[Keyboard] Use old custom matrix for Drop Planck+Preonic (#14488)

Co-authored-by: Ryan <fauxpark@gmail.com>
Co-authored-by: Jack Humbert <jack.humb@gmail.com>

9 files changed, 919 insertions, 0 deletions

diff --git a/keyboards/preonic/rev3_drop/chconf.h b/keyboards/preonic/rev3_drop/chconf.h
new file mode 100644
index 0000000000..47dd995f81
--- /dev/null
+++ b/keyboards/preonic/rev3_drop/chconf.h
@@ -0,0 +1,29 @@
+/* Copyright 2021 QMK Contributors
+ *
+ * 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/>.
+ */
+
+/*
+ * This file was auto-generated by:
+ *    `qmk chibios-confmigrate -i keyboards/preonic/rev3/chconf.h -r platforms/chibios/QMK_PROTON_C/configs/chconf.h`
+ */
+
+#pragma once
+
+#define CH_CFG_ST_RESOLUTION 16
+
+#define CH_CFG_ST_FREQUENCY 10000
+
+#include_next <chconf.h>
+
diff --git a/keyboards/preonic/rev3_drop/config.h b/keyboards/preonic/rev3_drop/config.h
new file mode 100644
index 0000000000..1a0605e739
--- /dev/null
+++ b/keyboards/preonic/rev3_drop/config.h
@@ -0,0 +1,110 @@
+/*
+ * Copyright 2018 Jack Humbert <jack.humb@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
+
+/* USB Device descriptor parameter */
+#define DEVICE_VER 0x0003
+#define PRODUCT_ID 0xA649
+#undef MANUFACTURER
+#define MANUFACTURER Drop
+
+#undef MATRIX_ROWS
+#undef MATRIX_COLS
+/* key matrix size */
+#define MATRIX_ROWS 10
+#define MATRIX_COLS 6
+
+#undef MATRIX_ROW_PINS
+#undef MATRIX_COL_PINS
+#define MATRIX_ROW_PINS { A10, A9, A8, B15, C13, C14, C15, A2, A3, A6 }
+#define MATRIX_COL_PINS { B11, B10, B2, B1, A7, B0 }
+#define UNUSED_PINS
+
+#define ENCODERS_PAD_A { B12 }
+#define ENCODERS_PAD_B { B13 }
+
+#define DIP_SWITCH_PINS { B14, A15, A0, B9 }
+
+#define MUSIC_MAP
+#undef AUDIO_VOICES
+#undef AUDIO_PIN
+#define AUDIO_PIN A5
+#define AUDIO_PIN_ALT A4
+#define AUDIO_PIN_ALT_AS_NEGATIVE
+
+/* Debounce reduces chatter (unintended double-presses) - set 0 if debouncing is not needed */
+// #define DEBOUNCE 6
+
+/* Mechanical locking support. Use KC_LCAP, KC_LNUM or KC_LSCR instead in keymap */
+//#define LOCKING_SUPPORT_ENABLE
+/* Locking resynchronize hack */
+//#define LOCKING_RESYNC_ENABLE
+
+/*
+ * Force NKRO
+ *
+ * Force NKRO (nKey Rollover) to be enabled by default, regardless of the saved
+ * state in the bootmagic EEPROM settings. (Note that NKRO must be enabled in the
+ * makefile for this to work.)
+ *
+ * If forced on, NKRO can be disabled via magic key (default = LShift+RShift+N)
+ * until the next keyboard reset.
+ *
+ * NKRO may prevent your keystrokes from being detected in the BIOS, but it is
+ * fully operational during normal computer usage.
+ *
+ * For a less heavy-handed approach, enable NKRO via magic key (LShift+RShift+N)
+ * or via bootmagic (hold SPACE+N while plugging in the keyboard). Once set by
+ * bootmagic, NKRO mode will always be enabled until it is toggled again during a
+ * power-up.
+ *
+ */
+//#define FORCE_NKRO
+
+/*
+ * Feature disable options
+ *  These options are also useful to firmware size reduction.
+ */
+
+/* disable debug print */
+//#define NO_DEBUG
+
+/* disable print */
+//#define NO_PRINT
+
+/* disable action features */
+//#define NO_ACTION_LAYER
+//#define NO_ACTION_TAPPING
+//#define NO_ACTION_ONESHOT
+//#define NO_ACTION_MACRO
+//#define NO_ACTION_FUNCTION
+
+/*
+ * WS2812 Underglow Matrix options
+ */
+#define RGB_DI_PIN A1
+#define RGBLED_NUM 9
+#define RGBLIGHT_ANIMATIONS
+// RGB Matrix support
+#define DRIVER_LED_TOTAL RGBLED_NUM
+
+#define WS2812_PWM_DRIVER PWMD2
+#define WS2812_PWM_CHANNEL 2
+#define WS2812_PWM_PAL_MODE 1
+#define WS2812_DMA_STREAM STM32_DMA1_STREAM2
+#define WS2812_DMA_CHANNEL 2
diff --git a/keyboards/preonic/rev3_drop/halconf.h b/keyboards/preonic/rev3_drop/halconf.h
new file mode 100644
index 0000000000..48b76d2f44
--- /dev/null
+++ b/keyboards/preonic/rev3_drop/halconf.h
@@ -0,0 +1,22 @@
+/* Copyright 2020 QMK
+ *
+ *  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 3 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 <https://www.gnu.org/licenses/>.
+ */
+#pragma once
+
+#define HAL_USE_PWM TRUE
+#define HAL_USE_GPT TRUE
+#define HAL_USE_DAC TRUE
+
+#include_next <halconf.h>
diff --git a/keyboards/preonic/rev3_drop/info.json b/keyboards/preonic/rev3_drop/info.json
new file mode 100644
index 0000000000..8b7a65384e
--- /dev/null
+++ b/keyboards/preonic/rev3_drop/info.json
@@ -0,0 +1,342 @@
+{
+    "keyboard_name": "Preonic rev. 3",
+    "url": "https://olkb.com/preonic",
+    "maintainer": "jackhumbert",
+    "layouts": {
+        "LAYOUT_preonic_1x2uC": {
+            "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": 6, "y": 0},
+                {"x": 7, "y": 0},
+                {"x": 8, "y": 0},
+                {"x": 9, "y": 0},
+                {"x": 10, "y": 0},
+                {"x": 11, "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": 6, "y": 1},
+                {"x": 7, "y": 1},
+                {"x": 8, "y": 1},
+                {"x": 9, "y": 1},
+                {"x": 10, "y": 1},
+                {"x": 11, "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},
+                {"x": 6, "y": 2},
+                {"x": 7, "y": 2},
+                {"x": 8, "y": 2},
+                {"x": 9, "y": 2},
+                {"x": 10, "y": 2},
+                {"x": 11, "y": 2},
+
+                {"x": 0, "y": 3},
+                {"x": 1, "y": 3},
+                {"x": 2, "y": 3},
+                {"x": 3, "y": 3},
+                {"x": 4, "y": 3},
+                {"x": 5, "y": 3},
+                {"x": 6, "y": 3},
+                {"x": 7, "y": 3},
+                {"x": 8, "y": 3},
+                {"x": 9, "y": 3},
+                {"x": 10, "y": 3},
+                {"x": 11, "y": 3},
+
+                {"x": 0, "y": 4},
+                {"x": 1, "y": 4},
+                {"x": 2, "y": 4},
+                {"x": 3, "y": 4},
+                {"x": 4, "y": 4},
+                {"x": 5, "y": 4, "w": 2},
+                {"x": 7, "y": 4},
+                {"x": 8, "y": 4},
+                {"x": 9, "y": 4},
+                {"x": 10, "y": 4},
+                {"x": 11, "y": 4}
+            ]
+        },
+        "LAYOUT_preonic_1x2uR": {
+            "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": 6, "y": 0},
+                {"x": 7, "y": 0},
+                {"x": 8, "y": 0},
+                {"x": 9, "y": 0},
+                {"x": 10, "y": 0},
+                {"x": 11, "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": 6, "y": 1},
+                {"x": 7, "y": 1},
+                {"x": 8, "y": 1},
+                {"x": 9, "y": 1},
+                {"x": 10, "y": 1},
+                {"x": 11, "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},
+                {"x": 6, "y": 2},
+                {"x": 7, "y": 2},
+                {"x": 8, "y": 2},
+                {"x": 9, "y": 2},
+                {"x": 10, "y": 2},
+                {"x": 11, "y": 2},
+
+                {"x": 0, "y": 3},
+                {"x": 1, "y": 3},
+                {"x": 2, "y": 3},
+                {"x": 3, "y": 3},
+                {"x": 4, "y": 3},
+                {"x": 5, "y": 3},
+                {"x": 6, "y": 3},
+                {"x": 7, "y": 3},
+                {"x": 8, "y": 3},
+                {"x": 9, "y": 3},
+                {"x": 10, "y": 3},
+                {"x": 11, "y": 3},
+
+                {"x": 0, "y": 4},
+                {"x": 1, "y": 4},
+                {"x": 2, "y": 4},
+                {"x": 3, "y": 4},
+                {"x": 4, "y": 4},
+                {"x": 5, "y": 4},
+                {"x": 6, "y": 4, "w": 2},
+                {"x": 8, "y": 4},
+                {"x": 9, "y": 4},
+                {"x": 10, "y": 4},
+                {"x": 11, "y": 4}
+            ]
+        },
+        "LAYOUT_preonic_1x2uL": {
+            "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": 6, "y": 0},
+                {"x": 7, "y": 0},
+                {"x": 8, "y": 0},
+                {"x": 9, "y": 0},
+                {"x": 10, "y": 0},
+                {"x": 11, "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": 6, "y": 1},
+                {"x": 7, "y": 1},
+                {"x": 8, "y": 1},
+                {"x": 9, "y": 1},
+                {"x": 10, "y": 1},
+                {"x": 11, "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},
+                {"x": 6, "y": 2},
+                {"x": 7, "y": 2},
+                {"x": 8, "y": 2},
+                {"x": 9, "y": 2},
+                {"x": 10, "y": 2},
+                {"x": 11, "y": 2},
+
+                {"x": 0, "y": 3},
+                {"x": 1, "y": 3},
+                {"x": 2, "y": 3},
+                {"x": 3, "y": 3},
+                {"x": 4, "y": 3},
+                {"x": 5, "y": 3},
+                {"x": 6, "y": 3},
+                {"x": 7, "y": 3},
+                {"x": 8, "y": 3},
+                {"x": 9, "y": 3},
+                {"x": 10, "y": 3},
+                {"x": 11, "y": 3},
+
+                {"x": 0, "y": 4},
+                {"x": 1, "y": 4},
+                {"x": 2, "y": 4},
+                {"x": 3, "y": 4},
+                {"x": 4, "y": 4, "w": 2},
+                {"x": 6, "y": 4},
+                {"x": 7, "y": 4},
+                {"x": 8, "y": 4},
+                {"x": 9, "y": 4},
+                {"x": 10, "y": 4},
+                {"x": 11, "y": 4}
+            ]
+        },
+        "LAYOUT_preonic_2x2u": {
+            "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": 6, "y": 0},
+                {"x": 7, "y": 0},
+                {"x": 8, "y": 0},
+                {"x": 9, "y": 0},
+                {"x": 10, "y": 0},
+                {"x": 11, "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": 6, "y": 1},
+                {"x": 7, "y": 1},
+                {"x": 8, "y": 1},
+                {"x": 9, "y": 1},
+                {"x": 10, "y": 1},
+                {"x": 11, "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},
+                {"x": 6, "y": 2},
+                {"x": 7, "y": 2},
+                {"x": 8, "y": 2},
+                {"x": 9, "y": 2},
+                {"x": 10, "y": 2},
+                {"x": 11, "y": 2},
+
+                {"x": 0, "y": 3},
+                {"x": 1, "y": 3},
+                {"x": 2, "y": 3},
+                {"x": 3, "y": 3},
+                {"x": 4, "y": 3},
+                {"x": 5, "y": 3},
+                {"x": 6, "y": 3},
+                {"x": 7, "y": 3},
+                {"x": 8, "y": 3},
+                {"x": 9, "y": 3},
+                {"x": 10, "y": 3},
+                {"x": 11, "y": 3},
+
+                {"x": 0, "y": 4},
+                {"x": 1, "y": 4},
+                {"x": 2, "y": 4},
+                {"x": 3, "y": 4},
+                {"x": 4, "y": 4, "w": 2},
+                {"x": 6, "y": 4, "w": 2},
+                {"x": 8, "y": 4},
+                {"x": 9, "y": 4},
+                {"x": 10, "y": 4},
+                {"x": 11, "y": 4}
+            ]
+        },
+        "LAYOUT_ortho_5x12": {
+            "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": 6, "y": 0},
+                {"x": 7, "y": 0},
+                {"x": 8, "y": 0},
+                {"x": 9, "y": 0},
+                {"x": 10, "y": 0},
+                {"x": 11, "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": 6, "y": 1},
+                {"x": 7, "y": 1},
+                {"x": 8, "y": 1},
+                {"x": 9, "y": 1},
+                {"x": 10, "y": 1},
+                {"x": 11, "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},
+                {"x": 6, "y": 2},
+                {"x": 7, "y": 2},
+                {"x": 8, "y": 2},
+                {"x": 9, "y": 2},
+                {"x": 10, "y": 2},
+                {"x": 11, "y": 2},
+
+                {"x": 0, "y": 3},
+                {"x": 1, "y": 3},
+                {"x": 2, "y": 3},
+                {"x": 3, "y": 3},
+                {"x": 4, "y": 3},
+                {"x": 5, "y": 3},
+                {"x": 6, "y": 3},
+                {"x": 7, "y": 3},
+                {"x": 8, "y": 3},
+                {"x": 9, "y": 3},
+                {"x": 10, "y": 3},
+                {"x": 11, "y": 3},
+
+                {"x": 0, "y": 4},
+                {"x": 1, "y": 4},
+                {"x": 2, "y": 4},
+                {"x": 3, "y": 4},
+                {"x": 4, "y": 4},
+                {"x": 5, "y": 4},
+                {"x": 6, "y": 4},
+                {"x": 7, "y": 4},
+                {"x": 8, "y": 4},
+                {"x": 9, "y": 4},
+                {"x": 10, "y": 4},
+                {"x": 11, "y": 4}
+            ]
+        }
+    }
+}
diff --git a/keyboards/preonic/rev3_drop/matrix.c b/keyboards/preonic/rev3_drop/matrix.c
new file mode 100644
index 0000000000..b094d28cdc
--- /dev/null
+++ b/keyboards/preonic/rev3_drop/matrix.c
@@ -0,0 +1,168 @@
+/*
+ * Copyright 2018 Jack Humbert <jack.humb@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 <stdint.h>
+#include <stdbool.h>
+#include <string.h>
+#include "hal.h"
+#include "timer.h"
+#include "wait.h"
+#include "debug.h"
+#include "matrix.h"
+
+/*
+ *     col: { B11, B10, B2, B1, A7, B0 }
+ *     row: { A10, A9, A8, B15, C13, C14, C15, A2 }
+ */
+/* matrix state(1:on, 0:off) */
+static matrix_row_t matrix[MATRIX_ROWS];
+static matrix_row_t matrix_debouncing[MATRIX_COLS];
+static bool         debouncing      = false;
+static uint16_t     debouncing_time = 0;
+
+__attribute__((weak)) void matrix_init_user(void) {}
+
+__attribute__((weak)) void matrix_scan_user(void) {}
+
+__attribute__((weak)) void matrix_init_kb(void) { matrix_init_user(); }
+
+__attribute__((weak)) void matrix_scan_kb(void) { matrix_scan_user(); }
+
+void matrix_init(void) {
+    printf("matrix init\n");
+    // debug_matrix = true;
+
+    // actual matrix setup
+    palSetPadMode(GPIOB, 11, PAL_MODE_OUTPUT_PUSHPULL);
+    palSetPadMode(GPIOB, 10, PAL_MODE_OUTPUT_PUSHPULL);
+    palSetPadMode(GPIOB, 2, PAL_MODE_OUTPUT_PUSHPULL);
+    palSetPadMode(GPIOB, 1, PAL_MODE_OUTPUT_PUSHPULL);
+    palSetPadMode(GPIOA, 7, PAL_MODE_OUTPUT_PUSHPULL);
+    palSetPadMode(GPIOB, 0, PAL_MODE_OUTPUT_PUSHPULL);
+
+    palSetPadMode(GPIOA, 10, PAL_MODE_INPUT_PULLDOWN);
+    palSetPadMode(GPIOA, 9, PAL_MODE_INPUT_PULLDOWN);
+    palSetPadMode(GPIOA, 8, PAL_MODE_INPUT_PULLDOWN);
+    palSetPadMode(GPIOB, 15, PAL_MODE_INPUT_PULLDOWN);
+    palSetPadMode(GPIOC, 13, PAL_MODE_INPUT_PULLDOWN);
+    palSetPadMode(GPIOC, 14, PAL_MODE_INPUT_PULLDOWN);
+    palSetPadMode(GPIOC, 15, PAL_MODE_INPUT_PULLDOWN);
+    palSetPadMode(GPIOA, 2, PAL_MODE_INPUT_PULLDOWN);
+    palSetPadMode(GPIOA, 3, PAL_MODE_INPUT_PULLDOWN);
+    palSetPadMode(GPIOA, 6, PAL_MODE_INPUT_PULLDOWN);
+
+    memset(matrix, 0, MATRIX_ROWS * sizeof(matrix_row_t));
+    memset(matrix_debouncing, 0, MATRIX_COLS * sizeof(matrix_row_t));
+
+    matrix_init_quantum();
+}
+
+uint8_t matrix_scan(void) {
+    // actual matrix
+    for (int col = 0; col < MATRIX_COLS; col++) {
+        matrix_row_t data = 0;
+
+        // strobe col { B11, B10, B2, B1, A7, B0 }
+        switch (col) {
+            case 0:
+                palSetPad(GPIOB, 11);
+                break;
+            case 1:
+                palSetPad(GPIOB, 10);
+                break;
+            case 2:
+                palSetPad(GPIOB, 2);
+                break;
+            case 3:
+                palSetPad(GPIOB, 1);
+                break;
+            case 4:
+                palSetPad(GPIOA, 7);
+                break;
+            case 5:
+                palSetPad(GPIOB, 0);
+                break;
+        }
+
+        // need wait to settle pin state
+        wait_us(20);
+
+        // read row data { A10, A9, A8, B15, C13, C14, C15, A2 }
+        data = ((palReadPad(GPIOA, 10) << 0) | (palReadPad(GPIOA, 9) << 1) | (palReadPad(GPIOA, 8) << 2) | (palReadPad(GPIOB, 15) << 3) | (palReadPad(GPIOC, 13) << 4) | (palReadPad(GPIOC, 14) << 5) | (palReadPad(GPIOC, 15) << 6) | (palReadPad(GPIOA, 2) << 7) | (palReadPad(GPIOA, 3) << 8) | (palReadPad(GPIOA, 6) << 9));
+
+        // unstrobe  col { B11, B10, B2, B1, A7, B0 }
+        switch (col) {
+            case 0:
+                palClearPad(GPIOB, 11);
+                break;
+            case 1:
+                palClearPad(GPIOB, 10);
+                break;
+            case 2:
+                palClearPad(GPIOB, 2);
+                break;
+            case 3:
+                palClearPad(GPIOB, 1);
+                break;
+            case 4:
+                palClearPad(GPIOA, 7);
+                break;
+            case 5:
+                palClearPad(GPIOB, 0);
+                break;
+        }
+
+        if (matrix_debouncing[col] != data) {
+            matrix_debouncing[col] = data;
+            debouncing             = true;
+            debouncing_time        = timer_read();
+        }
+    }
+
+    if (debouncing && timer_elapsed(debouncing_time) > DEBOUNCE) {
+        for (int row = 0; row < MATRIX_ROWS; row++) {
+            matrix[row] = 0;
+            for (int col = 0; col < MATRIX_COLS; col++) {
+                matrix[row] |= ((matrix_debouncing[col] & (1 << row) ? 1 : 0) << col);
+            }
+        }
+        debouncing = false;
+    }
+
+    matrix_scan_quantum();
+
+    return 1;
+}
+
+bool matrix_is_on(uint8_t row, uint8_t col) { return (matrix[row] & (1 << col)); }
+
+matrix_row_t matrix_get_row(uint8_t row) { return matrix[row]; }
+
+void matrix_print(void) {
+    printf("\nr/c 01234567\n");
+    for (uint8_t row = 0; row < MATRIX_ROWS; row++) {
+        printf("%X0: ", row);
+        matrix_row_t data = matrix_get_row(row);
+        for (int col = 0; col < MATRIX_COLS; col++) {
+            if (data & (1 << col))
+                printf("1");
+            else
+                printf("0");
+        }
+        printf("\n");
+    }
+}
diff --git a/keyboards/preonic/rev3_drop/mcuconf.h b/keyboards/preonic/rev3_drop/mcuconf.h
new file mode 100644
index 0000000000..31abf13b63
--- /dev/null
+++ b/keyboards/preonic/rev3_drop/mcuconf.h
@@ -0,0 +1,39 @@
+/* Copyright 2020 QMK Contributors
+ *
+ * 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 3 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_next "mcuconf.h"
+
+// The SysTick timer from the normal quantum/stm32 uses TIM2 -- the WS2812 pin used
+// on the Planck requires the use of TIM2 to run PWM -- rework which timers are
+// allocated for PWM usage.
+#undef STM32_PWM_USE_TIM2
+#define STM32_PWM_USE_TIM2 TRUE
+
+#undef STM32_DAC_USE_DAC1_CH1
+#define STM32_DAC_USE_DAC1_CH1 TRUE
+#undef STM32_DAC_USE_DAC1_CH2
+#define STM32_DAC_USE_DAC1_CH2 TRUE
+#undef STM32_GPT_USE_TIM6
+#define STM32_GPT_USE_TIM6 TRUE
+#undef STM32_GPT_USE_TIM7
+#define STM32_GPT_USE_TIM7 TRUE
+#undef STM32_GPT_USE_TIM8
+#define STM32_GPT_USE_TIM8 TRUE
+
+// As mentioned above, we need to reallocate the SysTick timer used from
+// TIM2 to TIM3.
+#undef STM32_ST_USE_TIMER
+#define STM32_ST_USE_TIMER 3
diff --git a/keyboards/preonic/rev3_drop/rev3_drop.c b/keyboards/preonic/rev3_drop/rev3_drop.c
new file mode 100644
index 0000000000..0b3f452c44
--- /dev/null
+++ b/keyboards/preonic/rev3_drop/rev3_drop.c
@@ -0,0 +1,61 @@
+/* Copyright 2018 Jack Humbert <jack.humb@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 "rev3_drop.h"
+
+#ifdef RGB_MATRIX_ENABLE
+led_config_t g_led_config = { {
+    // Key Matrix to LED Index
+    { NO_LED, 6,      NO_LED, NO_LED, 5,      NO_LED },
+    { NO_LED, NO_LED, NO_LED, NO_LED, NO_LED, NO_LED },
+    { NO_LED, NO_LED, NO_LED, NO_LED, NO_LED, 0      },
+    { NO_LED, NO_LED, NO_LED, NO_LED, NO_LED, NO_LED },
+    { NO_LED, 4,      NO_LED, NO_LED, 3,      NO_LED },
+    { NO_LED, NO_LED, NO_LED, NO_LED, NO_LED, NO_LED },
+    { NO_LED, NO_LED, NO_LED, NO_LED, NO_LED, NO_LED },
+    { NO_LED, NO_LED, NO_LED, NO_LED, NO_LED, NO_LED },
+    { NO_LED, 7,      NO_LED, NO_LED, 2,      NO_LED },
+    { NO_LED, 1,      NO_LED, NO_LED, 8,      NO_LED },
+}, {
+    // LED Index to Physical Position
+    {112, 39}, {148, 60}, {206, 53}, {206, 3}, {150, 3}, {74, 3}, {18, 3}, {18, 54}, {77, 60}
+}, {
+    // LED Index to Flag
+    LED_FLAG_ALL, LED_FLAG_ALL, LED_FLAG_ALL, LED_FLAG_ALL, LED_FLAG_ALL,
+    LED_FLAG_ALL, LED_FLAG_ALL, LED_FLAG_ALL, LED_FLAG_ALL
+} };
+
+// LED physical location index
+//     6 5 4 3
+//        0
+//     7 8 1 2
+#endif
+
+
+#ifdef SWAP_HANDS_ENABLE
+__attribute__ ((weak))
+const keypos_t PROGMEM hand_swap_config[MATRIX_ROWS][MATRIX_COLS] = {
+    {{5, 4}, {4, 4}, {3, 4}, {2, 4}, {1, 4}, {0, 4}},
+    {{5, 5}, {4, 5}, {3, 5}, {2, 5}, {1, 5}, {0, 5}},
+    {{5, 6}, {4, 6}, {3, 6}, {2, 6}, {1, 6}, {0, 6}},
+    {{5, 7}, {4, 7}, {3, 7}, {2, 7}, {1, 7}, {0, 7}},
+    {{5, 0}, {4, 0}, {3, 0}, {2, 0}, {1, 0}, {0, 0}},
+    {{5, 1}, {4, 1}, {3, 1}, {2, 1}, {1, 1}, {0, 1}},
+    {{5, 2}, {4, 2}, {3, 2}, {2, 2}, {1, 2}, {0, 2}},
+    {{5, 3}, {4, 3}, {3, 3}, {2, 3}, {1, 3}, {0, 3}},
+    {{5, 8}, {4, 8}, {3, 8}, {2, 8}, {1, 8}, {0, 8}},
+    {{5, 9}, {4, 9}, {3, 9}, {2, 9}, {1, 9}, {0, 9}},
+};
+#endif
diff --git a/keyboards/preonic/rev3_drop/rev3_drop.h b/keyboards/preonic/rev3_drop/rev3_drop.h
new file mode 100644
index 0000000000..3cb9368757
--- /dev/null
+++ b/keyboards/preonic/rev3_drop/rev3_drop.h
@@ -0,0 +1,115 @@
+/* Copyright 2018 Jack Humbert <jack.humb@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 "preonic.h"
+
+// clang-format off
+#define LAYOUT_preonic_1x2uC( \
+    k00, k01, k02, k03, k04, k05, k06, k07, k08, k09, k0a, k0b, \
+    k10, k11, k12, k13, k14, k15, k16, k17, k18, k19, k1a, k1b, \
+    k20, k21, k22, k23, k24, k25, k26, k27, k28, k29, k2a, k2b, \
+    k30, k31, k32, k33, k34, k35, k36, k37, k38, k39, k3a, k3b, \
+    k40, k41, k42, k43, k44,    k45,   k47, k48, k49, k4a, k4b \
+) { \
+    { k00, k01, k02, k03, k04, k05 }, \
+    { k10, k11, k12, k13, k14, k15 }, \
+    { k20, k21, k22, k23, k24, k25 }, \
+    { k30, k31, k32, k33, k34, k35 }, \
+    { k06, k07, k08, k09, k0a, k0b }, \
+    { k16, k17, k18, k19, k1a, k1b }, \
+    { k26, k27, k28, k29, k2a, k2b }, \
+    { k36, k37, k38, k39, k3a, k3b }, \
+    { k40, k41, k42, k49, k4a, k4b }, \
+    { k45, k47, k48, k43, k44, k45 } \
+}
+
+#define LAYOUT_preonic_1x2uR( \
+    k00, k01, k02, k03, k04, k05, k06, k07, k08, k09, k0a, k0b, \
+    k10, k11, k12, k13, k14, k15, k16, k17, k18, k19, k1a, k1b, \
+    k20, k21, k22, k23, k24, k25, k26, k27, k28, k29, k2a, k2b, \
+    k30, k31, k32, k33, k34, k35, k36, k37, k38, k39, k3a, k3b, \
+    k40, k41, k42, k43, k44, k45,   k47,    k48, k49, k4a, k4b \
+  ) { \
+    { k00, k01, k02, k03, k04, k05 }, \
+    { k10, k11, k12, k13, k14, k15 }, \
+    { k20, k21, k22, k23, k24, k25 }, \
+    { k30, k31, k32, k33, k34, k35 }, \
+    { k06, k07, k08, k09, k0a, k0b }, \
+    { k16, k17, k18, k19, k1a, k1b }, \
+    { k26, k27, k28, k29, k2a, k2b }, \
+    { k36, k37, k38, k39, k3a, k3b }, \
+    { k40, k41, k42, k49, k4a, k4b }, \
+    { k47, k47, k48, k43, k44, k45 } \
+}
+
+#define LAYOUT_preonic_1x2uL( \
+    k00, k01, k02, k03, k04, k05, k06, k07, k08, k09, k0a, k0b, \
+    k10, k11, k12, k13, k14, k15, k16, k17, k18, k19, k1a, k1b, \
+    k20, k21, k22, k23, k24, k25, k26, k27, k28, k29, k2a, k2b, \
+    k30, k31, k32, k33, k34, k35, k36, k37, k38, k39, k3a, k3b, \
+    k40, k41, k42, k43,   k44,    k46, k47, k48, k49, k4a, k4b \
+) { \
+    { k00, k01, k02, k03, k04, k05 }, \
+    { k10, k11, k12, k13, k14, k15 }, \
+    { k20, k21, k22, k23, k24, k25 }, \
+    { k30, k31, k32, k33, k34, k35 }, \
+    { k06, k07, k08, k09, k0a, k0b }, \
+    { k16, k17, k18, k19, k1a, k1b }, \
+    { k26, k27, k28, k29, k2a, k2b }, \
+    { k36, k37, k38, k39, k3a, k3b }, \
+    { k40, k41, k42, k49, k4a, k4b }, \
+    { k46, k47, k48, k43, k44, k44 } \
+}
+
+#define LAYOUT_preonic_2x2u( \
+    k00, k01, k02, k03, k04, k05, k06, k07, k08, k09, k0a, k0b, \
+    k10, k11, k12, k13, k14, k15, k16, k17, k18, k19, k1a, k1b, \
+    k20, k21, k22, k23, k24, k25, k26, k27, k28, k29, k2a, k2b, \
+    k30, k31, k32, k33, k34, k35, k36, k37, k38, k39, k3a, k3b, \
+    k40, k41, k42, k43,   k44,      k46,    k48, k49, k4a, k4b \
+) { \
+    { k00, k01, k02, k03, k04, k05 }, \
+    { k10, k11, k12, k13, k14, k15 }, \
+    { k20, k21, k22, k23, k24, k25 }, \
+    { k30, k31, k32, k33, k34, k35 }, \
+    { k06, k07, k08, k09, k0a, k0b }, \
+    { k16, k17, k18, k19, k1a, k1b }, \
+    { k26, k27, k28, k29, k2a, k2b }, \
+    { k36, k37, k38, k39, k3a, k3b }, \
+    { k40, k41, k42, k49, k4a, k4b }, \
+    { k46, k46, k48, k43, k44, k44 } \
+}
+
+#define LAYOUT_ortho_5x12( \
+    k00, k01, k02, k03, k04, k05, k06, k07, k08, k09, k0a, k0b, \
+    k10, k11, k12, k13, k14, k15, k16, k17, k18, k19, k1a, k1b, \
+    k20, k21, k22, k23, k24, k25, k26, k27, k28, k29, k2a, k2b, \
+    k30, k31, k32, k33, k34, k35, k36, k37, k38, k39, k3a, k3b, \
+    k40, k41, k42, k43, k44, k45, k46, k47, k48, k49, k4a, k4b \
+) { \
+    { k00, k01, k02, k03, k04, k05 }, \
+    { k10, k11, k12, k13, k14, k15 }, \
+    { k20, k21, k22, k23, k24, k25 }, \
+    { k30, k31, k32, k33, k34, k35 }, \
+    { k06, k07, k08, k09, k0a, k0b }, \
+    { k16, k17, k18, k19, k1a, k1b }, \
+    { k26, k27, k28, k29, k2a, k2b }, \
+    { k36, k37, k38, k39, k3a, k3b }, \
+    { k40, k41, k42, k49, k4a, k4b }, \
+    { k46, k47, k48, k43, k44, k45 } \
+}
diff --git a/keyboards/preonic/rev3_drop/rules.mk b/keyboards/preonic/rev3_drop/rules.mk
new file mode 100644
index 0000000000..8ab62afe21
--- /dev/null
+++ b/keyboards/preonic/rev3_drop/rules.mk
@@ -0,0 +1,33 @@
+# MCU name
+MCU = STM32F303
+
+# Bootloader selection
+BOOTLOADER = stm32-dfu
+
+# Build Options
+#   change yes to no to disable
+#
+BOOTMAGIC_ENABLE = yes      # Enable Bootmagic Lite
+MOUSEKEY_ENABLE = yes       # Mouse keys
+EXTRAKEY_ENABLE = yes       # Audio control and System control
+CONSOLE_ENABLE = yes        # Console for debug
+COMMAND_ENABLE = yes        # Commands for debug and configuration
+# Do not enable SLEEP_LED_ENABLE. it uses the same timer as BACKLIGHT_ENABLE
+SLEEP_LED_ENABLE = no       # Breathing sleep LED during USB suspend
+# if this doesn't work, see here: https://github.com/tmk/tmk_keyboard/wiki/FAQ#nkro-doesnt-work
+NKRO_ENABLE = yes           # USB Nkey Rollover
+BACKLIGHT_ENABLE = no       # Enable keyboard backlight functionality
+RGBLIGHT_ENABLE = yes       # Enable keyboard RGB underglow
+AUDIO_ENABLE = yes          # Audio output
+WS2812_DRIVER = pwm
+CUSTOM_MATRIX = yes
+ENCODER_ENABLE = yes
+DIP_SWITCH_ENABLE = yes
+
+# Do not enable RGB_MATRIX_ENABLE together with RGBLIGHT_ENABLE
+RGB_MATRIX_ENABLE = no
+RGB_MATRIX_DRIVER = WS2812
+
+SRC += matrix.c
+
+LAYOUTS = ortho_5x12