[Keyboard] Initial support for TKC M0LLY (#5087)

* Initial support for TKC M0LLY

* Remove depreciated Magic Keys define

* Update keyboards/m0lly/README.md

Co-Authored-By: TerryMathews <terry@terrymathews.net>

* Update keyboards/m0lly/README.md

Co-Authored-By: TerryMathews <terry@terrymathews.net>

* Update keyboards/m0lly/info.json

Co-Authored-By: TerryMathews <terry@terrymathews.net>

* Update keyboards/m0lly/info.json

Co-Authored-By: TerryMathews <terry@terrymathews.net>

* Update keyboards/m0lly/m0lly.h

Co-Authored-By: TerryMathews <terry@terrymathews.net>

* Suggested review changes

keyboards/m0lly/README.md

@@ -0,0 +1,17 @@
+The Key Company M0LLY
+
+[TKC M0LLY](https://cdn.shopify.com/s/files/1/1679/2319/files/Molly_Terminal_1024x1024.jpg?v=1529067702)
+
+
+The Key Company's M0LLY keyboard is inspired by the Apple Macintosh M0110A, and utilizes the AT90USB1286 microcontroller.
+
+Keyboard Maintainer: [Terry Mathews](https://github.com/TerryMathews/)  
+Hardware Supported: TKC M0LLY  
+Hardware Availability: [TheKey.Company](https://thekey.company) 
+
+
+Make example for this keyboard (after setting up your build environment):
+
+    make m0lly:default
+
+See the [build environment setup](https://docs.qmk.fm/#/getting_started_build_tools) and the [make instructions](https://docs.qmk.fm/#/getting_started_make_guide) for more information. Brand new to QMK? Start with our [Complete Newbs Guide](https://docs.qmk.fm/#/newbs).

keyboards/m0lly/config.h

@@ -0,0 +1,178 @@
+/*
+Copyright 2012 Jun Wako <wakojun@gmail.com>
+
+This program is free software: you can redistribute it and/or modify
+it under the terms of the GNU General Public License as published by
+the Free Software Foundation, either version 2 of the License, or
+(at your option) any later version.
+
+This program is distributed in the hope that it will be useful,
+but WITHOUT ANY WARRANTY; without even the implied warranty of
+MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+GNU General Public License for more details.
+
+You should have received a copy of the GNU General Public License
+along with this program.  If not, see <http://www.gnu.org/licenses/>.
+*/
+
+#pragma once
+
+#include "config_common.h"
+
+/* USB Device descriptor parameter */
+#define VENDOR_ID       0xFEED
+#define PRODUCT_ID      0x6060
+#define DEVICE_VER      0x0003
+#define MANUFACTURER    The Key Company
+#define PRODUCT         M0lly
+#define DESCRIPTION     QMK keyboard firmware for M0lly
+
+/* key matrix size */
+#define MATRIX_ROWS 5
+#define MATRIX_COLS 19
+
+// ROWS: Top to bottom, COLS: Left to right
+/* Row pin configuration
+*/
+#define MATRIX_ROW_PINS { F2, F1, F0, E1, E0 }
+/* Column pin configuration
+ */
+#define MATRIX_COL_PINS { A0, A1, A2, A3, A4, A5, A6, A7, C7, C6, C5, C4, C3, C2, C1, C0, F5, F6, F7 }
+#define UNUSED_PINS
+
+/* COL2ROW or ROW2COL */
+#define DIODE_DIRECTION COL2ROW
+
+#define BACKLIGHT_PIN B6
+#define BACKLIGHT_BREATHING
+#define BACKLIGHT_LEVELS 3
+
+/* Underlight configuration
+ */
+#define RGB_DI_PIN D7
+#define RGBLIGHT_ANIMATIONS
+#define RGBLED_NUM 30     // Number of LEDs
+#define RGBLIGHT_HUE_STEP 5
+#define RGBLIGHT_SAT_STEP 10
+#define RGBLIGHT_VAL_STEP 10
+
+/* define if matrix has ghost */
+//#define MATRIX_HAS_GHOST
+
+/* Set 0 if debouncing isn't needed */
+#define DEBOUNCING_DELAY 5
+
+/* Mechanical locking support. Use KC_LCAP, KC_LNUM or KC_LSCR instead in keymap */
+#define LOCKING_SUPPORT_ENABLE
+/* Locking resynchronize hack */
+#define LOCKING_RESYNC_ENABLE
+
+/*
+ * Force NKRO
+ *
+ * Force NKRO (nKey Rollover) to be enabled by default, regardless of the saved
+ * state in the bootmagic EEPROM settings. (Note that NKRO must be enabled in the
+ * makefile for this to work.)
+ *
+ * If forced on, NKRO can be disabled via magic key (default = LShift+RShift+N)
+ * until the next keyboard reset.
+ *
+ * NKRO may prevent your keystrokes from being detected in the BIOS, but it is
+ * fully operational during normal computer usage.
+ *
+ * For a less heavy-handed approach, enable NKRO via magic key (LShift+RShift+N)
+ * or via bootmagic (hold SPACE+N while plugging in the keyboard). Once set by
+ * bootmagic, NKRO mode will always be enabled until it is toggled again during a
+ * power-up.
+ *
+ */
+//#define FORCE_NKRO
+
+/*
+ * Magic Key Options
+ *
+ * Magic keys are hotkey commands that allow control over firmware functions of
+ * the keyboard. They are best used in combination with the HID Listen program,
+ * found here: https://www.pjrc.com/teensy/hid_listen.html
+ *
+ * The options below allow the magic key functionality to be changed. This is
+ * useful if your keyboard/keypad is missing keys and you want magic key support.
+ *
+ */
+
+/* control how magic key switches layers */
+//#define MAGIC_KEY_SWITCH_LAYER_WITH_FKEYS  true
+//#define MAGIC_KEY_SWITCH_LAYER_WITH_NKEYS  true
+//#define MAGIC_KEY_SWITCH_LAYER_WITH_CUSTOM false
+
+/* override magic key keymap */
+//#define MAGIC_KEY_SWITCH_LAYER_WITH_FKEYS
+//#define MAGIC_KEY_SWITCH_LAYER_WITH_NKEYS
+//#define MAGIC_KEY_SWITCH_LAYER_WITH_CUSTOM
+//#define MAGIC_KEY_HELP1          H
+//#define MAGIC_KEY_HELP2          SLASH
+//#define MAGIC_KEY_DEBUG          D
+//#define MAGIC_KEY_DEBUG_MATRIX   X
+//#define MAGIC_KEY_DEBUG_KBD      K
+//#define MAGIC_KEY_DEBUG_MOUSE    M
+//#define MAGIC_KEY_VERSION        V
+//#define MAGIC_KEY_STATUS         S
+//#define MAGIC_KEY_CONSOLE        C
+//#define MAGIC_KEY_LAYER0_ALT1    ESC
+//#define MAGIC_KEY_LAYER0_ALT2    GRAVE
+//#define MAGIC_KEY_LAYER0         0
+//#define MAGIC_KEY_LAYER1         1
+//#define MAGIC_KEY_LAYER2         2
+//#define MAGIC_KEY_LAYER3         3
+//#define MAGIC_KEY_LAYER4         4
+//#define MAGIC_KEY_LAYER5         5
+//#define MAGIC_KEY_LAYER6         6
+//#define MAGIC_KEY_LAYER7         7
+//#define MAGIC_KEY_LAYER8         8
+//#define MAGIC_KEY_LAYER9         9
+//#define MAGIC_KEY_BOOTLOADER     PAUSE
+//#define MAGIC_KEY_LOCK           CAPS
+//#define MAGIC_KEY_EEPROM         E
+//#define MAGIC_KEY_NKRO           N
+//#define MAGIC_KEY_SLEEP_LED      Z
+
+/*
+ * Feature disable options
+ *  These options are also useful to firmware size reduction.
+ */
+
+/* disable debug print */
+//#define NO_DEBUG
+
+/* disable print */
+//#define NO_PRINT
+
+/* disable action features */
+//#define NO_ACTION_LAYER
+//#define NO_ACTION_TAPPING
+//#define NO_ACTION_ONESHOT
+//#define NO_ACTION_MACRO
+//#define NO_ACTION_FUNCTION
+
+/*
+ * MIDI options
+ */
+
+/* Prevent use of disabled MIDI features in the keymap */
+//#define MIDI_ENABLE_STRICT 1
+
+/* enable basic MIDI features:
+   - MIDI notes can be sent when in Music mode is on
+*/
+//#define MIDI_BASIC
+
+/* enable advanced MIDI features:
+   - MIDI notes can be added to the keymap
+   - Octave shift and transpose
+   - Virtual sustain, portamento, and modulation wheel
+   - etc.
+*/
+//#define MIDI_ADVANCED
+
+/* override number of MIDI tone keycodes (each octave adds 12 keycodes and allocates 12 bytes) */
+//#define MIDI_TONE_KEYCODE_OCTAVES 1

keyboards/m0lly/i2c.c

@@ -0,0 +1,166 @@
+#include <util/twi.h>
+#include <avr/io.h>
+#include <stdlib.h>
+#include <avr/interrupt.h>
+#include <util/twi.h>
+#include <stdbool.h>
+#include "i2c.h"
+
+#ifdef USE_I2C
+
+// Limits the amount of we wait for any one i2c transaction.
+// Since were running SCL line 100kHz (=> 10μs/bit), and each transactions is
+// 9 bits, a single transaction will take around 90μs to complete.
+//
+// (F_CPU/SCL_CLOCK)  =>  # of μC cycles to transfer a bit
+// poll loop takes at least 8 clock cycles to execute
+#define I2C_LOOP_TIMEOUT (9+1)*(F_CPU/SCL_CLOCK)/8
+
+#define BUFFER_POS_INC() (slave_buffer_pos = (slave_buffer_pos+1)%SLAVE_BUFFER_SIZE)
+
+volatile uint8_t i2c_slave_buffer[SLAVE_BUFFER_SIZE];
+
+static volatile uint8_t slave_buffer_pos;
+static volatile bool slave_has_register_set = false;
+
+// Wait for an i2c operation to finish
+inline static
+void i2c_delay(void) {
+  uint16_t lim = 0;
+  while(!(TWCR & (1<<TWINT)) && lim < I2C_LOOP_TIMEOUT)
+    lim++;
+
+  // easier way, but will wait slightly longer
+  // _delay_us(100);
+}
+
+// Setup twi to run at 100kHz
+void i2c_master_init(void) {
+  // no prescaler
+  TWSR = 0;
+  // Set TWI clock frequency to SCL_CLOCK. Need TWBR>10.
+  // Check datasheets for more info.
+  TWBR = ((F_CPU/SCL_CLOCK)-16)/2;
+}
+
+// Start a transaction with the given i2c slave address. The direction of the
+// transfer is set with I2C_READ and I2C_WRITE.
+// returns: 0 => success
+//          1 => error
+uint8_t i2c_master_start(uint8_t address) {
+  TWCR = (1<<TWINT) | (1<<TWSTA) | (1<<TWEN);
+
+  i2c_delay();
+
+  // check that we started successfully
+  if ( (TW_STATUS != TW_START) && (TW_STATUS != TW_REP_START))
+    return 1;
+
+  // send device address
+  TWDR = address;
+  TWCR = (1<<TWINT) | (1<<TWEN);
+
+  i2c_delay();
+
+  if ( (TW_STATUS != TW_MT_SLA_ACK) && (TW_STATUS != TW_MR_SLA_ACK) )
+    return 1; // slave did not acknowledge
+  else
+    return 0; // success
+}
+
+
+// Finish the i2c transaction.
+void i2c_master_stop(void) {
+  TWCR = (1<<TWINT) | (1<<TWEN) | (1<<TWSTO);
+
+  uint16_t lim = 0;
+  while(!(TWCR & (1<<TWSTO)) && lim < I2C_LOOP_TIMEOUT)
+    lim++;
+}
+
+// Write one byte to the i2c slave.
+// returns 0 => slave ACK
+//         1 => slave NACK
+uint8_t i2c_master_write(uint8_t data) {
+  TWDR = data;
+  TWCR = (1<<TWINT) | (1<<TWEN);
+
+  i2c_delay();
+
+  // check if the slave acknowledged us
+  return (TW_STATUS == TW_MT_DATA_ACK) ? 0 : 1;
+}
+
+// Read one byte from the i2c slave. If ack=1 the slave is acknowledged,
+// if ack=0 the acknowledge bit is not set.
+// returns: byte read from i2c device
+uint8_t i2c_master_read(int ack) {
+  TWCR = (1<<TWINT) | (1<<TWEN) | (ack<<TWEA);
+
+  i2c_delay();
+  return TWDR;
+}
+
+void i2c_reset_state(void) {
+  TWCR = 0;
+}
+
+void i2c_slave_init(uint8_t address) {
+  TWAR = address << 0; // slave i2c address
+  // TWEN  - twi enable
+  // TWEA  - enable address acknowledgement
+  // TWINT - twi interrupt flag
+  // TWIE  - enable the twi interrupt
+  TWCR = (1<<TWIE) | (1<<TWEA) | (1<<TWINT) | (1<<TWEN);
+}
+
+ISR(TWI_vect);
+
+ISR(TWI_vect) {
+  uint8_t ack = 1;
+  switch(TW_STATUS) {
+    case TW_SR_SLA_ACK:
+      // this device has been addressed as a slave receiver
+      slave_has_register_set = false;
+      break;
+
+    case TW_SR_DATA_ACK:
+      // this device has received data as a slave receiver
+      // The first byte that we receive in this transaction sets the location
+      // of the read/write location of the slaves memory that it exposes over
+      // i2c.  After that, bytes will be written at slave_buffer_pos, incrementing
+      // slave_buffer_pos after each write.
+      if(!slave_has_register_set) {
+        slave_buffer_pos = TWDR;
+        // don't acknowledge the master if this memory loctaion is out of bounds
+        if ( slave_buffer_pos >= SLAVE_BUFFER_SIZE ) {
+          ack = 0;
+          slave_buffer_pos = 0;
+        }
+        slave_has_register_set = true;
+      } else {
+        i2c_slave_buffer[slave_buffer_pos] = TWDR;
+        BUFFER_POS_INC();
+      }
+      break;
+
+    case TW_ST_SLA_ACK:
+    case TW_ST_DATA_ACK:
+      // master has addressed this device as a slave transmitter and is
+      // requesting data.
+      TWDR = i2c_slave_buffer[slave_buffer_pos];
+      BUFFER_POS_INC();
+      break;
+
+    case TW_BUS_ERROR: // something went wrong, reset twi state
+      TWCR = 0;
+    default:
+      break;
+  }
+  // Reset everything, so we are ready for the next TWI interrupt
+  TWCR |= (1<<TWIE) | (1<<TWINT) | (ack<<TWEA) | (1<<TWEN);
+}
+
+
+
+#endif

keyboards/m0lly/i2c.h

@@ -0,0 +1,49 @@
+#ifndef I2C_H
+#define I2C_H
+
+#include <stdint.h>
+
+#ifndef F_CPU
+#define F_CPU 16000000UL
+#endif
+
+#define I2C_READ 1
+#define I2C_WRITE 0
+
+#define I2C_ACK 1
+#define I2C_NACK 0
+
+#define SLAVE_BUFFER_SIZE 0x10
+
+// i2c SCL clock frequency
+#define SCL_CLOCK  800000L
+
+extern volatile uint8_t i2c_slave_buffer[SLAVE_BUFFER_SIZE];
+
+void i2c_master_init(void);
+uint8_t i2c_master_start(uint8_t address);
+void i2c_master_stop(void);
+uint8_t i2c_master_write(uint8_t data);
+uint8_t i2c_master_read(int);
+void i2c_reset_state(void);
+void i2c_slave_init(uint8_t address);
+
+
+static inline unsigned char i2c_start_read(unsigned char addr) {
+  return i2c_master_start((addr << 1) | I2C_READ);
+}
+
+static inline unsigned char i2c_start_write(unsigned char addr) {
+  return i2c_master_start((addr << 1) | I2C_WRITE);
+}
+
+// from SSD1306 scrips
+extern unsigned char i2c_rep_start(unsigned char addr);
+extern void i2c_start_wait(unsigned char addr);
+extern unsigned char i2c_readAck(void);
+extern unsigned char i2c_readNak(void);
+extern unsigned char i2c_read(unsigned char ack);
+
+#define i2c_read(ack)  (ack) ? i2c_readAck() : i2c_readNak();
+
+#endif

keyboards/m0lly/info.json

@@ -0,0 +1,97 @@
+{
+    "keyboard_name": "TKC M0LLY", 
+    "url": "", 
+    "maintainer": "qmk", 
+    "width": 19.5, 
+    "height": 5, 
+    "layouts": {
+        "LAYOUT_all": {
+            "layout": [
+				{"label":"~", "x":0, "y":0},
+				{"label":"!", "x":1, "y":0},
+				{"label":"@", "x":2, "y":0},
+				{"label":"#", "x":3, "y":0},
+				{"label":"$", "x":4, "y":0},
+				{"label":"%", "x":5, "y":0},
+				{"label":"^", "x":6, "y":0},
+				{"label":"&", "x":7, "y":0},
+				{"label":"*", "x":8, "y":0},
+				{"label":"(", "x":9, "y":0},
+				{"label":")", "x":10, "y":0},
+				{"label":"_", "x":11, "y":0},
+				{"label":"+", "x":12, "y":0},
+				{"label":"Bksp", "x":13, "y":0},
+				{"x":14, "y":0},
+				{"label":"Num", "x":15.5, "y":0},
+				{"label":"/", "x":16.5, "y":0},
+				{"label":"*", "x":17.5, "y":0},
+				{"label":"-", "x":18.5, "y":0},
+				{"label":"Tab", "x":0, "y":1, "w":1.5},
+				{"label":"Q", "x":1.5, "y":1},
+				{"label":"W", "x":2.5, "y":1},
+				{"label":"E", "x":3.5, "y":1},
+				{"label":"R", "x":4.5, "y":1},
+				{"label":"T", "x":5.5, "y":1},
+				{"label":"Y", "x":6.5, "y":1},
+				{"label":"U", "x":7.5, "y":1},
+				{"label":"I", "x":8.5, "y":1},
+				{"label":"O", "x":9.5, "y":1},
+				{"label":"P", "x":10.5, "y":1},
+				{"label":"{", "x":11.5, "y":1},
+				{"label":"}", "x":12.5, "y":1},
+				{"label":"|", "x":13.5, "y":1, "w":1.5},
+				{"label":"7", "x":15.5, "y":1},
+				{"label":"8", "x":16.5, "y":1},
+				{"label":"9", "x":17.5, "y":1},
+				{"x":18.5, "y":1},
+				{"label":"Caps Lock", "x":0, "y":2, "w":1.75},
+				{"label":"A", "x":1.75, "y":2},
+				{"label":"S", "x":2.75, "y":2},
+				{"label":"D", "x":3.75, "y":2},
+				{"label":"F", "x":4.75, "y":2},
+				{"label":"G", "x":5.75, "y":2},
+				{"label":"H", "x":6.75, "y":2},
+				{"label":"J", "x":7.75, "y":2},
+				{"label":"K", "x":8.75, "y":2},
+				{"label":"L", "x":9.75, "y":2},
+				{"label":":", "x":10.75, "y":2},
+				{"label":"\"", "x":11.75, "y":2},
+				{"label":"ISO ~", "x":12.75, "y":2},
+				{"label":"Enter", "x":13.75, "y":2, "w":1.25},
+				{"label":"4", "x":15.5, "y":2},
+				{"label":"5", "x":16.5, "y":2},
+				{"label":"6", "x":17.5, "y":2},
+				{"label":"+", "x":18.5, "y":2},
+				{"label":"Shift", "x":0, "y":3, "w":1.25},
+				{"x":1.25, "y":3},
+				{"label":"Z", "x":2.25, "y":3},
+				{"label":"X", "x":3.25, "y":3},
+				{"label":"C", "x":4.25, "y":3},
+				{"label":"V", "x":5.25, "y":3},
+				{"label":"B", "x":6.25, "y":3},
+				{"label":"N", "x":7.25, "y":3},
+				{"label":"M", "x":8.25, "y":3},
+				{"label":"<", "x":9.25, "y":3},
+				{"label":">", "x":10.25, "y":3},
+				{"label":"?", "x":11.25, "y":3},
+				{"label":"Shift", "x":12.25, "y":3, "w":1.75},
+				{"x":14, "y":3},
+				{"label":"1", "x":15.5, "y":3},
+				{"label":"2", "x":16.5, "y":3},
+				{"label":"3", "x":17.5, "y":3},
+				{"x":18.5, "y":3},
+				{"label":"Ctrl", "x":0, "y":4, "w":1.25},
+				{"label":"Win", "x":1.25, "y":4, "w":1.25},
+				{"label":"Alt", "x":2.5, "y":4, "w":1.25},
+				{"x":3.75, "y":4, "w":6.25},
+				{"label":"Alt", "x":10, "y":4, "w":1.25},
+				{"label":"Win", "x":11.25, "y":4, "w":1.25},
+				{"label":"FN", "x":12.5, "y":4, "w":1.25},
+				{"label":"Ctrl", "x":13.75, "y":4, "w":1.25},
+				{"label":"0", "x":15.5, "y":4},
+				{"x":16.5, "y":4},
+				{"label":".", "x":17.5, "y":4},
+				{"label":"Ent", "x":18.5, "y":4}]
+        }
+    }
+}

keyboards/m0lly/keymaps/default/config.h

@@ -0,0 +1,24 @@
+/* Copyright 2017 Mathias Andersson <wraul@dbox.se>
+ *
+ * This program is free software: you can redistribute it and/or modify
+ * it under the terms of the GNU General Public License as published by
+ * the Free Software Foundation, either version 2 of the License, or
+ * (at your option) any later version.
+ *
+ * This program is distributed in the hope that it will be useful,
+ * but WITHOUT ANY WARRANTY; without even the implied warranty of
+ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+ * GNU General Public License for more details.
+ *
+ * You should have received a copy of the GNU General Public License
+ * along with this program.  If not, see <http://www.gnu.org/licenses/>.
+ */
+
+#pragma once
+
+#define USE_I2C
+#define SSD1306OLED
+//#define OLED_ROTATE180
+#define SSD1306_ADDRESS 0x3C
+
+// place overrides here

keyboards/m0lly/keymaps/default/keymap.c

@@ -0,0 +1,149 @@
+/* Copyright 2017 Mathias Andersson <wraul@dbox.se>
+ *
+ * This program is free software: you can redistribute it and/or modify
+ * it under the terms of the GNU General Public License as published by
+ * the Free Software Foundation, either version 2 of the License, or
+ * (at your option) any later version.
+ *
+ * This program is distributed in the hope that it will be useful,
+ * but WITHOUT ANY WARRANTY; without even the implied warranty of
+ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+ * GNU General Public License for more details.
+ *
+ * You should have received a copy of the GNU General Public License
+ * along with this program.  If not, see <http://www.gnu.org/licenses/>.
+ */
+#include QMK_KEYBOARD_H
+#include "LUFA/Drivers/Peripheral/TWI.h"
+#include "i2c.h"
+#include "ssd1306.h"
+
+
+//Layers
+
+enum {
+  BASE = 0,
+  FUNCTION,
+};
+
+bool screenWorks = 0;
+
+//13 characters max without re-writing the "Layer: " format in iota_gfx_task_user()
+static char layer_lookup[][14] = {"Base","Function"};
+
+
+
+const uint16_t PROGMEM keymaps[][MATRIX_ROWS][MATRIX_COLS] = {
+  /* Keymap BASE: (Base Layer) Default Layer
+   * 
+   * ,-----------------------------------------------------------. .-------------------.
+   * | ~ | 1 |  2|  3|  4|  5|  6|  7|  8|  9|  0|  -|  =|Backsp | |NumL| /  | *  | -  |
+   * |-----------------------------------------------------------| |-------------------|
+   * |Tab  |  Q|  W|  E|  R|  T|  Y|  U|  I|  O|  P|  [|  ]|  \  | | 7  | 8  | 9  |    |
+   * |-----------------------------------------------------------| |--------------| +  |
+   * |CAPS   |  A|  S|  D|  F|  G|  H|  J|  K|  L|  ;|  '|Return | | 4  | 5  | 6  |    |
+   * |-----------------------------------------------------------| |-------------------|
+   * |Shift   |  Z|  X|  C|  V|  B|  N|  M|  ,|  .|  /|Shift     | | 1  | 2  | 3  | Ent|
+   * |-----------------------------------------------------------| |--------------|    |
+   * |Ctrl|Gui |Alt |      Space           | Alt | Win |FN  |Ctr | |   0     | .  |    |
+   * `-----------------------------------------------------------' '-------------------'
+   */
+  [BASE] = LAYOUT_all(
+    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, XXXXXXX, KC_NLCK, KC_PSLS, KC_PAST, KC_PMNS, \
+    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_P7,   KC_P8,   KC_P9,   XXXXXXX, \
+    KC_CAPS, KC_A,    KC_S,    KC_D,    KC_F,    KC_G,    KC_H,    KC_J,    KC_K,    KC_L,    KC_SCLN, KC_QUOT, XXXXXXX, KC_ENT,           KC_P4,   KC_P5,   KC_P6,   KC_PPLS, \
+    KC_LSFT, XXXXXXX, KC_Z,    KC_X,    KC_C,    KC_V,    KC_B,    KC_N,    KC_M,    KC_COMM, KC_DOT,  KC_SLSH, KC_RSFT, XXXXXXX,          KC_P1,   KC_P2,   KC_P3,   XXXXXXX, \
+    KC_LCTL, KC_LGUI, KC_LALT,                   KC_SPC,                        KC_RALT, KC_RWIN, MO(FUNCTION), KC_RCTL,                   KC_P0,   XXXXXXX, KC_PDOT, KC_PENT  \
+  ),
+  /* Keymap FUNCTION: (Function Layer)
+   * 
+   * ,-----------------------------------------------------------. .-------------------.
+   * |   |   |   |   |   |   |   |   |   |   |   |   |   | RESET | |    |    |    |    |
+   * |-----------------------------------------------------------| |-------------------|
+   * |     |   |   |   |   |   |   |   |   |   |   |   |   |     | |    |    |    |    |
+   * |-----------------------------------------------------------| |-------------------|
+   * |       |   |   |   |   |   |   |   |   |   |   |   |       | |    |    |    |    |
+   * |-----------------------------------------------------------| |-------------------|
+   * |        |Tog|Mod|Hu+|Hu-|Sa+|Sa-|Va+|Va-|Stp|   |          | |    |    |    |    |
+   * |-----------------------------------------------------------| |--------------|    |
+   * |    |    |    |                      |     |     |    |    | |         |    |    |
+   * `-----------------------------------------------------------' '-------------------'
+   */
+  [FUNCTION] = LAYOUT_all(
+    _______, _______, _______, _______, _______, _______, _______, _______, _______, _______, _______, _______, _______, RESET,   XXXXXXX, _______, _______, _______, _______, \
+    _______, _______, _______, _______, _______, _______, _______, _______, _______, _______, _______, _______, _______, _______,          _______, _______, _______, XXXXXXX, \
+    _______, _______, _______, _______, _______, _______, _______, _______, _______, _______, _______, _______, XXXXXXX, _______,          _______, _______, _______, _______, \
+    _______, XXXXXXX, RGB_TOG, RGB_MOD, RGB_HUI, RGB_HUD, RGB_SAI, RGB_SAD, RGB_VAI, RGB_VAD, BL_STEP, _______, _______, XXXXXXX,          _______, _______, _______, XXXXXXX, \
+    _______, _______, _______,                   _______,                        _______, _______, MO(FUNCTION), _______,                  _______, XXXXXXX, _______, _______  \
+  ),
+};
+
+bool process_record_user(uint16_t keycode, keyrecord_t *record) {
+  return true;
+}
+
+void led_set_user(uint8_t usb_led) {
+
+}
+
+void matrix_init_user(void) {
+  #ifdef USE_I2C
+    i2c_master_init();
+    #ifdef SSD1306OLED
+      // calls code for the SSD1306 OLED
+      _delay_ms(400);
+      TWI_Init(TWI_BIT_PRESCALE_1, TWI_BITLENGTH_FROM_FREQ(1, 800000));
+      if ( iota_gfx_init() ) { // turns on the display
+        screenWorks = 1;
+      }
+    #endif
+  #endif
+  #ifdef AUDIO_ENABLE
+    startup_user();
+  #endif
+}
+
+void matrix_scan_user(void) {
+  #ifdef SSD1306OLED
+    if ( screenWorks ) {
+      iota_gfx_task();  // this is what updates the display continuously
+    };
+  #endif
+}
+
+void matrix_update(struct CharacterMatrix *dest,
+                          const struct CharacterMatrix *source) {
+  if (memcmp(dest->display, source->display, sizeof(dest->display))) {
+    memcpy(dest->display, source->display, sizeof(dest->display));
+    dest->dirty = true;
+  }
+}
+
+void iota_gfx_task_user(void) {
+  #if DEBUG_TO_SCREEN
+    if (debug_enable) {
+      return;
+    }
+  #endif
+
+  struct CharacterMatrix matrix;
+
+  matrix_clear(&matrix);
+  matrix_write_P(&matrix, PSTR("TKC M0LLY"));
+
+  uint8_t layer = biton32(layer_state);
+
+  char buf[40];
+  snprintf(buf,sizeof(buf), "Undef-%d", layer);
+  matrix_write_P(&matrix, PSTR("\nLayer: "));
+  matrix_write(&matrix, layer_lookup[layer]);
+
+  // Host Keyboard LED Status
+  char led[40];
+    snprintf(led, sizeof(led), "\n\n%s  %s  %s",
+            (host_keyboard_leds() & (1<<USB_LED_NUM_LOCK)) ? "NUMLOCK" : "       ",
+            (host_keyboard_leds() & (1<<USB_LED_CAPS_LOCK)) ? "CAPS" : "    ",
+            (host_keyboard_leds() & (1<<USB_LED_SCROLL_LOCK)) ? "SCLK" : "    ");
+  matrix_write(&matrix, led);
+  matrix_update(&display, &matrix);
+}

keyboards/m0lly/m0lly.c

@@ -0,0 +1,69 @@
+/* Copyright 2017 Mathias Andersson <wraul@dbox.se>
+ *
+ * This program is free software: you can redistribute it and/or modify
+ * it under the terms of the GNU General Public License as published by
+ * the Free Software Foundation, either version 2 of the License, or
+ * (at your option) any later version.
+ *
+ * This program is distributed in the hope that it will be useful,
+ * but WITHOUT ANY WARRANTY; without even the implied warranty of
+ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+ * GNU General Public License for more details.
+ *
+ * You should have received a copy of the GNU General Public License
+ * along with this program.  If not, see <http://www.gnu.org/licenses/>.
+ */
+#include "m0lly.h"
+#include "led.h"
+
+void matrix_init_kb(void) {
+    // put your keyboard start-up code here
+    // runs once when the firmware starts up
+    led_init_ports();
+    matrix_init_user();
+}
+
+void matrix_scan_kb(void) {
+    // put your looping keyboard code here
+    // runs every cycle (a lot)
+
+    matrix_scan_user();
+}
+
+bool process_record_kb(uint16_t keycode, keyrecord_t *record) {
+    // put your per-action keyboard code here
+    // runs for every action, just before processing by the firmware
+
+    return process_record_user(keycode, record);
+}
+
+void led_init_ports(void) {
+	DDRD |= (1<<2) | (1<<3) | (1<<4); // OUT
+	DDRB |= (1<<7); // OUT
+	PORTB |= (1<<7);
+}
+
+void led_set_kb(uint8_t usb_led) {
+//    led_set_user(usb_led);
+	if (usb_led & (1<<USB_LED_NUM_LOCK)) {
+        // Turn numlock on
+		PORTD |= (1<<2);
+    } else {
+        // Turn numlock off
+	    PORTD &= ~(1<<2);
+    }
+	if (usb_led & (1<<USB_LED_CAPS_LOCK)) {
+        // Turn capslock on
+		PORTD |= (1<<3);
+    } else {
+        // Turn capslock off
+		PORTD &= ~(1<<3);
+    }
+	if (usb_led & (1<<USB_LED_SCROLL_LOCK)) {
+        // Turn scrolllock on
+	    PORTD |= (1<<4);
+    } else {
+        // Turn scrolllock off
+		PORTD &= ~(1<<4);
+    }
+}

keyboards/m0lly/m0lly.h

@@ -0,0 +1,32 @@
+/* Copyright 2017 Mathias Andersson <wraul@dbox.se>
+ *
+ * This program is free software: you can redistribute it and/or modify
+ * it under the terms of the GNU General Public License as published by
+ * the Free Software Foundation, either version 2 of the License, or
+ * (at your option) any later version.
+ *
+ * This program is distributed in the hope that it will be useful,
+ * but WITHOUT ANY WARRANTY; without even the implied warranty of
+ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+ * GNU General Public License for more details.
+ *
+ * You should have received a copy of the GNU General Public License
+ * along with this program.  If not, see <http://www.gnu.org/licenses/>.
+ */
+#pragma once
+
+#include "quantum.h"
+
+#define LAYOUT_all( \
+    K00, K01, K02, K03, K04, K05, K06, K07, K08, K09, K0A, K0B, K0C, K0D, K0E, K0F, K0G, K0H, K0I, \
+    K10, K11, K12, K13, K14, K15, K16, K17, K18, K19, K1A, K1B, K1C, K1D,      K1F, K1G, K1H, K1I, \
+    K20, K21, K22, K23, K24, K25, K26, K27, K28, K29, K2A, K2B, K2C, K2D,      K2F, K2G, K2H, K2I, \
+    K30, K31, K32, K33, K34, K35, K36, K37, K38, K39, K3A, K3B, K3C,    K3D,   K3F, K3G, K3H, K3I, \
+    K40, K41, K42,           K45,                        K49, K4B, K4C, K4D,   K4F, K4G, K4H, K4I  \
+) { \
+    { K00,   K01,   K02,   K03,   K04,   K05,   K06,   K07,   K08,   K09,   K0A,   K0B,   K0C,   K0D,   K0E,   K0F,   K0G, K0H, K0I }, \
+    { K10,   K11,   K12,   K13,   K14,   K15,   K16,   K17,   K18,   K19,   K1A,   K1B,   K1C,   K1D,   KC_NO, K1F,   K1G, K1H, K1I }, \
+    { K20,   K21,   K22,   K23,   K24,   K25,   K26,   K27,   K28,   K29,   K2A,   K2B,   K2C,   K2D,   KC_NO, K2F,   K2G, K2H, K2I }, \
+    { K30,   K31,   K32,   K33,   K34,   K35,   K36,   K37,   K38,   K39,   K3A,   K3B,   K3C,   K3D,   KC_NO, K3F,   K3G, K3H, K3I }, \
+    { K40,   K41,   K42,   KC_NO, KC_NO, K45,   KC_NO, KC_NO, KC_NO, K49,   KC_NO,   K4B,   K4C,   K4D,   KC_NO,   K4F, K4G, K4H, K4I }  \
+}

keyboards/m0lly/rules.mk

@@ -0,0 +1,72 @@
+
+# MCU name
+MCU = at90usb1286
+
+# Processor frequency.
+#     This will define a symbol, F_CPU, in all source code files equal to the
+#     processor frequency in Hz. You can then use this symbol in your source code to
+#     calculate timings. Do NOT tack on a 'UL' at the end, this will be done
+#     automatically to create a 32-bit value in your source code.
+#
+#     This will be an integer division of F_USB below, as it is sourced by
+#     F_USB after it has run through any CPU prescalers. Note that this value
+#     does not *change* the processor frequency - it should merely be updated to
+#     reflect the processor speed set externally so that the code can use accurate
+#     software delays.
+F_CPU = 16000000
+
+
+#
+# LUFA specific
+#
+# Target architecture (see library "Board Types" documentation).
+ARCH = AVR8
+
+# Input clock frequency.
+#     This will define a symbol, F_USB, in all source code files equal to the
+#     input clock frequency (before any prescaling is performed) in Hz. This value may
+#     differ from F_CPU if prescaling is used on the latter, and is required as the
+#     raw input clock is fed directly to the PLL sections of the AVR for high speed
+#     clock generation for the USB and other AVR subsections. Do NOT tack on a 'UL'
+#     at the end, this will be done automatically to create a 32-bit value in your
+#     source code.
+#
+#     If no clock division is performed on the input clock inside the AVR (via the
+#     CPU clock adjust registers or the clock division fuses), this will be equal to F_CPU.
+F_USB = $(F_CPU)
+
+# Interrupt driven control endpoint task(+60)
+OPT_DEFS += -DINTERRUPT_CONTROL_ENDPOINT
+
+
+# Bootloader selection
+#   Teensy       halfkay
+#   Pro Micro    caterina
+#   Atmel DFU    atmel-dfu
+#   LUFA DFU     lufa-dfu
+#   QMK DFU      qmk-dfu
+#   atmega32a    bootloadHID
+BOOTLOADER = atmel-dfu
+
+
+# Build Options
+#   change yes to no to disable
+#
+BOOTMAGIC_ENABLE = yes      # Virtual DIP switch configuration(+1000)
+MOUSEKEY_ENABLE = yes       # Mouse keys(+4700)
+EXTRAKEY_ENABLE = yes       # Audio control and System control(+450)
+CONSOLE_ENABLE = yes        # Console for debug(+400)
+COMMAND_ENABLE = yes        # Commands for debug and configuration
+# Do not enable SLEEP_LED_ENABLE. it uses the same timer as BACKLIGHT_ENABLE
+SLEEP_LED_ENABLE = no       # Breathing sleep LED during USB suspend
+# if this doesn't work, see here: https://github.com/tmk/tmk_keyboard/wiki/FAQ#nkro-doesnt-work
+NKRO_ENABLE = yes           # USB Nkey Rollover
+BACKLIGHT_ENABLE = yes      # Enable keyboard backlight functionality on B7 by default
+RGBLIGHT_ENABLE = yes       # Enable WS2812 RGB underlight. Do not enable this with audio at the same time.
+MIDI_ENABLE = no            # MIDI controls
+UNICODE_ENABLE = no         # Unicode
+BLUETOOTH_ENABLE = no       # Enable Bluetooth with the Adafruit EZ-Key HID
+AUDIO_ENABLE = no           # Audio output on port C6
+
+SRC = i2c.c \
+	  ssd1306.c