[Keyboard] Refactor jj40 to current standards (#5574)

* Refactor jj40 in line with current ps2avrgb template

* Disable bootmagic lite as it seems to not work on atmega32a/bootloadHID

* Add backlight pwm bodge till #4324 lands

* Increase planck keymap compatibility

12 files changed, 143 insertions, 763 deletions

diff --git a/keyboards/jj40/backlight.c b/keyboards/jj40/backlight.c
deleted file mode 100644
index fbd241fa9d..0000000000
--- a/keyboards/jj40/backlight.c
+++ /dev/null
@@ -1,213 +0,0 @@
-/**
- * Backlighting code for PS2AVRGB boards (ATMEGA32A)
- * Kenneth A. (github.com/krusli | krusli.me)
- */
-
-#include "backlight.h"
-#include "quantum.h"
-
-#include <avr/pgmspace.h>
-#include <avr/interrupt.h>
-
-#include "backlight_custom.h"
-#include "breathing_custom.h"
-
-// DEBUG
-#include <stdlib.h>
-#include <stdio.h>
-
-// Port D: digital pins of the AVR chipset
-#define NUMLOCK_PORT    (1 << 0)  // D0
-#define CAPSLOCK_PORT   (1 << 1)  // D1
-#define BACKLIGHT_PORT  (1 << 4)  // D4
-#define SCROLLLOCK_PORT (1 << 6)  // D6
-
-#define TIMER_CLK_DIV64			  0x03	///< Timer clocked at F_CPU/64
-#define TIMER1PRESCALE	TIMER_CLK_DIV64 ///< timer 1 prescaler default
-
-#define TIMER_PRESCALE_MASK		0x07	///< Timer Prescaler Bit-Mask
-
-#define PWM_MAX 0xFF
-#define TIMER_TOP 255 // 8 bit PWM
-
-extern backlight_config_t backlight_config;
-
-/**
- * References
- * Port Registers: https://www.arduino.cc/en/Reference/PortManipulation
- * TCCR1A: https://electronics.stackexchange.com/questions/92350/what-is-the-difference-between-tccr1a-and-tccr1b
- * Timers: http://www.avrbeginners.net/architecture/timers/timers.html
- * 16-bit timer setup: http://sculland.com/ATmega168/Interrupts-And-Timers/16-Bit-Timer-Setup/
- * PS2AVRGB firmware: https://github.com/showjean/ps2avrU/tree/master/firmware
- */
-
-// @Override
-// turn LEDs on and off depending on USB caps/num/scroll lock states.
-__attribute__ ((weak))
-void led_set_user(uint8_t usb_led) {
-    if (usb_led & (1 << USB_LED_NUM_LOCK)) {
-      // turn on
-      DDRD  |= NUMLOCK_PORT;
-      PORTD |= NUMLOCK_PORT;
-    } else {
-      // turn off
-      DDRD  &= ~NUMLOCK_PORT;
-      PORTD &= ~NUMLOCK_PORT;
-    }
-
-    if (usb_led & (1 << USB_LED_CAPS_LOCK)) {
-      DDRD  |= CAPSLOCK_PORT;
-      PORTD |= CAPSLOCK_PORT;
-    } else {
-      DDRD  &= ~CAPSLOCK_PORT;
-      PORTD &= ~CAPSLOCK_PORT;
-    }
-
-    if (usb_led & (1 << USB_LED_SCROLL_LOCK)) {
-      DDRD  |= SCROLLLOCK_PORT;
-      PORTD |= SCROLLLOCK_PORT;
-    } else {
-      DDRD  &= ~SCROLLLOCK_PORT;
-      PORTD &= ~SCROLLLOCK_PORT;
-    }
-}
-
-#ifdef BACKLIGHT_ENABLE
-
-// sets up Timer 1 for 8-bit PWM
-void timer1PWMSetup(void) { // NOTE ONLY CALL THIS ONCE
-  // default 8 bit mode
-  TCCR1A &= ~(1 << 1); // cbi(TCCR1A,PWM11); <- set PWM11 bit to HIGH
-  TCCR1A |= (1 << 0);  // sbi(TCCR1A,PWM10); <- set PWM10 bit to LOW
-
-  // clear output compare value A
-  // outb(OCR1AH, 0);
-  // outb(OCR1AL, 0);
-
-  // clear output comparator registers for B
-	OCR1BH = 0; // outb(OCR1BH, 0);
-	OCR1BL = 0; // outb(OCR1BL, 0);
-}
-
-bool is_init = false;
-void timer1Init(void) {
-  // timer1SetPrescaler(TIMER1PRESCALE)
-  // set to DIV/64
-  (TCCR1B) = ((TCCR1B) & ~TIMER_PRESCALE_MASK) | TIMER1PRESCALE;
-
-  // reset TCNT1
-  TCNT1H = 0;  // outb(TCNT1H, 0);
-	TCNT1L = 0;  // outb(TCNT1L, 0);
-
-  // TOIE1: Timer Overflow Interrupt Enable (Timer 1);
-	TIMSK |= _BV(TOIE1); // sbi(TIMSK, TOIE1);
-
-  is_init = true;
-}
-
-void timer1UnInit(void) {
-  // set prescaler back to NONE
-  (TCCR1B) = ((TCCR1B) & ~TIMER_PRESCALE_MASK) | 0x00;  // TIMERRTC_CLK_STOP
-
-  // disable timer overflow interrupt
-  TIMSK &= ~_BV(TOIE1); // overflow bit?
-
-  setPWM(0);
-
-  is_init = false;
-}
-
-
-// handle TCNT1 overflow
-//! Interrupt handler for tcnt1 overflow interrupt
-ISR(TIMER1_OVF_vect, ISR_NOBLOCK)
-{
-	// sei();
-  // handle breathing here
-  #ifdef BACKLIGHT_BREATHING
-  if (is_breathing()) {
-    custom_breathing_handler();
-  }
-  #endif
-
-  // TODO call user defined function
-}
-
-// enable timer 1 PWM
-// timer1PWMBOn()
-void timer1PWMBEnable(void) {
-  // turn on channel B (OC1B) PWM output
-  // set OC1B as non-inverted PWM
-  TCCR1A |= _BV(COM1B1);
-  TCCR1A &= ~_BV(COM1B0);
-}
-
-// disable timer 1 PWM
-// timer1PWMBOff()
-void timer1PWMBDisable(void) {
-  TCCR1A &= ~_BV(COM1B1);
-  TCCR1A &= ~_BV(COM1B0);
-}
-
-void enableBacklight(void) {
-  DDRD  |= BACKLIGHT_PORT;  // set digital pin 4 as output
-  PORTD |= BACKLIGHT_PORT;  // set digital pin 4 to high
-}
-
-void disableBacklight(void) {
-  // DDRD  &= ~BACKLIGHT_PORT;  // set digital pin 4 as input
-  PORTD &= ~BACKLIGHT_PORT;  // set digital pin 4 to low
-}
-
-void startPWM(void) {
-  timer1Init();
-  timer1PWMBEnable();
-  enableBacklight();
-}
-
-void stopPWM(void) {
-  timer1UnInit();
-  disableBacklight();
-  timer1PWMBDisable();
-}
-
-void b_led_init_ports(void) {
-  /* turn backlight on/off depending on user preference */
-  #if BACKLIGHT_ON_STATE == 0
-    // DDRx register: sets the direction of Port D
-    // DDRD  &= ~BACKLIGHT_PORT;  // set digital pin 4 as input
-    PORTD &= ~BACKLIGHT_PORT;  // set digital pin 4 to low
-  #else
-    DDRD  |= BACKLIGHT_PORT;  // set digital pin 4 as output
-    PORTD |= BACKLIGHT_PORT;  // set digital pin 4 to high
-  #endif
-
-  timer1PWMSetup();
-  startPWM();
-
-  #ifdef BACKLIGHT_BREATHING
-  breathing_enable();
-  #endif
-}
-
-void b_led_set(uint8_t level) {
-  if (level > BACKLIGHT_LEVELS) {
-    level = BACKLIGHT_LEVELS;
-  }
-
-  setPWM((int)(TIMER_TOP * (float) level / BACKLIGHT_LEVELS));
-}
-
-// called every matrix scan
-void b_led_task(void) {
-  // do nothing for now
-}
-
-void setPWM(uint16_t xValue) {
-  if (xValue > TIMER_TOP) {
-    xValue = TIMER_TOP;
-  }
-  OCR1B = xValue; // timer1PWMBSet(xValue);
-}
-
-#endif  // BACKLIGHT_ENABLE
diff --git a/keyboards/jj40/backlight_custom.h b/keyboards/jj40/backlight_custom.h
deleted file mode 100644
index 7210be840e..0000000000
--- a/keyboards/jj40/backlight_custom.h
+++ /dev/null
@@ -1,15 +0,0 @@
-/**
- * Backlighting code for PS2AVRGB boards (ATMEGA32A)
- * Kenneth A. (github.com/krusli | krusli.me)
- */
-
-#ifndef BACKLIGHT_CUSTOM_H
-#define BACKLIGHT_CUSTOM_H
-
-#include <avr/pgmspace.h>
-void b_led_init_ports(void);
-void b_led_set(uint8_t level);
-void b_led_task(void);
-void setPWM(uint16_t xValue);
-
-#endif  // BACKLIGHT_CUSTOM_H
diff --git a/keyboards/jj40/breathing_custom.h b/keyboards/jj40/breathing_custom.h
deleted file mode 100644
index 71416b1b45..0000000000
--- a/keyboards/jj40/breathing_custom.h
+++ /dev/null
@@ -1,140 +0,0 @@
-/**
- * Breathing effect code for PS2AVRGB boards (ATMEGA32A)
- * Works in conjunction with `backlight.c`.
- *
- * Code adapted from `quantum.c` to register with the existing TIMER1 overflow
- * handler in `backlight.c` instead of setting up its own timer.
- * Kenneth A. (github.com/krusli | krusli.me)
- */
-
-#ifdef BACKLIGHT_ENABLE
-#ifdef BACKLIGHT_BREATHING
-
-#include "backlight_custom.h"
-
-#ifndef BREATHING_PERIOD
-#define BREATHING_PERIOD 6
-#endif
-
-#define breathing_min() do {breathing_counter = 0;} while (0)
-#define breathing_max() do {breathing_counter = breathing_period * 244 / 2;} while (0)
-
-// TODO make this share code with quantum.c
-
-#define BREATHING_NO_HALT  0
-#define BREATHING_HALT_OFF 1
-#define BREATHING_HALT_ON  2
-#define BREATHING_STEPS 128
-
-static uint8_t breathing_period = BREATHING_PERIOD;
-static uint8_t breathing_halt = BREATHING_NO_HALT;
-static uint16_t breathing_counter = 0;
-
-static bool breathing = false;
-
-bool is_breathing(void) {
-  return breathing;
-}
-
-// See http://jared.geek.nz/2013/feb/linear-led-pwm
-static uint16_t cie_lightness(uint16_t v) {
-  if (v <= 5243) // if below 8% of max
-    return v / 9; // same as dividing by 900%
-  else {
-    uint32_t y = (((uint32_t) v + 10486) << 8) / (10486 + 0xFFFFUL); // add 16% of max and compare
-    // to get a useful result with integer division, we shift left in the expression above
-    // and revert what we've done again after squaring.
-    y = y * y * y >> 8;
-    if (y > 0xFFFFUL) // prevent overflow
-      return 0xFFFFU;
-    else
-      return (uint16_t) y;
-  }
-}
-
-void breathing_enable(void) {
-  breathing = true;
-  breathing_counter = 0;
-  breathing_halt = BREATHING_NO_HALT;
-  // interrupt already registered
-}
-
-void breathing_pulse(void) {
-  if (get_backlight_level() == 0)
-    breathing_min();
-  else
-    breathing_max();
-  breathing_halt = BREATHING_HALT_ON;
-  // breathing_interrupt_enable();
-  breathing = true;
-}
-
-void breathing_disable(void) {
-  breathing = false;
-  // backlight_set(get_backlight_level());
-  b_led_set(get_backlight_level()); // custom implementation of backlight_set()
-}
-
-void breathing_self_disable(void)
-{
-  if (get_backlight_level() == 0)
-    breathing_halt = BREATHING_HALT_OFF;
-  else
-    breathing_halt = BREATHING_HALT_ON;
-}
-
-void breathing_toggle(void) {
-  if (is_breathing())
-    breathing_disable();
-  else
-    breathing_enable();
-}
-
-void breathing_period_set(uint8_t value)
-{
-  if (!value)
-    value = 1;
-  breathing_period = value;
-}
-
-void breathing_period_default(void) {
-  breathing_period_set(BREATHING_PERIOD);
-}
-
-void breathing_period_inc(void)
-{
-  breathing_period_set(breathing_period+1);
-}
-
-void breathing_period_dec(void)
-{
-  breathing_period_set(breathing_period-1);
-}
-
-/* To generate breathing curve in python:
- * from math import sin, pi; [int(sin(x/128.0*pi)**4*255) for x in range(128)]
- */
-static const uint8_t breathing_table[BREATHING_STEPS] PROGMEM = {0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 1, 1, 2, 3, 4, 5, 6, 8, 10, 12, 15, 17, 20, 24, 28, 32, 36, 41, 46, 51, 57, 63, 70, 76, 83, 91, 98, 106, 113, 121, 129, 138, 146, 154, 162, 170, 178, 185, 193, 200, 207, 213, 220, 225, 231, 235, 240, 244, 247, 250, 252, 253, 254, 255, 254, 253, 252, 250, 247, 244, 240, 235, 231, 225, 220, 213, 207, 200, 193, 185, 178, 170, 162, 154, 146, 138, 129, 121, 113, 106, 98, 91, 83, 76, 70, 63, 57, 51, 46, 41, 36, 32, 28, 24, 20, 17, 15, 12, 10, 8, 6, 5, 4, 3, 2, 1, 1, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0};
-
-// Use this before the cie_lightness function.
-static inline uint16_t scale_backlight(uint16_t v) {
-  return v / BACKLIGHT_LEVELS * get_backlight_level();
-}
-
-void custom_breathing_handler(void) {
-  uint16_t interval = (uint16_t) breathing_period * 244 / BREATHING_STEPS;
-  // resetting after one period to prevent ugly reset at overflow.
-  breathing_counter = (breathing_counter + 1) % (breathing_period * 244);
-  uint8_t index = breathing_counter / interval % BREATHING_STEPS;
-
-  if (((breathing_halt == BREATHING_HALT_ON) && (index == BREATHING_STEPS / 2)) ||
-      ((breathing_halt == BREATHING_HALT_OFF) && (index == BREATHING_STEPS - 1)))
-  {
-      // breathing_interrupt_disable();
-  }
-
-  setPWM(cie_lightness(scale_backlight((uint16_t) pgm_read_byte(&breathing_table[index]) * 0x0101U)));
-}
-
-#endif // BACKLIGHT_BREATHING
-#endif  // BACKLIGHT_ENABLE
diff --git a/keyboards/jj40/config.h b/keyboards/jj40/config.h
index 67561b0b28..e88147ac85 100644
--- a/keyboards/jj40/config.h
+++ b/keyboards/jj40/config.h
@@ -1,51 +1,55 @@
 /*
 Copyright 2017 Luiz Ribeiro <luizribeiro@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/>.
 */
 
-#include "config_common.h"
+#pragma once
 
-#ifndef CONFIG_H
-#define CONFIG_H
+#include "config_common.h"
 
 #define VENDOR_ID       0x20A0
 #define PRODUCT_ID      0x422D
 // TODO: share these strings with usbconfig.h
 // Edit usbconfig.h to change these.
-#define MANUFACTURER    winkeyless.kr
+#define MANUFACTURER    Kprepublic
 #define PRODUCT         jj40
 
 /* matrix size */
-#define MATRIX_ROWS 8
-#define MATRIX_COLS 15
+#define MATRIX_ROWS 4
+#define MATRIX_COLS 12
+#define MATRIX_ROW_PINS { B0, B1, B3, B4 }
+#define MATRIX_COL_PINS { C4, C5, C6, C7, A4, A5, A6, A7, A3, A2, A1, A0 }
 
 /* COL2ROW or ROW2COL */
 #define DIODE_DIRECTION COL2ROW
 
+#define BACKLIGHT_PIN D4
 #define BACKLIGHT_LEVELS 12
-// #define BACKLIGHT_BREATHING  // works, but BL_TOGG might not work
-
-#define TAPPING_TOGGLE 3
-
-#define NO_UART 1
+// #define BACKLIGHT_BREATHING  // Requires #4324 to enable hardware pwm for atmega32a
 
 /* RGB underglow */
-// The RGB_DI_PIN value seems to be shared between all PS2AVRGB boards.
-// The same pin is used on the JJ40, at least.
+// NOTE: for PS2AVRGB boards, underglow commands are sent via I2C to 0xB0.
 #define RGBLED_NUM 5
-#define RGB_DI_PIN E2 // NOTE: for PS2AVRGB boards, underglow commands are sent via I2C to 0xB0.
 #define RGBLIGHT_ANIMATIONS
 
-#endif
+/* Debounce reduces chatter (unintended double-presses) - set 0 if debouncing is not needed */
+#define DEBOUNCING_DELAY 5
+
+#define NO_UART 1
+
+/* key combination for magic key command */
+/* defined by default; to change, uncomment and set to the combination you want */
+// #define IS_COMMAND() (get_mods() == (MOD_BIT(KC_LSHIFT) | MOD_BIT(KC_RSHIFT)))
+
+/* Bootmagic Lite key configuration */
+// #define BOOTMAGIC_LITE_ROW 0
+// #define BOOTMAGIC_LITE_COLUMN 0
diff --git a/keyboards/jj40/i2c.c b/keyboards/jj40/i2c.c
deleted file mode 100644
index c27f3e3d17..0000000000
--- a/keyboards/jj40/i2c.c
+++ /dev/null
@@ -1,104 +0,0 @@
-/*
-Copyright 2016 Luiz Ribeiro <luizribeiro@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/>.
-*/
-
-#include <avr/io.h>
-#include <util/twi.h>
-
-#include "i2c.h"
-
-void i2c_set_bitrate(uint16_t bitrate_khz) {
-    uint8_t bitrate_div = ((F_CPU / 1000l) / bitrate_khz);
-    if (bitrate_div >= 16) {
-        bitrate_div = (bitrate_div - 16) / 2;
-    }
-    TWBR = bitrate_div;
-}
-
-void i2c_init(void) {
-    // set pull-up resistors on I2C bus pins
-    PORTC |= 0b11;
-
-    i2c_set_bitrate(400);
-
-    // enable TWI (two-wire interface)
-    TWCR |= (1 << TWEN);
-
-    // enable TWI interrupt and slave address ACK
-    TWCR |= (1 << TWIE);
-    TWCR |= (1 << TWEA);
-}
-
-uint8_t i2c_start(uint8_t address) {
-    // reset TWI control register
-    TWCR = 0;
-
-    // begin transmission and wait for it to end
-    TWCR = (1<<TWINT) | (1<<TWSTA) | (1<<TWEN);
-    while (!(TWCR & (1<<TWINT)));
-
-    // check if the start condition was successfully transmitted
-    if ((TWSR & 0xF8) != TW_START) {
-        return 1;
-    }
-
-    // transmit address and wait
-    TWDR = address;
-    TWCR = (1<<TWINT) | (1<<TWEN);
-    while (!(TWCR & (1<<TWINT)));
-
-    // check if the device has acknowledged the READ / WRITE mode
-    uint8_t twst = TW_STATUS & 0xF8;
-    if ((twst != TW_MT_SLA_ACK) && (twst != TW_MR_SLA_ACK)) {
-        return 1;
-    }
-
-    return 0;
-}
-
-void i2c_stop(void) {
-    TWCR = (1<<TWINT) | (1<<TWEN) | (1<<TWSTO);
-}
-
-uint8_t i2c_write(uint8_t data) {
-    TWDR = data;
-
-    // transmit data and wait
-    TWCR = (1<<TWINT) | (1<<TWEN);
-    while (!(TWCR & (1<<TWINT)));
-
-    if ((TWSR & 0xF8) != TW_MT_DATA_ACK) {
-        return 1;
-    }
-
-    return 0;
-}
-
-uint8_t i2c_send(uint8_t address, uint8_t *data, uint16_t length) {
-    if (i2c_start(address)) {
-        return 1;
-    }
-
-    for (uint16_t i = 0; i < length; i++) {
-        if (i2c_write(data[i])) {
-            return 1;
-        }
-    }
-
-    i2c_stop();
-
-    return 0;
-}
diff --git a/keyboards/jj40/i2c.h b/keyboards/jj40/i2c.h
deleted file mode 100644
index 27c9d3d050..0000000000
--- a/keyboards/jj40/i2c.h
+++ /dev/null
@@ -1,25 +0,0 @@
-/*
-Copyright 2016 Luiz Ribeiro <luizribeiro@gmail.com>
-
-This program is free software: you can redistribute it and/or modify
-it under the terms of the GNU General Public License as published by
-the Free Software Foundation, either version 2 of the License, or
-(at your option) any later version.
-
-This program is distributed in the hope that it will be useful,
-but WITHOUT ANY WARRANTY; without even the implied warranty of
-MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
-GNU General Public License for more details.
-
-You should have received a copy of the GNU General Public License
-along with this program.  If not, see <http://www.gnu.org/licenses/>.
-*/
-
-#ifndef __I2C_H__
-#define __I2C_H__
-
-void i2c_init(void);
-void i2c_set_bitrate(uint16_t bitrate_khz);
-uint8_t i2c_send(uint8_t address, uint8_t *data, uint16_t length);
-
-#endif
diff --git a/keyboards/jj40/jj40.c b/keyboards/jj40/jj40.c
index 51f5295f46..26cfa6c067 100644
--- a/keyboards/jj40/jj40.c
+++ b/keyboards/jj40/jj40.c
@@ -18,53 +18,26 @@ along with this program.  If not, see <http://www.gnu.org/licenses/>.
 
 #include "jj40.h"
 
-#include <avr/pgmspace.h>
-
-#include "action_layer.h"
-#include "quantum.h"
+#ifdef RGBLIGHT_ENABLE
 
-#include "i2c.h"
+#include <string.h>
+#include "i2c_master.h"
+#include "rgblight.h"
 
-#include "backlight.h"
-#include "backlight_custom.h"
+extern rgblight_config_t rgblight_config;
 
-// for keyboard subdirectory level init functions
-// @Override
 void matrix_init_kb(void) {
+  i2c_init();
   // call user level keymaps, if any
   matrix_init_user();
 }
-
-#ifdef BACKLIGHT_ENABLE
-/// Overrides functions in `quantum.c`
-void backlight_init_ports(void) {
-  b_led_init_ports();
-}
-
-void backlight_task(void) {
-  b_led_task();
-}
-
-void backlight_set(uint8_t level) {
-  b_led_set(level);
-}
-#endif
-
-#ifdef RGBLIGHT_ENABLE
-extern rgblight_config_t rgblight_config;
-
 // custom RGB driver
 void rgblight_set(void) {
   if (!rgblight_config.enable) {
-    for (uint8_t i=0; i<RGBLED_NUM; i++) {
-      led[i].r = 0;
-      led[i].g = 0;
-      led[i].b = 0;
-    }
+    memset(led, 0, 3 * RGBLED_NUM);
   }
 
-  i2c_init();
-  i2c_send(0xb0, (uint8_t*)led, 3 * RGBLED_NUM);
+  i2c_transmit(0xb0, (uint8_t*)led, 3 * RGBLED_NUM, 100);
 }
 
 bool rgb_init = false;
@@ -72,26 +45,12 @@ bool rgb_init = false;
 void matrix_scan_kb(void) {
   // if LEDs were previously on before poweroff, turn them back on
   if (rgb_init == false && rgblight_config.enable) {
-    i2c_init();
-    i2c_send(0xb0, (uint8_t*)led, 3 * RGBLED_NUM);
+    i2c_transmit(0xb0, (uint8_t*)led, 3 * RGBLED_NUM, 100);
     rgb_init = true;
   }
 
   rgblight_task();
-#else
-void matrix_scan_kb(void) {
-#endif
   matrix_scan_user();
-  /* Nothing else for now. */
-}
-
-__attribute__((weak)) // overridable
-void matrix_init_user(void) {
-
 }
 
-
-__attribute__((weak)) // overridable
-void matrix_scan_user(void) {
-
-}
+#endif
diff --git a/keyboards/jj40/jj40.h b/keyboards/jj40/jj40.h
index 731f2ff455..fce68eda58 100644
--- a/keyboards/jj40/jj40.h
+++ b/keyboards/jj40/jj40.h
@@ -15,80 +15,68 @@ You should have received a copy of the GNU General Public License
 along with this program.  If not, see <http://www.gnu.org/licenses/>.
 */
 
-#ifndef KEYMAP_COMMON_H
-#define KEYMAP_COMMON_H
+#pragma once
 
 #include "quantum.h"
-#include "quantum_keycodes.h"
-#include "keycode.h"
-#include "action.h"
-
-void matrix_init_user(void);  // TODO port this to other PS2AVRGB boards
-
-#define XXX KC_NO
 
+#define ___ KC_NO
 
 #define LAYOUT_ortho_4x12( \
-    K01, K02, K03, K04, K05, K06, K07, K08, K09, K010, K011, K012, \
-    K11, K12, K13, K14, K15, K16, K17, K18, K19, K110, K111, K112, \
-    K21, K22, K23, K24, K25, K26, K27, K28, K29, K210, K211, K212, \
-    K31, K32, K33, K34, K35, K36, K37, K38, K39, K310, K311, K312  \
+    K00, K01, K02, K03, K04, K05, K06, K07, K08, K09, K0A, K0B, \
+    K10, K11, K12, K13, K14, K15, K16, K17, K18, K19, K1A, K1B, \
+    K20, K21, K22, K23, K24, K25, K26, K27, K28, K29, K2A, K2B, \
+    K30, K31, K32, K33, K34, K35, K36, K37, K38, K39, K3A, K3B  \
 ) \
 { \
-  { K012, K011, K010, K09, K05, K06, K07, K08, K04, K03, K02, K01 }, \
-  { K112, K111, K110, K19, K15, K16, K17, K18, K14, K13, K12, K11 }, \
-  { XXX,  XXX,  XXX,  XXX, XXX, XXX, XXX, XXX, XXX, XXX, XXX, XXX }, \
-  { K212, K211, K210, K29, K25, K26, K27, K28, K24, K23, K22, K21 }, \
-  { K312, K311, K310, K39, K35, K36, K37, K38, K34, K33, K32, K31 }  \
+    { K00, K01, K02, K03, K04, K05, K06, K07, K08, K09, K0A, K0B }, \
+    { K10, K11, K12, K13, K14, K15, K16, K17, K18, K19, K1A, K1B }, \
+    { K20, K21, K22, K23, K24, K25, K26, K27, K28, K29, K2A, K2B }, \
+    { K30, K31, K32, K33, K34, K35, K36, K37, K38, K39, K3A, K3B }  \
 }
 
 
 #define LAYOUT_planck_mit( \
-    K01, K02, K03, K04, K05, K06, K07, K08, K09, K010, K011, K012, \
-    K11, K12, K13, K14, K15, K16, K17, K18, K19, K110, K111, K112, \
-    K21, K22, K23, K24, K25, K26, K27, K28, K29, K210, K211, K212, \
-    K31, K32, K33, K34, K35,    K3X,   K38, K39, K310, K311, K312  \
+    K00, K01, K02, K03, K04, K05, K06, K07, K08, K09, K0A, K0B, \
+    K10, K11, K12, K13, K14, K15, K16, K17, K18, K19, K1A, K1B, \
+    K20, K21, K22, K23, K24, K25, K26, K27, K28, K29, K2A, K2B, \
+    K30, K31, K32, K33, K34,    K3X,   K37, K38, K39, K3A, K3B  \
 ) \
 { \
-  { K012, K011, K010, K09, K05, K06, K07, K08, K04, K03, K02, K01 }, \
-  { K112, K111, K110, K19, K15, K16, K17, K18, K14, K13, K12, K11 }, \
-  { XXX,  XXX,  XXX,  XXX, XXX, XXX, XXX, XXX, XXX, XXX, XXX, XXX }, \
-  { K212, K211, K210, K29, K25, K26, K27, K28, K24, K23, K22, K21 }, \
-  { K312, K311, K310, K39, K35, K3X, XXX, K38, K34, K33, K32, K31 }  \
+    { K00, K01, K02, K03, K04, K05, K06, K07, K08, K09, K0A, K0B }, \
+    { K10, K11, K12, K13, K14, K15, K16, K17, K18, K19, K1A, K1B }, \
+    { K20, K21, K22, K23, K24, K25, K26, K27, K28, K29, K2A, K2B }, \
+    { K30, K31, K32, K33, K34, K3X, ___, K37, K38, K39, K3A, K3B }  \
 }
 
 
 #define LAYOUT_planck_1x2uR( \
-    K01, K02, K03, K04, K05, K06, K07, K08, K09, K010, K011, K012, \
-    K11, K12, K13, K14, K15, K16, K17, K18, K19, K110, K111, K112, \
-    K21, K22, K23, K24, K25, K26, K27, K28, K29, K210, K211, K212, \
-    K31, K32, K33, K34, K35, K36,    K3X,   K39, K310, K311, K312  \
+    K00, K01, K02, K03, K04, K05, K06, K07, K08, K09, K0A, K0B, \
+    K10, K11, K12, K13, K14, K15, K16, K17, K18, K19, K1A, K1B, \
+    K20, K21, K22, K23, K24, K25, K26, K27, K28, K29, K2A, K2B, \
+    K30, K31, K32, K33, K34, K35,   K3X,    K38, K39, K3A, K3B  \
 ) \
 { \
-  { K012, K011, K010, K09, K05, K06, K07, K08, K04, K03, K02, K01 }, \
-  { K112, K111, K110, K19, K15, K16, K17, K18, K14, K13, K12, K11 }, \
-  { XXX,  XXX,  XXX,  XXX, XXX, XXX, XXX, XXX, XXX, XXX, XXX, XXX }, \
-  { K212, K211, K210, K29, K25, K26, K27, K28, K24, K23, K22, K21 }, \
-  { K312, K311, K310, K39, K35, K36, K3X, XXX, K34, K33, K32, K31 }  \
+    { K00, K01, K02, K03, K04, K05, K06, K07, K08, K09, K0A, K0B }, \
+    { K10, K11, K12, K13, K14, K15, K16, K17, K18, K19, K1A, K1B }, \
+    { K20, K21, K22, K23, K24, K25, K26, K27, K28, K29, K2A, K2B }, \
+    { K30, K31, K32, K33, K34, K35, K3X, ___, K38, K39, K3A, K3B }  \
 }
 
 
 #define LAYOUT_kc( \
-	  k00, k01, k02, k03, k04, k05, k06, k07, k08, k09, k0a, k0b, \
-	  k10, k11, k12, k13, k14, k15, k16, k17, k18, k19, k1a, k1b, \
-	  k20, k21, k22, k23, k24, k25, k26, k27, k28, k29, k2a, k2b, \
-	  k30, k31, k32, k33, k34, k35, k36, k37, k38, k39, k3a, k3b  \
-	) \
-	LAYOUT_ortho_4x12( \
-		KC_##k00, KC_##k01, KC_##k02, KC_##k03, KC_##k04, KC_##k05, KC_##k06, KC_##k07, KC_##k08, KC_##k09, KC_##k0a, KC_##k0b, \
-		KC_##k10, KC_##k11, KC_##k12, KC_##k13, KC_##k14, KC_##k15, KC_##k16, KC_##k17, KC_##k18, KC_##k19, KC_##k1a, KC_##k1b, \
-		KC_##k20, KC_##k21, KC_##k22, KC_##k23, KC_##k24, KC_##k25, KC_##k26, KC_##k27, KC_##k28, KC_##k29, KC_##k2a, KC_##k2b, \
-		KC_##k30, KC_##k31, KC_##k32, KC_##k33, KC_##k34, KC_##k35, KC_##k36, KC_##k37, KC_##k38, KC_##k39, KC_##k3a, KC_##k3b  \
+    k00, k01, k02, k03, k04, k05, k06, k07, k08, k09, k0a, k0b, \
+    k10, k11, k12, k13, k14, k15, k16, k17, k18, k19, k1a, k1b, \
+    k20, k21, k22, k23, k24, k25, k26, k27, k28, k29, k2a, k2b, \
+    k30, k31, k32, k33, k34, k35, k36, k37, k38, k39, k3a, k3b  \
+) \
+LAYOUT_ortho_4x12( \
+	KC_##k00, KC_##k01, KC_##k02, KC_##k03, KC_##k04, KC_##k05, KC_##k06, KC_##k07, KC_##k08, KC_##k09, KC_##k0a, KC_##k0b, \
+	KC_##k10, KC_##k11, KC_##k12, KC_##k13, KC_##k14, KC_##k15, KC_##k16, KC_##k17, KC_##k18, KC_##k19, KC_##k1a, KC_##k1b, \
+	KC_##k20, KC_##k21, KC_##k22, KC_##k23, KC_##k24, KC_##k25, KC_##k26, KC_##k27, KC_##k28, KC_##k29, KC_##k2a, KC_##k2b, \
+	KC_##k30, KC_##k31, KC_##k32, KC_##k33, KC_##k34, KC_##k35, KC_##k36, KC_##k37, KC_##k38, KC_##k39, KC_##k3a, KC_##k3b  \
 )
 
 
 #define LAYOUT LAYOUT_planck_mit
-
 #define LAYOUT_kc_ortho_4x12 LAYOUT_kc
-
-#endif
+#define KC_LAYOUT_ortho_4x12 LAYOUT_kc
diff --git a/keyboards/jj40/keymaps/default/keymap.c b/keyboards/jj40/keymaps/default/keymap.c
index d84b01b15a..47c6bada68 100644
--- a/keyboards/jj40/keymaps/default/keymap.c
+++ b/keyboards/jj40/keymaps/default/keymap.c
@@ -1,16 +1,30 @@
+/* Copyright 2019
+ *
+ * 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/>.
+ */
 #include QMK_KEYBOARD_H
 
-
-#define _QWERTY 0
-#define _LOWER  1
-#define _RAISE  2
-
-enum custom_keycodes {
-  QWERTY = SAFE_RANGE,
-  LOWER,
-  RAISE,
+enum layers {
+  _QWERTY = 0,
+  _LOWER,
+  _RAISE,
+  _ADJUST,
 };
 
+#define LOWER  MO(_LOWER)
+#define RAISE  MO(_RAISE)
+
 const uint16_t PROGMEM keymaps[][MATRIX_ROWS][MATRIX_COLS] = {
 /* Qwerty
  * ,-----------------------------------------------------------------------------------.
@@ -27,7 +41,7 @@ const uint16_t PROGMEM keymaps[][MATRIX_ROWS][MATRIX_COLS] = {
   KC_TAB,  KC_Q,    KC_W,    KC_E,    KC_R,    KC_T,    KC_Y,    KC_U,    KC_I,    KC_O,    KC_P,    KC_BSPC, \
   KC_ESC,  KC_A,    KC_S,    KC_D,    KC_F,    KC_G,    KC_H,    KC_J,    KC_K,    KC_L,    KC_SCLN, KC_QUOT, \
   KC_LSFT, KC_Z,    KC_X,    KC_C,    KC_V,    KC_B,    KC_N,    KC_M,    KC_COMM, KC_DOT,  KC_SLSH, KC_ENT , \
-  _______, KC_LCTL, KC_LALT, KC_LGUI, MO(_LOWER),  KC_SPC,  MO(_RAISE),   KC_LEFT, KC_DOWN, KC_UP,   KC_RGHT \
+  _______, KC_LCTL, KC_LALT, KC_LGUI, LOWER,  KC_SPC,   RAISE,   KC_LEFT, KC_DOWN, KC_UP,   KC_RGHT \
 ),
 
 /* Lower
@@ -64,10 +78,27 @@ const uint16_t PROGMEM keymaps[][MATRIX_ROWS][MATRIX_COLS] = {
   KC_DEL,  KC_F1,   KC_F2,   KC_F3,   KC_F4,   KC_F5,   KC_F6,   KC_MINS, KC_EQL,  KC_LBRC, KC_RBRC, KC_BSLS, \
   _______, KC_F7,   KC_F8,   KC_F9,   KC_F10,  KC_F11,  KC_F12,  KC_NUHS, KC_NUBS, _______, _______, _______, \
   _______, _______, _______, _______, _______, _______, _______, KC_MNXT, KC_VOLD, KC_VOLU, KC_MPLY \
+),
+
+/* Adjust (Lower + Raise)
+ * ,-----------------------------------------------------------------------------------.
+ * |      | Reset|      |      |      |      |      |      |      |      |      |  Del |
+ * |------+------+------+------+------+-------------+------+------+------+------+------|
+ * |      |      |      |      |      |      |      |      |      |      |      |      |
+ * |------+------+------+------+------+------|------+------+------+------+------+------|
+ * |      |      |      |      |      |      |      |      |      |      |      |      |
+ * |------+------+------+------+------+------+------+------+------+------+------+------|
+ * |      |      |      |      |      |             |      |      |      |      |      |
+ * `-----------------------------------------------------------------------------------'
+ */
+[_ADJUST] =  LAYOUT_ortho_4x12( \
+  _______, RESET,   _______, _______, _______, _______, _______, _______, _______, _______, _______, KC_DEL, \
+  _______, _______, BL_TOGG, BL_STEP, _______, _______, _______, _______, _______, _______, _______, _______, \
+  _______, _______, RGB_TOG, RGB_MOD, _______, _______, _______, _______, _______, _______, _______, _______, \
+  _______, _______, _______, _______, _______, _______, _______, _______, _______, _______, _______, _______ \
 )
 };
 
-// Loop
-void matrix_scan_user(void) {
-  // Empty
-};
+uint32_t layer_state_set_user(uint32_t state) {
+  return update_tri_layer_state(state, _LOWER, _RAISE, _ADJUST);
+}
diff --git a/keyboards/jj40/matrix.c b/keyboards/jj40/matrix.c
deleted file mode 100644
index 245813dfd2..0000000000
--- a/keyboards/jj40/matrix.c
+++ /dev/null
@@ -1,112 +0,0 @@
-/*
-Copyright 2017 Luiz Ribeiro <luizribeiro@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/>.
-*/
-
-#include <avr/io.h>
-#include <util/delay.h>
-
-#include "matrix.h"
-
-#ifndef DEBOUNCE
-#   define DEBOUNCE	5
-#endif
-
-static uint8_t debouncing = DEBOUNCE;
-
-static matrix_row_t matrix[MATRIX_ROWS];
-static matrix_row_t matrix_debouncing[MATRIX_ROWS];
-
-void matrix_set_row_status(uint8_t row);
-uint8_t bit_reverse(uint8_t x);
-
-void matrix_init(void) {
-    // all outputs for rows high
-    DDRB = 0xFF;
-    PORTB = 0xFF;
-    // all inputs for columns
-    DDRA = 0x00;
-    DDRC &= ~(0x111111<<2);
-    DDRD &= ~(1<<PIND7);
-    // all columns are pulled-up
-    PORTA = 0xFF;
-    PORTC |= (0b111111<<2);
-    PORTD |= (1<<PIND7);
-
-    // initialize matrix state: all keys off
-    for (uint8_t row = 0; row < MATRIX_ROWS; row++) {
-        matrix[row] = 0x00;
-        matrix_debouncing[row] = 0x00;
-    }
-
-    matrix_init_quantum();
-}
-
-uint8_t matrix_scan(void) {
-    for (uint8_t row = 0; row < MATRIX_ROWS; row++) {
-        matrix_set_row_status(row);
-        _delay_us(5);
-
-        matrix_row_t cols = (
-            // cols 0..7, PORTA 0 -> 7
-            (~PINA) & 0xFF
-        ) | (
-            // cols 8..13, PORTC 7 -> 0
-            bit_reverse((~PINC) & 0xFF) << 8
-        ) | (
-            // col 14, PORTD 7
-            ((~PIND) & (1 << PIND7)) << 7
-        );
-
-        if (matrix_debouncing[row] != cols) {
-            matrix_debouncing[row] = cols;
-            debouncing = DEBOUNCE;
-        }
-    }
-
-    if (debouncing) {
-        if (--debouncing) {
-            _delay_ms(1);
-        } else {
-            for (uint8_t i = 0; i < MATRIX_ROWS; i++) {
-                matrix[i] = matrix_debouncing[i];
-            }
-        }
-    }
-