Added YMD75 support (#2968)

* Adding ymd75 files * Added YMD75 support, inc layout json * Added YMD75 support
6 years ago · 2b06623fa0
--- a/keyboards/ymd75/README.md
+++ b/keyboards/ymd75/README.md
@ -0,0 +1,83 @@
 YMD75 / MT84
 ==========================

 This is a port of the QMK firmware for boards that are based on the
 ps2avrGB firmware, like the [ps2avrGB keyboard] (https://www.keyclack.com/product/gb-ps2avrgb/), for use on the YMD75, from YMDK. YMDK sell the board and name it "YMD75", however the PCB has "MT84" printed on both sides.

 Most of the code was taken and amended from YMD96 and my port JJ50, which in itself was taken from ps2avrGB and amended by Andrew Novak.

 Note that this is a complete replacement for the firmware, so you won't be
 using Bootmapper Client to change any keyboard settings, since not all the
 USB report options are supported.  

 Hardware Supported: YMD75/MT84 with the ATmega32a chip.
 Hardware Availability: The YMD75/MT84 PCB is available from YMDK on AliExpress and suchlike.

 This version by Wayne K Jones (github.com/WarmCatUK)

 ## Installing and Building

 Make example for this keyboard (after setting up your build environment):

 ```
 $ make ymd75:default:program
 ```
 It should detect the keyboard and set it to bootloader mode automatically, prior to flashing firmware.
 I've found that I need to remove the previous build/file before making a new one as it doesn't overwrite it; but this might just be my personal experience.

 See [build environment setup](https://docs.qmk.fm/build_environment_setup.html) then the [make instructions](https://docs.qmk.fm/make_instructions.html) for more information.

 Note that this is a complete replacement for the firmware, so you won't be
 using Bootmapper Client to change any keyboard settings, since not all the
 USB report options are supported.
 In addition you may need the AVR toolchain and `bootloadHID` for flashing:

 ```
 $ brew cask install crosspack-avr
 $ brew install --HEAD https://raw.githubusercontent.com/robertgzr/homebrew-tap/master/bootloadhid.rb
 ```

 In order to use the `./program` script, which can reboot the board into
 the bootloader, you'll need Python 2 with PyUSB installed:

 ```
 $ pip install pyusb
 ```

 If you prefer, you can just build it and flash the firmware directly with
 `bootloadHID` if you boot the board while holding down `Left Control` to keep it
 in the bootloader:

 ```
 $ make ymd75
 $ bootloadHID -r ymd75_default.hex
 ```
 I dont use windows personally, but the following is from ymd96 regarding flashing the atmega32a:

 Since the YMD75/MT84 uses an ATmega32a chip instead of the 32u4, you need to download [HIDBootFlash v.1.0](http://vusb.wikidot.com/project:hidbootflash) for Windows. If anyone knows of a Linux/Mac bootflasher that works, edit this readme!
 On Windows, I use [MINGw](http://www.mingw.org/) to compile the keymaps. On Linux or OSX you can simply use the terminal.

 Once you have those two pieces of software:
 Build the keyboard with  
 ```
 $ make ymd75:default
 ```  
 If you make your own layout, change the `default` word to whatever your layout is.  

 And flash the compiled hex file with `HIDBootFlash`. Simply put the board in flashing mode by plugging it in while holding the key below the top right key, and click `find device`. Then you can specify the .hex file and flash it to the device.


 ## Troubleshooting

 1. Try plugging the board in while pressing `Backspace` (`Key below the top right key`). This will force it to boot only the bootloader without loading the firmware. Once this is done, just reflash the board with the original firmware.
 2. Sometimes USB hubs can act weird, so try connecting the board directly to your computer or plugging/unplugging the USB hub.
 3. If you get an error such as "Resource Unavailable" when attemting to flash on Linux, you may want to compile and run `tools/usb_detach.c`. See `tools/README.md` for more info.
 4. I was occasionally finding that I wasn't flashing changes that I was making to my keymap. If that happens, remove the previous build and simply force rebuild by making with:
 ```
 $ rm ymd75_default.hex
 $ make -B ymd75:default
 $ make -B ymd75:default:program
 ```



--- a/keyboards/ymd75/backlight.c
+++ b/keyboards/ymd75/backlight.c
@ -0,0 +1,215 @@
 /**
 * Backlighting code for PS2AVRGB boards (ATMEGA32A)
 * Kenneth A. (github.com/krusli | krusli.me)
 Modified by Wayne K Jones (github.com/WarmCatUK) 2018
 */

 #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 << 2)  // 2nd pin of Port D (digital)
 #define CAPSLOCK_PORT   (1 << 1)  // 1st pin
 #define BACKLIGHT_PORT  (1 << 4)  // 4th pin
 //#define SCROLLLOCK_PORT (1 << 6)  // 6th pin

 #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.
 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
--- a/keyboards/ymd75/backlight_custom.h
+++ b/keyboards/ymd75/backlight_custom.h
@ -0,0 +1,15 @@
 /**
 * 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
--- a/keyboards/ymd75/breathing_custom.h
+++ b/keyboards/ymd75/breathing_custom.h
@ -0,0 +1,140 @@
 /**
 * 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
--- a/keyboards/ymd75/config.h
+++ b/keyboards/ymd75/config.h
@ -0,0 +1,54 @@
 /*
 Base Copyright 2017 Luiz Ribeiro <luizribeiro@gmail.com>
 Modified 2017 Andrew Novak <ndrw.nvk@gmail.com>
 Modified 2018 Wayne Jones (WarmCatUK) <waynekjones@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 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    YMDK
 #define PRODUCT         ymd75 / mt84
 #define DESCRIPTION     75% Keyboard

 /* matrix size */
 #define MATRIX_ROWS 8
 #define MATRIX_COLS 15
 #define DIODE_DIRECTION ROW2COL

 #define BACKLIGHT_LEVELS 12

 #define RGB_DI_PIN E2
 #define RGBLED_NUM 16
 #define RGBLIGHT_ANIMATIONS
 #define RGBLIGHT_HUE_STEP 12
 #define RGBLIGHT_SAT_STEP 15
 #define RGBLIGHT_VAL_STEP 18

 #define NO_UART 1
 #define BOOTLOADHID_BOOTLOADER 1

 /* key combination for command */
 #define IS_COMMAND() (keyboard_report->mods == (MOD_BIT(KC_LSHIFT) | MOD_BIT(KC_RSHIFT)))

 #endif
--- a/keyboards/ymd75/i2c.c
+++ b/keyboards/ymd75/i2c.c
@ -0,0 +1,104 @@
 /*
 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;
 }
--- a/keyboards/ymd75/i2c.h
+++ b/keyboards/ymd75/i2c.h
@ -0,0 +1,25 @@
 /*
 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
--- a/keyboards/ymd75/info.json
+++ b/keyboards/ymd75/info.json
@ -0,0 +1,12 @@
 {
    "keyboard_name": "ymd75",
    "url": "",
    "maintainer": "qmk",
    "width": 16,
    "height": 6,
    "layouts": {
        "LAYOUT": {
            "layout": [{"label":"Esc", "x":0, "y":0}, {"label":"F1", "x":1, "y":0}, {"label":"F2", "x":2, "y":0}, {"label":"F3", "x":3, "y":0}, {"label":"F4", "x":4, "y":0}, {"label":"F5", "x":5, "y":0}, {"label":"F6", "x":6, "y":0}, {"label":"F7", "x":7, "y":0}, {"label":"F8", "x":8, "y":0}, {"label":"F9", "x":9, "y":0}, {"label":"F10", "x":10, "y":0}, {"label":"F11", "x":11, "y":0}, {"label":"F12", "x":12, "y":0}, {"label":"PrtSc", "x":13, "y":0}, {"label":"Del", "x":14, "y":0}, {"label":"Fn", "x":15, "y":0}, {"label":"~", "x":0, "y":1}, {"label":"!", "x":1, "y":1}, {"label":"@", "x":2, "y":1}, {"label":"#", "x":3, "y":1}, {"label":"$", "x":4, "y":1}, {"label":"%", "x":5, "y":1}, {"label":"^", "x":6, "y":1}, {"label":"&", "x":7, "y":1}, {"label":"*", "x":8, "y":1}, {"label":"(", "x":9, "y":1}, {"label":")", "x":10, "y":1}, {"label":"_", "x":11, "y":1}, {"label":"+", "x":12, "y":1}, {"label":"Backspace", "x":13, "y":1, "w":2}, {"label":"Home", "x":15, "y":1}, {"label":"Tab", "x":0, "y":2, "w":1.5}, {"label":"Q", "x":1.5, "y":2}, {"label":"W", "x":2.5, "y":2}, {"label":"E", "x":3.5, "y":2}, {"label":"R", "x":4.5, "y":2}, {"label":"T", "x":5.5, "y":2}, {"label":"Y", "x":6.5, "y":2}, {"label":"U", "x":7.5, "y":2}, {"label":"I", "x":8.5, "y":2}, {"label":"O", "x":9.5, "y":2}, {"label":"P", "x":10.5, "y":2}, {"label":"{", "x":11.5, "y":2}, {"label":"}", "x":12.5, "y":2}, {"label":"|", "x":13.5, "y":2, "w":1.5}, {"label":"End", "x":15, "y":2}, {"label":"Caps Lock", "x":0, "y":3, "w":1.75}, {"label":"A", "x":1.75, "y":3}, {"label":"S", "x":2.75, "y":3}, {"label":"D", "x":3.75, "y":3}, {"label":"F", "x":4.75, "y":3}, {"label":"G", "x":5.75, "y":3}, {"label":"H", "x":6.75, "y":3}, {"label":"J", "x":7.75, "y":3}, {"label":"K", "x":8.75, "y":3}, {"label":"L", "x":9.75, "y":3}, {"label":":", "x":10.75, "y":3}, {"label":"\"", "x":11.75, "y":3}, {"label":"Enter", "x":12.75, "y":3, "w":2.25}, {"label":"Page Up", "x":15, "y":3}, {"label":"Shift", "x":0, "y":4, "w":2.25}, {"label":"Z", "x":2.25, "y":4}, {"label":"X", "x":3.25, "y":4}, {"label":"C", "x":4.25, "y":4}, {"label":"V", "x":5.25, "y":4}, {"label":"B", "x":6.25, "y":4}, {"label":"N", "x":7.25, "y":4}, {"label":"M", "x":8.25, "y":4}, {"label":"<", "x":9.25, "y":4}, {"label":">", "x":10.25, "y":4}, {"label":"?", "x":11.25, "y":4}, {"label":"Shift", "x":12.25, "y":4, "w":1.75}, {"label":"\u2191", "x":14, "y":4}, {"label":"Page Down", "x":15, "y":4}, {"label":"Ctrl", "x":0, "y":5, "w":1.25}, {"label":"GUI", "x":1.25, "y":5, "w":1.25}, {"label":"Alt", "x":2.5, "y":5, "w":1.25}, {"x":3.75, "y":5, "w":6.25}, {"label":"Alt", "x":10, "y":5}, {"label":"Fn", "x":11, "y":5}, {"label":"Ctrl", "x":12, "y":5}, {"label":"\u2190", "x":13, "y":5}, {"label":"\u2193", "x":14, "y":5}, {"label":"\u2192", "x":15, "y":5}]
        }
    }
 }
--- a/keyboards/ymd75/keymaps/default/keymap.c
+++ b/keyboards/ymd75/keymaps/default/keymap.c
@ -0,0 +1,94 @@
 /*
 Copyright 2017 Luiz Ribeiro <luizribeiro@gmail.com>
 Modified 2018 Wayne K Jones <github.com/WarmCatUK>

 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 _MAIN 0
 #define _FN 1

 enum custom_keycodes {
    P_MACRO = SAFE_RANGE
 };

 const uint16_t PROGMEM keymaps[][MATRIX_ROWS][MATRIX_COLS] = {
    
    /* 0: Main Layer
     * ┌─────┬─────┬─────┬─────┬─────┬─────┬─────┬─────┬─────┬─────┬─────┬─────┬─────┬─────┬─────┬─────┐
     * │ ESC │ F1  │ F2  │ F3  │ F4  │ F5  │ F6  │ F7  │ F8  │ F9  │ F10 │ F11 │ F12 │PRSCR│ DEL │ FN  │
     * ├─────┼─────┼─────┼─────┼─────┼─────┼─────┼─────┼─────┼─────┼─────┼─────┼─────┼─────┴─────┼─────┤
     * │  `  │  1  │  2  │  3  │  4  │  5  │  6  │  7  │  8  │  9  │  0  │  -  │  =  │ BACKSPACE │HOME │
     * ├─────┴──┬──┴──┬──┴──┬──┴──┬──┴──┬──┴──┬──┴──┬──┴──┬──┴──┬──┴──┬──┴──┬──┴──┬──┴──┬────────┼─────┤
     * │  TAB   │  Q  │  W  │  E  │  R  │  T  │  Y  │  U  │  I  │  O  │  P  │  [  │  ]  │   \    │ END │
     * ├────────┴┬────┴┬────┴┬────┴┬────┴┬────┴┬────┴┬────┴┬────┴┬────┴┬────┴┬────┴┬────┴────────┼─────┤
     * │  CAPS   │  A  │  S  │  D  │  F  │  G  │  H  │  J  │  K  │  L  │  ;  │  '  │    RETURN   │PG_UP│
     * ├─────────┴──┬──┴──┬──┴──┬──┴──┬──┴──┬──┴──┬──┴──┬──┴──┬──┴──┬──┴──┬──┴──┬──┴───────┬─────┼─────┤
     * │   LSHIFT   │  Z  │  X  │  C  │  V  │  B  │  N  │  M  │  ,  │  .  │  /  │  RSHIFT  │ UP  │PG_DN│
     * ├──────┬─────┴┬────┴─┬───┴─────┴─────┴─────┴─────┴─────┴────┬┴─────┴─┬───┴────┬─────┼─────┼─────┤
     * │LCTRL │L_GUI │L_ALT │                SPACE                 │ R_ALT  │ R_CTRL │LEFT │DOWN │RIGHT│
     * └──────┴──────┴──────┴──────────────────────────────────────┴────────┴────────┴─────┴─────┴─────┘
     */
    [_MAIN] = LAYOUT(
        KC_ESC,   KC_F1,    KC_F2,    KC_F3,    KC_F4,    KC_F5,    KC_F6,    KC_F7,    KC_F8,    KC_F9,    KC_F10,   KC_F11,   KC_F12,   KC_PSCR,  KC_DEL,  MO(_FN),
        KC_GRV,   KC_1,     KC_2,     KC_3,     KC_4,     KC_5,     KC_6,     KC_7,     KC_8,     KC_9,     KC_0,     KC_MINS,  KC_EQL,      KC_BSPC,        KC_HOME,
        KC_TAB,     KC_Q,     KC_W,     KC_E,     KC_R,     KC_T,     KC_Y,     KC_U,     KC_I,     KC_O,     KC_P,     KC_LBRC,  KC_RBRC,    KC_BSLS,       KC_END,
        KC_CAPS,     KC_A,     KC_S,     KC_D,     KC_F,     KC_G,     KC_H,     KC_J,     KC_K,     KC_L,     KC_SCLN  ,KC_QUOT,        KC_ENT,             KC_PGUP,
        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_UP,    KC_PGDN,
        KC_LCTL,  KC_LGUI,  KC_LALT,                  KC_SPC,                                    KC_RALT,  KC_RGUI,  KC_RCTL,          KC_LEFT,   KC_DOWN,   KC_RGHT
    ),
    
    /* 1: Function Layer
     * ┌─────┬─────┬─────┬─────┬─────┬─────┬─────┬─────┬─────┬─────┬─────┬─────┬─────┬─────┬─────┬─────┐
     * │R_TOG│R_MOD│R_HUI│R_SAI│R_VAI│R_HUD│R_SAD│R_VAD│     │     │     │VOL- │VOL+ │     │     │     │
     * ├─────┼─────┼─────┼─────┼─────┼─────┼─────┼─────┼─────┼─────┼─────┼─────┼─────┼─────┴─────┼─────┤
     * │BLTOG│BLINC│BLDEC│  £  │     │     │     │     │     │     │     │     │     │           │     │
     * ├─────┴──┬──┴──┬──┴──┬──┴──┬──┴──┬──┴──┬──┴──┬──┴──┬──┴──┬──┴──┬──┴──┬──┴──┬──┴──┬────────┼─────┤
     * │        │     │     │     │     │     │     │     │     │     │     │     │     │        │     │
     * ├────────┴┬────┴┬────┴┬────┴┬────┴┬────┴┬────┴┬────┴┬────┴┬────┴┬────┴┬────┴┬────┴────────┼─────┤
     * │         │     │     │     │     │     │     │     │     │     │     │     │             │     │
     * ├─────────┴──┬──┴──┬──┴──┬──┴──┬──┴──┬──┴──┬──┴──┬──┴──┬──┴──┬──┴──┬──┴──┬──┴───────┬─────┼─────┤
     * │            │     │     │     │     │     │     │     │     │     │     │          │     │     │
     * ├──────┬─────┴┬────┴─┬───┴─────┴─────┴─────┴─────┴─────┴────┬┴─────┴─┬───┴────┬─────┼─────┼─────┤
     * │      │      │      │                                      │        │        │     │     │     │
     * └──────┴──────┴──────┴──────────────────────────────────────┴────────┴────────┴─────┴─────┴─────┘
     */
    [_FN] = LAYOUT(
        RGB_TOG,  RGB_MOD,  RGB_HUI,  RGB_SAI,  RGB_VAI,  RGB_HUD,  RGB_SAD,  RGB_VAD,  KC_TRNS,  KC_TRNS,  KC_TRNS,  KC_VOLD,  KC_VOLU,  KC_TRNS,  KC_TRNS,  KC_TRNS,
        BL_TOGG,  BL_INC,   BL_DEC,   P_MACRO,  KC_TRNS,  KC_TRNS,  KC_TRNS,  KC_TRNS,  KC_TRNS,  KC_TRNS,  KC_TRNS,  KC_TRNS,  KC_TRNS,  KC_TRNS,            KC_TRNS,
        BL_STEP,  KC_TRNS,  KC_TRNS,  KC_TRNS  ,KC_TRNS,  KC_TRNS,  KC_TRNS,  KC_TRNS,  KC_TRNS,  KC_TRNS,  KC_TRNS,  KC_TRNS,  KC_TRNS,  KC_TRNS,            KC_TRNS,
        KC_TRNS,  KC_TRNS,  KC_TRNS,  KC_TRNS,  KC_TRNS,  KC_TRNS,  KC_TRNS,  KC_TRNS,  KC_TRNS,  KC_TRNS,  KC_TRNS,  KC_TRNS,       KC_TRNS,                 KC_TRNS,
        KC_TRNS,  KC_TRNS,  KC_TRNS,  KC_TRNS,  KC_TRNS,  KC_TRNS,  KC_TRNS,  KC_TRNS,  KC_TRNS,  KC_TRNS,  KC_TRNS,  KC_TRNS,                      KC_TRNS,  KC_TRNS,
        KC_TRNS,  KC_TRNS,  KC_TRNS,                      KC_TRNS,                                KC_TRNS,  KC_TRNS,  KC_TRNS,            KC_TRNS,  KC_TRNS,  KC_TRNS
    ),
 };


 // GBP £ Macro (sends alt 156 - windows users only)
 bool process_record_user(uint16_t keycode, keyrecord_t *record) {
    if (record->event.pressed) {
        switch(keycode) {
            case P_MACRO:
                SEND_STRING(SS_DOWN(X_LALT));
                SEND_STRING(SS_TAP(X_KP_1));
                SEND_STRING(SS_TAP(X_KP_5));
                SEND_STRING(SS_TAP(X_KP_6));
                SEND_STRING(SS_UP(X_LALT));
                return false; break;
        }
    }
    return true;
 };
--- a/keyboards/ymd75/matrix.c
+++ b/keyboards/ymd75/matrix.c
@ -0,0 +1,108 @@
 /*
 Copyright 2017 Luiz Ribeiro <luizribeiro@gmail.com>
 Modified 2018 by Wayne K Jones <github.com/WarmCatUK>

 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_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();  // missing from original port by Luiz
 }

 void matrix_set_row_status(uint8_t row) {
    DDRB = (1 << row);
    PORTB = ~(1 << row);
 }

 uint8_t bit_reverse(uint8_t x) {
    x = ((x >> 1) & 0x55) | ((x << 1) & 0xaa);
    x = ((x >> 2) & 0x33) | ((x << 2) & 0xcc);
    x = ((x >> 4) & 0x0f) | ((x << 4) & 0xf0);
    return x;
 }

 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];
            }
        }
    }
    matrix_scan_quantum();  // also missing in original PS2AVRGB implementation
    //matrix_scan_user();

    return 1;
 }

 inline matrix_row_t matrix_get_row(uint8_t row) {
    return matrix[row];
 }

 void matrix_print(void) {
 }
--- a/keyboards/ymd75/program
+++ b/keyboards/ymd75/program
@ -0,0 +1,74 @@
 #!/usr/bin/env python
 # 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/>.

 from __future__ import print_function

 import os
 import sys
 import time
 import usb

 if len(sys.argv) < 2:
    print('Usage: %s <firmware.hex>' % sys.argv[0])
    sys.exit(1)

 print('Searching for ps2avrGB... ', end='')

 dev = usb.core.find(idVendor=0x20A0, idProduct=0x422D)
 if dev is None:
    raise ValueError('Device not found')

 print('Found', end='\n\n')

 print('Device Information:')
 print('  idVendor: %d (0x%04x)' % (dev.idVendor, dev.idVendor))
 print('  idProduct: %d (0x%04x)' % (dev.idProduct, dev.idProduct))
 print('Manufacturer: %s' % (dev.iManufacturer))
 print('Serial: %s' % (dev.iSerialNumber))
 print('Product: %s' % (dev.iProduct), end='\n\n')

 print('Transferring control to bootloader... ', end='')

 dev.set_configuration()

 request_type = usb.util.build_request_type(
        usb.util.CTRL_OUT,
        usb.util.CTRL_TYPE_CLASS,
        usb.util.CTRL_RECIPIENT_DEVICE)

 USBRQ_HID_SET_REPORT = 0x09
 HID_REPORT_OPTION = 0x0301


 try:
    dev.ctrl_transfer(
            request_type,
            USBRQ_HID_SET_REPORT,
            HID_REPORT_OPTION,
            0,
            [0, 0, 0xFF] + [0] * 5
            )
 except usb.core.USBError:
    # for some reason I keep getting USBError, but it works!
    pass

 # wait a bit until bootloader starts up
 time.sleep(2)

 print('OK')
 print('Programming...')
 if os.system('bootloadHID -r "%s"' % sys.argv[1]) == 0:
    print('\nDone!')
--- a/keyboards/ymd75/rules.mk
+++ b/keyboards/ymd75/rules.mk
@ -0,0 +1,66 @@
 # Copyright 2017 Luiz Ribeiro <luizribeiro@gmail.com>
 # Modified 2018 Wayne Jones (WarmCatUK) <waynekjones@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/>.

 # MCU name
 MCU = atmega32a
 PROTOCOL = VUSB

 # unsupported features for now
 NO_UART = yes
 NO_SUSPEND_POWER_DOWN = yes

 # processor frequency
 F_CPU = 12000000

 # Bootloader
 #     This definition is optional, and if your keyboard supports multiple bootloaders of
 #     different sizes, comment this out, and the correct address will be loaded 
 #     automatically (+60). See bootloader.mk for all options.
 BOOTLOADER = bootloadHID

 # build options
 BOOTMAGIC_ENABLE = yes
 MOUSEKEY_ENABLE = no
 EXTRAKEY_ENABLE = yes
 CONSOLE_ENABLE = no
 COMMAND_ENABLE = yes
 BACKLIGHT_ENABLE = yes
 RGBLIGHT_ENABLE = yes
 RGBLIGHT_CUSTOM_DRIVER = yes
 NKRO_ENABLE = no
 # Nkey Rollover - if this doesn't work, see here: https://github.com/tmk/tmk_keyboard/wiki/FAQ#nkro-doesnt-work


 DISABLE_WS2812 = no

 KEY_LOCK_ENABLE = yes
 # Do not enable SLEEP_LED_ENABLE. it uses the same timer as BACKLIGHT_ENABLE
 SLEEP_LED_ENABLE = no    # Breathing sleep LED during USB suspend


 #OPT_DEFS = -DDEBUG_LEVEL=0

 # custom matrix setup
 CUSTOM_MATRIX = yes
 SRC = matrix.c i2c.c backlight.c

 ifndef QUANTUM_DIR
 	include ../../../../Makefile
 endif


 # programming options
 PROGRAM_CMD = ./keyboards/ps2avrGB/program $(TARGET).hex
--- a/keyboards/ymd75/usbconfig.h
+++ b/keyboards/ymd75/usbconfig.h
@ -0,0 +1,396 @@
 /* Name: usbconfig.h
 * Project: V-USB, virtual USB port for Atmel's(r) AVR(r) microcontrollers
 * Author: Christian Starkjohann
 * Creation Date: 2005-04-01
 * Tabsize: 4
 * Copyright: (c) 2005 by OBJECTIVE DEVELOPMENT Software GmbH
 * License: GNU GPL v2 (see License.txt), GNU GPL v3 or proprietary (CommercialLicense.txt)
 * This Revision: $Id: usbconfig-prototype.h 785 2010-05-30 17:57:07Z cs $
 */

 #ifndef __usbconfig_h_included__
 #define __usbconfig_h_included__

 #include "config.h"

 /*
 General Description:
 This file is an example configuration (with inline documentation) for the USB
 driver. It configures V-USB for USB D+ connected to Port D bit 2 (which is
 also hardware interrupt 0 on many devices) and USB D- to Port D bit 4. You may
 wire the lines to any other port, as long as D+ is also wired to INT0 (or any
 other hardware interrupt, as long as it is the highest level interrupt, see
 section at the end of this file).
 */

 /* ---------------------------- Hardware Config ---------------------------- */

 #define USB_CFG_IOPORTNAME      D
 /* This is the port where the USB bus is connected. When you configure it to
 * "B", the registers PORTB, PINB and DDRB will be used.
 */
 #define USB_CFG_DMINUS_BIT      3
 /* This is the bit number in USB_CFG_IOPORT where the USB D- line is connected.
 * This may be any bit in the port.
 */
 #define USB_CFG_DPLUS_BIT       2
 /* This is the bit number in USB_CFG_IOPORT where the USB D+ line is connected.
 * This may be any bit in the port. Please note that D+ must also be connected
 * to interrupt pin INT0! [You can also use other interrupts, see section
 * "Optional MCU Description" below, or you can connect D- to the interrupt, as
 * it is required if you use the USB_COUNT_SOF feature. If you use D- for the
 * interrupt, the USB interrupt will also be triggered at Start-Of-Frame
 * markers every millisecond.]
 */
 #define USB_CFG_CLOCK_KHZ       (F_CPU/1000)
 /* Clock rate of the AVR in kHz. Legal values are 12000, 12800, 15000, 16000,
 * 16500, 18000 and 20000. The 12.8 MHz and 16.5 MHz versions of the code
 * require no crystal, they tolerate +/- 1% deviation from the nominal
 * frequency. All other rates require a precision of 2000 ppm and thus a
 * crystal!
 * Since F_CPU should be defined to your actual clock rate anyway, you should
 * not need to modify this setting.
 */
 #define USB_CFG_CHECK_CRC       0
 /* Define this to 1 if you want that the driver checks integrity of incoming
 * data packets (CRC checks). CRC checks cost quite a bit of code size and are
 * currently only available for 18 MHz crystal clock. You must choose
 * USB_CFG_CLOCK_KHZ = 18000 if you enable this option.
 */

 /* ----------------------- Optional Hardware Config ------------------------ */

 /* #define USB_CFG_PULLUP_IOPORTNAME   D */
 /* If you connect the 1.5k pullup resistor from D- to a port pin instead of
 * V+, you can connect and disconnect the device from firmware by calling
 * the macros usbDeviceConnect() and usbDeviceDisconnect() (see usbdrv.h).
 * This constant defines the port on which the pullup resistor is connected.
 */
 /* #define USB_CFG_PULLUP_BIT          4 */
 /* This constant defines the bit number in USB_CFG_PULLUP_IOPORT (defined
 * above) where the 1.5k pullup resistor is connected. See description
 * above for details.
 */

 /* --------------------------- Functional Range ---------------------------- */

 #define USB_CFG_HAVE_INTRIN_ENDPOINT    1
 /* Define this to 1 if you want to compile a version with two endpoints: The
 * default control endpoint 0 and an interrupt-in endpoint (any other endpoint
 * number).
 */
 #define USB_CFG_HAVE_INTRIN_ENDPOINT3   1
 /* Define this to 1 if you want to compile a version with three endpoints: The
 * default control endpoint 0, an interrupt-in endpoint 3 (or the number
 * configured below) and a catch-all default interrupt-in endpoint as above.
 * You must also define USB_CFG_HAVE_INTRIN_ENDPOINT to 1 for this feature.
 */
 #define USB_CFG_EP3_NUMBER              3
 /* If the so-called endpoint 3 is used, it can now be configured to any other
 * endpoint number (except 0) with this macro. Default if undefined is 3.
 */
 /* #define USB_INITIAL_DATATOKEN           USBPID_DATA1 */
 /* The above macro defines the startup condition for data toggling on the
 * interrupt/bulk endpoints 1 and 3. Defaults to USBPID_DATA1.
 * Since the token is toggled BEFORE sending any data, the first packet is
 * sent with the oposite value of this configuration!
 */
 #define USB_CFG_IMPLEMENT_HALT          0
 /* Define this to 1 if you also want to implement the ENDPOINT_HALT feature
 * for endpoint 1 (interrupt endpoint). Although you may not need this feature,
 * it is required by the standard. We have made it a config option because it
 * bloats the code considerably.
 */
 #define USB_CFG_SUPPRESS_INTR_CODE      0
 /* Define this to 1 if you want to declare interrupt-in endpoints, but don't
 * want to send any data over them. If this macro is defined to 1, functions
 * usbSetInterrupt() and usbSetInterrupt3() are omitted. This is useful if
 * you need the interrupt-in endpoints in order to comply to an interface
 * (e.g. HID), but never want to send any data. This option saves a couple
 * of bytes in flash memory and the transmit buffers in RAM.
 */
 #define USB_CFG_INTR_POLL_INTERVAL      1
 /* If you compile a version with endpoint 1 (interrupt-in), this is the poll
 * interval. The value is in milliseconds and must not be less than 10 ms for
 * low speed devices.
 */
 #define USB_CFG_IS_SELF_POWERED         0
 /* Define this to 1 if the device has its own power supply. Set it to 0 if the
 * device is powered from the USB bus.
 */
 #define USB_CFG_MAX_BUS_POWER           500
 /* Set this variable to the maximum USB bus power consumption of your device.
 * The value is in milliamperes. [It will be divided by two since USB
 * communicates power requirements in units of 2 mA.]
 */
 #define USB_CFG_IMPLEMENT_FN_WRITE      1
 /* Set this to 1 if you want usbFunctionWrite() to be called for control-out
 * transfers. Set it to 0 if you don't need it and want to save a couple of
 * bytes.
 */
 #define USB_CFG_IMPLEMENT_FN_READ       0
 /* Set this to 1 if you need to send control replies which are generated
 * "on the fly" when usbFunctionRead() is called. If you only want to send
 * data from a static buffer, set it to 0 and return the data from
 * usbFunctionSetup(). This saves a couple of bytes.
 */
 #define USB_CFG_IMPLEMENT_FN_WRITEOUT   0
 /* Define this to 1 if you want to use interrupt-out (or bulk out) endpoints.
 * You must implement the function usbFunctionWriteOut() which receives all
 * interrupt/bulk data sent to any endpoint other than 0. The endpoint number
 * can be found in 'usbRxToken'.
 */
 #define USB_CFG_HAVE_FLOWCONTROL        0
 /* Define this to 1 if you want flowcontrol over USB data. See the definition
 * of the macros usbDisableAllRequests() and usbEnableAllRequests() in
 * usbdrv.h.
 */
 #define USB_CFG_DRIVER_FLASH_PAGE       0
 /* If the device has more than 64 kBytes of flash, define this to the 64 k page
 * where the driver's constants (descriptors) are located. Or in other words:
 * Define this to 1 for boot loaders on the ATMega128.
 */
 #define USB_CFG_LONG_TRANSFERS          0
 /* Define this to 1 if you want to send/receive blocks of more than 254 bytes
 * in a single control-in or control-out transfer. Note that the capability
 * for long transfers increases the driver size.
 */
 /* #define USB_RX_USER_HOOK(data, len)     if(usbRxToken == (uchar)USBPID_SETUP) blinkLED(); */
 /* This macro is a hook if you want to do unconventional things. If it is
 * defined, it's inserted at the beginning of received message processing.
 * If you eat the received message and don't want default processing to
 * proceed, do a return after doing your things. One possible application
 * (besides debugging) is to flash a status LED on each packet.
 */
 /* #define USB_RESET_HOOK(resetStarts)     if(!resetStarts){hadUsbReset();} */
 /* This macro is a hook if you need to know when an USB RESET occurs. It has
 * one parameter which distinguishes between the start of RESET state and its
 * end.
 */
 /* #define USB_SET_ADDRESS_HOOK()              hadAddressAssigned(); */
 /* This macro (if defined) is executed when a USB SET_ADDRESS request was
 * received.
 */
 #define USB_COUNT_SOF                   1
 /* define this macro to 1 if you need the global variable "usbSofCount" which
 * counts SOF packets. This feature requires that the hardware interrupt is
 * connected to D- instead of D+.
 */
 /* #ifdef __ASSEMBLER__
 * macro myAssemblerMacro
 *     in      YL, TCNT0
 *     sts     timer0Snapshot, YL
 *     endm
 * #endif
 * #define USB_SOF_HOOK                    myAssemblerMacro
 * This macro (if defined) is executed in the assembler module when a
 * Start Of Frame condition is detected. It is recommended to define it to
 * the name of an assembler macro which is defined here as well so that more
 * than one assembler instruction can be used. The macro may use the register
 * YL and modify SREG. If it lasts longer than a couple of cycles, USB messages
 * immediately after an SOF pulse may be lost and must be retried by the host.
 * What can you do with this hook? Since the SOF signal occurs exactly every
 * 1 ms (unless the host is in sleep mode), you can use it to tune OSCCAL in
 * designs running on the internal RC oscillator.
 * Please note that Start Of Frame detection works only if D- is wired to the
 * interrupt, not D+. THIS IS DIFFERENT THAN MOST EXAMPLES!
 */
 #define USB_CFG_CHECK_DATA_TOGGLING     0
 /* define this macro to 1 if you want to filter out duplicate data packets
 * sent by the host. Duplicates occur only as a consequence of communication
 * errors, when the host does not receive an ACK. Please note that you need to
 * implement the filtering yourself in usbFunctionWriteOut() and
 * usbFunctionWrite(). Use the global usbCurrentDataToken and a static variable
 * for each control- and out-endpoint to check for duplicate packets.
 */
 #define USB_CFG_HAVE_MEASURE_FRAME_LENGTH   0
 /* define this macro to 1 if you want the function usbMeasureFrameLength()
 * compiled in. This function can be used to calibrate the AVR's RC oscillator.
 */
 #define USB_USE_FAST_CRC                0
 /* The assembler module has two implementations for the CRC algorithm. One is
 * faster, the other is smaller. This CRC routine is only used for transmitted
 * messages where timing is not critical. The faster routine needs 31 cycles
 * per byte while the smaller one needs 61 to 69 cycles. The faster routine
 * may be worth the 32 bytes bigger code size if you transmit lots of data and
 * run the AVR close to its limit.
 */

 /* -------------------------- Device Description --------------------------- */

 #define USB_CFG_VENDOR_ID       (VENDOR_ID & 0xFF), ((VENDOR_ID >> 8) & 0xFF)
 /* USB vendor ID for the device, low byte first. If you have registered your
 * own Vendor ID, define it here. Otherwise you may use one of obdev's free
 * shared VID/PID pairs. Be sure to read USB-IDs-for-free.txt for rules!
 * *** IMPORTANT NOTE ***
 * This template uses obdev's shared VID/PID pair for Vendor Class devices
 * with libusb: 0x16c0/0x5dc.  Use this VID/PID pair ONLY if you understand
 * the implications!
 */
 #define USB_CFG_DEVICE_ID       (PRODUCT_ID & 0xFF), ((PRODUCT_ID >> 8) & 0xFF)
 /* This is the ID of the product, low byte first. It is interpreted in the
 * scope of the vendor ID. If you have registered your own VID with usb.org
 * or if you have licensed a PID from somebody else, define it here. Otherwise
 * you may use one of obdev's free shared VID/PID pairs. See the file
 * USB-IDs-for-free.txt for details!
 * *** IMPORTANT NOTE ***
 * This template uses obdev's shared VID/PID pair for Vendor Class devices
 * with libusb: 0x16c0/0x5dc.  Use this VID/PID pair ONLY if you understand
 * the implications!
 */
 #define USB_CFG_DEVICE_VERSION  0x00, 0x02
 /* Version number of the device: Minor number first, then major number.
 */
 #define USB_CFG_VENDOR_NAME     'Y', 'M', 'D', 'K'
 #define USB_CFG_VENDOR_NAME_LEN 4
 /* These two values define the vendor name returned by the USB device. The name
 * must be given as a list of characters under single quotes. The characters
 * are interpreted as Unicode (UTF-16) entities.
 * If you don't want a vendor name string, undefine these macros.
 * ALWAYS define a vendor name containing your Internet domain name if you use
 * obdev's free shared VID/PID pair. See the file USB-IDs-for-free.txt for
 * details.
 */
 #define USB_CFG_DEVICE_NAME     'Y','M','D','7','5',' ','K','e','y','b','o','a','r','d'
 #define USB_CFG_DEVICE_NAME_LEN 14
 /* Same as above for the device name. If you don't want a device name, undefine
 * the macros. See the file USB-IDs-for-free.txt before you assign a name if
 * you use a shared VID/PID.
 */
 /*#define USB_CFG_SERIAL_NUMBER   'N', 'o', 'n', 'e' */
 /*#define USB_CFG_SERIAL_NUMBER_LEN   0 */
 /* Same as above for the serial number. If you don't want a serial number,
 * undefine the macros.
 * It may be useful to provide the serial number through other means than at
 * compile time. See the section about descriptor properties below for how
 * to fine tune control over USB descriptors such as the string descriptor
 * for the serial number.
 */
 #define USB_CFG_DEVICE_CLASS        0
 #define USB_CFG_DEVICE_SUBCLASS     0
 /* See USB specification if you want to conform to an existing device class.
 * Class 0xff is "vendor specific".
 */
 #define USB_CFG_INTERFACE_CLASS     3   /* HID */
 #define USB_CFG_INTERFACE_SUBCLASS  1   /* Boot */
 #define USB_CFG_INTERFACE_PROTOCOL  1   /* Keyboard */
 /* See USB specification if you want to conform to an existing device class or
 * protocol. The following classes must be set at interface level:
 * HID class is 3, no subclass and protocol required (but may be useful!)
 * CDC class is 2, use subclass 2 and protocol 1 for ACM
 */
 #define USB_CFG_HID_REPORT_DESCRIPTOR_LENGTH    0
 /* Define this to the length of the HID report descriptor, if you implement
 * an HID device. Otherwise don't define it or define it to 0.
 * If you use this define, you must add a PROGMEM character array named
 * "usbHidReportDescriptor" to your code which contains the report descriptor.
 * Don't forget to keep the array and this define in sync!
 */

 /* #define USB_PUBLIC static */
 /* Use the define above if you #include usbdrv.c instead of linking against it.
 * This technique saves a couple of bytes in flash memory.
 */

 /* ------------------- Fine Control over USB Descriptors ------------------- */
 /* If you don't want to use the driver's default USB descriptors, you can
 * provide our own. These can be provided as (1) fixed length static data in
 * flash memory, (2) fixed length static data in RAM or (3) dynamically at
 * runtime in the function usbFunctionDescriptor(). See usbdrv.h for more
 * information about this function.
 * Descriptor handling is configured through the descriptor's properties. If
 * no properties are defined or if they are 0, the default descriptor is used.
 * Possible properties are:
 *   + USB_PROP_IS_DYNAMIC: The data for the descriptor should be fetched
 *     at runtime via usbFunctionDescriptor(). If the usbMsgPtr mechanism is
 *     used, the data is in FLASH by default. Add property USB_PROP_IS_RAM if
 *     you want RAM pointers.
 *   + USB_PROP_IS_RAM: The data returned by usbFunctionDescriptor() or found
 *     in static memory is in RAM, not in flash memory.
 *   + USB_PROP_LENGTH(len): If the data is in static memory (RAM or flash),
 *     the driver must know the descriptor's length. The descriptor itself is
 *     found at the address of a well known identifier (see below).
 * List of static descriptor names (must be declared PROGMEM if in flash):
 *   char usbDescriptorDevice[];
 *   char usbDescriptorConfiguration[];
 *   char usbDescriptorHidReport[];
 *   char usbDescriptorString0[];
 *   int usbDescriptorStringVendor[];
 *   int usbDescriptorStringDevice[];
 *   int usbDescriptorStringSerialNumber[];
 * Other descriptors can't be provided statically, they must be provided
 * dynamically at runtime.
 *
 * Descriptor properties are or-ed or added together, e.g.:
 * #define USB_CFG_DESCR_PROPS_DEVICE   (USB_PROP_IS_RAM | USB_PROP_LENGTH(18))
 *
 * The following descriptors are defined:
 *   USB_CFG_DESCR_PROPS_DEVICE
 *   USB_CFG_DESCR_PROPS_CONFIGURATION
 *   USB_CFG_DESCR_PROPS_STRINGS
 *   USB_CFG_DESCR_PROPS_STRING_0
 *   USB_CFG_DESCR_PROPS_STRING_VENDOR
 *   USB_CFG_DESCR_PROPS_STRING_PRODUCT
 *   USB_CFG_DESCR_PROPS_STRING_SERIAL_NUMBER
 *   USB_CFG_DESCR_PROPS_HID
 *   USB_CFG_DESCR_PROPS_HID_REPORT
 *   USB_CFG_DESCR_PROPS_UNKNOWN (for all descriptors not handled by the driver)
 *
 * Note about string descriptors: String descriptors are not just strings, they
 * are Unicode strings prefixed with a 2 byte header. Example:
 * int  serialNumberDescriptor[] = {
 *     USB_STRING_DESCRIPTOR_HEADER(6),
 *     'S', 'e', 'r', 'i', 'a', 'l'
 * };
 */

 #define USB_CFG_DESCR_PROPS_DEVICE                  0
 #define USB_CFG_DESCR_PROPS_CONFIGURATION           USB_PROP_IS_DYNAMIC
 //#define USB_CFG_DESCR_PROPS_CONFIGURATION           0
 #define USB_CFG_DESCR_PROPS_STRINGS                 0
 #define USB_CFG_DESCR_PROPS_STRING_0                0
 #define USB_CFG_DESCR_PROPS_STRING_VENDOR           0
 #define USB_CFG_DESCR_PROPS_STRING_PRODUCT          0
 #define USB_CFG_DESCR_PROPS_STRING_SERIAL_NUMBER    0
 #define USB_CFG_DESCR_PROPS_HID                     USB_PROP_IS_DYNAMIC
 //#define USB_CFG_DESCR_PROPS_HID                     0
 #define USB_CFG_DESCR_PROPS_HID_REPORT              USB_PROP_IS_DYNAMIC
 //#define USB_CFG_DESCR_PROPS_HID_REPORT              0
 #define USB_CFG_DESCR_PROPS_UNKNOWN                 0

 #define usbMsgPtr_t unsigned short
 /* If usbMsgPtr_t is not defined, it defaults to 'uchar *'. We define it to
 * a scalar type here because gcc generates slightly shorter code for scalar
 * arithmetics than for pointer arithmetics. Remove this define for backward
 * type compatibility or define it to an 8 bit type if you use data in RAM only
 * and all RAM is below 256 bytes (tiny memory model in IAR CC).
 */

 /* ----------------------- Optional MCU Description ------------------------ */

 /* The following configurations have working defaults in usbdrv.h. You
 * usually don't need to set them explicitly. Only if you want to run
 * the driver on a device which is not yet supported or with a compiler
 * which is not fully supported (such as IAR C) or if you use a differnt
 * interrupt than INT0, you may have to define some of these.
 */
 /* #define USB_INTR_CFG            MCUCR */
 /* #define USB_INTR_CFG_SET        ((1 << ISC00) | (1 << ISC01)) */
 /* #define USB_INTR_CFG_CLR        0 */
 /* #define USB_INTR_ENABLE         GIMSK */
 /* #define USB_INTR_ENABLE_BIT     INT0 */
 /* #define USB_INTR_PENDING        GIFR */
 /* #define USB_INTR_PENDING_BIT    INTF0 */
 /* #define USB_INTR_VECTOR         INT0_vect */

 /* Set INT1 for D- falling edge to count SOF */
 /* #define USB_INTR_CFG            EICRA */
 #define USB_INTR_CFG_SET        ((1 << ISC11) | (0 << ISC10))
 /* #define USB_INTR_CFG_CLR        0 */
 /* #define USB_INTR_ENABLE         EIMSK */
 #define USB_INTR_ENABLE_BIT     INT1
 /* #define USB_INTR_PENDING        EIFR */
 #define USB_INTR_PENDING_BIT    INTF1
 #define USB_INTR_VECTOR         INT1_vect

 #endif /* __usbconfig_h_included__ */
--- a/keyboards/ymd75/ymd75.c
+++ b/keyboards/ymd75/ymd75.c
@ -0,0 +1,95 @@
 /*
 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 "ymd75.h"
 //#include "rgblight.h"

 #include <avr/pgmspace.h>

 #include "action_layer.h"
 #include "i2c.h"
 #include "quantum.h"

 #include "backlight.h"
 #include "backlight_custom.h"

 // for keyboard subdirectory level init functions
 // @Override
 void matrix_init_kb(void) {
    // 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;
        }
    }
    
    i2c_init();
    i2c_send(0xb0, (uint8_t*)led, 3 * RGBLED_NUM);
 }

 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);
        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) {
        
    }
--- a/keyboards/ymd75/ymd75.h
+++ b/keyboards/ymd75/ymd75.h
@ -0,0 +1,57 @@
 /*
 Base Copyright 2017 Luiz Ribeiro <luizribeiro@gmail.com>
 Modified 2017 Andrew Novak <ndrw.nvk@gmail.com>
 Modified 2018 Wayne Jones (WarmCatUK) <waynekjones@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 KEYMAP_COMMON_H
 #define KEYMAP_COMMON_H

 #include "quantum.h"
 #include "quantum_keycodes.h"
 #include "keycode.h"
 #include "action.h"

 void matrix_init_user(void);

 #define LAYOUT( \
 K05, K25, K35, K45, K55, K06, KA6, KA7, K07, KB5, KC5, KD5, KE5, KD1, KE1, KE2, \
 K04, K14, K24, K34, K44, K54, K16, KB6, KB7, K17, KA4, KB4, KC4, KE4,      KD0, \
 K03, K13, K23, K33, K43, K53, K26, KC6, KC7, K27, KA3, KB3, KC3, KD3,      K67, \
 K02, K12, K22, K32, K42, K52, K36, KD6, KD7, K37, KA2, KB2, KD2,           KE0, \
 K01, K11, K21, K31, K41, K51, K46, KE6, KE7, K47, KA1, KB1,           K86, K77, \
 K00, K10, K20,           K56,                     K57, KB0, KC0, K96, K76, K66  \
 ){ \
 { K00, K10,   K20, KC_NO, KC_NO, KC_NO, KC_NO, KC_NO, KC_NO, KC_NO, KC_NO, KB0, KC0,   KD0,   KC_NO }, \
 { K01, K11,   K21, K31,   K41,   K51,   KC_NO, KC_NO, KC_NO, KC_NO, KA1,   KB1, KC_NO, KD1,   KE1   }, \
 { K02, K12,   K22, K32,   K42,   K52,   KC_NO, KC_NO, KC_NO, KC_NO, KA2,   KB2, KC_NO, KD2,   KE2   }, \
 { K03, K13,   K23, K33,   K43,   K53,   KC_NO, KC_NO, KC_NO, KC_NO, KA3,   KB3, KC3,   KD3,   KC_NO }, \
 { K04, K14,   K24, K34,   K44,   K54,   KC_NO, KC_NO, KC_NO, KC_NO, KA4,   KB4, KC4,   KC_NO, KE4   }, \
 { K05, KC_NO, K25, K35,   K45,   K55,   KC_NO, KC_NO, KC_NO, KC_NO, KC_NO, KB5, KC5,   KD5,   KE5   }, \
 { K06, K16,   K26, K36,   K46,   K56,   K66,   K76,   K86,   K96,   KA6,   KB6, KC6,   KD6,   KE6   }, \
 { K07, K17,   K27, K37,   K47,   K57,   K67,   K77,   KE0,   KC_NO, KA7,   KB7, KC7,   KD7,   KE7   } \
 }

 #endif