feat(board): Add Ferris 0.2 boards

* Onboard stm32f072 with mcp23018 IO expander.
* No underglow support yet.
* Miryoku inspired default layout.

9 files changed, 337 insertions, 0 deletions

diff --git a/app/boards/arm/ferris/Kconfig.board b/app/boards/arm/ferris/Kconfig.board
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--- /dev/null
+++ b/app/boards/arm/ferris/Kconfig.board
@@ -0,0 +1,8 @@
+# Ferris board configuration
+
+# Copyright (c) 2020 The ZMK Contributors
+# SPDX-License-Identifier: MIT
+
+config BOARD_FERRIS
+	bool "Ferris rev 0.2"
+	depends on SOC_STM32F072XB
diff --git a/app/boards/arm/ferris/Kconfig.defconfig b/app/boards/arm/ferris/Kconfig.defconfig
new file mode 100644
index 0000000..23bc8a1
--- /dev/null
+++ b/app/boards/arm/ferris/Kconfig.defconfig
@@ -0,0 +1,23 @@
+# Ferris board configuration
+
+# Copyright (c) 2020 The ZMK Contributors
+# SPDX-License-Identifier: MIT
+
+if BOARD_FERRIS
+
+config BOARD
+	default "ferris_rev02"
+
+config ZMK_KEYBOARD_NAME
+	default "Ferris rev 0.2"
+
+config ZMK_USB
+	default y
+
+config ZMK_KSCAN_MATRIX_POLLING
+	default y
+
+config ZMK_KSCAN_COMPOSITE_DRIVER
+	default y
+
+endif # BOARD_FERRIS
diff --git a/app/boards/arm/ferris/README.md b/app/boards/arm/ferris/README.md
new file mode 100644
index 0000000..2793c6f
--- /dev/null
+++ b/app/boards/arm/ferris/README.md
@@ -0,0 +1,16 @@
+# Building ZMK for the Ferris 0.2
+
+
+## Standard Build
+
+```
+west build -p -d build/ferris --board ferris_rev02
+```
+
+## Flashing
+
+`west` can be used to flash the board directly. Press the reset button once, and run:
+
+```
+west flash -d build/ferris
+```
diff --git a/app/boards/arm/ferris/board.cmake b/app/boards/arm/ferris/board.cmake
new file mode 100644
index 0000000..4f430e1
--- /dev/null
+++ b/app/boards/arm/ferris/board.cmake
@@ -0,0 +1,7 @@
+# SPDX-License-Identifier: MIT
+
+board_runner_args(dfu-util "--pid=0483:df11" "--alt=0" "--dfuse")
+board_runner_args(jlink "--device=STM32F072CB" "--speed=4000")
+
+include(${ZEPHYR_BASE}/boards/common/dfu-util.board.cmake)
+include(${ZEPHYR_BASE}/boards/common/jlink.board.cmake)
diff --git a/app/boards/arm/ferris/ferris_rev02.dts b/app/boards/arm/ferris/ferris_rev02.dts
new file mode 100644
index 0000000..848760f
--- /dev/null
+++ b/app/boards/arm/ferris/ferris_rev02.dts
@@ -0,0 +1,139 @@
+/*
+ * Copyright (c) 2020 The ZMK Contributors
+ *
+ * SPDX-License-Identifier: MIT
+ */
+
+/dts-v1/;
+#include <st/f0/stm32f072Xb.dtsi>
+#include <st/f0/stm32f072v(8-b)tx-pinctrl.dtsi>
+
+#include <dt-bindings/zmk/matrix_transform.h>
+
+/ {
+	model = "Ferris rev0.2";
+	compatible = "ferris,rev02", "st,stm32f072";
+
+	chosen {
+		zephyr,sram = &sram0;
+		zephyr,flash = &flash0;
+		zmk,kscan = &kscan;
+		zmk,matrix_transform = &transform;
+		/* TODO: Enable once we support the IC for underglow
+		zmk,underglow = &led_strip;
+		 */
+	};
+
+	transform: transform {
+		compatible = "zmk,matrix-transform";
+		rows = <4>;
+		columns = <10>;
+
+		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(3,3)  RC(3,4)     RC(3,5) RC(3,6)
+		>;
+	};
+
+	kscan: kscan {
+		compatible = "zmk,kscan-composite";
+		label = "KSCAN";
+		rows = <4>;
+		columns = <10>;
+
+		left {
+			kscan = <&kscan_left>;
+		};
+
+		right {
+			kscan = <&kscan_right>;
+			column-offset = <5>;
+		};
+	};
+
+	kscan_left: kscan_left {
+		compatible = "zmk,kscan-gpio-matrix";
+		label = "KSCAN_LEFT";
+
+		diode-direction = "col2row";
+
+		col-gpios
+		= <&gpiob 8 (GPIO_ACTIVE_HIGH)>
+		, <&gpiob 4 (GPIO_ACTIVE_HIGH)>
+		, <&gpiob 3 (GPIO_ACTIVE_HIGH)>
+		, <&gpioa 15 (GPIO_ACTIVE_HIGH)>
+		, <&gpioa 14 (GPIO_ACTIVE_HIGH)>
+		;
+		row-gpios
+		= <&gpiob 7  (GPIO_ACTIVE_HIGH | GPIO_PULL_DOWN)>
+		, <&gpiob 6  (GPIO_ACTIVE_HIGH | GPIO_PULL_DOWN)>
+		, <&gpiob 5 (GPIO_ACTIVE_HIGH | GPIO_PULL_DOWN)>
+		, <&gpioa 2 (GPIO_ACTIVE_HIGH | GPIO_PULL_DOWN)>
+		;
+	};
+
+	kscan_right: kscan_right {
+		compatible = "zmk,kscan-gpio-matrix";
+		label = "KSCAN_RIGHT";
+
+		diode-direction = "row2col";
+
+		col-gpios
+		= <&right_io 0 (GPIO_ACTIVE_LOW | GPIO_PULL_UP)>
+		, <&right_io 1 (GPIO_ACTIVE_LOW | GPIO_PULL_UP)>
+		, <&right_io 2 (GPIO_ACTIVE_LOW | GPIO_PULL_UP)>
+		, <&right_io 3 (GPIO_ACTIVE_LOW | GPIO_PULL_UP)>
+		, <&right_io 4 (GPIO_ACTIVE_LOW | GPIO_PULL_UP)>
+		;
+		row-gpios
+		= <&right_io 8  (GPIO_ACTIVE_LOW)>
+		, <&right_io 9  (GPIO_ACTIVE_LOW)>
+		, <&right_io 10 (GPIO_ACTIVE_LOW)>
+		, <&right_io 11 (GPIO_ACTIVE_LOW)>
+		;
+	};
+};
+
+&i2c2 {
+	pinctrl-0 = <&i2c2_scl_pb10 &i2c2_sda_pb11>;
+	status = "okay";
+	clock-frequency = <I2C_BITRATE_FAST>;
+
+	right_io: mcp23017@20 {
+		compatible = "microchip,mcp23017";
+		status = "okay";
+		gpio-controller;
+		reg = <0x20>;
+		label = "RIGHT_IO";
+		#gpio-cells = <2>;
+		ngpios = <16>;
+	};
+};
+
+&usb {
+	status = "okay";
+};
+
+&rtc {
+	status = "okay";
+};
+
+&flash0 {
+	/*
+	 * For more information, see:
+	 * http: //docs.zephyrproject.org/latest/guides/dts/index.html#flash-partitions
+	 */
+	partitions {
+		compatible = "fixed-partitions";
+		#address-cells = <1>;
+		#size-cells = <1>;
+
+		/* Set 6Kb of storage at the end of the 128Kb of flash */
+		storage_partition: partition@3e800 {
+			label = "storage";
+			reg = <0x0001e800 0x00001800>;
+		};
+	};
+};
diff --git a/app/boards/arm/ferris/ferris_rev02.keymap b/app/boards/arm/ferris/ferris_rev02.keymap
new file mode 100644
index 0000000..18fad42
--- /dev/null
+++ b/app/boards/arm/ferris/ferris_rev02.keymap
@@ -0,0 +1,79 @@
+/*
+ * Copyright (c) 2020 The ZMK Contributors
+ *
+ * SPDX-License-Identifier: MIT
+ */
+
+#include <behaviors.dtsi>
+#include <dt-bindings/zmk/keys.h>
+#include <dt-bindings/zmk/bt.h>
+
+#define NAV_L 1
+#define OTHER_L 2
+#define NUM_L 3
+#define SYM_L 4
+
+// 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 = <200>;
+            flavor = "tap-preferred";
+            bindings = <&kp>, <&kp>;
+        };
+    };
+
+    keymap {
+        compatible = "zmk,keymap";
+
+        default_layer {
+            bindings = <
+                &kp Q      &kp W      &kp E       &kp R          &kp T         &kp Y            &kp U          &kp I       &kp O      &kp P
+                &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
+                &kp Z      &kp X      &kp C       &kp V          &kp B         &kp N            &kp M          &kp COMMA   &kp DOT    &kp FSLH
+                                                  &lt NAV_L TAB  &kp ENTER     &lt NUM_L SPACE  &lt SYM_L BKSP
+            >;
+        };
+
+        nav_layer {
+            bindings = <
+                &trans     &trans     &trans      &trans          &trans       &trans           &trans         &trans      &trans     &trans
+                &trans     &trans     &trans      &trans          &trans       &trans           &kp LARW       &kp DARW    &kp UARW   &kp RARW
+                &trans     &trans     &trans      &trans          &trans       &trans           &kp HOME       &kp PG_DN   &kp PG_UP  &kp END
+                                                  &trans          &trans       &kp ESC          &kp DEL
+            >;
+        };
+
+        other_layer {
+            bindings = <
+                &trans     &trans     &trans      &trans          &trans       &trans           &trans         &trans      &trans     &trans
+                &trans     &trans     &trans      &trans          &trans       &trans           &trans         &trans      &trans     &trans
+                &trans     &trans     &trans      &trans          &trans       &trans           &kp HOME       &trans      &trans     &trans
+                                                  &trans          &trans       &trans           &trans
+            >;
+        };
+
+        num_layer {
+            bindings = <
+                &kp LBKT   &kp N7     &kp N8      &kp N9          &kp RBKT      &trans          &trans         &trans      &trans     &trans
+                &kp SEMI   &kp N4     &kp N5      &kp N6          &kp EQUAL     &trans          &trans         &trans      &trans     &trans
+                &kp GRAVE  &kp N1     &kp N2      &kp N3          &kp BSLH      &trans          &trans         &trans      &trans     &trans
+                                                  &kp N0          &kp MINUS     &trans          &trans
+            >;
+        };
+
+        sym_layer {
+            bindings = <
+                &kp LBRC     &kp LS(N7)  &kp LS(N8)  &kp LS(N9) &kp RBRC       &trans &trans   &trans    &trans    &trans
+                &kp COLON     &kp LS(N4)  &kp LS(N5)  &kp LS(N6) &kp PLUS       &trans &trans   &trans    &trans    &trans
+                &kp TILDE     &kp LS(N1)  &kp LS(N2)  &kp LS(N3) &kp LS(BSLH)       &trans &trans   &trans    &trans    &trans
+                                                   &kp LS(N0) &kp UNDER   &trans &trans
+            >;
+        };
+    };
+};
diff --git a/app/boards/arm/ferris/ferris_rev02.yaml b/app/boards/arm/ferris/ferris_rev02.yaml
new file mode 100644
index 0000000..f4cbdca
--- /dev/null
+++ b/app/boards/arm/ferris/ferris_rev02.yaml
@@ -0,0 +1,12 @@
+identifier: ferris_rev02
+name: Ferris 0.2
+type: mcu
+arch: arm
+toolchain:
+  - zephyr
+  - gnuarmemb
+  - xtools
+ram: 40
+supported:
+  - switches
+  - underglow
diff --git a/app/boards/arm/ferris/ferris_rev02.zmk.yml b/app/boards/arm/ferris/ferris_rev02.zmk.yml
new file mode 100644
index 0000000..da3a7f5
--- /dev/null
+++ b/app/boards/arm/ferris/ferris_rev02.zmk.yml
@@ -0,0 +1,10 @@
+file_format: "1"
+id: ferris_rev02
+name: Ferris 0.2
+type: board
+arch: arm
+features:
+  - keys
+outputs:
+  - usb
+url: https://github.com/pierrechevalier83/ferris/tree/main/0.2
diff --git a/app/boards/arm/ferris/ferris_rev02_defconfig b/app/boards/arm/ferris/ferris_rev02_defconfig
new file mode 100644
index 0000000..99c0b32
--- /dev/null
+++ b/app/boards/arm/ferris/ferris_rev02_defconfig
@@ -0,0 +1,43 @@
+# SPDX-License-Identifier: MIT
+
+CONFIG_BOARD_FERRIS=y
+CONFIG_SOC_SERIES_STM32F0X=y
+CONFIG_SOC_STM32F072XB=y
+# 48MHz system clock
+CONFIG_SYS_CLOCK_HW_CYCLES_PER_SEC=48000000
+
+# enable PINMUX
+CONFIG_PINMUX=y
+
+# enable GPIO
+CONFIG_GPIO=y
+
+# Enable i2c
+CONFIG_I2C=y
+
+# ZMK Settings
+CONFIG_ZMK_USB=y
+CONFIG_ZMK_KSCAN_GPIO_DRIVER=y
+CONFIG_ZMK_KSCAN_COMPOSITE_DRIVER=y
+CONFIG_ZMK_KSCAN_MATRIX_POLLING=y
+CONFIG_USB_SELF_POWERED=n
+
+# Enable IO multiplexer
+CONFIG_GPIO_MCP23017=y
+
+# Needed to reduce this to size that will fit on F072
+CONFIG_HEAP_MEM_POOL_SIZE=1024
+
+# clock configuration
+CONFIG_CLOCK_CONTROL=y
+
+# Clock configuration for Cube Clock control driver
+CONFIG_CLOCK_STM32_SYSCLK_SRC_PLL=y
+# use HSI as PLL input
+CONFIG_CLOCK_STM32_PLL_SRC_HSI=y
+# produce 48MHz clock at PLL output
+# CONFIG_CLOCK_STM32_PLL_PREDIV=1
+CONFIG_CLOCK_STM32_PLL_MULTIPLIER=6
+CONFIG_CLOCK_STM32_AHB_PRESCALER=1
+CONFIG_CLOCK_STM32_APB1_PRESCALER=1
+# CONFIG_CLOCK_STM32_APB2_PRESCALER=1