refactor SPLIT_KEYBOARD, OLED_DRIVER_ENABLE (#10405)

10 files changed, 40 insertions, 648 deletions

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