Add initial support for the Makey Makey Classic (#16658)

keyboards/makeymakey/config.h

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+/* Copyright 2022 Jose Pablo Ramirez <jp.ramangulo@gmail.com>
+ *
+ * This program is free software: you can redistribute it and/or modify
+ * it under the terms of the GNU General Public License as published by
+ * the Free Software Foundation, either version 2 of the License, or
+ * (at your option) any later version.
+ *
+ * This program is distributed in the hope that it will be useful,
+ * but WITHOUT ANY WARRANTY; without even the implied warranty of
+ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+ * GNU General Public License for more details.
+ *
+ * You should have received a copy of the GNU General Public License
+ * along with this program.  If not, see <http://www.gnu.org/licenses/>.
+ */
+
+#pragma once
+
+#include "config_common.h"
+
+/* key matrix size */
+#define MATRIX_ROWS 3
+#define MATRIX_COLS 6
+
+/* Keyboard Matrix Assignments */
+#define DIRECT_PINS { \
+    { D6, B4, C7, B1, E6, D7 }, \
+    { C6, D4, D0, D1, D2, D2 }, \
+    { F0, F1, F5, F5, F6, F7 }  \
+}
+
+/* LEDs Pins */
+#define LED_PINS 5
+#define LED_PINS_HW {B5, B6, B7, B3, B2}
+
+#define DEBOUNCE 10

keyboards/makeymakey/info.json

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+{
+    "keyboard_name": "Makey Makey Classic",
+    "manufacturer": "JoyLabs",
+    "url": "https://makeymakey.com/products/makey-makey-kit",
+    "maintainer": "Jpe230",
+    "usb": {
+      "vid": "0xE230",
+      "pid": "0x2B74",
+      "device_version": "0.0.1"
+    },
+    "layouts": {
+      "LAYOUT": {
+        "layout": [
+          {"x":0, "y":0},
+          {"x":1, "y":0},
+          {"x":2, "y":0},
+          {"x":3, "y":0},
+          {"x":4, "y":0},
+          {"x":5, "y":0},
+          {"x":0, "y":1},
+          {"x":1, "y":1},
+          {"x":2, "y":1},
+          {"x":3, "y":1},
+          {"x":4, "y":1},
+          {"x":5, "y":1},
+          {"x":0, "y":2},
+          {"x":1, "y":2},
+          {"x":2, "y":2},
+          {"x":3, "y":2},
+          {"x":4, "y":2},
+          {"x":5, "y":2}
+        ]
+      }
+    }
+  }

keyboards/makeymakey/keymaps/default/keymap.c

@@ -0,0 +1,42 @@
+/* Copyright 2022 Jose Pablo Ramirez <jp.ramangulo@gmail.com>
+ *
+ * This program is free software: you can redistribute it and/or modify
+ * it under the terms of the GNU General Public License as published by
+ * the Free Software Foundation, either version 2 of the License, or
+ * (at your option) any later version.
+ *
+ * This program is distributed in the hope that it will be useful,
+ * but WITHOUT ANY WARRANTY; without even the implied warranty of
+ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+ * GNU General Public License for more details.
+ *
+ * You should have received a copy of the GNU General Public License
+ * along with this program.  If not, see <http://www.gnu.org/licenses/>.
+ */
+
+#include QMK_KEYBOARD_H
+
+// clang-format off
+/*
+ *     ,-----------------------------------------------------.
+ *     |                                                     |
+ *     |          (UP)                                       |
+ * MSU |           ^                   .-""-.      .-""-.    | W
+ * MSD |           |                  /      \    /      \   | A
+ * MSL | (LEFT)<== O ==> (RIGHT)     ;        ;  ;        ;  | S
+ * MSR |           |                  \      /    \      /   | D
+ * MB1 |           v                   '-..-'      '-..-'    | F
+ * MB2 |         (DOWN)               (SPACE)    (RGHT CLK)  | G
+ *     |                                                     |
+ *     \-----------------------------------------------------/
+ */
+
+const uint16_t PROGMEM keymaps[][MATRIX_ROWS][MATRIX_COLS] = {
+    [0] = LAYOUT(
+        KC_UP,   KC_DOWN, KC_LEFT, KC_RGHT, KC_SPC,  KC_BTN1,
+        KC_W,    KC_A,    KC_S,    KC_D,    KC_F,    KC_G,
+        KC_MS_U, KC_MS_D, KC_MS_L, KC_MS_R, KC_BTN1, KC_BTN2
+    )
+};
+
+// clang-format on

keyboards/makeymakey/makeymakey.c

@@ -0,0 +1,126 @@
+/* Copyright 2022 Jose Pablo Ramirez <jp.ramangulo@gmail.com>
+ *
+ * This program is free software: you can redistribute it and/or modify
+ * it under the terms of the GNU General Public License as published by
+ * the Free Software Foundation, either version 2 of the License, or
+ * (at your option) any later version.
+ *
+ * This program is distributed in the hope that it will be useful,
+ * but WITHOUT ANY WARRANTY; without even the implied warranty of
+ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+ * GNU General Public License for more details.
+ *
+ * You should have received a copy of the GNU General Public License
+ * along with this program.  If not, see <http://www.gnu.org/licenses/>.
+ */
+
+#include "makeymakey.h"
+
+static pin_t pins[MATRIX_ROWS][MATRIX_COLS] = DIRECT_PINS;
+static pin_t led_pins[LED_PINS] = LED_PINS_HW;
+static bool led_state[MATRIX_COLS] = {0};
+static uint8_t led_cycle_counter = 0;
+
+void keyboard_post_init_kb(void) {
+    for(uint8_t row = 0; row < MATRIX_ROWS; row++)
+    {
+        for(uint8_t col = 0; col < MATRIX_COLS; col++)
+        {
+            writePinLow(pins[row][col]); //Disable internal pull-up resistors
+        }
+    }
+
+    keyboard_post_init_user();
+}
+
+void cycle_leds(void) {
+    for(uint8_t i = 0; i < 3; i++) {
+        setPinInput(led_pins[i]);
+        writePinLow(led_pins[i]);
+    }
+
+    led_cycle_counter++;
+    led_cycle_counter %= 6;
+
+    switch (led_cycle_counter) {
+        case 0:
+            if (led_state[0]) { // Up Arrow
+                setPinInput(led_pins[0]);
+                writePinLow(led_pins[0]);
+                setPinOutput(led_pins[1]);
+                writePinHigh(led_pins[1]);
+                setPinOutput(led_pins[2]);
+                writePinLow(led_pins[2]);
+            }
+            break;
+        case 1:
+            if (led_state[1]) { // Down Arrow
+                setPinOutput(led_pins[0]);
+                writePinHigh(led_pins[0]);
+                setPinOutput(led_pins[1]);
+                writePinLow(led_pins[1]);
+                setPinInput(led_pins[2]);
+                writePinLow(led_pins[2]);
+            }
+            break;
+        case 2:
+            if (led_state[2]) { // Left Arrow
+                setPinOutput(led_pins[0]);
+                writePinLow(led_pins[0]);
+                setPinOutput(led_pins[1]);
+                writePinHigh(led_pins[1]);
+                setPinInput(led_pins[2]);
+                writePinLow(led_pins[2]);
+            }
+            break;
+        case 3:
+            if (led_state[3]) { // Right Arrow
+                setPinInput(led_pins[0]);
+                writePinLow(led_pins[0]);
+                setPinOutput(led_pins[1]);
+                writePinLow(led_pins[1]);
+                setPinOutput(led_pins[2]);
+                writePinHigh(led_pins[2]);
+            }
+            break;
+        case 4:
+            if (led_state[4]) { // Space
+                setPinOutput(led_pins[0]);
+                writePinLow(led_pins[0]);
+                setPinInput(led_pins[1]);
+                writePinLow(led_pins[1]);
+                setPinOutput(led_pins[2]);
+                writePinHigh(led_pins[2]);
+              }
+            break;
+         case 5:
+            if (led_state[5]) { // Right Click
+                setPinOutput(led_pins[0]);
+                writePinHigh(led_pins[0]);
+                setPinInput(led_pins[1]);
+                writePinLow(led_pins[1]);
+                setPinOutput(led_pins[2]);
+                writePinLow(led_pins[2]);
+            }
+            break;
+        default:
+            break;
+    }
+}
+
+void matrix_scan_kb() {
+    cycle_leds();
+    matrix_scan_user();
+}
+
+bool process_record_kb(uint16_t keycode, keyrecord_t *record) {
+
+    uint8_t row = record->event.key.row;
+    uint8_t col = record->event.key.col;
+
+    if(row == 0 && col >= 0 && col < MATRIX_COLS) {
+        led_state[col] = record->event.pressed;
+    }
+
+    return process_record_user(keycode, record);
+}

keyboards/makeymakey/makeymakey.h

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+/* Copyright 2022 Jose Pablo Ramirez <jp.ramangulo@gmail.com>
+ *
+ * This program is free software: you can redistribute it and/or modify
+ * it under the terms of the GNU General Public License as published by
+ * the Free Software Foundation, either version 2 of the License, or
+ * (at your option) any later version.
+ *
+ * This program is distributed in the hope that it will be useful,
+ * but WITHOUT ANY WARRANTY; without even the implied warranty of
+ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+ * GNU General Public License for more details.
+ *
+ * You should have received a copy of the GNU General Public License
+ * along with this program.  If not, see <http://www.gnu.org/licenses/>.
+ */
+
+#pragma once
+
+#include "quantum.h"
+
+// clang-format off
+ #define LAYOUT( \
+    K00, K01, K02, K03, K04, K05, \
+    K10, K11, K12, K13, K14, K15, \
+    K20, K21, K22, K23, K24, K25  \
+ ) \
+ { \
+    { K00, K01, K02, K03, K04, K05 }, \
+    { K10, K11, K12, K13, K14, K15 }, \
+    { K20, K21, K22, K23, K24, K25 }  \
+ }
+// clang-format on

keyboards/makeymakey/readme.md

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+# Makey Makey Classic
+
+![makeymakey](https://cdn.shopify.com/s/files/1/0162/8612/products/Makey_Carlos_1024x1024_crop_center.png)
+
+The original Makey Makey Classic. There are six inputs on the front of the board, which can be attached to via alligator clipping, soldering to the pads, or any other method you can think of. There are another 12 inputs on the back, six for keyboard keys and six for mouse motion, which you can access with jumpers via the female headers.
+
+* Keyboard Maintainer: [Pablo Ramirez](https://github.com/Jpe230)
+* Hardware Supported: Makey Makey Classic (atmega32u4)
+* Hardware Availability: [Makey Makey official store] https://makeymakey.com/products/makey-makey-kit
+
+Make example for this keyboard (after setting up your build environment):
+
+    make makeymakey:default
+
+Flashing example for this keyboard:
+
+    make makeymakey: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).

keyboards/makeymakey/rules.mk

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+# MCU name
+MCU = atmega32u4
+
+# Bootloader selection
+BOOTLOADER = caterina
+
+# Build Options
+#   change yes to no to disable
+#
+BOOTMAGIC_ENABLE  = yes   # Enable Bootmagic Lite
+MOUSEKEY_ENABLE   = yes   # Mouse keys
+EXTRAKEY_ENABLE   = no   # Audio control and System control
+CONSOLE_ENABLE    = no    # Console for debug
+COMMAND_ENABLE    = no    # Commands for debug and configuration
+NKRO_ENABLE       = yes   # Enable N-Key Rollover
+BACKLIGHT_ENABLE  = no    # Enable keyboard backlight functionality
+RGBLIGHT_ENABLE   = no    # Enable keyboard RGB underglow
+AUDIO_ENABLE      = no    # Audio output