2020 May 30 Breaking Changes Update (#9215)

* Branch point for 2020 May 30 Breaking Change

* Migrate `ACTION_LAYER_TOGGLE` to `TG()` (#8954)

* Migrate `ACTION_MODS_ONESHOT` to `OSM()` (#8957)

* Migrate `ACTION_DEFAULT_LAYER_SET` to `DF()` (#8958)

* Migrate `ACTION_LAYER_MODS` to `LM()` (#8959)

* Migrate `ACTION_MODS_TAP_KEY` to `MT()` (#8968)

* Convert V-USB usbdrv to a submodule (#8321)

* Unify Tap Hold functions and documentation (#8348)

* Changing board names to prevent confusion (#8412)

* Move the Keyboardio Model01 to a keyboardio/ subdir (#8499)

* Move spaceman keyboards (#8830)

* Migrate miscellaneous `fn_actions` entries (#8977)

* Migrate `ACTION_MODS_KEY` to chained mod keycodes (#8979)

* Organizing my keyboards (plaid, tartan, ergoinu) (#8537)

* Refactor Lily58 to use split_common (#6260)

* Refactor zinc to use split_common (#7114)

* Add a message if bin/qmk doesn't work (#9000)

* Fix conflicting types for 'tfp_printf' (#8269)

* Fixed RGB_DISABLE_AFTER_TIMEOUT to be seconds based & small internals cleanup (#6480)

* Refactor and updates to TKC1800 code (#8472)

* Switch to qmk forks for everything (#9019)

* audio refactor: replace deprecated PLAY_NOTE_ARRAY (#8484)

* Audio enable corrections (2/3) (#8903)

* Split HHKB to ANSI and JP layouts and Add VIA support for each (#8582)

* Audio enable corrections (Part 4) (#8974)

* Fix typo from PR7114 (#9171)

* Augment future branch Changelogs (#8978)

* Revert "Branch point for 2020 May 30 Breaking Change"

14 files changed, 136 insertions, 683 deletions

diff --git a/keyboards/tkc1800/config.h b/keyboards/tkc1800/config.h
index 5ba40bb35c..9c35699c92 100644
--- a/keyboards/tkc1800/config.h
+++ b/keyboards/tkc1800/config.h
@@ -67,6 +67,11 @@ along with this program.  If not, see <http://www.gnu.org/licenses/>.
 /* Locking resynchronize hack */
 #define LOCKING_RESYNC_ENABLE
 
+#define QMK_ESC_OUTPUT A0 // usually COL
+#define QMK_ESC_INPUT F4 // usually ROW
+#define QMK_LED D2 // NumLock on TKC1800
+//#define QMK_SPEAKER C6
+
 /*
  * Force NKRO
  *
diff --git a/keyboards/tkc1800/i2c.c b/keyboards/tkc1800/i2c.c
deleted file mode 100644
index cd2b835d50..0000000000
--- a/keyboards/tkc1800/i2c.c
+++ /dev/null
@@ -1,166 +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
-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<<TWSTA) | (1<<TWEN);
-
-  i2c_delay();
-
-  // check that we started successfully
-  if ( (TW_STATUS != TW_START) && (TW_STATUS != TW_REP_START))
-    return 1;
-
-  // send device address
-  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/tkc1800/i2c.h b/keyboards/tkc1800/i2c.h
deleted file mode 100644
index 2bd7f40968..0000000000
--- a/keyboards/tkc1800/i2c.h
+++ /dev/null
@@ -1,49 +0,0 @@
-#ifndef I2C_H
-#define I2C_H
-
-#include <stdint.h>
-
-#ifndef F_CPU
-#define F_CPU 16000000UL
-#endif
-
-#define I2C_READ 1
-#define I2C_WRITE 0
-
-#define I2C_ACK 1
-#define I2C_NACK 0
-
-#define SLAVE_BUFFER_SIZE 0x10
-
-// i2c SCL clock frequency
-#define SCL_CLOCK  800000L
-
-extern volatile uint8_t i2c_slave_buffer[SLAVE_BUFFER_SIZE];
-
-void i2c_master_init(void);
-uint8_t i2c_master_start(uint8_t address);
-void i2c_master_stop(void);
-uint8_t i2c_master_write(uint8_t data);
-uint8_t i2c_master_read(int);
-void i2c_reset_state(void);
-void i2c_slave_init(uint8_t address);
-
-
-static inline unsigned char i2c_start_read(unsigned char addr) {
-  return i2c_master_start((addr << 1) | I2C_READ);
-}
-
-static inline unsigned char i2c_start_write(unsigned char addr) {
-  return i2c_master_start((addr << 1) | I2C_WRITE);
-}
-
-// from SSD1306 scrips
-extern unsigned char i2c_rep_start(unsigned char addr);
-extern void i2c_start_wait(unsigned char addr);
-extern unsigned char i2c_readAck(void);
-extern unsigned char i2c_readNak(void);
-extern unsigned char i2c_read(unsigned char ack);
-
-#define i2c_read(ack)  (ack) ? i2c_readAck() : i2c_readNak();
-
-#endif
diff --git a/keyboards/tkc1800/keymaps/default/config.h b/keyboards/tkc1800/keymaps/default/config.h
deleted file mode 100644
index ee142927f3..0000000000
--- a/keyboards/tkc1800/keymaps/default/config.h
+++ /dev/null
@@ -1,24 +0,0 @@
-/* Copyright 2017 Mathias Andersson <wraul@dbox.se>
- *
- * 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_I2C
-#define SSD1306OLED
-//#define OLED_ROTATE180
-#define SSD1306_ADDRESS 0x3C
-
-// place overrides here
diff --git a/keyboards/tkc1800/keymaps/default/keymap.c b/keyboards/tkc1800/keymaps/default/keymap.c
index 5455934a30..4f4c7f8e9c 100644
--- a/keyboards/tkc1800/keymaps/default/keymap.c
+++ b/keyboards/tkc1800/keymaps/default/keymap.c
@@ -13,11 +13,8 @@
  * You should have received a copy of the GNU General Public License
  * along with this program.  If not, see <http://www.gnu.org/licenses/>.
  */
+ 
 #include QMK_KEYBOARD_H
-#include "LUFA/Drivers/Peripheral/TWI.h"
-#include "i2c.h"
-#include "ssd1306.h"
-
 
 //Layers
 
@@ -26,13 +23,6 @@ enum {
   FUNCTION,
 };
 
-bool screenWorks = 0;
-
-//13 characters max without re-writing the "Layer: " format in iota_gfx_task_user()
-static char layer_lookup[][14] = {"Base","Function"};
-
-
-
 const uint16_t PROGMEM keymaps[][MATRIX_ROWS][MATRIX_COLS] = {
   /* Keymap BASE: (Base Layer) Default Layer
    * ,-------------------------------------------------------.     ,-------------------.
@@ -88,72 +78,29 @@ const uint16_t PROGMEM keymaps[][MATRIX_ROWS][MATRIX_COLS] = {
   ),
 };
 
-bool process_record_user(uint16_t keycode, keyrecord_t *record) {
-  return true;
-}
-
-void led_set_user(uint8_t usb_led) {
 
-}
-
-void matrix_init_user(void) {
-  #ifdef USE_I2C
-    i2c_master_init();
-    #ifdef SSD1306OLED
-      // calls code for the SSD1306 OLED
-      _delay_ms(400);
-      TWI_Init(TWI_BIT_PRESCALE_1, TWI_BITLENGTH_FROM_FREQ(1, 800000));
-      if ( iota_gfx_init() ) { // turns on the display
-        screenWorks = 1;
-      }
-    #endif
-  #endif
-  #ifdef AUDIO_ENABLE
-    startup_user();
-  #endif
-}
-
-void matrix_scan_user(void) {
-  #ifdef SSD1306OLED
-    if ( screenWorks ) {
-      iota_gfx_task();  // this is what updates the display continuously
-    };
-  #endif
-}
-
-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) {
-  #if DEBUG_TO_SCREEN
-    if (debug_enable) {
-      return;
+#ifdef OLED_DRIVER_ENABLE
+void oled_task_user(void) {
+    oled_write_P(PSTR("TKC1800\n"),false);
+	// Host Keyboard Layer Status
+    oled_write_P(PSTR("Layer: "), false);
+
+    switch (get_highest_layer(layer_state)) {
+        case BASE:
+            oled_write_P(PSTR("Base\n"), false);
+            break;
+        case FUNCTION:
+            oled_write_P(PSTR("Function\n"), false);
+            break;
+        default:
+            // Or use the write_ln shortcut over adding '\n' to the end of your string
+            oled_write_ln_P(PSTR("Undefined"), false);
     }
-  #endif
-
-  struct CharacterMatrix matrix;
-
-  matrix_clear(&matrix);
-  matrix_write_P(&matrix, PSTR("TKC1800"));
-
-  uint8_t layer = biton32(layer_state);
-
-  char buf[40];
-  snprintf(buf,sizeof(buf), "Undef-%d", layer);
-  matrix_write_P(&matrix, PSTR("\nLayer: "));
-  matrix_write(&matrix, layer_lookup[layer]);
 
-  // Host Keyboard LED Status
-  char led[40];
-    snprintf(led, sizeof(led), "\n\n%s  %s  %s",
-            (host_keyboard_leds() & (1<<USB_LED_NUM_LOCK)) ? "NUMLOCK" : "       ",
-            (host_keyboard_leds() & (1<<USB_LED_CAPS_LOCK)) ? "CAPS" : "    ",
-            (host_keyboard_leds() & (1<<USB_LED_SCROLL_LOCK)) ? "SCLK" : "    ");
-  matrix_write(&matrix, led);
-  matrix_update(&display, &matrix);
+    // Host Keyboard LED Status
+    led_t led_state = host_keyboard_led_state();
+    oled_write_P(led_state.num_lock ? PSTR("NUM ") : PSTR("    "), false);
+    oled_write_P(led_state.caps_lock ? PSTR("CAP ") : PSTR("    "), false);
+    oled_write_P(led_state.scroll_lock ? PSTR("SCR ") : PSTR("    "), false);
 }
+#endif
\ No newline at end of file
diff --git a/keyboards/tkc1800/keymaps/smt/config.h b/keyboards/tkc1800/keymaps/smt/config.h
deleted file mode 100644
index ee142927f3..0000000000
--- a/keyboards/tkc1800/keymaps/smt/config.h
+++ /dev/null
@@ -1,24 +0,0 @@
-/* Copyright 2017 Mathias Andersson <wraul@dbox.se>
- *
- * 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_I2C
-#define SSD1306OLED
-//#define OLED_ROTATE180
-#define SSD1306_ADDRESS 0x3C
-
-// place overrides here
diff --git a/keyboards/tkc1800/keymaps/smt/keymap.c b/keyboards/tkc1800/keymaps/smt/keymap.c
index 9f506b443b..9b6ad80d3a 100644
--- a/keyboards/tkc1800/keymaps/smt/keymap.c
+++ b/keyboards/tkc1800/keymaps/smt/keymap.c
@@ -13,10 +13,8 @@
  * You should have received a copy of the GNU General Public License
  * along with this program.  If not, see <http://www.gnu.org/licenses/>.
  */
+
 #include QMK_KEYBOARD_H
-#include "LUFA/Drivers/Peripheral/TWI.h"
-#include "i2c.h"
-#include "ssd1306.h"
 
 // Custom macros
 #define CTL_ESC     CTL_T(KC_ESC)               // Tap for Esc, hold for Ctrl
@@ -32,11 +30,6 @@ enum {
   FUNCTION,
 };
 
-//13 characters max without re-writing the "Layer: " format in iota_gfx_task_user()
-static char layer_lookup[][14] = {"Qwerty","Dvorak","Function"};
-
-
-
 const uint16_t PROGMEM keymaps[][MATRIX_ROWS][MATRIX_COLS] = {
   /* Keymap QWERTY: (Qwerty Layer) Default Layer
    * ,-------------------------------------------------------.     ,-------------------.
@@ -151,64 +144,34 @@ bool process_record_user(uint16_t keycode, keyrecord_t *record) {
   return true;
 }
 
-void led_set_user(uint8_t usb_led) {
-
-}
-
-void matrix_init_user(void) {
-  #ifdef USE_I2C
-    i2c_master_init();
-    #ifdef SSD1306OLED
-      // calls code for the SSD1306 OLED
-      _delay_ms(400);
-      TWI_Init(TWI_BIT_PRESCALE_1, TWI_BITLENGTH_FROM_FREQ(1, 800000));
-      iota_gfx_init();   // turns on the display
-    #endif
-  #endif
-  #ifdef AUDIO_ENABLE
-    startup_user();
-  #endif
-}
-
-void matrix_scan_user(void) {
-  #ifdef SSD1306OLED
-    iota_gfx_task();  // this is what updates the display continuously
-  #endif
-}
-
-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) {
-  #if DEBUG_TO_SCREEN
-    if (debug_enable) {
-      return;
+#ifdef OLED_DRIVER_ENABLE
+void oled_task_user(void) {
+    oled_write_P(PSTR("TKC1800\n"),false);
+	// Host Keyboard Layer Status
+    oled_write_P(PSTR("Layer: "), false);
+
+    switch (get_highest_layer(layer_state)) {
+        case QWERTY:
+            oled_write_P(PSTR("Base\n"), false);
+            break;
+		case COLEMAK:
+            oled_write_P(PSTR("Colemak\n"), false);
+            break;
+		case DVORAK:
+            oled_write_P(PSTR("Dvorak\n"), false);
+            break;
+        case FUNCTION:
+            oled_write_P(PSTR("Function\n"), false);
+            break;
+        default:
+            // Or use the write_ln shortcut over adding '\n' to the end of your string
+            oled_write_ln_P(PSTR("Undefined"), false);
     }
-  #endif
-
-  struct CharacterMatrix matrix;
-
-  matrix_clear(&matrix);
-  matrix_write_P(&matrix, PSTR("TKC1800"));
-
-  uint8_t layer = biton32(layer_state);
-
-  char buf[40];
-  snprintf(buf,sizeof(buf), "Undef-%d", layer);
-  matrix_write_P(&matrix, PSTR("\nLayer: "));
-  matrix_write(&matrix, layer_lookup[layer]);
 
-  // Host Keyboard LED Status
-  char led[40];
-    snprintf(led, sizeof(led), "\n\n%s  %s  %s",
-            (host_keyboard_leds() & (1<<USB_LED_NUM_LOCK)) ? "NUMLOCK" : "       ",
-            (host_keyboard_leds() & (1<<USB_LED_CAPS_LOCK)) ? "CAPS" : "    ",
-            (host_keyboard_leds() & (1<<USB_LED_SCROLL_LOCK)) ? "SCLK" : "    ");
-  matrix_write(&matrix, led);
-  matrix_update(&display, &matrix);
+    // Host Keyboard LED Status
+    led_t led_state = host_keyboard_led_state();
+    oled_write_P(led_state.num_lock ? PSTR("NUM ") : PSTR("    "), false);
+    oled_write_P(led_state.caps_lock ? PSTR("CAP ") : PSTR("    "), false);
+    oled_write_P(led_state.scroll_lock ? PSTR("SCR ") : PSTR("    "), false);
 }
+#endif
\ No newline at end of file
diff --git a/keyboards/tkc1800/keymaps/via/keymap.c b/keyboards/tkc1800/keymaps/via/keymap.c
index 5455934a30..76fdf05406 100644
--- a/keyboards/tkc1800/keymaps/via/keymap.c
+++ b/keyboards/tkc1800/keymaps/via/keymap.c
@@ -14,10 +14,6 @@
  * along with this program.  If not, see <http://www.gnu.org/licenses/>.
  */
 #include QMK_KEYBOARD_H
-#include "LUFA/Drivers/Peripheral/TWI.h"
-#include "i2c.h"
-#include "ssd1306.h"
-
 
 //Layers
 
@@ -26,13 +22,6 @@ enum {
   FUNCTION,
 };
 
-bool screenWorks = 0;
-
-//13 characters max without re-writing the "Layer: " format in iota_gfx_task_user()
-static char layer_lookup[][14] = {"Base","Function"};
-
-
-
 const uint16_t PROGMEM keymaps[][MATRIX_ROWS][MATRIX_COLS] = {
   /* Keymap BASE: (Base Layer) Default Layer
    * ,-------------------------------------------------------.     ,-------------------.
@@ -88,72 +77,28 @@ const uint16_t PROGMEM keymaps[][MATRIX_ROWS][MATRIX_COLS] = {
   ),
 };
 
-bool process_record_user(uint16_t keycode, keyrecord_t *record) {
-  return true;
-}
-
-void led_set_user(uint8_t usb_led) {
-
-}
-
-void matrix_init_user(void) {
-  #ifdef USE_I2C
-    i2c_master_init();
-    #ifdef SSD1306OLED
-      // calls code for the SSD1306 OLED
-      _delay_ms(400);
-      TWI_Init(TWI_BIT_PRESCALE_1, TWI_BITLENGTH_FROM_FREQ(1, 800000));
-      if ( iota_gfx_init() ) { // turns on the display
-        screenWorks = 1;
-      }
-    #endif
-  #endif
-  #ifdef AUDIO_ENABLE
-    startup_user();
-  #endif
-}
-
-void matrix_scan_user(void) {
-  #ifdef SSD1306OLED
-    if ( screenWorks ) {
-      iota_gfx_task();  // this is what updates the display continuously
-    };
-  #endif
-}
-
-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) {
-  #if DEBUG_TO_SCREEN
-    if (debug_enable) {
-      return;
+#ifdef OLED_DRIVER_ENABLE
+void oled_task_user(void) {
+    oled_write_P(PSTR("TKC1800\n"),false);
+	// Host Keyboard Layer Status
+    oled_write_P(PSTR("Layer: "), false);
+
+    switch (get_highest_layer(layer_state)) {
+        case BASE:
+            oled_write_P(PSTR("Base\n"), false);
+            break;
+        case FUNCTION:
+            oled_write_P(PSTR("Function\n"), false);
+            break;
+        default:
+            // Or use the write_ln shortcut over adding '\n' to the end of your string
+            oled_write_ln_P(PSTR("Undefined"), false);
     }
-  #endif
-
-  struct CharacterMatrix matrix;
-
-  matrix_clear(&matrix);
-  matrix_write_P(&matrix, PSTR("TKC1800"));
-
-  uint8_t layer = biton32(layer_state);
-
-  char buf[40];
-  snprintf(buf,sizeof(buf), "Undef-%d", layer);
-  matrix_write_P(&matrix, PSTR("\nLayer: "));
-  matrix_write(&matrix, layer_lookup[layer]);
 
-  // Host Keyboard LED Status
-  char led[40];
-    snprintf(led, sizeof(led), "\n\n%s  %s  %s",
-            (host_keyboard_leds() & (1<<USB_LED_NUM_LOCK)) ? "NUMLOCK" : "       ",
-            (host_keyboard_leds() & (1<<USB_LED_CAPS_LOCK)) ? "CAPS" : "    ",
-            (host_keyboard_leds() & (1<<USB_LED_SCROLL_LOCK)) ? "SCLK" : "    ");
-  matrix_write(&matrix, led);
-  matrix_update(&display, &matrix);
+    // Host Keyboard LED Status
+    led_t led_state = host_keyboard_led_state();
+    oled_write_P(led_state.num_lock ? PSTR("NUM ") : PSTR("    "), false);
+    oled_write_P(led_state.caps_lock ? PSTR("CAP ") : PSTR("    "), false);
+    oled_write_P(led_state.scroll_lock ? PSTR("SCR ") : PSTR("    "), false);
 }
+#endif
\ No newline at end of file
diff --git a/keyboards/tkc1800/keymaps/wkl/config.h b/keyboards/tkc1800/keymaps/wkl/config.h
deleted file mode 100644
index ee142927f3..0000000000
--- a/keyboards/tkc1800/keymaps/wkl/config.h
+++ /dev/null
@@ -1,24 +0,0 @@
-/* Copyright 2017 Mathias Andersson <wraul@dbox.se>
- *
- * 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_I2C
-#define SSD1306OLED
-//#define OLED_ROTATE180
-#define SSD1306_ADDRESS 0x3C
-
-// place overrides here
diff --git a/keyboards/tkc1800/keymaps/wkl/keymap.c b/keyboards/tkc1800/keymaps/wkl/keymap.c
index 6f331c61cc..3c65b61d11 100644
--- a/keyboards/tkc1800/keymaps/wkl/keymap.c
+++ b/keyboards/tkc1800/keymaps/wkl/keymap.c
@@ -13,11 +13,8 @@
  * You should have received a copy of the GNU General Public License
  * along with this program.  If not, see <http://www.gnu.org/licenses/>.
  */
+ 
 #include QMK_KEYBOARD_H
-#include "LUFA/Drivers/Peripheral/TWI.h"
-#include "i2c.h"
-#include "ssd1306.h"
-
 
 //Layers
 
@@ -26,13 +23,6 @@ enum {
   FUNCTION,
 };
 
-bool screenWorks = 0;
-
-//13 characters max without re-writing the "Layer: " format in iota_gfx_task_user()
-static char layer_lookup[][14] = {"Base","Function"};
-
-
-
 const uint16_t PROGMEM keymaps[][MATRIX_ROWS][MATRIX_COLS] = {
   /* Keymap BASE: (Base Layer) Default Layer
    * ,-------------------------------------------------------.     ,-------------------.
@@ -71,72 +61,28 @@ const uint16_t PROGMEM keymaps[][MATRIX_ROWS][MATRIX_COLS] = {
   ),
 };
 
-bool process_record_user(uint16_t keycode, keyrecord_t *record) {
-  return true;
-}
-
-void led_set_user(uint8_t usb_led) {
-
-}
-
-void matrix_init_user(void) {
-  #ifdef USE_I2C
-    i2c_master_init();
-    #ifdef SSD1306OLED
-      // calls code for the SSD1306 OLED
-      _delay_ms(400);
-      TWI_Init(TWI_BIT_PRESCALE_1, TWI_BITLENGTH_FROM_FREQ(1, 800000));
-      if ( iota_gfx_init() ) { // turns on the display
-        screenWorks = 1;
-      }
-    #endif
-  #endif
-  #ifdef AUDIO_ENABLE
-    startup_user();
-  #endif
-}
-
-void matrix_scan_user(void) {
-  #ifdef SSD1306OLED
-    if ( screenWorks ) {
-      iota_gfx_task();  // this is what updates the display continuously
-    };
-  #endif
-}
-
-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) {
-  #if DEBUG_TO_SCREEN
-    if (debug_enable) {
-      return;
+#ifdef OLED_DRIVER_ENABLE
+void oled_task_user(void) {
+    oled_write_P(PSTR("TKC1800\n"),false);
+	// Host Keyboard Layer Status
+    oled_write_P(PSTR("Layer: "), false);
+
+    switch (get_highest_layer(layer_state)) {
+        case BASE:
+            oled_write_P(PSTR("Base\n"), false);
+            break;
+        case FUNCTION:
+            oled_write_P(PSTR("Function\n"), false);
+            break;
+        default:
+            // Or use the write_ln shortcut over adding '\n' to the end of your string
+            oled_write_ln_P(PSTR("Undefined"), false);
     }
-  #endif
-
-  struct CharacterMatrix matrix;
-
-  matrix_clear(&matrix);
-  matrix_write_P(&matrix, PSTR("TKC1800"));
-
-  uint8_t layer = biton32(layer_state);
-
-  char buf[40];
-  snprintf(buf,sizeof(buf), "Undef-%d", layer);
-  matrix_write_P(&matrix, PSTR("\nLayer: "));
-  matrix_write(&matrix, layer_lookup[layer]);
 
-  // Host Keyboard LED Status
-  char led[40];
-    snprintf(led, sizeof(led), "\n\n%s  %s  %s",
-            (host_keyboard_leds() & (1<<USB_LED_NUM_LOCK)) ? "NUMLOCK" : "       ",
-            (host_keyboard_leds() & (1<<USB_LED_CAPS_LOCK)) ? "CAPS" : "    ",
-            (host_keyboard_leds() & (1<<USB_LED_SCROLL_LOCK)) ? "SCLK" : "    ");
-  matrix_write(&matrix, led);
-  matrix_update(&display, &matrix);
+    // Host Keyboard LED Status
+    led_t led_state = host_keyboard_led_state();
+    oled_write_P(led_state.num_lock ? PSTR("NUM ") : PSTR("    "), false);
+    oled_write_P(led_state.caps_lock ? PSTR("CAP ") : PSTR("    "), false);
+    oled_write_P(led_state.scroll_lock ? PSTR("SCR ") : PSTR("    "), false);
 }
+#endif
\ No newline at end of file
diff --git a/keyboards/tkc1800/keymaps/yanfali/config.h b/keyboards/tkc1800/keymaps/yanfali/config.h
deleted file mode 100644
index f1390cb03f..0000000000
--- a/keyboards/tkc1800/keymaps/yanfali/config.h
+++ /dev/null
@@ -1,24 +0,0 @@
-/* Copyright 2017 Mathias Andersson <wraul@dbox.se>
- *
- * 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_I2C
-//#define SSD1306OLED
-//#define OLED_ROTATE180
-#define SSD1306_ADDRESS 0x3C
-
-// place overrides here
diff --git a/keyboards/tkc1800/keymaps/yanfali/keymap.c b/keyboards/tkc1800/keymaps/yanfali/keymap.c
index 8dad3446de..bbffc2d20b 100644
--- a/keyboards/tkc1800/keymaps/yanfali/keymap.c
+++ b/keyboards/tkc1800/keymaps/yanfali/keymap.c
@@ -13,11 +13,8 @@
  * You should have received a copy of the GNU General Public License
  * along with this program.  If not, see <http://www.gnu.org/licenses/>.
  */
+ 
 #include QMK_KEYBOARD_H
-#include "LUFA/Drivers/Peripheral/TWI.h"
-#include "i2c.h"
-#include "ssd1306.h"
-
 
 //Layers
 
@@ -26,11 +23,6 @@ enum {
 	FUNCTION,
 };
 
-//13 characters max without re-writing the "Layer: " format in iota_gfx_task_user()
-static char layer_lookup[][14] = {"Base","Function"};
-
-
-
 const uint16_t PROGMEM keymaps[][MATRIX_ROWS][MATRIX_COLS] = {
   /* Keymap BASE: (Base Layer) Default Layer
    * ,-------------------------------------------------------.     ,-------------------.
@@ -69,68 +61,28 @@ const uint16_t PROGMEM keymaps[][MATRIX_ROWS][MATRIX_COLS] = {
 	),
 };
 
-bool process_record_user(uint16_t keycode, keyrecord_t *record) {
-  return true;
-}
-
-void led_set_user(uint8_t usb_led) {
-
-}
-
-void matrix_init_user(void) {
-  #ifdef USE_I2C
-    i2c_master_init();
-    #ifdef SSD1306OLED
-      // calls code for the SSD1306 OLED
-      _delay_ms(400);
-      TWI_Init(TWI_BIT_PRESCALE_1, TWI_BITLENGTH_FROM_FREQ(1, 800000));
-      iota_gfx_init();   // turns on the display
-    #endif
-  #endif
-  #ifdef AUDIO_ENABLE
-    startup_user();
-  #endif
-}
-
-void matrix_scan_user(void) {
-  #ifdef SSD1306OLED
-    iota_gfx_task();  // this is what updates the display continuously
-  #endif
-}
-
-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) {
-  #if DEBUG_TO_SCREEN
-    if (debug_enable) {
-      return;
+#ifdef OLED_DRIVER_ENABLE
+void oled_task_user(void) {
+    oled_write_P(PSTR("TKC1800\n"),false);
+	// Host Keyboard Layer Status
+    oled_write_P(PSTR("Layer: "), false);
+
+    switch (get_highest_layer(layer_state)) {
+        case BASE:
+            oled_write_P(PSTR("Base\n"), false);
+            break;
+        case FUNCTION:
+            oled_write_P(PSTR("Function\n"), false);
+            break;
+        default:
+            // Or use the write_ln shortcut over adding '\n' to the end of your string
+            oled_write_ln_P(PSTR("Undefined"), false);
     }
-  #endif
-
-  struct CharacterMatrix matrix;
-
-  matrix_clear(&matrix);
-  matrix_write_P(&matrix, PSTR("TKC1800"));
-
-  uint8_t layer = biton32(layer_state);
-
-  char buf[40];
-  snprintf(buf,sizeof(buf), "Undef-%d", layer);
-  matrix_write_P(&matrix, PSTR("\nLayer: "));
-  matrix_write(&matrix, layer_lookup[layer]);
 
-  // Host Keyboard LED Status
-  char led[40];
-    snprintf(led, sizeof(led), "\n\n%s  %s  %s",
-            (host_keyboard_leds() & (1<<USB_LED_NUM_LOCK)) ? "NUMLOCK" : "       ",
-            (host_keyboard_leds() & (1<<USB_LED_CAPS_LOCK)) ? "CAPS" : "    ",
-            (host_keyboard_leds() & (1<<USB_LED_SCROLL_LOCK)) ? "SCLK" : "    ");
-  matrix_write(&matrix, led);
-  matrix_update(&display, &matrix);
+    // Host Keyboard LED Status
+    led_t led_state = host_keyboard_led_state();
+    oled_write_P(led_state.num_lock ? PSTR("NUM ") : PSTR("    "), false);
+    oled_write_P(led_state.caps_lock ? PSTR("CAP ") : PSTR("    "), false);
+    oled_write_P(led_state.scroll_lock ? PSTR("SCR ") : PSTR("    "), false);
 }
+#endif
\ No newline at end of file
diff --git a/keyboards/tkc1800/rules.mk b/keyboards/tkc1800/rules.mk
index 7cc3bbe20b..fa90e99807 100644
--- a/keyboards/tkc1800/rules.mk
+++ b/keyboards/tkc1800/rules.mk
@@ -9,12 +9,13 @@ MCU = at90usb1286
 #   QMK DFU      qmk-dfu
 #   ATmega32A    bootloadHID
 #   ATmega328P   USBasp
-BOOTLOADER = atmel-dfu
+BOOTLOADER = qmk-dfu
 
 # Build Options
 #   change yes to no to disable
 #
-BOOTMAGIC_ENABLE = lite     # Virtual DIP switch configuration
+
+BOOTMAGIC_ENABLE = lite      # Virtual DIP switch configuration
 MOUSEKEY_ENABLE = yes       # Mouse keys
 EXTRAKEY_ENABLE = yes       # Audio control and System control
 CONSOLE_ENABLE = no         # Console for debug
@@ -29,6 +30,4 @@ MIDI_ENABLE = no            # MIDI controls
 UNICODE_ENABLE = no         # Unicode
 BLUETOOTH_ENABLE = no       # Enable Bluetooth with the Adafruit EZ-Key HID
 AUDIO_ENABLE = no           # Audio output on port C6
-
-SRC = i2c.c \
-	  ssd1306.c
+OLED_DRIVER_ENABLE = yes
\ No newline at end of file
diff --git a/keyboards/tkc1800/tkc1800.c b/keyboards/tkc1800/tkc1800.c
index bc6676846d..4232c97d54 100644
--- a/keyboards/tkc1800/tkc1800.c
+++ b/keyboards/tkc1800/tkc1800.c
@@ -16,6 +16,13 @@
 #include "tkc1800.h"
 #include "led.h"
 
+void keyboard_pre_init_kb(void) {
+  setPinInputHigh(D0);
+  setPinInputHigh(D1);
+
+  keyboard_pre_init_user();
+}
+
 void matrix_init_kb(void) {
     // put your keyboard start-up code here
     // runs once when the firmware starts up