bastardkb/charybdis: add support for Charybdis (4x6 and 3x5) (#15333)

31 files changed, 2505 insertions, 0 deletions

diff --git a/keyboards/bastardkb/charybdis/3x5/3x5.c b/keyboards/bastardkb/charybdis/3x5/3x5.c
new file mode 100644
index 0000000000..d896cf6923
--- /dev/null
+++ b/keyboards/bastardkb/charybdis/3x5/3x5.c
@@ -0,0 +1,83 @@
+/*
+ * Copyright 2020 Christopher Courtney <drashna@live.com> (@drashna)
+ * Copyright 2021 Quentin LEBASTARD <qlebastard@gmail.com>
+ * Copyright 2021 Charly Delay <charly@codesink.dev> (@0xcharly)
+ *
+ * This program is free software: you can redistribute it and/or modify
+ * it under the terms of the GNU General Publicw 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 "3x5.h"
+
+// clang-format off
+#ifdef RGB_MATRIX_ENABLE
+/**
+ * \brief LEDs index.
+ *
+ * ╭────────────────────╮                 ╭────────────────────╮
+ *    2   3   8   9  12                     30  27  26  21  20
+ * ├────────────────────┤                 ├────────────────────┤
+ *    1   4   7  10  13                     31  28  25  22  19
+ * ├────────────────────┤                 ├────────────────────┤
+ *    0   5   6  11  14                     32  29  24  23  18
+ * ╰────────────────────╯                 ╰────────────────────╯
+ *                   15  16  17     33  34  XX
+ *                 ╰────────────╯ ╰────────────╯
+ */
+led_config_t g_led_config = { {
+    /* Key Matrix to LED index. */
+    // Left split.
+    {      2,      3,      8,      9,     12 }, // Top row
+    {      1,      4,      7,     10,     13 }, // Middle row
+    {      0,      5,      6,     11,     14 }, // Bottom row
+    {     17, NO_LED,     15,     16, NO_LED }, // Thumb cluster
+    // Right split.
+    {     20,     21,     26,     27,     30 }, // Top row
+    {     19,     22,     25,     28,     31 }, // Middle row
+    {     18,     23,     24,     29,     32 }, // Bottom row
+    {     33, NO_LED,     34, NO_LED, NO_LED }, // Thumb cluster
+}, {
+    /* LED index to physical position. */
+    // Left split.
+    /* index=0  */ {   0,  42 }, {   0,  21 }, {   0,   0 }, // col 1 (left most)
+    /* index=3  */ {  18,   0 }, {  18,  21 }, {  18,  42 }, // col 2
+    /* index=6  */ {  36,  42 }, {  36,  21 }, {  36,   0 },
+    /* index=9  */ {  54,   0 }, {  54,  21 }, {  54,  42 },
+    /* index=12 */ {  72,   0 }, {  72,  21 }, {  72,  42 },
+    /* index=15 */ {  72,  64 }, {  90,  64 }, { 108,  64 }, // Thumb cluster
+    // Right split.
+    /* index=18 */ { 224,  42 }, { 224,  21 }, { 224,   0 }, // col 10 (right most)
+    /* index=21 */ { 206,   0 }, { 206,  21 }, { 206,  42 }, // col 9
+    /* index=24 */ { 188,  42 }, { 188,  21 }, { 188,   0 },
+    /* index=27 */ { 170,   0 }, { 170,  21 }, { 170,  42 },
+    /* index=30 */ { 152,   0 }, { 152,  21 }, { 152,  42 },
+    /* index=33 */ { 152,  64 }, { 134,  64 },
+}, {
+    /* LED index to flag. */
+    // Left split.
+    /* index=0  */ LED_FLAG_KEYLIGHT, LED_FLAG_KEYLIGHT, LED_FLAG_KEYLIGHT, // col 1
+    /* index=3  */ LED_FLAG_KEYLIGHT, LED_FLAG_KEYLIGHT, LED_FLAG_KEYLIGHT, // col 2
+    /* index=6  */ LED_FLAG_KEYLIGHT, LED_FLAG_KEYLIGHT, LED_FLAG_KEYLIGHT,
+    /* index=9  */ LED_FLAG_KEYLIGHT, LED_FLAG_KEYLIGHT, LED_FLAG_KEYLIGHT,
+    /* index=12 */ LED_FLAG_KEYLIGHT, LED_FLAG_KEYLIGHT, LED_FLAG_KEYLIGHT,
+    /* index=15 */ LED_FLAG_MODIFIER, LED_FLAG_MODIFIER, LED_FLAG_MODIFIER, // Thumb cluster
+    // Right split.
+    /* index=18 */ LED_FLAG_KEYLIGHT, LED_FLAG_KEYLIGHT, LED_FLAG_KEYLIGHT, // col 10
+    /* index=21 */ LED_FLAG_KEYLIGHT, LED_FLAG_KEYLIGHT, LED_FLAG_KEYLIGHT, // col 9
+    /* index=24 */ LED_FLAG_KEYLIGHT, LED_FLAG_KEYLIGHT, LED_FLAG_KEYLIGHT,
+    /* index=27 */ LED_FLAG_KEYLIGHT, LED_FLAG_KEYLIGHT, LED_FLAG_KEYLIGHT,
+    /* index=30 */ LED_FLAG_KEYLIGHT, LED_FLAG_KEYLIGHT, LED_FLAG_KEYLIGHT,
+    /* index=33 */ LED_FLAG_KEYLIGHT, LED_FLAG_KEYLIGHT, // Thumb cluster
+} };
+#endif
+// clang-format on
diff --git a/keyboards/bastardkb/charybdis/3x5/3x5.h b/keyboards/bastardkb/charybdis/3x5/3x5.h
new file mode 100644
index 0000000000..665fcbeec2
--- /dev/null
+++ b/keyboards/bastardkb/charybdis/3x5/3x5.h
@@ -0,0 +1,67 @@
+/*
+ * Copyright 2021 Quentin LEBASTARD <qlebastard@gmail.com>
+ * Copyright 2021 Charly Delay <charly@codesink.dev> (@0xcharly)
+ *
+ * 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 "charybdis.h"
+
+// clang-format off
+#define LAYOUT_charybdis_3x5(                           \
+  k00, k01, k02, k03, k04,     k44, k43, k42, k41, k40, \
+  k10, k11, k12, k13, k14,     k54, k53, k52, k51, k50, \
+  k20, k21, k22, k23, k24,     k64, k63, k62, k61, k60, \
+            k32, k33, k30,     k70, k72                 \
+)                                                       \
+{                                                       \
+  {   k00,   k01,   k02,   k03,   k04 },                \
+  {   k10,   k11,   k12,   k13,   k14 },                \
+  {   k20,   k21,   k22,   k23,   k24 },                \
+  {   k30, KC_NO,   k32,   k33, KC_NO },                \
+  {   k40,   k41,   k42,   k43,   k44 },                \
+  {   k50,   k51,   k52,   k53,   k54 },                \
+  {   k60,   k61,   k62,   k63,   k64 },                \
+  {   k70, KC_NO,   k72, KC_NO, KC_NO },                \
+}
+
+/**
+ * \brief Compatibility layout with the split_3x5_3 community layout.
+ *
+ * This effectively renders the Charbdis Nano compatible with existing layout
+ * implementations relying on the `split_3x5_3` layout, which includes, among
+ * others, Manna-Harbour's (@manna_harbour) Miryoku layout.
+ *
+ * The last key on the layout is ignored, to transform the input 36-keys layout
+ * into the Charybdis Nano's 35-keys layout.
+ */
+#define LAYOUT_split_3x5_3(                             \
+  k00, k01, k02, k03, k04,     k44, k43, k42, k41, k40, \
+  k10, k11, k12, k13, k14,     k54, k53, k52, k51, k50, \
+  k20, k21, k22, k23, k24,     k64, k63, k62, k61, k60, \
+            k32, k33, k30,     k70, k72, ___            \
+)                                                       \
+{                                                       \
+  {   k00,   k01,   k02,   k03,   k04 },                \
+  {   k10,   k11,   k12,   k13,   k14 },                \
+  {   k20,   k21,   k22,   k23,   k24 },                \
+  {   k30, KC_NO,   k32,   k33, KC_NO },                \
+  {   k40,   k41,   k42,   k43,   k44 },                \
+  {   k50,   k51,   k52,   k53,   k54 },                \
+  {   k60,   k61,   k62,   k63,   k64 },                \
+  {   k70, KC_NO,   k72, KC_NO, KC_NO },                \
+}
+// clang-format on
diff --git a/keyboards/bastardkb/charybdis/3x5/config.h b/keyboards/bastardkb/charybdis/3x5/config.h
new file mode 100644
index 0000000000..9c69f7c358
--- /dev/null
+++ b/keyboards/bastardkb/charybdis/3x5/config.h
@@ -0,0 +1,87 @@
+/*
+ * Copyright 2021 Quentin LEBASTARD <qlebastard@gmail.com>
+ * Copyright 2021 Charly Delay <charly@codesink.dev> (@0xcharly)
+ *
+ * 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
+
+#define VENDOR_ID 0xA8F8
+#define PRODUCT_ID 0x1832
+#define DEVICE_VER 0x0001
+#define MANUFACTURER Bastard Keyboards
+#define PRODUCT Charybdis Nano
+
+/* Key matrix configuration. */
+
+// Rows are doubled-up.
+#define MATRIX_ROWS 8
+#define MATRIX_COLS 5
+
+// Wiring configuration for each half.
+#define MATRIX_ROW_PINS \
+    { B7, C6, D4, B5 }
+#define MATRIX_COL_PINS \
+    { C7, F0, D7, E6, B4 }
+
+#define MATRIX_ROW_PINS_RIGHT \
+    { F0, C6, D4, B5 }
+#define MATRIX_COL_PINS_RIGHT \
+    { C7, B7, D7, E6, B4 }
+
+#define DIODE_DIRECTION ROW2COL
+
+/* Handedness. */
+#define MASTER_RIGHT
+
+/* Bootmagic Lite configuration. */
+#define BOOTMAGIC_LITE_ROW 0
+#define BOOTMAGIC_LITE_COLUMN 0
+#define BOOTMAGIC_LITE_ROW_RIGHT 4
+#define BOOTMAGIC_LITE_COLUMN_RIGHT 0
+
+/* serial.c configuration (for split keyboard) */
+#define SOFT_SERIAL_PIN D2
+
+/* Set 0 if debouncing isn't needed. */
+#define DEBOUNCE 5
+
+/* Disable action features. */
+#define NO_ACTION_MACRO     // Disable old-style macro handling.
+#define NO_ACTION_FUNCTION  // Disable old-style function handling.
+
+/* PMW3360 settings. */
+#define PMW3360_CS_PIN B0
+
+// Trackball angle adjustment.
+#define ROTATIONAL_TRANSFORM_ANGLE -25
+
+/* RGB settings. */
+
+#define RGB_DI_PIN D3
+#define RGBLED_NUM 35
+#define RGBLED_SPLIT \
+    { 18, 17 }
+
+/* RGB matrix support. */
+#ifdef RGB_MATRIX_ENABLE
+#    define SPLIT_TRANSPORT_MIRROR
+#    define DRIVER_LED_TOTAL RGBLED_NUM
+#    define RGB_MATRIX_SPLIT RGBLED_SPLIT
+#    define RGB_MATRIX_MAXIMUM_BRIGHTNESS 50
+#    define RGB_MATRIX_STARTUP_VAL RGB_MATRIX_MAXIMUM_BRIGHTNESS
+#    define RGB_DISABLE_WHEN_USB_SUSPENDED
+#    define RGB_MATRIX_KEYPRESSES
+#endif
diff --git a/keyboards/bastardkb/charybdis/3x5/info.json b/keyboards/bastardkb/charybdis/3x5/info.json
new file mode 100644
index 0000000000..03fb05664f
--- /dev/null
+++ b/keyboards/bastardkb/charybdis/3x5/info.json
@@ -0,0 +1,86 @@
+{
+    "keyboard_name": "Charybdis Nano",
+    "url": "https://www.bastardkb.com",
+    "maintainer": "Quentin Lebastard",
+    "layouts": {
+        "LAYOUT_charybdis_3x5": {
+            "layout": [
+                { "label": "L00", "x": 0, "y": 0 },
+                { "label": "L01", "x": 1, "y": 0 },
+                { "label": "L02", "x": 2, "y": 0 },
+                { "label": "L03", "x": 3, "y": 0 },
+                { "label": "L04", "x": 4, "y": 0 },
+                { "label": "R00", "x": 11, "y": 0 },
+                { "label": "R01", "x": 12, "y": 0 },
+                { "label": "R02", "x": 13, "y": 0 },
+                { "label": "R03", "x": 14, "y": 0 },
+                { "label": "R04", "x": 15, "y": 0 },
+                { "label": "L10", "x": 0, "y": 1 },
+                { "label": "L11", "x": 1, "y": 1 },
+                { "label": "L12", "x": 2, "y": 1 },
+                { "label": "L13", "x": 3, "y": 1 },
+                { "label": "L14", "x": 4, "y": 1 },
+                { "label": "R10", "x": 11, "y": 1 },
+                { "label": "R11", "x": 12, "y": 1 },
+                { "label": "R12", "x": 13, "y": 1 },
+                { "label": "R13", "x": 14, "y": 1 },
+                { "label": "R14", "x": 15, "y": 1 },
+                { "label": "L20", "x": 0, "y": 2 },
+                { "label": "L21", "x": 1, "y": 2 },
+                { "label": "L22", "x": 2, "y": 2 },
+                { "label": "L23", "x": 3, "y": 2 },
+                { "label": "L24", "x": 4, "y": 2 },
+                { "label": "R20", "x": 11, "y": 2 },
+                { "label": "R21", "x": 12, "y": 2 },
+                { "label": "R22", "x": 13, "y": 2 },
+                { "label": "R23", "x": 14, "y": 2 },
+                { "label": "R24", "x": 15, "y": 2 },
+                { "label": "L30", "x": 4, "y": 3 },
+                { "label": "L31", "x": 5, "y": 3 },
+                { "label": "L32", "x": 6, "y": 3 },
+                { "label": "R30", "x": 9, "y": 3 },
+                { "label": "R31", "x": 10, "y": 3 }
+            ]
+        },
+        "LAYOUT_split_3x5_3": {
+            "layout": [
+                { "label": "L00", "x": 0, "y": 0 },
+                { "label": "L01", "x": 1, "y": 0 },
+                { "label": "L02", "x": 2, "y": 0 },
+                { "label": "L03", "x": 3, "y": 0 },
+                { "label": "L04", "x": 4, "y": 0 },
+                { "label": "R00", "x": 11, "y": 0 },
+                { "label": "R01", "x": 12, "y": 0 },
+                { "label": "R02", "x": 13, "y": 0 },
+                { "label": "R03", "x": 14, "y": 0 },
+                { "label": "R04", "x": 15, "y": 0 },
+                { "label": "L10", "x": 0, "y": 1 },
+                { "label": "L11", "x": 1, "y": 1 },
+                { "label": "L12", "x": 2, "y": 1 },
+                { "label": "L13", "x": 3, "y": 1 },
+                { "label": "L14", "x": 4, "y": 1 },
+                { "label": "R10", "x": 11, "y": 1 },
+                { "label": "R11", "x": 12, "y": 1 },
+                { "label": "R12", "x": 13, "y": 1 },
+                { "label": "R13", "x": 14, "y": 1 },
+                { "label": "R14", "x": 15, "y": 1 },
+                { "label": "L20", "x": 0, "y": 2 },
+                { "label": "L21", "x": 1, "y": 2 },
+                { "label": "L22", "x": 2, "y": 2 },
+                { "label": "L23", "x": 3, "y": 2 },
+                { "label": "L24", "x": 4, "y": 2 },
+                { "label": "R20", "x": 11, "y": 2 },
+                { "label": "R21", "x": 12, "y": 2 },
+                { "label": "R22", "x": 13, "y": 2 },
+                { "label": "R23", "x": 14, "y": 2 },
+                { "label": "R24", "x": 15, "y": 2 },
+                { "label": "L30", "x": 4, "y": 3 },
+                { "label": "L31", "x": 5, "y": 3 },
+                { "label": "L32", "x": 6, "y": 3 },
+                { "label": "R30", "x": 9, "y": 3 },
+                { "label": "R31", "x": 10, "y": 3 },
+                { "label": "R32", "x": 11, "y": 3 }
+            ]
+        }
+    }
+}
diff --git a/keyboards/bastardkb/charybdis/3x5/keymaps/default/config.h b/keyboards/bastardkb/charybdis/3x5/keymaps/default/config.h
new file mode 100644
index 0000000000..f2dd86c653
--- /dev/null
+++ b/keyboards/bastardkb/charybdis/3x5/keymaps/default/config.h
@@ -0,0 +1,54 @@
+/**
+ * Copyright 2021 Charly Delay <charly@codesink.dev> (@0xcharly)
+ *
+ * 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
+
+#ifndef TAPPING_TERM
+/**
+ * \brief Configure the global tapping term (default: 200ms).
+ *
+ * If you have a lot of accidental mod activations, crank up the tapping term.
+ *
+ * See docs.qmk.fm/using-qmk/software-features/tap_hold#tapping-term
+ */
+#    define TAPPING_TERM 200
+#endif  // TAPPING_TERM
+
+/* RGB Matrix. */
+
+#ifdef RGB_MATRIX_ENABLE
+// Disable control of RGB matrix by keycodes (must use firmware implementation
+// to control the feature).
+#    define RGB_MATRIX_DISABLE_KEYCODES
+
+// Limit maximum brightness to keep power consumption reasonable, and avoid
+// disconnects.
+#    undef RGB_MATRIX_MAXIMUM_BRIGHTNESS
+#    define RGB_MATRIX_MAXIMUM_BRIGHTNESS 64
+
+// Rainbow swirl as startup mode.
+#    define ENABLE_RGB_MATRIX_CYCLE_LEFT_RIGHT
+#    define RGB_MATRIX_STARTUP_MODE RGB_MATRIX_CYCLE_LEFT_RIGHT
+
+// Slow swirl at startup.
+#    define RGB_MATRIX_STARTUP_SPD 32
+
+// Startup values.
+#    define RGB_MATRIX_STARTUP_HUE 0
+#    define RGB_MATRIX_STARTUP_SAT 255
+#    define RGB_MATRIX_STARTUP_VAL RGB_MATRIX_MAXIMUM_BRIGHTNESS
+#    define RGB_MATRIX_STARTUP_HSV RGB_MATRIX_STARTUP_HUE, RGB_MATRIX_STARTUP_SAT, RGB_MATRIX_STARTUP_VAL
+#endif  // RGB_MATRIX_ENABLE
diff --git a/keyboards/bastardkb/charybdis/3x5/keymaps/default/keymap.c b/keyboards/bastardkb/charybdis/3x5/keymaps/default/keymap.c
new file mode 100644
index 0000000000..18fe860527
--- /dev/null
+++ b/keyboards/bastardkb/charybdis/3x5/keymaps/default/keymap.c
@@ -0,0 +1,70 @@
+/**
+ * Copyright 2021 Charly Delay <charly@codesink.dev> (@0xcharly)
+ *
+ * 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
+
+enum charybdis_keymap_layers {
+    LAYER_BASE = 0,
+    LAYER_LOWER,
+    LAYER_RAISE,
+};
+
+#define LOWER MO(LAYER_LOWER)
+#define RAISE MO(LAYER_RAISE)
+
+#define CTL_BSP CTL_T(KC_BSPC)
+#define SFT_SPC SFT_T(KC_SPC)
+#define GUI_ENT GUI_T(KC_ENT)
+
+// clang-format off
+const uint16_t PROGMEM keymaps[][MATRIX_ROWS][MATRIX_COLS] = {
+  [LAYER_BASE] = LAYOUT_charybdis_3x5(
+  // ╭─────────────────────────────────────────────╮ ╭─────────────────────────────────────────────╮
+          KC_Q,    KC_W,    KC_E,    KC_R,    KC_T,       KC_Y,    KC_U,    KC_I,    KC_O,    KC_P,
+  // ├─────────────────────────────────────────────┤ ├─────────────────────────────────────────────┤
+          KC_A,    KC_S,    KC_D,    KC_F,    KC_G,       KC_H,    KC_J,    KC_K,    KC_L, KC_SCLN,
+  // ├─────────────────────────────────────────────┤ ├─────────────────────────────────────────────┤
+          KC_Z,    KC_X,    KC_C,    KC_V,    KC_B,       KC_N,    KC_M, KC_COMM,  KC_DOT, KC_SLSH,
+  // ╰─────────────────────────────────────────────┤ ├─────────────────────────────────────────────╯
+                         CTL_BSP, SFT_SPC,   LOWER,      RAISE, GUI_ENT
+  //                   ╰───────────────────────────╯ ╰──────────────────╯
+  ),
+
+  [LAYER_LOWER] = LAYOUT_charybdis_3x5(
+  // ╭─────────────────────────────────────────────╮ ╭─────────────────────────────────────────────╮
+       RGB_TOG, KC_MNXT, KC_MPLY, KC_MPRV, XXXXXXX,    KC_LBRC,    KC_7,    KC_8,    KC_9, KC_RBRC,
+  // ├─────────────────────────────────────────────┤ ├─────────────────────────────────────────────┤
+       KC_LGUI, KC_LALT, KC_LCTL, KC_LSFT, XXXXXXX,    KC_PPLS,    KC_4,    KC_5,    KC_6, KC_PMNS,
+  // ├─────────────────────────────────────────────┤ ├─────────────────────────────────────────────┤
+       XXXXXXX, XXXXXXX, XXXXXXX, EEP_RST,   RESET,    KC_PAST,    KC_1,    KC_2,    KC_3, KC_PSLS,
+  // ╰─────────────────────────────────────────────┤ ├─────────────────────────────────────────────╯
+                         XXXXXXX, XXXXXXX, _______,    XXXXXXX, _______
+  //                   ╰───────────────────────────╯ ╰──────────────────╯
+  ),
+
+  [LAYER_RAISE] = LAYOUT_charybdis_3x5(
+  // ╭─────────────────────────────────────────────╮ ╭─────────────────────────────────────────────╮
+       XXXXXXX, XXXXXXX, XXXXXXX, XXXXXXX, XXXXXXX,    XXXXXXX, KC_VOLU, KC_MUTE, KC_VOLD, XXXXXXX,
+  // ├─────────────────────────────────────────────┤ ├─────────────────────────────────────────────┤
+       KC_LEFT,   KC_UP, KC_DOWN, KC_RGHT, XXXXXXX,    XXXXXXX, KC_RSFT, KC_RCTL, KC_RALT, KC_RGUI,
+  // ├─────────────────────────────────────────────┤ ├─────────────────────────────────────────────┤
+       KC_HOME, KC_PGUP, KC_PGDN,  KC_END, XXXXXXX,      RESET, EEP_RST, XXXXXXX, XXXXXXX, XXXXXXX,
+  // ╰─────────────────────────────────────────────┤ ├─────────────────────────────────────────────╯
+                         _______, _______, XXXXXXX,    _______, XXXXXXX
+  //                   ╰───────────────────────────╯ ╰──────────────────╯
+  ),
+};
+// clang-format on
diff --git a/keyboards/bastardkb/charybdis/3x5/keymaps/default/readme.md b/keyboards/bastardkb/charybdis/3x5/keymaps/default/readme.md
new file mode 100644
index 0000000000..3908656820
--- /dev/null
+++ b/keyboards/bastardkb/charybdis/3x5/keymaps/default/readme.md
@@ -0,0 +1,7 @@
+# Charybdis (3x5) default keymap
+
+> :bulb: Have a look at the [`via` keymap](../via) for a more feature-rich layout.
+
+The Charydbis (3x5) default keymap is inspired from the original [Dactyl Manuform](../../../../../handwired/dactyl_manuform) default keymap.
+
+This layout supports RGB matrix. However, due to space constraints on the MCU, only a limited number of effect can be enabled at once. Look at the `config.h` file and enable your favorite effect.
diff --git a/keyboards/bastardkb/charybdis/3x5/keymaps/via/config.h b/keyboards/bastardkb/charybdis/3x5/keymaps/via/config.h
new file mode 100644
index 0000000000..f515d85334
--- /dev/null
+++ b/keyboards/bastardkb/charybdis/3x5/keymaps/via/config.h
@@ -0,0 +1,118 @@
+/**
+ * Copyright 2021 Charly Delay <charly@codesink.dev> (@0xcharly)
+ *
+ * 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
+
+#ifdef VIA_ENABLE
+/* VIA configuration. */
+#    define DYNAMIC_KEYMAP_LAYER_COUNT 7
+#endif  // VIA_ENABLE
+
+/* Disable unused features. */
+#define NO_ACTION_ONESHOT
+
+#ifndef TAPPING_TERM
+/**
+ * \brief Configure the global tapping term (default: 200ms).
+ *
+ * If you have a lot of accidental mod activations, crank up the tapping term.
+ *
+ * See docs.qmk.fm/using-qmk/software-features/tap_hold#tapping-term
+ */
+#    define TAPPING_TERM 200
+#endif  // TAPPING_TERM
+
+/**
+ * \brief Enable rapid switch from tap to hold.
+ *
+ * Note that a side-effect of this setting is to disable auto-repeat when
+ * pressing key twice, except for one-shot keys.
+ *
+ * See docs.qmk.fm/using-qmk/software-features/tap_hold#tapping-force-hold
+ */
+#define TAPPING_FORCE_HOLD
+
+/*
+ * Tap-or-Hold decision modes.
+ *
+ * Note that the following flags behave differently when combined (ie. when 2 or
+ * more are enabled).
+ *
+ * See bit.ly/tap-or-hold for a visual explanation of the following tap-or-hold
+ * decision modes.
+ */
+
+/**
+ * \brief Faster tap-hold trigger.
+ *
+ * Without `PERMISSIVE_HOLD`, within `TAPPING_TERM`:
+ *   Mod(a)🠗 e🠗 e🠕 Mod(a)🠕 ➞ ae
+ * With `PERMISSIVE_HOLD`, within `TAPPING_TERM`:
+ *   Mod(a)🠗 e🠗 e🠕 Mod(a)🠕 ➞ Mod+e
+ *
+ * See docs.qmk.fm/using-qmk/software-features/tap_hold#permissive-hold
+ */
+#define PERMISSIVE_HOLD
+
+/**
+ * \brief Prevent normal rollover on alphas from accidentally triggering mods.
+ *
+ * Ignores key presses that interrupt a mod-tap.  Must-have for Home Row mod.
+ *
+ * Without `IGNORE_MOD_TAP_INTERRUPT`, within `TAPPING_TERM`:
+ *   Mod(a)🠗 e🠗 Mod(a)🠕 e🠕 ➞ Mod+e
+ * With `IGNORE_MOD_TAP_INTERRUPT`, within `TAPPING_TERM`:
+ *   Mod(a)🠗 e🠗 Mod(a)🠕 e🠕 ➞ ae
+ *
+ * See docs.qmk.fm/using-qmk/software-features/tap_hold#ignore-mod-tap-interrupt
+ */
+#define IGNORE_MOD_TAP_INTERRUPT
+
+/* Charybdis-specific features. */
+
+#ifdef POINTING_DEVICE_ENABLE
+// Enable pointer acceleration, which increases the speed by ~2x for large
+// displacement, while maintaining 1x speed for slow movements.  See also:
+// - `CHARYBDIS_POINTER_ACCELERATION_FACTOR`
+#    define CHARYBDIS_POINTER_ACCELERATION_ENABLE
+
+// Automatically enable the pointer layer when moving the trackball.  See also:
+// - `CHARYBDIS_AUTO_POINTER_LAYER_TRIGGER_TIMEOUT_MS`
+// - `CHARYBDIS_AUTO_POINTER_LAYER_TRIGGER_THRESHOLD`
+// #define CHARYBDIS_AUTO_POINTER_LAYER_TRIGGER_ENABLE
+#endif  // POINTING_DEVICE_ENABLE
+
+/* RGB Matrix. */
+
+#ifdef RGB_MATRIX_ENABLE
+// Limit maximum brightness to keep power consumption reasonable, and avoid
+// disconnects.
+#    undef RGB_MATRIX_MAXIMUM_BRIGHTNESS
+#    define RGB_MATRIX_MAXIMUM_BRIGHTNESS 64
+
+// Rainbow swirl as startup mode.
+#    define ENABLE_RGB_MATRIX_CYCLE_LEFT_RIGHT
+#    define RGB_MATRIX_STARTUP_MODE RGB_MATRIX_CYCLE_LEFT_RIGHT
+
+// Slow swirl at startup.
+#    define RGB_MATRIX_STARTUP_SPD 32
+
+// Startup values.
+#    define RGB_MATRIX_STARTUP_HUE 0
+#    define RGB_MATRIX_STARTUP_SAT 255
+#    define RGB_MATRIX_STARTUP_VAL RGB_MATRIX_MAXIMUM_BRIGHTNESS
+#    define RGB_MATRIX_STARTUP_HSV RGB_MATRIX_STARTUP_HUE, RGB_MATRIX_STARTUP_SAT, RGB_MATRIX_STARTUP_VAL
+#endif  // RGB_MATRIX_ENABLE
diff --git a/keyboards/bastardkb/charybdis/3x5/keymaps/via/keymap.c b/keyboards/bastardkb/charybdis/3x5/keymaps/via/keymap.c
new file mode 100644
index 0000000000..ba549deecf
--- /dev/null
+++ b/keyboards/bastardkb/charybdis/3x5/keymaps/via/keymap.c
@@ -0,0 +1,263 @@
+/**
+ * Copyright 2021 Charly Delay <charly@codesink.dev> (@0xcharly)
+ *
+ * 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
+
+#ifdef CHARYBDIS_AUTO_POINTER_LAYER_TRIGGER_ENABLE
+#    include "timer.h"
+#endif  // CHARYBDIS_AUTO_POINTER_LAYER_TRIGGER_ENABLE
+
+enum charybdis_keymap_layers {
+    LAYER_BASE = 0,
+    LAYER_FUNCTION,
+    LAYER_NAVIGATION,
+    LAYER_MEDIA,
+    LAYER_POINTER,
+    LAYER_NUMERAL,
+    LAYER_SYMBOLS,
+};
+
+// Automatically enable sniping-mode on the pointer layer.
+#define CHARYBDIS_AUTO_SNIPING_ON_LAYER LAYER_POINTER
+
+#ifdef CHARYBDIS_AUTO_POINTER_LAYER_TRIGGER_ENABLE
+static uint16_t auto_pointer_layer_timer = 0;
+
+#    ifndef CHARYBDIS_AUTO_POINTER_LAYER_TRIGGER_TIMEOUT_MS
+#        define CHARYBDIS_AUTO_POINTER_LAYER_TRIGGER_TIMEOUT_MS 1000
+#    endif  // CHARYBDIS_AUTO_POINTER_LAYER_TRIGGER_TIMEOUT_MS
+
+#    ifndef CHARYBDIS_AUTO_POINTER_LAYER_TRIGGER_THRESHOLD
+#        define CHARYBDIS_AUTO_POINTER_LAYER_TRIGGER_THRESHOLD 8
+#    endif  // CHARYBDIS_AUTO_POINTER_LAYER_TRIGGER_THRESHOLD
+#endif      // CHARYBDIS_AUTO_POINTER_LAYER_TRIGGER_ENABLE
+
+#define ESC_MED LT(LAYER_MEDIA, KC_ESC)
+#define SPC_NAV LT(LAYER_NAVIGATION, KC_SPC)
+#define TAB_FUN LT(LAYER_FUNCTION, KC_TAB)
+#define ENT_SYM LT(LAYER_SYMBOLS, KC_ENT)
+#define BSP_NUM LT(LAYER_NUMERAL, KC_BSPC)
+#define _L_PTR(KC) LT(LAYER_POINTER, KC)
+
+// clang-format off
+/** \brief QWERTY layout (3 rows, 10 columns). */
+#define LAYOUT_LAYER_BASE                                                                     \
+       KC_Q,    KC_W,    KC_E,    KC_R,    KC_T,    KC_Y,    KC_U,    KC_I,    KC_O,    KC_P, \
+       KC_A,    KC_S,    KC_D,    KC_F,    KC_G,    KC_H,    KC_J,    KC_K,    KC_L, KC_QUOT, \
+       KC_Z,    KC_X,    KC_C,    KC_V,    KC_B,    KC_N,    KC_M, KC_COMM,  KC_DOT, KC_SLSH, \
+                      ESC_MED, SPC_NAV, TAB_FUN, ENT_SYM, BSP_NUM
+
+/** Convenience row shorthands. */
+#define _______________DEAD_HALF_ROW_______________ XXXXXXX, XXXXXXX, XXXXXXX, XXXXXXX, XXXXXXX
+#define ______________HOME_ROW_GACS_L______________ KC_LGUI, KC_LALT, KC_LCTL, KC_LSFT, XXXXXXX
+#define ______________HOME_ROW_GACS_R______________ XXXXXXX, KC_LSFT, KC_LCTL, KC_LALT, KC_LGUI
+
+/*
+ * Layers used on the Charybdis Nano.
+ *
+ * These layers started off heavily inspired by the Miryoku layout, but trimmed
+ * down and tailored for a stock experience that is meant to be fundation for
+ * further personalization.
+ *
+ * See https://github.com/manna-harbour/miryoku for the original layout.
+ */
+
+/**
+ * \brief Function layer.
+ *
+ * Secondary right-hand layer has function keys mirroring the numerals on the
+ * primary layer with extras on the pinkie column, plus system keys on the inner
+ * column. App is on the tertiary thumb key and other thumb keys are duplicated
+ * from the base layer to enable auto-repeat.
+ */
+#define LAYOUT_LAYER_FUNCTION                                                                 \
+    _______________DEAD_HALF_ROW_______________, KC_PSCR,   KC_F7,   KC_F8,   KC_F9,  KC_F12, \
+    ______________HOME_ROW_GACS_L______________, KC_SLCK,   KC_F4,   KC_F5,   KC_F6,  KC_F11, \
+    _______________DEAD_HALF_ROW_______________, KC_PAUS,   KC_F1,   KC_F2,   KC_F3,  KC_F10, \
+                      XXXXXXX, XXXXXXX, _______, XXXXXXX, XXXXXXX
+
+/**
+ * \brief Media layer.
+ *
+ * Tertiary left- and right-hand layer is media and RGB control.  This layer is
+ * symmetrical to accomodate the left- and right-hand trackball.
+ */
+#define LAYOUT_LAYER_MEDIA                                                                    \
+    XXXXXXX,RGB_RMOD, RGB_TOG, RGB_MOD, XXXXXXX, XXXXXXX,RGB_RMOD, RGB_TOG, RGB_MOD, XXXXXXX, \
+    KC_MPRV, KC_VOLD, KC_MUTE, KC_VOLU, KC_MNXT, KC_MPRV, KC_VOLD, KC_MUTE, KC_VOLU, KC_MNXT, \
+    XXXXXXX, XXXXXXX, XXXXXXX, EEP_RST,   RESET,   RESET, EEP_RST, XXXXXXX, XXXXXXX, XXXXXXX, \
+                      _______, KC_MPLY, KC_MSTP, KC_MSTP, KC_MPLY
+
+/** \brief Mouse emulation and pointer functions. */
+#define LAYOUT_LAYER_POINTER                                                                  \
+    XXXXXXX, XXXXXXX, XXXXXXX, DPI_MOD, S_D_MOD, S_D_MOD, DPI_MOD, XXXXXXX, XXXXXXX, XXXXXXX, \
+    ______________HOME_ROW_GACS_L______________, ______________HOME_ROW_GACS_R______________, \
+    _______, DRGSCRL, SNIPING, EEP_RST,   RESET,   RESET, EEP_RST, SNIPING, DRGSCRL, _______, \
+                      KC_BTN2, KC_BTN1, KC_BTN3, KC_BTN3, KC_BTN1
+
+/**
+ * \brief Navigation layer.
+ *
+ * Primary right-hand layer (left home thumb) is navigation and editing. Cursor
+ * keys are on the home position, line and page movement below, clipboard above,
+ * caps lock and insert on the inner column. Thumb keys are duplicated from the
+ * base layer to avoid having to layer change mid edit and to enable auto-repeat.
+ */
+#define LAYOUT_LAYER_NAVIGATION                                                               \
+    _______________DEAD_HALF_ROW_______________, _______________DEAD_HALF_ROW_______________, \
+    ______________HOME_ROW_GACS_L______________, KC_CLCK, KC_LEFT, KC_DOWN,   KC_UP, KC_RGHT, \
+    _______________DEAD_HALF_ROW_______________,  KC_INS, KC_HOME, KC_PGDN, KC_PGUP,  KC_END, \
+                      XXXXXXX, _______, XXXXXXX,  KC_ENT, KC_BSPC
+
+/**
+ * \brief Numeral layout.
+ *
+ * Primary left-hand layer (right home thumb) is numerals and symbols. Numerals
+ * are in the standard numpad locations with symbols in the remaining positions.
+ * `KC_DOT` is duplicated from the base layer.
+ */
+#define LAYOUT_LAYER_NUMERAL                                                                  \
+    KC_LBRC,    KC_7,    KC_8,    KC_9, KC_RBRC, _______________DEAD_HALF_ROW_______________, \
+    KC_SCLN,    KC_4,    KC_5,    KC_6,  KC_EQL, ______________HOME_ROW_GACS_R______________, \
+     KC_GRV,    KC_1,    KC_2,    KC_3, KC_BSLS, _______________DEAD_HALF_ROW_______________, \
+                       KC_DOT,    KC_0, KC_MINS, XXXXXXX, _______
+
+/**
+ * \brief Symbols layer.
+ *
+ * Secondary left-hand layer has shifted symbols in the same locations to reduce
+ * chording when using mods with shifted symbols. `KC_LPRN` is duplicated next to
+ * `KC_RPRN`.
+ */
+#define LAYOUT_LAYER_SYMBOLS                                                                  \
+    KC_LCBR, KC_AMPR, KC_ASTR, KC_LPRN, KC_RCBR, _______________DEAD_HALF_ROW_______________, \
+    KC_COLN,  KC_DLR, KC_PERC, KC_CIRC, KC_PLUS, ______________HOME_ROW_GACS_R______________, \
+    KC_TILD, KC_EXLM,   KC_AT, KC_HASH, KC_PIPE, _______________DEAD_HALF_ROW_______________, \
+                      KC_LPRN, KC_RPRN, KC_UNDS, _______, XXXXXXX
+
+/**
+ * \brief Add Home Row mod to a layout.
+ *
+ * Expects a 10-key per row layout.  Adds support for GACS (Gui, Alt, Ctl, Shift)
+ * home row.  The layout passed in parameter must contain at least 20 keycodes.
+ *
+ * This is meant to be used with `LAYER_ALPHAS_QWERTY` defined above, eg.:
+ *
+ *     HOME_ROW_MOD_GACS(LAYER_ALPHAS_QWERTY)
+ */
+#define _HOME_ROW_MOD_GACS(                                            \
+    L00, L01, L02, L03, L04, R05, R06, R07, R08, R09,                  \
+    L10, L11, L12, L13, L14, R15, R16, R17, R18, R19,                  \
+    ...)                                                               \
+             L00,         L01,         L02,         L03,         L04,  \
+             R05,         R06,         R07,         R08,         R09,  \
+      LGUI_T(L10), LALT_T(L11), LCTL_T(L12), LSFT_T(L13),        L14,  \
+             R15,  RSFT_T(R16), RCTL_T(R17), LALT_T(R18), RGUI_T(R19), \
+      __VA_ARGS__
+#define HOME_ROW_MOD_GACS(...) _HOME_ROW_MOD_GACS(__VA_ARGS__)
+
+/**
+ * \brief Add pointer layer keys to a layout.
+ *
+ * Expects a 10-key per row layout.  The layout passed in parameter must contain
+ * at least 30 keycodes.
+ *
+ * This is meant to be used with `LAYER_ALPHAS_QWERTY` defined above, eg.:
+ *
+ *     POINTER_MOD(LAYER_ALPHAS_QWERTY)
+ */
+#define _POINTER_MOD(                                                  \
+    L00, L01, L02, L03, L04, R05, R06, R07, R08, R09,                  \
+    L10, L11, L12, L13, L14, R15, R16, R17, R18, R19,                  \
+    L20, L21, L22, L23, L24, R25, R26, R27, R28, R29,                  \
+    ...)                                                               \
+             L00,         L01,         L02,         L03,         L04,  \
+             R05,         R06,         R07,         R08,         R09,  \
+             L10,         L11,         L12,         L13,         L14,  \
+             R15,         R16,         R17,         R18,         R19,  \
+      _L_PTR(L20),        L21,         L22,         L23,         L24,  \
+             R25,         R26,         R27,         R28,  _L_PTR(R29), \
+      __VA_ARGS__
+#define POINTER_MOD(...) _POINTER_MOD(__VA_ARGS__)
+
+#define LAYOUT_wrapper(...) LAYOUT_charybdis_3x5(__VA_ARGS__)
+
+const uint16_t PROGMEM keymaps[][MATRIX_ROWS][MATRIX_COLS] = {
+  [LAYER_BASE] = LAYOUT_wrapper(
+    POINTER_MOD(HOME_ROW_MOD_GACS(LAYOUT_LAYER_BASE))
+  ),
+  [LAYER_FUNCTION] = LAYOUT_wrapper(LAYOUT_LAYER_FUNCTION),
+  [LAYER_NAVIGATION] = LAYOUT_wrapper(LAYOUT_LAYER_NAVIGATION),
+  [LAYER_MEDIA] = LAYOUT_wrapper(LAYOUT_LAYER_MEDIA),
+  [LAYER_NUMERAL] = LAYOUT_wrapper(LAYOUT_LAYER_NUMERAL),
+  [LAYER_POINTER] = LAYOUT_wrapper(LAYOUT_LAYER_POINTER),
+  [LAYER_SYMBOLS] = LAYOUT_wrapper(LAYOUT_LAYER_SYMBOLS),
+};
+// clang-format on
+
+#ifdef POINTING_DEVICE_ENABLE
+#    ifdef CHARYBDIS_AUTO_POINTER_LAYER_TRIGGER_ENABLE
+report_mouse_t pointing_device_task_user(report_mouse_t mouse_report) {
+    if (abs(mouse_report.x) > CHARYBDIS_AUTO_POINTER_LAYER_TRIGGER_THRESHOLD || abs(mouse_report.y) > CHARYBDIS_AUTO_POINTER_LAYER_TRIGGER_THRESHOLD) {
+        if (auto_pointer_layer_timer == 0) {
+            layer_on(LAYER_POINTER);
+#        ifdef RGB_MATRIX_ENABLE
+            rgb_matrix_mode_noeeprom(RGB_MATRIX_NONE);
+            rgb_matrix_sethsv_noeeprom(HSV_GREEN);
+#        endif  // RGB_MATRIX_ENABLE
+        }
+        auto_pointer_layer_timer = timer_read();
+    }
+    return mouse_report;
+}
+
+void matrix_scan_kb(void) {
+    if (auto_pointer_layer_timer != 0 && TIMER_DIFF_16(timer_read(), auto_pointer_layer_timer) >= CHARYBDIS_AUTO_POINTER_LAYER_TRIGGER_TIMEOUT_MS) {
+        auto_pointer_layer_timer = 0;
+        layer_off(LAYER_POINTER);
+#        ifdef RGB_MATRIX_ENABLE
+        rgb_matrix_mode_noeeprom(RGB_MATRIX_STARTUP_MODE);
+#        endif  // RGB_MATRIX_ENABLE
+    }
+    matrix_scan_user();
+}
+#    endif  // CHARYBDIS_AUTO_POINTER_LAYER_TRIGGER_ENABLE
+
+#    ifdef CHARYBDIS_AUTO_SNIPING_ON_LAYER
+layer_state_t layer_state_set_kb(layer_state_t state) {
+    state = layer_state_set_user(state);
+    charybdis_set_pointer_sniping_enabled(layer_state_cmp(state, CHARYBDIS_AUTO_SNIPING_ON_LAYER));
+    return state;
+}
+#    endif  // CHARYBDIS_AUTO_SNIPING_ON_LAYER
+#endif      // POINTING_DEVICE_ENABLE
+
+#ifdef RGB_MATRIX_ENABLE
+// Forward-declare this helper function since it is defined in rgb_matrix.c.
+void rgb_matrix_update_pwm_buffers(void);
+#endif
+
+void shutdown_user(void) {
+#ifdef RGBLIGHT_ENABLE
+    rgblight_enable_noeeprom();
+    rgblight_mode_noeeprom(RGBLIGHT_MODE_STATIC_LIGHT);
+    rgblight_setrgb_red();
+#endif  // RGBLIGHT_ENABLE
+#ifdef RGB_MATRIX_ENABLE
+    rgb_matrix_set_color_all(RGB_RED);
+    rgb_matrix_update_pwm_buffers();
+#endif  // RGB_MATRIX_ENABLE
+}
diff --git a/keyboards/bastardkb/charybdis/3x5/keymaps/via/readme.md b/keyboards/bastardkb/charybdis/3x5/keymaps/via/readme.md
new file mode 100644
index 0000000000..dc7f6f2d30
--- /dev/null
+++ b/keyboards/bastardkb/charybdis/3x5/keymaps/via/readme.md
@@ -0,0 +1,63 @@
+# Charybdis (3x5) `via` keymap
+
+The Charydbis (3x5) `via` keymap is based on a QWERTY layout with [home row mods](https://precondition.github.io/home-row-mods) and [Miryoku-inspired layers](https://github.com/manna-harbour/miryoku), and some features and changes specific to the Charybdis.
+
+This layout supports RGB matrix. However, due to space constraints on the MCU, only a limited number of effect can be enabled at once. Look at the `config.h` file and enable your favorite effect.
+
+This layout also supports VIA.
+
+## Customizing the keymap
+
+### Dynamic DPI scaling
+
+Use the following keycodes to change the default DPI:
+
+-   `POINTER_DEFAULT_DPI_FORWARD`: increases the DPI; decreases when shifted;
+-   `POINTER_DEFAULT_DPI_REVERSE`: decreases the DPI; increases when shifted.
+
+There's a maximum of 16 possible values for the sniping mode DPI. See the [Charybdis documentation](../../README.md) for more information.
+
+Use the following keycodes to change the sniping mode DPI:
+
+-   `POINTER_SNIPING_DPI_FORWARD`: increases the DPI; decreases when shifted;
+-   `POINTER_SNIPING_DPI_REVERSE`: decreases the DPI; increases when shifted.
+
+There's a maximum of 4 possible values for the sniping mode DPI. See the [Charybdis documentation](../../README.md) for more information.
+
+### Drag-scroll
+
+Use the `DRAGSCROLL_MODE` keycode to enable drag-scroll on hold. Use the `DRAGSCROLL_TOGGLE` keycode to enable/disable drag-scroll on key press.
+
+### Sniping
+
+Use the `SNIPING_MODE` keycode to enable sniping mode on hold. Use the `SNIPING_TOGGLE` keycode to enable/disable sniping mode on key press.
+
+Change the value of `CHARYBDIS_AUTO_SNIPING_ON_LAYER` to automatically enable sniping mode on layer change. By default, sniping mode is enabled on the pointer layer:
+
+```c
+#define CHARYBDIS_AUTO_SNIPING_ON_LAYER LAYER_POINTER
+```
+
+### Auto pointer layer
+
+The pointer layer can be automatically enabled when moving the trackball. To enable or disable this behavior, add or remove the following define:
+
+```c
+#define CHARYBDIS_AUTO_POINTER_LAYER_TRIGGER_ENABLE
+```
+
+By default, the layer is turned off 1 second after the last registered trackball movement:
+
+```c
+#define CHARYBDIS_AUTO_POINTER_LAYER_TRIGGER_TIMEOUT_MS 1000
+```
+
+The trigger sensibility can also be tuned. The lower the value, the more sensible the trigger:
+
+```c
+#define CHARYBDIS_AUTO_POINTER_LAYER_TRIGGER_THRESHOLD 8
+```
+
+## Layout
+
+![Keymap layout (generated with keyboard-layout-editor.com)](https://i.imgur.com/uHEnqEN.png)
diff --git a/keyboards/bastardkb/charybdis/3x5/keymaps/via/rules.mk b/keyboards/bastardkb/charybdis/3x5/keymaps/via/rules.mk
new file mode 100644
index 0000000000..1e5b99807c
--- /dev/null
+++ b/keyboards/bastardkb/charybdis/3x5/keymaps/via/rules.mk
@@ -0,0 +1 @@
+VIA_ENABLE = yes
diff --git a/keyboards/bastardkb/charybdis/3x5/readme.md b/keyboards/bastardkb/charybdis/3x5/readme.md
new file mode 100644
index 0000000000..7a91035bea
--- /dev/null
+++ b/keyboards/bastardkb/charybdis/3x5/readme.md
@@ -0,0 +1,15 @@
+# Charybdis Nano (3x5)
+
+An ergonomic keyboard with integrated trackball.
+
+The Charybdis is available in 4x6 and 3x5 form factor at [bastardkb.com](https://bastardkb.com).
+
+## Keymaps
+
+### [`default`](keymaps/default)
+
+A simple QWERTY layout with 4 layers.
+
+### [`via`](keymaps/via)
+
+A [Miryoku-inspired](https://github.com/manna-harbour/miryoku), feature-rich, keymap with VIA support.
diff --git a/keyboards/bastardkb/charybdis/3x5/rules.mk b/keyboards/bastardkb/charybdis/3x5/rules.mk
new file mode 100644
index 0000000000..c5f3f0fb8c
--- /dev/null
+++ b/keyboards/bastardkb/charybdis/3x5/rules.mk
@@ -0,0 +1,38 @@
+# MCU name
+MCU = atmega32u4
+
+# Bootloader selection
+BOOTLOADER = atmel-dfu
+
+# Build Options
+#   change yes to no to disable
+#
+BOOTMAGIC_ENABLE = yes      # Enable Bootmagic Lite
+MOUSEKEY_ENABLE = no        # Mouse keys
+EXTRAKEY_ENABLE = yes       # Audio control and System control
+CONSOLE_ENABLE = no         # Console for debug
+COMMAND_ENABLE = no         # Commands for debug and configuration
+NKRO_ENABLE = no            # Enable N-Key Rollover
+BACKLIGHT_ENABLE = no       # Enable keyboard backlight functionality
+RGBLIGHT_ENABLE = no        # Enable keyboard RGB underglow
+AUDIO_ENABLE = no           # Audio output
+
+AUDIO_SUPPORTED = no        # Audio is not supported
+RGB_MATRIX_SUPPORTED = yes  # RGB matrix is supported and enabled by default
+RGBLIGHT_SUPPORTED = yes    # RGB underglow is supported, but not enabled by default
+RGB_MATRIX_ENABLE = yes     # Enable keyboard RGB matrix functionality
+RGB_MATRIX_DRIVER = WS2812
+
+# Enable link-time optimization by default.  The Charybdis packs a lot of
+# features (RGB, Via, trackball) in a small atmega32u4 package.
+LTO_ENABLE = yes
+
+# Charybdis nano is a split 3x5 keyboard with a maximum of 3 thumb keys (2 on
+# the trackball side).
+SPLIT_KEYBOARD = yes
+LAYOUTS = split_3x5_3 # Support community layout, in particular Manna-Harbour's Miryoku layout
+
+POINTING_DEVICE_ENABLE = yes # Enable trackball
+POINTING_DEVICE_DRIVER = pmw3360
+# https://qmk.fm/changes/2018-11-16-use-a-single-endpoint-for-hid-reports
+MOUSE_SHARED_EP = no # Unify multiple HID interfaces into a single Endpoint
diff --git a/keyboards/bastardkb/charybdis/4x6/4x6.c b/keyboards/bastardkb/charybdis/4x6/4x6.c
new file mode 100644
index 0000000000..6cd8fffee7
--- /dev/null
+++ b/keyboards/bastardkb/charybdis/4x6/4x6.c
@@ -0,0 +1,94 @@
+/*
+ * Copyright 2020 Christopher Courtney <drashna@live.com> (@drashna)
+ * Copyright 2021 Quentin LEBASTARD <qlebastard@gmail.com>
+ * Copyright 2021 Charly Delay <charly@codesink.dev> (@0xcharly)
+ *
+ * This program is free software: you can redistribute it and/or modify
+ * it under the terms of the GNU General Publicw 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 "4x6.h"
+
+// clang-format off
+#ifdef RGB_MATRIX_ENABLE
+/**
+ * \brief LEDs index.
+ *
+ * ╭────────────────────────╮                 ╭────────────────────────╮
+ *    0   7   8  15  16  20                     49  45  44  37  36  29
+ * ├────────────────────────┤                 ├────────────────────────┤
+ *    1   6   9  14  17  21                     50  46  43  38  35  30
+ * ├────────────────────────┤                 ├────────────────────────┤
+ *    2   5  10  13  18  22                     51  47  42  39  34  31
+ * ├────────────────────────┤                 ├────────────────────────┤
+ *    3   4  11  12  19  23                     52  48  41  40  33  32
+ * ╰────────────────────────╯                 ╰────────────────────────╯
+ *                       26  27  28     53  54  XX
+ *                           25  24     55  XX
+ *                     ╰────────────╯ ╰────────────╯
+ */
+led_config_t g_led_config = { {
+    /* Key Matrix to LED index. */
+    // Left split.
+    {      0,      7,      8,     15,     16,     20 }, // Num row
+    {      1,      6,      9,     14,     17,     21 }, // Top row
+    {      2,      5,     10,     13,     18,     22 }, // Middle row
+    {      3,      4,     11,     12,     19,     23 }, // Bottom row
+    { NO_LED,     28,     24,     26,     27,     25 }, // Thumb cluster
+    // Right split.
+    {     29,     36,     37,     44,     45,     49 }, // Num row
+    {     30,     35,     38,     43,     46,     50 }, // Top row
+    {     31,     34,     39,     42,     47,     51 }, // Middle row
+    {     32,     33,     40,     41,     48,     52 }, // Bottom row
+    { NO_LED,     53,     55,     54, NO_LED, NO_LED }, // Thumb cluster
+}, {
+    /* LED index to physical position. */
+    // Left split.
+    /* index=0  */ {   0,   0 }, {   0,  12 }, {   0,  24 }, {   0,  36 }, // col 1 (left most)
+    /* index=4  */ {  16,  36 }, {  16,  24 }, {  16,  12 }, {  16,   0 }, // col 2
+    /* index=8  */ {  32,   0 }, {  32,  12 }, {  32,  24 }, {  32,  36 },
+    /* index=12 */ {  48,  36 }, {  48,  24 }, {  48,  12 }, {  48,   0 },
+    /* index=16 */ {  64,   0 }, {  64,  12 }, {  64,  24 }, {  64,  36 },
+    /* index=20 */ {  80,   0 }, {  80,  12 }, {  80,  24 }, {  80,  36 },
+    /* index=24 */ { 112,  64 }, {  96,  64 }, {  80,  52 },
+    /* index=27 */ {  96,  52 }, { 112,  52 },
+    // Right split.
+    /* index=29 */ { 224,   0 }, { 224,  12 }, { 224,  24 }, { 224,  36 }, // col 12 (right most)
+    /* index=33 */ { 208,  36 }, { 208,  24 }, { 208,  12 }, { 208,   0 }, // col 11
+    /* index=37 */ { 192,   0 }, { 192,  12 }, { 192,  24 }, { 192,  36 },
+    /* index=41 */ { 176,  36 }, { 176,  24 }, { 176,  12 }, { 176,   0 },
+    /* index=45 */ { 160,   0 }, { 160,  12 }, { 160,  24 }, { 160,  36 },
+    /* index=49 */ { 144,   0 }, { 144,  12 }, { 144,  24 }, { 144,  36 },
+    /* index=53 */ { 112,  52 }, { 128,  64 }, { 112,  64 },
+}, {
+    /* LED index to flag. */
+    // Left split.
+    /* index=0  */ LED_FLAG_KEYLIGHT, LED_FLAG_KEYLIGHT, LED_FLAG_KEYLIGHT, LED_FLAG_KEYLIGHT, // col 1
+    /* index=4  */ LED_FLAG_KEYLIGHT, LED_FLAG_KEYLIGHT, LED_FLAG_KEYLIGHT, LED_FLAG_KEYLIGHT, // col 2
+    /* index=8  */ LED_FLAG_KEYLIGHT, LED_FLAG_KEYLIGHT, LED_FLAG_KEYLIGHT, LED_FLAG_KEYLIGHT,
+    /* index=12 */ LED_FLAG_KEYLIGHT, LED_FLAG_KEYLIGHT, LED_FLAG_KEYLIGHT, LED_FLAG_KEYLIGHT,
+    /* index=16 */ LED_FLAG_KEYLIGHT, LED_FLAG_KEYLIGHT, LED_FLAG_KEYLIGHT, LED_FLAG_KEYLIGHT,
+    /* index=20 */ LED_FLAG_KEYLIGHT, LED_FLAG_KEYLIGHT, LED_FLAG_KEYLIGHT, LED_FLAG_KEYLIGHT,
+    /* index=24 */ LED_FLAG_MODIFIER, LED_FLAG_MODIFIER, LED_FLAG_MODIFIER, // Thumb cluster top
+    /* index=27 */ LED_FLAG_MODIFIER, LED_FLAG_MODIFIER,                    // Thumb cluster bottom
+    // Right split.
+    /* index=29 */ LED_FLAG_KEYLIGHT, LED_FLAG_KEYLIGHT, LED_FLAG_KEYLIGHT, LED_FLAG_KEYLIGHT, // col 12
+    /* index=33 */ LED_FLAG_KEYLIGHT, LED_FLAG_KEYLIGHT, LED_FLAG_KEYLIGHT, LED_FLAG_KEYLIGHT, // col 11
+    /* index=37 */ LED_FLAG_KEYLIGHT, LED_FLAG_KEYLIGHT, LED_FLAG_KEYLIGHT, LED_FLAG_KEYLIGHT,
+    /* index=41 */ LED_FLAG_KEYLIGHT, LED_FLAG_KEYLIGHT, LED_FLAG_KEYLIGHT, LED_FLAG_KEYLIGHT,
+    /* index=45 */ LED_FLAG_KEYLIGHT, LED_FLAG_KEYLIGHT, LED_FLAG_KEYLIGHT, LED_FLAG_KEYLIGHT,
+    /* index=49 */ LED_FLAG_KEYLIGHT, LED_FLAG_KEYLIGHT, LED_FLAG_KEYLIGHT, LED_FLAG_KEYLIGHT,
+    /* index=53 */ LED_FLAG_KEYLIGHT, LED_FLAG_KEYLIGHT, LED_FLAG_KEYLIGHT, // Thumb cluster
+} };
+#endif
+// clang-format on
diff --git a/keyboards/bastardkb/charybdis/4x6/4x6.h b/keyboards/bastardkb/charybdis/4x6/4x6.h
new file mode 100644
index 0000000000..c26d356d69
--- /dev/null
+++ b/keyboards/bastardkb/charybdis/4x6/4x6.h
@@ -0,0 +1,44 @@
+/*
+ * Copyright 2021 Quentin LEBASTARD <qlebastard@gmail.com>
+ * Copyright 2021 Charly Delay <charly@codesink.dev> (@0xcharly)
+ *
+ * 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 "charybdis.h"
+
+// clang-format off
+#define LAYOUT_charybdis_4x6(                                     \
+  k00, k01, k02, k03, k04, k05,     k55, k54, k53, k52, k51, k50, \
+  k10, k11, k12, k13, k14, k15,     k65, k64, k63, k62, k61, k60, \
+  k20, k21, k22, k23, k24, k25,     k75, k74, k73, k72, k71, k70, \
+  k30, k31, k32, k33, k34, k35,     k85, k84, k83, k82, k81, k80, \
+                 k43, k44, k41,     k91, k93,                     \
+                      k45, k42,     k95                           \
+)                                                                 \
+{                                                                 \
+  {   k00,   k01,   k02,   k03,   k04,   k05 },                   \
+  {   k10,   k11,   k12,   k13,   k14,   k15 },                   \
+  {   k20,   k21,   k22,   k23,   k24,   k25 },                   \
+  {   k30,   k31,   k32,   k33,   k34,   k35 },                   \
+  { KC_NO,   k41,   k42,   k43,   k44,   k45 },                   \
+  {   k50,   k51,   k52,   k53,   k54,   k55 },                   \
+  {   k60,   k61,   k62,   k63,   k64,   k65 },                   \
+  {   k70,   k71,   k72,   k73,   k74,   k75 },                   \
+  {   k80,   k81,   k82,   k83,   k84,   k85 },                   \
+  { KC_NO,   k91, KC_NO,   k93, KC_NO,   k95 },                   \
+}
+// clang-format on
diff --git a/keyboards/bastardkb/charybdis/4x6/config.h b/keyboards/bastardkb/charybdis/4x6/config.h
new file mode 100644
index 0000000000..f00fb382f6
--- /dev/null
+++ b/keyboards/bastardkb/charybdis/4x6/config.h
@@ -0,0 +1,84 @@
+/*
+ * Copyright 2021 Quentin LEBASTARD <qlebastard@gmail.com>
+ * Copyright 2021 Charly Delay <charly@codesink.dev> (@0xcharly)
+ *
+ * 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
+
+#define VENDOR_ID 0xA8F8
+#define PRODUCT_ID 0x1833
+#define DEVICE_VER 0x0001
+#define MANUFACTURER Bastard Keyboards
+#define PRODUCT Charybdis
+
+/* Key matrix configuration. */
+
+// Rows are doubled-up.
+#define MATRIX_ROWS 10
+#define MATRIX_COLS 6
+
+// Wiring configuration for each half.
+#define MATRIX_ROW_PINS \
+    { F1, B7, C6, D4, B5 }
+#define MATRIX_COL_PINS \
+    { D5, C7, F0, D7, E6, B4 }
+
+#define MATRIX_ROW_PINS_RIGHT \
+    { D5, F0, C6, D4, B5 }
+#define MATRIX_COL_PINS_RIGHT \
+    { F1, C7, B7, D7, E6, B4 }
+
+#define DIODE_DIRECTION ROW2COL
+
+#define ROTATIONAL_TRANSFORM_ANGLE -25
+
+/* Handedness. */
+#define MASTER_RIGHT
+
+/* Bootmagic Lite configuration. */
+#define BOOTMAGIC_LITE_ROW 0
+#define BOOTMAGIC_LITE_COLUMN 0
+#define BOOTMAGIC_LITE_ROW_RIGHT 5
+#define BOOTMAGIC_LITE_COLUMN_RIGHT 0
+
+/* serial.c configuration (for split keyboard) */
+#define SOFT_SERIAL_PIN D2
+
+/* Set 0 if debouncing isn't needed */
+#define DEBOUNCE 5
+
+/* Disable action features. */
+#define NO_ACTION_MACRO     // Disable old-style macro handling.
+#define NO_ACTION_FUNCTION  // Disable old-style function handling.
+
+/* PMW3360 settings. */
+#define PMW3360_CS_PIN B0
+
+#define RGB_DI_PIN D3
+#define RGBLED_NUM 56
+#define RGBLED_SPLIT \
+    { 29, 27 }
+
+/* RGB matrix support. */
+#ifdef RGB_MATRIX_ENABLE
+#    define SPLIT_TRANSPORT_MIRROR
+#    define DRIVER_LED_TOTAL RGBLED_NUM
+#    define RGB_MATRIX_SPLIT RGBLED_SPLIT
+#    define RGB_MATRIX_MAXIMUM_BRIGHTNESS 50
+#    define RGB_MATRIX_STARTUP_VAL RGB_MATRIX_MAXIMUM_BRIGHTNESS
+#    define RGB_DISABLE_WHEN_USB_SUSPENDED
+#    define RGB_MATRIX_KEYPRESSES
+#endif
diff --git a/keyboards/bastardkb/charybdis/4x6/info.json b/keyboards/bastardkb/charybdis/4x6/info.json
new file mode 100644
index 0000000000..956dfe88f5
--- /dev/null
+++ b/keyboards/bastardkb/charybdis/4x6/info.json
@@ -0,0 +1,67 @@
+{
+    "keyboard_name": "Charybdis",
+    "url": "https://www.bastardkb.com",
+    "maintainer": "Quentin Lebastard",
+    "layouts": {
+        "LAYOUT_charybdis_4x6": {
+            "layout": [
+                { "label": "L00", "x": 0, "y": 0 },
+                { "label": "L01", "x": 1, "y": 0 },
+                { "label": "L02", "x": 2, "y": 0 },
+                { "label": "L03", "x": 3, "y": 0 },
+                { "label": "L04", "x": 4, "y": 0 },
+                { "label": "L05", "x": 5, "y": 0 },
+                { "label": "R00", "x": 11, "y": 0 },
+                { "label": "R01", "x": 12, "y": 0 },
+                { "label": "R02", "x": 13, "y": 0 },
+                { "label": "R03", "x": 14, "y": 0 },
+                { "label": "R04", "x": 15, "y": 0 },
+                { "label": "R05", "x": 16, "y": 0 },
+                { "label": "L10", "x": 0, "y": 1 },
+                { "label": "L11", "x": 1, "y": 1 },
+                { "label": "L12", "x": 2, "y": 1 },
+                { "label": "L13", "x": 3, "y": 1 },
+                { "label": "L14", "x": 4, "y": 1 },
+                { "label": "L15", "x": 5, "y": 1 },
+                { "label": "R10", "x": 11, "y": 1 },
+                { "label": "R11", "x": 12, "y": 1 },
+                { "label": "R12", "x": 13, "y": 1 },
+                { "label": "R13", "x": 14, "y": 1 },
+                { "label": "R14", "x": 15, "y": 1 },
+                { "label": "R15", "x": 16, "y": 1 },
+                { "label": "L20", "x": 0, "y": 2 },
+                { "label": "L21", "x": 1, "y": 2 },
+                { "label": "L22", "x": 2, "y": 2 },
+                { "label": "L23", "x": 3, "y": 2 },
+                { "label": "L24", "x": 4, "y": 2 },
+                { "label": "L25", "x": 5, "y": 2 },
+                { "label": "R20", "x": 11, "y": 2 },
+                { "label": "R21", "x": 12, "y": 2 },
+                { "label": "R22", "x": 13, "y": 2 },
+                { "label": "R23", "x": 14, "y": 2 },
+                { "label": "R24", "x": 15, "y": 2 },
+                { "label": "R25", "x": 16, "y": 2 },
+                { "label": "L30", "x": 0, "y": 3 },
+                { "label": "L31", "x": 1, "y": 3 },
+                { "label": "L32", "x": 2, "y": 3 },
+                { "label": "L33", "x": 3, "y": 3 },
+                { "label": "L34", "x": 4, "y": 3 },
+                { "label": "L35", "x": 5, "y": 3 },
+                { "label": "R30", "x": 11, "y": 3 },
+                { "label": "R31", "x": 12, "y": 3 },
+                { "label": "R32", "x": 13, "y": 3 },
+                { "label": "R33", "x": 14, "y": 3 },
+                { "label": "R34", "x": 15, "y": 3 },
+                { "label": "R35", "x": 16, "y": 3 },
+                { "label": "L40", "x": 5, "y": 4 },
+                { "label": "L41", "x": 6, "y": 4 },
+                { "label": "L42", "x": 7, "y": 4 },
+                { "label": "R40", "x": 9, "y": 4 },
+                { "label": "R41", "x": 10, "y": 4 },
+                { "label": "L50", "x": 6, "y": 5 },
+                { "label": "L51", "x": 7, "y": 5 },
+                { "label": "R50", "x": 9, "y": 5 }
+            ]
+        }
+    }
+}
diff --git a/keyboards/bastardkb/charybdis/4x6/keymaps/default/config.h b/keyboards/bastardkb/charybdis/4x6/keymaps/default/config.h
new file mode 100644
index 0000000000..383b3f9dc3
--- /dev/null
+++ b/keyboards/bastardkb/charybdis/4x6/keymaps/default/config.h
@@ -0,0 +1,39 @@
+/**
+ * Copyright 2021 Charly Delay <charly@codesink.dev> (@0xcharly)
+ *
+ * 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
+
+/* RGB Matrix. */
+
+#ifdef RGB_MATRIX_ENABLE
+// Limit maximum brightness to keep power consumption reasonable, and avoid
+// disconnects.
+#    undef RGB_MATRIX_MAXIMUM_BRIGHTNESS
+#    define RGB_MATRIX_MAXIMUM_BRIGHTNESS 64
+
+// Rainbow swirl as startup mode.
+#    define ENABLE_RGB_MATRIX_CYCLE_LEFT_RIGHT
+#    define RGB_MATRIX_STARTUP_MODE RGB_MATRIX_CYCLE_LEFT_RIGHT
+
+// Slow swirl at startup.
+#    define RGB_MATRIX_STARTUP_SPD 32
+
+// Startup values.
+#    define RGB_MATRIX_STARTUP_HUE 0
+#    define RGB_MATRIX_STARTUP_SAT 255
+#    define RGB_MATRIX_STARTUP_VAL RGB_MATRIX_MAXIMUM_BRIGHTNESS
+#    define RGB_MATRIX_STARTUP_HSV RGB_MATRIX_STARTUP_HUE, RGB_MATRIX_STARTUP_SAT, RGB_MATRIX_STARTUP_VAL
+#endif  // RGB_MATRIX_ENABLE
diff --git a/keyboards/bastardkb/charybdis/4x6/keymaps/default/keymap.c b/keyboards/bastardkb/charybdis/4x6/keymaps/default/keymap.c
new file mode 100644
index 0000000000..de8eed9c03
--- /dev/null
+++ b/keyboards/bastardkb/charybdis/4x6/keymaps/default/keymap.c
@@ -0,0 +1,75 @@
+/**
+ * Copyright 2021 Charly Delay <charly@codesink.dev> (@0xcharly)
+ *
+ * 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
+
+enum charybdis_keymap_layers {
+    LAYER_BASE = 0,
+    LAYER_LOWER,
+    LAYER_RAISE,
+};
+
+#define LOWER MO(LAYER_LOWER)
+#define RAISE MO(LAYER_RAISE)
+
+// clang-format off
+const uint16_t PROGMEM keymaps[][MATRIX_ROWS][MATRIX_COLS] = {
+  [LAYER_BASE] = LAYOUT_charybdis_4x6(
+  // ╭──────────────────────────────────────────────────────╮ ╭──────────────────────────────────────────────────────╮
+        KC_ESC,    KC_1,    KC_2,    KC_3,    KC_4,    KC_5,       KC_6,    KC_7,    KC_8,    KC_9,    KC_0, KC_MINS,
+  // ├──────────────────────────────────────────────────────┤ ├──────────────────────────────────────────────────────┤
+        KC_TAB,    KC_Q,    KC_W,    KC_E,    KC_R,    KC_T,       KC_Y,    KC_U,    KC_I,    KC_O,    KC_P, KC_BSLS,
+  // ├──────────────────────────────────────────────────────┤ ├──────────────────────────────────────────────────────┤
+       KC_LSFT,    KC_A,    KC_S,    KC_D,    KC_F,    KC_G,       KC_H,    KC_J,    KC_K,    KC_L, KC_SCLN, KC_QUOT,
+  // ├──────────────────────────────────────────────────────┤ ├──────────────────────────────────────────────────────┤
+       KC_LCTL,    KC_Z,    KC_X,    KC_C,    KC_V,    KC_B,       KC_N,    KC_M, KC_COMM,  KC_DOT, KC_SLSH, KC_LALT,
+  // ╰──────────────────────────────────────────────────────┤ ├──────────────────────────────────────────────────────╯
+                                   KC_LGUI, KC_SPC,   LOWER,      RAISE,  KC_ENT,
+                                           KC_LALT, KC_BSPC,     KC_DEL
+  //                            ╰───────────────────────────╯ ╰──────────────────╯
+  ),
+
+  [LAYER_LOWER] = LAYOUT_charybdis_4x6(
+  // ╭──────────────────────────────────────────────────────╮ ╭──────────────────────────────────────────────────────╮
+       KC_TILD, KC_EXLM,   KC_AT, KC_HASH,  KC_DLR, KC_PERC,    KC_CIRC, KC_AMPR, KC_ASTR, KC_LPRN, KC_RPRN, KC_UNDS,
+  // ├──────────────────────────────────────────────────────┤ ├──────────────────────────────────────────────────────┤
+       RGB_MOD, XXXXXXX, XXXXXXX, XXXXXXX, XXXXXXX, XXXXXXX,    KC_LBRC,   KC_P7,   KC_P8,   KC_P9, KC_RBRC, XXXXXXX,
+  // ├──────────────────────────────────────────────────────┤ ├──────────────────────────────────────────────────────┤
+       RGB_TOG, KC_LGUI, KC_LALT, KC_LCTL, KC_LSFT, XXXXXXX,    KC_PPLS,   KC_P4,   KC_P5,   KC_P6, KC_PMNS, KC_PEQL,
+  // ├──────────────────────────────────────────────────────┤ ├──────────────────────────────────────────────────────┤
+      RGB_RMOD, XXXXXXX, XXXXXXX, XXXXXXX, EEP_RST,   RESET,    KC_PAST,   KC_P1,   KC_P2,   KC_P3, KC_PSLS, KC_PDOT,
+  // ╰──────────────────────────────────────────────────────┤ ├──────────────────────────────────────────────────────╯
+                                  XXXXXXX, XXXXXXX, _______,    XXXXXXX, _______,
+                                           XXXXXXX, XXXXXXX,      KC_P0
+  //                            ╰───────────────────────────╯ ╰──────────────────╯
+  ),
+
+  [LAYER_RAISE] = LAYOUT_charybdis_4x6(
+  // ╭──────────────────────────────────────────────────────╮ ╭──────────────────────────────────────────────────────╮
+        KC_F12,   KC_F1,   KC_F2,   KC_F3,   KC_F4,   KC_F5,      KC_F6,   KC_F7,   KC_F8,   KC_F9,  KC_F10,  KC_F11,
+  // ├──────────────────────────────────────────────────────┤ ├──────────────────────────────────────────────────────┤
+       KC_MNXT, XXXXXXX, XXXXXXX, XXXXXXX, XXXXXXX, XXXXXXX,    XXXXXXX, XXXXXXX, XXXXXXX, XXXXXXX, XXXXXXX, KC_VOLU,
+  // ├──────────────────────────────────────────────────────┤ ├──────────────────────────────────────────────────────┤
+       KC_MPLY, KC_LEFT,   KC_UP, KC_DOWN, KC_RGHT, XXXXXXX,    XXXXXXX, KC_RSFT, KC_RCTL, KC_RALT, KC_RGUI, KC_MUTE,
+  // ├──────────────────────────────────────────────────────┤ ├──────────────────────────────────────────────────────┤
+       KC_MPRV, KC_HOME, KC_PGUP, KC_PGDN,  KC_END, XXXXXXX,      RESET, EEP_RST, XXXXXXX, XXXXXXX, XXXXXXX, KC_VOLD,
+  // ╰──────────────────────────────────────────────────────┤ ├──────────────────────────────────────────────────────╯
+                                  _______, _______, XXXXXXX,    _______, XXXXXXX,
+                                           _______, _______,    XXXXXXX
+  //                            ╰───────────────────────────╯ ╰──────────────────╯
+  ),
+};
+// clang-format on
diff --git a/keyboards/bastardkb/charybdis/4x6/keymaps/default/readme.md b/keyboards/bastardkb/charybdis/4x6/keymaps/default/readme.md
new file mode 100644
index 0000000000..23a85e54d5
--- /dev/null
+++ b/keyboards/bastardkb/charybdis/4x6/keymaps/default/readme.md
@@ -0,0 +1,7 @@
+# Charybdis (4x6) default keymap
+
+> :bulb: Have a look at the [`via` keymap](../via) for a more feature-rich layout.
+
+The Charydbis (4x6) default keymap is inspired from the original [Dactyl Manuform](../../../../../handwired/dactyl_manuform) default keymap.
+
+This layout supports RGB matrix. However, due to space constraints on the MCU, only a limited number of effect can be enabled at once. Look at the `config.h` file and enable your favorite effect.
diff --git a/keyboards/bastardkb/charybdis/4x6/keymaps/via/config.h b/keyboards/bastardkb/charybdis/4x6/keymaps/via/config.h
new file mode 100644
index 0000000000..75eb2240f3
--- /dev/null
+++ b/keyboards/bastardkb/charybdis/4x6/keymaps/via/config.h
@@ -0,0 +1,72 @@
+/**
+ * Copyright 2021 Charly Delay <charly@codesink.dev> (@0xcharly)
+ *
+ * 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
+
+#ifdef VIA_ENABLE
+/* VIA configuration. */
+#    define DYNAMIC_KEYMAP_LAYER_COUNT 4
+#endif  // VIA_ENABLE
+
+/* Disable unused features. */
+#define NO_ACTION_ONESHOT
+
+#ifndef TAPPING_TERM
+/**
+ * \brief Configure the global tapping term (default: 200ms).
+ *
+ * If you have a lot of accidental mod activations, crank up the tapping term.
+ *
+ * See docs.qmk.fm/using-qmk/software-features/tap_hold#tapping-term
+ */
+#    define TAPPING_TERM 200
+#endif  // TAPPING_TERM
+
+/* Charybdis-specific features. */
+
+#ifdef POINTING_DEVICE_ENABLE
+// Enable pointer acceleration, which increases the speed by ~2x for large
+// displacement, while maintaining 1x speed for slow movements.
+// - `CHARYBDIS_POINTER_ACCELERATION_FACTOR`
+#    define CHARYBDIS_POINTER_ACCELERATION_ENABLE
+
+// Automatically enable the pointer layer when moving the trackball.  See also:
+// - `CHARYBDIS_AUTO_POINTER_LAYER_TRIGGER_TIMEOUT_MS`
+// - `CHARYBDIS_AUTO_POINTER_LAYER_TRIGGER_THRESHOLD`
+// #define CHARYBDIS_AUTO_POINTER_LAYER_TRIGGER_ENABLE
+#endif  // POINTING_DEVICE_ENABLE
+
+/* RGB Matrix. */
+
+#ifdef RGB_MATRIX_ENABLE
+// Limit maximum brightness to keep power consumption reasonable, and avoid
+// disconnects.
+#    undef RGB_MATRIX_MAXIMUM_BRIGHTNESS
+#    define RGB_MATRIX_MAXIMUM_BRIGHTNESS 64
+
+// Rainbow swirl as startup mode.
+#    define ENABLE_RGB_MATRIX_CYCLE_LEFT_RIGHT
+#    define RGB_MATRIX_STARTUP_MODE RGB_MATRIX_CYCLE_LEFT_RIGHT
+
+// Slow swirl at startup.
+#    define RGB_MATRIX_STARTUP_SPD 32
+
+// Startup values.
+#    define RGB_MATRIX_STARTUP_HUE 0
+#    define RGB_MATRIX_STARTUP_SAT 255
+#    define RGB_MATRIX_STARTUP_VAL RGB_MATRIX_MAXIMUM_BRIGHTNESS
+#    define RGB_MATRIX_STARTUP_HSV RGB_MATRIX_STARTUP_HUE, RGB_MATRIX_STARTUP_SAT, RGB_MATRIX_STARTUP_VAL
+#endif  // RGB_MATRIX_ENABLE
diff --git a/keyboards/bastardkb/charybdis/4x6/keymaps/via/keymap.c b/keyboards/bastardkb/charybdis/4x6/keymaps/via/keymap.c
new file mode 100644
index 0000000000..d53d580a48
--- /dev/null
+++ b/keyboards/bastardkb/charybdis/4x6/keymaps/via/keymap.c
@@ -0,0 +1,166 @@
+/**
+ * Copyright 2021 Charly Delay <charly@codesink.dev> (@0xcharly)
+ *
+ * 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
+
+#ifdef CHARYBDIS_AUTO_POINTER_LAYER_TRIGGER_ENABLE
+#    include "timer.h"
+#endif  // CHARYBDIS_AUTO_POINTER_LAYER_TRIGGER_ENABLE
+
+enum charybdis_keymap_layers {
+    LAYER_BASE = 0,
+    LAYER_LOWER,
+    LAYER_RAISE,
+    LAYER_POINTER,
+};
+
+/** \brief Automatically enable sniping-mode on the pointer layer. */
+#define CHARYBDIS_AUTO_SNIPING_ON_LAYER LAYER_POINTER
+
+#ifdef CHARYBDIS_AUTO_POINTER_LAYER_TRIGGER_ENABLE
+static uint16_t auto_pointer_layer_timer = 0;
+
+#    ifndef CHARYBDIS_AUTO_POINTER_LAYER_TRIGGER_TIMEOUT_MS
+#        define CHARYBDIS_AUTO_POINTER_LAYER_TRIGGER_TIMEOUT_MS 1000
+#    endif  // CHARYBDIS_AUTO_POINTER_LAYER_TRIGGER_TIMEOUT_MS
+
+#    ifndef CHARYBDIS_AUTO_POINTER_LAYER_TRIGGER_THRESHOLD
+#        define CHARYBDIS_AUTO_POINTER_LAYER_TRIGGER_THRESHOLD 8
+#    endif  // CHARYBDIS_AUTO_POINTER_LAYER_TRIGGER_THRESHOLD
+#endif      // CHARYBDIS_AUTO_POINTER_LAYER_TRIGGER_ENABLE
+
+#define LOWER MO(LAYER_LOWER)
+#define RAISE MO(LAYER_RAISE)
+#define PT_Z LT(LAYER_POINTER, KC_Z)
+#define PT_SLSH LT(LAYER_POINTER, KC_SLSH)
+
+// clang-format off
+const uint16_t PROGMEM keymaps[][MATRIX_ROWS][MATRIX_COLS] = {
+  [LAYER_BASE] = LAYOUT_charybdis_4x6(
+  // ╭──────────────────────────────────────────────────────╮ ╭──────────────────────────────────────────────────────╮
+        KC_ESC,    KC_1,    KC_2,    KC_3,    KC_4,    KC_5,       KC_6,    KC_7,    KC_8,    KC_9,    KC_0, KC_MINS,
+  // ├──────────────────────────────────────────────────────┤ ├──────────────────────────────────────────────────────┤
+        KC_TAB,    KC_Q,    KC_W,    KC_E,    KC_R,    KC_T,       KC_Y,    KC_U,    KC_I,    KC_O,    KC_P, KC_BSLS,
+  // ├──────────────────────────────────────────────────────┤ ├──────────────────────────────────────────────────────┤
+       KC_LSFT,    KC_A,    KC_S,    KC_D,    KC_F,    KC_G,       KC_H,    KC_J,    KC_K,    KC_L, KC_SCLN, KC_QUOT,
+  // ├──────────────────────────────────────────────────────┤ ├──────────────────────────────────────────────────────┤
+       KC_LCTL,    PT_Z,    KC_X,    KC_C,    KC_V,    KC_B,       KC_N,    KC_M, KC_COMM,  KC_DOT, PT_SLSH, KC_LALT,
+  // ╰──────────────────────────────────────────────────────┤ ├──────────────────────────────────────────────────────╯
+                                   KC_LGUI, KC_SPC,   LOWER,      RAISE,  KC_ENT,
+                                           KC_LALT, KC_BSPC,     KC_DEL
+  //                            ╰───────────────────────────╯ ╰──────────────────╯
+  ),
+
+  [LAYER_LOWER] = LAYOUT_charybdis_4x6(
+  // ╭──────────────────────────────────────────────────────╮ ╭──────────────────────────────────────────────────────╮
+       KC_TILD, KC_EXLM,   KC_AT, KC_HASH,  KC_DLR, KC_PERC,    KC_CIRC, KC_AMPR, KC_ASTR, KC_LPRN, KC_RPRN, KC_UNDS,
+  // ├──────────────────────────────────────────────────────┤ ├──────────────────────────────────────────────────────┤
+       RGB_MOD, XXXXXXX, XXXXXXX, XXXXXXX, XXXXXXX, XXXXXXX,    KC_LBRC,   KC_P7,   KC_P8,   KC_P9, KC_RBRC, XXXXXXX,
+  // ├──────────────────────────────────────────────────────┤ ├──────────────────────────────────────────────────────┤
+       RGB_TOG, KC_LGUI, KC_LALT, KC_LCTL, KC_LSFT, XXXXXXX,    KC_PPLS,   KC_P4,   KC_P5,   KC_P6, KC_PMNS, KC_PEQL,
+  // ├──────────────────────────────────────────────────────┤ ├──────────────────────────────────────────────────────┤
+      RGB_RMOD, XXXXXXX, XXXXXXX, XXXXXXX, XXXXXXX, XXXXXXX,    KC_PAST,   KC_P1,   KC_P2,   KC_P3, KC_PSLS, KC_PDOT,
+  // ╰──────────────────────────────────────────────────────┤ ├──────────────────────────────────────────────────────╯
+                                  XXXXXXX, XXXXXXX, _______,    XXXXXXX, _______,
+                                           XXXXXXX, XXXXXXX,      KC_P0
+  //                            ╰───────────────────────────╯ ╰──────────────────╯
+  ),
+
+  [LAYER_RAISE] = LAYOUT_charybdis_4x6(
+  // ╭──────────────────────────────────────────────────────╮ ╭──────────────────────────────────────────────────────╮
+        KC_F12,   KC_F1,   KC_F2,   KC_F3,   KC_F4,   KC_F5,      KC_F6,   KC_F7,   KC_F8,   KC_F9,  KC_F10,  KC_F11,
+  // ├──────────────────────────────────────────────────────┤ ├──────────────────────────────────────────────────────┤
+       KC_MNXT, XXXXXXX, XXXXXXX, XXXXXXX, XXXXXXX, XXXXXXX,    XXXXXXX, XXXXXXX, XXXXXXX, XXXXXXX, XXXXXXX, KC_VOLU,
+  // ├──────────────────────────────────────────────────────┤ ├──────────────────────────────────────────────────────┤
+       KC_MPLY, KC_LEFT,   KC_UP, KC_DOWN, KC_RGHT, XXXXXXX,    XXXXXXX, KC_RSFT, KC_RCTL, KC_RALT, KC_RGUI, KC_MUTE,
+  // ├──────────────────────────────────────────────────────┤ ├──────────────────────────────────────────────────────┤
+       KC_MPRV, KC_HOME, KC_PGUP, KC_PGDN,  KC_END, XXXXXXX,    XXXXXXX, XXXXXXX, XXXXXXX, XXXXXXX, XXXXXXX, KC_VOLD,
+  // ╰──────────────────────────────────────────────────────┤ ├──────────────────────────────────────────────────────╯
+                                  _______, _______, XXXXXXX,    _______, XXXXXXX,
+                                           _______, _______,    XXXXXXX
+  //                            ╰───────────────────────────╯ ╰──────────────────╯
+  ),
+
+  [LAYER_POINTER] = LAYOUT_charybdis_4x6(
+  // ╭──────────────────────────────────────────────────────╮ ╭──────────────────────────────────────────────────────╮
+       XXXXXXX, XXXXXXX, XXXXXXX, XXXXXXX, XXXXXXX, XXXXXXX,    XXXXXXX, XXXXXXX, XXXXXXX, XXXXXXX, XXXXXXX, XXXXXXX,
+  // ├──────────────────────────────────────────────────────┤ ├──────────────────────────────────────────────────────┤
+       XXXXXXX, XXXXXXX, XXXXXXX, XXXXXXX, DPI_MOD, S_D_MOD,    S_D_MOD, DPI_MOD, XXXXXXX, XXXXXXX, XXXXXXX, XXXXXXX,
+  // ├──────────────────────────────────────────────────────┤ ├──────────────────────────────────────────────────────┤
+       XXXXXXX, KC_LGUI, KC_LALT, KC_LCTL, KC_LSFT, XXXXXXX,    XXXXXXX, KC_RSFT, KC_RCTL, KC_RALT, KC_RGUI, XXXXXXX,
+  // ├──────────────────────────────────────────────────────┤ ├──────────────────────────────────────────────────────┤
+       XXXXXXX, _______, DRGSCRL, SNIPING, EEP_RST,   RESET,      RESET, EEP_RST, SNIPING, DRGSCRL, _______, XXXXXXX,
+  // ╰──────────────────────────────────────────────────────┤ ├──────────────────────────────────────────────────────╯
+                                  KC_BTN2, KC_BTN1, KC_BTN3,    KC_BTN3, KC_BTN1,
+                                           XXXXXXX, KC_BTN2,    KC_BTN2
+  //                            ╰───────────────────────────╯ ╰──────────────────╯
+  ),
+};
+// clang-format on
+
+#ifdef POINTING_DEVICE_ENABLE
+#    ifdef CHARYBDIS_AUTO_POINTER_LAYER_TRIGGER_ENABLE
+report_mouse_t pointing_device_task_user(report_mouse_t mouse_report) {
+    if (abs(mouse_report.x) > CHARYBDIS_AUTO_POINTER_LAYER_TRIGGER_THRESHOLD || abs(mouse_report.y) > CHARYBDIS_AUTO_POINTER_LAYER_TRIGGER_THRESHOLD) {
+        if (auto_pointer_layer_timer == 0) {
+            layer_on(LAYER_POINTER);
+#        ifdef RGB_MATRIX_ENABLE
+            rgb_matrix_mode_noeeprom(RGB_MATRIX_NONE);
+            rgb_matrix_sethsv_noeeprom(HSV_GREEN);
+#        endif  // RGB_MATRIX_ENABLE
+        }
+        auto_pointer_layer_timer = timer_read();
+    }
+    return mouse_report;
+}
+
+void matrix_scan_kb(void) {
+    if (auto_pointer_layer_timer != 0 && TIMER_DIFF_16(timer_read(), auto_pointer_layer_timer) >= CHARYBDIS_AUTO_POINTER_LAYER_TRIGGER_TIMEOUT_MS) {
+        auto_pointer_layer_timer = 0;
+        layer_off(LAYER_POINTER);
+#        ifdef RGB_MATRIX_ENABLE
+        rgb_matrix_mode_noeeprom(RGB_MATRIX_STARTUP_MODE);
+#        endif  // RGB_MATRIX_ENABLE
+    }
+    matrix_scan_user();
+}
+#    endif  // CHARYBDIS_AUTO_POINTER_LAYER_TRIGGER_ENABLE
+
+#    ifdef CHARYBDIS_AUTO_SNIPING_ON_LAYER
+layer_state_t layer_state_set_kb(layer_state_t state) {
+    state = layer_state_set_user(state);
+    charybdis_set_pointer_sniping_enabled(layer_state_cmp(state, CHARYBDIS_AUTO_SNIPING_ON_LAYER));
+    return state;
+}
+#    endif  // CHARYBDIS_AUTO_SNIPING_ON_LAYER
+#endif      // POINTING_DEVICE_ENABLE
+
+#ifdef RGB_MATRIX_ENABLE
+// Forward-declare this helper function since it is defined in rgb_matrix.c.
+void rgb_matrix_update_pwm_buffers(void);
+#endif
+
+void shutdown_user(void) {
+#ifdef RGBLIGHT_ENABLE
+    rgblight_enable_noeeprom();
+    rgblight_mode_noeeprom(1);
+    rgblight_setrgb_red();
+#endif  // RGBLIGHT_ENABLE
+#ifdef RGB_MATRIX_ENABLE
+    rgb_matrix_set_color_all(RGB_RED);
+    rgb_matrix_update_pwm_buffers();
+#endif  // RGB_MATRIX_ENABLE
+}
diff --git a/keyboards/bastardkb/charybdis/4x6/keymaps/via/readme.md b/keyboards/bastardkb/charybdis/4x6/keymaps/via/readme.md
new file mode 100644
index 0000000000..ad2634ef0c
--- /dev/null
+++ b/keyboards/bastardkb/charybdis/4x6/keymaps/via/readme.md
@@ -0,0 +1,61 @@
+# Charybdis (4x6) `via` keymap
+
+The Charydbis (4x6) `via` keymap is inspired from the original [Dactyl Manuform](../../../../../handwired/dactyl_manuform) default keymap, with some features and changes specific to the Charybdis.
+
+This layout supports RGB matrix. However, due to space constraints on the MCU, only a limited number of effect can be enabled at once. Look at the `config.h` file and enable your favorite effect.
+
+## Customizing the keymap
+
+### Dynamic DPI scaling
+
+Use the following keycodes to change the default DPI:
+
+-   `POINTER_DEFAULT_DPI_FORWARD`: increases the DPI; decreases when shifted;
+-   `POINTER_DEFAULT_DPI_REVERSE`: decreases the DPI; increases when shifted.
+
+There's a maximum of 16 possible values for the sniping mode DPI. See the [Charybdis documentation](../../README.md) for more information.
+
+Use the following keycodes to change the sniping mode DPI:
+
+-   `POINTER_SNIPING_DPI_FORWARD`: increases the DPI; decreases when shifted;
+-   `POINTER_SNIPING_DPI_REVERSE`: decreases the DPI; increases when shifted.
+
+There's a maximum of 4 possible values for the sniping mode DPI. See the [Charybdis documentation](../../README.md) for more information.
+
+### Drag-scroll
+
+Use the `DRAGSCROLL_MODE` keycode to enable drag-scroll on hold. Use the `DRAGSCROLL_TOGGLE` keycode to enable/disable drag-scroll on key press.
+
+### Sniping
+
+Use the `SNIPING_MODE` keycode to enable sniping mode on hold. Use the `SNIPING_TOGGLE` keycode to enable/disable sniping mode on key press.
+
+Change the value of `CHARYBDIS_AUTO_SNIPING_ON_LAYER` to automatically enable sniping mode on layer change. By default, sniping mode is enabled on the pointer layer:
+
+```c
+#define CHARYBDIS_AUTO_SNIPING_ON_LAYER LAYER_POINTER
+```
+
+### Auto pointer layer
+
+The pointer layer can be automatically enabled when moving the trackball. To enable or disable this behavior, add or remove the following define:
+
+```c
+#define CHARYBDIS_AUTO_POINTER_LAYER_TRIGGER_ENABLE
+```
+
+By default, the layer is turned off 1 second after the last registered trackball movement:
+
+```c
+#define CHARYBDIS_AUTO_POINTER_LAYER_TRIGGER_TIMEOUT_MS 1000
+```
+
+The trigger sensibility can also be tuned. The lower the value, the more sensible the trigger:
+
+```c
+#define CHARYBDIS_AUTO_POINTER_LAYER_TRIGGER_THRESHOLD 8
+```
+
+## Layout
+
+![Keymap layout (generated with keyboard-layout-editor.com)](https://i.imgur.com/qI7phR7.png)
diff --git a/keyboards/bastardkb/charybdis/4x6/keymaps/via/rules.mk b/keyboards/bastardkb/charybdis/4x6/keymaps/via/rules.mk
new file mode 100644
index 0000000000..1e5b99807c
--- /dev/null
+++ b/keyboards/bastardkb/charybdis/4x6/keymaps/via/rules.mk
@@ -0,0 +1 @@
+VIA_ENABLE = yes
diff --git a/keyboards/bastardkb/charybdis/4x6/readme.md b/keyboards/bastardkb/charybdis/4x6/readme.md
new file mode 100644
index 0000000000..af2396cd6d
--- /dev/null
+++ b/keyboards/bastardkb/charybdis/4x6/readme.md
@@ -0,0 +1,15 @@
+# Charybdis (4x6)
+
+An ergonomic keyboard with integrated trackball.
+
+The Charybdis is available in 4x6 and 3x5 form factor at [bastardkb.com](https://bastardkb.com).
+
+## Keymaps
+
+### [`default`](keymaps/default)
+
+A simple QWERTY layout with 3 layers.
+
+### [`via`](keymaps/via)
+
+Same as the [default](keymaps/default) keymap, but with VIA support.
diff --git a/keyboards/bastardkb/charybdis/4x6/rules.mk b/keyboards/bastardkb/charybdis/4x6/rules.mk
new file mode 100644
index 0000000000..e137f5d4cc
--- /dev/null
+++ b/keyboards/bastardkb/charybdis/4x6/rules.mk
@@ -0,0 +1,37 @@
+# MCU name
+MCU = atmega32u4
+
+# Bootloader selection
+BOOTLOADER = atmel-dfu
+
+# Build Options
+#   change yes to no to disable
+#
+BOOTMAGIC_ENABLE = yes      # Enable Bootmagic Lite
+MOUSEKEY_ENABLE = no        # Mouse keys
+EXTRAKEY_ENABLE = yes       # Audio control and System control
+CONSOLE_ENABLE = no         # Console for debug
+COMMAND_ENABLE = no         # Commands for debug and configuration
+NKRO_ENABLE = no            # Enable N-Key Rollover
+BACKLIGHT_ENABLE = no       # Enable keyboard backlight functionality
+RGBLIGHT_ENABLE = no        # Enable keyboard RGB underglow
+AUDIO_ENABLE = no           # Audio output
+
+AUDIO_SUPPORTED = no        # Audio is not supported.
+RGB_MATRIX_SUPPORTED = yes  # RGB matrix is supported and enabled by default.
+RGBLIGHT_SUPPORTED = yes    # RGB underglow is supported, but not enabled by default.
+RGB_MATRIX_ENABLE = yes     # Enable keyboard RGB matrix functionality
+RGB_MATRIX_DRIVER = WS2812
+
+# Enable link-time optimization by default.  The Charybdis packs a lot of
+# features (RGB, Via, trackball) in a small atmega32u4 package.
+LTO_ENABLE = yes
+
+# Charybdis is a split 4x6 keyboard with a maximum of 5 thumb keys (3 on the
+# trackball side).
+SPLIT_KEYBOARD = yes
+
+POINTING_DEVICE_ENABLE = yes # Enable trackball
+POINTING_DEVICE_DRIVER = pmw3360
+# https://qmk.fm/changes/2018-11-16-use-a-single-endpoint-for-hid-reports
+MOUSE_SHARED_EP = no # Unify multiple HID interfaces into a single Endpoint
diff --git a/keyboards/bastardkb/charybdis/charybdis.c b/keyboards/bastardkb/charybdis/charybdis.c
new file mode 100644
index 0000000000..f94682ba41
--- /dev/null
+++ b/keyboards/bastardkb/charybdis/charybdis.c
@@ -0,0 +1,343 @@
+/*
+ * Copyright 2020 Christopher Courtney <drashna@live.com> (@drashna)
+ * Copyright 2021 Quentin LEBASTARD <qlebastard@gmail.com>
+ * Copyright 2021 Charly Delay <charly@codesink.dev> (@0xcharly)
+ *
+ * This program is free software: you can redistribute it and/or modify
+ * it under the terms of the GNU General Publicw 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 "charybdis.h"
+
+#ifdef CONSOLE_ENABLE
+#    include "print.h"
+#endif  // CONSOLE_ENABLE
+
+#ifdef POINTING_DEVICE_ENABLE
+#    ifndef CHARYBDIS_MINIMUM_DEFAULT_DPI
+#        define CHARYBDIS_MINIMUM_DEFAULT_DPI 400
+#    endif  // CHARYBDIS_MINIMUM_DEFAULT_DPI
+
+#    ifndef CHARYBDIS_DEFAULT_DPI_CONFIG_STEP
+#        define CHARYBDIS_DEFAULT_DPI_CONFIG_STEP 200
+#    endif  // CHARYBDIS_DEFAULT_DPI_CONFIG_STEP
+
+#    ifndef CHARYBDIS_MINIMUM_SNIPING_DPI
+#        define CHARYBDIS_MINIMUM_SNIPING_DPI 200
+#    endif  // CHARYBDIS_MINIMUM_SNIPER_MODE_DPI
+
+#    ifndef CHARYBDIS_SNIPING_DPI_CONFIG_STEP
+#        define CHARYBDIS_SNIPING_DPI_CONFIG_STEP 100
+#    endif  // CHARYBDIS_SNIPING_DPI_CONFIG_STEP
+
+// Fixed DPI for drag-scroll.
+#    ifndef CHARYBDIS_DRAGSCROLL_DPI
+#        define CHARYBDIS_DRAGSCROLL_DPI 100
+#    endif  // CHARYBDIS_DRAGSCROLL_DPI
+
+#    ifndef CHARYBDIS_DRAGSCROLL_BUFFER_SIZE
+#        define CHARYBDIS_DRAGSCROLL_BUFFER_SIZE 6
+#    endif  // !CHARYBDIS_DRAGSCROLL_BUFFER_SIZE
+
+#    ifndef CHARYBDIS_POINTER_ACCELERATION_FACTOR
+#        define CHARYBDIS_POINTER_ACCELERATION_FACTOR 24
+#    endif  // !CHARYBDIS_POINTER_ACCELERATION_FACTOR
+
+typedef union {
+    uint8_t raw;
+    struct {
+        uint8_t pointer_default_dpi : 4;  // 16 steps available.
+        uint8_t pointer_sniping_dpi : 2;  // 4 steps available.
+        bool    is_dragscroll_enabled : 1;
+        bool    is_sniping_enabled : 1;
+    } __attribute__((packed));
+} charybdis_config_t;
+
+static charybdis_config_t g_charybdis_config = {0};
+
+/**
+ * \brief Set the value of `config` from EEPROM.
+ *
+ * Note that `is_dragscroll_enabled` and `is_sniping_enabled` are purposefully
+ * ignored since we do not want to persist this state to memory.  In practice,
+ * this state is always written to maximize write-performances.  Therefore, we
+ * explicitly set them to `false` in this function.
+ */
+static void read_charybdis_config_from_eeprom(charybdis_config_t* config) {
+    config->raw                   = eeconfig_read_kb() & 0xff;
+    config->is_dragscroll_enabled = false;
+    config->is_sniping_enabled    = false;
+}
+
+/**
+ * \brief Save the value of `config` to eeprom.
+ *
+ * Note that all values are written verbatim, including whether drag-scroll
+ * and/or sniper mode are enabled.  `read_charybdis_config_from_eeprom(…)`
+ * resets these 2 values to `false` since it does not make sense to persist
+ * these across reboots of the board.
+ */
+static void write_charybdis_config_to_eeprom(charybdis_config_t* config) { eeconfig_update_kb(config->raw); }
+
+/** \brief Return the current value of the pointer's default DPI. */
+static uint16_t get_pointer_default_dpi(charybdis_config_t* config) { return (uint16_t)config->pointer_default_dpi * CHARYBDIS_DEFAULT_DPI_CONFIG_STEP + CHARYBDIS_MINIMUM_DEFAULT_DPI; }
+
+/** \brief Return the current value of the pointer's sniper-mode DPI. */
+static uint16_t get_pointer_sniping_dpi(charybdis_config_t* config) { return (uint16_t)config->pointer_sniping_dpi * CHARYBDIS_SNIPING_DPI_CONFIG_STEP + CHARYBDIS_MINIMUM_SNIPING_DPI; }
+
+/** \brief Set the appropriate DPI for the input config. */
+static void maybe_update_pointing_device_cpi(charybdis_config_t* config) {
+    if (config->is_dragscroll_enabled) {
+        pointing_device_set_cpi(CHARYBDIS_DRAGSCROLL_DPI);
+    } else if (config->is_sniping_enabled) {
+        pointing_device_set_cpi(get_pointer_sniping_dpi(config));
+    } else {
+        pointing_device_set_cpi(get_pointer_default_dpi(config));
+    }
+}
+
+/**
+ * \brief Update the pointer's default DPI to the next or previous step.
+ *
+ * Increases the DPI value if `forward` is `true`, decreases it otherwise.
+ * The increment/decrement steps are equal to CHARYBDIS_DEFAULT_DPI_CONFIG_STEP.
+ */
+static void step_pointer_default_dpi(charybdis_config_t* config, bool forward) {
+    config->pointer_default_dpi += forward ? 1 : -1;
+    maybe_update_pointing_device_cpi(config);
+}
+
+/**
+ * \brief Update the pointer's sniper-mode DPI to the next or previous step.
+ *
+ * Increases the DPI value if `forward` is `true`, decreases it otherwise.
+ * The increment/decrement steps are equal to CHARYBDIS_SNIPING_DPI_CONFIG_STEP.
+ */
+static void step_pointer_sniping_dpi(charybdis_config_t* config, bool forward) {
+    config->pointer_sniping_dpi += forward ? 1 : -1;
+    maybe_update_pointing_device_cpi(config);
+}
+
+uint16_t charybdis_get_pointer_default_dpi(void) { return get_pointer_default_dpi(&g_charybdis_config); }
+
+uint16_t charybdis_get_pointer_sniping_dpi(void) { return get_pointer_sniping_dpi(&g_charybdis_config); }
+
+void charybdis_cycle_pointer_default_dpi_noeeprom(bool forward) { step_pointer_default_dpi(&g_charybdis_config, forward); }
+
+void charybdis_cycle_pointer_default_dpi(bool forward) {
+    step_pointer_default_dpi(&g_charybdis_config, forward);
+    write_charybdis_config_to_eeprom(&g_charybdis_config);
+}
+
+void charybdis_cycle_pointer_sniping_dpi_noeeprom(bool forward) { step_pointer_sniping_dpi(&g_charybdis_config, forward); }
+
+void charybdis_cycle_pointer_sniping_dpi(bool forward) {
+    step_pointer_sniping_dpi(&g_charybdis_config, forward);
+    write_charybdis_config_to_eeprom(&g_charybdis_config);
+}
+
+bool charybdis_get_pointer_sniping_enabled(void) { return g_charybdis_config.is_sniping_enabled; }
+
+void charybdis_set_pointer_sniping_enabled(bool enable) {
+    g_charybdis_config.is_sniping_enabled = enable;
+    maybe_update_pointing_device_cpi(&g_charybdis_config);
+}
+
+bool charybdis_get_pointer_dragscroll_enabled(void) { return g_charybdis_config.is_dragscroll_enabled; }
+
+void charybdis_set_pointer_dragscroll_enabled(bool enable) {
+    g_charybdis_config.is_dragscroll_enabled = enable;
+    maybe_update_pointing_device_cpi(&g_charybdis_config);
+}
+
+void pointing_device_init_kb(void) { maybe_update_pointing_device_cpi(&g_charybdis_config); }
+
+#    ifndef CONSTRAIN_HID
+#        define CONSTRAIN_HID(value) ((value) < -127 ? -127 : ((value) > 127 ? 127 : (value)))
+#    endif  // !CONSTRAIN_HID
+
+/**
+ * \brief Add optional acceleration effect.
+ *
+ * If `CHARYBDIS_ENABLE_POINTER_ACCELERATION` is defined, add a simple and naive
+ * acceleration effect to the provided value.  Return the value unchanged
+ * otherwise.
+ */
+#    ifndef DISPLACEMENT_WITH_ACCELERATION
+#        ifdef CHARYBDIS_POINTER_ACCELERATION_ENABLE
+#            define DISPLACEMENT_WITH_ACCELERATION(d) (CONSTRAIN_HID(d > 0 ? d * d / CHARYBDIS_POINTER_ACCELERATION_FACTOR + d : -d * d / CHARYBDIS_POINTER_ACCELERATION_FACTOR + d))
+#        else  // !CHARYBDIS_POINTER_ACCELERATION_ENABLE
+#            define DISPLACEMENT_WITH_ACCELERATION(d) (d)
+#        endif  // CHARYBDIS_POINTER_ACCELERATION_ENABLE
+#    endif      // !DISPLACEMENT_WITH_ACCELERATION
+
+/**
+ * \brief Augment the pointing device behavior.
+ *
+ * Implement the Charybdis-specific features for pointing devices:
+ *   - Drag-scroll
+ *   - Sniping
+ *   - Acceleration
+ */
+static void pointing_device_task_charybdis(report_mouse_t* mouse_report) {
+    static int16_t scroll_buffer_x = 0;
+    static int16_t scroll_buffer_y = 0;
+    if (g_charybdis_config.is_dragscroll_enabled) {
+#    ifdef CHARYBDIS_DRAGSCROLL_REVERSE_X
+        scroll_buffer_x -= mouse_report->x;
+#    else
+        scroll_buffer_x += mouse_report->x;
+#    endif  // CHARYBDIS_DRAGSCROLL_REVERSE_X
+#    ifdef CHARYBDIS_DRAGSCROLL_REVERSE_Y
+        scroll_buffer_y -= mouse_report->y;
+#    else
+        scroll_buffer_y += mouse_report->y;
+#    endif  // CHARYBDIS_DRAGSCROLL_REVERSE_Y
+        mouse_report->x = 0;
+        mouse_report->y = 0;
+        if (abs(scroll_buffer_x) > CHARYBDIS_DRAGSCROLL_BUFFER_SIZE) {
+            mouse_report->h = scroll_buffer_x > 0 ? 1 : -1;
+            scroll_buffer_x = 0;
+        }
+        if (abs(scroll_buffer_y) > CHARYBDIS_DRAGSCROLL_BUFFER_SIZE) {
+            mouse_report->v = scroll_buffer_y > 0 ? 1 : -1;
+            scroll_buffer_y = 0;
+        }
+    } else if (!g_charybdis_config.is_sniping_enabled) {
+        mouse_report->x = DISPLACEMENT_WITH_ACCELERATION(mouse_report->x);
+        mouse_report->y = DISPLACEMENT_WITH_ACCELERATION(mouse_report->y);
+    }
+}
+
+report_mouse_t pointing_device_task_kb(report_mouse_t mouse_report) {
+    if (is_keyboard_master()) {
+        pointing_device_task_charybdis(&mouse_report);
+        mouse_report = pointing_device_task_user(mouse_report);
+    }
+    return mouse_report;
+}
+
+#    if defined(POINTING_DEVICE_ENABLE) && !defined(NO_CHARYBDIS_KEYCODES)
+/** \brief Whether SHIFT mod is enabled. */
+static bool has_shift_mod(void) {
+#        ifdef NO_ACTION_ONESHOT
+    return mod_config(get_mods()) & MOD_MASK_SHIFT;
+#        else
+    return mod_config(get_mods() | get_oneshot_mods()) & MOD_MASK_SHIFT;
+#        endif  // NO_ACTION_ONESHOT
+}
+#    endif  // POINTING_DEVICE_ENABLE && !NO_CHARYBDIS_KEYCODES
+
+/**
+ * \brief Outputs the Charybdis configuration to console.
+ *
+ * Prints the in-memory configuration structure to console, for debugging.
+ * Includes:
+ *   - raw value
+ *   - drag-scroll: on/off
+ *   - sniping: on/off
+ *   - default DPI: internal table index/actual DPI
+ *   - sniping DPI: internal table index/actual DPI
+ */
+static void debug_charybdis_config_to_console(charybdis_config_t* config) {
+#    ifdef CONSOLE_ENABLE
+    dprintf("(charybdis) process_record_kb: config = {\n"
+            "\traw = 0x%04X,\n"
+            "\t{\n"
+            "\t\tis_dragscroll_enabled=%b\n"
+            "\t\tis_sniping_enabled=%b\n"
+            "\t\tdefault_dpi=0x%02X (%ld)\n"
+            "\t\tsniping_dpi=0x%01X (%ld)\n"
+            "\t}\n"
+            "}\n",
+            config->raw, config->is_dragscroll_enabled, config->is_sniping_enabled, config->pointer_default_dpi, get_pointer_default_dpi(config), config->pointer_sniping_dpi, get_pointer_sniping_dpi(config));
+#    endif  // CONSOLE_ENABLE
+}
+
+bool process_record_kb(uint16_t keycode, keyrecord_t* record) {
+    if (!process_record_user(keycode, record)) {
+        debug_charybdis_config_to_console(&g_charybdis_config);
+        return false;
+    }
+#    ifdef POINTING_DEVICE_ENABLE
+#        ifndef NO_CHARYBDIS_KEYCODES
+    switch (keycode) {
+        case POINTER_DEFAULT_DPI_FORWARD:
+            if (record->event.pressed) {
+                // Step backward if shifted, forward otherwise.
+                charybdis_cycle_pointer_default_dpi(/* forward= */ !has_shift_mod());
+            }
+            break;
+        case POINTER_DEFAULT_DPI_REVERSE:
+            if (record->event.pressed) {
+                // Step forward if shifted, backward otherwise.
+                charybdis_cycle_pointer_default_dpi(/* forward= */ has_shift_mod());
+            }
+            break;
+        case POINTER_SNIPING_DPI_FORWARD:
+            if (record->event.pressed) {
+                // Step backward if shifted, forward otherwise.
+                charybdis_cycle_pointer_sniping_dpi(/* forward= */ !has_shift_mod());
+            }
+            break;
+        case POINTER_SNIPING_DPI_REVERSE:
+            if (record->event.pressed) {
+                // Step forward if shifted, backward otherwise.
+                charybdis_cycle_pointer_sniping_dpi(/* forward= */ has_shift_mod());
+            }
+            break;
+        case SNIPING_MODE:
+            charybdis_set_pointer_sniping_enabled(record->event.pressed);
+            break;
+        case SNIPING_MODE_TOGGLE:
+            if (record->event.pressed) {
+                charybdis_set_pointer_sniping_enabled(!charybdis_get_pointer_sniping_enabled());
+            }
+            break;
+        case DRAGSCROLL_MODE:
+            charybdis_set_pointer_dragscroll_enabled(record->event.pressed);
+            break;
+        case DRAGSCROLL_MODE_TOGGLE:
+            if (record->event.pressed) {
+                charybdis_set_pointer_dragscroll_enabled(!charybdis_get_pointer_dragscroll_enabled());
+            }
+            break;
+    }
+#        endif  // !NO_CHARYBDIS_KEYCODES
+#        ifndef MOUSEKEY_ENABLE
+    // Simulate mouse keys if full support is not enabled (reduces firmware size
+    // while maintaining support for mouse keys).
+    if (IS_MOUSEKEY_BUTTON(keycode)) {
+        report_mouse_t mouse_report = pointing_device_get_report();
+        mouse_report.buttons        = pointing_device_handle_buttons(mouse_report.buttons, record->event.pressed, keycode - KC_MS_BTN1);
+        pointing_device_set_report(mouse_report);
+        pointing_device_send();
+    }
+#        endif  // !MOUSEKEY_ENABLE
+#    endif      // POINTING_DEVICE_ENABLE
+    debug_charybdis_config_to_console(&g_charybdis_config);
+    return true;
+}
+
+void eeconfig_init_kb(void) {
+    g_charybdis_config.raw = 0;
+    write_charybdis_config_to_eeprom(&g_charybdis_config);
+    maybe_update_pointing_device_cpi(&g_charybdis_config);
+    eeconfig_init_user();
+}
+
+void matrix_init_kb(void) {
+    read_charybdis_config_from_eeprom(&g_charybdis_config);
+    matrix_init_user();
+}
+#endif  // POINTING_DEVICE_ENABLE
diff --git a/keyboards/bastardkb/charybdis/charybdis.h b/keyboards/bastardkb/charybdis/charybdis.h
new file mode 100644
index 0000000000..42423c0c92
--- /dev/null
+++ b/keyboards/bastardkb/charybdis/charybdis.h
@@ -0,0 +1,126 @@
+/*
+ * Copyright 2021 Quentin LEBASTARD <qlebastard@gmail.com>
+ * Copyright 2021 Charly Delay <charly@codesink.dev> (@0xcharly)
+ *
+ * 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
+
+// clang-format off
+#if defined(KEYBOARD_bastardkb_charybdis_3x5)
+#    include "3x5.h"
+#elif defined(KEYBOARD_bastardkb_charybdis_4x6)
+#    include "4x6.h"
+#else
+#    error "Unsuported format"
+#endif
+// clang-format on
+
+#include "quantum.h"
+
+#ifdef POINTING_DEVICE_ENABLE
+#    ifndef NO_CHARYBDIS_KEYCODES
+enum charybdis_keycodes {
+#        ifdef VIA_ENABLE
+    POINTER_DEFAULT_DPI_FORWARD = USER00,
+#        else
+    POINTER_DEFAULT_DPI_FORWARD = SAFE_RANGE,
+#        endif  // VIA_ENABLE
+    POINTER_DEFAULT_DPI_REVERSE,
+    POINTER_SNIPING_DPI_FORWARD,
+    POINTER_SNIPING_DPI_REVERSE,
+    SNIPING_MODE,
+    SNIPING_MODE_TOGGLE,
+    DRAGSCROLL_MODE,
+    DRAGSCROLL_MODE_TOGGLE,
+    CHARYBDIS_SAFE_RANGE,
+};
+
+#        define DPI_MOD POINTER_DEFAULT_DPI_FORWARD
+#        define DPI_RMOD POINTER_DEFAULT_DPI_REVERSE
+#        define S_D_MOD POINTER_SNIPING_DPI_FORWARD
+#        define S_D_RMOD POINTER_SNIPING_DPI_REVERSE
+#        define SNIPING SNIPING_MODE
+#        define SNP_TOG SNIPING_MODE_TOGGLE
+#        define DRGSCRL DRAGSCROLL_MODE
+#        define DRG_TOG DRAGSCROLL_MODE_TOGGLE
+#    endif  // !NO_CHARYBDIS_KEYCODES
+
+/** \brief Return the current DPI value for the pointer's default mode. */
+uint16_t charybdis_get_pointer_default_dpi(void);
+
+/**
+ * \brief Update the pointer's default DPI to the next or previous step.
+ *
+ * Increases the DPI value if `forward` is `true`, decreases it otherwise.
+ * The increment/decrement steps are equal to CHARYBDIS_DEFAULT_DPI_CONFIG_STEP.
+ *
+ * The new value is persisted in EEPROM.
+ */
+void charybdis_cycle_pointer_default_dpi(bool forward);
+
+/**
+ * \brief Same as `charybdis_cycle_pointer_default_dpi`, but do not write to
+ * EEPROM.
+ *
+ * This means that reseting the board will revert the value to the last
+ * persisted one.
+ */
+void charybdis_cycle_pointer_default_dpi_noeeprom(bool forward);
+
+/** \brief Return the current DPI value for the pointer's sniper-mode. */
+uint16_t charybdis_get_pointer_sniping_dpi(void);
+
+/**
+ * \brief Update the pointer's sniper-mode DPI to the next or previous step.
+ *
+ * Increases the DPI value if `forward` is `true`, decreases it otherwise.
+ * The increment/decrement steps are equal to CHARYBDIS_SNIPING_DPI_CONFIG_STEP.
+ *
+ * The new value is persisted in EEPROM.
+ */
+void charybdis_cycle_pointer_sniping_dpi(bool forward);
+
+/**
+ * \brief Same as `charybdis_cycle_pointer_sniping_dpi`, but do not write to
+ * EEPROM.
+ *
+ * This means that reseting the board will revert the value to the last
+ * persisted one.
+ */
+void charybdis_cycle_pointer_sniping_dpi_noeeprom(bool forward);
+
+/** \brief Whether sniper-mode is enabled. */
+bool charybdis_get_pointer_sniping_enabled(void);
+
+/**
+ * \brief Enable/disable sniper mode.
+ *
+ * When sniper mode is enabled the dpi is reduced to slow down the pointer for
+ * more accurate movements.
+ */
+void charybdis_set_pointer_sniping_enabled(bool enable);
+
+/** \brief Whether drag-scroll is enabled. */
+bool charybdis_get_pointer_dragscroll_enabled(void);
+
+/**
+ * \brief Enable/disable drag-scroll mode.
+ *
+ * When drag-scroll mode is enabled, horizontal and vertical pointer movements
+ * are translated into horizontal and vertical scroll movements.
+ */
+void charybdis_set_pointer_dragscroll_enabled(bool enable);
+#endif  // POINTING_DEVICE_ENABLE
diff --git a/keyboards/bastardkb/charybdis/config.h b/keyboards/bastardkb/charybdis/config.h
new file mode 100644
index 0000000000..c88451335e
--- /dev/null
+++ b/keyboards/bastardkb/charybdis/config.h
@@ -0,0 +1,35 @@
+/*
+ * Copyright 2021 Quentin LEBASTARD <qlebastard@gmail.com>
+ * Copyright 2021 Charly Delay <charly@codesink.dev> (@0xcharly)
+ *
+ * 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"
+
+/* Pointing device configuration. */
+
+// Enable use of pointing device on slave split.
+#define SPLIT_POINTING_ENABLE
+
+// Pointing device is on the right split.
+#define POINTING_DEVICE_RIGHT
+
+// Limits the frequency that the sensor is polled for motion.
+#define POINTING_DEVICE_TASK_THROTTLE_MS 1
+
+/** \brief Invert X axis on mouse reports. */
+#define POINTING_DEVICE_INVERT_X
diff --git a/keyboards/bastardkb/charybdis/post_config.h b/keyboards/bastardkb/charybdis/post_config.h
new file mode 100644
index 0000000000..540751f6c6
--- /dev/null
+++ b/keyboards/bastardkb/charybdis/post_config.h
@@ -0,0 +1,109 @@
+/*
+ * Copyright 2012 Jun Wako <wakojun@gmail.com>
+ * Copyright 2015 Jack Humbert
+ * Copyright 2021 Quentin LEBASTARD <qlebastard@gmail.com>
+ * Copyright 2021 Charly Delay <charly@codesink.dev> (@0xcharly)
+ *
+ * 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
+
+/* Mouse config. */
+
+#ifndef MOUSEKEY_MOVE_DELTA
+#    ifndef MK_KINETIC_SPEED
+#        define MOUSEKEY_MOVE_DELTA 5
+#    else  // MK_KINETIC_SPEED
+#        define MOUSEKEY_MOVE_DELTA 25
+#    endif  // !MK_KINETIC_SPEED
+#endif      // !MOUSEKEY_MOVE_DELTA
+
+#ifndef MOUSEKEY_DELAY
+#    ifndef MK_KINETIC_SPEED
+#        define MOUSEKEY_DELAY 300
+#    else  // MK_KINETIC_SPEED
+#        define MOUSEKEY_DELAY 8
+#    endif  // !MK_KINETIC_SPEED
+#endif      // !MOUSEKEY_DELAY
+
+#ifndef MOUSEKEY_INTERVAL
+#    ifndef MK_KINETIC_SPEED
+#        define MOUSEKEY_INTERVAL 50
+#    else  // MK_KINETIC_SPEED
+#        define MOUSEKEY_INTERVAL 20
+#    endif  // !MK_KINETIC_SPEED
+#endif      // !MOUSEKEY_INTERNAL
+
+#ifndef MOUSEKEY_MAX_SPEED
+#    define MOUSEKEY_MAX_SPEED 7
+#endif  // !MOUSEKEY_MAX_SPEED
+
+#ifndef MOUSEKEY_TIME_TO_MAX
+#    define MOUSEKEY_TIME_TO_MAX 60
+#endif  // !MOUSEKEY_TIME_TO_MAX
+
+#ifndef MOUSEKEY_INITIAL_SPEED
+#    define MOUSEKEY_INITIAL_SPEED 100
+#endif  // !MOUSEKEY_INITIAL_SPEED
+
+#ifndef MOUSEKEY_BASE_SPEED
+#    define MOUSEKEY_BASE_SPEED 1000
+#endif  // !MOUSEKEY_BASE_SPEED
+
+#ifndef MOUSEKEY_DECELERATED_SPEED
+#    define MOUSEKEY_DECELERATED_SPEED 400
+#endif  // !MOUSEKEY_DECELERATED_SPEED
+
+#ifndef MOUSEKEY_ACCELERATED_SPEED
+#    define MOUSEKEY_ACCELERATED_SPEED 3000
+#endif  // !MOUSEKEY_ACCELERATED_SPEED
+
+/* Mouse scroll config. */
+
+#ifndef MOUSEKEY_WHEEL_DELAY
+#    define MOUSEKEY_WHEEL_DELAY 15
+#endif  // !MOUSEKEY_WHEEL_DELAY
+
+#ifndef MOUSEKEY_WHEEL_DELTA
+#    define MOUSEKEY_WHEEL_DELTA 1
+#endif  // !MOUSEKEY_WHEEL_DELTA
+
+#ifndef MOUSEKEY_WHEEL_INTERVAL
+#    define MOUSEKEY_WHEEL_INTERVAL 50
+#endif  // !MOUSEKEY_WHEEL_INTERVAL
+
+#ifndef MOUSEKEY_WHEEL_MAX_SPEED
+#    define MOUSEKEY_WHEEL_MAX_SPEED 8
+#endif  // !MOUSEKEY_WHEEL_MAX_SPEED
+
+#ifndef MOUSEKEY_WHEEL_TIME_TO_MAX
+#    define MOUSEKEY_WHEEL_TIME_TO_MAX 80
+#endif  // !MOUSEKEY_WHEEL_TIME_TO_MAX
+
+#ifndef MOUSEKEY_WHEEL_INITIAL_MOVEMENTS
+#    define MOUSEKEY_WHEEL_INITIAL_MOVEMENTS 8
+#endif  // !MOUSEKEY_WHEEL_INITIAL_MOVEMENTS
+
+#ifndef MOUSEKEY_WHEEL_BASE_MOVEMENTS
+#    define MOUSEKEY_WHEEL_BASE_MOVEMENTS 48
+#endif  // !MOUSEKEY_WHEEL_BASE_MOVEMENTS
+
+#ifndef MOUSEKEY_WHEEL_ACCELERATED_MOVEMENTS
+#    define MOUSEKEY_WHEEL_ACCELERATED_MOVEMENTS 48
+#endif  // !MOUSEKEY_WHEEL_ACCELERATED_MOVEMENTS
+
+#ifndef MOUSEKEY_WHEEL_DECELERATED_MOVEMENTS
+#    define MOUSEKEY_WHEEL_DECELERATED_MOVEMENTS 8
+#endif  // !MOUSEKEY_WHEEL_DECELERATED_MOVEMENTS
diff --git a/keyboards/bastardkb/charybdis/readme.md b/keyboards/bastardkb/charybdis/readme.md
new file mode 100644
index 0000000000..461f33117c
--- /dev/null
+++ b/keyboards/bastardkb/charybdis/readme.md
@@ -0,0 +1,178 @@
+# Charybdis (6x4, 5x3 "Nano")
+
+An ergonomic keyboard with integrated trackball.
+
+Engineered to be a full mouse replacement solution with high-quality, custom-developed components.
+
+There are 6x4 and 5x3 "Nano" versions.
+
+-   Keyboard Maintainer: [Bastard Keyboards](https://github.com/Bastardkb)
+-   Hardware Supported: elite-C V4
+-   Hardware Availability: [Bastard Keyboards](https://bastardkb.com)
+
+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 the [Complete Newbs Guide](https://docs.qmk.fm/#/newbs).
+
+Check out the [keyboard build guides](https://docs.bastardkb.com) for the Charybdis and other ergonomic keyboards.
+
+## Building the firmware
+
+### Charybdis (4x6)
+
+The `default` keymap is inspired from the original [Dactyl Manuform](../../handwired/dactyl_manuform) layout.
+
+```shell
+qmk compile -kb bastardkb/charybdis/4x6 -km default
+```
+
+Check out the `via` layout if you're looking for VIA support:
+
+```shell
+qmk compile -kb bastardkb/charybdis/4x6 -km via
+```
+
+### Charybdis (3x5)
+
+The `default` keymap is inspired from the original [Dactyl Manuform](../../handwired/dactyl_manuform) layout.
+
+```shell
+qmk compile -kb bastardkb/charybdis/3x5 -km default
+```
+
+Check out the `via` layout if you're looking for VIA support:
+
+```shell
+qmk compile -kb bastardkb/charybdis/3x5 -km via
+```
+
+## Customizing the firmware
+
+### Dynamic DPI scaling
+
+The pointer's DPI can be changed at runtime.
+
+By default, the DPI is set to `400`. The Charybdis supports up to 16 different DPI values. By default, it cycles between `400` and `3400`, with a step of `200` (_ie._ `400`, `600`, `800`, …, `3400`).
+
+Calling `charybdis_cycle_pointer_default_dpi(bool forward)` will cycle forward or backward the possible values.
+
+Use `charybdis_cycle_pointer_default_dpi_noeeprom(bool forward)` to change the DPI value without persisting the change to EEPROM (_ie._ resetting the board will revert to the last saved value).
+
+`charybdis_get_pointer_default_dpi()` returns the current DPI value.
+
+This behavior can be further customized with the following defines:
+
+```c
+#define CHARYBDIS_MINIMUM_DEFAULT_DPI 400
+#define CHARYBDIS_DEFAULT_DPI_CONFIG_STEP 200
+```
+
+### Drag-scroll
+
+Drag-scroll enables scrolling with the trackball. When drag-scroll is enabled, the trackball's `x` and `y` movements are converted into `h` (horizontal) and `v` (vertical) movement, effectively sending scroll instructions to the host system.
+
+Call `charybdis_set_pointer_dragscroll_enabled(bool enable)` to enable/disable drag-scroll.
+
+`charybdis_get_pointer_dragscroll_enabled()` returns whether sniping mode is currently enabled.
+
+To invert the horizontal scrolling direction, define `CHARYBDIS_DRAGSCROLL_REVERSE_X`:
+
+```c
+#define CHARYBDIS_DRAGSCROLL_REVERSE_X
+```
+
+To invert the vertical scrolling direction (_ie._ mimic macOS "natural" scroll direction), define `CHARYBDIS_DRAGSCROLL_REVERSE_Y`:
+
+```c
+#define CHARYBDIS_DRAGSCROLL_REVERSE_Y
+```
+
+This only affects the vertical scroll direction.
+
+### Sniping mode
+
+Sniping mode slows down the pointer for more precise gestures. It is useful when combined with a higher default DPI.
+
+Call `charybdis_set_pointer_sniping_enabled(bool enable)` to enable/disable sniping mode.
+
+`charybdis_get_pointer_sniping_enabled()` returns whether sniping mode is currently enabled.
+
+Like the default pointer's DPI, the sniper mode DPI can be changed at runtime.
+
+By default, sniping mode lowers the DPI to `200`. This can be changed at runtime: the Charybdis supports up to 4 different DPI values for sniping mode. By default, it cycles between `200`, `300`, `400` and `500`.
+
+Calling `charybdis_cycle_pointer_sniping_dpi(bool forward)` will cycle forward or backward the possible values.
+
+Use `charybdis_cycle_pointer_sniping_dpi_noeeprom(bool forward)` to change the sniping mode DPI value without persisting the change to EEPROM (_ie._ resetting the board will revert to the last saved value).
+
+`charybdis_get_pointer_sniping_dpi()` returns the current sniping mode DPI value.
+
+This behavior can be further customized with the following defines:
+
+```c
+#define CHARYBDIS_MINIMUM_SNIPING_DPI 200
+#define CHARYBDIS_SNIPING_DPI_CONFIG_STEP 100
+```
+
+### Acceleration
+
+By default, the pointer's movements are linear. To enable acceleration, add the following define:
+
+```c
+#define CHARYBDIS_POINTER_ACCELERATION_ENABLE
+```
+
+The acceleration factor can be further tune _via_ the `CHARYBDIS_POINTER_ACCELERATION_FACTOR`:
+
+```c
+#define CHARYBDIS_POINTER_ACCELERATION_FACTOR 24
+```
+
+### Custom keycodes
+
+The Charybdis firmware defines a number of keycodes to leverage its features, namely:
+
+```
+#ifndef NO_CHARYBDIS_KEYCODES
+enum charybdis_keycodes {
+  POINTER_DEFAULT_DPI_FORWARD = SAFE_RANGE,
+  POINTER_DEFAULT_DPI_REVERSE,
+  POINTER_SNIPING_DPI_FORWARD,
+  POINTER_SNIPING_DPI_REVERSE,
+  SNIPING_MODE,
+  SNIPING_MODE_TOGGLE,
+  DRAGSCROLL_MODE,
+  DRAGSCROLL_MODE_TOGGLE,
+  CHARYBDIS_SAFE_RANGE,
+};
+
+#define DPI_MOD POINTER_DEFAULT_DPI_FORWARD
+#define DPI_RMOD POINTER_DEFAULT_DPI_REVERSE
+#define S_D_MOD POINTER_SNIPING_DPI_FORWARD
+#define S_D_RMOD POINTER_SNIPING_DPI_REVERSE
+#define SNIPING SNIPING_MODE
+#define SNP_TOG SNIPING_MODE_TOGGLE
+#define DRGSCRL DRAGSCROLL_MODE
+#define DRG_TOG DRAGSCROLL_MODE_TOGGLE
+#endif // !NO_CHARYBDIS_KEYCODES
+```
+
+Users extending the keycode set themselves (either in their keymap, or in their userspace) must start at `CHARYBDIS_SAFE_RANGE` to avoid conflicts, _eg._:
+
+```c
+enum userspace_keycodes {
+#ifndef NO_CHARYBDIS_KEYCODES
+  MY_FIRST_KEYCODE = CHARYBDIS_SAFE_RANGE,
+#else
+  MY_FIRST_KEYCODE = SAFE_RANGE,
+#endif // !NO_CHARYBDIS_KEYCODES
+  MY_SECOND_KEYCODE,
+  …
+};
+```
+
+To disable the custom keycodes, and reduce binary size, simply add a definition in `config.h`:
+
+```c
+#define NO_CHARYBDIS_KEYCODES
+```