[Keyboard] Adds Elongate Revision Delta PCB support (#15498)

Co-authored-by: Drashna Jaelre <drashna@live.com>
Co-authored-by: James Young <18669334+noroadsleft@users.noreply.github.com>
Co-authored-by: Ryan <fauxpark@gmail.com>

11 files changed, 414 insertions, 0 deletions

diff --git a/keyboards/acheron/elongate/beta/beta.c b/keyboards/acheron/elongate/beta/beta.c
new file mode 100644
index 0000000000..ffa13d4fe1
--- /dev/null
+++ b/keyboards/acheron/elongate/beta/beta.c
@@ -0,0 +1,17 @@
+/* Copyright 2020 Gondolindrim
+ *
+ * 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 "beta.h"
diff --git a/keyboards/acheron/elongate/beta/beta.h b/keyboards/acheron/elongate/beta/beta.h
new file mode 100644
index 0000000000..6ff32b4f75
--- /dev/null
+++ b/keyboards/acheron/elongate/beta/beta.h
@@ -0,0 +1,44 @@
+/* Copyright 2020 Gondolindrim
+ *
+ * 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 is 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 KNO KC_NO
+
+#define LAYOUT( \
+    K00, K01, K02, K03, K04, K05, K06, K07, K08, K09, K0A, K0B, K0C, K49, K41, \
+    K10, K11, K12, K13, K14, K15, K16, K17, K18, K19,      K1B, K1C, K4A, K42, \
+    K20,      K22, K23, K24, K25, K26, K27, K28, K29, K2A, K2B, K2C, K4B, K44, \
+    K30, K31, K32,      K34,           K37,      K3A, K3B, K3C, K3D, K4C, K47  \
+)\
+{\
+    { K00, K01, K02, K03, K04, K05, K06, K07, K08, K09, K0A, K0B, K0C }, \
+    { K10, K11, K12, K13, K14, K15, K16, K17, K18, K19, KNO, K1B, K1C }, \
+    { K20, KNO, K22, K23, K24, K25, K26, K27, K28, K29, K2A, K2B, K2C }, \
+    { K30, K31, K32, KNO, K34, KNO, KNO, K37, KNO, K3A, K3B, K3C, K3D }, \
+    { KNO, K41, K42, KNO, K44, KNO, KNO, K47, KNO, K49, K4A, K4B, K4C }  \
+}
diff --git a/keyboards/acheron/elongate/beta/config.h b/keyboards/acheron/elongate/beta/config.h
new file mode 100644
index 0000000000..c02cf08979
--- /dev/null
+++ b/keyboards/acheron/elongate/beta/config.h
@@ -0,0 +1,150 @@
+/*
+Copyright 2020 Gondolindrim
+
+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 0x4150 //AP for AcheronProject
+#define PRODUCT_ID 0x454C // EL for Elongate
+#define DEVICE_VER 0x0001
+#define MANUFACTURER Acheron Project
+#define PRODUCT Elongate
+
+/* key matrix size */
+#define MATRIX_ROWS 5
+#define MATRIX_COLS 13
+
+/*
+ * 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 { D3, B7, D5, B5, D6 }
+#define MATRIX_COL_PINS { F5, F6, F4, F1, F0, B2, B1, C6, B0, B3, E6, D4, B4}
+//#define UNUSED_PINS
+
+/* COL2ROW, ROW2COL*/
+#define DIODE_DIRECTION COL2ROW
+
+/*
+ * 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 D7
+#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
+
+/* 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
+
+/*
+ * 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
+
+/* disable these deprecated features by default */
+#define NO_ACTION_MACRO
+#define NO_ACTION_FUNCTION
+
+/* Bootmagic Lite key configuration */
+// #define BOOTMAGIC_LITE_ROW 0
+// #define BOOTMAGIC_LITE_COLUMN 0
+
+#define LED_NUM_LOCK_PIN D2
+#define LED_CAPS_LOCK_PIN D1
+#define LED_SCROLL_LOCK_PIN D0
diff --git a/keyboards/acheron/elongate/beta/info.json b/keyboards/acheron/elongate/beta/info.json
new file mode 100644
index 0000000000..bfb9db9b3a
--- /dev/null
+++ b/keyboards/acheron/elongate/beta/info.json
@@ -0,0 +1,68 @@
+{
+    "keyboard_name": "Elongate",
+    "url": "http://gondolindrim.github.io/AcheronDocs/elongate/introduction.html",
+    "maintainer": "Gondolindrim",
+    "layouts": {
+        "LAYOUT": {
+            "layout": [
+                {"label":"Tab", "x":0, "y":0},
+                {"label":"Q", "x":1, "y":0},
+                {"label":"W", "x":2, "y":0},
+                {"label":"E", "x":3, "y":0},
+                {"label":"R", "x":4, "y":0},
+                {"label":"T", "x":5, "y":0},
+                {"label":"Y", "x":6, "y":0},
+                {"label":"U", "x":7, "y":0},
+                {"label":"I", "x":8, "y":0},
+                {"label":"O", "x":9, "y":0},
+                {"label":"P", "x":10, "y":0},
+                {"label":"Backspace", "x":11, "y":0},
+                {"label":"7", "x":12.5, "y":0},
+                {"label":"8", "x":13.5, "y":0},
+                {"label":"9", "x":14.5, "y":0},
+
+                {"label":"Caps Lock", "x":0, "y":1, "w":1.25},
+                {"label":"A", "x":1.25, "y":1},
+                {"label":"S", "x":2.25, "y":1},
+                {"label":"D", "x":3.25, "y":1},
+                {"label":"F", "x":4.25, "y":1},
+                {"label":"G", "x":5.25, "y":1},
+                {"label":"H", "x":6.25, "y":1},
+                {"label":"J", "x":7.25, "y":1},
+                {"label":"K", "x":8.25, "y":1},
+                {"label":"L", "x":9.25, "y":1},
+                {"label":"Enter", "x":10.25, "y":1, "w":1.75},
+                {"label":"4", "x":12.5, "y":1},
+                {"label":"5", "x":13.5, "y":1},
+                {"label":"6", "x":14.5, "y":1},
+                
+                {"label":"Shift", "x":0, "y":2, "w":1.75},
+                {"label":"Z", "x":1.75, "y":2},
+                {"label":"X", "x":2.75, "y":2},
+                {"label":"C", "x":3.75, "y":2},
+                {"label":"V", "x":4.75, "y":2},
+                {"label":"B", "x":5.75, "y":2},
+                {"label":"N", "x":6.75, "y":2},
+                {"label":"M", "x":7.75, "y":2},
+                {"label":"<", "x":8.75, "y":2},
+                {"label":"Fn1", "x":9.75, "y":2, "w":1.25},
+                {"label":"Up", "x":11.25, "y":2.25},
+                {"label":"1", "x":12.5, "y":2},
+                {"label":"2", "x":13.5, "y":2},
+                {"label":"3", "x":14.5, "y":2},
+                
+                {"label":"Ctrl", "x":0, "y":3, "w":1.25},
+                {"label":"Win", "x":1.25, "y":3},
+                {"label":"Alt", "x":2.25, "y":3, "w":1.25},
+                {"label":"Space/Fn2", "x":3.5, "y":3, "w":2.25},
+                {"label":"Space", "x":6.25, "y":3, "w":2.75},
+                {"label":"Alt", "x":9, "y":3},
+                {"label":"Left", "x":10.25, "y":3.25},
+                {"label":"Down", "x":11.25, "y":3.25},
+                {"label":"Right", "x":12.25, "y":3.25},
+                {"label":"0", "x":13.5, "y":3},
+                {"label":".", "x":14.5, "y":3}
+            ]
+        }
+    }
+}
diff --git a/keyboards/acheron/elongate/beta/keymaps/default/keymap.c b/keyboards/acheron/elongate/beta/keymaps/default/keymap.c
new file mode 100644
index 0000000000..c2b809b744
--- /dev/null
+++ b/keyboards/acheron/elongate/beta/keymaps/default/keymap.c
@@ -0,0 +1,34 @@
+/* Copyright 2020 Gondolindrim
+ *
+ * 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
+
+const uint16_t PROGMEM keymaps[][MATRIX_ROWS][MATRIX_COLS] = {
+[0] = LAYOUT( /* Base */
+    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_P7,    KC_P8,   KC_P9,
+    KC_SLCK,  KC_A,    KC_S,    KC_D,    KC_F,            KC_G,    KC_H,    KC_J,    KC_K,    KC_L,             KC_ENTER,   KC_P4,    KC_P5,   KC_P6,
+    KC_LSHIFT,         KC_Z,    KC_X,    KC_C,            KC_V,    KC_B,    KC_N,    KC_M,    KC_COMM, MO(1)  , KC_UP,      KC_P1,    KC_P2,   KC_P3,
+    KC_LCTRL, KC_LWIN, KC_LALT,          LT(2, KC_SPACE),                   KC_SPC,           KC_RALT, KC_LEFT, KC_DOWN,    KC_RIGHT, KC_P0,   KC_DOT),
+[1] = LAYOUT( /* Base */
+    KC_F1,    KC_F2,   KC_F2,   KC_F4,   KC_F5,           KC_F6,   KC_F7,   KC_F8,   KC_LBRC, KC_RBRC, KC_MINS,  KC_EQL,    KC_NLCK, KC_SLCK, KC_CAPS,
+    KC_1,     KC_2,    KC_3,    KC_4,    KC_5,            KC_6,    KC_7,    KC_8,    KC_9,    KC_0,              KC_RSHIFT, KC_TRNS, KC_TRNS, KC_TRNS,
+    KC_TRNS,           KC_TRNS, KC_TRNS, KC_TRNS,         KC_TRNS, KC_TRNS, KC_SCLN, KC_QUOT, KC_SLSH, KC_TRNS,  KC_PGUP,   KC_TRNS, KC_TRNS, KC_TRNS,
+    KC_TRNS,  KC_TRNS, KC_TRNS,          KC_TRNS,                           KC_SPC,           KC_TRNS, KC_HOME,  KC_PGDN,   KC_END , KC_TRNS, KC_TRNS),
+[2] = LAYOUT( /* Base */                                    
+    KC_TRNS, KC_TRNS, KC_TRNS, KC_TRNS,  KC_TRNS ,        KC_TRNS, KC_TRNS, KC_TRNS, KC_TRNS, KC_TRNS, KC_TRNS,  KC_TRNS,   KC_TRNS, KC_TRNS, KC_TRNS,
+    KC_TRNS, KC_TRNS, KC_TRNS, KC_TRNS,  KC_TRNS ,        KC_TRNS, KC_TRNS, KC_TRNS, KC_TRNS, KC_TRNS,           KC_TRNS,   KC_TRNS, KC_TRNS, KC_TRNS,
+    KC_TRNS,          RGB_TOG, RGB_MOD,  RGB_RMOD,        RGB_M_T, KC_TRNS, KC_TRNS, KC_TRNS, KC_TRNS, KC_TRNS,  KC_TRNS,   KC_TRNS, KC_TRNS, KC_TRNS,
+    KC_TRNS, KC_TRNS, KC_TRNS,           KC_TRNS ,                          KC_SPC,           KC_TRNS, KC_TRNS,  KC_TRNS,   KC_TRNS, KC_TRNS, KC_TRNS),
+};
diff --git a/keyboards/acheron/elongate/beta/keymaps/default/readme.md b/keyboards/acheron/elongate/beta/keymaps/default/readme.md
new file mode 100644
index 0000000000..a154ac5915
--- /dev/null
+++ b/keyboards/acheron/elongate/beta/keymaps/default/readme.md
@@ -0,0 +1 @@
+# The default keymap for Elongate
diff --git a/keyboards/acheron/elongate/beta/keymaps/via/config.h b/keyboards/acheron/elongate/beta/keymaps/via/config.h
new file mode 100644
index 0000000000..a3b77a5b4d
--- /dev/null
+++ b/keyboards/acheron/elongate/beta/keymaps/via/config.h
@@ -0,0 +1,3 @@
+#pragma once
+
+#define DYNAMIC_KEYMAP_LAYER_COUNT 3
diff --git a/keyboards/acheron/elongate/beta/keymaps/via/keymap.c b/keyboards/acheron/elongate/beta/keymaps/via/keymap.c
new file mode 100644
index 0000000000..c2b809b744
--- /dev/null
+++ b/keyboards/acheron/elongate/beta/keymaps/via/keymap.c
@@ -0,0 +1,34 @@
+/* Copyright 2020 Gondolindrim
+ *
+ * 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
+
+const uint16_t PROGMEM keymaps[][MATRIX_ROWS][MATRIX_COLS] = {
+[0] = LAYOUT( /* Base */
+    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_P7,    KC_P8,   KC_P9,
+    KC_SLCK,  KC_A,    KC_S,    KC_D,    KC_F,            KC_G,    KC_H,    KC_J,    KC_K,    KC_L,             KC_ENTER,   KC_P4,    KC_P5,   KC_P6,
+    KC_LSHIFT,         KC_Z,    KC_X,    KC_C,            KC_V,    KC_B,    KC_N,    KC_M,    KC_COMM, MO(1)  , KC_UP,      KC_P1,    KC_P2,   KC_P3,
+    KC_LCTRL, KC_LWIN, KC_LALT,          LT(2, KC_SPACE),                   KC_SPC,           KC_RALT, KC_LEFT, KC_DOWN,    KC_RIGHT, KC_P0,   KC_DOT),
+[1] = LAYOUT( /* Base */
+    KC_F1,    KC_F2,   KC_F2,   KC_F4,   KC_F5,           KC_F6,   KC_F7,   KC_F8,   KC_LBRC, KC_RBRC, KC_MINS,  KC_EQL,    KC_NLCK, KC_SLCK, KC_CAPS,
+    KC_1,     KC_2,    KC_3,    KC_4,    KC_5,            KC_6,    KC_7,    KC_8,    KC_9,    KC_0,              KC_RSHIFT, KC_TRNS, KC_TRNS, KC_TRNS,
+    KC_TRNS,           KC_TRNS, KC_TRNS, KC_TRNS,         KC_TRNS, KC_TRNS, KC_SCLN, KC_QUOT, KC_SLSH, KC_TRNS,  KC_PGUP,   KC_TRNS, KC_TRNS, KC_TRNS,
+    KC_TRNS,  KC_TRNS, KC_TRNS,          KC_TRNS,                           KC_SPC,           KC_TRNS, KC_HOME,  KC_PGDN,   KC_END , KC_TRNS, KC_TRNS),
+[2] = LAYOUT( /* Base */                                    
+    KC_TRNS, KC_TRNS, KC_TRNS, KC_TRNS,  KC_TRNS ,        KC_TRNS, KC_TRNS, KC_TRNS, KC_TRNS, KC_TRNS, KC_TRNS,  KC_TRNS,   KC_TRNS, KC_TRNS, KC_TRNS,
+    KC_TRNS, KC_TRNS, KC_TRNS, KC_TRNS,  KC_TRNS ,        KC_TRNS, KC_TRNS, KC_TRNS, KC_TRNS, KC_TRNS,           KC_TRNS,   KC_TRNS, KC_TRNS, KC_TRNS,
+    KC_TRNS,          RGB_TOG, RGB_MOD,  RGB_RMOD,        RGB_M_T, KC_TRNS, KC_TRNS, KC_TRNS, KC_TRNS, KC_TRNS,  KC_TRNS,   KC_TRNS, KC_TRNS, KC_TRNS,
+    KC_TRNS, KC_TRNS, KC_TRNS,           KC_TRNS ,                          KC_SPC,           KC_TRNS, KC_TRNS,  KC_TRNS,   KC_TRNS, KC_TRNS, KC_TRNS),
+};
diff --git a/keyboards/acheron/elongate/beta/keymaps/via/rules.mk b/keyboards/acheron/elongate/beta/keymaps/via/rules.mk
new file mode 100644
index 0000000000..1e5b99807c
--- /dev/null
+++ b/keyboards/acheron/elongate/beta/keymaps/via/rules.mk
@@ -0,0 +1 @@
+VIA_ENABLE = yes
diff --git a/keyboards/acheron/elongate/beta/readme.md b/keyboards/acheron/elongate/beta/readme.md
new file mode 100755
index 0000000000..8a8949fdfe
--- /dev/null
+++ b/keyboards/acheron/elongate/beta/readme.md
@@ -0,0 +1,43 @@
+# Acheron Elongate rev. Beta QMK firmware repository
+
+![](https://i.imgur.com/G9LESkUh.jpg)
+
+* Keyboard Maintainer: [Gondolindrim](https://github.com/Gondolindrim)
+* Hardware Supported: [open-source PCB](https://github.com/AcheronProject/Elongate) powered by STM32F072 microcontroller
+* Hardware Availability: the revision beta of Elongate was never publicly sold.
+
+## Introduction
+
+This is the QMK firmware repository for the Elongate PCB revision Beta and pre-revision Beta versions, which was the initial revision PCB for this keyboard; hence it was never sold publicly.
+
+The Elongate PCB is an Open-Hardware-guideline-compliant PCB which files can be found at [this repository](https://github.com/AcheronProject/Elongate). Its designer and maintainer is [Gondolindrim](https://github.com/Gondolindrim).
+
+## How to flash
+
+### Enter bootloader
+
+The DFU state in the bootloader can be accessed in 3 ways:
+
+* **Bootmagic reset**: Hold down the key at (0,0) in the matrix (usually the top left key or Escape) and plug in the keyboard
+* **Physical reset button**: press the button on the front of the PCB.
+* **Keycode in layout**: Press the key mapped to `RESET` if it is available.
+
+## Compile firmware
+
+You can build the default layout firwmare for Elongate after setting up your build environment by using:
+
+    make acheron/elongate/beta:default
+
+After entering DFU state in your PCB, you can download the binary file generated through `dfu-util` or a GUI like QMK Toolbox.
+
+To directly flash the PCB after it is put into a DFU state, use
+
+    make acheron/elongate/beta:default:flash
+
+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).
+
+## PCB Documentation
+
+See the [AcheronDocs](https://acheronproject.com/pcbs/elongate/) page for the ElongatePCB full documentation. You can also check the KiCad PCB files at the [Elongate GitHub repository](https://github.com/AcheronProject/Elongate).
+
+Before using the files for personal or commercial use, please read the [Acheron Open-Hardware License V1.4](https://acheronproject.com/AOHL14/) under which the Elongate PCB is published.
diff --git a/keyboards/acheron/elongate/beta/rules.mk b/keyboards/acheron/elongate/beta/rules.mk
new file mode 100644
index 0000000000..976f6aecc1
--- /dev/null
+++ b/keyboards/acheron/elongate/beta/rules.mk
@@ -0,0 +1,19 @@
+# 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 = yes        # Commands for debug and configuration
+NKRO_ENABLE = no            # Enable N-Key Rollover
+BACKLIGHT_ENABLE = no       # Enable keyboard backlight functionality
+RGBLIGHT_ENABLE = yes        # Enable keyboard RGB underglow
+AUDIO_ENABLE = no           # Audio output
+LTO_ENABLE = yes