6) RC(1,7) RC(1,8) RC(1,9)
+    RC(2,0) RC(2,1) RC(2,2) RC(2,3) RC(2,4) RC(2,5) RC(2,6) RC(2,7) RC(2,8) RC(2,9)
+            RC(3,2) RC(3,3) RC(3,4)                 RC(3,5) RC(3,6) RC(3,7)
+        >;
+    };
+
+
+    kscan0: kscan_0 {
+        compatible = "zmk,kscan-gpio-matrix";
+        label = "KSCAN";
+        diode-direction = "row2col";
+
+        col-gpios
+            = <&pro_micro 5 (GPIO_ACTIVE_HIGH | GPIO_PULL_DOWN)>
+            , <&pro_micro 6 (GPIO_ACTIVE_HIGH | GPIO_PULL_DOWN)>
+            , <&pro_micro 7 (GPIO_ACTIVE_HIGH | GPIO_PULL_DOWN)>
+            , <&pro_micro 8 (GPIO_ACTIVE_HIGH | GPIO_PULL_DOWN)>
+            , <&pro_micro 9 (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)>
+            , <&pro_micro 18 (GPIO_ACTIVE_HIGH | GPIO_PULL_DOWN)>
+            ;
+
+        row-gpios
+            = <&pro_micro 1 GPIO_ACTIVE_HIGH>
+            , <&pro_micro 2 GPIO_ACTIVE_HIGH>
+            , <&pro_micro 3 GPIO_ACTIVE_HIGH>
+            , <&pro_micro 4 GPIO_ACTIVE_HIGH>
+            ;
+    };
+};

app/boards/shields/chrysemys/chrysemys.zmk.yml

@@ -0,0 +1,8 @@
+file_format: "1"
+id: chrysemys
+name: Chrysemys
+type: shield
+url: https://git.sr.ht/~tgrosinger/keyboards/tree/main/item/chrysemys
+requires: [pro_micro]
+features:
+  - keys