Support for Alatus PCB (#26116)

keyboards/alatus/config.h

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+// Copyright 2026 Dominic Yeap-Holliday <DoomishGuy>
+// SPDX-License-Identifier: GPL-2.0-or-later
+
+#pragma once
+
+// Trackpoint
+#define PS2_PIO_USE_PIO1

keyboards/alatus/keyboard.json

@@ -0,0 +1,170 @@
+{
+    "manufacturer": "NA",
+    "keyboard_name": "Alatus",
+    "maintainer": "DoomishGuy",
+    "bootmagic": {
+        "matrix": [0, 4]
+    },
+    "development_board": "promicro_rp2040",
+    "diode_direction": "COL2ROW",
+    "encoder": {
+        "rotary": [
+            {"pin_a": "GP22", "pin_b": "GP26"}
+        ]
+    },
+    "features": {
+        "bootmagic": true,
+        "encoder": true,
+        "extrakey": true,
+        "mousekey": true,
+        "nkro": true,
+        "rgb_matrix": true
+    },
+    "matrix_pins": {
+        "cols": ["GP8", "GP9", "GP21", "GP23", "GP20"],
+        "rows": ["GP4", "GP5", "GP6", "GP7"]
+    },
+    "ps2": {
+        "clock_pin": "GP28",
+        "data_pin": "GP27",
+        "driver": "vendor",
+        "enabled": true,
+        "mouse_enabled": true
+    },
+    "rgb_matrix": {
+        "driver": "ws2812",
+        "layout": [
+            {"x": 90, "y": 33, "flags": 8},
+            {"x": 90, "y": 49, "flags": 8},
+            {"matrix": [3, 4], "x": 85, "y": 51, "flags": 4},
+            {"matrix": [3, 3], "x": 64, "y": 46, "flags": 4},
+            {"matrix": [3, 2], "x": 44, "y": 43, "flags": 4},
+            {"matrix": [3, 1], "x": 26, "y": 43, "flags": 4},
+            {"matrix": [2, 4], "x": 72, "y": 31, "flags": 4},
+            {"matrix": [2, 3], "x": 54, "y": 29, "flags": 4},
+            {"matrix": [2, 2], "x": 36, "y": 24, "flags": 4},
+            {"matrix": [2, 1], "x": 18, "y": 28, "flags": 4},
+            {"matrix": [2, 0], "x": 0, "y": 36, "flags": 4},
+            {"matrix": [1, 4], "x": 72, "y": 19, "flags": 4},
+            {"matrix": [1, 3], "x": 54, "y": 17, "flags": 4},
+            {"matrix": [1, 2], "x": 36, "y": 12, "flags": 4},
+            {"matrix": [1, 1], "x": 18, "y": 16, "flags": 4},
+            {"matrix": [1, 0], "x": 0, "y": 24, "flags": 4},
+            {"matrix": [0, 4], "x": 72, "y": 7, "flags": 4},
+            {"matrix": [0, 3], "x": 54, "y": 5, "flags": 4},
+            {"matrix": [0, 2], "x": 36, "y": 0, "flags": 4},
+            {"matrix": [0, 1], "x": 18, "y": 4, "flags": 4},
+            {"matrix": [0, 0], "x": 0, "y": 12, "flags": 4},
+            {"x": 0, "y": 9, "flags": 2},
+            {"x": 45, "y": 0, "flags": 2},
+            {"x": 80, "y": 11, "flags": 2},
+            {"x": 75, "y": 48, "flags": 2},
+            {"x": 54, "y": 44, "flags": 2},
+            {"x": 17, "y": 45, "flags": 2},
+            {"x": 134, "y": 33, "flags": 8},
+            {"x": 134, "y": 49, "flags": 8},
+            {"matrix": [7, 4], "x": 139, "y": 51, "flags": 4},
+            {"matrix": [7, 3], "x": 160, "y": 46, "flags": 4},
+            {"matrix": [7, 2], "x": 180, "y": 43, "flags": 4},
+            {"matrix": [7, 1], "x": 198, "y": 43, "flags": 4},
+            {"matrix": [6, 4], "x": 152, "y": 31, "flags": 4},
+            {"matrix": [6, 3], "x": 170, "y": 29, "flags": 4},
+            {"matrix": [6, 2], "x": 188, "y": 24, "flags": 4},
+            {"matrix": [6, 1], "x": 206, "y": 28, "flags": 4},
+            {"matrix": [6, 0], "x": 224, "y": 36, "flags": 4},
+            {"matrix": [5, 4], "x": 152, "y": 19, "flags": 4},
+            {"matrix": [5, 3], "x": 170, "y": 17, "flags": 4},
+            {"matrix": [5, 2], "x": 188, "y": 12, "flags": 4},
+            {"matrix": [5, 1], "x": 206, "y": 16, "flags": 4},
+            {"matrix": [5, 0], "x": 224, "y": 24, "flags": 4},
+            {"matrix": [4, 4], "x": 152, "y": 7, "flags": 4},
+            {"matrix": [4, 3], "x": 170, "y": 5, "flags": 4},
+            {"matrix": [4, 2], "x": 188, "y": 0, "flags": 4},
+            {"matrix": [4, 1], "x": 206, "y": 4, "flags": 4},
+            {"matrix": [4, 0], "x": 224, "y": 12, "flags": 4},
+            {"x": 224, "y": 9, "flags": 2},
+            {"x": 179, "y": 0, "flags": 2},
+            {"x": 144, "y": 11, "flags": 2},
+            {"x": 149, "y": 48, "flags": 2},
+            {"x": 170, "y": 44, "flags": 2},
+            {"x": 207, "y": 45, "flags": 2}
+        ],
+        "max_brightness": 128,
+        "split_count": [27, 27]
+    },
+    "split": {
+        "bootmagic": {
+            "matrix": [4, 4]
+        },
+        "enabled": true,
+        "encoder": {
+            "right": {
+                "rotary": [
+                    {"pin_a": "GP26", "pin_b": "GP22"}
+                ]
+            }
+        },
+        "handedness": {
+            "pin": "GP29"
+        },
+        "serial": {
+            "driver": "vendor",
+            "pin": "GP1"
+        }
+    },
+    "tags": ["columnar", "split", "encoder", "choc v1", "choc spaced", "RP2040"],
+    "url": "https://codeberg.org/DoomishGuy/alatus",
+    "usb": {
+        "device_version": "1.0.0",
+        "pid": "0x0000",
+        "vid": "0xFEED"
+    },
+    "ws2812": {
+        "driver": "vendor",
+        "pin": "GP0"
+    },
+    "layouts": {
+        "LAYOUT": {
+            "layout": [
+                {"label": "L04", "matrix": [0, 0], "x": 0, "y": 1.1},
+                {"label": "L03", "matrix": [0, 1], "x": 1, "y": 0.35},
+                {"label": "L02", "matrix": [0, 2], "x": 2, "y": 0},
+                {"label": "L01", "matrix": [0, 3], "x": 3, "y": 0.38},
+                {"label": "L00", "matrix": [0, 4], "x": 4, "y": 0.53},
+                {"label": "R00", "matrix": [4, 4], "x": 10, "y": 0.53},
+                {"label": "R01", "matrix": [4, 3], "x": 11, "y": 0.38},
+                {"label": "R02", "matrix": [4, 2], "x": 12, "y": 0},
+                {"label": "R03", "matrix": [4, 1], "x": 13, "y": 0.35},
+                {"label": "R04", "matrix": [4, 0], "x": 14, "y": 1.1},
+                {"label": "L09", "matrix": [1, 0], "x": 0, "y": 2.1},
+                {"label": "L08", "matrix": [1, 1], "x": 1, "y": 1.35},
+                {"label": "L07", "matrix": [1, 2], "x": 2, "y": 1},
+                {"label": "L06", "matrix": [1, 3], "x": 3, "y": 1.38},
+                {"label": "L05", "matrix": [1, 4], "x": 4, "y": 1.53},
+                {"label": "R05", "matrix": [5, 4], "x": 10, "y": 1.53},
+                {"label": "R06", "matrix": [5, 3], "x": 11, "y": 1.38},
+                {"label": "R07", "matrix": [5, 2], "x": 12, "y": 1},
+                {"label": "R08", "matrix": [5, 1], "x": 13, "y": 1.35},
+                {"label": "R09", "matrix": [5, 0], "x": 14, "y": 2.1},
+                {"label": "L14", "matrix": [2, 0], "x": 0, "y": 3.1},
+                {"label": "L13", "matrix": [2, 1], "x": 1, "y": 2.35},
+                {"label": "L12", "matrix": [2, 2], "x": 2, "y": 2},
+                {"label": "L11", "matrix": [2, 3], "x": 3, "y": 2.38},
+                {"label": "L10", "matrix": [2, 4], "x": 4, "y": 2.53},
+                {"label": "R10", "matrix": [6, 4], "x": 10, "y": 2.53},
+                {"label": "R11", "matrix": [6, 3], "x": 11, "y": 2.38},
+                {"label": "R12", "matrix": [6, 2], "x": 12, "y": 2},
+                {"label": "R13", "matrix": [6, 1], "x": 13, "y": 2.35},
+                {"label": "R14", "matrix": [6, 0], "x": 14, "y": 3.1},
+                {"label": "L18", "matrix": [3, 1], "x": 1, "y": 4},
+                {"label": "L17", "matrix": [3, 2], "x": 2, "y": 4},
+                {"label": "L16", "matrix": [3, 3], "x": 3, "y": 4.25},
+                {"label": "L15", "matrix": [3, 4], "x": 4, "y": 4.5},
+                {"label": "R15", "matrix": [7, 4], "x": 10, "y": 4.5},
+                {"label": "R16", "matrix": [7, 3], "x": 11, "y": 4.25},
+                {"label": "R17", "matrix": [7, 2], "x": 12, "y": 4},
+                {"label": "R18", "matrix": [7, 1], "x": 13, "y": 4}
+            ]
+        }
+    }
+}

keyboards/alatus/keymaps/default/keymap.c

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+// Copyright 2026 Dominic Yeap-Holliday <DoomishGuy>
+// SPDX-License-Identifier: GPL-2.0-or-later
+
+#include QMK_KEYBOARD_H
+
+enum layers {
+    _QWERTY,
+};
+
+// clang-format off
+const uint16_t PROGMEM keymaps[][MATRIX_ROWS][MATRIX_COLS] = {
+    [_QWERTY] = LAYOUT(
+        KC_Q, KC_W,    KC_E,    KC_R,     KC_T,        KC_Y,   KC_U,    KC_I,    KC_O,    KC_P,
+        KC_A, KC_S,    KC_D,    KC_F,     KC_G,        KC_H,   KC_J,    KC_K,    KC_L,    KC_SCLN,
+        KC_Z, KC_X,    KC_C,    KC_V,     KC_B,        KC_N,   KC_M,    KC_COMM, KC_DOT,  KC_SLASH,
+              KC_LCTL, KC_LGUI, KC_SPACE, KC_ENTER,    KC_TAB, KC_BSPC, KC_RSFT, KC_RALT
+        )
+};
+// clang-format on
+
+#if defined(ENCODER_MAP_ENABLE)
+const uint16_t PROGMEM encoder_map[][NUM_ENCODERS][NUM_DIRECTIONS] = {
+    [_QWERTY] = {ENCODER_CCW_CW(KC_L, KC_R), ENCODER_CCW_CW(KC_U, KC_D)},
+};
+#endif

keyboards/alatus/keymaps/default/readme.md

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+# Alatus's Default Keymap
+
+The default keymap is intentionally Spartan, and is not intended for long term use.
+The provided `rules.mk` enables encoder mapping to test encoder functionality.

keyboards/alatus/keymaps/default/rules.mk

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+ENCODER_MAP_ENABLE = yes

keyboards/alatus/readme.md

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+# alatus
+
+![alatus](https://i.imgur.com/kVrFpSJ.jpeg)
+
+A low profile 38 key split keyboard featuring rotary encoder and trackpoint support.
+
+* Keyboard Maintainer: [DoomishGuy](https://codeberg.org/DoomishGuy)
+* Hardware Supported: RP2040 Pro Micro and compatible
+* Hardware Availability: [DoomishGuy/alatus](https://codeberg.org/DoomishGuy/alatus)
+
+Make example for this keyboard (after setting up your build environment):
+
+    make alatus:default
+
+Flashing example for this keyboard:
+
+    make alatus:default:flash
+
+See the [build environment setup](https://docs.qmk.fm/#/getting_started_build_tools) and the [make instructions](https://docs.qmk.fm/#/getting_started_make_guide) for more information. Brand new to QMK? Start with our [Complete Newbs Guide](https://docs.qmk.fm/#/newbs).
+
+## Bootloader
+
+Enter the bootloader in 2 ways:
+
+* **Bootmagic reset**: Hold down the top left/right key (for the left/right splits respectively) and plug in the keyboard.
+* **Physical reset button**: Press the reset button below the microcontroller twice in quick succession.