diff --git a/keyboards/model01/config.h b/keyboards/model01/config.h
new file mode 100644
index 000000000..796653f45
--- /dev/null
+++ b/keyboards/model01/config.h
@@ -0,0 +1,35 @@
+/*
+Copyright 2018 James Laird-Wah
+
+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 .
+*/
+
+#pragma once
+
+#include
+
+/* USB Device descriptor parameter */
+#define VENDOR_ID 0x1209
+#define PRODUCT_ID 0x2301
+#define DEVICE_VER 0x0001
+#define MANUFACTURER Keyboardio
+#define PRODUCT Model 01
+#define DESCRIPTION (QMK)
+
+/* key matrix size; rows are doubled for split */
+#define MATRIX_ROWS 8
+#define MATRIX_COLS 8
+
+/* The scanners already debounce for us */
+#define DEBOUNCING_DELAY 0
diff --git a/keyboards/model01/info.json b/keyboards/model01/info.json
new file mode 100644
index 000000000..daf51492d
--- /dev/null
+++ b/keyboards/model01/info.json
@@ -0,0 +1,4 @@
+{
+ "keyboard_name": "model01",
+ "url": "https://keyboard.io"
+}
diff --git a/keyboards/model01/keymaps/default/config.h b/keyboards/model01/keymaps/default/config.h
new file mode 100644
index 000000000..8ab9d8b02
--- /dev/null
+++ b/keyboards/model01/keymaps/default/config.h
@@ -0,0 +1,19 @@
+/* Copyright 2018 James Laird-Wah
+ *
+ * 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 .
+ */
+
+#pragma once
+
+/* place overrides here */
diff --git a/keyboards/model01/keymaps/default/keymap.c b/keyboards/model01/keymaps/default/keymap.c
new file mode 100644
index 000000000..cdc050cd9
--- /dev/null
+++ b/keyboards/model01/keymaps/default/keymap.c
@@ -0,0 +1,93 @@
+/* Copyright 2018 James Laird-Wah
+ *
+ * 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 .
+ */
+#include QMK_KEYBOARD_H
+
+/* layer constants */
+enum {
+ DEF = 0,
+ NUM,
+ FUN,
+};
+
+
+const uint16_t PROGMEM keymaps[][MATRIX_ROWS][MATRIX_COLS] = {
+[DEF] = LAYOUT(
+ RESET , KC_1 , KC_2 , KC_3 , KC_4 , KC_5 , KC_6 , KC_7 , KC_8 , KC_9 , KC_0 , TG(NUM),
+ KC_GRV , KC_Q , KC_W , KC_E , KC_R , KC_T , _______, _______, KC_Y , KC_U , KC_I , KC_O , KC_P , KC_EQL ,
+ KC_PGUP, KC_A , KC_S , KC_D , KC_F , KC_G , KC_TAB , KC_ENT , KC_H , KC_J , KC_K , KC_L , KC_SCLN, KC_QUOT,
+ KC_PGDN, KC_Z , KC_X , KC_C , KC_V , KC_B , KC_ESC , _______, KC_N , KC_M , KC_COMM, KC_DOT , KC_SLSH, KC_MINS,
+ KC_LCTL, KC_RCTL,
+ KC_BSPC, KC_SPC ,
+ KC_LGUI, KC_RALT,
+ KC_LSFT, KC_RSFT,
+ MO(FUN), MO(FUN)
+ ),
+[NUM] = LAYOUT(
+ _______, _______, _______, _______, _______, _______, _______, KC_P7 , KC_P8 , KC_P9 , KC_PMNS, _______,
+ _______, _______, _______, _______, _______, _______, _______, _______, _______, KC_P4 , KC_P5 , KC_P6 , KC_PPLS, _______,
+ _______, _______, _______, _______, _______, _______, _______, _______, _______, KC_P1 , KC_P2 , KC_P3 , KC_PEQL, _______,
+ _______, _______, _______, _______, _______, _______, _______, _______, _______, KC_P0 , KC_PDOT, KC_PAST, KC_PSLS, KC_PENT,
+ _______, _______,
+ _______, _______,
+ _______, _______,
+ _______, _______,
+ _______, _______
+ ),
+[FUN] = LAYOUT(
+ _______, KC_F1 , KC_F2 , KC_F3 , KC_F4 , KC_F5 , KC_F6 , KC_F7 , KC_F8 , KC_F9 , KC_F10 , KC_F11 ,
+ KC_TAB , _______, KC_MS_U, _______, KC_BTN3, _______, _______, KC_MPRV, KC_MNXT, KC_LCBR, KC_RCBR, KC_LBRC, KC_RBRC, KC_F12 ,
+ KC_HOME, KC_MS_L, KC_MS_D, KC_MS_R, KC_BTN1, _______, _______, KC_MPLY, KC_LEFT, KC_DOWN, KC_UP , KC_RGHT, _______, _______,
+ KC_END , KC_PSCR, KC_INS , _______, KC_BTN2, _______, _______, _______, KC_MUTE, KC_VOLD, KC_VOLU, _______, KC_BSLS, KC_PIPE,
+ _______, _______,
+ KC_DEL , KC_ENT ,
+ _______, _______,
+ _______, _______,
+ _______, _______
+ )
+};
+
+/* template for new layouts:
+LAYOUT(
+ _______, _______, _______, _______, _______, _______, _______, _______, _______, _______, _______, _______,
+ _______, _______, _______, _______, _______, _______, _______, _______, _______, _______, _______, _______, _______, _______,
+ _______, _______, _______, _______, _______, _______, _______, _______, _______, _______, _______, _______, _______, _______,
+ _______, _______, _______, _______, _______, _______, _______, _______, _______, _______, _______, _______, _______, _______,
+ _______, _______,
+ _______, _______,
+ _______, _______,
+ _______, _______,
+ _______, _______
+ )
+*/
+
+uint32_t layer_state_set_user(uint32_t state) {
+ switch (biton32(state)) {
+ case DEF:
+ set_all_leds_to(0,0,0);
+ break;
+ case NUM:
+ /* highlight the numpad keys when numlock is on */
+ for (int i=44; i<=60; i++) {
+ set_led_to(i, 128,0,0);
+ }
+ set_led_to(63, 128, 0, 0);
+ break;
+ }
+
+ return state;
+}
+
+/* vim: set ts=2 sw=2 et: */
diff --git a/keyboards/model01/keymaps/default/readme.md b/keyboards/model01/keymaps/default/readme.md
new file mode 100644
index 000000000..740515a26
--- /dev/null
+++ b/keyboards/model01/keymaps/default/readme.md
@@ -0,0 +1,3 @@
+# The default keymap for Keyboardio's Model01
+
+This implements all of their default keymap, except for mouse warping.
diff --git a/keyboards/model01/keymaps/default/rules.mk b/keyboards/model01/keymaps/default/rules.mk
new file mode 100644
index 000000000..4d1abd88a
--- /dev/null
+++ b/keyboards/model01/keymaps/default/rules.mk
@@ -0,0 +1,2 @@
+# used by default keymap
+MOUSEKEY_ENABLE = yes # Mouse keys(+4700)
diff --git a/keyboards/model01/leds.c b/keyboards/model01/leds.c
new file mode 100644
index 000000000..b80a749a7
--- /dev/null
+++ b/keyboards/model01/leds.c
@@ -0,0 +1,57 @@
+/* Copyright 2018 James Laird-Wah
+ *
+ * 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 .
+ */
+#include
+#include
+#include
+#include "model01.h"
+
+#define I2C_TIMEOUT 1000
+
+#define LINCOR(i) pgm_read_byte(&CIE1931_CURVE[i])
+
+int set_all_leds_to_raw(uint8_t r, uint8_t g, uint8_t b) {
+ uint8_t buf[] = {
+ TWI_CMD_LED_SET_ALL_TO,
+ b, g, r
+ };
+ int ret = 0;
+ ret |= i2c_transmit(I2C_ADDR(LEFT), buf, sizeof(buf), I2C_TIMEOUT);
+ ret |= i2c_transmit(I2C_ADDR(RIGHT), buf, sizeof(buf), I2C_TIMEOUT);
+ _delay_us(10);
+ return ret;
+}
+
+int set_all_leds_to(uint8_t r, uint8_t g, uint8_t b) {
+ return set_all_leds_to_raw(LINCOR(r), LINCOR(g), LINCOR(b));
+}
+
+int set_led_to_raw(uint8_t led, uint8_t r, uint8_t g, uint8_t b) {
+ uint8_t buf[] = {
+ TWI_CMD_LED_SET_ONE_TO,
+ led & 0x1f,
+ b, g, r
+ };
+ int hand = (led >= 32) ? RIGHT : LEFT;
+ int ret = i2c_transmit(I2C_ADDR(hand), buf, sizeof(buf), I2C_TIMEOUT);
+ _delay_us(10);
+ return ret;
+}
+
+int set_led_to(uint8_t led, uint8_t r, uint8_t g, uint8_t b) {
+ return set_led_to_raw(led, LINCOR(r), LINCOR(g), LINCOR(b));
+}
+
+/* vim: set ts=2 sw=2 et: */
diff --git a/keyboards/model01/leds.h b/keyboards/model01/leds.h
new file mode 100644
index 000000000..0aac781dd
--- /dev/null
+++ b/keyboards/model01/leds.h
@@ -0,0 +1,25 @@
+/* Copyright 2018 James Laird-Wah
+ *
+ * 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 .
+ */
+#pragma once
+
+#include
+
+int set_all_leds_to(uint8_t r, uint8_t g, uint8_t b);
+int set_led_to(uint8_t led, uint8_t r, uint8_t g, uint8_t b);
+
+/* Raw (gamma uncorrected) LED values */
+int set_all_leds_to_raw(uint8_t r, uint8_t g, uint8_t b);
+int set_led_to_raw(uint8_t led, uint8_t r, uint8_t g, uint8_t b);
diff --git a/keyboards/model01/matrix.c b/keyboards/model01/matrix.c
new file mode 100644
index 000000000..f1f9024c7
--- /dev/null
+++ b/keyboards/model01/matrix.c
@@ -0,0 +1,94 @@
+/* Copyright 2018 James Laird-Wah
+ *
+ * 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 .
+ */
+#include
+#include
+#include
+#include "model01.h"
+
+/* If no key events have occurred, the scanners will time out on reads.
+ * So we don't want to be too permissive here. */
+#define I2C_TIMEOUT 10
+
+static matrix_row_t rows[MATRIX_ROWS];
+#define ROWS_PER_HAND (MATRIX_ROWS / 2)
+
+inline
+uint8_t matrix_rows(void) {
+ return MATRIX_ROWS;
+}
+
+inline
+uint8_t matrix_cols(void) {
+ return MATRIX_COLS;
+}
+
+static int i2c_read_hand(int hand) {
+ uint8_t buf[5];
+ i2c_status_t ret = i2c_receive(I2C_ADDR(hand), buf, sizeof(buf), I2C_TIMEOUT);
+ if (ret != I2C_STATUS_SUCCESS)
+ return 1;
+
+ if (buf[0] != TWI_REPLY_KEYDATA)
+ return 2;
+
+ int start_row = hand ? ROWS_PER_HAND : 0;
+ uint8_t *out = &rows[start_row];
+ memcpy(out, &buf[1], 4);
+ return 0;
+}
+
+static int i2c_set_keyscan_interval(int hand, int delay) {
+ uint8_t buf[] = {TWI_CMD_KEYSCAN_INTERVAL, delay};
+ i2c_status_t ret = i2c_transmit(I2C_ADDR(hand), buf, sizeof(buf), I2C_TIMEOUT);
+ return ret;
+}
+
+void matrix_init(void) {
+ /* Ensure scanner power is on - else right hand will not work */
+ DDRC |= _BV(7);
+ PORTC |= _BV(7);
+
+ i2c_init();
+ i2c_set_keyscan_interval(LEFT, 2);
+ i2c_set_keyscan_interval(RIGHT, 2);
+ memset(rows, 0, sizeof(rows));
+
+ matrix_init_quantum();
+}
+
+uint8_t matrix_scan(void) {
+ uint8_t ret = 0;
+ ret |= i2c_read_hand(LEFT);
+ ret |= i2c_read_hand(RIGHT);
+ matrix_scan_quantum();
+ return ret;
+}
+
+inline
+matrix_row_t matrix_get_row(uint8_t row) {
+ return rows[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");
+ }
+}
+
+/* vim: set ts=2 sw=2 et: */
diff --git a/keyboards/model01/model01.c b/keyboards/model01/model01.c
new file mode 100644
index 000000000..29615ca86
--- /dev/null
+++ b/keyboards/model01/model01.c
@@ -0,0 +1,38 @@
+/* Copyright 2018 James Laird-Wah
+ *
+ * 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 .
+ */
+#include
+#include
+#include
+#include "model01.h"
+
+void matrix_init_kb(void) {
+ /* the bootloader can leave LEDs on, so */
+ set_all_leds_to(0, 0, 0);
+ matrix_init_user();
+}
+
+void matrix_scan_kb(void) {
+ matrix_scan_user();
+}
+
+__attribute__ ((weak))
+void matrix_scan_user(void) {
+}
+
+__attribute__ ((weak))
+void matrix_init_user(void) {
+}
+
diff --git a/keyboards/model01/model01.h b/keyboards/model01/model01.h
new file mode 100644
index 000000000..a83e33cd8
--- /dev/null
+++ b/keyboards/model01/model01.h
@@ -0,0 +1,50 @@
+/* Copyright 2018 James Laird-Wah
+ *
+ * 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 .
+ */
+#pragma once
+
+#include
+
+#define LAYOUT( \
+ L07, L06, L05, L04, L03, L02, R05, R04, R03, R02, R01, R00, \
+ L17, L16, L15, L14, L13, L12, L01, R06, R15, R14, R13, R12, R11, R10, \
+ L27, L26, L25, L24, L23, L22, L11, R16, R25, R24, R23, R22, R21, R20, \
+ L37, L36, L35, L34, L33, L32, L21, R26, R35, R34, R33, R32, R31, R30, \
+ L00, R07, \
+ L10, R17, \
+ L20, R27, \
+ L30, R37, \
+ L31, R36 \
+ ) { \
+ {L00, L01, L02, L03, L04, L05, L06, L07}, \
+ {L10, L11, L12, L13, L14, L15, L16, L17}, \
+ {L20, L21, L22, L23, L24, L25, L26, L27}, \
+ {L30, L31, L32, L33, L34, L35, L36, L37}, \
+ {R00, R01, R02, R03, R04, R05, R06, R07}, \
+ {R10, R11, R12, R13, R14, R15, R16, R17}, \
+ {R20, R21, R22, R23, R24, R25, R26, R27}, \
+ {R30, R31, R32, R33, R34, R35, R36, R37} \
+ }
+
+#include "wire-protocol-constants.h"
+#define I2C_ADDR_LEFT (0x58 << 1)
+#define I2C_ADDR_RIGHT (I2C_ADDR_LEFT + 6)
+#define I2C_ADDR(hand) ((hand) ? I2C_ADDR_RIGHT : I2C_ADDR_LEFT)
+#define LEFT 0
+#define RIGHT 1
+
+#include "leds.h"
+
+/* vim: set ts=2 sw=2 et: */
diff --git a/keyboards/model01/readme.md b/keyboards/model01/readme.md
new file mode 100644
index 000000000..34bd291e2
--- /dev/null
+++ b/keyboards/model01/readme.md
@@ -0,0 +1,37 @@
+# Keyboardio Model 01
+
+A split keyboard.
+
+Keyboard Maintainer: QMK Community
+Hardware Supported: Keyboardio Model 01
+Hardware Availability: [Keyboardio](https://shop.keyboard.io)
+
+Make example for this keyboard (after setting up your build environment):
+
+ make model01: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).
+
+## Programming the Keyboard
+
+To program the keyboard, if you have avrdude installed:
+
+ make model01:default:avrdude
+
+When prompted to reset your keyboard, press the prog key at upper left. If the
+keyboard does not reset, you can hold the prog key while plugging it into your
+computer. The prog key will light up red in programming mode.
+
+## Features
+
+This implements the standard keymap, including mousekeys.
+
+It doesn't do cursor warping - QMK does not support absolute mouse positioning.
+
+LED support is limited. Gamma compensation and the high speed batch update
+functions supported by the hardware are not implemented. The high current power
+switch is also not implemented, so if you try and turn all the LEDs on at full
+brightness, something may conk out.
+
+Hotplugging the two halves works but is not extensively tested.
diff --git a/keyboards/model01/rules.mk b/keyboards/model01/rules.mk
new file mode 100644
index 000000000..cab7065ff
--- /dev/null
+++ b/keyboards/model01/rules.mk
@@ -0,0 +1,62 @@
+SRC += i2c_master.c \
+ leds.c \
+ matrix.c
+
+# MCU name
+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)
+
+# Interrupt driven control endpoint task(+60)
+OPT_DEFS += -DINTERRUPT_CONTROL_ENDPOINT
+
+BOOTLOADER = caterina
+
+# Build Options
+# change yes to no to disable
+#
+BOOTMAGIC_ENABLE = no # Virtual DIP switch configuration(+1000)
+MOUSEKEY_ENABLE = no # Mouse keys(+4700)
+EXTRAKEY_ENABLE = yes # Audio control and System control(+450)
+CONSOLE_ENABLE = yes # Console for debug(+400)
+COMMAND_ENABLE = no # 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
+MIDI_ENABLE = no # MIDI support (+2400 to 4200, depending on config)
+UNICODE_ENABLE = no # Unicode
+
+CUSTOM_MATRIX = yes
+CIE1931_CURVE = yes
diff --git a/keyboards/model01/wire-protocol-constants.h b/keyboards/model01/wire-protocol-constants.h
new file mode 100644
index 000000000..90a528582
--- /dev/null
+++ b/keyboards/model01/wire-protocol-constants.h
@@ -0,0 +1,53 @@
+/*
+ * This file is taken from the KeyboardioScanner module:
+ * https://github.com/keyboardio/KeyboardioScanner/blob/master/wire-protocol-constants.h
+ *
+ * Copyright (C) 2015-2018 Keyboard.io, Inc
+ *
+ * Permission is hereby granted, free of charge, to any person obtaining a copy
+ * of this software and associated documentation files (the "Software"), to deal
+ * in the Software without restriction, including without limitation the rights
+ * to use, copy, modify, merge, publish, distribute, sublicense, and/or sell
+ * copies of the Software, and to permit persons to whom the Software is
+ * furnished to do so, subject to the following conditions:
+ *
+ * The above copyright notice and this permission notice shall be included in all
+ * copies or substantial portions of the Software.
+ *
+ * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
+ * IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
+ * FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE
+ * AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
+ * LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
+ * OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE
+ * SOFTWARE.
+ */
+#pragma once
+
+#define TWI_CMD_NONE 0x00
+#define TWI_CMD_VERSION 0x01
+#define TWI_CMD_KEYSCAN_INTERVAL 0x02
+#define TWI_CMD_LED_SET_ALL_TO 0x03
+#define TWI_CMD_LED_SET_ONE_TO 0x04
+#define TWI_CMD_COLS_USE_PULLUPS 0x05
+#define TWI_CMD_LED_SPI_FREQUENCY 0x06
+
+#define LED_SPI_FREQUENCY_4MHZ 0x07
+#define LED_SPI_FREQUENCY_2MHZ 0x06
+#define LED_SPI_FREQUENCY_1MHZ 0x05
+#define LED_SPI_FREQUENCY_512KHZ 0x04
+#define LED_SPI_FREQUENCY_256KHZ 0x03
+#define LED_SPI_FREQUENCY_128KHZ 0x02
+#define LED_SPI_FREQUENCY_64KHZ 0x01
+#define LED_SPI_OFF 0x00
+
+
+// 512KHZ seems to be the sweet spot in early testing
+// so make it the default
+#define LED_SPI_FREQUENCY_DEFAULT LED_SPI_FREQUENCY_512KHZ
+
+
+#define TWI_CMD_LED_BASE 0x80
+
+#define TWI_REPLY_NONE 0x00
+#define TWI_REPLY_KEYDATA 0x01