[Keyboard] Add SharkPCB rev Alpha support (#7090)

* Add SharkPCB rev Alpha support

* Solve PWM pin assignment 

- Solve PWM pin configuration for the SharkPCB rev.Alpha, which backlight pin is B0

* Update shark.c copyright name

* Update shark.h copyright section

* Apply suggestions from code review

Suggestions from @zvecr and @drashna were accepted and applied for neater code. Also fixed typos and removed unused comments. See [pull request](https://github.com/qmk/qmk_firmware/pull/7090/files#diff-70c0a1f44287ae5810170b4180cdaa5d) for more information.

Co-Authored-By: Joel Challis <git@zvecr.com>
Co-Authored-By: Drashna Jaelre <drashna@live.com>

* Update PRODUCT_ID into config.h

* Update metadata info.json

Fields "keyboard_name", "keyboard_folder", "url", "maintainer" were updated

7 files changed, 561 insertions, 0 deletions

diff --git a/keyboards/acheron/shark/README.md b/keyboards/acheron/shark/README.md
new file mode 100644
index 000000000..fbe9429f1
--- /dev/null
+++ b/keyboards/acheron/shark/README.md
@@ -0,0 +1,17 @@
+# Acheron Aχξρων 40-SM-O-MX-TH-WI (Codename "SharkPCB") QMK firmware
+
+<p align="center">
+  <img align="middle" src="https://raw.githubusercontent.com/Gondolindrim/acheronLibrary/master/graphics/acheronLong.png"  width="400"> 
+</p>
+
+This is the QMK firmware repository for the Shark, updated until [revision Alpha](https://github.com/Gondolindrim/SharkPCB/releases/tag/Alpha).
+
+The SharkPCB is an Open-Hardware guidelines compliant PCB which files can be found at [this link](https://github.com/Gondolindrim/SharkPCB). Its designer and maintainer is [Gondolindrim](https://github.com/Gondolindrim).
+
+See the [AcheronDocs](https://gondolindrim.github.io/AcheronDocs/shark/intro.html) page for the SharkPCB full documentation.
+
+Make example for this keyboard (after setting up your build environment):
+
+    make acheron/shark:default
+
+See the [build environment setup](https://docs.qmk.fm/#/getting_started_build_tools) and the [make instructions](https://docs.qmk.fm/#/getting_started_make_guide) for more information. Brand new to QMK? Start with our [Complete Newbs Guide](https://docs.qmk.fm/#/newbs).
diff --git a/keyboards/acheron/shark/config.h b/keyboards/acheron/shark/config.h
new file mode 100644
index 000000000..5a46ac5b7
--- /dev/null
+++ b/keyboards/acheron/shark/config.h
@@ -0,0 +1,261 @@
+/*
+Copyright 2019 Alvaro Volpato and Steve
+
+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"
+
+/* USB Device descriptor parameter */
+#define VENDOR_ID       0xFEED
+#define PRODUCT_ID      0xAC11
+#define DEVICE_VER      0x0001
+#define MANUFACTURER    AcheronProject
+#define PRODUCT         SharkPCB
+#define DESCRIPTION     Ortho 40 PCB
+
+/* key matrix size */
+#define MATRIX_ROWS 4
+#define MATRIX_COLS 12
+
+/*
+ * Keyboard Matrix Assignments
+ *
+ * Change this to how you wired your keyboard
+ * COLS: AVR pins used for columns, left to right
+ * ROWS: AVR pins used for rows, top to bottom
+ * DIODE_DIRECTION: COL2ROW = COL = Anode (+), ROW = Cathode (-, marked on diode)
+ *                  ROW2COL = ROW = Anode (+), COL = Cathode (-, marked on diode)
+ *
+*/
+#define MATRIX_ROW_PINS {B4, A15, B10, B2}
+#define MATRIX_COL_PINS {B1, B12, A1, A7, A5, A4, A3, A2, A0, C15, C14, C13}
+//{C13, C14, C15, A0,A2,A3,A4,A5,A6, A1,B12,B1}
+/* Unused pins, in the default layout, are:
+EncA (B6) because it is not used in the default PCB
+All Extra pins (A8, B15, B14, B13, B3, B5, B8, B9) , for the same reason;
+B0, which is unconnected on the PCB
+*/
+//#define UNUSED_PINS { B0, B6, B13, B14, B15, B8, B9, B5, B3 }
+
+/* COL2ROW, ROW2COL*/
+#define DIODE_DIRECTION COL2ROW
+
+#define BACKLIGHT_PIN B0
+#define BACKLIGHT_PWM_DRIVER PWMD3
+#define BACKLIGHT_PWM_CHANNEL 3
+
+/*
+ * Split Keyboard specific options, make sure you have 'SPLIT_KEYBOARD = yes' in your rules.mk, and define SOFT_SERIAL_PIN.
+ */
+//#define SOFT_SERIAL_PIN D0 // or D1, D2, D3, E6
+
+// #define BACKLIGHT_PIN B7
+// #define BACKLIGHT_BREATHING
+// #define BACKLIGHT_LEVELS 3
+
+// #define RGB_DI_PIN E2
+// #ifdef RGB_DI_PIN
+//   #define RGBLED_NUM 16
+//   #define RGBLIGHT_HUE_STEP 8
+//   #define RGBLIGHT_SAT_STEP 8
+//   #define RGBLIGHT_VAL_STEP 8
+//   #define RGBLIGHT_LIMIT_VAL 255 /* The maximum brightness level */
+//   #define RGBLIGHT_SLEEP  /* If defined, the RGB lighting will be switched off when the host goes to sleep */
+// /*== all animations enable ==*/
+//   #define RGBLIGHT_ANIMATIONS
+// /*== or choose animations ==*/
+//   #define RGBLIGHT_EFFECT_BREATHING
+//   #define RGBLIGHT_EFFECT_RAINBOW_MOOD
+//   #define RGBLIGHT_EFFECT_RAINBOW_SWIRL
+//   #define RGBLIGHT_EFFECT_SNAKE
+//   #define RGBLIGHT_EFFECT_KNIGHT
+//   #define RGBLIGHT_EFFECT_CHRISTMAS
+//   #define RGBLIGHT_EFFECT_STATIC_GRADIENT
+//   #define RGBLIGHT_EFFECT_RGB_TEST
+//   #define RGBLIGHT_EFFECT_ALTERNATING
+// /*== customize breathing effect ==*/
+//   /*==== (DEFAULT) use fixed table instead of exp() and sin() ====*/
+//   #define RGBLIGHT_BREATHE_TABLE_SIZE 256      // 256(default) or 128 or 64
+//   /*==== use exp() and sin() ====*/
+//   #define RGBLIGHT_EFFECT_BREATHE_CENTER 1.85  // 1 to 2.7
+//   #define RGBLIGHT_EFFECT_BREATHE_MAX    255   // 0 to 255
+// #endif
+
+/* Debounce reduces chatter (unintended double-presses) - set 0 if debouncing is not needed */
+#define DEBOUNCE 5
+
+/* define if matrix has ghost (lacks anti-ghosting diodes) */
+//#define MATRIX_HAS_GHOST
+
+/* number of backlight levels */
+
+/* Mechanical locking support. Use KC_LCAP, KC_LNUM or KC_LSCR instead in keymap */
+#define LOCKING_SUPPORT_ENABLE
+/* Locking resynchronize hack */
+#define LOCKING_RESYNC_ENABLE
+
+/* If defined, GRAVE_ESC will always act as ESC when CTRL is held.
+ * This is userful for the Windows task manager shortcut (ctrl+shift+esc).
+ */
+// #define GRAVE_ESC_CTRL_OVERRIDE
+
+/*
+ * Force NKRO
+ *
+ * Force NKRO (nKey Rollover) to be enabled by default, regardless of the saved
+ * state in the bootmagic EEPROM settings. (Note that NKRO must be enabled in the
+ * makefile for this to work.)
+ *
+ * If forced on, NKRO can be disabled via magic key (default = LShift+RShift+N)
+ * until the next keyboard reset.
+ *
+ * NKRO may prevent your keystrokes from being detected in the BIOS, but it is
+ * fully operational during normal computer usage.
+ *
+ * For a less heavy-handed approach, enable NKRO via magic key (LShift+RShift+N)
+ * or via bootmagic (hold SPACE+N while plugging in the keyboard). Once set by
+ * bootmagic, NKRO mode will always be enabled until it is toggled again during a
+ * power-up.
+ *
+ */
+//#define FORCE_NKRO
+
+/*
+ * Magic Key Options
+ *
+ * Magic keys are hotkey commands that allow control over firmware functions of
+ * the keyboard. They are best used in combination with the HID Listen program,
+ * found here: https://www.pjrc.com/teensy/hid_listen.html
+ *
+ * The options below allow the magic key functionality to be changed. This is
+ * useful if your keyboard/keypad is missing keys and you want magic key support.
+ *
+ */
+
+/* key combination for magic key command */
+/* defined by default; to change, uncomment and set to the combination you want */
+// #define IS_COMMAND() (get_mods() == (MOD_BIT(KC_LSHIFT) | MOD_BIT(KC_RSHIFT)))
+
+/* control how magic key switches layers */
+//#define MAGIC_KEY_SWITCH_LAYER_WITH_FKEYS  true
+//#define MAGIC_KEY_SWITCH_LAYER_WITH_NKEYS  true
+//#define MAGIC_KEY_SWITCH_LAYER_WITH_CUSTOM false
+
+/* override magic key keymap */
+//#define MAGIC_KEY_SWITCH_LAYER_WITH_FKEYS
+//#define MAGIC_KEY_SWITCH_LAYER_WITH_NKEYS
+//#define MAGIC_KEY_SWITCH_LAYER_WITH_CUSTOM
+//#define MAGIC_KEY_HELP           H
+//#define MAGIC_KEY_HELP_ALT       SLASH
+//#define MAGIC_KEY_DEBUG          D
+//#define MAGIC_KEY_DEBUG_MATRIX   X
+//#define MAGIC_KEY_DEBUG_KBD      K
+//#define MAGIC_KEY_DEBUG_MOUSE    M
+//#define MAGIC_KEY_VERSION        V
+//#define MAGIC_KEY_STATUS         S
+//#define MAGIC_KEY_CONSOLE        C
+//#define MAGIC_KEY_LAYER0         0
+//#define MAGIC_KEY_LAYER0_ALT     GRAVE
+//#define MAGIC_KEY_LAYER1         1
+//#define MAGIC_KEY_LAYER2         2
+//#define MAGIC_KEY_LAYER3         3
+//#define MAGIC_KEY_LAYER4         4
+//#define MAGIC_KEY_LAYER5         5
+//#define MAGIC_KEY_LAYER6         6
+//#define MAGIC_KEY_LAYER7         7
+//#define MAGIC_KEY_LAYER8         8
+//#define MAGIC_KEY_LAYER9         9
+//#define MAGIC_KEY_BOOTLOADER     B
+//#define MAGIC_KEY_BOOTLOADER_ALT ESC
+//#define MAGIC_KEY_LOCK           CAPS
+//#define MAGIC_KEY_EEPROM         E
+//#define MAGIC_KEY_EEPROM_CLEAR   BSPACE
+//#define MAGIC_KEY_NKRO           N
+//#define MAGIC_KEY_SLEEP_LED      Z
+
+/*
+ * Feature disable options
+ *  These options are also useful to firmware size reduction.
+ */
+
+/* disable debug print */
+//#define NO_DEBUG
+
+/* disable print */
+//#define NO_PRINT
+
+/* disable action features */
+//#define NO_ACTION_LAYER
+//#define NO_ACTION_TAPPING
+//#define NO_ACTION_ONESHOT
+//#define NO_ACTION_MACRO
+//#define NO_ACTION_FUNCTION
+
+/*
+ * MIDI options
+ */
+
+/* Prevent use of disabled MIDI features in the keymap */
+//#define MIDI_ENABLE_STRICT 1
+
+/* enable basic MIDI features:
+   - MIDI notes can be sent when in Music mode is on
+*/
+//#define MIDI_BASIC
+
+/* enable advanced MIDI features:
+   - MIDI notes can be added to the keymap
+   - Octave shift and transpose
+   - Virtual sustain, portamento, and modulation wheel
+   - etc.
+*/
+//#define MIDI_ADVANCED
+
+/* override number of MIDI tone keycodes (each octave adds 12 keycodes and allocates 12 bytes) */
+//#define MIDI_TONE_KEYCODE_OCTAVES 1
+
+/*
+ * HD44780 LCD Display Configuration
+ */
+/*
+#define LCD_LINES           2     //< number of visible lines of the display
+#define LCD_DISP_LENGTH    16     //< visibles characters per line of the display
+
+#define LCD_IO_MODE      1            //< 0: memory mapped mode, 1: IO port mode
+
+#if LCD_IO_MODE
+#define LCD_PORT         PORTB        //< port for the LCD lines
+#define LCD_DATA0_PORT   LCD_PORT     //< port for 4bit data bit 0
+#define LCD_DATA1_PORT   LCD_PORT     //< port for 4bit data bit 1
+#define LCD_DATA2_PORT   LCD_PORT     //< port for 4bit data bit 2
+#define LCD_DATA3_PORT   LCD_PORT     //< port for 4bit data bit 3
+#define LCD_DATA0_PIN    4            //< pin for 4bit data bit 0
+#define LCD_DATA1_PIN    5            //< pin for 4bit data bit 1
+#define LCD_DATA2_PIN    6            //< pin for 4bit data bit 2
+#define LCD_DATA3_PIN    7            //< pin for 4bit data bit 3
+#define LCD_RS_PORT      LCD_PORT     //< port for RS line
+#define LCD_RS_PIN       3            //< pin  for RS line
+#define LCD_RW_PORT      LCD_PORT     //< port for RW line
+#define LCD_RW_PIN       2            //< pin  for RW line
+#define LCD_E_PORT       LCD_PORT     //< port for Enable line
+#define LCD_E_PIN        1            //< pin  for Enable line
+#endif
+*/
+
+/* Bootmagic Lite key configuration */
+// #define BOOTMAGIC_LITE_ROW 0
+// #define BOOTMAGIC_LITE_COLUMN 0
diff --git a/keyboards/acheron/shark/info.json b/keyboards/acheron/shark/info.json
new file mode 100644
index 000000000..a2ea784d9
--- /dev/null
+++ b/keyboards/acheron/shark/info.json
@@ -0,0 +1,63 @@
+{
+  "keyboard_name": "SharkPCB",
+  "keyboard_folder": "acheron/shark",
+  "url": "https://gondolindrim.github.io/AcheronDocs/shark/intro.html",
+  "maintainer": "Gondolindrim",
+  "width": 12,
+  "height": 4,
+  "layouts": {
+    "LAYOUT_ortho_4x12": {
+      "key_count": 48,
+      "layout": [
+        { "x": 0, "y": 0 },
+        { "x": 1, "y": 0 },
+        { "x": 2, "y": 0 },
+        { "x": 3, "y": 0 },
+        { "x": 4, "y": 0 },
+        { "x": 5, "y": 0 },
+        { "x": 6, "y": 0 },
+        { "x": 7, "y": 0 },
+        { "x": 8, "y": 0 },
+        { "x": 9, "y": 0 },
+        { "x": 10, "y": 0 },
+        { "x": 11, "y": 0 },
+        { "x": 0, "y": 1 },
+        { "x": 1, "y": 1 },
+        { "x": 2, "y": 1 },
+        { "x": 3, "y": 1 },
+        { "x": 4, "y": 1 },
+        { "x": 5, "y": 1 },
+        { "x": 6, "y": 1 },
+        { "x": 7, "y": 1 },
+        { "x": 8, "y": 1 },
+        { "x": 9, "y": 1 },
+        { "x": 10, "y": 1 },
+        { "x": 11, "y": 1 },
+        { "x": 0, "y": 2 },
+        { "x": 1, "y": 2 },
+        { "x": 2, "y": 2 },
+        { "x": 3, "y": 2 },
+        { "x": 4, "y": 2 },
+        { "x": 5, "y": 2 },
+        { "x": 6, "y": 2 },
+        { "x": 7, "y": 2 },
+        { "x": 8, "y": 2 },
+        { "x": 9, "y": 2 },
+        { "x": 10, "y": 2 },
+        { "x": 11, "y": 2 },
+        { "x": 0, "y": 3 },
+        { "x": 1, "y": 3 },
+        { "x": 2, "y": 3 },
+        { "x": 3, "y": 3 },
+        { "x": 4, "y": 3 },
+        { "x": 5, "y": 3 },
+        { "x": 6, "y": 3 },
+        { "x": 7, "y": 3 },
+        { "x": 8, "y": 3 },
+        { "x": 9, "y": 3 },
+        { "x": 10, "y": 3 },
+        { "x": 11, "y": 3 }
+      ]
+    }
+  }
+}
diff --git a/keyboards/acheron/shark/keymaps/default/keymap.c b/keyboards/acheron/shark/keymaps/default/keymap.c
new file mode 100644
index 000000000..a661b835b
--- /dev/null
+++ b/keyboards/acheron/shark/keymaps/default/keymap.c
@@ -0,0 +1,105 @@
+/* Copyright 2019
+ *
+ * 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 layers {
+  _QWERTY = 0,
+  _LOWER,
+  _RAISE,
+  _ADJUST,
+};
+
+#define LOWER  MO(_LOWER)
+#define RAISE  MO(_RAISE)
+#define ADJUST MO(_ADJUST)
+
+const uint16_t PROGMEM keymaps[][MATRIX_ROWS][MATRIX_COLS] = {
+/* Qwerty
+ * ,-----------------------------------------------------------------------------------.
+ * | Tab  |   Q  |   W  |   E  |   R  |   T  |   Y  |   U  |   I  |   O  |   P  | Bksp |
+ * |------+------+------+------+------+-------------+------+------+------+------+------|
+ * | Esc  |   A  |   S  |   D  |   F  |   G  |   H  |   J  |   K  |   L  |   ;  |  "   |
+ * |------+------+------+------+------+------|------+------+------+------+------+------|
+ * | Shift|   Z  |   X  |  C   |   V  |   B  |   N  |   M  |   ,  |   .  |   /  |Enter |
+ * |------+------+------+------+------+------+------+------+------+------+------+------|
+ * | Ctrl | Alt  | GUI  |      |Lower | Space| Space|Raise | Left | Down |  Up  |Right |
+ * `-----------------------------------------------------------------------------------'
+ */
+[_QWERTY] = LAYOUT_ortho_4x12( \
+  KC_TAB,  KC_Q,    KC_W,    KC_E,    KC_R,    KC_T,    KC_Y,    KC_U,    KC_I,    KC_O,    KC_P,    KC_BSPC, \
+  KC_ESC,  KC_A,    KC_S,    KC_D,    KC_F,    KC_G,    KC_H,    KC_J,    KC_K,    KC_L,    KC_SCLN, KC_QUOT, \
+  KC_LSFT, KC_Z,    KC_X,    KC_C,    KC_V,    KC_B,    KC_N,    KC_M,    KC_COMM, KC_DOT,  KC_SLSH, KC_ENT , \
+  KC_LCTL, KC_LALT, KC_LGUI, _______, LOWER,   KC_SPC,  KC_SPC,  RAISE,   KC_LEFT, KC_DOWN, KC_UP,   KC_RGHT \
+),
+
+/* Lower
+ * ,-----------------------------------------------------------------------------------.
+ * |   ~  |   !  |   @  |   #  |   $  |   %  |   ^  |   &  |   *  |   (  |   )  | Bksp |
+ * |------+------+------+------+------+-------------+------+------+------+------+------|
+ * | Del  |  F1  |  F2  |  F3  |  F4  |  F5  |  F6  |   _  |   +  |     |    \  |  |   |
+ * |------+------+------+------+------+------|------+------+------+------+------+------|
+ * |      |  F7  |  F8  |  F9  |  F10 |  F11 |  F12 |ISO ~ |ISO | |      |      |Enter |
+ * |------+------+------+------+------+------+------+------+------+------+------+------|
+ * |      |      |      |      |      |             |      | Next | Vol- | Vol+ | Play |
+ * `-----------------------------------------------------------------------------------'
+ */
+[_LOWER] = LAYOUT_ortho_4x12( \
+  KC_TILD, KC_EXLM, KC_AT,   KC_HASH, KC_DLR,  KC_PERC, KC_CIRC, KC_AMPR, KC_ASTR, KC_LPRN, KC_RPRN, KC_BSPC, \
+  KC_DEL,  KC_F1,   KC_F2,   KC_F3,   KC_F4,   KC_F5,   KC_F6,   KC_UNDS, KC_PLUS, KC_LCBR, KC_RCBR, KC_PIPE, \
+  _______, KC_F7,   KC_F8,   KC_F9,   KC_F10,  KC_F11,  KC_F12,  BL_TOGG, BL_INC , BL_DEC , _______, _______, \
+  _______, _______, _______, _______, _______, _______, _______, _______, KC_MNXT, KC_VOLD, KC_VOLU, KC_MPLY \
+),
+
+/* Raise
+ * ,-----------------------------------------------------------------------------------.
+ * |   `  |   1  |   2  |   3  |   4  |   5  |   6  |   7  |   8  |   9  |   0  | Bksp |
+ * |------+------+------+------+------+-------------+------+------+------+------+------|
+ * | Del  |  F1  |  F2  |  F3  |  F4  |  F5  |  F6  |   -  |   =  |   [  |   ]  |  \   |
+ * |------+------+------+------+------+------|------+------+------+------+------+------|
+ * |      |  F7  |  F8  |  F9  |  F10 |  F11 |  F12 |ISO # |ISO / |      |      |Enter |
+ * |------+------+------+------+------+------+------+------+------+------+------+------|
+ * |      |      |      |      |      |             |      | Next | Vol- | Vol+ | Play |
+ * `-----------------------------------------------------------------------------------'
+ */
+[_RAISE] = LAYOUT_ortho_4x12( \
+  KC_GRV,  KC_1,    KC_2,    KC_3,    KC_4,    KC_5,    KC_6,    KC_7,    KC_8,    KC_9,    KC_0,    KC_BSPC, \
+  KC_DEL,  KC_F1,   KC_F2,   KC_F3,   KC_F4,   KC_F5,   KC_F6,   KC_MINS, KC_EQL,  KC_LBRC, KC_RBRC, KC_BSLS, \
+  _______, KC_F7,   KC_F8,   KC_F9,   KC_F10,  KC_F11,  KC_F12,  KC_NUHS, KC_NUBS, _______, _______, _______, \
+  _______, _______, _______, _______, _______, _______, _______, _______, KC_MNXT, KC_VOLD, KC_VOLU, KC_MPLY \
+),
+
+/* Adjust (Lower + Raise)
+ * ,-----------------------------------------------------------------------------------.
+ * |      | Reset|      |      |      |      |      |      |      |      |      |  Del |
+ * |------+------+------+------+------+-------------+------+------+------+------+------|
+ * |      |      |      |      |      |      |      |      |      |      |      |      |
+ * |------+------+------+------+------+------|------+------+------+------+------+------|
+ * |      |      |      |      |      |      |      |      |      |      |      |      |
+ * |------+------+------+------+------+------+------+------+------+------+------+------|
+ * |      |      |      |      |      |             |      |      |      |      |      |
+ * `-----------------------------------------------------------------------------------'
+ */
+[_ADJUST] =  LAYOUT_ortho_4x12( \
+  _______, RESET,   _______, _______, _______, _______, _______, _______, _______, _______, _______, KC_DEL, \
+  _______, _______, _______, _______, _______, _______, _______, _______, _______, _______, _______, _______,\
+  _______, _______, RGB_TOG, RGB_MOD, _______, _______, _______, _______, _______, _______, _______, _______,\
+  _______, BL_TOGG, BL_INC,  BL_DEC , _______, _______, _______, _______, _______, _______, _______, _______ \
+)
+};
+
+layer_state_t layer_state_set_user(layer_state_t state) {
+  return update_tri_layer_state(state, _LOWER, _RAISE, _ADJUST);
+}
diff --git a/keyboards/acheron/shark/rules.mk b/keyboards/acheron/shark/rules.mk
new file mode 100644
index 000000000..30c4593db
--- /dev/null
+++ b/keyboards/acheron/shark/rules.mk
@@ -0,0 +1,25 @@
+# MCU name
+MCU = STM32F303
+
+# Build Options
+#   change yes to no to disable
+#
+BOOTMAGIC_ENABLE = yes     # Virtual DIP switch configuration
+MOUSEKEY_ENABLE = yes       # Mouse keys
+EXTRAKEY_ENABLE = yes       # Audio control and System control
+CONSOLE_ENABLE = yes        # Console for debug
+COMMAND_ENABLE = yes        # Commands for debug and configuration
+# Do not enable SLEEP_LED_ENABLE. it uses the same timer as BACKLIGHT_ENABLE
+SLEEP_LED_ENABLE = no       # Breathing sleep LED during USB suspend
+# if this doesn't work, see here: https://github.com/tmk/tmk_keyboard/wiki/FAQ#nkro-doesnt-work
+NKRO_ENABLE = no            # USB Nkey Rollover
+BACKLIGHT_ENABLE = no       # Enable keyboard backlight functionality on B7 by default
+RGBLIGHT_ENABLE = no        # Enable keyboard RGB underglow
+MIDI_ENABLE = no            # MIDI support 
+UNICODE_ENABLE = no         # Unicode
+BLUETOOTH_ENABLE = no       # Enable Bluetooth with the Adafruit EZ-Key HID
+AUDIO_ENABLE = no           # Audio output on port C6
+FAUXCLICKY_ENABLE = no      # Use buzzer to emulate clicky switches
+HD44780_ENABLE = no 		# Enable support for HD44780 based LCDs
+
+LAYOUTS = ortho_4x12
diff --git a/keyboards/acheron/shark/shark.c b/keyboards/acheron/shark/shark.c
new file mode 100644
index 000000000..b15c8a270
--- /dev/null
+++ b/keyboards/acheron/shark/shark.c
@@ -0,0 +1,51 @@
+/* Copyright 2019 Álvaro "Gondolindrim" Volpato
+ *
+ * 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 "shark.h"
+
+// Optional override functions below.
+// You can leave any or all of these undefined.
+// These are only required if you want to perform custom actions.
+
+/*
+
+void matrix_init_kb(void) {
+  // put your keyboard start-up code here
+  // runs once when the firmware starts up
+
+  matrix_init_user();
+}
+
+void matrix_scan_kb(void) {
+  // put your looping keyboard code here
+  // runs every cycle (a lot)
+
+  matrix_scan_user();
+}
+
+bool process_record_kb(uint16_t keycode, keyrecord_t *record) {
+  // put your per-action keyboard code here
+  // runs for every action, just before processing by the firmware
+
+  return process_record_user(keycode, record);
+}
+
+void led_set_kb(uint8_t usb_led) {
+  // put your keyboard LED indicator (ex: Caps Lock LED) toggling code here
+
+  led_set_user(usb_led);
+}
+
+*/
diff --git a/keyboards/acheron/shark/shark.h b/keyboards/acheron/shark/shark.h
new file mode 100644
index 000000000..d58b72548
--- /dev/null
+++ b/keyboards/acheron/shark/shark.h
@@ -0,0 +1,39 @@
+/* Copyright 2019 Álvaro "Gondolindrim" Volpato
+ *
+ * This program is free software: you can redistribute it and/or modify
+ * it under the terms of the GNU General Public License as published by
+ * the Free Software Foundation, either version 2 of the License, or
+ * (at your option) any later version.
+ *
+ * This program is distributed in the hope that it will be useful,
+ * but WITHOUT ANY WARRANTY; without even the implied warranty of
+ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+ * GNU General Public License for more details.
+ *
+ * You should have received a copy of the GNU General Public License
+ * along with this program.  If not, see <http://www.gnu.org/licenses/>.
+ */
+#pragma once
+
+#include "quantum.h"
+
+/* This a shortcut to help you visually see your layout.
+ *
+ * The first section contains all of the arguments representing the physical
+ * layout of the board and position of the keys.
+ *
+ * The second converts the arguments into a two-dimensional array which
+ * represents the switch matrix.
+ */
+#define LAYOUT_ortho_4x12( \
+    K00, K01, K02, K03, K04, K05, K06, K07, K08, K09, K0A, K0B, \
+    K10, K11, K12, K13, K14, K15, K16, K17, K18, K19, K1A, K1B, \
+    K20, K21, K22, K23, K24, K25, K26, K27, K28, K29, K2A, K2B, \
+    K30, K31, K32, K33, K34, K35, K36, K37, K38, K39, K3A, K3B  \
+) \
+{ \
+    { K00, K01, K02, K03, K04, K05, K06, K07, K08, K09, K0A, K0B }, \
+    { K10, K11, K12, K13, K14, K15, K16, K17, K18, K19, K1A, K1B }, \
+    { K20, K21, K22, K23, K24, K25, K26, K27, K28, K29, K2A, K2B }, \
+    { K30, K31, K32, K33, K34, K35, K36, K37, K38, K39, K3A, K3B }  \
+}