[Keyboard] add claw44 keyboard (#5511)

* add claw44 keyboard

* Update keyboards/claw44/lib/layer_state_reader.c

Co-Authored-By: yfuku <30647434+yfuku@users.noreply.github.com>

* Update keyboards/claw44/lib/layer_state_reader.c

Co-Authored-By: yfuku <30647434+yfuku@users.noreply.github.com>

* Update keyboards/claw44/lib/layer_state_reader.c

Co-Authored-By: yfuku <30647434+yfuku@users.noreply.github.com>

* Update keyboards/claw44/lib/layer_state_reader.c

Co-Authored-By: yfuku <30647434+yfuku@users.noreply.github.com>

* Update keyboards/claw44/readme.md

Co-Authored-By: yfuku <30647434+yfuku@users.noreply.github.com>

* Remove unnecessary code because of default value

* Move layer definition

* Update keyboards/claw44/keymaps/default/keymap.c

Co-Authored-By: yfuku <30647434+yfuku@users.noreply.github.com>

* Update keyboards/claw44/keymaps/yfuku/keymap.c

Co-Authored-By: yfuku <30647434+yfuku@users.noreply.github.com>

* Update keyboards/claw44/readme.md

Co-Authored-By: yfuku <30647434+yfuku@users.noreply.github.com>

* default keymap. LAYOUT_kc -> LAYOUT macro

* Move rules.mk from keymaps to keyboard level.

* add Hardware Supported, Hardware Availability

* Update keyboards/claw44/keymaps/default/keymap.c

Co-Authored-By: yfuku <30647434+yfuku@users.noreply.github.com>

* Update keyboards/claw44/keymaps/yfuku/keymap.c

Co-Authored-By: yfuku <30647434+yfuku@users.noreply.github.com>

* Remove depreciated function

33 files changed, 3044 insertions, 0 deletions

diff --git a/keyboards/claw44/claw44.c b/keyboards/claw44/claw44.c
new file mode 100644
index 0000000000..f564fb623b
--- /dev/null
+++ b/keyboards/claw44/claw44.c
@@ -0,0 +1,10 @@
+#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/claw44.h b/keyboards/claw44/claw44.h
new file mode 100644
index 0000000000..4ca25fcb2b
--- /dev/null
+++ b/keyboards/claw44/claw44.h
@@ -0,0 +1,5 @@
+#pragma once
+
+#ifdef KEYBOARD_claw44_rev1
+  #include "rev1.h"
+#endif
diff --git a/keyboards/claw44/config.h b/keyboards/claw44/config.h
new file mode 100644
index 0000000000..fb1cdf3962
--- /dev/null
+++ b/keyboards/claw44/config.h
@@ -0,0 +1,28 @@
+/*
+Copyright 2012 Jun Wako <wakojun@gmail.com>
+Copyright 2015 Jack Humbert
+
+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/>.
+*/
+
+#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
new file mode 100644
index 0000000000..4bee5c6398
--- /dev/null
+++ b/keyboards/claw44/i2c.c
@@ -0,0 +1,162 @@
+#include <util/twi.h>
+#include <avr/io.h>
+#include <stdlib.h>
+#include <avr/interrupt.h>
+#include <util/twi.h>
+#include <stdbool.h>
+#include "i2c.h"
+
+#ifdef USE_I2C
+
+// Limits the amount of we wait for any one i2c transaction.
+// Since were running SCL line 100kHz (=> 10μs/bit), and each transactions is
+// 9 bits, a single transaction will take around 90μs to complete.
+//
+// (F_CPU/SCL_CLOCK)  =>  # of μC cycles to transfer a bit
+// poll loop takes at least 8 clock cycles to execute
+#define I2C_LOOP_TIMEOUT (9+1)*(F_CPU/SCL_CLOCK)/8
+
+#define BUFFER_POS_INC() (slave_buffer_pos = (slave_buffer_pos+1)%SLAVE_BUFFER_SIZE)
+
+volatile uint8_t i2c_slave_buffer[SLAVE_BUFFER_SIZE];
+
+static volatile uint8_t slave_buffer_pos;
+static volatile bool slave_has_register_set = false;
+
+// Wait for an i2c operation to finish
+inline static
+void i2c_delay(void) {
+  uint16_t lim = 0;
+  while(!(TWCR & (1<<TWINT)) && lim < I2C_LOOP_TIMEOUT)
+    lim++;
+
+  // easier way, but will wait slightly longer
+  // _delay_us(100);
+}
+
+// Setup twi to run at 100kHz 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
new file mode 100644
index 0000000000..710662c7ab
--- /dev/null
+++ b/keyboards/claw44/i2c.h
@@ -0,0 +1,46 @@
+#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
new file mode 100644
index 0000000000..eff6ad3c7b
--- /dev/null
+++ b/keyboards/claw44/keymaps/default/config.h
@@ -0,0 +1,35 @@
+/*
+This is the c configuration file for the keymap
+
+Copyright 2012 Jun Wako <wakojun@gmail.com>
+Copyright 2015 Jack Humbert
+
+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/>.
+*/
+
+#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
new file mode 100644
index 0000000000..c346571255
--- /dev/null
+++ b/keyboards/claw44/keymaps/default/keymap.c
@@ -0,0 +1,169 @@
+#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,
+};
+
+#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  , _______, _______, _______,     _______, _______, _______, _______
+  //                  `--------+--------+--------+--------'   `--------+--------+--------+--------'
+  ),
+};
+
+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/yfuku/config.h
new file mode 100644
index 0000000000..244ffa7096
--- /dev/null
+++ b/keyboards/claw44/keymaps/yfuku/config.h
@@ -0,0 +1,36 @@
+/*
+This is the c configuration file for the keymap
+
+Copyright 2012 Jun Wako <wakojun@gmail.com>
+Copyright 2015 Jack Humbert
+
+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/>.
+*/
+
+#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
diff --git a/keyboards/claw44/keymaps/yfuku/keymap.c b/keyboards/claw44/keymaps/yfuku/keymap.c
new file mode 100644
index 0000000000..77d459b928
--- /dev/null
+++ b/keyboards/claw44/keymaps/yfuku/keymap.c
@@ -0,0 +1,221 @@
+#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
new file mode 100644
index 0000000000..91f53d9c24
--- /dev/null
+++ b/keyboards/claw44/lib/glcdfont.c
@@ -0,0 +1,243 @@
+// This is the 'classic' fixed-space bitmap font for Adafruit_GFX since 1.0.
+// See gfxfont.h for newer custom bitmap font info.
+
+#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 = {
+0x00, 0x00, 0x00, 0x00, 0x00, 0x00,
+0x3E, 0x5B, 0x4F, 0x5B, 0x3E, 0x00,
+0x3E, 0x6B, 0x4F, 0x6B, 0x3E, 0x00,
+0x1C, 0x3E, 0x7C, 0x3E, 0x1C, 0x00,
+0x18, 0x3C, 0x7E, 0x3C, 0x18, 0x00,
+0x1C, 0x57, 0x7D, 0x57, 0x1C, 0x00,
+0x1C, 0x5E, 0x7F, 0x5E, 0x1C, 0x00,
+0x00, 0x18, 0x3C, 0x18, 0x00, 0x00,
+0xFF, 0xE7, 0xC3, 0xE7, 0xFF, 0x00,
+0x00, 0x18, 0x24, 0x18, 0x00, 0x00,
+0xFF, 0xE7, 0xDB, 0xE7, 0xFF, 0x00,
+0x30, 0x48, 0x3A, 0x06, 0x0E, 0x00,
+0x26, 0x29, 0x79, 0x29, 0x26, 0x00,
+0x40, 0x7F, 0x05, 0x05, 0x07, 0x00,
+0x40, 0x7F, 0x05, 0x25, 0x3F, 0x00,
+0x5A, 0x3C, 0xE7, 0x3C, 0x5A, 0x00,
+0x7F, 0x3E, 0x1C, 0x1C, 0x08, 0x00,