refactor SPLIT_KEYBOARD, OLED_DRIVER_ENABLE (#10405)

33 files changed, 236 insertions, 2539 deletions

diff --git a/keyboards/claw44/claw44.c b/keyboards/claw44/claw44.c
index f564fb623b..d87103065c 100644
--- a/keyboards/claw44/claw44.c
+++ b/keyboards/claw44/claw44.c
@@ -1,10 +1 @@
 #include "claw44.h"
-#include "ssd1306.h"
-
-bool process_record_kb(uint16_t keycode, keyrecord_t *record) {
-#ifdef SSD1306OLED
-  return process_record_gfx(keycode,record) && process_record_user(keycode, record);
-#else
-  return process_record_user(keycode, record);
-#endif
-}
diff --git a/keyboards/claw44/config.h b/keyboards/claw44/config.h
index fb1cdf3962..0bd74ff833 100644
--- a/keyboards/claw44/config.h
+++ b/keyboards/claw44/config.h
@@ -19,10 +19,6 @@ along with this program.  If not, see <http://www.gnu.org/licenses/>.
 #pragma once
 
 #include "config_common.h"
-#include <serial_config.h>
-
-#define USE_I2C
-#define USE_SERIAL
 
 #define NO_ACTION_MACRO
 #define NO_ACTION_FUNCTION
diff --git a/keyboards/claw44/i2c.c b/keyboards/claw44/i2c.c
deleted file mode 100644
index 4bee5c6398..0000000000
--- a/keyboards/claw44/i2c.c
+++ /dev/null
@@ -1,162 +0,0 @@
-#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 or 400kHz (see ./i2c.h SCL_CLOCK)
-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/claw44/i2c.h b/keyboards/claw44/i2c.h
deleted file mode 100644
index 710662c7ab..0000000000
--- a/keyboards/claw44/i2c.h
+++ /dev/null
@@ -1,46 +0,0 @@
-#pragma once
-
-#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 400kHz
-#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();
diff --git a/keyboards/claw44/keymaps/default/config.h b/keyboards/claw44/keymaps/default/config.h
index eff6ad3c7b..d2ea02545b 100644
--- a/keyboards/claw44/keymaps/default/config.h
+++ b/keyboards/claw44/keymaps/default/config.h
@@ -20,16 +20,4 @@ along with this program.  If not, see <http://www.gnu.org/licenses/>.
 
 #pragma once
 
-//#define USE_MATRIX_I2C
-
-/* Select hand configuration */
-
 #define MASTER_LEFT
-// #define MASTER_RIGHT
-// #define EE_HANDS
-
-#define SSD1306OLED
-
-#define USE_SERIAL_PD2
-
-#define TAPPING_TERM 200
diff --git a/keyboards/claw44/keymaps/default/keymap.c b/keyboards/claw44/keymaps/default/keymap.c
index 088087c773..65dbd67d98 100644
--- a/keyboards/claw44/keymaps/default/keymap.c
+++ b/keyboards/claw44/keymaps/default/keymap.c
@@ -1,168 +1,59 @@
 #include QMK_KEYBOARD_H
-#ifdef PROTOCOL_LUFA
-  #include "lufa.h"
-  #include "split_util.h"
-#endif
-#ifdef SSD1306OLED
-  #include "ssd1306.h"
-#endif
-
-
-extern uint8_t is_master;
 
 // 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.
 
-enum custom_keycodes {
-  QWERTY = SAFE_RANGE,
-  LOWER,
-  RAISE
-};
-
-enum macro_keycodes {
-  KC_SAMPLEMACRO,
+enum layer_number {
+    _QWERTY = 0,
+    _RAISE,
+    _LOWER,
 };
 
 #define KC_ KC_TRNS
 #define KC_RST RESET
-#define KC_L_SPC LT(_LOWER, KC_SPC) // lower
-#define KC_R_ENT LT(_RAISE, KC_ENT) // raise
-#define KC_G_JA LGUI_T(KC_LANG1) // cmd or win
-#define KC_G_EN LGUI_T(KC_LANG2) // cmd or win
-#define KC_C_BS LCTL_T(KC_BSPC) // ctrl
-#define KC_A_DEL ALT_T(KC_DEL) // alt
+#define KC_L_SPC LT(_LOWER, KC_SPC)  // lower
+#define KC_R_ENT LT(_RAISE, KC_ENT)  // raise
+#define KC_G_JA LGUI_T(KC_LANG1)     // cmd or win
+#define KC_G_EN LGUI_T(KC_LANG2)     // cmd or win
+#define KC_C_BS LCTL_T(KC_BSPC)      // ctrl
+#define KC_A_DEL ALT_T(KC_DEL)       // alt
 
 const uint16_t PROGMEM keymaps[][MATRIX_ROWS][MATRIX_COLS] = {
-
-  [_QWERTY] = LAYOUT( \
-  //,--------+--------+---------+--------+---------+--------.   ,--------+---------+--------+---------+--------+--------.
-     KC_ESC , KC_Q   , KC_W    , KC_E   , KC_R    , KC_T   ,     KC_Y   , KC_U    , KC_I   , KC_O    , KC_P   , KC_MINS,
-  //|--------+--------+---------+--------+---------+--------|   |--------+---------+--------+---------+--------+--------|
-     KC_TAB , 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_RSFT,
-  //`--------+--------+---------+--------+---------+--------/   \--------+---------+--------+---------+--------+--------'
-                       KC_A_DEL, KC_G_EN, KC_L_SPC, KC_C_BS,     KC_C_BS, KC_R_ENT, KC_G_JA, KC_A_DEL
-  //                 `----------+--------+---------+--------'   `--------+---------+--------+---------'
-  ),
-
-  //   \ ^ ! & |  @ = + * % -
-  // ( # $ " ' ~  ← ↓ ↑ → ` )
-  //         { [  ] }
-
-  [_RAISE] = LAYOUT( \
-  //,--------+--------+--------+--------+--------+--------.   ,--------+--------+--------+--------+--------+--------.
-     _______, KC_BSLS, KC_CIRC, KC_EXLM, KC_AMPR, KC_PIPE,     KC_AT  , KC_EQL , KC_PLUS, KC_ASTR, KC_PERC, KC_MINS,
-  //|--------+--------+--------+--------+--------+--------|   |--------+--------+--------+--------+--------+--------|
-     KC_LPRN, KC_HASH, KC_DLR , KC_DQT , KC_QUOT, KC_TILD,     KC_LEFT, KC_DOWN,  KC_UP , KC_RGHT, KC_GRV , KC_RPRN,
-  //|--------+--------+--------+--------+--------+--------|   |--------+--------+--------+--------+--------+--------|
-     _______, _______, _______, _______, KC_LCBR, KC_LBRC,     KC_RBRC, KC_RCBR, _______, _______, _______, _______,
-  //`--------+--------+--------+--------+--------+--------/   \--------+--------+--------+--------+--------+--------'
-                       _______, _______, _______, _______,     _______, _______, _______, RESET
-  //                  `--------+--------+--------+--------'   `--------+--------+--------+--------'
-  ),
-
-  [_LOWER] = LAYOUT( \
-  //,--------+--------+--------+--------+--------+--------.   ,--------+--------+--------+--------+--------+--------.
-     KC_F1  , KC_F2  , KC_F3  , KC_F4  , KC_F5  , KC_F6  ,     _______, KC_EQL , KC_PLUS, KC_ASTR, KC_PERC, KC_MINS,
-  //|--------+--------+--------+--------+--------+--------|   |--------+--------+--------+--------+--------+--------|
-     _______, KC_1   , KC_2   , KC_3   , KC_4   , KC_5   ,     KC_6   , KC_7   , KC_8   , KC_9   , KC_0   , _______,
-  //|--------+--------+--------+--------+--------+--------|   |--------+--------+--------+--------+--------+--------|
-     KC_F7  , KC_F8  , KC_F9  , KC_F10 , KC_F11 , KC_F12 ,     _______, _______, KC_COMM, KC_DOT , KC_SLSH, _______,
-  //`--------+--------+--------+--------+--------+--------/   \--------+--------+--------+--------+--------+--------'
-                       RESET  , _______, _______, _______,     _______, _______, _______, _______
-  //                  `--------+--------+--------+--------'   `--------+--------+--------+--------'
-  ),
+    [_QWERTY] = LAYOUT( \
+    //,--------+--------+---------+--------+---------+--------.   ,--------+---------+--------+---------+--------+--------.
+       KC_ESC , KC_Q   , KC_W    , KC_E   , KC_R    , KC_T   ,     KC_Y   , KC_U    , KC_I   , KC_O    , KC_P   , KC_MINS,
+    //|--------+--------+---------+--------+---------+--------|   |--------+---------+--------+---------+--------+--------|
+       KC_TAB , 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_RSFT,
+    //`--------+--------+---------+--------+---------+--------/   \--------+---------+--------+---------+--------+--------'
+                         KC_A_DEL, KC_G_EN, KC_L_SPC, KC_C_BS,     KC_C_BS, KC_R_ENT, KC_G_JA, KC_A_DEL
+    //                 `----------+--------+---------+--------'   `--------+---------+--------+---------'
+    ),
+
+    [_RAISE] = LAYOUT( \
+    //,--------+--------+--------+--------+--------+--------.   ,--------+--------+--------+--------+--------+--------.
+       _______, KC_BSLS, KC_CIRC, KC_EXLM, KC_AMPR, KC_PIPE,     KC_AT  , KC_EQL , KC_PLUS, KC_ASTR, KC_PERC, KC_MINS,
+    //|--------+--------+--------+--------+--------+--------|   |--------+--------+--------+--------+--------+--------|
+       KC_LPRN, KC_HASH, KC_DLR , KC_DQT , KC_QUOT, KC_TILD,     KC_LEFT, KC_DOWN,  KC_UP , KC_RGHT, KC_GRV , KC_RPRN,
+    //|--------+--------+--------+--------+--------+--------|   |--------+--------+--------+--------+--------+--------|
+       _______, _______, _______, _______, KC_LCBR, KC_LBRC,     KC_RBRC, KC_RCBR, _______, _______, _______, _______,
+    //`--------+--------+--------+--------+--------+--------/   \--------+--------+--------+--------+--------+--------'
+                         _______, _______, _______, _______,     _______, _______, _______, RESET
+    //                  `--------+--------+--------+--------'   `--------+--------+--------+--------'
+    ),
+
+    [_LOWER] = LAYOUT( \
+    //,--------+--------+--------+--------+--------+--------.   ,--------+--------+--------+--------+--------+--------.
+       KC_F1  , KC_F2  , KC_F3  , KC_F4  , KC_F5  , KC_F6  ,     _______, KC_EQL , KC_PLUS, KC_ASTR, KC_PERC, KC_MINS,
+    //|--------+--------+--------+--------+--------+--------|   |--------+--------+--------+--------+--------+--------|
+       _______, KC_1   , KC_2   , KC_3   , KC_4   , KC_5   ,     KC_6   , KC_7   , KC_8   , KC_9   , KC_0   , _______,
+    //|--------+--------+--------+--------+--------+--------|   |--------+--------+--------+--------+--------+--------|
+       KC_F7  , KC_F8  , KC_F9  , KC_F10 , KC_F11 , KC_F12 ,     _______, _______, KC_COMM, KC_DOT , KC_SLSH, _______,
+    //`--------+--------+--------+--------+--------+--------/   \--------+--------+--------+--------+--------+--------'
+                         RESET  , _______, _______, _______,     _______, _______, _______, _______
+    //                  `--------+--------+--------+--------'   `--------+--------+--------+--------'
+    ),
 };
-
-void matrix_init_user(void) {
-  //SSD1306 OLED init, make sure to add #define SSD1306OLED in config.h
-  #ifdef SSD1306OLED
-    iota_gfx_init(!has_usb());   // turns on the display
-  #endif
-}
-
-//SSD1306 OLED update loop, make sure to add #define SSD1306OLED in config.h
-#ifdef SSD1306OLED
-
-// When add source files to SRC in rules.mk, you can use functions.
-const char *read_layer_state(void);
-const char *read_logo(void);
-void set_keylog(uint16_t keycode, keyrecord_t *record);
-const char *read_keylog(void);
-const char *read_keylogs(void);
-
-// const char *read_mode_icon(bool swap);
-// const char *read_host_led_state(void);
-// void set_timelog(void);
-// const char *read_timelog(void);
-
-void matrix_scan_user(void) {
-  iota_gfx_task();
-}
-
-void matrix_render_user(struct CharacterMatrix *matrix) {
-  if (is_master) {
-    // If you want to change the display of OLED, you need to change here
-    matrix_write_ln(matrix, read_layer_state());
-    matrix_write_ln(matrix, read_keylog());
-    matrix_write_ln(matrix, read_keylogs());
-    //matrix_write_ln(matrix, read_mode_icon(keymap_config.swap_lalt_lgui));
-    //matrix_write_ln(matrix, read_host_led_state());
-    //matrix_write_ln(matrix, read_timelog());
-  } else {
-    matrix_write(matrix, read_logo());
-  }
-}
-
-void matrix_update(struct CharacterMatrix *dest, const struct CharacterMatrix *source) {
-  if (memcmp(dest->display, source->display, sizeof(dest->display))) {
-    memcpy(dest->display, source->display, sizeof(dest->display));
-    dest->dirty = true;
-  }
-}
-
-void iota_gfx_task_user(void) {
-  struct CharacterMatrix matrix;
-  matrix_clear(&matrix);
-  matrix_render_user(&matrix);
-  matrix_update(&display, &matrix);
-}
-#endif//SSD1306OLED
-
-bool process_record_user(uint16_t keycode, keyrecord_t *record) {
-  if (record->event.pressed) {
-#ifdef SSD1306OLED
-    set_keylog(keycode, record);
-#endif
-    // set_timelog();
-  }
-
-  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);
-      } else {
-        layer_off(_LOWER);
-      }
-      return false;
-      break;
-    case RAISE:
-      if (record->event.pressed) {
-        layer_on(_RAISE);
-      } else {
-        layer_off(_RAISE);
-      }
-      return false;
-      break;
-  }
-  return true;
-}
diff --git a/keyboards/claw44/keymaps/yfuku/config.h b/keyboards/claw44/keymaps/oled/config.h
index 244ffa7096..edde2c67ca 100644
--- a/keyboards/claw44/keymaps/yfuku/config.h
+++ b/keyboards/claw44/keymaps/oled/config.h
@@ -20,17 +20,5 @@ along with this program.  If not, see <http://www.gnu.org/licenses/>.
 
 #pragma once
 
-//#define USE_MATRIX_I2C
-
-/* Select hand configuration */
-
 #define MASTER_LEFT
-// #define MASTER_RIGHT
-// #define EE_HANDS
-
-#define SSD1306OLED
-
-#define USE_SERIAL_PD2
-
-#define TAPPING_TERM 180
-#define IGNORE_MOD_TAP_INTERRUPT
+#define OLED_FONT_H "keyboards/claw44/lib/glcdfont.c"
diff --git a/keyboards/claw44/keymaps/oled/keymap.c b/keyboards/claw44/keymaps/oled/keymap.c
new file mode 100644
index 0000000000..0d10c371a2
--- /dev/null
+++ b/keyboards/claw44/keymaps/oled/keymap.c
@@ -0,0 +1,137 @@
+#include QMK_KEYBOARD_H
+#include <stdio.h>
+
+// 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.
+
+enum layer_number {
+    _QWERTY = 0,
+    _RAISE,
+    _LOWER,
+};
+
+#define KC_ KC_TRNS
+#define KC_RST RESET
+#define KC_L_SPC LT(_LOWER, KC_SPC)  // lower
+#define KC_R_ENT LT(_RAISE, KC_ENT)  // raise
+#define KC_G_JA LGUI_T(KC_LANG1)     // cmd or win
+#define KC_G_EN LGUI_T(KC_LANG2)     // cmd or win
+#define KC_C_BS LCTL_T(KC_BSPC)      // ctrl
+#define KC_A_DEL ALT_T(KC_DEL)       // alt
+
+const uint16_t PROGMEM keymaps[][MATRIX_ROWS][MATRIX_COLS] = {
+    [_QWERTY] = LAYOUT( \
+    //,--------+--------+---------+--------+---------+--------.   ,--------+---------+--------+---------+--------+--------.
+        KC_ESC , KC_Q   , KC_W    , KC_E   , KC_R    , KC_T   ,     KC_Y   , KC_U    , KC_I   , KC_O    , KC_P   , KC_MINS,
+    //|--------+--------+---------+--------+---------+--------|   |--------+---------+--------+---------+--------+--------|
+        KC_TAB , 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_RSFT,
+    //`--------+--------+---------+--------+---------+--------/   \--------+---------+--------+---------+--------+--------'
+                          KC_A_DEL, KC_G_EN, KC_L_SPC, KC_C_BS,     KC_C_BS, KC_R_ENT, KC_G_JA, KC_A_DEL
+    //                 `----------+--------+---------+--------'   `--------+---------+--------+---------'
+    ),
+
+    [_RAISE] = LAYOUT( \
+    //,--------+--------+--------+--------+--------+--------.   ,--------+--------+--------+--------+--------+--------.
+        _______, KC_BSLS, KC_CIRC, KC_EXLM, KC_AMPR, KC_PIPE,     KC_AT  , KC_EQL , KC_PLUS, KC_ASTR, KC_PERC, KC_MINS,
+    //|--------+--------+--------+--------+--------+--------|   |--------+--------+--------+--------+--------+--------|
+        KC_LPRN, KC_HASH, KC_DLR , KC_DQT , KC_QUOT, KC_TILD,     KC_LEFT, KC_DOWN,  KC_UP , KC_RGHT, KC_GRV , KC_RPRN,
+    //|--------+--------+--------+--------+--------+--------|   |--------+--------+--------+--------+--------+--------|
+        _______, _______, _______, _______, KC_LCBR, KC_LBRC,     KC_RBRC, KC_RCBR, _______, _______, _______, _______,
+    //`--------+--------+--------+--------+--------+--------/   \--------+--------+--------+--------+--------+--------'
+                          _______, _______, _______, _______,     _______, _______, _______, RESET
+    //                  `--------+--------+--------+--------'   `--------+--------+--------+--------'
+    ),
+
+    [_LOWER] = LAYOUT( \
+    //,--------+--------+--------+--------+--------+--------.   ,--------+--------+--------+--------+--------+--------.
+        KC_F1  , KC_F2  , KC_F3  , KC_F4  , KC_F5  , KC_F6  ,     _______, KC_EQL , KC_PLUS, KC_ASTR, KC_PERC, KC_MINS,
+    //|--------+--------+--------+--------+--------+--------|   |--------+--------+--------+--------+--------+--------|
+        _______, KC_1   , KC_2   , KC_3   , KC_4   , KC_5   ,     KC_6   , KC_7   , KC_8   , KC_9   , KC_0   , _______,
+    //|--------+--------+--------+--------+--------+--------|   |--------+--------+--------+--------+--------+--------|
+        KC_F7  , KC_F8  , KC_F9  , KC_F10 , KC_F11 , KC_F12 ,     _______, _______, KC_COMM, KC_DOT , KC_SLSH, _______,
+    //`--------+--------+--------+--------+--------+--------/   \--------+--------+--------+--------+--------+--------'
+                          RESET  , _______, _______, _______,     _______, _______, _______, _______
+    //                  `--------+--------+--------+--------'   `--------+--------+--------+--------'
+    ),
+};
+
+#ifdef OLED_DRIVER_ENABLE
+
+void render_layer_state(void) {
+    switch (get_highest_layer(layer_state)) {
+        case _QWERTY:
+            oled_write_ln_P(PSTR("Layer: Default"), false);
+            break;
+        case _RAISE:
+            oled_write_ln_P(PSTR("Layer: Raise"), false);
+            break;
+        case _LOWER:
+            oled_write_ln_P(PSTR("Layer: Lower"), false);
+            break;
+        default:
+            oled_write_ln_P(PSTR("Layer: Undefined"), false);
+    }
+}
+
+void render_logo(void) {
+    static const char PROGMEM logo[] = {0x80, 0x81, 0x82, 0x83, 0x84, 0x85, 0x86, 0x87, 0x88, 0x89, 0x8a, 0x8b, 0x8c, 0x8d, 0x8e, 0x8f, 0x90, 0x91, 0x92, 0x93, 0x94, 0xa0, 0xa1, 0xa2, 0xa3, 0xa4, 0xa5, 0xa6, 0xa7, 0xa8, 0xa9, 0xaa, 0xab, 0xac, 0xad, 0xae, 0xaf, 0xb0, 0xb1, 0xb2, 0xb3, 0xb4, 0xc0, 0xc1, 0xc2, 0xc3, 0xc4, 0xc5, 0xc6, 0xc7, 0xc8, 0xc9, 0xca, 0xcb, 0xcc, 0xcd, 0xce, 0xcf, 0xd0, 0xd1, 0xd2, 0xd3, 0xd4, 0};
+    oled_write_P(logo, false);
+}
+
+char keylog_str[24]  = {};
+char keylogs_str[21] = {};
+int  keylogs_str_idx = 0;
+
+const char code_to_name[60] = {' ', ' ', ' ', ' ', 'a', 'b', 'c', 'd', 'e', 'f', 'g', 'h', 'i', 'j', 'k', 'l', 'm', 'n', 'o', 'p', 'q', 'r', 's', 't', 'u', 'v', 'w', 'x', 'y', 'z', '1', '2', '3', '4', '5', '6', '7', '8', '9', '0', 'R', 'E', 'B', 'T', ' ', ' ', ' ', ' ', ' ', ' ', ' ', ';', '\'', ' ', ',', '.', '/', ' ', ' ', ' '};
+
+void set_keylog(uint16_t keycode, keyrecord_t *record) {
+    char name = ' ';
+    if (keycode < 60) {
+        name = code_to_name[keycode];
+    }
+
+    // update keylog
+    snprintf(keylog_str, sizeof(keylog_str), "%dx%d, k%2d : %c", record->event.key.row, record->event.key.col, keycode, name);
+
+    // update keylogs
+    if (keylogs_str_idx == sizeof(keylogs_str) - 1) {
+        keylogs_str_idx = 0;
+        for (int i = 0; i < sizeof(keylogs_str) - 1; i++) {
+            keylogs_str[i] = ' ';
+        }
+    }
+
+    keylogs_str[keylogs_str_idx] = name;
+    keylogs_str_idx++;
+}
+
+const char *read_keylog(void) { return keylog_str; }
+const char *read_keylogs(void) { return keylogs_str; }
+
+void oled_task_user(void) {
+    if (is_keyboard_master()) {
+        render_layer_state();
+        oled_write_ln(read_keylog(), false);
+        oled_write_ln(read_keylogs(), false);
+    } else {
+        render_logo();
+    }
+}
+
+bool process_record_user(uint16_t keycode, keyrecord_t *record) {
+    if (record->event.pressed) {
+        set_keylog(keycode, record);
+    }
+    return true;
+}
+
+oled_rotation_t oled_init_user(oled_rotation_t rotation) {
+    if (!is_keyboard_master()) return OLED_ROTATION_180;
+    return rotation;
+}
+
+#endif
diff --git a/keyboards/claw44/keymaps/oled/rules.mk b/keyboards/claw44/keymaps/oled/rules.mk
new file mode 100644
index 0000000000..c582662134
--- /dev/null
+++ b/keyboards/claw44/keymaps/oled/rules.mk
@@ -0,0 +1 @@
+OLED_DRIVER_ENABLE = yes
diff --git a/keyboards/claw44/keymaps/yfuku/keymap.c b/keyboards/claw44/keymaps/yfuku/keymap.c
deleted file mode 100644
index 77d459b928..0000000000
--- a/keyboards/claw44/keymaps/yfuku/keymap.c
+++ /dev/null
@@ -1,221 +0,0 @@
-#include QMK_KEYBOARD_H
-#ifdef PROTOCOL_LUFA
-  #include "lufa.h"
-  #include "split_util.h"
-#endif
-#ifdef SSD1306OLED
-  #include "ssd1306.h"
-#endif
-
-extern keymap_config_t keymap_config;
-
-extern uint8_t is_master;
-
-// 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.
-enum custom_keycodes {
-  QWERTY = SAFE_RANGE,
-  LOWER,
-  RAISE
-};
-
-enum macro_keycodes {
-  KC_SAMPLEMACRO,
-};
-
-// common
-#define KC_ KC_TRNS
-#define KC_XXXX KC_NO
-#define KC_RST RESET
-#define KC_VD KC__VOLDOWN
-#define KC_VU KC__VOLUP
-
-// layer
-#define KC_L_SPC LT(_LOWER, KC_SPC)
-#define KC_R_ENT LT(_RAISE, KC_ENT)
-
-// shift_t
-#define KC_S_TAB LSFT_T(KC_TAB)
-#define KC_S_ESC LSFT_T(KC_ESC)
-#define KC_S_JA LSFT_T(KC_LANG1)
-#define KC_S_EN LSFT_T(KC_LANG2)
-
-// cmd_t
-#define KC_M_F LCMD_T(KC_F)
-#define KC_M_D LCMD_T(KC_D)
-#define KC_M_J LCMD_T(KC_J)
-#define KC_M_K LCMD_T(KC_K)
-
-// ctl_t
-#define KC_C_S LCTL_T(KC_S)
-#define KC_C_L LCTL_T(KC_L)
-#define KC_C_BS LCTL_T(KC_BSPC)
-
-// alt_t
-#define KC_A_D ALT_T(KC_D)
-#define KC_A_K ALT_T(KC_K)
-#define KC_A_Z ALT_T(KC_Z)
-#define KC_A_SL ALT_T(KC_SLSH)
-#define KC_A_DEL ALT_T(KC_DEL)
-
-// cmd+shift_t
-#define KC_MS_Q SCMD_T(KC_Q)
-#define KC_MS_A SCMD_T(KC_A)
-#define KC_MS_S SCMD_T(KC_S)
-#define KC_MS_SC SCMD_T(KC_SCLN)
-#define KC_MS_ESC SCMD_T(KC_ESC)
-
-//
-#define KC_MR RCMD(KC_R)
-#define KC_MF RCMD(KC_F)
-#define KC_MW RCMD(KC_W)
-#define KC_MX RCMD(KC_X)
-#define KC_MC RCMD(KC_C)
-#define KC_MV RCMD(KC_V)
-#define KC_MTAB RCMD(KC_TAB)
-#define KC_MSF RCMD(RSFT(KC_F))
-#define KC_MSR RCMD(RSFT(KC_R))
-#define KC_MST RCMD(RSFT(KC_T))
-
-const uint16_t PROGMEM keymaps[][MATRIX_ROWS][MATRIX_COLS] = {
-
-  // M_ = LCMD_T(
-  // A_ = ALT_T(
-  // C_ = LCTL_T(
-  // MS_ = SMD_T(
-  // R_ = LT(_RAISE
-  // L_ = LT(_LOWER
-
-  [_QWERTY] = LAYOUT_kc( \
-  //,----+----+----+----+----+----.     ,----+----+----+----+----+----.
-     ESC , Q  , W  , E  , R  , T  ,       Y  , U  , I  , O  , P  ,MINS,
-  //|----+----+----+----+----+----|     |----+----+----+----+----+----|
-    S_TAB, A  ,C_S , D  ,M_F , G  ,       H  ,M_J , K  ,C_L ,SCLN,S_ESC,
-  //|----+----+----+----+----+----+     |----+----+----+----+----+----|
-         , Z  , X  , C  , V  , B  ,       N  , M  ,COMM,DOT ,SLSH,    ,
-  //`----+----+----+----+----+----/     \----+----+----+----+----+----'
-             A_DEL,S_EN,L_SPC,C_BS,      C_BS,R_ENT,S_JA,A_DEL
-  //          `----+----+----+----'     `----+----+----+----'
-  ),
-
-  //   \ ^ ! & |  @ = + * % -
-  // ( # $ " ' ~  ← ↓ ↑ → ` )
-  //         { [  ] }
-
-  [_RAISE] = LAYOUT_kc( \
-  //,----+----+----+----+----+----.     ,----+----+----+----+----+----.
-         ,BSLS,CIRC,EXLM,AMPR,PIPE,      AT  ,EQL ,PLUS,ASTR,PERC,MINS,
-  //|----+----+----+----+----+----|     |----+----+----+----+----+----|
-     LPRN,HASH,DLR ,DQT ,QUOT,TILD,      LEFT,DOWN, UP ,RGHT,GRV ,RPRN,
-  //|----+----+----+----+----+----|     |----+----+----+----+----+----|
-        ,     ,    ,    ,LCBR,LBRC,      RBRC,RCBR,    ,    ,    ,    ,
-  //`----+----+----+----+----+----/     \----+----+----+----+----+----'
-                   ,    ,BSPC,    ,          ,    ,    ,RST
-  //          `----+----+----+----'     `----+----+----+----'
-  ),
-
-  [_LOWER] = LAYOUT_kc( \
-  //,----+----+----+----+----+----.     ,----+----+----+----+----+----.
-         ,    ,    ,MSF ,MSR ,MST ,          ,EQL ,PLUS,ASTR,PERC,MINS,
-  //|----+----+----+----+----+----|     |----+----+----+----+----+----|
-         , 1  , 2  , 3  , 4  , 5  ,       6  , 7  , 8  , 9  , 0  ,    ,
-  //|----+----+----+----+----+----|     |----+----+----+----+----+----|
-         ,    ,    ,    ,    ,    ,          ,    ,COMM,DOT ,SLSH,    ,
-  //`----+----+----+--+-+----+----/     \----+----+----+----+----+----'
-               RST ,    ,    ,    ,          ,DEL ,    ,
-  //          `----+----+----+----'     `----+----+----+----'
-  ),
-};
-
-void matrix_init_user(void) {
-  //SSD1306 OLED init, make sure to add #define SSD1306OLED in config.h
-  #ifdef SSD1306OLED
-    iota_gfx_init(!has_usb());   // turns on the display
-  #endif
-}
-
-//SSD1306 OLED update loop, make sure to add #define SSD1306OLED in config.h
-#ifdef SSD1306OLED
-
-// When add source files to SRC in rules.mk, you can use functions.
-const char *read_layer_state(void);
-const char *read_logo(void);
-void set_keylog(uint16_t keycode, keyrecord_t *record);
-const char *read_keylog(void);
-const char *read_keylogs(void);
-
-// const char *read_mode_icon(bool swap);
-// const char *read_host_led_state(void);
-// void set_timelog(void);
-// const char *read_timelog(void);
-
-void matrix_scan_user(void) {
-  iota_gfx_task();
-}
-
-void matrix_render_user(struct CharacterMatrix *matrix) {
-  if (is_master) {
-    // If you want to change the display of OLED, you need to change here
-    matrix_write_ln(matrix, read_layer_state());
-    matrix_write_ln(matrix, read_keylog());
-    matrix_write_ln(matrix, read_keylogs());
-    //matrix_write_ln(matrix, read_mode_icon(keymap_config.swap_lalt_lgui));
-    //matrix_write_ln(matrix, read_host_led_state());
-    //matrix_write_ln(matrix, read_timelog());
-  } else {
-    matrix_write(matrix, read_logo());
-  }
-}
-
-void matrix_update(struct CharacterMatrix *dest, const struct CharacterMatrix *source) {
-  if (memcmp(dest->display, source->display, sizeof(dest->display))) {
-    memcpy(dest->display, source->display, sizeof(dest->display));
-    dest->dirty = true;
-  }
-}
-
-void iota_gfx_task_user(void) {
-  struct CharacterMatrix matrix;
-  matrix_clear(&matrix);
-  matrix_render_user(&matrix);
-  matrix_update(&display, &matrix);
-}
-#endif//SSD1306OLED
-
-bool process_record_user(uint16_t keycode, keyrecord_t *record) {
-  if (record->event.pressed) {
-#ifdef SSD1306OLED
-    set_keylog(keycode, record);
-#endif
-    // set_timelog();
-  }
-
-  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);
-      } else {
-        layer_off(_LOWER);
-      }
-      return false;
-      break;
-    case RAISE:
-      if (record->event.pressed) {
-        layer_on(_RAISE);
-      } else {
-        layer_off(_RAISE);
-      }
-      return false;
-      break;
-  }
-  return true;
-}
-
diff --git a/keyboards/claw44/lib/glcdfont.c b/keyboards/claw44/lib/glcdfont.c
index 9fa1c806aa..91f53d9c24 100644
--- a/keyboards/claw44/lib/glcdfont.c
+++ b/keyboards/claw44/lib/glcdfont.c
@@ -1,7 +1,17 @@
 // This is the 'classic' fixed-space bitmap font for Adafruit_GFX since 1.0.
 // See gfxfont.h for newer custom bitmap font info.
 
-#include "progmem.h"
+#ifndef FONT5X7_H
+#define FONT5X7_H
+
+#ifdef __AVR__
+ #include <avr/io.h>
+ #include <avr/pgmspace.h>
+#elif defined(ESP8266)
+ #include <pgmspace.h>
+#else
+ #define PROGMEM
+#endif
 
 // Standard ASCII 5x7 font
 const unsigned char font[] PROGMEM = {
@@ -230,3 +240,4 @@ const unsigned char font[] PROGMEM = {
 0x00, 0x00, 0x00, 0x00, 0x00, 0x00,
 0x00, 0x00, 0x00, 0x00, 0x00, 0x00,
 };
+#endif // FONT5X7_H
diff --git a/keyboards/claw44/lib/host_led_state_reader.c b/keyboards/claw44/lib/host_led_state_reader.c
deleted file mode 100644
index 980823b318..0000000000
--- a/keyboards/claw44/lib/host_led_state_reader.c
+++ /dev/null
@@ -1,15 +0,0 @@
-#include <stdio.h>
-#include "claw44.h"
-
-char host_led_state_str[24];
-
-const char *read_host_led_state(void)
-{
-  uint8_t leds = host_keyboard_leds();
-  snprintf(host_led_state_str, sizeof(host_led_state_str), "NL:%s CL:%s SL:%s",
-           (leds & (1 << USB_LED_NUM_LOCK)) ? "on" : "- ",
-           (leds & (1 << USB_LED_CAPS_LOCK)) ? "on" : "- ",
-           (leds & (1 << USB_LED_SCROLL_LOCK)) ? "on" : "- ");
-
-  return host_led_state_str;
-}
diff --git a/keyboards/claw44/lib/keylogger.c b/keyboards/claw44/lib/keylogger.c
deleted file mode 100644
index 092b6929bc..0000000000
--- a/keyboards/claw44/lib/keylogger.c
+++ /dev/null
@@ -1,45 +0,0 @@
-#include <stdio.h>
-#include "claw44.h"
-
-char keylog_str[24] = {};
-char keylogs_str[21] = {};
-int keylogs_str_idx = 0;
-
-const char code_to_name[60] = {
-    ' ', ' ', ' ', ' ', 'a', 'b', 'c', 'd', 'e', 'f',
-    'g', 'h', 'i', 'j', 'k', 'l', 'm', 'n', 'o', 'p',
-    'q', 'r', 's', 't', 'u', 'v', 'w', 'x', 'y', 'z',
-    '1', '2', '3', '4', '5', '6', '7', '8', '9', '0',
-    'R', 'E', 'B', 'T', ' ', ' ', ' ', ' ', ' ', ' ',
-    ' ', ';', '\'', ' ', ',', '.', '/', ' ', ' ', ' '};
-
-void set_keylog(uint16_t keycode, keyrecord_t *record) {
-  char name = ' ';
-  if (keycode < 60) {
-    name = code_to_name[keycode];
-  }
-
-  // update keylog
-  snprintf(keylog_str, sizeof(keylog_str), "%dx%d, k%2d : %c",
-           record->event.key.row, record->event.key.col,
-           keycode, name);
-
-  // update keylogs
-  if (keylogs_str_idx == sizeof(keylogs_str) - 1) {
-    keylogs_str_idx = 0;
-    for (int i = 0; i < sizeof(keylogs_str) - 1; i++) {
-      keylogs_str[i] = ' ';
-    }
-  }
-
-  keylogs_str[keylogs_str_idx] = name;
-  keylogs_str_idx++;
-}
-
-const char *read_keylog(void) {
-  return keylog_str;
-}
-
-const char *read_keylogs(void) {
-  return keylogs_str;
-}
diff --git a/keyboards/claw44/lib/layer_state_reader.c b/keyboards/claw44/lib/layer_state_reader.c
deleted file mode 100644
index d92b6df582..0000000000
--- a/keyboards/claw44/lib/layer_state_reader.c
+++ /dev/null
@@ -1,35 +0,0 @@
-
-#include QMK_KEYBOARD_H
-#include <stdio.h>
-#include "claw44.h"
-
-#define L_BASE 0
-#define L_LOWER (1<<_LOWER)
-#define L_RAISE (1<<_RAISE)
-#define L_ADJUST (1<<_ADJUST)
-#define L_ADJUST_TRI (L_ADJUST|L_RAISE|L_LOWER)
-
-char layer_state_str[24];
-
-const char *read_layer_state(void) {
-  switch (layer_state)
-  {
-  case L_BASE:
-    snprintf(layer_state_str, sizeof(layer_state_str), "Layer: Default");
-    break;
-  case L_RAISE:
-    snprintf(layer_state_str, sizeof(layer_state_str), "Layer: Raise");
-    break;
-  case L_LOWER:
-    snprintf(layer_state_str, sizeof(layer_state_str), "Layer: Lower");
-    break;
-  case L_ADJUST:
-  case L_ADJUST_TRI:
-    snprintf(layer_state_str, sizeof(layer_state_str), "Layer: Adjust");
-    break;
-  default:
-    snprintf(layer_state_str, sizeof(layer_state_str), "Layer: Undef-%ld", layer_state);
-  }
-
-  return layer_state_str;
-}
diff --git a/keyboards/claw44/lib/logo_reader.c b/keyboards/claw44/lib/logo_reader.c
deleted file mode 100644
index b5b437b2b8..0000000000
--- a/keyboards/claw44/lib/logo_reader.c
+++ /dev/null
@@ -1,11 +0,0 @@
-#include "claw44.h"
-
-const char *read_logo(void) {
-  static char logo[] = {
-      0x80, 0x81, 0x82, 0x83, 0x84, 0x85, 0x86, 0x87, 0x88, 0x89, 0x8a, 0x8b, 0x8c, 0x8d, 0x8e, 0x8f, 0x90, 0x91, 0x92, 0x93, 0x94,
-      0xa0, 0xa1, 0xa2, 0xa3, 0xa4, 0xa5, 0xa6, 0xa7, 0xa8, 0xa9, 0xaa, 0xab, 0xac, 0xad, 0xae, 0xaf, 0xb0, 0xb1, 0xb2, 0xb3, 0xb4,
-      0xc0, 0xc1, 0xc2, 0xc3, 0xc4, 0xc5, 0xc6, 0xc7, 0xc8, 0xc9, 0xca, 0xcb, 0xcc, 0xcd, 0xce, 0xcf, 0xd0, 0xd1, 0xd2, 0xd3, 0xd4,
-      0};
-
-  return logo;
-}
diff --git a/keyboards/claw44/lib/mode_icon_reader.c b/keyboards/claw44/lib/mode_icon_reader.c
deleted file mode 100644
index a9272bb9a7..0000000000
--- a/keyboards/claw44/lib/mode_icon_reader.c
+++ /dev/null
@@ -1,15 +0,0 @@
-#include <stdio.h>
-#include "claw44.h"
-
-char mode_icon[24];
-
-const char *read_mode_icon(bool swap) {
-  static char logo[][2][3] = {{{0x95, 0x96, 0}, {0xb5, 0xb6, 0}}, {{0x97, 0x98, 0}, {0xb7, 0xb8, 0}}};
-  if (swap == false) {
-    snprintf(mode_icon, sizeof(mode_icon), "%s\n%s", logo[0][0], logo[0][1]);
-  } else {
-    snprintf(mode_icon, sizeof(mode_icon), "%s\n%s", logo[1][0], logo[1][1]);
-  }
-
-  return mode_icon;
-}
diff --git a/keyboards/claw44/lib/rgb_state_reader.c b/keyboards/claw44/lib/rgb_state_reader.c
deleted file mode 100644
index e0efe2e528..0000000000
--- a/keyboards/claw44/lib/rgb_state_reader.c
+++ /dev/null
@@ -1,15 +0,0 @@
-#ifdef RGBLIGHT_ENABLE
-
-#include QMK_KEYBOARD_H
-#include <stdio.h>
-
-extern rgblight_config_t rgblight_config;
-char rbf_info_str[24];
-const char *read_rgb_info(void) {
-
-  snprintf(rbf_info_str, sizeof(rbf_info_str), "%s %2d h%3d s%3d v%3d",
-    rgblight_config.enable ? "on" : "- ", rgblight_config.mode,
-    rgblight_config.hue, rgblight_config.sat, rgblight_config.val);
-  return rbf_info_str;
-}
-#endif
diff --git a/keyboards/claw44/lib/timelogger.c b/keyboards/claw44/lib/timelogger.c
deleted file mode 100644
index ecd4ed3ea8..0000000000
--- a/keyboards/claw44/lib/timelogger.c
+++ /dev/null
@@ -1,16 +0,0 @@
-#include <stdio.h>
-#include "claw44.h"
-
-char timelog_str[24] = {};
-int last_time = 0;
-int elapsed_time = 0;
-
-void set_timelog(void) {
-  elapsed_time = timer_elapsed(last_time);
-  last_time = timer_read();
-  snprintf(timelog_str, sizeof(timelog_str), "lt:%5d, et:%5d", last_time, elapsed_time);
-}
-
-const char *read_timelog(void) {
-  return timelog_str;
-}
diff --git a/keyboards/claw44/rev1/config.h b/keyboards/claw44/rev1/config.h
index f3406fee5c..dc6e49dd9a 100644
--- a/keyboards/claw44/rev1/config.h
+++ b/keyboards/claw44/rev1/config.h
@@ -19,22 +19,21 @@ along with this program.  If not, see <http://www.gnu.org/licenses/>.
 #pragma once
 
 /* USB Device descriptor parameter */
-#define VENDOR_ID       0xFEED
-#define PRODUCT_ID      0x3060
-#define DEVICE_VER      0x0001
-#define MANUFACTURER    yfuku
-#define PRODUCT         claw44
-#define DESCRIPTION     A split keyboard with 3x6 vertically staggered keys and 4 thumb keys
+#define VENDOR_ID 0xFEED
+#define PRODUCT_ID 0x3060
+#define DEVICE_VER 0x0001
+#define MANUFACTURER yfuku
+#define PRODUCT claw44
+#define DESCRIPTION A split keyboard with 3x6 vertically staggered keys and 4 thumb keys
 
 /* key matrix size */
-// Rows are doubled-up
 #define MATRIX_ROWS 8
-#define MATRIX_COLS 7
+#define MATRIX_COLS 6
 #define MATRIX_ROW_PINS { D4, C6, D7, E6 }
-
-// wiring of each half
-#define MATRIX_COL_PINS { F4, F5, F6, F7, B1, B3, B2 }
-// #define MATRIX_COL_PINS { B2, B3, B1, F7, F6, F5, F4 } //uncomment this line and comment line above if you need to reverse left-to-right key order
+#define MATRIX_COL_PINS { F4, F5, F6, F7, B1, B3 }
+#define UNUSED_PINS
+#define DIODE_DIRECTION COL2ROW
+#define SOFT_SERIAL_PIN D2
 
 /* define if matrix has ghost */
 //#define MATRIX_HAS_GHOST
diff --git a/keyboards/claw44/rev1/matrix.c b/keyboards/claw44/rev1/matrix.c
deleted file mode 100644
index a5896d9792..0000000000
--- a/keyboards/claw44/rev1/matrix.c
+++ /dev/null
@@ -1,358 +0,0 @@
-/*
-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 <string.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 "quantum.h"
-
-#ifdef USE_MATRIX_I2C
-#  include "i2c.h"
-#else // USE_SERIAL
-#  include "split_scomm.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;
-uint8_t is_master = 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);
-static uint8_t matrix_master_scan(void);
-
-
-__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();
-
-    setPinOutput(B0);
-    setPinOutput(D5);
-    writePinHigh(B0);
-    writePinHigh(D5);
-
-    // initialize matrix state: all keys off
-    for (uint8_t i=0; i < MATRIX_ROWS; i++) {
-        matrix[i] = 0;
-        matrix_debouncing[i] = 0;
-    }
-
-    is_master = has_usb();
-
-    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_MATRIX_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(int master_changed) {
-    int slaveOffset = (isLeftHand) ? (ROWS_PER_HAND) : 0;
-#ifdef SERIAL_USE_MULTI_TRANSACTION
-    int ret=serial_update_buffers(master_changed);
-#else
-    int ret=serial_update_buffers();
-#endif
-    if (ret ) {
-        if(ret==2) writePinLow(B0);
-        return 1;
-    }
-    writePinHigh(B0);
-    memcpy(&matrix[slaveOffset],
-        (void *)serial_slave_buffer, SERIAL_SLAVE_BUFFER_LENGTH);
-    return 0;
-}
-#endif
-
-uint8_t matrix_scan(void)
-{
-    if (is_master) {
-        matrix_master_scan();
-    }else{
-        matrix_slave_scan();
-        int offset = (isLeftHand) ? ROWS_PER_HAND : 0;
-        memcpy(&matrix[offset],
-               (void *)serial_master_buffer, SERIAL_MASTER_BUFFER_LENGTH);
-        matrix_scan_quantum();
-    }
-    return 1;
-}
-
-
-uint8_t matrix_master_scan(void) {
-
-    int ret = _matrix_scan();
-    int mchanged = 1;
-
-    int offset = (isLeftHand) ? 0 : ROWS_PER_HAND;
-
-#ifdef USE_MATRIX_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
-  #ifdef SERIAL_USE_MULTI_TRANSACTION
-    mchanged = memcmp((void *)serial_master_buffer,
-		      &matrix[offset], SERIAL_MASTER_BUFFER_LENGTH);
-  #endif
-    memcpy((void *)serial_master_buffer,
-	   &matrix[offset], SERIAL_MASTER_BUFFER_LENGTH);
-#endif
-
-#ifdef USE_MATRIX_I2C
-    if( i2c_transaction() ) {
-#else // USE_SERIAL
-    if( serial_transaction(mchanged) ) {
-#endif
-        // turn on the indicator led when halves are disconnected
-        writePinLow(D5);
-
-        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
-        writePinHigh(D5);
-        error_count = 0;
-    }
-    matrix_scan_quantum();
-    return ret;
-}
-
-void matrix_slave_scan(void) {
-    _matrix_scan();
-
-    int offset = (isLeftHand) ? 0 : ROWS_PER_HAND;
-
-#ifdef USE_MATRIX_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
-  #ifdef SERIAL_USE_MULTI_TRANSACTION
-    int change = 0;
-  #endif
-    for (int i = 0; i < ROWS_PER_HAND; ++i) {
-  #ifdef SERIAL_USE_MULTI_TRANSACTION
-        if( serial_slave_buffer[i] != matrix[offset+i] )
-	    change = 1;
-  #endif
-        serial_slave_buffer[i] = matrix[offset+i];
-    }
-  #ifdef SERIAL_USE_MULTI_TRANSACTION
-    slave_buffer_change_count += change;
-  #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;
-}
-
-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/claw44/rev1/rev1.c b/keyboards/claw44/rev1/rev1.c
index 9529636f56..520a869e57 100644
--- a/keyboards/claw44/rev1/rev1.c
+++ b/keyboards/claw44/rev1/rev1.c
@@ -1,8 +1 @@
-#include "claw44.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
+#include "rev1.h"
diff --git a/keyboards/claw44/rev1/rev1.h b/keyboards/claw44/rev1/rev1.h
index c6c9057fdc..79ae9586db 100644
--- a/keyboards/claw44/rev1/rev1.h
+++ b/keyboards/claw44/rev1/rev1.h
@@ -1,55 +1,33 @@
 #pragma once
 
-#include "../claw44.h"
-
 #include "quantum.h"
 
-#ifdef RGBLIGHT_ENABLE
-//rgb led driver
-#include "ws2812.h"
-#endif
-
-#ifdef USE_I2C
-#include <stddef.h>
-#ifdef __AVR__
-	#include <avr/io.h>
-	#include <avr/interrupt.h>
-#endif
-#endif
-
 #define LAYOUT( \
-  L00, L01, L02, L03, L04, L05,           R00, R01, R02, R03, R04, R05, \
-  L10, L11, L12, L13, L14, L15,           R10, R11, R12, R13, R14, R15, \
-  L20, L21, L22, L23, L24, L25,           R20, R21, R22, R23, R24, R25, \
-                 L30, L31, L32, L33, R30, R31, R32, R33 \
-  ) \
-  { \
-    { L00, L01, L02, L03, L04, L05 }, \
-    { L10, L11, L12, L13, L14, L15 }, \
-    { L20, L21, L22, L23, L24, L25 }, \
-    { KC_NO, KC_NO, L30, L31, L32, L33 }, \
-    { R05, R04, R03, R02, R01, R00 }, \
-    { R15, R14, R13, R12, R11, R10 }, \
-    { R25, R24, R23, R22, R21, R20 }, \
-    { KC_NO, KC_NO, R33, R32, R31, R30 } \
-  }
+    L00, L01, L02, L03, L04, L05,           R00, R01, R02, R03, R04, R05, \
+    L10, L11, L12, L13, L14, L15,           R10, R11, R12, R13, R14, R15, \
+    L20, L21, L22, L23, L24, L25,           R20, R21, R22, R23, R24, R25, \
+                   L30, L31, L32, L33, R30, R31, R32, R33 \
+    ) \
+    { \
+        { L00, L01, L02, L03, L04, L05 }, \
+        { L10, L11, L12, L13, L14, L15 }, \
+        { L20, L21, L22, L23, L24, L25 }, \
+        { KC_NO, KC_NO, L30, L31, L32, L33 }, \
+        { R05, R04, R03, R02, R01, R00 }, \
+        { R15, R14, R13, R12, R11, R10 }, \
+        { R25, R24, R23, R22, R21, R20 }, \
+        { KC_NO, KC_NO, R33, R32, R31, R30 } \
+    }
 
 #define LAYOUT_kc( \
-  L00, L01, L02, L03, L04, L05,           R00, R01, R02, R03, R04, R05, \
-  L10, L11, L12, L13, L14, L15,           R10, R11, R12, R13, R14, R15, \
-  L20, L21, L22, L23, L24, L25,           R20, R21, R22, R23, R24, R25, \
-                 L30, L31, L32, L33, R30, R31, R32, R33 \
-  ) \
-  LAYOUT( \
-    KC_##L00, KC_##L01, KC_##L02, KC_##L03, KC_##L04, KC_##L05,                     KC_##R00, KC_##R01, KC_##R02, KC_##R03, KC_##R04, KC_##R05, \
-    KC_##L10, KC_##L11, KC_##L12, KC_##L13, KC_##L14, KC_##L15,                     KC_##R10, KC_##R11, KC_##R12, KC_##R13, KC_##R14, KC_##R15, \
-    KC_##L20, KC_##L21, KC_##L22, KC_##L23, KC_##L24, KC_##L25,                     KC_##R20, KC_##R21, KC_##R22, KC_##R23, KC_##R24, KC_##R25, \
-                                  KC_##L30, KC_##L31, KC_##L32, KC_##L33, KC_##R30, KC_##R31, KC_##R32, KC_##R33 \
-  )
-
-enum layer_number {
-  _QWERTY = 0,
-  _LOWER,
-  _RAISE,
-  _ADJUST,
-};
+    L00, L01, L02, L03, L04, L05,           R00, R01, R02, R03, R04, R05, \
+    L10, L11, L12, L13, L14, L15,           R10, R11, R12, R13, R14, R15, \
+    L20, L21, L22, L23, L24, L25,           R20, R21, R22, R23, R24, R25, \
+                   L30, L31, L32, L33, R30, R31, R32, R33 \
+    ) \
+    LAYOUT( \
+        KC_##L00, KC_##L01, KC_##L02, KC_##L03, KC_##L04, KC_##L05,                     KC_##R00, KC_##R01, KC_##R02, KC_##R03, KC_##R04, KC_##R05, \
+        KC_##L10, KC_##L11, KC_##L12, KC_##L13, KC_##L14, KC_##L15,                     KC_##R10, KC_##R11, KC_##R12, KC_##R13, KC_##R14, KC_##R15, \
+        KC_##L20, KC_##L21, KC_##L22, KC_##L23, KC_##L24, KC_##L25,                     KC_##R20, KC_##R21, KC_##R22, KC_##R23, KC_##R24, KC_##R25, \
+                                      KC_##L30, KC_##L31, KC_##L32, KC_##L33, KC_##R30, KC_##R31, KC_##R32, KC_##R33 \
+    )
diff --git a/keyboards/claw44/rev1/rules.mk b/keyboards/claw44/rev1/rules.mk
index 016bc362a1..b1af22c59a 100644
--- a/keyboards/claw44/rev1/rules.mk
+++ b/keyboards/claw44/rev1/rules.mk
@@ -1,7 +1,3 @@
-SRC += rev1/matrix.c
-SRC += rev1/split_util.c
-SRC += rev1/split_scomm.c
-
 # Build Options
 BOOTMAGIC_ENABLE = no       # Virtual DIP switch configuration
 MOUSEKEY_ENABLE = no        # Mouse keys
@@ -10,7 +6,6 @@ CONSOLE_ENABLE = no         # Console for debug
 COMMAND_ENABLE = no         # 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
@@ -20,12 +15,5 @@ SWAP_HANDS_ENABLE = no      # Enable one-hand typing
 # 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 you want to change the display of OLED, you need to change here
-SRC += ./lib/glcdfont.c \
-       ./lib/layer_state_reader.c \
-       ./lib/logo_reader.c \
-       ./lib/keylogger.c \
-       # ./lib/rgb_state_reader.c \
-       # ./lib/mode_icon_reader.c \
-       # ./lib/host_led_state_reader.c \
-       # ./lib/timelogger.c \
+OLED_DRIVER_ENABLE = no     # Add OLED displays support
+SPLIT_KEYBOARD = yes
diff --git a/keyboards/claw44/rev1/serial_config.h b/keyboards/claw44/rev1/serial_config.h
deleted file mode 100644
index 4fab8e8ddf..0000000000
--- a/keyboards/claw44/rev1/serial_config.h
+++ /dev/null
@@ -1,4 +0,0 @@
-#ifndef SOFT_SERIAL_PIN
-#define SOFT_SERIAL_PIN D2
-#define SERIAL_USE_MULTI_TRANSACTION
-#endif
diff --git a/keyboards/claw44/rev1/split_scomm.c b/keyboards/claw44/rev1/split_scomm.c
deleted file mode 100644
index a1fe6ba5b8..0000000000
--- a/keyboards/claw44/rev1/split_scomm.c
+++ /dev/null
@@ -1,91 +0,0 @@
-#ifdef USE_SERIAL
-#ifdef SERIAL_USE_MULTI_TRANSACTION
-/* --- USE flexible API (using multi-type transaction function) --- */
-
-#include <stdbool.h>
-#include <stdint.h>
-#include <stddef.h>
-#include <split_scomm.h>
-#include "serial.h"
-#ifdef CONSOLE_ENABLE
-  #include <print.h>
-#endif
-
-uint8_t volatile serial_slave_buffer[SERIAL_SLAVE_BUFFER_LENGTH] = {0};
-uint8_t volatile serial_master_buffer[SERIAL_MASTER_BUFFER_LENGTH] = {0};
-uint8_t volatile status_com = 0;
-uint8_t volatile status1 = 0;
-uint8_t slave_buffer_change_count = 0;
-uint8_t s_change_old = 0xff;
-uint8_t s_change_new = 0xff;
-
-SSTD_t transactions[] = {
-#define GET_SLAVE_STATUS 0
-    /* master buffer not changed, only recive slave_buffer_change_count */
-    { (uint8_t *)&status_com,
-      0, NULL,
-      sizeof(slave_buffer_change_count), &slave_buffer_change_count,
-    },
-#define PUT_MASTER_GET_SLAVE_STATUS 1
-    /* master buffer changed need send, and recive slave_buffer_change_count  */
-    { (uint8_t *)&status_com,
-      sizeof(serial_master_buffer), (uint8_t *)serial_master_buffer,
-      sizeof(slave_buffer_change_count), &slave_buffer_change_count,
-    },
-#define GET_SLAVE_BUFFER 2
-    /* recive serial_slave_buffer */
-    { (uint8_t *)&status1,
-      0, NULL,
-      sizeof(serial_slave_buffer), (uint8_t *)serial_slave_buffer
-    }
-};
-
-void serial_master_init(void)
-{
-    soft_serial_initiator_init(transactions, TID_LIMIT(transactions));
-}
-
-void serial_slave_init(void)
-{
-    soft_serial_target_init(transactions, TID_LIMIT(transactions));
-}
-
-// 0 => no error
-// 1 => slave did not respond
-// 2 => checksum error
-int serial_update_buffers(int master_update)
-{
-    int status, smatstatus;
-    static int need_retry = 0;
-
-    if( s_change_old != s_change_new ) {
-        smatstatus = soft_serial_transaction(GET_SLAVE_BUFFER);
-        if( smatstatus == TRANSACTION_END ) {
-            s_change_old = s_change_new;
-#ifdef CONSOLE_ENABLE
-            uprintf("slave matrix = %b %b %b %b\n",
-                    serial_slave_buffer[0], serial_slave_buffer[1],
-                    serial_slave_buffer[2], serial_slave_buffer[3]);
-#endif
-        }
-    } else {
-        // serial_slave_buffer dosen't change
-        smatstatus = TRANSACTION_END; // dummy status
-    }
-
-    if( !master_update && !need_retry) {
-        status = soft_serial_transaction(GET_SLAVE_STATUS);
-    } else {
-        status = soft_serial_transaction(PUT_MASTER_GET_SLAVE_STATUS);
-    }
-    if( status == TRANSACTION_END ) {
-        s_change_new = slave_buffer_change_count;
-        need_retry = 0;
-    } else {
-        need_retry = 1;
-    }
-    return smatstatus;
-}
-
-#endif // SERIAL_USE_MULTI_TRANSACTION
-#endif /* USE_SERIAL */
diff --git a/keyboards/claw44/rev1/split_scomm.h b/keyboards/claw44/rev1/split_scomm.h
deleted file mode 100644
index 873d8939d8..0000000000
--- a/keyboards/claw44/rev1/split_scomm.h
+++ /dev/null
@@ -1,24 +0,0 @@
-#ifndef SPLIT_COMM_H
-#define SPLIT_COMM_H
-
-#ifndef SERIAL_USE_MULTI_TRANSACTION
-/* --- USE Simple API (OLD API, compatible with let's split serial.c) --- */
-#include "serial.h"
-
-#else
-/* --- USE flexible API (using multi-type transaction function) --- */
-// Buffers for master - slave communication
-#define SERIAL_SLAVE_BUFFER_LENGTH MATRIX_ROWS/2
-#define SERIAL_MASTER_BUFFER_LENGTH MATRIX_ROWS/2
-
-extern volatile uint8_t serial_slave_buffer[SERIAL_SLAVE_BUFFER_LENGTH];
-extern volatile uint8_t serial_master_buffer[SERIAL_MASTER_BUFFER_LENGTH];
-extern uint8_t slave_buffer_change_count;
-
-void serial_master_init(void);
-void serial_slave_init(void);
-int serial_update_buffers(int master_changed);
-
-#endif
-
-#endif /* SPLIT_COMM_H */
diff --git a/keyboards/claw44/rev1/split_util.c b/keyboards/claw44/rev1/split_util.c
deleted file mode 100644
index e1ff8b4379..0000000000
--- a/keyboards/claw44/rev1/split_util.c
+++ /dev/null
@@ -1,70 +0,0 @@
-#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"
-
-#ifdef USE_MATRIX_I2C
-#  include "i2c.h"
-#else
-#  include "split_scomm.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_MATRIX_I2C
-    i2c_master_init();
-#else
-    serial_master_init();
-#endif
-}
-
-static void keyboard_slave_setup(void) {
-
-#ifdef USE_MATRIX_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();
-}
-
-// this code runs before the usb and keyboard is initialized
-void matrix_setup(void) {
-    split_keyboard_setup();
-}
diff --git a/keyboards/claw44/rev1/split_util.h b/keyboards/claw44/rev1/split_util.h
deleted file mode 100644
index 687ca19bd3..0000000000
--- a/keyboards/claw44/rev1/split_util.h
+++ /dev/null
@@ -1,19 +0,0 @@
-#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 matrix_master_OLED_init (void);
-
-#endif
diff --git a/keyboards/claw44/rules.mk b/keyboards/claw44/rules.mk
index f872b9ebfa..f4d44b23b7 100644
--- a/keyboards/claw44/rules.mk
+++ b/keyboards/claw44/rules.mk
@@ -22,7 +22,6 @@ CONSOLE_ENABLE = no         # Console for debug
 COMMAND_ENABLE = no        # 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
@@ -30,12 +29,4 @@ RGBLIGHT_ENABLE = no       # Enable WS2812 RGB underlight.
 # 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
-SRC += i2c.c
-SRC += serial.c
-SRC += ssd1306.c
-
-# if firmware size over limit, try this option
-# CFLAGS += -flto
-
 DEFAULT_FOLDER = claw44/rev1
diff --git a/keyboards/claw44/serial.c b/keyboards/claw44/serial.c
deleted file mode 100644
index f6293c3dc2..0000000000
--- a/keyboards/claw44/serial.c
+++ /dev/null
@@ -1,589 +0,0 @@
-/*
- * WARNING: be careful changing this code, it is very timing dependent
- *
- * 2018-10-28 checked
- *  avr-gcc 4.9.2
- *  avr-gcc 5.4.0
- *  avr-gcc 7.3.0
- */
-
-#ifndef F_CPU
-#define F_CPU 16000000
-#endif
-
-#include <avr/io.h>
-#include <avr/interrupt.h>
-#include <util/delay.h>
-#include <stddef.h>
-#include <stdbool.h>
-#include "serial.h"
-
-#ifdef SOFT_SERIAL_PIN
-
-#ifdef __AVR_ATmega32U4__
-  // if using ATmega32U4 I2C, can not use PD0 and PD1 in soft serial.
-  #ifdef USE_I2C
-    #if SOFT_SERIAL_PIN == D0 || SOFT_SERIAL_PIN == D1
-      #error Using ATmega32U4 I2C, so can not use PD0, PD1
-    #endif
-  #endif
-
-  #if SOFT_SERIAL_PIN >= D0 && SOFT_SERIAL_PIN <= D3
-    #define SERIAL_PIN_DDR   DDRD
-    #define SERIAL_PIN_PORT  PORTD
-    #define SERIAL_PIN_INPUT PIND
-    #if SOFT_SERIAL_PIN == D0
-      #define SERIAL_PIN_MASK _BV(PD0)
-      #define EIMSK_BIT       _BV(INT0)
-      #define EICRx_BIT       (~(_BV(ISC00) | _BV(ISC01)))
-      #define SERIAL_PIN_INTERRUPT INT0_vect
-    #elif  SOFT_SERIAL_PIN == D1
-      #define SERIAL_PIN_MASK _BV(PD1)
-      #define EIMSK_BIT       _BV(INT1)
-      #define EICRx_BIT       (~(_BV(ISC10) | _BV(ISC11)))
-      #define SERIAL_PIN_INTERRUPT INT1_vect
-    #elif  SOFT_SERIAL_PIN == D2
-      #define SERIAL_PIN_MASK _BV(PD2)
-      #define EIMSK_BIT       _BV(INT2)
-      #define EICRx_BIT       (~(_BV(ISC20) | _BV(ISC21)))
-      #define SERIAL_PIN_INTERRUPT INT2_vect
-    #elif  SOFT_SERIAL_PIN == D3
-      #define SERIAL_PIN_MASK _BV(PD3)
-      #define EIMSK_BIT       _BV(INT3)
-      #define EICRx_BIT       (~(_BV(ISC30) | _BV(ISC31)))
-      #define SERIAL_PIN_INTERRUPT INT3_vect
-    #endif
-  #elif  SOFT_SERIAL_PIN == E6
-    #define SERIAL_PIN_DDR   DDRE
-    #define SERIAL_PIN_PORT  PORTE
-    #define SERIAL_PIN_INPUT PINE
-    #define SERIAL_PIN_MASK  _BV(PE6)
-    #define EIMSK_BIT        _BV(INT6)
-    #define EICRx_BIT        (~(_BV(ISC60) | _BV(ISC61)))
-    #define SERIAL_PIN_INTERRUPT INT6_vect
-  #else
-  #error invalid SOFT_SERIAL_PIN value
-  #endif
-
-#else
- #error serial.c now support ATmega32U4 only
-#endif
-
-//////////////// for backward compatibility ////////////////////////////////
-#ifndef SERIAL_USE_MULTI_TRANSACTION
-/* --- USE Simple API (OLD API, compatible with let's split serial.c) */
-  #if SERIAL_SLAVE_BUFFER_LENGTH > 0
-  uint8_t volatile serial_slave_buffer[SERIAL_SLAVE_BUFFER_LENGTH] = {0};
-  #endif
-  #if SERIAL_MASTER_BUFFER_LENGTH > 0
-  uint8_t volatile serial_master_buffer[SERIAL_MASTER_BUFFER_LENGTH] = {0};
-  #endif
-  uint8_t volatile status0 = 0;
-
-SSTD_t transactions[] = {
-    { (uint8_t *)&status0,
-  #if SERIAL_MASTER_BUFFER_LENGTH > 0
-      sizeof(serial_master_buffer), (uint8_t *)serial_master_buffer,
-  #else
-      0, (uint8_t *)NULL,
-  #endif
-  #if SERIAL_SLAVE_BUFFER_LENGTH > 0
-      sizeof(serial_slave_buffer), (uint8_t *)serial_slave_buffer
-  #else
-      0, (uint8_t *)NULL,
-  #endif
-  }
-};
-
-void serial_master_init(void)
-{ soft_serial_initiator_init(transactions, TID_LIMIT(transactions)); }
-
-void serial_slave_init(void)
-{ soft_serial_target_init(transactions, TID_LIMIT(transactions)); }
-
-// 0 => no error
-// 1 => slave did not respond
-// 2 => checksum error
-int serial_update_buffers()
-{
-    int result;
-    result = soft_serial_transaction();
-    return result;
-}
-
-#endif // end of Simple API (OLD API, compatible with let's split serial.c)
-////////////////////////////////////////////////////////////////////////////
-
-#define ALWAYS_INLINE __attribute__((always_inline))
-#define NO_INLINE __attribute__((noinline))
-#define _delay_sub_us(x)    __builtin_avr_delay_cycles(x)
-
-// parity check
-#define ODD_PARITY 1
-#define EVEN_PARITY 0
-#define PARITY EVEN_PARITY
-
-#ifdef SERIAL_DELAY
-  // custom setup in config.h
-  // #define TID_SEND_ADJUST 2
-  // #define SERIAL_DELAY 6             // micro sec
-  // #define READ_WRITE_START_ADJUST 30 // cycles
-  // #define READ_WRITE_WIDTH_ADJUST 8 // cycles
-#else
-// ============ Standard setups ============
-
-#ifndef SELECT_SOFT_SERIAL_SPEED
-#define SELECT_SOFT_SERIAL_SPEED 1
-//  0: about 189kbps
-//  1: about 137kbps (default)
-//  2: about 75kbps
-//  3: about 39kbps
-//  4: about 26kbps
-//  5: about 20kbps
-#endif
-
-#if __GNUC__ < 6
-  #define TID_SEND_ADJUST 14
-#else
-  #define TID_SEND_ADJUST 2
-#endif
-
-#if SELECT_SOFT_SERIAL_SPEED == 0
-  // Very High speed
-  #define SERIAL_DELAY 4             // micro sec
-  #if __GNUC__ < 6
-    #define READ_WRITE_START_ADJUST 33 // cycles
-    #define READ_WRITE_WIDTH_ADJUST 3 // cycles
-  #else
-    #define READ_WRITE_START_ADJUST 34 // cycles
-    #define READ_WRITE_WIDTH_ADJUST 7 // cycles
-  #endif
-#elif SELECT_SOFT_SERIAL_SPEED == 1
-  // High speed
-  #define SERIAL_DELAY 6             // micro sec
-  #if __GNUC__ < 6
-    #define READ_WRITE_START_ADJUST 30 // cycles
-    #define READ_WRITE_WIDTH_ADJUST 3 // cycles
-  #else
-    #define READ_WRITE_START_ADJUST 33 // cycles
-    #define READ_WRITE_WIDTH_ADJUST 7 // cycles
-  #endif
-#elif SELECT_SOFT_SERIAL_SPEED == 2
-  // Middle speed
-  #define SERIAL_DELAY 12            // micro sec
-  #define READ_WRITE_START_ADJUST 30 // cycles
-  #if __GNUC__ < 6
-    #define READ_WRITE_WIDTH_ADJUST 3 // cycles
-  #else
-    #define READ_WRITE_WIDTH_ADJUST 7 // cycles
-  #endif
-#elif SELECT_SOFT_SERIAL_SPEED == 3
-  // Low speed
-  #define SERIAL_DELAY 24            // micro sec
-  #define READ_WRITE_START_ADJUST 30 // cycles
-  #if __GNUC__ < 6
-    #define READ_WRITE_WIDTH_ADJUST 3 // cycles
-  #else
-    #define READ_WRITE_WIDTH_ADJUST 7 // cycles
-  #endif
-#elif SELECT_SOFT_SERIAL_SPEED == 4
-  // Very Low speed
-  #define SERIAL_DELAY 36            // micro sec
-  #define READ_WRITE_START_ADJUST 30 // cycles
-  #if __GNUC__ < 6
-    #define READ_WRITE_WIDTH_ADJUST 3 // cycles
-  #else
-    #define READ_WRITE_WIDTH_ADJUST 7 // cycles
-  #endif
-#elif SELECT_SOFT_SERIAL_SPEED == 5
-  // Ultra Low speed
-  #define SERIAL_DELAY 48            // micro sec
-  #define READ_WRITE_START_ADJUST 30 // cycles
-  #if __GNUC__ < 6
-    #define READ_WRITE_WIDTH_ADJUST 3 // cycles
-  #else
-    #define READ_WRITE_WIDTH_ADJUST 7 // cycles
-  #endif
-#else
-#error invalid SELECT_SOFT_SERIAL_SPEED value
-#endif /* SELECT_SOFT_SERIAL_SPEED */
-#endif /* SERIAL_DELAY */
-
-#define SERIAL_DELAY_HALF1 (SERIAL_DELAY/2)
-#define SERIAL_DELAY_HALF2 (SERIAL_DELAY - SERIAL_DELAY/2)
-
-#define SLAVE_INT_WIDTH_US 1
-#ifndef SERIAL_USE_MULTI_TRANSACTION
-  #define SLAVE_INT_RESPONSE_TIME SERIAL_DELAY
-#else
-  #define SLAVE_INT_ACK_WIDTH_UNIT 2
-  #define SLAVE_INT_ACK_WIDTH 4
-#endif
-
-static SSTD_t *Transaction_table = NULL;
-static uint8_t Transaction_table_size = 0;
-
-inline static void serial_delay(void) ALWAYS_INLINE;
-inline static
-void serial_delay(void) {
-  _delay_us(SERIAL_DELAY);
-}
-
-inline static void serial_delay_half1(void) ALWAYS_INLINE;
-inline static
-void serial_delay_half1(void) {
-  _delay_us(SERIAL_DELAY_HALF1);
-}
-
-inline static void serial_delay_half2(void) ALWAYS_INLINE;
-inline static
-void serial_delay_half2(void) {
-  _delay_us(SERIAL_DELAY_HALF2);
-}
-
-inline static void serial_output(void) ALWAYS_INLINE;
-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_with_pullup(void) ALWAYS_INLINE;
-inline static
-void serial_input_with_pullup(void) {
-  SERIAL_PIN_DDR  &= ~SERIAL_PIN_MASK;
-  SERIAL_PIN_PORT |= SERIAL_PIN_MASK;
-}
-
-inline static uint8_t serial_read_pin(void) ALWAYS_INLINE;
-inline static
-uint8_t serial_read_pin(void) {
-  return !!(SERIAL_PIN_INPUT & SERIAL_PIN_MASK);
-}
-
-inline static void serial_low(void) ALWAYS_INLINE;
-inline static
-void serial_low(void) {
-  SERIAL_PIN_PORT &= ~SERIAL_PIN_MASK;
-}
-
-inline static void serial_high(void) ALWAYS_INLINE;
-inline static
-void serial_high(void) {
-  SERIAL_PIN_PORT |= SERIAL_PIN_MASK;
-}
-
-void soft_serial_initiator_init(SSTD_t *sstd_table, int sstd_table_size)
-{
-    Transaction_table = sstd_table;
-    Transaction_table_size = (uint8_t)sstd_table_size;
-    serial_output();
-    serial_high();
-}
-
-void soft_serial_target_init(SSTD_t *sstd_table, int sstd_table_size)
-{
-    Transaction_table = sstd_table;
-    Transaction_table_size = (uint8_t)sstd_table_size;
-    serial_input_with_pullup();
-
-    // Enable INT0-INT3,INT6
-    EIMSK |= EIMSK_BIT;
-#if SERIAL_PIN_MASK == _BV(PE6)
-    // Trigger on falling edge of INT6
-    EICRB &= EICRx_BIT;
-#else
-    // Trigger on falling edge of INT0-INT3
-    EICRA &= EICRx_BIT;
-#endif
-}
-
-// Used by the sender to synchronize timing with the reciver.
-static void sync_recv(void) NO_INLINE;
-static
-void sync_recv(void) {
-  for (uint8_t i = 0; i < SERIAL_DELAY*5 && serial_read_pin(); i++ ) {
-  }
-  // This shouldn't hang if the target disconnects because the
-  // serial line will float to high if the target does disconnect.
-  while (!serial_read_pin());
-}
-
-// Used by the reciver to send a synchronization signal to the sender.
-static void sync_send(void) NO_INLINE;
-static
-void sync_send(void) {
-  serial_low();
-  serial_delay();
-  serial_high();
-}
-
-// Reads a byte from the serial line
-static uint8_t serial_read_chunk(uint8_t *pterrcount, uint8_t bit) NO_INLINE;
-static uint8_t serial_read_chunk(uint8_t *pterrcount, uint8_t bit) {
-    uint8_t byte, i, p, pb;
-
-  _delay_sub_us(READ_WRITE_START_ADJUST);
-  for( i = 0, byte = 0, p = PARITY; i < bit; i++ ) {
-      serial_delay_half1();   // read the middle of pulses
-      if( serial_read_pin() ) {
-          byte = (byte << 1) | 1; p ^= 1;
-      } else {
-          byte = (byte << 1) | 0; p ^= 0;
-      }
-      _delay_sub_us(READ_WRITE_WIDTH_ADJUST);
-      serial_delay_half2();
-  }
-  /* recive parity bit */
-  serial_delay_half1();   // read the middle of pulses
-  pb = serial_read_pin();
-  _delay_sub_us(READ_WRITE_WIDTH_ADJUST);
-  serial_delay_half2();
-
-  *pterrcount += (p != pb)? 1 : 0;
-
-  return byte;
-}
-
-// Sends a byte with MSB ordering
-void serial_write_chunk(uint8_t data, uint8_t bit) NO_INLINE;
-void serial_write_chunk(uint8_t data, uint8_t bit) {
-    uint8_t b, p;
-    for( p = PARITY, b = 1<<(bit-1); b ; b >>= 1) {
-        if(data & b) {
-            serial_high(); p ^= 1;
-        } else {
-            serial_low();  p ^= 0;
-        }
-        serial_delay();
-    }
-    /* send parity bit */
-    if(p & 1) { serial_high(); }
-    else      { serial_low(); }
-    serial_delay();
-
-    serial_low(); // sync_send() / senc_recv() need raise edge
-}
-
-static void serial_send_packet(uint8_t *buffer, uint8_t size) NO_INLINE;
-static
-void serial_send_packet(uint8_t *buffer, uint8_t size) {
-  for (uint8_t i = 0; i < size; ++i) {
-    uint8_t data;
-    data = buffer[i];
-    sync_send();
-    serial_write_chunk(data,8);
-  }
-}
-
-static uint8_t serial_recive_packet(uint8_t *buffer, uint8_t size) NO_INLINE;
-static
-uint8_t serial_recive_packet(uint8_t *buffer, uint8_t size) {
-  uint8_t pecount = 0;
-  for (uint8_t i = 0; i < size; ++i) {
-    uint8_t data;
-    sync_recv();
-    data = serial_read_chunk(&pecount, 8);
-    buffer[i] = data;
-  }
-  return pecount == 0;
-}
-
-inline static
-void change_sender2reciver(void) {
-    sync_send();          //0
-    serial_delay_half1(); //1
-    serial_low();         //2
-    serial_input_with_pullup(); //2
-    serial_delay_half1(); //3
-}
-
-inline static
-void change_reciver2sender(void) {
-    sync_recv();     //0
-    serial_delay();  //1
-    serial_low();    //3
-    serial_output(); //3
-    serial_delay_half1(); //4
-}
-
-static inline uint8_t nibble_bits_count(uint8_t bits)
-{
-    bits = (bits & 0x5) + (bits >> 1 & 0x5);
-    bits = (bits & 0x3) + (bits >> 2 & 0x3);
-    return bits;
-}
-
-// interrupt handle to be used by the target device
-ISR(SERIAL_PIN_INTERRUPT) {
-
-#ifndef SERIAL_USE_MULTI_TRANSACTION
-  serial_low();
-  serial_output();
-  SSTD_t *trans = Transaction_table;
-#else
-  // recive transaction table index
-  uint8_t tid, bits;
-  uint8_t pecount = 0;
-  sync_recv();
-  bits = serial_read_chunk(&pecount,7);
-  tid = bits>>3;
-  bits = (bits&7) != nibble_bits_count(tid);
-  if( bits || pecount> 0 || tid > Transaction_table_size ) {
-      return;
-  }
-  serial_delay_half1();
-
-  serial_high(); // response step1 low->high
-  serial_output();
-  _delay_sub_us(SLAVE_INT_ACK_WIDTH_UNIT*SLAVE_INT_ACK_WIDTH);
-  SSTD_t *trans = &Transaction_table[tid];
-  serial_low(); // response step2 ack high->low
-#endif
-
-  // target send phase
-  if( trans->target2initiator_buffer_size > 0 )
-      serial_send_packet((uint8_t *)trans->target2initiator_buffer,
-                         trans->target2initiator_buffer_size);
-  // target switch to input
-  change_sender2reciver();
-
-  // target recive phase
-  if( trans->initiator2target_buffer_size > 0 ) {
-      if (serial_recive_packet((uint8_t *)trans->initiator2target_buffer,
-                               trans->initiator2target_buffer_size) ) {
-          *trans->status = TRANSACTION_ACCEPTED;
-      } else {
-          *trans->status = TRANSACTION_DATA_ERROR;
-      }
-  } else {
-      *trans->status = TRANSACTION_ACCEPTED;
-  }
-
-  sync_recv(); //weit initiator output to high
-}
-
-/////////
-//  start transaction by initiator
-//
-// int  soft_serial_transaction(int sstd_index)
-//
-// Returns:
-//    TRANSACTION_END
-//    TRANSACTION_NO_RESPONSE
-//    TRANSACTION_DATA_ERROR
-// this code is very time dependent, so we need to disable interrupts
-#ifndef SERIAL_USE_MULTI_TRANSACTION
-int  soft_serial_transaction(void) {
-  SSTD_t *trans = Transaction_table;
-#else
-int  soft_serial_transaction(int sstd_index) {
-  if( sstd_index > Transaction_table_size )
-      return TRANSACTION_TYPE_ERROR;
-  SSTD_t *trans = &Transaction_table[sstd_index];
-#endif
-  cli();
-
-  // signal to the target that we want to start a transaction
-  serial_output();
-  serial_low();
-  _delay_us(SLAVE_INT_WIDTH_US);
-
-#ifndef SERIAL_USE_MULTI_TRANSACTION
-  // wait for the target response
-  serial_input_with_pullup();
-  _delay_us(SLAVE_INT_RESPONSE_TIME);
-
-  // check if the target is present
-  if (serial_read_pin()) {
-    // target failed to pull the line low, assume not present
-    serial_output();
-    serial_high();
-    *trans->status = TRANSACTION_NO_RESPONSE;
-    sei();
-    return TRANSACTION_NO_RESPONSE;
-  }
-
-#else
-  // send transaction table index
-  int tid = (sstd_index<<3) | (7 & nibble_bits_count(sstd_index));
-  sync_send();
-  _delay_sub_us(TID_SEND_ADJUST);
-  serial_write_chunk(tid, 7);
-  serial_delay_half1();
-
-  // wait for the target response (step1 low->high)
-  serial_input_with_pullup();
-  while( !serial_read_pin() ) {
-      _delay_sub_us(2);
-  }
-
-  // check if the target is present (step2 high->low)
-  for( int i = 0; serial_read_pin(); i++ ) {
-      if (i > SLAVE_INT_ACK_WIDTH + 1) {
-          // slave failed to pull the line low, assume not present
-          serial_output();
-          serial_high();
-          *trans->status = TRANSACTION_NO_RESPONSE;
-          sei();
-          return TRANSACTION_NO_RESPONSE;
-      }
-      _delay_sub_us(SLAVE_INT_ACK_WIDTH_UNIT);
-  }
-#endif
-
-  // initiator recive phase
-  // if the target is present syncronize with it
-  if( trans->target2initiator_buffer_size > 0 ) {
-      if (!serial_recive_packet((uint8_t *)trans->target2initiator_buffer,
-                                trans->target2initiator_buffer_size) ) {
-          serial_output();
-          serial_high();
-          *trans->status = TRANSACTION_DATA_ERROR;
-          sei();
-          return TRANSACTION_DATA_ERROR;
-      }
-   }
-
-  // initiator switch to output
-  change_reciver2sender();
-
-  // initiator send phase
-  if( trans->initiator2target_buffer_size > 0 ) {
-      serial_send_packet((uint8_t *)trans->initiator2target_buffer,
-                         trans->initiator2target_buffer_size);
-  }
-
-  // always, release the line when not in use
-  sync_send();
-
-  *trans->status = TRANSACTION_END;
-  sei();
-  return TRANSACTION_END;
-}
-
-#ifdef SERIAL_USE_MULTI_TRANSACTION
-int soft_serial_get_and_clean_status(int sstd_index) {
-    SSTD_t *trans = &Transaction_table[sstd_index];
-    cli();
-    int retval = *trans->status;
-    *trans->status = 0;;
-    sei();
-    return retval;
-}
-#endif
-
-#endif
-
-// Helix serial.c history
-//   2018-1-29 fork from let's split and add PD2, modify sync_recv() (#2308, bceffdefc)
-//   2018-6-28 bug fix master to slave comm and speed up (#3255, 1038bbef4)
-//             (adjusted with avr-gcc 4.9.2)
-//   2018-7-13 remove USE_SERIAL_PD2 macro (#3374, f30d6dd78)
-//             (adjusted with avr-gcc 4.9.2)
-//   2018-8-11 add support multi-type transaction (#3608, feb5e4aae)
-//             (adjusted with avr-gcc 4.9.2)
-//   2018-10-21 fix serial and RGB animation conflict (#4191, 4665e4fff)
-//             (adjusted with avr-gcc 7.3.0)
-//   2018-10-28 re-adjust compiler depend value of delay (#4269, 8517f8a66)
-//             (adjusted with avr-gcc 5.4.0, 7.3.0)
diff --git a/keyboards/claw44/serial.h b/keyboards/claw44/serial.h
deleted file mode 100644
index 7e0c0847a4..0000000000
--- a/keyboards/claw44/serial.h
+++ /dev/null
@@ -1,84 +0,0 @@
-#ifndef SOFT_SERIAL_H
-#define SOFT_SERIAL_H
-
-#include <stdbool.h>
-
-// /////////////////////////////////////////////////////////////////
-// Need Soft Serial defines in config.h
-// /////////////////////////////////////////////////////////////////
-// ex.
-//  #define SOFT_SERIAL_PIN ??   // ?? = D0,D1,D2,D3,E6
-//  OPTIONAL: #define SELECT_SOFT_SERIAL_SPEED ? // ? = 1,2,3,4,5
-//                                               //  1: about 137kbps (default)
-//                                               //  2: about 75kbps
-//                                               //  3: about 39kbps
-//                                               //  4: about 26kbps
-//                                               //  5: about 20kbps
-//
-// //// USE Simple API (OLD API, compatible with let's split serial.c)
-// ex.
-//  #define SERIAL_SLAVE_BUFFER_LENGTH MATRIX_ROWS/2
-//  #define SERIAL_MASTER_BUFFER_LENGTH 1
-//
-// //// USE flexible API (using multi-type transaction function)
-//  #define SERIAL_USE_MULTI_TRANSACTION
-//
-// /////////////////////////////////////////////////////////////////
-
-
-#ifndef SERIAL_USE_MULTI_TRANSACTION
-/* --- USE Simple API (OLD API, compatible with let's split serial.c) */
-#if SERIAL_SLAVE_BUFFER_LENGTH > 0
-extern volatile uint8_t serial_slave_buffer[SERIAL_SLAVE_BUFFER_LENGTH];
-#endif
-#if SERIAL_MASTER_BUFFER_LENGTH > 0
-extern volatile uint8_t serial_master_buffer[SERIAL_MASTER_BUFFER_LENGTH];
-#endif
-
-void serial_master_init(void);
-void serial_slave_init(void);
-int serial_update_buffers(void);
-
-#endif // USE Simple API
-
-// Soft Serial Transaction Descriptor
-typedef struct _SSTD_t  {
-    uint8_t *status;
-    uint8_t initiator2target_buffer_size;
-    uint8_t *initiator2target_buffer;
-    uint8_t target2initiator_buffer_size;
-    uint8_t *target2initiator_buffer;
-} SSTD_t;
-#define TID_LIMIT( table ) (sizeof(table) / sizeof(SSTD_t))
-
-// initiator is transaction start side
-void soft_serial_initiator_init(SSTD_t *sstd_table, int sstd_table_size);
-// target is interrupt accept side
-void soft_serial_target_init(SSTD_t *sstd_table, int sstd_table_size);
-
-// initiator resullt
-#define TRANSACTION_END 0
-#define TRANSACTION_NO_RESPONSE 0x1
-#define TRANSACTION_DATA_ERROR  0x2
-#define TRANSACTION_TYPE_ERROR  0x4
-#ifndef SERIAL_USE_MULTI_TRANSACTION
-int  soft_serial_transaction(void);
-#else
-int  soft_serial_transaction(int sstd_index);
-#endif
-
-// target status
-// *SSTD_t.status has
-//   initiator:
-//       TRANSACTION_END
-//    or TRANSACTION_NO_RESPONSE
-//    or TRANSACTION_DATA_ERROR
-//   target:
-//       TRANSACTION_DATA_ERROR
-//    or TRANSACTION_ACCEPTED
-#define TRANSACTION_ACCEPTED 0x8
-#ifdef SERIAL_USE_MULTI_TRANSACTION
-int  soft_serial_get_and_clean_status(int sstd_index);
-#endif
-
-#endif /* SOFT_SERIAL_H */
diff --git a/keyboards/claw44/ssd1306.c b/keyboards/claw44/ssd1306.c
deleted file mode 100644
index 7dea1cc176..0000000000
--- a/keyboards/claw44/ssd1306.c
+++ /dev/null
@@ -1,345 +0,0 @@
-#ifdef SSD1306OLED
-
-#include "ssd1306.h"
-#include "i2c.h"
-#include <string.h>
-#include "print.h"
-#ifdef PROTOCOL_LUFA
-#include "lufa.h"
-#endif
-#include "sendchar.h"
-#include "timer.h"
-
-struct CharacterMatrix display;
-
-extern const unsigned char font[] PROGMEM;
-
-// Set this to 1 to help diagnose early startup problems
-// when testing power-on with ble.  Turn it off otherwise,
-// as the latency of printing most of the debug info messes
-// with the matrix scan, causing keys to drop.
-#define DEBUG_TO_SCREEN 0
-
-//static uint16_t last_battery_update;
-//static uint32_t vbat;
-//#define BatteryUpdateInterval 10000 /* milliseconds */
-
-// 'last_flush' is declared as uint16_t,
-// so this must be less than 65535 
-#define ScreenOffInterval 60000 /* milliseconds */
-#if DEBUG_TO_SCREEN
-static uint8_t displaying;
-#endif
-static uint16_t last_flush;
-
-static bool force_dirty = true;
-
-// Write command sequence.
-// Returns true on success.
-static inline bool _send_cmd1(uint8_t cmd) {
-  bool res = false;
-
-  if (i2c_start_write(SSD1306_ADDRESS)) {
-    xprintf("failed to start write to %d\n", SSD1306_ADDRESS);
-    goto done;
-  }
-
-  if (i2c_master_write(0x0 /* command byte follows */)) {
-    print("failed to write control byte\n");
-
-    goto done;
-  }
-
-  if (i2c_master_write(cmd)) {
-    xprintf("failed to write command %d\n", cmd);
-    goto done;
-  }
-  res = true;
-done:
-  i2c_master_stop();
-  return res;
-}
-
-// Write 2-byte command sequence.
-// Returns true on success
-static inline bool _send_cmd2(uint8_t cmd, uint8_t opr) {
-  if (!_send_cmd1(cmd)) {
-    return false;
-  }
-  return _send_cmd1(opr);
-}
-
-// Write 3-byte command sequence.
-// Returns true on success
-static inline bool _send_cmd3(uint8_t cmd, uint8_t opr1, uint8_t opr2) {
-  if (!_send_cmd1(cmd)) {
-    return false;
-  }
-  if (!_send_cmd1(opr1)) {
-    return false;
-  }
-  return _send_cmd1(opr2);
-}
-
-#define send_cmd1(c) if (!_send_cmd1(c)) {goto done;}
-#define send_cmd2(c,o) if (!_send_cmd2(c,o)) {goto done;}
-#define send_cmd3(c,o1,o2) if (!_send_cmd3(c,o1,o2)) {goto done;}
-
-static void clear_display(void) {
-  matrix_clear(&display);
-
-  // Clear all of the display bits (there can be random noise
-  // in the RAM on startup)
-  send_cmd3(PageAddr, 0, (DisplayHeight / 8) - 1);
-  send_cmd3(ColumnAddr, 0, DisplayWidth - 1);
-
-  if (i2c_start_write(SSD1306_ADDRESS)) {
-    goto done;
-  }
-  if (i2c_master_write(0x40)) {
-    // Data mode
-    goto done;
-  }
-  for (uint8_t row = 0; row < MatrixRows; ++row) {
-    for (uint8_t col = 0; col < DisplayWidth; ++col) {
-      i2c_master_write(0);
-    }
-  }
-
-  display.dirty = false;
-
-done:
-  i2c_master_stop();
-}
-
-#if DEBUG_TO_SCREEN
-#undef sendchar
-static int8_t capture_sendchar(uint8_t c) {
-  sendchar(c);
-  iota_gfx_write_char(c);
-
-  if (!displaying) {
-    iota_gfx_flush();
-  }
-  return 0;
-}
-#endif
-
-bool iota_gfx_init(bool rotate) {
-  bool success = false;
-
-  i2c_master_init();
-  send_cmd1(DisplayOff);
-  send_cmd2(SetDisplayClockDiv, 0x80);
-  send_cmd2(SetMultiPlex, DisplayHeight - 1);
-
-  send_cmd2(SetDisplayOffset, 0);
-
-
-  send_cmd1(SetStartLine | 0x0);
-  send_cmd2(SetChargePump, 0x14 /* Enable */);
-  send_cmd2(SetMemoryMode, 0 /* horizontal addressing */);
-
-  if(rotate){
-    // the following Flip the display orientation 180 degrees
-    send_cmd1(SegRemap);
-    send_cmd1(ComScanInc);
-  }else{
-    // Flips the display orientation 0 degrees
-    send_cmd1(SegRemap | 0x1);
-    send_cmd1(ComScanDec);
-  }
-
-  send_cmd2(SetComPins, 0x2);
-  send_cmd2(SetContrast, 0x8f);
-  send_cmd2(SetPreCharge, 0xf1);
-  send_cmd2(SetVComDetect, 0x40);
-  send_cmd1(DisplayAllOnResume);
-  send_cmd1(NormalDisplay);
-  send_cmd1(DeActivateScroll);
-  send_cmd1(DisplayOn);
-
-  send_cmd2(SetContrast, 0); // Dim
-
-  clear_display();
-
-  success = true;
-
-  iota_gfx_flush();
-
-#if DEBUG_TO_SCREEN
-  print_set_sendchar(capture_sendchar);
-#endif
-
-done:
-  return success;
-}
-
-bool iota_gfx_off(void) {
-  bool success = false;
-
-  send_cmd1(DisplayOff);
-  success = true;
-
-done:
-  return success;
-}
-
-bool iota_gfx_on(void) {
-  bool success = false;
-
-  send_cmd1(DisplayOn);
-  success = true;
-
-done:
-  return success;
-}
-
-void matrix_write_char_inner(struct CharacterMatrix *matrix, uint8_t c) {
-  *matrix->cursor = c;
-  ++matrix->cursor;
-
-  if (matrix->cursor - &matrix->display[0][0] == sizeof(matrix->display)) {
-    // We went off the end; scroll the display upwards by one line
-    memmove(&matrix->display[0], &matrix->display[1],
-            MatrixCols * (MatrixRows - 1));
-    matrix->cursor = &matrix->display[MatrixRows - 1][0];
-    memset(matrix->cursor, ' ', MatrixCols);
-  }
-}
-
-void matrix_write_char(struct CharacterMatrix *matrix, uint8_t c) {
-  matrix->dirty = true;
-
-  if (c == '\n') {
-    // Clear to end of line from the cursor and then move to the
-    // start of the next line
-    uint8_t cursor_col = (matrix->cursor - &matrix->display[0][0]) % MatrixCols;
-
-    while (cursor_col++ < MatrixCols) {
-      matrix_write_char_inner(matrix, ' ');
-    }
-    return;
-  }
-
-  matrix_write_char_inner(matrix, c);
-}
-
-void iota_gfx_write_char(uint8_t c) {
-  matrix_write_char(&display, c);
-}
-
-void matrix_write(struct CharacterMatrix *matrix, const char *data) {
-  const char *end = data + strlen(data);
-  while (data < end) {
-    matrix_write_char(matrix, *data);
-    ++data;
-  }
-}
-
-void matrix_write_ln(struct CharacterMatrix *matrix, const char *data) {
-  char data_ln[strlen(data)+2];
-  snprintf(data_ln, sizeof(data_ln), "%s\n", data);
-  matrix_write(matrix, data_ln);
-}
-
-void iota_gfx_write(const char *data) {
-  matrix_write(&display, data);
-}
-
-void matrix_write_P(struct CharacterMatrix *matrix, const char *data) {
-  while (true) {
-    uint8_t c = pgm_read_byte(data);
-    if (c == 0) {
-      return;
-    }
-    matrix_write_char(matrix, c);
-    ++data;
-  }
-}
-
-void iota_gfx_write_P(const char *data) {
-  matrix_write_P(&display, data);
-}
-
-void matrix_clear(struct CharacterMatrix *matrix) {
-  memset(matrix->display, ' ', sizeof(matrix->display));
-  matrix->cursor = &matrix->display[0][0];
-  matrix->dirty = true;
-}
-
-void iota_gfx_clear_screen(void) {
-  matrix_clear(&display);
-}
-
-void matrix_render(struct CharacterMatrix *matrix) {
-  last_flush = timer_read();
-  iota_gfx_on();
-#if DEBUG_TO_SCREEN
-  ++displaying;
-#endif
-
-  // Move to the home position
-  send_cmd3(PageAddr, 0, MatrixRows - 1);
-  send_cmd3(ColumnAddr, 0, (MatrixCols * FontWidth) - 1);
-
-  if (i2c_start_write(SSD1306_ADDRESS)) {
-    goto done;
-  }
-  if (i2c_master_write(0x40)) {
-    // Data mode
-    goto done;
-  }
-
-  for (uint8_t row = 0; row < MatrixRows; ++row) {
-    for (uint8_t col = 0; col < MatrixCols; ++col) {
-      const uint8_t *glyph = font + (matrix->display[row][col] * FontWidth);
-
-      for (uint8_t glyphCol = 0; glyphCol < FontWidth; ++glyphCol) {
-        uint8_t colBits = pgm_read_byte(glyph + glyphCol);
-        i2c_master_write(colBits);
-      }
-
-      // 1 column of space between chars (it's not included in the glyph)
-      //i2c_master_write(0);
-    }
-  }
-
-  matrix->dirty = false;
-
-done:
-  i2c_master_stop();
-#if DEBUG_TO_SCREEN
-  --displaying;
-#endif
-}
-
-void iota_gfx_flush(void) {
-  matrix_render(&display);
-}
-
-__attribute__ ((weak))
-void iota_gfx_task_user(void) {
-}
-
-void iota_gfx_task(void) {
-  iota_gfx_task_user();
-
-  if (display.dirty|| force_dirty) {
-    iota_gfx_flush();
-    force_dirty = false;
-  }
-
-  /*
-  if (timer_elapsed(last_flush) > ScreenOffInterval) {
-    iota_gfx_off();
-  }
-  */
-}
-
-bool process_record_gfx(uint16_t keycode, keyrecord_t *record) {
-  force_dirty = true;
-  return true;
-}
-
-#endif
diff --git a/keyboards/claw44/ssd1306.h b/keyboards/claw44/ssd1306.h
deleted file mode 100644
index 11a3cc67f4..0000000000
--- a/keyboards/claw44/ssd1306.h
+++ /dev/null
@@ -1,90 +0,0 @@
-#pragma once
-
-#include <stdbool.h>
-#include <stdio.h>
-#include "action.h"
-
-enum ssd1306_cmds {
-  DisplayOff = 0xAE,
-  DisplayOn = 0xAF,
-
-  SetContrast = 0x81,
-  DisplayAllOnResume = 0xA4,
-
-  DisplayAllOn = 0xA5,
-  NormalDisplay = 0xA6,
-  InvertDisplay = 0xA7,
-  SetDisplayOffset = 0xD3,
-  SetComPins = 0xda,
-  SetVComDetect = 0xdb,
-  SetDisplayClockDiv = 0xD5,
-  SetPreCharge = 0xd9,
-  SetMultiPlex = 0xa8,
-  SetLowColumn = 0x00,
-  SetHighColumn = 0x10,
-  SetStartLine = 0x40,
-
-  SetMemoryMode = 0x20,
-  ColumnAddr = 0x21,
-  PageAddr = 0x22,
-
-  ComScanInc = 0xc0,
-  ComScanDec = 0xc8,
-  SegRemap = 0xa0,
-  SetChargePump = 0x8d,
-  ExternalVcc = 0x01,
-  SwitchCapVcc = 0x02,
-
-  ActivateScroll = 0x2f,
-  DeActivateScroll = 0x2e,
-  SetVerticalScrollArea = 0xa3,
-  RightHorizontalScroll = 0x26,
-  LeftHorizontalScroll = 0x27,
-  VerticalAndRightHorizontalScroll = 0x29,
-  VerticalAndLeftHorizontalScroll = 0x2a,
-};
-
-// Controls the SSD1306 128x32 OLED display via i2c
-
-#ifndef SSD1306_ADDRESS
-#define SSD1306_ADDRESS 0x3C
-#endif
-
-#define DisplayHeight 32
-#define DisplayWidth 128
-
-#define FontHeight 8
-#define FontWidth 6
-
-#define MatrixRows (DisplayHeight / FontHeight)
-#define MatrixCols (DisplayWidth / FontWidth)
-
-struct CharacterMatrix {
-  uint8_t display[MatrixRows][MatrixCols];
-  uint8_t *cursor;
-  bool dirty;
-};
-
-extern struct CharacterMatrix display;
-
-bool iota_gfx_init(bool rotate);
-void iota_gfx_task(void);
-bool iota_gfx_off(void);
-bool iota_gfx_on(void);
-void iota_gfx_flush(void);
-void iota_gfx_write_char(uint8_t c);
-void iota_gfx_write(const char *data);
-void iota_gfx_write_P(const char *data);
-void iota_gfx_clear_screen(void);
-
-void iota_gfx_task_user(void);
-
-void matrix_clear(struct CharacterMatrix *matrix);
-void matrix_write_char_inner(struct CharacterMatrix *matrix, uint8_t c);
-void matrix_write_char(struct CharacterMatrix *matrix, uint8_t c);
-void matrix_write(struct CharacterMatrix *matrix, const char *data);
-void matrix_write_ln(struct CharacterMatrix *matrix, const char *data);
-void matrix_write_P(struct CharacterMatrix *matrix, const char *data);
-void matrix_render(struct CharacterMatrix *matrix);
-
-bool process_record_gfx(uint16_t keycode, keyrecord_t *record);