Add Snappy Pad v.1 (#25419)

keyboards/snappypad/v1_3x4/config.h

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+// Copyright 2025 Snappy Key <snappykey@gmail.com>
+// SPDX-License-Identifier: GPL-2.0-or-later
+#pragma once
+
+#define MATRIX_MASKED

keyboards/snappypad/v1_3x4/keyboard.json

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+{
+    "manufacturer": "Snappy Key",
+    "keyboard_name": "Snappy Pad v1",
+    "maintainer": "snappykey",
+    "development_board": "promicro",
+    "diode_direction": "COL2ROW",
+    "encoder": {
+        "rotary": [
+            {"pin_a": "F4", "pin_b": "F5"}
+        ]
+    },
+    "features": {
+        "bootmagic": true,
+        "extrakey": true,
+        "mousekey": true,
+        "encoder": true
+    },
+    "matrix_pins": {
+        "cols": ["E6", "B4", "D7", "C6", "B6", "F6"],
+        "rows": ["D4", "D0", "D1"]
+    },
+    "url": "snappykey.eu",
+    "usb": {
+        "device_version": "1.0.0",
+        "pid": "0x1451",
+        "vid": "0x16D0"
+    },
+    "layouts": {
+        "LAYOUT": {
+            "layout": [
+                {"matrix": [0, 4], "x": 0, "y": 0},
+                {"matrix": [0, 5], "x": 3, "y": 0},
+                {"matrix": [0, 0], "x": 0, "y": 1},
+                {"matrix": [0, 1], "x": 1, "y": 1},
+                {"matrix": [0, 2], "x": 2, "y": 1},
+                {"matrix": [0, 3], "x": 3, "y": 1},
+                {"matrix": [1, 0], "x": 0, "y": 2},
+                {"matrix": [1, 1], "x": 1, "y": 2},
+                {"matrix": [1, 2], "x": 2, "y": 2},
+                {"matrix": [1, 3], "x": 3, "y": 2},
+                {"matrix": [2, 0], "x": 0, "y": 3},
+                {"matrix": [2, 1], "x": 1, "y": 3},
+                {"matrix": [2, 2], "x": 2, "y": 3},
+                {"matrix": [2, 3], "x": 3, "y": 3}
+            ]
+        }
+    }
+}

keyboards/snappypad/v1_3x4/keymaps/default/keymap.c

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+// Copyright 2025 Snappy Key <snappykey@gmail.com>
+// SPDX-License-Identifier: GPL-2.0-or-later
+#include QMK_KEYBOARD_H
+
+const uint16_t PROGMEM keymaps[][MATRIX_ROWS][MATRIX_COLS] = {
+    [0] = LAYOUT(
+        TO(1),                  KC_MPLY,
+        KC_F13, KC_F14, KC_F15, KC_F16,
+        KC_F17, KC_F18, KC_F19, KC_F20,
+        KC_F21, KC_F22, KC_F23, KC_F24
+    ),
+    [1] = LAYOUT(
+        TO(2),                                    KC_TRNS,
+        LSFT(KC_F13), LSFT(KC_F14), LSFT(KC_F15), LSFT(KC_F16),
+        LSFT(KC_F17), LSFT(KC_F18), LSFT(KC_F19), LSFT(KC_F20),
+        LSFT(KC_F21), LSFT(KC_F22), LSFT(KC_F23), LSFT(KC_F24)
+    ),
+    [2] = LAYOUT(
+        TO(3),                                    KC_TRNS,
+        LCTL(KC_F13), LCTL(KC_F14), LCTL(KC_F15), LCTL(KC_F16),
+        LCTL(KC_F17), LCTL(KC_F18), LCTL(KC_F19), LCTL(KC_F20),
+        LCTL(KC_F21), LCTL(KC_F22), LCTL(KC_F23), LCTL(KC_F24)
+    ),
+    [3] = LAYOUT(
+        TO(0),                                    KC_TRNS,
+        LALT(KC_F13), LALT(KC_F14), LALT(KC_F15), LALT(KC_F16),
+        LALT(KC_F17), LALT(KC_F18), LALT(KC_F19), LALT(KC_F20),
+        LALT(KC_F21), LALT(KC_F22), LALT(KC_F23), LALT(KC_F24)
+    )
+};
+
+layer_state_t layer_state_set_user(layer_state_t state) {
+    switch (get_highest_layer(state)) {
+        case 0:
+            gpio_write_pin_low(F7);
+            gpio_write_pin_low(B2);
+            gpio_write_pin_low(B5);
+            break;
+        case 1:
+            gpio_write_pin_high(F7);
+            gpio_write_pin_low(B2);
+            gpio_write_pin_low(B5);
+            break;
+        case 2:
+            gpio_write_pin_high(F7);
+            gpio_write_pin_high(B2);
+            gpio_write_pin_low(B5);
+            break;
+        case 3:
+            gpio_write_pin_high(F7);
+            gpio_write_pin_high(B2);
+            gpio_write_pin_high(B5);
+            break;
+    }
+    return state;
+}
+
+#if defined(ENCODER_MAP_ENABLE)
+const uint16_t PROGMEM encoder_map[][NUM_ENCODERS][NUM_DIRECTIONS] = {
+    [0] = { ENCODER_CCW_CW(KC_VOLD, KC_VOLU) },
+    [1] = { ENCODER_CCW_CW(_______, _______) },
+    [2] = { ENCODER_CCW_CW(_______, _______) },
+    [3] = { ENCODER_CCW_CW(_______, _______) }
+};
+#endif

keyboards/snappypad/v1_3x4/readme.md

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+# Snappy Pad v.1
+
+![sp](https://i.imgur.com/Xgv5qky.jpeg)
+
+Reliable macro pad for all use cases
+
+* Keyboard Maintainer: [SnappyKey](https://github.com/snappykey)
+* Hardware Supported: pcb, cad files
+* Hardware Availability: Will be open sourced later
+
+Make example for this keyboard (after setting up your build environment):
+
+    make snappypad/v1_3x4:default
+
+Flashing example for this keyboard:
+
+    make snappypad/v1_3x4: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**: Briefly press the button on the back of the PCB - some may have pads you must short instead
+* **Keycode in layout**: Press the key mapped to `QK_BOOT` if it is available

keyboards/snappypad/v1_3x4/v1_3x4.c

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+// Copyright 2025 Snappy Key <snappykey@gmail.com>
+// SPDX-License-Identifier: GPL-2.0-or-later
+#include "quantum.h"
+
+void keyboard_post_init_kb(void) {
+    gpio_set_pin_output(F7);
+    gpio_set_pin_output(B2);
+    gpio_set_pin_output(B5);
+
+    keyboard_post_init_user();
+}