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authormtdjr <mtdjr@users.noreply.github.com>2018-05-31 11:30:05 -0400
committerDrashna Jaelre <drashna@live.com>2018-05-31 08:30:05 -0700
commitee9a7aba396160929604aca54a23ad5534d59940 (patch)
treef4fbbde03ed548a68fd56bec5c6baf8cf217f180 /keyboards/handwired
parent21ad968ac14b177a7c97d34106c4d6201912627f (diff)
add not-so-minidox handwire keyboard (#3061)
* add not-so-minidox handwire keyboard * corrected keymap * multiple adjustments to not_so_minidox keyboard * remove I2C master left define * update default layer set function * move solenoid code into userspace * minor adjustments to config.h * update keymaps to utilize userspace * move features and config to userspace, correct build issue * correct solenoid pin * adjust defaults for solenoid pin and enable * default solenoid to on for not_so_minidox * disable RGBLIGHT_SLEEP for xd75 * tweaking solenoid enable/disable in userspace and keymaps
Diffstat (limited to 'keyboards/handwired')
-rw-r--r--keyboards/handwired/not_so_minidox/config.h84
-rw-r--r--keyboards/handwired/not_so_minidox/i2c.c162
-rw-r--r--keyboards/handwired/not_so_minidox/i2c.h49
-rw-r--r--keyboards/handwired/not_so_minidox/keymaps/default/keymap.c121
-rw-r--r--keyboards/handwired/not_so_minidox/keymaps/mtdjr/config.h11
-rw-r--r--keyboards/handwired/not_so_minidox/keymaps/mtdjr/keymap.c56
-rw-r--r--keyboards/handwired/not_so_minidox/keymaps/mtdjr/rules.mk1
-rw-r--r--keyboards/handwired/not_so_minidox/matrix.c307
-rw-r--r--keyboards/handwired/not_so_minidox/not_so_minidox.c1
-rw-r--r--keyboards/handwired/not_so_minidox/not_so_minidox.h42
-rw-r--r--keyboards/handwired/not_so_minidox/readme.md71
-rw-r--r--keyboards/handwired/not_so_minidox/rules.mk71
-rw-r--r--keyboards/handwired/not_so_minidox/serial.c228
-rw-r--r--keyboards/handwired/not_so_minidox/serial.h26
-rw-r--r--keyboards/handwired/not_so_minidox/split_util.c84
-rw-r--r--keyboards/handwired/not_so_minidox/split_util.h20
16 files changed, 1334 insertions, 0 deletions
diff --git a/keyboards/handwired/not_so_minidox/config.h b/keyboards/handwired/not_so_minidox/config.h
new file mode 100644
index 0000000000..3c0af7bf76
--- /dev/null
+++ b/keyboards/handwired/not_so_minidox/config.h
@@ -0,0 +1,84 @@
+/*
+Copyright 2012 Jun Wako <wakojun@gmail.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"
+
+/* USB Device descriptor parameter */
+#define VENDOR_ID 0xFEED
+#define PRODUCT_ID 0x3060
+#define DEVICE_VER 0x0001
+#define MANUFACTURER mtdjr
+#define PRODUCT Not So MiniDox
+#define DESCRIPTION A larger version of the MiniDox
+
+/* key matrix size */
+// Rows are doubled-up
+#define MATRIX_ROWS 8
+#define MATRIX_COLS 6
+
+/* COL2ROW or ROW2COL */
+#define DIODE_DIRECTION COL2ROW
+
+// wiring of each half
+#define MATRIX_ROW_PINS { D7, E6, B4, B5 }
+#define MATRIX_COL_PINS { B6, B2, B3, B1, F7, D4 }
+
+#define USE_SERIAL
+
+//#define EE_HANDS
+
+#define MASTER_LEFT
+//#define MASTER_RIGHT
+
+/* 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)) \
+)
+
+/* 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/handwired/not_so_minidox/i2c.c b/keyboards/handwired/not_so_minidox/i2c.c
new file mode 100644
index 0000000000..084c890c40
--- /dev/null
+++ b/keyboards/handwired/not_so_minidox/i2c.c
@@ -0,0 +1,162 @@
+#include <util/twi.h>
+#include <avr/io.h>
+#include <stdlib.h>
+#include <avr/interrupt.h>
+#include <util/twi.h>
+#include <stdbool.h>
+#include "i2c.h"
+
+#ifdef USE_I2C
+
+// Limits the amount of we wait for any one i2c transaction.
+// Since were running SCL line 100kHz (=> 10μs/bit), and each transactions is
+// 9 bits, a single transaction will take around 90μs to complete.
+//
+// (F_CPU/SCL_CLOCK) => # of μC cycles to transfer a bit
+// poll loop takes at least 8 clock cycles to execute
+#define I2C_LOOP_TIMEOUT (9+1)*(F_CPU/SCL_CLOCK)/8
+
+#define BUFFER_POS_INC() (slave_buffer_pos = (slave_buffer_pos+1)%SLAVE_BUFFER_SIZE)
+
+volatile uint8_t i2c_slave_buffer[SLAVE_BUFFER_SIZE];
+
+static volatile uint8_t slave_buffer_pos;
+static volatile bool slave_has_register_set = false;
+
+// Wait for an i2c operation to finish
+inline static
+void i2c_delay(void) {
+ uint16_t lim = 0;
+ while(!(TWCR & (1<<TWINT)) && lim < I2C_LOOP_TIMEOUT)
+ lim++;
+
+ // easier way, but will wait slightly longer
+ // _delay_us(100);
+}
+
+// Setup twi to run at 100kHz
+void i2c_master_init(void) {
+ // no prescaler
+ TWSR = 0;
+ // Set TWI clock frequency to SCL_CLOCK. Need TWBR>10.
+ // Check datasheets for more info.
+ TWBR = ((F_CPU/SCL_CLOCK)-16)/2;
+}
+
+// Start a transaction with the given i2c slave address. The direction of the
+// transfer is set with I2C_READ and I2C_WRITE.
+// returns: 0 => success
+// 1 => error
+uint8_t i2c_master_start(uint8_t address) {
+ TWCR = (1<<TWINT) | (1<<TWEN) | (1<<TWSTA);
+
+ i2c_delay();
+
+ // check that we started successfully
+ if ( (TW_STATUS != TW_START) && (TW_STATUS != TW_REP_START))
+ return 1;
+
+ TWDR = address;
+ TWCR = (1<<TWINT) | (1<<TWEN);
+
+ i2c_delay();
+
+ if ( (TW_STATUS != TW_MT_SLA_ACK) && (TW_STATUS != TW_MR_SLA_ACK) )
+ return 1; // slave did not acknowledge
+ else
+ return 0; // success
+}
+
+
+// Finish the i2c transaction.
+void i2c_master_stop(void) {
+ TWCR = (1<<TWINT) | (1<<TWEN) | (1<<TWSTO);
+
+ uint16_t lim = 0;
+ while(!(TWCR & (1<<TWSTO)) && lim < I2C_LOOP_TIMEOUT)
+ lim++;
+}
+
+// Write one byte to the i2c slave.
+// returns 0 => slave ACK
+// 1 => slave NACK
+uint8_t i2c_master_write(uint8_t data) {
+ TWDR = data;
+ TWCR = (1<<TWINT) | (1<<TWEN);
+
+ i2c_delay();
+
+ // check if the slave acknowledged us
+ return (TW_STATUS == TW_MT_DATA_ACK) ? 0 : 1;
+}
+
+// Read one byte from the i2c slave. If ack=1 the slave is acknowledged,
+// if ack=0 the acknowledge bit is not set.
+// returns: byte read from i2c device
+uint8_t i2c_master_read(int ack) {
+ TWCR = (1<<TWINT) | (1<<TWEN) | (ack<<TWEA);
+
+ i2c_delay();
+ return TWDR;
+}
+
+void i2c_reset_state(void) {
+ TWCR = 0;
+}
+
+void i2c_slave_init(uint8_t address) {
+ TWAR = address << 0; // slave i2c address
+ // TWEN - twi enable
+ // TWEA - enable address acknowledgement
+ // TWINT - twi interrupt flag
+ // TWIE - enable the twi interrupt
+ TWCR = (1<<TWIE) | (1<<TWEA) | (1<<TWINT) | (1<<TWEN);
+}
+
+ISR(TWI_vect);
+
+ISR(TWI_vect) {
+ uint8_t ack = 1;
+ switch(TW_STATUS) {
+ case TW_SR_SLA_ACK:
+ // this device has been addressed as a slave receiver
+ slave_has_register_set = false;
+ break;
+
+ case TW_SR_DATA_ACK:
+ // this device has received data as a slave receiver
+ // The first byte that we receive in this transaction sets the location
+ // of the read/write location of the slaves memory that it exposes over
+ // i2c. After that, bytes will be written at slave_buffer_pos, incrementing
+ // slave_buffer_pos after each write.
+ if(!slave_has_register_set) {
+ slave_buffer_pos = TWDR;
+ // don't acknowledge the master if this memory loctaion is out of bounds
+ if ( slave_buffer_pos >= SLAVE_BUFFER_SIZE ) {
+ ack = 0;
+ slave_buffer_pos = 0;
+ }
+ slave_has_register_set = true;
+ } else {
+ i2c_slave_buffer[slave_buffer_pos] = TWDR;
+ BUFFER_POS_INC();
+ }
+ break;
+
+ case TW_ST_SLA_ACK:
+ case TW_ST_DATA_ACK:
+ // master has addressed this device as a slave transmitter and is
+ // requesting data.
+ TWDR = i2c_slave_buffer[slave_buffer_pos];
+ BUFFER_POS_INC();
+ break;
+
+ case TW_BUS_ERROR: // something went wrong, reset twi state
+ TWCR = 0;
+ default:
+ break;
+ }
+ // Reset everything, so we are ready for the next TWI interrupt
+ TWCR |= (1<<TWIE) | (1<<TWINT) | (ack<<TWEA) | (1<<TWEN);
+}
+#endif
diff --git a/keyboards/handwired/not_so_minidox/i2c.h b/keyboards/handwired/not_so_minidox/i2c.h
new file mode 100644
index 0000000000..c15b6bc506
--- /dev/null
+++ b/keyboards/handwired/not_so_minidox/i2c.h
@@ -0,0 +1,49 @@
+#ifndef I2C_H
+#define I2C_H
+
+#include <stdint.h>
+
+#ifndef F_CPU
+#define F_CPU 16000000UL
+#endif
+
+#define I2C_READ 1
+#define I2C_WRITE 0
+
+#define I2C_ACK 1
+#define I2C_NACK 0
+
+#define SLAVE_BUFFER_SIZE 0x10
+
+// i2c SCL clock frequency
+#define SCL_CLOCK 400000L
+
+extern volatile uint8_t i2c_slave_buffer[SLAVE_BUFFER_SIZE];
+
+void i2c_master_init(void);
+uint8_t i2c_master_start(uint8_t address);
+void i2c_master_stop(void);
+uint8_t i2c_master_write(uint8_t data);
+uint8_t i2c_master_read(int);
+void i2c_reset_state(void);
+void i2c_slave_init(uint8_t address);
+
+
+static inline unsigned char i2c_start_read(unsigned char addr) {
+ return i2c_master_start((addr << 1) | I2C_READ);
+}
+
+static inline unsigned char i2c_start_write(unsigned char addr) {
+ return i2c_master_start((addr << 1) | I2C_WRITE);
+}
+
+// from SSD1306 scrips
+extern unsigned char i2c_rep_start(unsigned char addr);
+extern void i2c_start_wait(unsigned char addr);
+extern unsigned char i2c_readAck(void);
+extern unsigned char i2c_readNak(void);
+extern unsigned char i2c_read(unsigned char ack);
+
+#define i2c_read(ack) (ack) ? i2c_readAck() : i2c_readNak();
+
+#endif
diff --git a/keyboards/handwired/not_so_minidox/keymaps/default/keymap.c b/keyboards/handwired/not_so_minidox/keymaps/default/keymap.c
new file mode 100644
index 0000000000..8ea36198a1
--- /dev/null
+++ b/keyboards/handwired/not_so_minidox/keymaps/default/keymap.c
@@ -0,0 +1,121 @@
+#include QMK_KEYBOARD_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 _LOWER 1
+#define _RAISE 2
+#define _ADJUST 16
+
+enum custom_keycodes {
+ QWERTY = SAFE_RANGE,
+ LOWER,
+ RAISE,
+ ADJUST,
+};
+
+// Fillers to make layering more clear
+#define _______ KC_TRNS
+#define XXXXXXX KC_NO
+
+#define KC_LOWR LOWER
+#define KC_RASE RAISE
+#define KC_RST RESET
+#define KC_CAD LCTL(LALT(KC_DEL))
+
+const uint16_t PROGMEM keymaps[][MATRIX_ROWS][MATRIX_COLS] = {
+
+ [_QWERTY] = LAYOUT(
+// ,-------+-------+-------+-------+-------+-------. ,-------+-------+-------+-------+-------+-------.
+ 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_LCTL, 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_LGUI,KC_LOWR, KC_SPC, KC_SPC,KC_RASE,KC_RALT
+ // `-------+-------+-------` `-------+-------+-------`
+ ),
+
+ [_LOWER] = LAYOUT(
+// ,-------+-------+-------+-------+-------+-------. ,-------+-------+-------+-------+-------+-------.
+ KC_ESC, KC_1, KC_2, KC_3, KC_4, KC_5, KC_6, KC_7, KC_8, KC_9, KC_0, KC_DEL,
+// |-------+-------+-------+-------+-------+-------. ,-------+-------+-------+-------+-------+-------|
+ _______,_______,_______,_______,_______,_______, _______,_______,_______,KC_LCBR,KC_RCBR,KC_BSLS,
+// |-------+-------+-------+-------+-------+-------. ,-------+-------+-------+-------+-------+-------|
+ _______,_______,_______,_______,_______,_______, _______,_______,_______,_______,_______,_______,
+// '-------+-------+-------+-------+-------+-------. ,-------+-------+-------+-------+-------+-------'
+ _______,_______,_______, _______,_______,_______
+ // `-------+-------+-------` `-------+-------+-------`
+ ),
+
+ [_RAISE] = LAYOUT(
+ // ,-------+-------+-------+-------+-------+-------. ,-------+-------+-------+-------+-------+-------.
+ KC_GRV,KC_EXLM, KC_AT,KC_HASH, KC_DLR,KC_PERC, KC_CIRC,KC_AMPR,KC_ASTR,KC_LPRN,KC_RPRN, KC_DEL,
+ // |-------+-------+-------+-------+-------+-------. ,-------+-------+-------+-------+-------+-------|
+ _______,_______,_______,_______,KC_MINS, KC_EQL, _______, KC_UP,_______,KC_LBRC,KC_RBRC,KC_PIPE,
+ // |-------+-------+-------+-------+-------+-------. ,-------+-------+-------+-------+-------+-------|
+ _______,_______,_______,_______,_______,_______, KC_LEFT,KC_DOWN,KC_RGHT,_______,_______,_______,
+ // '-------+-------+-------+-------+-------+-------. ,-------+-------+-------+-------+-------+-------'
+ _______,_______,_______, _______,_______,_______
+ // `-------+-------+-------` `-------+-------+-------`
+ ),
+ [_ADJUST] = LAYOUT(
+// ,-------+-------+-------+-------+-------+-------. ,-------+-------+-------+-------+-------+-------.
+ _______,_______,_______,_______, KC_RST,_______, _______,_______,_______,_______,_______, KC_CAD,
+// |-------+-------+-------+-------+-------+-------. ,-------+-------+-------+-------+-------+-------|
+ _______,_______,_______,_______,_______,_______, _______,_______,_______,_______,_______,_______,
+// |-------+-------+-------+-------+-------+-------. ,-------+-------+-------+-------+-------+-------|
+ _______,_______,_______,_______,_______,_______, _______,_______,_______,_______,_______,_______,
+// '-------+-------+-------+-------+-------+-------. ,-------+-------+-------+-------+-------+-------'
+ _______,_______,_______, _______,_______,_______
+ // `-------+-------+-------` `-------+-------+-------`
+ )
+};
+
+
+bool process_record_user(uint16_t keycode, keyrecord_t *record) {
+ switch (keycode) {
+ case QWERTY:
+ if (record->event.pressed) {
+ set_single_persistent_default_layer(_QWERTY);
+ }
+ return false;
+ break;
+ case LOWER:
+ if (record->event.pressed) {
+ layer_on(_LOWER);
+ update_tri_layer(_LOWER, _RAISE, _ADJUST);
+ } else {
+ layer_off(_LOWER);
+ update_tri_layer(_LOWER, _RAISE, _ADJUST);
+ }
+ return false;
+ break;
+ case RAISE:
+ if (record->event.pressed) {
+ layer_on(_RAISE);
+ update_tri_layer(_LOWER, _RAISE, _ADJUST);
+ } else {
+ layer_off(_RAISE);
+ update_tri_layer(_LOWER, _RAISE, _ADJUST);
+ }
+ return false;
+ break;
+ case ADJUST:
+ if (record->event.pressed) {
+ layer_on(_ADJUST);
+ update_tri_layer(_LOWER, _RAISE, _ADJUST);
+ } else {
+ layer_off(_ADJUST);
+ update_tri_layer(_LOWER, _RAISE, _ADJUST);
+ }
+ return false;
+ break;
+ }
+ return true;
+}
diff --git a/keyboards/handwired/not_so_minidox/keymaps/mtdjr/config.h b/keyboards/handwired/not_so_minidox/keymaps/mtdjr/config.h
new file mode 100644
index 0000000000..fa6151e108
--- /dev/null
+++ b/keyboards/handwired/not_so_minidox/keymaps/mtdjr/config.h
@@ -0,0 +1,11 @@
+#ifndef CONFIG_USER_H
+#define CONFIG_USER_H
+
+#include QMK_KEYBOARD_CONFIG_H
+
+#define SOLENOID_ENABLE
+#define SOLENOID_PIN F6
+#undef SOLENOID_ACTIVE
+#define SOLENOID_ACTIVE true
+
+#endif
diff --git a/keyboards/handwired/not_so_minidox/keymaps/mtdjr/keymap.c b/keyboards/handwired/not_so_minidox/keymaps/mtdjr/keymap.c
new file mode 100644
index 0000000000..01c64d8701
--- /dev/null
+++ b/keyboards/handwired/not_so_minidox/keymaps/mtdjr/keymap.c
@@ -0,0 +1,56 @@
+#include QMK_KEYBOARD_H
+#include "mtdjr.h"
+
+extern keymap_config_t keymap_config;
+
+#define KC_LOCK TD(TD_ALTLOCK)
+
+const uint16_t PROGMEM keymaps[][MATRIX_ROWS][MATRIX_COLS] = {
+
+ [_QWERTY] = LAYOUT_kc(
+ // ,----+-----+-----+-----+-----+-----, ,----+-----+-----+-----+-----+-----,
+ TAB, Q, W, E, R, T, Y, U, I, O, P, BSPC,
+ // |----+-----+-----+-----+-----+-----| |----+-----+-----+-----+-----+-----|
+ LCTL, A, S, D, F, G, H, J, K, L, SCLN, QUOT,
+ // |----+-----+-----+-----+-----+-----| |----+-----+-----+-----+-----+-----|
+ LSFT, Z, X, C, V, B, N, M, COMM, DOT, SLSH, ENT,
+ // |----+-----+-----+-----+-----+-----|-, ,-|----+-----+-----+-----+-----+-----|
+ LGUI, LOWR, SPC, SPC, RASE, LOCK
+ // `----+-----+-----` `----+-----+-----`
+ ),
+
+ [_LOWER] = LAYOUT_kc(
+ // ,----+-----+-----+-----+-----+-----, ,----+-----+-----+-----+-----+-----,
+ ESC, 1, 2, 3, 4, 5, 6, 7, 8, 9, 0, DEL,
+ // |----+-----+-----+-----+-----+-----| |----+-----+-----+-----+-----+-----|
+ , , , , , , , , , LCBR, RCBR, BSLS,
+ // |----+-----+-----+-----+-----+-----| |----+-----+-----+-----+-----+-----|
+ , , , XCPY, XINS, , , , , , , ,
+ // |----+-----+-----+-----+-----+-----|-, ,-|----+-----+-----+-----+-----+-----|
+ , , , , ,
+ // `----+-----+-----` `----+-----+-----`
+ ),
+
+ [_RAISE] = LAYOUT_kc(
+ // ,----+-----+-----+-----+-----+-----, ,----+-----+-----+-----+-----+-----,
+ GRV, EXLM, AT, HASH, DLR, PERC, CIRC, AMPR, ASTR, LPRN, RPRN, DEL,
+ // |----+-----+-----+-----+-----+-----| |----+-----+-----+-----+-----+-----|
+ , , , , MINS, EQL, , , UP, LBRC, RBRC, PIPE,
+ // |----+-----+-----+-----+-----+-----| |----+-----+-----+-----+-----+-----|
+ , , , , , , , LEFT, DOWN, RGHT, , ,
+ // |----+-----+-----+-----+-----+-----|-, ,-|----+-----+-----+-----+-----+-----|
+ , , , , ,
+ // `----+-----+-----` `----+-----+-----`
+ ),
+ [_ADJUST] = LAYOUT_kc(
+ // ,----+-----+-----+-----+-----+-----, ,----+-----+-----+-----+-----+-----,
+ STOG, xxxx, xxxx, xxxx, RST, xxxx, ROOT, PPLY, PSEF, xxxx, xxxx, CAD,
+ // |----+-----+-----+-----+-----+-----| |----+-----+-----+-----+-----+-----|
+ SDM, SDP, SBOF, SBON, xxxx, xxxx, xxxx, xxxx, xxxx, xxxx, xxxx, xxxx,
+ // |----+-----+-----+-----+-----+-----| |----+-----+-----+-----+-----+-----|
+ xxxx, xxxx, xxxx, xxxx, xxxx, xxxx, xxxx, xxxx, xxxx, xxxx, xxxx, xxxx,
+ // |----+-----+-----+-----+-----+-----|-, ,-|----+-----+-----+-----+-----+-----|
+ xxxx, , xxxx, xxxx, , xxxx
+ // `----+-----+-----` `----+-----+-----`
+ )
+};
diff --git a/keyboards/handwired/not_so_minidox/keymaps/mtdjr/rules.mk b/keyboards/handwired/not_so_minidox/keymaps/mtdjr/rules.mk
new file mode 100644
index 0000000000..e5ddcae8d9
--- /dev/null
+++ b/keyboards/handwired/not_so_minidox/keymaps/mtdjr/rules.mk
@@ -0,0 +1 @@
+TAP_DANCE_ENABLE = yes
diff --git a/keyboards/handwired/not_so_minidox/matrix.c b/keyboards/handwired/not_so_minidox/matrix.c
new file mode 100644
index 0000000000..27a38dca02
--- /dev/null
+++ b/keyboards/handwired/not_so_minidox/matrix.c
@@ -0,0 +1,307 @@
+/*
+Copyright 2012 Jun Wako <wakojun@gmail.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/>.
+*/
+
+/*
+ * scan matrix
+ */
+#include <stdint.h>
+#include <stdbool.h>
+#include <avr/io.h>
+#include <avr/wdt.h>
+#include <avr/interrupt.h>
+#include <util/delay.h>
+#include "print.h"
+#include "debug.h"
+#include "util.h"
+#include "matrix.h"
+#include "split_util.h"
+#include "pro_micro.h"
+#include "config.h"
+
+#ifdef USE_I2C
+# include "i2c.h"
+#else // USE_SERIAL
+# include "serial.h"
+#endif
+
+#ifndef DEBOUNCE
+# define DEBOUNCE 5
+#endif
+
+#define ERROR_DISCONNECT_COUNT 5
+
+static uint8_t debouncing = DEBOUNCE;
+static const int 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];
+
+static matrix_row_t read_cols(void);
+static void init_cols(void);
+static void unselect_rows(void);
+static void select_row(uint8_t row);
+
+
+__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;
+ }
+
+ matrix_init_quantum();
+}
+
+uint8_t _matrix_scan(void)
+{
+ // Right hand is stored after the left in the matirx so, we need to offset it
+ int offset = isLeftHand ? 0 : (ROWS_PER_HAND);
+
+ for (uint8_t i = 0; i < ROWS_PER_HAND; i++) {
+ select_row(i);
+ _delay_us(30); // without this wait read unstable value.
+ matrix_row_t cols = read_cols();
+ if (matrix_debouncing[i+offset] != cols) {
+ matrix_debouncing[i+offset] = cols;
+ debouncing = DEBOUNCE;
+ }
+ unselect_rows();
+ }
+
+ if (debouncing) {
+ if (--debouncing) {
+ _delay_ms(1);
+ } else {
+ for (uint8_t i = 0; i < ROWS_PER_HAND; i++) {
+ matrix[i+offset] = matrix_debouncing[i+offset];
+ }
+ }
+ }
+
+ 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];
+ }
+ return 0;
+}
+#endif
+
+uint8_t matrix_scan(void)
+{
+ int 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;
+ }
+ matrix_scan_quantum();
+ return ret;
+}
+
+void matrix_slave_scan(void) {
+ _matrix_scan();
+
+ int offset = (isLeftHand) ? 0 : (MATRIX_ROWS / 2);
+
+#ifdef USE_I2C
+ for (int i = 0; i < ROWS_PER_HAND; ++i) {
+ /* i2c_slave_buffer[i] = matrix[offset+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];
+ }
+#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;
+}
+
+static void init_cols(void)
+{
+ for(int x = 0; x < MATRIX_COLS; x++) {
+ _SFR_IO8((col_pins[x] >> 4) + 1) &= ~_BV(col_pins[x] & 0xF);
+ _SFR_IO8((col_pins[x] >> 4) + 2) |= _BV(col_pins[x] & 0xF);
+ }
+}
+
+static matrix_row_t read_cols(void)
+{
+ matrix_row_t result = 0;
+ for(int x = 0; x < MATRIX_COLS; x++) {
+ result |= (_SFR_IO8(col_pins[x] >> 4) & _BV(col_pins[x] & 0xF)) ? 0 : (1 << x);
+ }
+ return result;
+}
+
+static void unselect_rows(void)
+{
+ for(int x = 0; x < ROWS_PER_HAND; x++) {
+ _SFR_IO8((row_pins[x] >> 4) + 1) &= ~_BV(row_pins[x] & 0xF);
+ _SFR_IO8((row_pins[x] >> 4) + 2) |= _BV(row_pins[x] & 0xF);
+ }
+}
+
+static void select_row(uint8_t row)
+{
+ _SFR_IO8((row_pins[row] >> 4) + 1) |= _BV(row_pins[row] & 0xF);
+ _SFR_IO8((row_pins[row] >> 4) + 2) &= ~_BV(row_pins[row] & 0xF);
+}
diff --git a/keyboards/handwired/not_so_minidox/not_so_minidox.c b/keyboards/handwired/not_so_minidox/not_so_minidox.c
new file mode 100644
index 0000000000..898c9eaca8
--- /dev/null
+++ b/keyboards/handwired/not_so_minidox/not_so_minidox.c
@@ -0,0 +1 @@
+#include "not_so_minidox.h" \ No newline at end of file
diff --git a/keyboards/handwired/not_so_minidox/not_so_minidox.h b/keyboards/handwired/not_so_minidox/not_so_minidox.h
new file mode 100644
index 0000000000..05e7bc4914
--- /dev/null
+++ b/keyboards/handwired/not_so_minidox/not_so_minidox.h
@@ -0,0 +1,42 @@
+#ifndef NOSOTMINIDOX_H
+#define NOSOTMINIDOX_H
+
+
+#include "quantum.h"
+
+#define LAYOUT( \
+ L00, L01, L02, L03, L04, L05, R05, R04, R03, R02, R01, R00, \
+ L10, L11, L12, L13, L14, L15, R15, R14, R13, R12, R11, R10, \
+ L20, L21, L22, L23, L24, L25, R25, R24, R23, R22, R21, R20, \
+ LT1, LT2, LT3, RT3, RT2, RT1 \
+ ) \
+ { \
+ { L00, L01, L02, L03, L04, L05 }, \
+ { L10, L11, L12, L13, L14, L15 }, \
+ { L20, L21, L22, L23, L24, L25 }, \
+ { KC_NO, KC_NO, KC_NO, LT1, LT2, LT3 }, \
+ { R00, R01, R02, R03, R04, R05 }, \
+ { R10, R11, R12, R13, R14, R15 }, \
+ { R20, R21, R22, R23, R24, R25 }, \
+ { KC_NO, KC_NO, KC_NO, RT1, RT2, RT3 }, \
+ }
+
+// Used to create a keymap using only KC_ prefixed keys
+#define LAYOUT_kc( \
+ L00, L01, L02, L03, L04, L05, R05, R04, R03, R02, R01, R00, \
+ L10, L11, L12, L13, L14, L15, R15, R14, R13, R12, R11, R10, \
+ L20, L21, L22, L23, L24, L25, R25, R24, R23, R22, R21, R20, \
+ LT1, LT2, LT3, RT3, RT2, RT1 \
+ ) \
+ { \
+ { KC_##L00, KC_##L01, KC_##L02, KC_##L03, KC_##L04, KC_##L05 }, \
+ { KC_##L10, KC_##L11, KC_##L12, KC_##L13, KC_##L14, KC_##L15 }, \
+ { KC_##L20, KC_##L21, KC_##L22, KC_##L23, KC_##L24, KC_##L25 }, \
+ { KC_NO, KC_NO, KC_NO, KC_##LT1, KC_##LT2, KC_##LT3 }, \
+ { KC_##R00, KC_##R01, KC_##R02, KC_##R03, KC_##R04, KC_##R05 }, \
+ { KC_##R10, KC_##R11, KC_##R12, KC_##R13, KC_##R14, KC_##R15 }, \
+ { KC_##R20, KC_##R21, KC_##R22, KC_##R23, KC_##R24, KC_##R25 }, \
+ { KC_NO, KC_NO, KC_NO, KC_##RT1, KC_##RT2, KC_##RT3 }, \
+ }
+
+#endif
diff --git a/keyboards/handwired/not_so_minidox/readme.md b/keyboards/handwired/not_so_minidox/readme.md
new file mode 100644
index 0000000000..fbfa7b7be0
--- /dev/null
+++ b/keyboards/handwired/not_so_minidox/readme.md
@@ -0,0 +1,71 @@
+not_so_minidox
+=====
+
+![not_so_minidox]()
+
+A slightly larger version of the MiniDox
+
+Keyboard Maintainer: mtdjr
+Hardware Supported: None yet/ProMicro
+
+Make example for this keyboard (after setting up your build environment):
+
+ make not_so_minidox/rev1:default
+
+See [build environment setup](https://docs.qmk.fm/build_environment_setup.html) then the [make instructions](https://docs.qmk.fm/make_instructions.html) for more information.
+
+Flashing
+-------
+Note: Most of this is copied from the Let's Split readme, because it is awesome
+
+From the root directory run `make PROJECT:KEYMAP:avrdude` for automatic serial port resolution and flashing.
+Example: `make not_so_minidox/rev1:default:avrdude`
+
+Choosing which board to plug the USB cable into (choosing Master)
+--------
+Because the two boards are identical, the firmware has logic to differentiate the left and right board.
+
+It uses two strategies to figure things out: look at the EEPROM (memory on the chip) or looks if the current board has the usb cable.
+
+The EEPROM approach requires additional setup (flashing the eeeprom) but allows you to swap the usb cable to either side.
+
+The USB cable approach is easier to setup and if you just want the usb cable on the left board, you do not need to do anything extra.
+
+### Setting the left hand as master
+If you always plug the usb cable into the left board, nothing extra is needed as this is the default. Comment out `EE_HANDS` and comment out `I2C_MASTER_RIGHT` or `MASTER_RIGHT` if for some reason it was set.
+
+### Setting the right hand as master
+If you always plug the usb cable into the right board, add an extra flag to your `config.h`
+```
+ #define MASTER_RIGHT
+```
+
+### Setting EE_hands to use either hands as master
+If you define `EE_HANDS` in your `config.h`, you will need to set the
+EEPROM for the left and right halves.
+
+The EEPROM is used to store whether the
+half is left handed or right handed. This makes it so that the same firmware
+file will run on both hands instead of having to flash left and right handed
+versions of the firmware to each half. To flash the EEPROM file for the left
+half run:
+```
+avrdude -p atmega32u4 -P $(COM_PORT) -c avr109 -U eeprom:w:eeprom-lefthand.eep
+// or the equivalent in dfu-programmer
+
+```
+and similarly for right half
+```
+avrdude -p atmega32u4 -P $(COM_PORT) -c avr109 -U eeprom:w:eeprom-righhand.eep
+// or the equivalent in dfu-programmer
+```
+
+NOTE: replace `$(COM_PORT)` with the port of your device (e.g. `/dev/ttyACM0`)
+
+After you have flashed the EEPROM, you then need to set `EE_HANDS` in your config.h, rebuild the hex files and reflash.
+
+Note that you need to program both halves, but you have the option of using
+different keymaps for each half. You could program the left half with a QWERTY
+layout and the right half with a Colemak layout using bootmagic's default layout option.
+Then if you connect the left half to a computer by USB the keyboard will use QWERTY and Colemak when the
+right half is connected.
diff --git a/keyboards/handwired/not_so_minidox/rules.mk b/keyboards/handwired/not_so_minidox/rules.mk
new file mode 100644
index 0000000000..fe4cc014e7
--- /dev/null
+++ b/keyboards/handwired/not_so_minidox/rules.mk
@@ -0,0 +1,71 @@
+SRC += matrix.c \
+ i2c.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 ?= no # 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 ?= no # 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 ?= no # Enable WS2812 RGB underlight. Do not enable this with audio at the same time.
+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
diff --git a/keyboards/handwired/not_so_minidox/serial.c b/keyboards/handwired/not_so_minidox/serial.c
new file mode 100644
index 0000000000..74bcbb6bf6
--- /dev/null
+++ b/keyboards/handwired/not_so_minidox/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/handwired/not_so_minidox/serial.h b/keyboards/handwired/not_so_minidox/serial.h
new file mode 100644
index 0000000000..15fe4db7b4
--- /dev/null
+++ b/keyboards/handwired/not_so_minidox/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/handwired/not_so_minidox/split_util.c b/keyboards/handwired/not_so_minidox/split_util.c
new file mode 100644
index 0000000000..39639c3b4b
--- /dev/null
+++ b/keyboards/handwired/not_so_minidox/split_util.c
@@ -0,0 +1,84 @@
+#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"
+
+#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) {
+#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/handwired/not_so_minidox/split_util.h b/keyboards/handwired/not_so_minidox/split_util.h
new file mode 100644
index 0000000000..595a0659e1
--- /dev/null
+++ b/keyboards/handwired/not_so_minidox/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