New keyboard added "Zen" (#2347)

* New keyboard added

Zen is a split ortholinear currently in group buy.

* remove bad keymap

Keymap was throwing errors

* remove other bad keymap

I should have checked these before haha

* small fix to update folder name

* renamed temp

* renamed to zen

* update folder name

* Slim down matrix code

Suggested by drashna

* move KC_NO

* Update keymap

* change from rev2 to rev1

19 files changed, 1316 insertions, 0 deletions

diff --git a/keyboards/zen/config.h b/keyboards/zen/config.h
new file mode 100644
index 0000000000..f8f8bbf332
--- /dev/null
+++ b/keyboards/zen/config.h
@@ -0,0 +1,29 @@
+/*
+Copyright 2017 Danny Nguyen <danny@hexwire.com>
+
+This program is free software: you can redistribute it and/or modify
+it under the terms of the GNU General Public License as published by
+the Free Software Foundation, either version 2 of the License, or
+(at your option) any later version.
+
+This program is distributed in the hope that it will be useful,
+but WITHOUT ANY WARRANTY; without even the implied warranty of
+MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+GNU General Public License for more details.
+
+You should have received a copy of the GNU General Public License
+along with this program.  If not, see <http://www.gnu.org/licenses/>.
+*/
+
+#ifndef CONFIG_H
+#define CONFIG_H
+
+#include "config_common.h"
+
+#endif  // CONFIG_H
+
+#undef  RGBLED_NUM
+#define RGBLIGHT_ANIMATIONS
+#define RGBLED_NUM 16
+
+#define TAPPING_TERM 100
\ No newline at end of file
diff --git a/keyboards/zen/keymaps/default/config.h b/keyboards/zen/keymaps/default/config.h
new file mode 100644
index 0000000000..38e4d73f0d
--- /dev/null
+++ b/keyboards/zen/keymaps/default/config.h
@@ -0,0 +1,41 @@
+/*
+Copyright 2017 Danny Nguyen <danny@hexwire.com>
+
+This program is free software: you can redistribute it and/or modify
+it under the terms of the GNU General Public License as published by
+the Free Software Foundation, either version 2 of the License, or
+(at your option) any later version.
+
+This program is distributed in the hope that it will be useful,
+but WITHOUT ANY WARRANTY; without even the implied warranty of
+MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+GNU General Public License for more details.
+
+You should have received a copy of the GNU General Public License
+along with this program.  If not, see <http://www.gnu.org/licenses/>.
+*/
+
+#ifndef CONFIG_USER_H
+#define CONFIG_USER_H
+
+#include "config_common.h"
+
+/* Use I2C or Serial, not both */
+
+#define USE_SERIAL
+// #define USE_I2C
+
+/* Select hand configuration */
+
+#define MASTER_LEFT
+// #define MASTER_RIGHT
+// #define EE_HANDS
+
+#undef RGBLED_NUM
+#define RGBLIGHT_ANIMATIONS
+#define RGBLED_NUM 16
+#define RGBLIGHT_HUE_STEP 8
+#define RGBLIGHT_SAT_STEP 8
+#define RGBLIGHT_VAL_STEP 8
+
+#endif
diff --git a/keyboards/zen/keymaps/default/keymap.c b/keyboards/zen/keymaps/default/keymap.c
new file mode 100644
index 0000000000..a955e892f4
--- /dev/null
+++ b/keyboards/zen/keymaps/default/keymap.c
@@ -0,0 +1,103 @@
+#include "zen.h"
+#include "action_layer.h"
+#include "eeconfig.h"
+
+extern keymap_config_t keymap_config;
+
+// Each layer gets a name for readability, which is then used in the keymap matrix below.
+// The underscores don't mean anything - you can have a layer called STUFF or any other name.
+// Layer names don't all need to be of the same length, obviously, and you can also skip them
+// entirely and just use numbers.
+#define _QWERTY 0
+#define _NAV 2
+
+
+enum custom_keycodes {
+  QWERTY = SAFE_RANGE,
+  NAV,
+
+};
+
+// Fillers to make layering more clear
+#define _______ KC_TRNS
+#define XXXXXXX KC_NO
+
+const uint16_t PROGMEM keymaps[][MATRIX_ROWS][MATRIX_COLS] = {
+
+/* Qwerty
+ * ,-----------------------------------------.             .-----------------------------------------.
+ * | GESC |   1  |   2  |   3  |   4  |   5  |             |   6  |   7  |   8  |   9  |   0  | Bksp |
+ * |------+------+------+------+------+------|             |------+------+------+------+------+------|
+ * | Tab  |   Q  |   W  |   E  |   R  |   T  |             |   Y  |   U  |   I  |   O  |   P  |   \  |
+ * |------+------+------+------+------+------|             |------+------+------+------+------+------|
+ * |CAPS(NAV)|A  |   S  |   D  |   F  |   G  |             |   H  |   J  |   K  |   L  |   ;  |  "   |
+ * |------+------+------+------+------+------|             |------+------+------+------+------+------|
+ * | Shift|   Z  |   X  |   C  |   V  |   B  |             |   N  |   M  |   ,  |   .  |   /  |Enter |
+ * |------+------+------+------+------+------+------..-----+------+------+------+------+------+------|
+ * | Ctrl | GUI  | Alt  |RGBTOG| NAV  |Space |Delete||Enter|Space |  NAV |   -  |   =  | PGUP | PGDN |
+ * `------------------------------------------------''-----------------------------------------------'
+ */
+[_QWERTY] = KEYMAP( \
+  KC_GESC,          KC_1,    KC_2,    KC_3,    KC_4,     KC_5,                       KC_6,     KC_7,     KC_8,    KC_9,    KC_0,    KC_BSPC, \
+  KC_TAB,           KC_Q,    KC_W,    KC_E,    KC_R,     KC_T,                       KC_Y,     KC_U,     KC_I,    KC_O,    KC_P,    KC_BSLS, \
+  LT(_NAV, KC_CAPS),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_LGUI, KC_LALT, RGB_TOG, MO(_NAV), KC_SPC,  KC_DEL,  KC_ENT,   KC_SPACE, MO(_NAV), KC_MINS, KC_EQL,  KC_PGUP, KC_PGDN \
+),
+
+/* NAV
+ * ,-----------------------------------------.             .-----------------------------------------.
+ * |  F1  |  F2  |  F3  |  F4  |  F5  |  F6  |             |  F7  |  F8  |  F9  |  F10 |  F11 | F12  |
+ * |------+------+------+------+------+------|             |------+------+------+------+------+------|
+ * |      |RGBSAI|RGBVAI|RGBSAD| RESET|  [   |             |   ]  | Pgup |  Up  | Pgdn |Insert| Home |
+ * |------+------+------+------+------+------|             |------+------+------+------+------+------|
+ * |      |RGBHUD|RGBVAD|RGBHUI|      |      |             |      | Left | Down | Right|Delete| End  |
+ * |------+------+------+------+------+------|             |------+------+------+------+------+------|
+ * |Shift |      |      |      |      |      |             | NKRO |      |      | Pause| Back | Next |
+ * |------+------+------+------+------+------+------..-----+------+------+------+------+------+------|
+ * | Ctrl | GUI  | Alt  |RGBMOD|      |      |      ||     |      |      |      | Mute | VOLUP| VOLDN|
+ * `------------------------------------------------''-----------------------------------------------'
+ */
+[_NAV] = KEYMAP( \
+  KC_F1,   KC_F2,   KC_F3,   KC_F4,   KC_F5,   KC_F6,                     KC_F7,             KC_F8,    KC_F9,   KC_F10,  KC_F11,  KC_F12 ,  \
+  KC_TRNS, RGB_SAI, RGB_VAI, RGB_SAD, RESET,   KC_LBRC,                   KC_RBRC,           KC_PGUP,  KC_UP,   KC_PGDN, KC_INS,  KC_HOME , \
+  KC_TRNS, RGB_HUD, RGB_VAD, RGB_HUI, KC_TRNS, KC_TRNS,                   KC_TRNS,           KC_LEFT,  KC_DOWN, KC_RGHT, KC_DEL,  KC_END , \
+  KC_LSFT, KC_TRNS, KC_TRNS, KC_TRNS, KC_TRNS, KC_TRNS,                   MAGIC_TOGGLE_NKRO, KC_TRNS,  KC_TRNS, KC_MPLY, KC_MPRV, KC_MNXT , \
+  KC_LCTL, KC_LGUI, KC_LALT, RGB_MOD, KC_TRNS, KC_TRNS, KC_TRNS, KC_TRNS, KC_TRNS,           KC_TRNS,  KC_TRNS, KC_MUTE, KC_VOLU, KC_VOLD \
+),
+
+};
+
+#ifdef AUDIO_ENABLE
+float tone_qwerty[][2]     = SONG(QWERTY_SOUND);
+float tone_colemak[][2]    = SONG(COLEMAK_SOUND);
+#endif
+
+void persistant_default_layer_set(uint16_t default_layer) {
+  eeconfig_update_default_layer(default_layer);
+  default_layer_set(default_layer);
+}
+
+bool process_record_user(uint16_t keycode, keyrecord_t *record) {
+  switch (keycode) {
+    case QWERTY:
+      if (record->event.pressed) {
+        #ifdef AUDIO_ENABLE
+          PLAY_NOTE_ARRAY(tone_qwerty, false, 0);
+        #endif
+        persistant_default_layer_set(1UL<<_QWERTY);
+      }
+      return false;
+      break;
+    //case COLEMAK:
+      //if (record->event.pressed) {
+        //#ifdef AUDIO_ENABLE
+          //PLAY_NOTE_ARRAY(tone_colemak, false, 0);
+        //#endif
+        //persistant_default_layer_set(1UL<<_COLEMAK);
+      //}
+      //return false;
+      //break;
+  }
+  return true;
+}
\ No newline at end of file
diff --git a/keyboards/zen/keymaps/default/rules.mk b/keyboards/zen/keymaps/default/rules.mk
new file mode 100644
index 0000000000..22b6ec4766
--- /dev/null
+++ b/keyboards/zen/keymaps/default/rules.mk
@@ -0,0 +1,6 @@
+RGBLIGHT_ENABLE = yes
+BACKLIGHT_ENABLE = yes
+
+ifndef QUANTUM_DIR
+	include ../../../../Makefile
+endif
diff --git a/keyboards/zen/matrix.c b/keyboards/zen/matrix.c
new file mode 100644
index 0000000000..12f22214e1
--- /dev/null
+++ b/keyboards/zen/matrix.c
@@ -0,0 +1,466 @@
+/*
+Copyright 2017 Danny Nguyen <danny@keeb.io>
+
+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/>.
+*/
+
+/*
+ * scan matrix
+ */
+#include <stdint.h>
+#include <stdbool.h>
+#include <avr/io.h>
+#include "wait.h"
+#include "print.h"
+#include "debug.h"
+#include "util.h"
+#include "matrix.h"
+#include "split_util.h"
+#include "pro_micro.h"
+#include "config.h"
+#include "timer.h"
+#include "backlight.h"
+
+#ifdef USE_I2C
+#  include "i2c.h"
+#else // USE_SERIAL
+#  include "serial.h"
+#endif
+
+#ifndef DEBOUNCING_DELAY
+#   define DEBOUNCING_DELAY 5
+#endif
+
+#if (DEBOUNCING_DELAY > 0)
+    static uint16_t debouncing_time;
+    static bool debouncing = false;
+#endif
+
+#if (MATRIX_COLS <= 8)
+#    define print_matrix_header()  print("\nr/c 01234567\n")
+#    define print_matrix_row(row)  print_bin_reverse8(matrix_get_row(row))
+#    define matrix_bitpop(i)       bitpop(matrix[i])
+#    define ROW_SHIFTER ((uint8_t)1)
+#else
+#    error "Currently only supports 8 COLS"
+#endif
+static matrix_row_t matrix_debouncing[MATRIX_ROWS];
+
+#define ERROR_DISCONNECT_COUNT 5
+
+#define SERIAL_LED_ADDR 0x00
+
+#define ROWS_PER_HAND (MATRIX_ROWS/2)
+
+static uint8_t error_count = 0;
+
+static const uint8_t row_pins[MATRIX_ROWS] = MATRIX_ROW_PINS;
+static const uint8_t col_pins[MATRIX_COLS] = MATRIX_COL_PINS;
+
+/* matrix state(1:on, 0:off) */
+static matrix_row_t matrix[MATRIX_ROWS];
+static matrix_row_t matrix_debouncing[MATRIX_ROWS];
+
+#if (DIODE_DIRECTION == COL2ROW)
+    static void init_cols(void);
+    static bool read_cols_on_row(matrix_row_t current_matrix[], uint8_t current_row);
+    static void unselect_rows(void);
+    static void select_row(uint8_t row);
+    static void unselect_row(uint8_t row);
+#elif (DIODE_DIRECTION == ROW2COL)
+    static void init_rows(void);
+    static bool read_rows_on_col(matrix_row_t current_matrix[], uint8_t current_col);
+    static void unselect_cols(void);
+    static void unselect_col(uint8_t col);
+    static void select_col(uint8_t col);
+#endif
+
+__attribute__ ((weak))
+void matrix_init_kb(void) {
+    matrix_init_user();
+}
+
+__attribute__ ((weak))
+void matrix_scan_kb(void) {
+    matrix_scan_user();
+}
+
+__attribute__ ((weak))
+void matrix_init_user(void) {
+}
+
+__attribute__ ((weak))
+void matrix_scan_user(void) {
+}
+
+inline
+uint8_t matrix_rows(void)
+{
+    return MATRIX_ROWS;
+}
+
+inline
+uint8_t matrix_cols(void)
+{
+    return MATRIX_COLS;
+}
+
+void matrix_init(void)
+{
+    debug_enable = true;
+    debug_matrix = true;
+    debug_mouse = true;
+    // initialize row and col
+    unselect_rows();
+    init_cols();
+
+    TX_RX_LED_INIT;
+
+    // initialize matrix state: all keys off
+    for (uint8_t i=0; i < MATRIX_ROWS; i++) {
+        matrix[i] = 0;
+        matrix_debouncing[i] = 0;
+    }
+
+
+}
+
+uint8_t _matrix_scan(void)
+{
+    int offset = isLeftHand ? 0 : (ROWS_PER_HAND);
+#if (DIODE_DIRECTION == COL2ROW)
+    // Set row, read cols
+    for (uint8_t current_row = 0; current_row < ROWS_PER_HAND; current_row++) {
+#       if (DEBOUNCING_DELAY > 0)
+            bool matrix_changed = read_cols_on_row(matrix_debouncing+offset, current_row);
+
+            if (matrix_changed) {
+                debouncing = true;
+                debouncing_time = timer_read();
+                PORTD ^= (1 << 2);
+            }
+
+#       else
+            read_cols_on_row(matrix+offset, current_row);
+#       endif
+
+    }
+
+#elif (DIODE_DIRECTION == ROW2COL)
+    // Set col, read rows
+    for (uint8_t current_col = 0; current_col < MATRIX_COLS; current_col++) {
+#       if (DEBOUNCING_DELAY > 0)
+            bool matrix_changed = read_rows_on_col(matrix_debouncing+offset, current_col);
+            if (matrix_changed) {
+                debouncing = true;
+                debouncing_time = timer_read();
+            }
+#       else
+             read_rows_on_col(matrix+offset, current_col);
+#       endif
+
+    }
+#endif
+
+#   if (DEBOUNCING_DELAY > 0)
+        if (debouncing && (timer_elapsed(debouncing_time) > DEBOUNCING_DELAY)) {
+            for (uint8_t i = 0; i < ROWS_PER_HAND; i++) {
+                matrix[i+offset] = matrix_debouncing[i+offset];
+            }
+            debouncing = false;
+        }
+#   endif
+
+    return 1;
+}
+
+#ifdef USE_I2C
+
+// Get rows from other half over i2c
+int i2c_transaction(void) {
+    int slaveOffset = (isLeftHand) ? (ROWS_PER_HAND) : 0;
+
+    int err = i2c_master_start(SLAVE_I2C_ADDRESS + I2C_WRITE);
+    if (err) goto i2c_error;
+
+    // start of matrix stored at 0x00
+    err = i2c_master_write(0x00);
+    if (err) goto i2c_error;
+
+    // Start read
+    err = i2c_master_start(SLAVE_I2C_ADDRESS + I2C_READ);
+    if (err) goto i2c_error;
+
+    if (!err) {
+        int i;
+        for (i = 0; i < ROWS_PER_HAND-1; ++i) {
+            matrix[slaveOffset+i] = i2c_master_read(I2C_ACK);
+        }
+        matrix[slaveOffset+i] = i2c_master_read(I2C_NACK);
+        i2c_master_stop();
+    } else {
+i2c_error: // the cable is disconnceted, or something else went wrong
+        i2c_reset_state();
+        return err;
+    }
+
+    return 0;
+}
+
+#else // USE_SERIAL
+
+int serial_transaction(void) {
+    int slaveOffset = (isLeftHand) ? (ROWS_PER_HAND) : 0;
+
+    if (serial_update_buffers()) {
+        return 1;
+    }
+
+    for (int i = 0; i < ROWS_PER_HAND; ++i) {
+        matrix[slaveOffset+i] = serial_slave_buffer[i];
+    }
+
+#ifdef BACKLIGHT_ENABLE
+    // Write backlight level for slave to read
+    serial_master_buffer[SERIAL_LED_ADDR] = get_backlight_level();
+#endif
+    return 0;
+}
+#endif
+
+uint8_t matrix_scan(void)
+{
+    uint8_t ret = _matrix_scan();
+
+#ifdef USE_I2C
+    if( i2c_transaction() ) {
+#else // USE_SERIAL
+    if( serial_transaction() ) {
+#endif
+        // turn on the indicator led when halves are disconnected
+        TXLED1;
+
+        error_count++;
+
+        if (error_count > ERROR_DISCONNECT_COUNT) {
+            // reset other half if disconnected
+            int slaveOffset = (isLeftHand) ? (ROWS_PER_HAND) : 0;
+            for (int i = 0; i < ROWS_PER_HAND; ++i) {
+                matrix[slaveOffset+i] = 0;
+            }
+        }
+    } else {
+        // turn off the indicator led on no error
+        TXLED0;
+        error_count = 0;
+    }
+    return ret;
+}
+
+void matrix_slave_scan(void) {
+    _matrix_scan();
+
+    int offset = (isLeftHand) ? 0 : ROWS_PER_HAND;
+
+#ifdef USE_I2C
+    for (int i = 0; i < ROWS_PER_HAND; ++i) {
+        i2c_slave_buffer[i] = matrix[offset+i];
+    }
+#else // USE_SERIAL
+    for (int i = 0; i < ROWS_PER_HAND; ++i) {
+        serial_slave_buffer[i] = matrix[offset+i];
+    }
+
+#ifdef BACKLIGHT_ENABLE
+    // Read backlight level sent from master and update level on slave
+    backlight_set(serial_master_buffer[SERIAL_LED_ADDR]);
+#endif
+#endif
+}
+
+bool matrix_is_modified(void)
+{
+    if (debouncing) return false;
+    return true;
+}
+
+inline
+bool matrix_is_on(uint8_t row, uint8_t col)
+{
+    return (matrix[row] & ((matrix_row_t)1<<col));
+}
+
+inline
+matrix_row_t matrix_get_row(uint8_t row)
+{
+    return matrix[row];
+}
+
+void matrix_print(void)
+{
+    print("\nr/c 0123456789ABCDEF\n");
+    for (uint8_t row = 0; row < MATRIX_ROWS; row++) {
+        phex(row); print(": ");
+        pbin_reverse16(matrix_get_row(row));
+        print("\n");
+    }
+}
+
+uint8_t matrix_key_count(void)
+{
+    uint8_t count = 0;
+    for (uint8_t i = 0; i < MATRIX_ROWS; i++) {
+        count += bitpop16(matrix[i]);
+    }
+    return count;
+}
+
+#if (DIODE_DIRECTION == COL2ROW)
+
+static void init_cols(void)
+{
+    for(uint8_t x = 0; x < MATRIX_COLS; x++) {
+        uint8_t pin = col_pins[x];
+        _SFR_IO8((pin >> 4) + 1) &= ~_BV(pin & 0xF); // IN
+        _SFR_IO8((pin >> 4) + 2) |=  _BV(pin & 0xF); // HI
+    }
+}
+
+static bool read_cols_on_row(matrix_row_t current_matrix[], uint8_t current_row)
+{
+    // Store last value of row prior to reading
+    matrix_row_t last_row_value = current_matrix[current_row];
+
+    // Clear data in matrix row
+    current_matrix[current_row] = 0;
+
+    // Select row and wait for row selecton to stabilize
+    select_row(current_row);
+    wait_us(30);
+
+    // For each col...
+    for(uint8_t col_index = 0; col_index < MATRIX_COLS; col_index++) {
+
+        // Select the col pin to read (active low)
+        uint8_t pin = col_pins[col_index];
+        uint8_t pin_state = (_SFR_IO8(pin >> 4) & _BV(pin & 0xF));
+
+        // Populate the matrix row with the state of the col pin
+        current_matrix[current_row] |=  pin_state ? 0 : (ROW_SHIFTER << col_index);
+    }
+
+    // Unselect row
+    unselect_row(current_row);
+
+    return (last_row_value != current_matrix[current_row]);
+}
+
+static void select_row(uint8_t row)
+{
+    uint8_t pin = row_pins[row];
+    _SFR_IO8((pin >> 4) + 1) |=  _BV(pin & 0xF); // OUT
+    _SFR_IO8((pin >> 4) + 2) &= ~_BV(pin & 0xF); // LOW
+}
+
+static void unselect_row(uint8_t row)
+{
+    uint8_t pin = row_pins[row];
+    _SFR_IO8((pin >> 4) + 1) &= ~_BV(pin & 0xF); // IN
+    _SFR_IO8((pin >> 4) + 2) |=  _BV(pin & 0xF); // HI
+}
+
+static void unselect_rows(void)
+{
+    for(uint8_t x = 0; x < ROWS_PER_HAND; x++) {
+        uint8_t pin = row_pins[x];
+        _SFR_IO8((pin >> 4) + 1) &= ~_BV(pin & 0xF); // IN
+        _SFR_IO8((pin >> 4) + 2) |=  _BV(pin & 0xF); // HI
+    }
+}
+
+#elif (DIODE_DIRECTION == ROW2COL)
+
+static void init_rows(void)
+{
+    for(uint8_t x = 0; x < ROWS_PER_HAND; x++) {
+        uint8_t pin = row_pins[x];
+        _SFR_IO8((pin >> 4) + 1) &= ~_BV(pin & 0xF); // IN
+        _SFR_IO8((pin >> 4) + 2) |=  _BV(pin & 0xF); // HI
+    }
+}
+
+static bool read_rows_on_col(matrix_row_t current_matrix[], uint8_t current_col)
+{
+    bool matrix_changed = false;
+
+    // Select col and wait for col selecton to stabilize
+    select_col(current_col);
+    wait_us(30);
+
+    // For each row...
+    for(uint8_t row_index = 0; row_index < ROWS_PER_HAND; row_index++)
+    {
+
+        // Store last value of row prior to reading
+        matrix_row_t last_row_value = current_matrix[row_index];
+
+        // Check row pin state
+        if ((_SFR_IO8(row_pins[row_index] >> 4) & _BV(row_pins[row_index] & 0xF)) == 0)
+        {
+            // Pin LO, set col bit
+            current_matrix[row_index] |= (ROW_SHIFTER << current_col);
+        }
+        else
+        {
+            // Pin HI, clear col bit
+            current_matrix[row_index] &= ~(ROW_SHIFTER << current_col);
+        }
+
+        // Determine if the matrix changed state
+        if ((last_row_value != current_matrix[row_index]) && !(matrix_changed))
+        {
+            matrix_changed = true;
+        }
+    }
+
+    // Unselect col
+    unselect_col(current_col);
+
+    return matrix_changed;
+}
+
+static void select_col(uint8_t col)
+{
+    uint8_t pin = col_pins[col];
+    _SFR_IO8((pin >> 4) + 1) |=  _BV(pin & 0xF); // OUT
+    _SFR_IO8((pin >> 4) + 2) &= ~_BV(pin & 0xF); // LOW
+}
+
+static void unselect_col(uint8_t col)
+{
+    uint8_t pin = col_pins[col];
+    _SFR_IO8((pin >> 4) + 1) &= ~_BV(pin & 0xF); // IN
+    _SFR_IO8((pin >> 4) + 2) |=  _BV(pin & 0xF); // HI
+}
+
+static void unselect_cols(void)
+{
+    for(uint8_t x = 0; x < MATRIX_COLS; x++) {
+        uint8_t pin = col_pins[x];
+        _SFR_IO8((pin >> 4) + 1) &= ~_BV(pin & 0xF); // IN
+        _SFR_IO8((pin >> 4) + 2) |=  _BV(pin & 0xF); // HI
+    }
+}
+
+#endif
diff --git a/keyboards/zen/readme.md b/keyboards/zen/readme.md
new file mode 100644
index 0000000000..36c63d2933
--- /dev/null
+++ b/keyboards/zen/readme.md
@@ -0,0 +1,12 @@
+Zen Keyboard
+====
+
+A split ergo keyboard with a few goals in mind:
+ - Be as thin as possible. Other split KBs (Let's Split, Nyquist, Iris) are 15.2mm thick. The Zen is only 8.0mm thick.
+ - Layout designed for gaming. 1.5u pinky keys, ortho alphas, and angled thumb keys. After trying Ortholiniear, Atreus62, and Ergodox, this is the best layout for gaming and typing.
+ - RGB backlighting. 16 WS2812b LEDs shine through the perimeter switches. The SK6812 variant are cheap and easy to solder.
+ - Price. Using Arduino Pro Micro, SK6812 LEDs, and PCB FR4 for the case, the cost of each half without switches or caps can be reduced to under $20 when purchased at volume.
+
+A build guide and more info for this keyboard can be found here: [Zen Build Guide](https://legonut.gitbooks.io/zen-keyboard/content/)
+
+Maintained by u/legonut3
\ No newline at end of file
diff --git a/keyboards/zen/rev1/config.h b/keyboards/zen/rev1/config.h
new file mode 100644
index 0000000000..efae558927
--- /dev/null
+++ b/keyboards/zen/rev1/config.h
@@ -0,0 +1,91 @@
+/*
+Copyright 2017 Danny Nguyen <danny@hexwire.com>
+
+This program is free software: you can redistribute it and/or modify
+it under the terms of the GNU General Public License as published by
+the Free Software Foundation, either version 2 of the License, or
+(at your option) any later version.
+
+This program is distributed in the hope that it will be useful,
+but WITHOUT ANY WARRANTY; without even the implied warranty of
+MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+GNU General Public License for more details.
+
+You should have received a copy of the GNU General Public License
+along with this program.  If not, see <http://www.gnu.org/licenses/>.
+*/
+
+#ifndef REV1_CONFIG_H
+#define REV1_CONFIG_H
+
+#include QMK_KEYBOARD_CONFIG_H
+
+/* USB Device descriptor parameter */
+#define VENDOR_ID       0xCEEB
+#define PRODUCT_ID      0x1256
+#define DEVICE_VER      0x0200
+#define MANUFACTURER    Legonut
+#define PRODUCT         Project Zen
+#define DESCRIPTION     Split gaming keyboard
+
+/* key matrix size */
+// Rows are doubled-up
+#define MATRIX_ROWS 10
+#define MATRIX_COLS 7
+
+// wiring of each half
+#define MATRIX_ROW_PINS { C6, D7, E6, B4, B5 }
+#define MATRIX_COL_PINS { B2, B3, B1, F7, F6, D4, B6 }
+
+/* COL2ROW or ROW2COL */
+#define DIODE_DIRECTION COL2ROW
+
+/* define if matrix has ghost */
+//#define MATRIX_HAS_GHOST
+
+/* number of backlight levels */
+// #define BACKLIGHT_LEVELS 3
+
+/* Set 0 if debouncing isn't needed */
+#define DEBOUNCING_DELAY 5
+
+/* 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
+
+/* key combination for command */
+#define IS_COMMAND() ( \
+    keyboard_report->mods == (MOD_BIT(KC_LSHIFT) | MOD_BIT(KC_RSHIFT)) \
+)
+
+#define BACKLIGHT_PIN F4
+#define BACKLIGHT_LEVELS 5
+
+
+/* ws2812 RGB LED */
+#define RGB_DI_PIN D1
+#define RGBLIGHT_TIMER
+#define RGBLED_NUM 16    // Number of LEDs
+#define ws2812_PORTREG  PORTD
+#define ws2812_DDRREG   DDRD
+
+/*
+ * 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
+
+#endif
diff --git a/keyboards/zen/rev1/rev1.c b/keyboards/zen/rev1/rev1.c
new file mode 100644
index 0000000000..5f4cd32f69
--- /dev/null
+++ b/keyboards/zen/rev1/rev1.c
@@ -0,0 +1,22 @@
+#include "rev1.h"
+
+#ifdef SSD1306OLED
+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);
+}
+#endif
+
+void matrix_init_kb(void) {
+
+    // // green led on
+    // DDRD |= (1<<5);
+    // PORTD &= ~(1<<5);
+
+    // // orange led on
+    // DDRB |= (1<<0);
+    // PORTB &= ~(1<<0);
+
+	matrix_init_user();
+};
+
diff --git a/keyboards/zen/rev1/rev1.h b/keyboards/zen/rev1/rev1.h
new file mode 100644
index 0000000000..4983bb2a30
--- /dev/null
+++ b/keyboards/zen/rev1/rev1.h
@@ -0,0 +1,40 @@
+#ifndef REV1_H
+#define REV1_H
+
+#include "zen.h"
+
+//void promicro_bootloader_jmp(bool program);
+#include "quantum.h"
+
+
+#ifdef USE_I2C
+#include <stddef.h>
+#ifdef __AVR__
+    #include <avr/io.h>
+    #include <avr/interrupt.h>
+#endif
+#endif
+
+//void promicro_bootloader_jmp(bool program);
+
+#define KEYMAP( \
+    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, \
+    k40, k41, k42, k43, k44, k45, k46,   k96,   k95, k94, k93, k92, k91, k90 \
+    ) \
+    { \
+        { k00, k01, k02, k03, k04, k05, KC_NO }, \
+        { k10, k11, k12, k13, k14, k15, KC_NO }, \
+        { k20, k21, k22, k23, k24, k25, KC_NO }, \
+        { k30, k31, k32, k33, k34, k35, KC_NO }, \
+        { k40, k41, k42, k43, k44, k45, k46 }, \
+        { k50, k51, k52, k53, k54, k55, KC_NO }, \
+        { k60, k61, k62, k63, k64, k65, KC_NO }, \
+        { k70, k71, k72, k73, k74, k75, KC_NO }, \
+        { k80, k81, k82, k83, k84, k85, KC_NO }, \
+        { k90, k91, k92, k93, k94, k95, k96 } \
+    }
+
+#endif
diff --git a/keyboards/zen/rev1/rules.mk b/keyboards/zen/rev1/rules.mk
new file mode 100644
index 0000000000..d7463419b4
--- /dev/null
+++ b/keyboards/zen/rev1/rules.mk
@@ -0,0 +1,2 @@
+RGBLIGHT_ENABLE = yes
+BACKLIGHT_ENABLE = yes
diff --git a/keyboards/zen/rules.mk b/keyboards/zen/rules.mk
new file mode 100644
index 0000000000..32d3dc51c8
--- /dev/null
+++ b/keyboards/zen/rules.mk
@@ -0,0 +1,73 @@
+SRC += matrix.c \
+	   split_util.c \
+	   serial.c
+
+# MCU name
+#MCU = at90usb1287
+MCU = atmega32u4
+
+# Processor frequency.
+#     This will define a symbol, F_CPU, in all source code files equal to the
+#     processor frequency in Hz. You can then use this symbol in your source code to
+#     calculate timings. Do NOT tack on a 'UL' at the end, this will be done
+#     automatically to create a 32-bit value in your source code.
+#
+#     This will be an integer division of F_USB below, as it is sourced by
+#     F_USB after it has run through any CPU prescalers. Note that this value
+#     does not *change* the processor frequency - it should merely be updated to
+#     reflect the processor speed set externally so that the code can use accurate
+#     software delays.
+F_CPU = 16000000
+
+#
+# LUFA specific
+#
+# Target architecture (see library "Board Types" documentation).
+ARCH = AVR8
+
+# Input clock frequency.
+#     This will define a symbol, F_USB, in all source code files equal to the
+#     input clock frequency (before any prescaling is performed) in Hz. This value may
+#     differ from F_CPU if prescaling is used on the latter, and is required as the
+#     raw input clock is fed directly to the PLL sections of the AVR for high speed
+#     clock generation for the USB and other AVR subsections. Do NOT tack on a 'UL'
+#     at the end, this will be done automatically to create a 32-bit value in your
+#     source code.
+#
+#     If no clock division is performed on the input clock inside the AVR (via the
+#     CPU clock adjust registers or the clock division fuses), this will be equal to F_CPU.
+F_USB = $(F_CPU)
+
+# Bootloader
+#     This definition is optional, and if your keyboard supports multiple bootloaders of
+#     different sizes, comment this out, and the correct address will be loaded 
+#     automatically (+60). See bootloader.mk for all options.
+BOOTLOADER = caterina
+
+# Interrupt driven control endpoint task(+60)
+OPT_DEFS += -DINTERRUPT_CONTROL_ENDPOINT
+
+# Build Options
+#   change to "no" to disable the options, or define them in the Makefile in
+#   the appropriate keymap folder that will get included automatically
+#
+BOOTMAGIC_ENABLE = no       # Virtual DIP switch configuration(+1000)
+MOUSEKEY_ENABLE = yes       # Mouse keys(+4700)
+EXTRAKEY_ENABLE = yes       # Audio control and System control(+450)
+CONSOLE_ENABLE = no         # Console for debug(+400)
+COMMAND_ENABLE = yes        # Commands for debug and configuration
+NKRO_ENABLE = no            # Nkey Rollover - if this doesn't work, see here: https://github.com/tmk/tmk_keyboard/wiki/FAQ#nkro-doesnt-work
+BACKLIGHT_ENABLE = yes      # Enable keyboard backlight functionality
+MIDI_ENABLE = no            # MIDI controls
+AUDIO_ENABLE = no           # Audio output on port C6
+UNICODE_ENABLE = no         # Unicode
+BLUETOOTH_ENABLE = no       # Enable Bluetooth with the Adafruit EZ-Key HID
+RGBLIGHT_ENABLE = yes       # Enable WS2812 RGB underlight.  Do not enable this with audio at the same time.
+SUBPROJECT_rev1 = yes
+USE_I2C = no
+# Do not enable SLEEP_LED_ENABLE. it uses the same timer as BACKLIGHT_ENABLE
+SLEEP_LED_ENABLE = no    # Breathing sleep LED during USB suspend
+
+CUSTOM_MATRIX = yes
+
+DEFAULT_FOLDER = zen/rev1
diff --git a/keyboards/zen/serial.c b/keyboards/zen/serial.c
new file mode 100644
index 0000000000..74bcbb6bf6
--- /dev/null
+++ b/keyboards/zen/serial.c
@@ -0,0 +1,228 @@
+/*
+ * WARNING: be careful changing this code, it is very timing dependent
+ */
+
+#ifndef F_CPU
+#define F_CPU 16000000
+#endif
+
+#include <avr/io.h>
+#include <avr/interrupt.h>
+#include <util/delay.h>
+#include <stdbool.h>
+#include "serial.h"
+
+#ifndef USE_I2C
+
+// Serial pulse period in microseconds. Its probably a bad idea to lower this
+// value.
+#define SERIAL_DELAY 24
+
+uint8_t volatile serial_slave_buffer[SERIAL_SLAVE_BUFFER_LENGTH] = {0};
+uint8_t volatile serial_master_buffer[SERIAL_MASTER_BUFFER_LENGTH] = {0};
+
+#define SLAVE_DATA_CORRUPT (1<<0)
+volatile uint8_t status = 0;
+
+inline static
+void serial_delay(void) {
+  _delay_us(SERIAL_DELAY);
+}
+
+inline static
+void serial_output(void) {
+  SERIAL_PIN_DDR |= SERIAL_PIN_MASK;
+}
+
+// make the serial pin an input with pull-up resistor
+inline static
+void serial_input(void) {
+  SERIAL_PIN_DDR  &= ~SERIAL_PIN_MASK;
+  SERIAL_PIN_PORT |= SERIAL_PIN_MASK;
+}
+
+inline static
+uint8_t serial_read_pin(void) {
+  return !!(SERIAL_PIN_INPUT & SERIAL_PIN_MASK);
+}
+
+inline static
+void serial_low(void) {
+  SERIAL_PIN_PORT &= ~SERIAL_PIN_MASK;
+}
+
+inline static
+void serial_high(void) {
+  SERIAL_PIN_PORT |= SERIAL_PIN_MASK;
+}
+
+void serial_master_init(void) {
+  serial_output();
+  serial_high();
+}
+
+void serial_slave_init(void) {
+  serial_input();
+
+  // Enable INT0
+  EIMSK |= _BV(INT0);
+  // Trigger on falling edge of INT0
+  EICRA &= ~(_BV(ISC00) | _BV(ISC01));
+}
+
+// Used by the master to synchronize timing with the slave.
+static
+void sync_recv(void) {
+  serial_input();
+  // This shouldn't hang if the slave disconnects because the
+  // serial line will float to high if the slave does disconnect.
+  while (!serial_read_pin());
+  serial_delay();
+}
+
+// Used by the slave to send a synchronization signal to the master.
+static
+void sync_send(void) {
+  serial_output();
+
+  serial_low();
+  serial_delay();
+
+  serial_high();
+}
+
+// Reads a byte from the serial line
+static
+uint8_t serial_read_byte(void) {
+  uint8_t byte = 0;
+  serial_input();
+  for ( uint8_t i = 0; i < 8; ++i) {
+    byte = (byte << 1) | serial_read_pin();
+    serial_delay();
+    _delay_us(1);
+  }
+
+  return byte;
+}
+
+// Sends a byte with MSB ordering
+static
+void serial_write_byte(uint8_t data) {
+  uint8_t b = 8;
+  serial_output();
+  while( b-- ) {
+    if(data & (1 << b)) {
+      serial_high();
+    } else {
+      serial_low();
+    }
+    serial_delay();
+  }
+}
+
+// interrupt handle to be used by the slave device
+ISR(SERIAL_PIN_INTERRUPT) {
+  sync_send();
+
+  uint8_t checksum = 0;
+  for (int i = 0; i < SERIAL_SLAVE_BUFFER_LENGTH; ++i) {
+    serial_write_byte(serial_slave_buffer[i]);
+    sync_send();
+    checksum += serial_slave_buffer[i];
+  }
+  serial_write_byte(checksum);
+  sync_send();
+
+  // wait for the sync to finish sending
+  serial_delay();
+
+  // read the middle of pulses
+  _delay_us(SERIAL_DELAY/2);
+
+  uint8_t checksum_computed = 0;
+  for (int i = 0; i < SERIAL_MASTER_BUFFER_LENGTH; ++i) {
+    serial_master_buffer[i] = serial_read_byte();
+    sync_send();
+    checksum_computed += serial_master_buffer[i];
+  }
+  uint8_t checksum_received = serial_read_byte();
+  sync_send();
+
+  serial_input(); // end transaction
+
+  if ( checksum_computed != checksum_received ) {
+    status |= SLAVE_DATA_CORRUPT;
+  } else {
+    status &= ~SLAVE_DATA_CORRUPT;
+  }
+}
+
+inline
+bool serial_slave_DATA_CORRUPT(void) {
+  return status & SLAVE_DATA_CORRUPT;
+}
+
+// Copies the serial_slave_buffer to the master and sends the
+// serial_master_buffer to the slave.
+//
+// Returns:
+// 0 => no error
+// 1 => slave did not respond
+int serial_update_buffers(void) {
+  // this code is very time dependent, so we need to disable interrupts
+  cli();
+
+  // signal to the slave that we want to start a transaction
+  serial_output();
+  serial_low();
+  _delay_us(1);
+
+  // wait for the slaves response
+  serial_input();
+  serial_high();
+  _delay_us(SERIAL_DELAY);
+
+  // check if the slave is present
+  if (serial_read_pin()) {
+    // slave failed to pull the line low, assume not present
+    sei();
+    return 1;
+  }
+
+  // if the slave is present syncronize with it
+  sync_recv();
+
+  uint8_t checksum_computed = 0;
+  // receive data from the slave
+  for (int i = 0; i < SERIAL_SLAVE_BUFFER_LENGTH; ++i) {
+    serial_slave_buffer[i] = serial_read_byte();
+    sync_recv();
+    checksum_computed += serial_slave_buffer[i];
+  }
+  uint8_t checksum_received = serial_read_byte();
+  sync_recv();
+
+  if (checksum_computed != checksum_received) {
+    sei();
+    return 1;
+  }
+
+  uint8_t checksum = 0;
+  // send data to the slave
+  for (int i = 0; i < SERIAL_MASTER_BUFFER_LENGTH; ++i) {
+    serial_write_byte(serial_master_buffer[i]);
+    sync_recv();
+    checksum += serial_master_buffer[i];
+  }
+  serial_write_byte(checksum);
+  sync_recv();
+
+  // always, release the line when not in use
+  serial_output();
+  serial_high();
+
+  sei();
+  return 0;
+}
+
+#endif
diff --git a/keyboards/zen/serial.h b/keyboards/zen/serial.h
new file mode 100644
index 0000000000..15fe4db7b4
--- /dev/null
+++ b/keyboards/zen/serial.h
@@ -0,0 +1,26 @@
+#ifndef MY_SERIAL_H
+#define MY_SERIAL_H
+
+#include "config.h"
+#include <stdbool.h>
+
+/* TODO:  some defines for interrupt setup */
+#define SERIAL_PIN_DDR DDRD
+#define SERIAL_PIN_PORT PORTD
+#define SERIAL_PIN_INPUT PIND
+#define SERIAL_PIN_MASK _BV(PD0)
+#define SERIAL_PIN_INTERRUPT INT0_vect
+
+#define SERIAL_SLAVE_BUFFER_LENGTH MATRIX_ROWS/2
+#define SERIAL_MASTER_BUFFER_LENGTH 1
+
+// Buffers for master - slave communication
+extern volatile uint8_t serial_slave_buffer[SERIAL_SLAVE_BUFFER_LENGTH];
+extern volatile uint8_t serial_master_buffer[SERIAL_MASTER_BUFFER_LENGTH];
+
+void serial_master_init(void);
+void serial_slave_init(void);
+int serial_update_buffers(void);
+bool serial_slave_data_corrupt(void);
+
+#endif
diff --git a/keyboards/zen/split_rgb.c b/keyboards/zen/split_rgb.c
new file mode 100644
index 0000000000..6d7cb44cf0
--- /dev/null
+++ b/keyboards/zen/split_rgb.c
@@ -0,0 +1,41 @@
+#include <stdint.h>
+#include <stdbool.h>
+#include "split_util.h"
+#include "progmem.h"
+#include "print.h"
+#include "rgblight.h"
+
+#ifdef USE_I2C
+#  include "i2c.h"
+#else // USE_SERIAL
+#  include "serial.h"
+#endif
+
+
+rgblight_config_t rgblight_config;
+
+void rgblight_slave_update(void) {
+  //rgblight_effect_christmas();
+}
+
+
+void rgblight_set(void) {
+  if (rgblight_config.enable) {
+    #ifdef RGBW
+      ws2812_setleds_rgbw(led, RGBLED_NUM);
+    #else
+      ws2812_setleds(led, RGBLED_NUM);
+    #endif
+  } else {
+    for (uint8_t i = 0; i < RGBLED_NUM; i++) {
+      led[i].r = 0;
+      led[i].g = 0;
+      led[i].b = 0;
+    }
+    #ifdef RGBW
+      ws2812_setleds_rgbw(led, RGBLED_NUM);
+    #else
+      ws2812_setleds(led, RGBLED_NUM);
+    #endif
+  }
+}
diff --git a/keyboards/zen/split_rgb.h b/keyboards/zen/split_rgb.h
new file mode 100644
index 0000000000..5f552890af
--- /dev/null
+++ b/keyboards/zen/split_rgb.h
@@ -0,0 +1,6 @@
+#ifndef SPLIT_RGB_H
+#define SPLIT_RGB_H
+
+void rgblight_slave_update(void);
+
+#endif
diff --git a/keyboards/zen/split_util.c b/keyboards/zen/split_util.c
new file mode 100644
index 0000000000..346cbc9089
--- /dev/null
+++ b/keyboards/zen/split_util.c
@@ -0,0 +1,86 @@
+#include <avr/io.h>
+#include <avr/wdt.h>
+#include <avr/power.h>
+#include <avr/interrupt.h>
+#include <util/delay.h>
+#include <avr/eeprom.h>
+#include "split_util.h"
+#include "matrix.h"
+#include "keyboard.h"
+#include "config.h"
+#include "timer.h"
+
+#ifdef USE_I2C
+#  include "i2c.h"
+#else
+#  include "serial.h"
+#endif
+
+volatile bool isLeftHand = true;
+
+static void setup_handedness(void) {
+  #ifdef EE_HANDS
+    isLeftHand = eeprom_read_byte(EECONFIG_HANDEDNESS);
+  #else
+    // I2C_MASTER_RIGHT is deprecated, use MASTER_RIGHT instead, since this works for both serial and i2c
+    #if defined(I2C_MASTER_RIGHT) || defined(MASTER_RIGHT)
+      isLeftHand = !has_usb();
+    #else
+      isLeftHand = has_usb();
+    #endif
+  #endif
+}
+
+static void keyboard_master_setup(void) {
+#ifdef USE_I2C
+    i2c_master_init();
+#ifdef SSD1306OLED
+    matrix_master_OLED_init ();
+#endif
+#else
+    serial_master_init();
+#endif
+}
+
+static void keyboard_slave_setup(void) {
+  timer_init();
+#ifdef USE_I2C
+    i2c_slave_init(SLAVE_I2C_ADDRESS);
+#else
+    serial_slave_init();
+#endif
+}
+
+bool has_usb(void) {
+   USBCON |= (1 << OTGPADE); //enables VBUS pad
+   _delay_us(5);
+   return (USBSTA & (1<<VBUS));  //checks state of VBUS
+}
+
+void split_keyboard_setup(void) {
+   setup_handedness();
+
+   if (has_usb()) {
+      keyboard_master_setup();
+   } else {
+      keyboard_slave_setup();
+   }
+   sei();
+}
+
+void keyboard_slave_loop(void) {
+   matrix_init();
+
+   while (1) {
+      matrix_slave_scan();
+   }
+}
+
+// this code runs before the usb and keyboard is initialized
+void matrix_setup(void) {
+    split_keyboard_setup();
+
+    if (!has_usb()) {
+        keyboard_slave_loop();
+    }
+}
diff --git a/keyboards/zen/split_util.h b/keyboards/zen/split_util.h
new file mode 100644
index 0000000000..595a0659e1
--- /dev/null
+++ b/keyboards/zen/split_util.h
@@ -0,0 +1,20 @@
+#ifndef SPLIT_KEYBOARD_UTIL_H
+#define SPLIT_KEYBOARD_UTIL_H
+
+#include <stdbool.h>
+#include "eeconfig.h"
+
+#define SLAVE_I2C_ADDRESS           0x32
+
+extern volatile bool isLeftHand;
+
+// slave version of matix scan, defined in matrix.c
+void matrix_slave_scan(void);
+
+void split_keyboard_setup(void);
+bool has_usb(void);
+void keyboard_slave_loop(void);
+
+void matrix_master_OLED_init (void);
+
+#endif
diff --git a/keyboards/zen/zen.c b/keyboards/zen/zen.c
new file mode 100644
index 0000000000..22131ef5c7
--- /dev/null
+++ b/keyboards/zen/zen.c
@@ -0,0 +1 @@
+#include "zen.h"
diff --git a/keyboards/zen/zen.h b/keyboards/zen/zen.h
new file mode 100644
index 0000000000..4560ff8cda
--- /dev/null
+++ b/keyboards/zen/zen.h
@@ -0,0 +1,23 @@
+#ifndef ZEN_H
+#define ZEN_H
+
+#include "rev1.h"
+#include "quantum.h"
+
+// Used to create a keymap using only KC_ prefixed keys
+#define KC_KEYMAP( \
+    L00, L01, L02, L03, L04, L05,           R01, R02, R03, R04, R05, R06,\
+    L10, L11, L12, L13, L14, L15,           R11, R12, R13, R14, R15, R16,\
+    L20, L21, L22, L23, L24, L25,           R21, R22, R23, R24, R25, R26,\
+    L30, L31, L32, L33, L34, L35,           R31, R32, R33, R34, R35, R36,\
+    L40, L41, L42, L43, L44, L45, L46, R40, R41, R42, R43, R44, R45, R46 \
+    ) \
+    KEYMAP( \
+        KC_##L00, KC_##L01, KC_##L02, KC_##L03, KC_##L04, KC_##L05,                     KC_##R01, KC_##R02, KC_##R03, KC_##R04, KC_##R05, KC_##R06, \
+        KC_##L10, KC_##L11, KC_##L12, KC_##L13, KC_##L14, KC_##L15,                     KC_##R11, KC_##R12, KC_##R13, KC_##R14, KC_##R15, KC_##R16, \
+        KC_##L20, KC_##L21, KC_##L22, KC_##L23, KC_##L24, KC_##L25,                     KC_##R21, KC_##R22, KC_##R23, KC_##R24, KC_##R25, KC_##R26, \
+        KC_##L30, KC_##L31, KC_##L32, KC_##L33, KC_##L34, KC_##L35,                     KC_##R31, KC_##R32, KC_##R33, KC_##R34, KC_##R35, KC_##R36, \
+        KC_##L40, KC_##L41, KC_##L42, KC_##L43, KC_##L44, KC_##L45, KC_##L46, KC_##R40, KC_##R41, KC_##R42, KC_##R43, KC_##R44, KC_##R45, KC_##R46, \
+    )
+
+#endif
\ No newline at end of file