[Keyboard] Add Cornifi keyboard (#25753)

keyboards/cornifi/config.h

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+// Copyright 2024-2025 QMK
+// SPDX-License-Identifier: GPL-3.0-or-later
+
+#pragma once
+
+#define SERIAL_USART_FULL_DUPLEX
+#define SERIAL_USART_TX_PIN GP12
+#define SERIAL_USART_RX_PIN GP13
+#define USB_VBUS_PIN GP24
+
+/* RP2040- and hardware-specific config */
+#define RP2040_BOOTLOADER_DOUBLE_TAP_RESET
+#define RP2040_BOOTLOADER_DOUBLE_TAP_RESET_TIMEOUT 500U
+#define PICO_XOSC_STARTUP_DELAY_MULTIPLIER 64

keyboards/cornifi/keyboard.json

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+{
+    "manufacturer": "v3lmx",
+    "keyboard_name": "cornifi",
+    "maintainer": "v3lmx",
+    "bootloader": "rp2040",
+    "diode_direction": "COL2ROW",
+    "features": {
+        "bootmagic": true,
+        "extrakey": true,
+        "mousekey": true,
+        "nkro": true
+    },
+    "matrix_pins": {
+        "direct": [
+            ["GP21", "GP25", "GP26", "GP28", "GP29", "GP5"],
+            ["GP20", "GP22", "GP27", "GP2", "GP3", "GP8"],
+            ["GP19", "GP23", "GP1", "GP0", "GP4", null],
+            [null, null, "GP16", "GP17", "GP18", null]
+        ]
+    },
+    "processor": "RP2040",
+    "split": {
+        "bootmagic": {
+            "matrix": [4, 0]
+        },
+        "enabled": true,
+        "matrix_pins": {
+            "right": {
+                "direct": [
+                    ["GP9", "GP8", "GP4", "GP3", "GP2", "GP25"],
+                    ["GP10", "GP6", "GP1", "GP28", "GP27", "GP21"],
+                    ["GP11", "GP5", "GP0", "GP29", "GP26", null],
+                    [null, null, "GP16", "GP17", "GP18", null]
+                ]
+            }
+        },
+        "serial": {
+            "driver": "vendor"
+        }
+    },
+    "url": "https://github.com/v3lmx/cornifi",
+    "usb": {
+        "device_version": "1.0.0",
+        "pid": "0x0000",
+        "vid": "0xFEED"
+    },
+    "layout_aliases": {
+        "LAYOUT": "LAYOUT_split_3x5_3_ex2"
+    },
+    "layouts": {
+        "LAYOUT_split_3x5_3_ex2": {
+            "layout": [
+                {"matrix": [0, 0], "x": 0, "y": 0.9},
+                {"matrix": [0, 1], "x": 1, "y": 0.3},
+                {"matrix": [0, 2], "x": 2, "y": 0},
+                {"matrix": [0, 3], "x": 3, "y": 0.35},
+                {"matrix": [0, 4], "x": 4, "y": 0.45},
+                {"matrix": [0, 5], "x": 5, "y": 0.7},
+                {"matrix": [4, 5], "x": 8, "y": 0.7},
+                {"matrix": [4, 4], "x": 9, "y": 0.45},
+                {"matrix": [4, 3], "x": 10, "y": 0.35},
+                {"matrix": [4, 2], "x": 11, "y": 0},
+                {"matrix": [4, 1], "x": 12, "y": 0.3},
+                {"matrix": [4, 0], "x": 13, "y": 0.9},
+                {"matrix": [1, 0], "x": 0, "y": 1.9},
+                {"matrix": [1, 1], "x": 1, "y": 1.3},
+                {"matrix": [1, 2], "x": 2, "y": 1},
+                {"matrix": [1, 3], "x": 3, "y": 1.35},
+                {"matrix": [1, 4], "x": 4, "y": 1.45},
+                {"matrix": [1, 5], "x": 5, "y": 1.7},
+                {"matrix": [5, 5], "x": 8, "y": 1.7},
+                {"matrix": [5, 4], "x": 9, "y": 1.45},
+                {"matrix": [5, 3], "x": 10, "y": 1.35},
+                {"matrix": [5, 2], "x": 11, "y": 1},
+                {"matrix": [5, 1], "x": 12, "y": 1.3},
+                {"matrix": [5, 0], "x": 13, "y": 1.9},
+                {"matrix": [2, 0], "x": 0, "y": 2.9},
+                {"matrix": [2, 1], "x": 1, "y": 2.3},
+                {"matrix": [2, 2], "x": 2, "y": 2},
+                {"matrix": [2, 3], "x": 3, "y": 2.35},
+                {"matrix": [2, 4], "x": 4, "y": 2.45},
+                {"matrix": [6, 4], "x": 9, "y": 2.45},
+                {"matrix": [6, 3], "x": 10, "y": 2.35},
+                {"matrix": [6, 2], "x": 11, "y": 2},
+                {"matrix": [6, 1], "x": 12, "y": 2.3},
+                {"matrix": [6, 0], "x": 13, "y": 2.9},
+                {"matrix": [3, 2], "x": 3, "y": 3.7},
+                {"matrix": [3, 3], "x": 4, "y": 3.7},
+                {"matrix": [3, 4], "x": 5, "y": 3.2, "h": 1.5},
+                {"matrix": [7, 4], "x": 8, "y": 3.2, "h": 1.5},
+                {"matrix": [7, 3], "x": 9, "y": 3.7},
+                {"matrix": [7, 2], "x": 10, "y": 3.7}
+            ]
+        }
+    }
+}

keyboards/cornifi/keymaps/default/keymap.c

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+// Copyright 2025 @v3lmx
+// SPDX-License-Identifier: GPL-3.0-or-later
+
+#include QMK_KEYBOARD_H
+
+const uint16_t PROGMEM keymaps[][MATRIX_ROWS][MATRIX_COLS] = {
+    // clang-format off
+    [0] = LAYOUT_split_3x5_3_ex2(
+        KC_Q,   KC_W,   KC_E,   KC_R,   KC_T,   KC_LBRC,        KC_RBRC,    KC_Y,   KC_U,   KC_I,   KC_O,   KC_P,
+        KC_A,   KC_S,   KC_D,   KC_F,   KC_G,   XXXXXXX,        XXXXXXX,    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_SLSH,
+                                KC_ESC, MO(1),  KC_TAB,         KC_ENT,     MO(2),  KC_BSPC
+    ),
+    [1] = LAYOUT_split_3x5_3_ex2(
+        KC_1,   KC_2,   KC_3,   KC_4,   KC_5,   _______,        _______,    KC_6,   KC_7,   KC_8,   KC_9,   KC_0,
+        XXXXXXX,XXXXXXX,XXXXXXX,XXXXXXX,XXXXXXX,_______,        _______,    KC_LEFT,KC_DOWN,KC_UP,  KC_RIGHT,XXXXXXX,
+        XXXXXXX,XXXXXXX,XXXXXXX,XXXXXXX,XXXXXXX,                            XXXXXXX,XXXXXXX,XXXXXXX,XXXXXXX,XXXXXXX,
+                                KC_LGUI,_______,KC_SPC,         KC_ENT,     XXXXXXX,  KC_RALT
+  ),
+    [2] = LAYOUT_split_3x5_3_ex2(
+        KC_EXLM, KC_AT,KC_HASH, KC_DLR, KC_PERC,_______,        _______,    KC_CIRC,KC_AMPR,KC_ASTR,KC_LPRN,KC_RPRN,
+        XXXXXXX,XXXXXXX,XXXXXXX,XXXXXXX,XXXXXXX,_______,        _______,    KC_MINS,KC_EQL, KC_LBRC,KC_RBRC,KC_BSLS,
+        XXXXXXX,XXXXXXX,XXXXXXX,XXXXXXX,XXXXXXX,                            KC_UNDS,KC_PLUS,KC_LCBR,KC_RCBR,KC_PIPE,
+                                KC_LGUI,XXXXXXX,  KC_SPC,         KC_ENT,     _______,KC_RALT
+  )
+    // clang-format on
+};

keyboards/cornifi/readme.md

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+# cornifi
+
+![cornifi keyboard](https://i.imgur.com/Q7B3VX8.jpeg)
+
+The cornifi keyboard is a split keyboard based on the [corne](https://github.com/foostan/crkbd) with the physical layout of the [fifi](https://github.com/raychengy/fifi_split_keeb).
+
+* Keyboard Maintainer: [v3lmx (github)](https://github.com/v3lmx)
+* Hardware Availability: [v3lmx/cornifi (github)](https://github.com/v3lmx/cornifi)
+
+Make example for this keyboard (after setting up your build environment):
+
+    make cornifi:default
+
+Flashing example for this keyboard:
+
+    make cornifi: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 3 ways:
+
+* **Bootmagic reset**: Hold down the key at (0,0) in the matrix (usually the top left key or Escape) and plug in the keyboard
+* **Physical reset button**: Hold down the `boot` button and press the `reset` button
+* **Keycode in layout**: Press the key mapped to `TD_BOOT` twice if it is available
+
+## Keymap
+
+It is recommended to make your own keymap using the [external userspace feature(https://docs.qmk.fm/newbs_external_userspace).
+
+You can find an example here: [v3lmx qmk userspace](https://github.com/v3lmx/qmk_userspace)