numpad layout

keyboards/numpad/keyboard.json

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+{
+  "manufacturer": "rp2040-zero",
+  "keyboard_name": "numpad",
+  "maintainer": "Sam Hadow",
+  "bootloader": "rp2040",
+  "diode_direction": "COL2ROW",
+  "features": {
+    "bootmagic": true,
+    "command": false,
+    "console": false,
+    "extrakey": true,
+    "mousekey": true,
+    "nkro": true
+  },
+  "matrix_pins": {
+    "rows": ["GP0", "GP1", "GP2", "GP3", "GP4", "GP5"],
+    "cols": ["GP6", "GP7", "GP8", "GP9"]
+  },
+  "processor": "RP2040",
+  "layouts": {
+    "LAYOUT": {
+      "layout": [
+        { "matrix": [0,0], "x": 0, "y": 0 },
+        { "matrix": [0,1], "x": 1, "y": 0 },
+        { "matrix": [0,2], "x": 2, "y": 0 },
+        { "matrix": [0,3], "x": 3, "y": 0 },
+
+        { "matrix": [1,0], "x": 0, "y": 1 },
+        { "matrix": [1,1], "x": 1, "y": 1 },
+        { "matrix": [1,2], "x": 2, "y": 1 },
+        { "matrix": [1,3], "x": 3, "y": 1 },
+
+        { "matrix": [2,0], "x": 0, "y": 2 },
+        { "matrix": [2,1], "x": 1, "y": 2 },
+        { "matrix": [2,2], "x": 2, "y": 2 },
+        { "matrix": [2,3], "x": 3, "y": 2 },
+
+        { "matrix": [3,0], "x": 0, "y": 3 },
+        { "matrix": [3,1], "x": 1, "y": 3 },
+        { "matrix": [3,2], "x": 2, "y": 3 },
+        { "matrix": [3,3], "x": 3, "y": 3 },
+
+        { "matrix": [4,0], "x": 0, "y": 4 },
+        { "matrix": [4,1], "x": 1, "y": 4 },
+        { "matrix": [4,2], "x": 2, "y": 4 },
+        { "matrix": [4,3], "x": 3, "y": 4 },
+
+        { "matrix": [5,0], "x": 0, "y": 5 },
+        { "matrix": [5,1], "x": 1, "y": 5 },
+        { "matrix": [5,2], "x": 2, "y": 5 },
+        { "matrix": [5,3], "x": 3, "y": 5 }
+      ]
+    }
+  },
+  "url": "",
+  "usb": {
+    "device_version": "1.0.0",
+    "pid": "0x0000",
+    "vid": "0xFEED"
+  }
+}

keyboards/numpad/keymaps/numpad/keymap.c

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+#include QMK_KEYBOARD_H
+
+const uint16_t PROGMEM keymaps[][MATRIX_ROWS][MATRIX_COLS] = {
+    /*
+     *
+     * ┌───┬───┬───┬───┐
+     * │ESC│F1 │F2 │F3 │
+     * ├───┼───┼───┼───┤
+     * │NUM│ / │ * │ - │
+     * ├───┼───┼───┼───┤
+     * │ 7 │ 8 │ 9 │   │
+     * ├───┼───┼───┤ENT│
+     * │ 4 │ 5 │ 6 │   │
+     * ├───┼───┼───┼───┤
+     * │ 1 │ 2 │ 3 │   │
+     * ├───┴───┼───┤ + │
+     * │   0   │ . │   │
+     * └───────┴───┴───┘
+     */
+    [0] = LAYOUT(
+        KC_ESC,    KC_F1,    KC_F2,    KC_F3,
+        KC_NUM_LOCK,   KC_PSLS,  KC_PAST,  KC_PMNS,
+        KC_P7,     KC_P8,    KC_P9,    KC_PPLS,
+        // row 3  (only cols 0–2 used)
+        KC_P4,     KC_P5,    KC_P6,    KC_NO,
+        KC_P1,     KC_P2,    KC_P3,    KC_PENT,
+        // row 5  (only cols 0 & 2 used)
+        KC_P0,     KC_NO,    KC_PDOT,  KC_NO
+    )
+};

keyboards/numpad/readme.md

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+# numpad
+
+6 rows, 4 columns numpad
+
+* Keyboard Maintainer: [Sam Hadow](https://git.hadow.fr/sam.hadow)
+* Hardware Supported: rp2040 zero