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

13 files changed, 952 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