From 139a4f31ead8a5645ca948258e1a77838e93b0e7 Mon Sep 17 00:00:00 2001
From: Cameron Varley <cam.avarley@gmail.com>
Date: Sun, 2 Apr 2023 04:34:54 -0400
Subject: [PATCH] [Keyboard] Add GMMK Numpad (#20067)

Co-authored-by: Sergey Vlasov <sigprof@gmail.com>
Co-authored-by: Drashna Jaelre <drashna@live.com>
---
 keyboards/gmmk/numpad/keymaps/via/keymap.c | 79 ++++++++++++++++++++++
 keyboards/gmmk/numpad/keymaps/via/rules.mk |  2 +
 2 files changed, 81 insertions(+)
 create mode 100644 keyboards/gmmk/numpad/keymaps/via/keymap.c
 create mode 100644 keyboards/gmmk/numpad/keymaps/via/rules.mk

diff --git a/keyboards/gmmk/numpad/keymaps/via/keymap.c b/keyboards/gmmk/numpad/keymaps/via/keymap.c
new file mode 100644
index 00000000..aa7730ac
--- /dev/null
+++ b/keyboards/gmmk/numpad/keymaps/via/keymap.c
@@ -0,0 +1,79 @@
+/* Copyright 2021 Glorious, LLC <salman@pcgamingrace.com>
+Modified 2022 by rustedaperture for qmk_firmware
+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
+#include "analog.h"
+#include "qmk_midi.h"
+
+// clang-format off
+const uint16_t PROGMEM keymaps[][MATRIX_ROWS][MATRIX_COLS] = {
+
+//      NUM      /       *       -
+//      7        8       9       +
+//      4        5       6       ENCODER
+//      1        2       3       RET
+//      0                        .
+
+  [0] = LAYOUT(
+    MO(1),   KC_PSLS,   KC_PAST,   KC_PMNS,
+    KC_P7,   KC_P8,     KC_P9,     KC_PPLS,
+    KC_P4,   KC_P5,     KC_P6,     KC_CALC,
+    KC_P1,   KC_P2,     KC_P3,     KC_PENT,
+    KC_P0,                         KC_PDOT
+  ),
+  [1] = LAYOUT(
+    _______,   KC_PSLS,   KC_PAST,   KC_PMNS,
+    KC_P7,     RGB_VAI,   KC_P9,     KC_PPLS,
+    RGB_RMOD,  KC_P5,     RGB_MOD,   KC_CALC,
+    KC_P1,     RGB_VAD,   KC_P3,     KC_PENT,
+    RGB_TOG,                         QK_BOOT
+  ),
+  [2] = LAYOUT(
+    _______,   _______,   _______,   _______,
+    _______,   _______,   _______,   _______,
+    _______,   _______,   _______,   _______,
+    _______,   _______,   _______,   _______,
+    _______,                         _______
+  ),
+  [3] = LAYOUT(
+    _______,   _______,   _______,   _______,
+    _______,   _______,   _______,   _______,
+    _______,   _______,   _______,   _______,
+    _______,   _______,   _______,   _______,
+    _______,                         _______
+  ),
+};
+// clang-format on
+
+const uint16_t PROGMEM encoder_map[][NUM_ENCODERS][2] = {
+    [0] = { ENCODER_CCW_CW(KC_VOLD, KC_VOLU) },
+    [1] = { ENCODER_CCW_CW(KC_VOLD, KC_VOLU) },
+    [2] = { ENCODER_CCW_CW(KC_VOLD, KC_VOLU) },
+    [3] = { ENCODER_CCW_CW(KC_VOLD, KC_VOLU) }
+};
+
+// Potentiometer Slider, MIDI Control
+
+uint8_t divisor = 0;
+
+void slider(void) {
+    if (divisor++) { /* only run the slider function 1/256 times it's called */
+        return;
+    }
+    midi_send_cc(&midi_device, 2, 0x3E, 0x7F + (analogReadPin(SLIDER_PIN) >> 3));
+}
+
+void housekeeping_task_user(void) {
+    slider();
+}
\ No newline at end of file
diff --git a/keyboards/gmmk/numpad/keymaps/via/rules.mk b/keyboards/gmmk/numpad/keymaps/via/rules.mk
new file mode 100644
index 00000000..49d34e41
--- /dev/null
+++ b/keyboards/gmmk/numpad/keymaps/via/rules.mk
@@ -0,0 +1,2 @@
+VIA_ENABLE=yes
+ENCODER_MAP_ENABLE=yes