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feat(boards): Add initial Ferris 0.2 board definition.
* Onboard stm32f072, mcp23017 expander. * Underglow not yet supported. * Keymap is Miryoku inspired, but for less thumbs
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‎.github/workflows/build.yml‎

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include:
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- board: bdn9_rev2
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- board: dz60rgb_rev1
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- board: ferris_rev02
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- board: nrf52840_m2
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shield: m60
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- board: planck_rev6

‎app/boards/arm/ferris/CMakeLists.txt‎

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# SPDX-License-Identifier: Apache-2.0
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if(CONFIG_PINMUX)
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zephyr_library()
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zephyr_library_sources(pinmux.c)
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zephyr_library_include_directories(${ZEPHYR_BASE}/drivers)
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endif()

‎app/boards/arm/ferris/Kconfig.board‎

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# Ferris board configuration
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# Copyright (c) 2020 The ZMK Contributors
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# SPDX-License-Identifier: MIT
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config BOARD_FERRIS
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bool "Ferris rev 0.2"
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depends on SOC_STM32F072XB

‎app/boards/arm/ferris/Kconfig.defconfig‎

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# Ferris board configuration
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# Copyright (c) 2020 The ZMK Contributors
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# SPDX-License-Identifier: MIT
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if BOARD_FERRIS
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config BOARD
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default "ferris_rev02"
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config ZMK_KEYBOARD_NAME
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default "Ferris rev 0.2"
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config ZMK_USB
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default y
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config ZMK_KSCAN_MATRIX_POLLING
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default y
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config ZMK_KSCAN_COMPOSITE_DRIVER
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default y
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endif # BOARD_FERRIS

‎app/boards/arm/ferris/README.md‎

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# Building ZMK for the Ferris 0.2
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## Standard Build
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```
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west build -p -d build/ferris --board ferris_rev02
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```
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## Flashing
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`west` can be used to flash the board directly. Press the reset button once, and run:
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```
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west flash -d build/ferris
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```

‎app/boards/arm/ferris/board.cmake‎

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# SPDX-License-Identifier: MIT
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board_runner_args(dfu-util "--pid=0483:df11" "--alt=0" "--dfuse")
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board_runner_args(jlink "--device=STM32F072CB" "--speed=4000")
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include(${ZEPHYR_BASE}/boards/common/dfu-util.board.cmake)
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include(${ZEPHYR_BASE}/boards/common/jlink.board.cmake)

‎app/boards/arm/ferris/ferris_rev02.dts‎

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/*
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* Copyright (c) 2020 The ZMK Contributors
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*
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* SPDX-License-Identifier: MIT
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*/
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/dts-v1/;
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#include <st/f0/stm32f072Xb.dtsi>
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#include <dt-bindings/zmk/matrix_transform.h>
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/ {
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model = "Ferris rev0.2";
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compatible = "ferris,rev02", "st,stm32f072";
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chosen {
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zephyr,sram = &sram0;
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zephyr,flash = &flash0;
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zmk,kscan = &kscan;
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zmk,matrix_transform = &transform;
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/* TODO: Enable once we support the IC for underglow
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zmk,underglow = &led_strip;
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*/
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};
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transform: transform {
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compatible = "zmk,matrix-transform";
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rows = <4>;
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columns = <10>;
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map = <
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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)
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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)
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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)
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RC(3,3) RC(3,4) RC(3,5) RC(3,6)
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>;
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};
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kscan: kscan {
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compatible = "zmk,kscan-composite";
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label = "KSCAN";
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rows = <4>;
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columns = <10>;
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left {
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kscan = <&kscan_left>;
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};
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right {
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kscan = <&kscan_right>;
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column-offset = <5>;
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};
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};
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kscan_left: kscan_left {
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compatible = "zmk,kscan-gpio-matrix";
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label = "KSCAN_LEFT";
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diode-direction = "col2row";
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col-gpios
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= <&gpiob 8 (GPIO_ACTIVE_HIGH)>
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, <&gpiob 4 (GPIO_ACTIVE_HIGH)>
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, <&gpiob 3 (GPIO_ACTIVE_HIGH)>
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, <&gpioa 15 (GPIO_ACTIVE_HIGH)>
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, <&gpioa 14 (GPIO_ACTIVE_HIGH)>
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;
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row-gpios
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= <&gpiob 7 (GPIO_ACTIVE_HIGH | GPIO_PULL_DOWN)>
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, <&gpiob 6 (GPIO_ACTIVE_HIGH | GPIO_PULL_DOWN)>
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, <&gpiob 5 (GPIO_ACTIVE_HIGH | GPIO_PULL_DOWN)>
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, <&gpioa 2 (GPIO_ACTIVE_HIGH | GPIO_PULL_DOWN)>
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;
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};
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kscan_right: kscan_right {
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compatible = "zmk,kscan-gpio-matrix";
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label = "KSCAN_RIGHT";
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diode-direction = "row2col";
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col-gpios
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= <&right_io 0 (GPIO_ACTIVE_LOW | GPIO_PULL_UP)>
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, <&right_io 1 (GPIO_ACTIVE_LOW | GPIO_PULL_UP)>
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, <&right_io 2 (GPIO_ACTIVE_LOW | GPIO_PULL_UP)>
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, <&right_io 3 (GPIO_ACTIVE_LOW | GPIO_PULL_UP)>
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, <&right_io 4 (GPIO_ACTIVE_LOW | GPIO_PULL_UP)>
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;
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row-gpios
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= <&right_io 8 (GPIO_ACTIVE_LOW)>
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, <&right_io 9 (GPIO_ACTIVE_LOW)>
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, <&right_io 10 (GPIO_ACTIVE_LOW)>
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, <&right_io 11 (GPIO_ACTIVE_LOW)>
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;
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};
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};
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&i2c2 {
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status = "okay";
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clock-frequency = <I2C_BITRATE_FAST>;
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right_io: mcp23017@20 {
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compatible = "microchip,mcp23017";
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status = "okay";
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gpio-controller;
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reg = <0x20>;
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label = "RIGHT_IO";
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#gpio-cells = <2>;
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ngpios = <16>;
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};
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};
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&usb {
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status = "okay";
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};
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&rtc {
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status = "okay";
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};
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&flash0 {
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/*
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* For more information, see:
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* http://docs.zephyrproject.org/latest/guides/dts/index.html#flash-partitions
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*/
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partitions {
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compatible = "fixed-partitions";
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#address-cells = <1>;
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#size-cells = <1>;
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/* Set 6Kb of storage at the end of the 128Kb of flash */
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storage_partition: partition@3e800 {
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label = "storage";
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reg = <0x0001e800 0x00001800>;
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};
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};
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};

‎app/boards/arm/ferris/ferris_rev02.keymap‎

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/*
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* Copyright (c) 2020 The ZMK Contributors
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*
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* SPDX-License-Identifier: MIT
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*/
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#include <behaviors.dtsi>
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#include <dt-bindings/zmk/keys.h>
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#include <dt-bindings/zmk/bt.h>
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#define NAV_L 1
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#define OTHER_L 2
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#define NUM_L 3
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#define SYM_L 4
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// Using layer taps on thumbs, having quick tap as well helps w/ repeating space/backspace
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&lt { quick_tap_ms = <200>; };
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/ {
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behaviors {
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hm: homerow_mods {
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compatible = "zmk,behavior-hold-tap";
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label = "homerow mods";
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#binding-cells = <2>;
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tapping_term_ms = <200>;
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flavor = "tap-preferred";
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bindings = <&kp>, <&kp>;
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};
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};
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keymap {
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compatible = "zmk,keymap";
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default_layer {
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bindings = <
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&kp Q &kp W &kp E &kp R &kp T &kp Y &kp U &kp I &kp O &kp P
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&hm LGUI A &hm LALT S &hm LCTRL D &hm LSHFT F &kp G &kp H &hm RSHFT J &hm RCTRL K &hm LALT L &hm LGUI QUOT
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&kp Z &kp X &kp C &kp V &kp B &kp N &kp M &kp COMMA &kp DOT &kp FSLH
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&lt NAV_L TAB &kp ENTER &lt NUM_L SPACE &lt SYM_L BKSP
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>;
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};
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nav_layer {
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bindings = <
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&trans &trans &trans &trans &trans &trans &trans &trans &trans &trans
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&trans &trans &trans &trans &trans &trans &kp LARW &kp DARW &kp UARW &kp RARW
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&trans &trans &trans &trans &trans &trans &kp HOME &kp PG_DN &kp PG_UP &kp END
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&trans &trans &kp ESC &kp DEL
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>;
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};
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other_layer {
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bindings = <
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&trans &trans &trans &trans &trans &trans &trans &trans &trans &trans
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&trans &trans &trans &trans &trans &trans &trans &trans &trans &trans
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&trans &trans &trans &trans &trans &trans &kp HOME &trans &trans &trans
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&trans &trans &trans &trans
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>;
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};
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num_layer {
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bindings = <
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&kp LBKT &kp N7 &kp N8 &kp N9 &kp RBKT &trans &trans &trans &trans &trans
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&kp SEMI &kp N4 &kp N5 &kp N6 &kp EQUAL &trans &trans &trans &trans &trans
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&kp GRAVE &kp N1 &kp N2 &kp N3 &kp BSLH &trans &trans &trans &trans &trans
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&kp N0 &kp MINUS &trans &trans
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>;
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};
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sym_layer {
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bindings = <
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&kp LBRC &kp LS(N7) &kp LS(N8) &kp LS(N9) &kp RBRC &trans &trans &trans &trans &trans
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&kp COLON &kp LS(N4) &kp LS(N5) &kp LS(N6) &kp PLUS &trans &trans &trans &trans &trans
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&kp TILDE &kp LS(N1) &kp LS(N2) &kp LS(N3) &kp LS(BSLH) &trans &trans &trans &trans &trans
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&kp LS(N0) &kp UNDER &trans &trans
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>;
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};
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};
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};

‎app/boards/arm/ferris/ferris_rev02.yaml‎

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identifier: ferris_rev02
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name: Ferris 0.2
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type: mcu
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arch: arm
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toolchain:
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- zephyr
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- gnuarmemb
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- xtools
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ram: 40
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supported:
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- switches
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- underglow

‎app/boards/arm/ferris/ferris_rev02_defconfig‎

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# SPDX-License-Identifier: MIT
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CONFIG_BOARD_FERRIS=y
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CONFIG_SOC_SERIES_STM32F0X=y
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CONFIG_SOC_STM32F072XB=y
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# 48MHz system clock
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CONFIG_SYS_CLOCK_HW_CYCLES_PER_SEC=48000000
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# enable PINMUX
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CONFIG_PINMUX=y
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# enable GPIO
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CONFIG_GPIO=y
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# Enable i2c
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CONFIG_I2C=y
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# ZMK Settings
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CONFIG_ZMK_USB=y
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CONFIG_ZMK_KSCAN_GPIO_DRIVER=y
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CONFIG_ZMK_KSCAN_COMPOSITE_DRIVER=y
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CONFIG_ZMK_KSCAN_MATRIX_POLLING=y
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CONFIG_USB_SELF_POWERED=n
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# Enable IO multiplexer
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CONFIG_GPIO_MCP23017=y
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# Needed to reduce this to size that will fit on F072
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CONFIG_HEAP_MEM_POOL_SIZE=1024
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# clock configuration
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CONFIG_CLOCK_CONTROL=y
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# Clock configuration for Cube Clock control driver
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CONFIG_CLOCK_STM32_SYSCLK_SRC_PLL=y
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# use HSI as PLL input
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CONFIG_CLOCK_STM32_PLL_SRC_HSI=y
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# produce 48MHz clock at PLL output
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# CONFIG_CLOCK_STM32_PLL_PREDIV=1
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CONFIG_CLOCK_STM32_PLL_MULTIPLIER=6
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CONFIG_CLOCK_STM32_AHB_PRESCALER=1
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CONFIG_CLOCK_STM32_APB1_PRESCALER=1
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# CONFIG_CLOCK_STM32_APB2_PRESCALER=1

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