~ruther/qmk_firmware

6e27f6fbde47804035d508eb84690ed7ee9acee7 — climbalima 8 years ago 21e4431
  Changes to be committed:
	new file:   keyboards/lets_splitv2/Makefile
	new file:   keyboards/lets_splitv2/config.h
	new file:   keyboards/lets_splitv2/i2c.c
	new file:   keyboards/lets_splitv2/i2c.h
	new file:   keyboards/lets_splitv2/imgs/split-keyboard-i2c-schematic.png
	new file:   keyboards/lets_splitv2/imgs/split-keyboard-serial-schematic.png
	new file:   keyboards/lets_splitv2/keymaps/default/keymap.c
	new file:   keyboards/lets_splitv2/lets_split.c
	new file:   keyboards/lets_splitv2/lets_split.h
	new file:   keyboards/lets_splitv2/matrix.c
	new file:   keyboards/lets_splitv2/pro_micro.h
	new file:   keyboards/lets_splitv2/readme.md
	new file:   keyboards/lets_splitv2/serial.c
	new file:   keyboards/lets_splitv2/serial.h
	new file:   keyboards/lets_splitv2/split_util.c
	new file:   keyboards/lets_splitv2/split_util.h
	new file:   keyboards/maxipad/Makefile
	new file:   keyboards/maxipad/config.h
	new file:   keyboards/maxipad/keymaps/default/Makefile
	new file:   keyboards/maxipad/keymaps/default/config.h
	new file:   keyboards/maxipad/keymaps/default/keymap.c
	new file:   keyboards/maxipad/keymaps/default/readme.md
	new file:   keyboards/maxipad/maxipad.c
	new file:   keyboards/maxipad/maxipad.h
	new file:   keyboards/maxipad/readme.md
M keyboards/lets_split/Makefile => keyboards/lets_split/Makefile +1 -1
@@ 67,7 67,7 @@ AUDIO_ENABLE ?= yes           # Audio output on port C6
UNICODE_ENABLE ?= no         # Unicode
BLUETOOTH_ENABLE ?= no       # Enable Bluetooth with the Adafruit EZ-Key HID
RGBLIGHT_ENABLE ?= no        # Enable WS2812 RGB underlight.  Do not enable this with audio at the same time.

USE_I2C ?= 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


M keyboards/lets_split/config.h => keyboards/lets_split/config.h +3 -3
@@ 25,7 25,7 @@ along with this program.  If not, see <http://www.gnu.org/licenses/>.
#define PRODUCT_ID      0x3060
#define DEVICE_VER      0x0001
#define MANUFACTURER    Wootpatoot
#define PRODUCT         Lets Split
#define PRODUCT         Lets Split v2
#define DESCRIPTION     A split keyboard for the cheap makers

/* key matrix size */


@@ 34,8 34,8 @@ along with this program.  If not, see <http://www.gnu.org/licenses/>.
#define MATRIX_COLS 6

// wiring of each half
#define MATRIX_ROW_PINS { B5, B4, E6, D7 }
#define MATRIX_COL_PINS { F4, F5, F6, F7, B1, B3 }
#define MATRIX_ROW_PINS { D7, E6, B4, B5 }
#define MATRIX_COL_PINS { F6, F7, B1, B3, B2, B6 }

#define CATERINA_BOOTLOADER


M keyboards/lets_split/keymaps/default/keymap.c => keyboards/lets_split/keymaps/default/keymap.c +5 -60
@@ 42,64 42,17 @@ const uint16_t PROGMEM keymaps[][MATRIX_ROWS][MATRIX_COLS] = {
 * `-----------------------------------------------------------------------------------'
 */
[_QWERTY] = KEYMAP( \
  KC_TAB,  KC_Q,    KC_W,    KC_E,    KC_R,    KC_T,    KC_Y,    KC_U,    KC_I,    KC_O,    KC_P,    KC_BSPC, \
  KC_ESC,  KC_A,    KC_S,    KC_D,    KC_F,    KC_G,    KC_H,    KC_J,    KC_K,    KC_L,    KC_SCLN, KC_QUOT, \
  KC_ESC,  KC_Q,    KC_W,    KC_E,    KC_R,    KC_T,    KC_Y,    KC_U,    KC_I,    KC_O,    KC_P,    KC_BSPC, \
  KC_TAB,  KC_A,    KC_S,    KC_D,    KC_F,    KC_G,    KC_H,    KC_J,    KC_K,    KC_L,    KC_SCLN, KC_QUOT, \
  KC_LSFT, KC_Z,    KC_X,    KC_C,    KC_V,    KC_B,    KC_N,    KC_M,    KC_COMM, KC_DOT,  KC_SLSH, KC_ENT , \
  ADJUST,  KC_LCTL, KC_LALT, KC_LGUI, LOWER,   KC_SPC,  KC_SPC,  RAISE,   KC_LEFT, KC_DOWN, KC_UP,   KC_RGHT \
  KC_LCTL, _LOWER, KC_LGUI, KC_LALT, MO(_LOWER),   KC_SPC,  KC_LSFT,  MO(_RAISE),   KC_LEFT, KC_DOWN, KC_UP,   KC_RGHT \
),

/* Colemak
 * ,-----------------------------------------------------------------------------------.
 * | Tab  |   Q  |   W  |   F  |   P  |   G  |   J  |   L  |   U  |   Y  |   ;  | Bksp |
 * |------+------+------+------+------+-------------+------+------+------+------+------|
 * | Esc  |   A  |   R  |   S  |   T  |   D  |   H  |   N  |   E  |   I  |   O  |  "   |
 * |------+------+------+------+------+------|------+------+------+------+------+------|
 * | Shift|   Z  |   X  |   C  |   V  |   B  |   K  |   M  |   ,  |   .  |   /  |Enter |
 * |------+------+------+------+------+------+------+------+------+------+------+------|
 * |Adjust| Ctrl | Alt  | GUI  |Lower |Space |Space |Raise | Left | Down |  Up  |Right |
 * `-----------------------------------------------------------------------------------'
 */
[_COLEMAK] = KEYMAP( \
  KC_TAB,  KC_Q,    KC_W,    KC_F,    KC_P,    KC_G,    KC_J,    KC_L,    KC_U,    KC_Y,    KC_SCLN, KC_BSPC, \
  KC_ESC,  KC_A,    KC_R,    KC_S,    KC_T,    KC_D,    KC_H,    KC_N,    KC_E,    KC_I,    KC_O,    KC_QUOT, \
  KC_LSFT, KC_Z,    KC_X,    KC_C,    KC_V,    KC_B,    KC_K,    KC_M,    KC_COMM, KC_DOT,  KC_SLSH, KC_ENT , \
  ADJUST,  KC_LCTL, KC_LALT, KC_LGUI, LOWER,   KC_SPC,  KC_SPC,  RAISE,   KC_LEFT, KC_DOWN, KC_UP,   KC_RGHT \
),

/* Dvorak
 * ,-----------------------------------------------------------------------------------.
 * | Tab  |   "  |   ,  |   .  |   P  |   Y  |   F  |   G  |   C  |   R  |   L  | Bksp |
 * |------+------+------+------+------+-------------+------+------+------+------+------|
 * | Esc  |   A  |   O  |   E  |   U  |   I  |   D  |   H  |   T  |   N  |   S  |  /   |
 * |------+------+------+------+------+------|------+------+------+------+------+------|
 * | Shift|   ;  |   Q  |   J  |   K  |   X  |   B  |   M  |   W  |   V  |   Z  |Enter |
 * |------+------+------+------+------+------+------+------+------+------+------+------|
 * |Adjust| Ctrl | Alt  | GUI  |Lower |Space |Space |Raise | Left | Down |  Up  |Right |
 * `-----------------------------------------------------------------------------------'
 */
[_DVORAK] = KEYMAP( \
  KC_TAB,  KC_QUOT, KC_COMM, KC_DOT,  KC_P,    KC_Y,    KC_F,    KC_G,    KC_C,    KC_R,    KC_L,    KC_BSPC, \
  KC_ESC,  KC_A,    KC_O,    KC_E,    KC_U,    KC_I,    KC_D,    KC_H,    KC_T,    KC_N,    KC_S,    KC_SLSH, \
  KC_LSFT, KC_SCLN, KC_Q,    KC_J,    KC_K,    KC_X,    KC_B,    KC_M,    KC_W,    KC_V,    KC_Z,    KC_ENT , \
  ADJUST,  KC_LCTL, KC_LALT, KC_LGUI, LOWER,   KC_SPC,  KC_SPC,  RAISE,   KC_LEFT, KC_DOWN, KC_UP,   KC_RGHT \
),

/* Lower
 * ,-----------------------------------------------------------------------------------.
 * |   ~  |   !  |   @  |   #  |   $  |   %  |   ^  |   &  |   *  |   (  |   )  | Bksp |
 * |------+------+------+------+------+-------------+------+------+------+------+------|
 * | Del  |  F1  |  F2  |  F3  |  F4  |  F5  |  F6  |   _  |   +  |     |    \  |  |   |
 * |------+------+------+------+------+------|------+------+------+------+------+------|
 * |      |  F7  |  F8  |  F9  |  F10 |  F11 |  F12 |ISO ~ |ISO | |      |      |Enter |
 * |------+------+------+------+------+------+------+------+------+------+------+------|
 * |      |      |      |      |      |             |      | Next | Vol- | Vol+ | Play |
 * `-----------------------------------------------------------------------------------'
 */
[_LOWER] = KEYMAP( \
  KC_TILD, KC_EXLM, KC_AT,   KC_HASH, KC_DLR,  KC_PERC, KC_CIRC, KC_AMPR, KC_ASTR, KC_LPRN, KC_RPRN, KC_BSPC, \
  KC_DEL,  KC_F1,   KC_F2,   KC_F3,   KC_F4,   KC_F5,   KC_F6,   KC_UNDS, KC_PLUS, KC_LCBR, KC_RCBR, KC_PIPE, \
  _______, KC_F7,   KC_F8,   KC_F9,   KC_F10,  KC_F11,  KC_F12,S(KC_NUHS),S(KC_NUBS),_______, _______, _______, \
  _______, _______, _______, _______, _______, _______, _______, _______, KC_MNXT, KC_VOLD, KC_VOLU, KC_MPLY \
  _______, _______, _______, _______, _______, KC_BSPC, KC_BSPC, _______, KC_MNXT, KC_VOLD, KC_VOLU, KC_MPLY \
),

/* Raise


@@ 117,7 70,7 @@ const uint16_t PROGMEM keymaps[][MATRIX_ROWS][MATRIX_COLS] = {
  KC_GRV,  KC_1,    KC_2,    KC_3,    KC_4,    KC_5,    KC_6,    KC_7,    KC_8,    KC_9,    KC_0,    KC_BSPC, \
  KC_DEL,  KC_F1,   KC_F2,   KC_F3,   KC_F4,   KC_F5,   KC_F6,   KC_MINS, KC_EQL,  KC_LBRC, KC_RBRC, KC_BSLS, \
  _______, KC_F7,   KC_F8,   KC_F9,   KC_F10,  KC_F11,  KC_F12,  KC_NUHS, KC_NUBS, _______, _______, _______, \
  _______, _______, _______, _______, _______, _______, _______, _______, KC_MNXT, KC_VOLD, KC_VOLU, KC_MPLY \
  _______, _______, _______, _______, _______, KC_ENT, KC_ENT, _______, KC_MNXT, KC_VOLD, KC_VOLU, KC_MPLY \
),

/* Adjust (Lower + Raise)


@@ 131,14 84,6 @@ const uint16_t PROGMEM keymaps[][MATRIX_ROWS][MATRIX_COLS] = {
 * |      |      |      |      |      |             |      |      |      |      |      |
 * `-----------------------------------------------------------------------------------'
 */
[_ADJUST] =  KEYMAP( \
  _______, RESET,   _______, _______, _______, _______, _______, _______, _______, _______, _______, KC_DEL, \
  _______, _______, _______, AU_ON,   AU_OFF,  AG_NORM, AG_SWAP, QWERTY,  COLEMAK, DVORAK,  _______, _______, \
  _______, _______, _______, _______, _______, _______, _______, _______, _______, _______, _______, _______, \
  _______, _______, _______, _______, _______, _______, _______, _______, _______, _______, _______, _______ \
)


};

#ifdef AUDIO_ENABLE

M keyboards/lets_split/lets_split.h => keyboards/lets_split/lets_split.h +4 -4
@@ 6,10 6,10 @@
void promicro_bootloader_jmp(bool program);

#define KEYMAP( \
	k00, k01, k02, k03, k04, k05, k40, k41, k42, k43, k44, k45, \
	k10, k11, k12, k13, k14, k15, k50, k51, k52, k53, k54, k55, \
	k20, k21, k22, k23, k24, k25, k60, k61, k62, k63, k64, k65, \
	k30, k31, k32, k33, k34, k35, k70, k71, k72, k73, k74, k75 \
	k00, k01, k02, k03, k04, k05, k45, k44, k43, k42, k41, k40, \
	k10, k11, k12, k13, k14, k15, k55, k54, k53, k52, k51, k50, \
	k20, k21, k22, k23, k24, k25, k65, k64, k63, k62, k61, k60, \
	k30, k31, k32, k33, k34, k35, k75, k74, k73, k72, k71, k70 \
	) \
	{ \
		{ k00, k01, k02, k03, k04, k05 }, \

A keyboards/lets_splitv2/Makefile => keyboards/lets_splitv2/Makefile +78 -0
@@ 0,0 1,78 @@
SRC += matrix.c \
	   i2c.c \
	   split_util.c \
	   serial.c

# MCU name
#MCU = at90usb1287
MCU = atmega32u4

# 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


# Boot Section Size in *bytes*
#   Teensy halfKay   512
#   Teensy++ halfKay 1024
#   Atmel DFU loader 4096
#   LUFA bootloader  4096
#   USBaspLoader     2048
OPT_DEFS += -DBOOTLOADER_SIZE=4096

# Build Options
#   change to "no" to disable the options, or define them in the Makefile in 
#   the appropriate keymap folder that will get included automatically
#
BOOTMAGIC_ENABLE ?= no       # Virtual DIP switch configuration(+1000)
MOUSEKEY_ENABLE ?= yes       # Mouse keys(+4700)
EXTRAKEY_ENABLE ?= yes       # Audio control and System control(+450)
CONSOLE_ENABLE ?= no         # Console for debug(+400)
COMMAND_ENABLE ?= yes        # Commands for debug and configuration
NKRO_ENABLE ?= no            # Nkey Rollover - if this doesn't work, see here: https://github.com/tmk/tmk_keyboard/wiki/FAQ#nkro-doesnt-work
BACKLIGHT_ENABLE ?= no      # Enable keyboard backlight functionality
MIDI_ENABLE ?= no            # MIDI controls
AUDIO_ENABLE ?= yes           # Audio output on port C6
UNICODE_ENABLE ?= no         # Unicode
BLUETOOTH_ENABLE ?= no       # Enable Bluetooth with the Adafruit EZ-Key HID
RGBLIGHT_ENABLE ?= no        # Enable WS2812 RGB underlight.  Do not enable this with audio at the same time.
USE_I2C ?= 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

CUSTOM_MATRIX = yes

ifndef QUANTUM_DIR
	include ../../Makefile
endif
\ No newline at end of file

A keyboards/lets_splitv2/config.h => keyboards/lets_splitv2/config.h +98 -0
@@ 0,0 1,98 @@
/*
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/>.
*/

#ifndef CONFIG_H
#define CONFIG_H

#include "config_common.h"

/* USB Device descriptor parameter */
#define VENDOR_ID       0xFEED
#define PRODUCT_ID      0x3060
#define DEVICE_VER      0x0001
#define MANUFACTURER    Wootpatoot
#define PRODUCT         Lets Split v2
#define DESCRIPTION     A split keyboard for the cheap makers

/* key matrix size */
// Rows are doubled-up
#define MATRIX_ROWS 8
#define MATRIX_COLS 6

// wiring of each half
#define MATRIX_ROW_PINS { D7, E6, B4, B5 }
#define MATRIX_COL_PINS { F6, F7, B1, B3, B2, B6 }

#define CATERINA_BOOTLOADER

// #define USE_I2C

// #define EE_HANDS

#define I2C_MASTER_LEFT
// #define I2C_MASTER_RIGHT

/* COL2ROW or ROW2COL */
#define DIODE_DIRECTION COL2ROW

/* define if matrix has ghost */
//#define MATRIX_HAS_GHOST

/* number of backlight levels */
// #define BACKLIGHT_LEVELS 3

/* 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

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

/* ws2812 RGB LED */
#define ws2812_PORTREG  PORTD
#define ws2812_DDRREG   DDRD
#define ws2812_pin PD1
#define RGBLED_NUM 28     // Number of LEDs
#define RGBLIGHT_HUE_STEP 10
#define RGBLIGHT_SAT_STEP 17
#define RGBLIGHT_VAL_STEP 17

/*
 * 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

#endif
\ No newline at end of file

A keyboards/lets_splitv2/i2c.c => keyboards/lets_splitv2/i2c.c +159 -0
@@ 0,0 1,159 @@
#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"

// 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<<TWEN) | (1<<TWSTA);

  i2c_delay();

  // check that we started successfully
  if ( (TW_STATUS != TW_START) && (TW_STATUS != TW_REP_START))
    return 1;

  TWDR = address;
  TWCR = (1<<TWINT) | (1<<TWEN);

  i2c_delay();

  if ( (TW_STATUS != TW_MT_SLA_ACK) && (TW_STATUS != TW_MR_SLA_ACK) )
    return 1; // slave did not acknowledge
  else
    return 0; // success
}


// Finish the i2c transaction.
void i2c_master_stop(void) {
  TWCR = (1<<TWINT) | (1<<TWEN) | (1<<TWSTO);

  uint16_t lim = 0;
  while(!(TWCR & (1<<TWSTO)) && lim < I2C_LOOP_TIMEOUT)
    lim++;
}

// Write one byte to the i2c slave.
// returns 0 => slave ACK
//         1 => slave NACK
uint8_t i2c_master_write(uint8_t data) {
  TWDR = data;
  TWCR = (1<<TWINT) | (1<<TWEN);

  i2c_delay();

  // check if the slave acknowledged us
  return (TW_STATUS == TW_MT_DATA_ACK) ? 0 : 1;
}

// Read one byte from the i2c slave. If ack=1 the slave is acknowledged,
// if ack=0 the acknowledge bit is not set.
// returns: byte read from i2c device
uint8_t i2c_master_read(int ack) {
  TWCR = (1<<TWINT) | (1<<TWEN) | (ack<<TWEA);

  i2c_delay();
  return TWDR;
}

void i2c_reset_state(void) {
  TWCR = 0;
}

void i2c_slave_init(uint8_t address) {
  TWAR = address << 0; // slave i2c address
  // TWEN  - twi enable
  // TWEA  - enable address acknowledgement
  // TWINT - twi interrupt flag
  // TWIE  - enable the twi interrupt
  TWCR = (1<<TWIE) | (1<<TWEA) | (1<<TWINT) | (1<<TWEN);
}

ISR(TWI_vect);

ISR(TWI_vect) {
  uint8_t ack = 1;
  switch(TW_STATUS) {
    case TW_SR_SLA_ACK:
      // this device has been addressed as a slave receiver
      slave_has_register_set = false;
      break;

    case TW_SR_DATA_ACK:
      // this device has received data as a slave receiver
      // The first byte that we receive in this transaction sets the location
      // of the read/write location of the slaves memory that it exposes over
      // i2c.  After that, bytes will be written at slave_buffer_pos, incrementing
      // slave_buffer_pos after each write.
      if(!slave_has_register_set) {
        slave_buffer_pos = TWDR;
        // don't acknowledge the master if this memory loctaion is out of bounds
        if ( slave_buffer_pos >= SLAVE_BUFFER_SIZE ) {
          ack = 0;
          slave_buffer_pos = 0;
        }
        slave_has_register_set = true;
      } else {
        i2c_slave_buffer[slave_buffer_pos] = TWDR;
        BUFFER_POS_INC();
      }
      break;

    case TW_ST_SLA_ACK:
    case TW_ST_DATA_ACK:
      // master has addressed this device as a slave transmitter and is
      // requesting data.
      TWDR = i2c_slave_buffer[slave_buffer_pos];
      BUFFER_POS_INC();
      break;

    case TW_BUS_ERROR: // something went wrong, reset twi state
      TWCR = 0;
    default:
      break;
  }
  // Reset everything, so we are ready for the next TWI interrupt
  TWCR |= (1<<TWIE) | (1<<TWINT) | (ack<<TWEA) | (1<<TWEN);
}

A keyboards/lets_splitv2/i2c.h => keyboards/lets_splitv2/i2c.h +31 -0
@@ 0,0 1,31 @@
#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  100000L

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);

#endif

A keyboards/lets_splitv2/imgs/split-keyboard-i2c-schematic.png => keyboards/lets_splitv2/imgs/split-keyboard-i2c-schematic.png +0 -0
A keyboards/lets_splitv2/imgs/split-keyboard-serial-schematic.png => keyboards/lets_splitv2/imgs/split-keyboard-serial-schematic.png +0 -0
A keyboards/lets_splitv2/keymaps/default/keymap.c => keyboards/lets_splitv2/keymaps/default/keymap.c +159 -0
@@ 0,0 1,159 @@
#include "lets_split.h"
#include "action_layer.h"
#include "eeconfig.h"

extern keymap_config_t keymap_config;

// Each layer gets a name for readability, which is then used in the keymap matrix below.
// The underscores don't mean anything - you can have a layer called STUFF or any other name.
// Layer names don't all need to be of the same length, obviously, and you can also skip them
// entirely and just use numbers.
#define _QWERTY 0
#define _COLEMAK 1
#define _DVORAK 2
#define _LOWER 3
#define _RAISE 4
#define _ADJUST 16

enum custom_keycodes {
  QWERTY = SAFE_RANGE,
  COLEMAK,
  DVORAK,
  LOWER,
  RAISE,
  ADJUST,
};

// Fillers to make layering more clear
#define _______ KC_TRNS
#define XXXXXXX KC_NO

const uint16_t PROGMEM keymaps[][MATRIX_ROWS][MATRIX_COLS] = {

/* Qwerty
 * ,-----------------------------------------------------------------------------------.
 * | Tab  |   Q  |   W  |   E  |   R  |   T  |   Y  |   U  |   I  |   O  |   P  | Bksp |
 * |------+------+------+------+------+-------------+------+------+------+------+------|
 * | Esc  |   A  |   S  |   D  |   F  |   G  |   H  |   J  |   K  |   L  |   ;  |  "   |
 * |------+------+------+------+------+------|------+------+------+------+------+------|
 * | Shift|   Z  |   X  |   C  |   V  |   B  |   N  |   M  |   ,  |   .  |   /  |Enter |
 * |------+------+------+------+------+------+------+------+------+------+------+------|
 * |Adjust| Ctrl | Alt  | GUI  |Lower |Space |Space |Raise | Left | Down |  Up  |Right |
 * `-----------------------------------------------------------------------------------'
 */
[_QWERTY] = KEYMAP( \
  KC_ESC,  KC_Q,    KC_W,    KC_E,    KC_R,    KC_T,    KC_Y,    KC_U,    KC_I,    KC_O,    KC_P,    KC_BSPC, \
  KC_TAB,  KC_A,    KC_S,    KC_D,    KC_F,    KC_G,    KC_H,    KC_J,    KC_K,    KC_L,    KC_SCLN, KC_QUOT, \
  KC_LSFT, KC_Z,    KC_X,    KC_C,    KC_V,    KC_B,    KC_N,    KC_M,    KC_COMM, KC_DOT,  KC_SLSH, KC_ENT , \
  KC_LCTL, _LOWER, KC_LGUI, KC_LALT, MO(_LOWER),   KC_SPC,  KC_LSFT,  MO(_RAISE),   KC_LEFT, KC_DOWN, KC_UP,   KC_RGHT \
),

[_LOWER] = KEYMAP( \
  KC_TILD, KC_EXLM, KC_AT,   KC_HASH, KC_DLR,  KC_PERC, KC_CIRC, KC_AMPR, KC_ASTR, KC_LPRN, KC_RPRN, KC_BSPC, \
  KC_DEL,  KC_F1,   KC_F2,   KC_F3,   KC_F4,   KC_F5,   KC_F6,   KC_UNDS, KC_PLUS, KC_LCBR, KC_RCBR, KC_PIPE, \
  _______, KC_F7,   KC_F8,   KC_F9,   KC_F10,  KC_F11,  KC_F12,S(KC_NUHS),S(KC_NUBS),_______, _______, _______, \
  _______, _______, _______, _______, _______, KC_BSPC, KC_BSPC, _______, KC_MNXT, KC_VOLD, KC_VOLU, KC_MPLY \
),

/* Raise
 * ,-----------------------------------------------------------------------------------.
 * |   `  |   1  |   2  |   3  |   4  |   5  |   6  |   7  |   8  |   9  |   0  | Bksp |
 * |------+------+------+------+------+-------------+------+------+------+------+------|
 * | Del  |  F1  |  F2  |  F3  |  F4  |  F5  |  F6  |   -  |   =  |   [  |   ]  |  \   |
 * |------+------+------+------+------+------|------+------+------+------+------+------|
 * |      |  F7  |  F8  |  F9  |  F10 |  F11 |  F12 |ISO # |ISO / |      |      |Enter |
 * |------+------+------+------+------+------+------+------+------+------+------+------|
 * |      |      |      |      |      |             |      | Next | Vol- | Vol+ | Play |
 * `-----------------------------------------------------------------------------------'
 */
[_RAISE] = KEYMAP( \
  KC_GRV,  KC_1,    KC_2,    KC_3,    KC_4,    KC_5,    KC_6,    KC_7,    KC_8,    KC_9,    KC_0,    KC_BSPC, \
  KC_DEL,  KC_F1,   KC_F2,   KC_F3,   KC_F4,   KC_F5,   KC_F6,   KC_MINS, KC_EQL,  KC_LBRC, KC_RBRC, KC_BSLS, \
  _______, KC_F7,   KC_F8,   KC_F9,   KC_F10,  KC_F11,  KC_F12,  KC_NUHS, KC_NUBS, _______, _______, _______, \
  _______, _______, _______, _______, _______, KC_ENT, KC_ENT, _______, KC_MNXT, KC_VOLD, KC_VOLU, KC_MPLY \
),

/* Adjust (Lower + Raise)
 * ,-----------------------------------------------------------------------------------.
 * |      | Reset|      |      |      |      |      |      |      |      |      |  Del |
 * |------+------+------+------+------+-------------+------+------+------+------+------|
 * |      |      |      |Aud on|Audoff|AGnorm|AGswap|Qwerty|Colemk|Dvorak|      |      |
 * |------+------+------+------+------+------|------+------+------+------+------+------|
 * |      |      |      |      |      |      |      |      |      |      |      |      |
 * |------+------+------+------+------+------+------+------+------+------+------+------|
 * |      |      |      |      |      |             |      |      |      |      |      |
 * `-----------------------------------------------------------------------------------'
 */
};

#ifdef AUDIO_ENABLE
float tone_qwerty[][2]     = SONG(QWERTY_SOUND);
float tone_dvorak[][2]     = SONG(DVORAK_SOUND);
float tone_colemak[][2]    = SONG(COLEMAK_SOUND);
#endif

void persistant_default_layer_set(uint16_t default_layer) {
  eeconfig_update_default_layer(default_layer);
  default_layer_set(default_layer);
}

bool process_record_user(uint16_t keycode, keyrecord_t *record) {
  switch (keycode) {
    case QWERTY:
      if (record->event.pressed) {
        #ifdef AUDIO_ENABLE
          PLAY_NOTE_ARRAY(tone_qwerty, false, 0);
        #endif
        persistant_default_layer_set(1UL<<_QWERTY);
      }
      return false;
      break;
    case COLEMAK:
      if (record->event.pressed) {
        #ifdef AUDIO_ENABLE
          PLAY_NOTE_ARRAY(tone_colemak, false, 0);
        #endif
        persistant_default_layer_set(1UL<<_COLEMAK);
      }
      return false;
      break;
    case DVORAK:
      if (record->event.pressed) {
        #ifdef AUDIO_ENABLE
          PLAY_NOTE_ARRAY(tone_dvorak, false, 0);
        #endif
        persistant_default_layer_set(1UL<<_DVORAK);
      }
      return false;
      break;
    case LOWER:
      if (record->event.pressed) {
        layer_on(_LOWER);
        update_tri_layer(_LOWER, _RAISE, _ADJUST);
      } else {
        layer_off(_LOWER);
        update_tri_layer(_LOWER, _RAISE, _ADJUST);
      }
      return false;
      break;
    case RAISE:
      if (record->event.pressed) {
        layer_on(_RAISE);
        update_tri_layer(_LOWER, _RAISE, _ADJUST);
      } else {
        layer_off(_RAISE);
        update_tri_layer(_LOWER, _RAISE, _ADJUST);
      }
      return false;
      break;
    case ADJUST:
      if (record->event.pressed) {
        layer_on(_ADJUST);
      } else {
        layer_off(_ADJUST);
      }
      return false;
      break;
  }
  return true;
}
\ No newline at end of file

A keyboards/lets_splitv2/lets_split.c => keyboards/lets_splitv2/lets_split.c +30 -0
@@ 0,0 1,30 @@
#include "lets_split.h"

#ifdef AUDIO_ENABLE
    float tone_startup[][2] = SONG(STARTUP_SOUND);
    float tone_goodbye[][2] = SONG(GOODBYE_SOUND);
#endif

void matrix_init_kb(void) {

    #ifdef AUDIO_ENABLE
        _delay_ms(20); // gets rid of tick
        PLAY_NOTE_ARRAY(tone_startup, false, 0);
    #endif

    // // green led on
    // DDRD |= (1<<5);
    // PORTD &= ~(1<<5);

    // // orange led on
    // DDRB |= (1<<0);
    // PORTB &= ~(1<<0);

	matrix_init_user();
};

void shutdown_user(void) {
    PLAY_NOTE_ARRAY(tone_goodbye, false, 0);
    _delay_ms(150);
    stop_all_notes();
}

A keyboards/lets_splitv2/lets_split.h => keyboards/lets_splitv2/lets_split.h +25 -0
@@ 0,0 1,25 @@
#ifndef LETS_SPLIT_H
#define LETS_SPLIT_H

#include "quantum.h"

void promicro_bootloader_jmp(bool program);

#define KEYMAP( \
	k00, k01, k02, k03, k04, k05, k45, k44, k43, k42, k41, k40, \
	k10, k11, k12, k13, k14, k15, k55, k54, k53, k52, k51, k50, \
	k20, k21, k22, k23, k24, k25, k65, k64, k63, k62, k61, k60, \
	k30, k31, k32, k33, k34, k35, k75, k74, k73, k72, k71, k70 \
	) \
	{ \
		{ k00, k01, k02, k03, k04, k05 }, \
		{ k10, k11, k12, k13, k14, k15 }, \
		{ k20, k21, k22, k23, k24, k25 }, \
		{ k30, k31, k32, k33, k34, k35 }, \
		{ k40, k41, k42, k43, k44, k45 }, \
		{ k50, k51, k52, k53, k54, k55 }, \
		{ k60, k61, k62, k63, k64, k65 }, \
		{ k70, k71, k72, k73, k74, k75 } \
	}

#endif
\ No newline at end of file

A keyboards/lets_splitv2/matrix.c => keyboards/lets_splitv2/matrix.c +311 -0
@@ 0,0 1,311 @@
/*
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/>.
*/

/*
 * scan matrix
 */
#include <stdint.h>
#include <stdbool.h>
#include <avr/io.h>
#include <avr/wdt.h>
#include <avr/interrupt.h>
#include <util/delay.h>
#include "print.h"
#include "debug.h"
#include "util.h"
#include "matrix.h"
#include "i2c.h"
#include "serial.h"
#include "split_util.h"
#include "pro_micro.h"
#include "config.h"

#ifndef DEBOUNCE
#   define DEBOUNCE	5
#endif

#define ERROR_DISCONNECT_COUNT 5

static uint8_t debouncing = DEBOUNCE;
static const int ROWS_PER_HAND = MATRIX_ROWS/2;
static uint8_t error_count = 0;

static const uint8_t row_pins[MATRIX_ROWS] = MATRIX_ROW_PINS;
static const uint8_t col_pins[MATRIX_COLS] = MATRIX_COL_PINS;

/* matrix state(1:on, 0:off) */
static matrix_row_t matrix[MATRIX_ROWS];
static matrix_row_t matrix_debouncing[MATRIX_ROWS];

static matrix_row_t read_cols(void);
static void init_cols(void);
static void unselect_rows(void);
static void select_row(uint8_t row);

__attribute__ ((weak))
void matrix_init_quantum(void) {
    matrix_init_kb();
}

__attribute__ ((weak))
void matrix_scan_quantum(void) {
    matrix_scan_kb();
}

__attribute__ ((weak))
void matrix_init_kb(void) {
    matrix_init_user();
}

__attribute__ ((weak))
void matrix_scan_kb(void) {
    matrix_scan_user();
}

__attribute__ ((weak))
void matrix_init_user(void) {
}

__attribute__ ((weak))
void matrix_scan_user(void) {
}

inline
uint8_t matrix_rows(void)
{
    return MATRIX_ROWS;
}

inline
uint8_t matrix_cols(void)
{
    return MATRIX_COLS;
}

void matrix_init(void)
{
    debug_enable = true;
    debug_matrix = true;
    debug_mouse = true;
    // initialize row and col
    unselect_rows();
    init_cols();

    TX_RX_LED_INIT;

    // initialize matrix state: all keys off
    for (uint8_t i=0; i < MATRIX_ROWS; i++) {
        matrix[i] = 0;
        matrix_debouncing[i] = 0;
    }

    matrix_init_quantum();
}

uint8_t _matrix_scan(void)
{
    // Right hand is stored after the left in the matirx so, we need to offset it
    int offset = isLeftHand ? 0 : (ROWS_PER_HAND);

    for (uint8_t i = 0; i < ROWS_PER_HAND; i++) {
        select_row(i);
        _delay_us(30);  // without this wait read unstable value.
        matrix_row_t cols = read_cols();
        if (matrix_debouncing[i+offset] != cols) {
            matrix_debouncing[i+offset] = cols;
            debouncing = DEBOUNCE;
        }
        unselect_rows();
    }

    if (debouncing) {
        if (--debouncing) {
            _delay_ms(1);
        } else {
            for (uint8_t i = 0; i < ROWS_PER_HAND; i++) {
                matrix[i+offset] = matrix_debouncing[i+offset];
            }
        }
    }

    return 1;
}

// Get rows from other half over i2c
int i2c_transaction(void) {
    int slaveOffset = (isLeftHand) ? (ROWS_PER_HAND) : 0;

    int err = i2c_master_start(SLAVE_I2C_ADDRESS + I2C_WRITE);
    if (err) goto i2c_error;

    // start of matrix stored at 0x00
    err = i2c_master_write(0x00);
    if (err) goto i2c_error;

    // Start read
    err = i2c_master_start(SLAVE_I2C_ADDRESS + I2C_READ);
    if (err) goto i2c_error;

    if (!err) {
        int i;
        for (i = 0; i < ROWS_PER_HAND-1; ++i) {
            matrix[slaveOffset+i] = i2c_master_read(I2C_ACK);
        }
        matrix[slaveOffset+i] = i2c_master_read(I2C_NACK);
        i2c_master_stop();
    } else {
i2c_error: // the cable is disconnceted, or something else went wrong
        i2c_reset_state();
        return err;
    }

    return 0;
}

#ifndef USE_I2C
int serial_transaction(void) {
    int slaveOffset = (isLeftHand) ? (ROWS_PER_HAND) : 0;

    if (serial_update_buffers()) {
        return 1;
    }

    for (int i = 0; i < ROWS_PER_HAND; ++i) {
        matrix[slaveOffset+i] = serial_slave_buffer[i];
    }
    return 0;
}
#endif

uint8_t matrix_scan(void)
{
    int ret = _matrix_scan();



#ifdef USE_I2C
    if( i2c_transaction() ) {
#else
    if( serial_transaction() ) {
#endif
        // turn on the indicator led when halves are disconnected
        TXLED1;

        error_count++;

        if (error_count > ERROR_DISCONNECT_COUNT) {
            // reset other half if disconnected
            int slaveOffset = (isLeftHand) ? (ROWS_PER_HAND) : 0;
            for (int i = 0; i < ROWS_PER_HAND; ++i) {
                matrix[slaveOffset+i] = 0;
            }
        }
    } else {
        // turn off the indicator led on no error
        TXLED0;
        error_count = 0;
    }

    matrix_scan_quantum();

    return ret;
}

void matrix_slave_scan(void) {
    _matrix_scan();

    int offset = (isLeftHand) ? 0 : (MATRIX_ROWS / 2);

#ifdef USE_I2C
    for (int i = 0; i < ROWS_PER_HAND; ++i) {
        /* i2c_slave_buffer[i] = matrix[offset+i]; */
        i2c_slave_buffer[i] = matrix[offset+i];
    }
#else
    for (int i = 0; i < ROWS_PER_HAND; ++i) {
        serial_slave_buffer[i] = matrix[offset+i];
    }
#endif
}

bool matrix_is_modified(void)
{
    if (debouncing) return false;
    return true;
}

inline
bool matrix_is_on(uint8_t row, uint8_t col)
{
    return (matrix[row] & ((matrix_row_t)1<<col));
}

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

void matrix_print(void)
{
    print("\nr/c 0123456789ABCDEF\n");
    for (uint8_t row = 0; row < MATRIX_ROWS; row++) {
        phex(row); print(": ");
        pbin_reverse16(matrix_get_row(row));
        print("\n");
    }
}

uint8_t matrix_key_count(void)
{
    uint8_t count = 0;
    for (uint8_t i = 0; i < MATRIX_ROWS; i++) {
        count += bitpop16(matrix[i]);
    }
    return count;
}

static void  init_cols(void)
{
    for(int x = 0; x < MATRIX_COLS; x++) {
        _SFR_IO8((col_pins[x] >> 4) + 1) &=  ~_BV(col_pins[x] & 0xF);
        _SFR_IO8((col_pins[x] >> 4) + 2) |= _BV(col_pins[x] & 0xF);
    }
}

static matrix_row_t read_cols(void)
{
    matrix_row_t result = 0;
    for(int x = 0; x < MATRIX_COLS; x++) {     
        result |= (_SFR_IO8(col_pins[x] >> 4) & _BV(col_pins[x] & 0xF)) ? 0 : (1 << x);
    }
    return result;
}

static void unselect_rows(void)
{
    for(int x = 0; x < ROWS_PER_HAND; x++) { 
        _SFR_IO8((row_pins[x] >> 4) + 1) &=  ~_BV(row_pins[x] & 0xF);
        _SFR_IO8((row_pins[x] >> 4) + 2) |= _BV(row_pins[x] & 0xF);
    }
}

static void select_row(uint8_t row)
{
    _SFR_IO8((row_pins[row] >> 4) + 1) |=  _BV(row_pins[row] & 0xF);
    _SFR_IO8((row_pins[row] >> 4) + 2) &= ~_BV(row_pins[row] & 0xF);
}

A keyboards/lets_splitv2/pro_micro.h => keyboards/lets_splitv2/pro_micro.h +362 -0
@@ 0,0 1,362 @@
/*
  pins_arduino.h - Pin definition functions for Arduino
  Part of Arduino - http://www.arduino.cc/

  Copyright (c) 2007 David A. Mellis

  This library is free software; you can redistribute it and/or
  modify it under the terms of the GNU Lesser General Public
  License as published by the Free Software Foundation; either
  version 2.1 of the License, or (at your option) any later version.

  This library 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
  Lesser General Public License for more details.

  You should have received a copy of the GNU Lesser General
  Public License along with this library; if not, write to the
  Free Software Foundation, Inc., 59 Temple Place, Suite 330,
  Boston, MA  02111-1307  USA

  $Id: wiring.h 249 2007-02-03 16:52:51Z mellis $
*/

#ifndef Pins_Arduino_h
#define Pins_Arduino_h

#include <avr/pgmspace.h>

// Workaround for wrong definitions in "iom32u4.h".
// This should be fixed in the AVR toolchain.
#undef UHCON
#undef UHINT
#undef UHIEN
#undef UHADDR
#undef UHFNUM
#undef UHFNUML
#undef UHFNUMH
#undef UHFLEN
#undef UPINRQX
#undef UPINTX
#undef UPNUM
#undef UPRST
#undef UPCONX
#undef UPCFG0X
#undef UPCFG1X
#undef UPSTAX
#undef UPCFG2X
#undef UPIENX
#undef UPDATX
#undef TCCR2A
#undef WGM20
#undef WGM21
#undef COM2B0
#undef COM2B1
#undef COM2A0
#undef COM2A1
#undef TCCR2B
#undef CS20
#undef CS21
#undef CS22
#undef WGM22
#undef FOC2B
#undef FOC2A
#undef TCNT2
#undef TCNT2_0
#undef TCNT2_1
#undef TCNT2_2
#undef TCNT2_3
#undef TCNT2_4
#undef TCNT2_5
#undef TCNT2_6
#undef TCNT2_7
#undef OCR2A
#undef OCR2_0
#undef OCR2_1
#undef OCR2_2
#undef OCR2_3
#undef OCR2_4
#undef OCR2_5
#undef OCR2_6
#undef OCR2_7
#undef OCR2B
#undef OCR2_0
#undef OCR2_1
#undef OCR2_2
#undef OCR2_3
#undef OCR2_4
#undef OCR2_5
#undef OCR2_6
#undef OCR2_7

#define NUM_DIGITAL_PINS  30
#define NUM_ANALOG_INPUTS 12

#define TX_RX_LED_INIT  DDRD |= (1<<5), DDRB |= (1<<0)
#define TXLED0          PORTD |= (1<<5)
#define TXLED1          PORTD &= ~(1<<5)
#define RXLED0          PORTB |= (1<<0)
#define RXLED1          PORTB &= ~(1<<0)

static const uint8_t SDA = 2;
static const uint8_t SCL = 3;
#define LED_BUILTIN 13

// Map SPI port to 'new' pins D14..D17
static const uint8_t SS   = 17;
static const uint8_t MOSI = 16;
static const uint8_t MISO = 14;
static const uint8_t SCK  = 15;

// Mapping of analog pins as digital I/O
// A6-A11 share with digital pins
static const uint8_t A0 = 18;
static const uint8_t A1 = 19;
static const uint8_t A2 = 20;
static const uint8_t A3 = 21;
static const uint8_t A4 = 22;
static const uint8_t A5 = 23;
static const uint8_t A6 = 24;   // D4
static const uint8_t A7 = 25;   // D6
static const uint8_t A8 = 26;   // D8
static const uint8_t A9 = 27;   // D9
static const uint8_t A10 = 28;  // D10
static const uint8_t A11 = 29;  // D12

#define digitalPinToPCICR(p)    ((((p) >= 8 && (p) <= 11) || ((p) >= 14 && (p) <= 17) || ((p) >= A8 && (p) <= A10)) ? (&PCICR) : ((uint8_t *)0))
#define digitalPinToPCICRbit(p) 0
#define digitalPinToPCMSK(p)    ((((p) >= 8 && (p) <= 11) || ((p) >= 14 && (p) <= 17) || ((p) >= A8 && (p) <= A10)) ? (&PCMSK0) : ((uint8_t *)0))
#define digitalPinToPCMSKbit(p) ( ((p) >= 8 && (p) <= 11) ? (p) - 4 : ((p) == 14 ? 3 : ((p) == 15 ? 1 : ((p) == 16 ? 2 : ((p) == 17 ? 0 : (p - A8 + 4))))))

//  __AVR_ATmega32U4__ has an unusual mapping of pins to channels
extern const uint8_t PROGMEM analog_pin_to_channel_PGM[];
#define analogPinToChannel(P)  ( pgm_read_byte( analog_pin_to_channel_PGM + (P) ) )

#define digitalPinToInterrupt(p) ((p) == 0 ? 2 : ((p) == 1 ? 3 : ((p) == 2 ? 1 : ((p) == 3 ? 0 : ((p) == 7 ? 4 : NOT_AN_INTERRUPT)))))

#ifdef ARDUINO_MAIN

// On the Arduino board, digital pins are also used
// for the analog output (software PWM).  Analog input
// pins are a separate set.

// ATMEL ATMEGA32U4 / ARDUINO LEONARDO
//
// D0               PD2                 RXD1/INT2
// D1               PD3                 TXD1/INT3
// D2               PD1     SDA         SDA/INT1
// D3#              PD0     PWM8/SCL    OC0B/SCL/INT0
// D4       A6      PD4                 ADC8
// D5#              PC6     ???         OC3A/#OC4A
// D6#      A7      PD7     FastPWM     #OC4D/ADC10
// D7               PE6                 INT6/AIN0
//
// D8       A8      PB4                 ADC11/PCINT4
// D9#      A9      PB5     PWM16       OC1A/#OC4B/ADC12/PCINT5
// D10#     A10     PB6     PWM16       OC1B/0c4B/ADC13/PCINT6
// D11#             PB7     PWM8/16     0C0A/OC1C/#RTS/PCINT7
// D12      A11     PD6                 T1/#OC4D/ADC9
// D13#             PC7     PWM10       CLK0/OC4A
//
// A0       D18     PF7                 ADC7
// A1       D19     PF6                 ADC6
// A2       D20     PF5                 ADC5
// A3       D21     PF4                 ADC4
// A4       D22     PF1                 ADC1
// A5       D23     PF0                 ADC0
//
// New pins D14..D17 to map SPI port to digital pins
//
// MISO     D14     PB3                 MISO,PCINT3
// SCK      D15     PB1                 SCK,PCINT1
// MOSI     D16     PB2                 MOSI,PCINT2
// SS       D17     PB0                 RXLED,SS/PCINT0
//
// Connected LEDs on board for TX and RX
// TXLED    D24     PD5                 XCK1
// RXLED    D17     PB0
// HWB              PE2                 HWB

// these arrays map port names (e.g. port B) to the
// appropriate addresses for various functions (e.g. reading
// and writing)
const uint16_t PROGMEM port_to_mode_PGM[] = {
    NOT_A_PORT,
    NOT_A_PORT,
    (uint16_t) &DDRB,
    (uint16_t) &DDRC,
    (uint16_t) &DDRD,
    (uint16_t) &DDRE,
    (uint16_t) &DDRF,
};

const uint16_t PROGMEM port_to_output_PGM[] = {
    NOT_A_PORT,
    NOT_A_PORT,
    (uint16_t) &PORTB,
    (uint16_t) &PORTC,
    (uint16_t) &PORTD,
    (uint16_t) &PORTE,
    (uint16_t) &PORTF,
};

const uint16_t PROGMEM port_to_input_PGM[] = {
    NOT_A_PORT,
    NOT_A_PORT,
    (uint16_t) &PINB,
    (uint16_t) &PINC,
    (uint16_t) &PIND,
    (uint16_t) &PINE,
    (uint16_t) &PINF,
};

const uint8_t PROGMEM digital_pin_to_port_PGM[] = {
    PD, // D0 - PD2
    PD, // D1 - PD3
    PD, // D2 - PD1
    PD, // D3 - PD0
    PD, // D4 - PD4
    PC, // D5 - PC6
    PD, // D6 - PD7
    PE, // D7 - PE6
    
    PB, // D8 - PB4
    PB, // D9 - PB5
    PB, // D10 - PB6
    PB, // D11 - PB7
    PD, // D12 - PD6
    PC, // D13 - PC7
    
    PB, // D14 - MISO - PB3
    PB, // D15 - SCK - PB1
    PB, // D16 - MOSI - PB2
    PB, // D17 - SS - PB0
    
    PF, // D18 - A0 - PF7
    PF, // D19 - A1 - PF6
    PF, // D20 - A2 - PF5
    PF, // D21 - A3 - PF4
    PF, // D22 - A4 - PF1
    PF, // D23 - A5 - PF0
    
    PD, // D24 - PD5
    PD, // D25 / D6 - A7 - PD7
    PB, // D26 / D8 - A8 - PB4
    PB, // D27 / D9 - A9 - PB5
    PB, // D28 / D10 - A10 - PB6
    PD, // D29 / D12 - A11 - PD6
};

const uint8_t PROGMEM digital_pin_to_bit_mask_PGM[] = {
    _BV(2), // D0 - PD2
    _BV(3), // D1 - PD3
    _BV(1), // D2 - PD1
    _BV(0), // D3 - PD0
    _BV(4), // D4 - PD4
    _BV(6), // D5 - PC6
    _BV(7), // D6 - PD7
    _BV(6), // D7 - PE6
    
    _BV(4), // D8 - PB4
    _BV(5), // D9 - PB5
    _BV(6), // D10 - PB6
    _BV(7), // D11 - PB7
    _BV(6), // D12 - PD6
    _BV(7), // D13 - PC7
    
    _BV(3), // D14 - MISO - PB3
    _BV(1), // D15 - SCK - PB1
    _BV(2), // D16 - MOSI - PB2
    _BV(0), // D17 - SS - PB0
    
    _BV(7), // D18 - A0 - PF7
    _BV(6), // D19 - A1 - PF6
    _BV(5), // D20 - A2 - PF5
    _BV(4), // D21 - A3 - PF4
    _BV(1), // D22 - A4 - PF1
    _BV(0), // D23 - A5 - PF0
    
    _BV(5), // D24 - PD5
    _BV(7), // D25 / D6 - A7 - PD7
    _BV(4), // D26 / D8 - A8 - PB4
    _BV(5), // D27 / D9 - A9 - PB5
    _BV(6), // D28 / D10 - A10 - PB6
    _BV(6), // D29 / D12 - A11 - PD6
};

const uint8_t PROGMEM digital_pin_to_timer_PGM[] = {
    NOT_ON_TIMER,   
    NOT_ON_TIMER,
    NOT_ON_TIMER,
    TIMER0B,        /* 3 */
    NOT_ON_TIMER,
    TIMER3A,        /* 5 */
    TIMER4D,        /* 6 */
    NOT_ON_TIMER,   
    
    NOT_ON_TIMER,   
    TIMER1A,        /* 9 */
    TIMER1B,        /* 10 */
    TIMER0A,        /* 11 */
    
    NOT_ON_TIMER,   
    TIMER4A,        /* 13 */
    
    NOT_ON_TIMER,   
    NOT_ON_TIMER,
    NOT_ON_TIMER,
    NOT_ON_TIMER,
    NOT_ON_TIMER,
    NOT_ON_TIMER,

    NOT_ON_TIMER,
    NOT_ON_TIMER,
    NOT_ON_TIMER,
    NOT_ON_TIMER,
    NOT_ON_TIMER,
    NOT_ON_TIMER,
    NOT_ON_TIMER,
    NOT_ON_TIMER,
    NOT_ON_TIMER,
    NOT_ON_TIMER,
};

const uint8_t PROGMEM analog_pin_to_channel_PGM[] = {
    7,  // A0               PF7                 ADC7
    6,  // A1               PF6                 ADC6    
    5,  // A2               PF5                 ADC5    
    4,  // A3               PF4                 ADC4
    1,  // A4               PF1                 ADC1    
    0,  // A5               PF0                 ADC0    
    8,  // A6       D4      PD4                 ADC8
    10, // A7       D6      PD7                 ADC10
    11, // A8       D8      PB4                 ADC11
    12, // A9       D9      PB5                 ADC12
    13, // A10      D10     PB6                 ADC13
    9   // A11      D12     PD6                 ADC9
};

#endif /* ARDUINO_MAIN */

// These serial port names are intended to allow libraries and architecture-neutral
// sketches to automatically default to the correct port name for a particular type
// of use.  For example, a GPS module would normally connect to SERIAL_PORT_HARDWARE_OPEN,
// the first hardware serial port whose RX/TX pins are not dedicated to another use.
//
// SERIAL_PORT_MONITOR        Port which normally prints to the Arduino Serial Monitor
//
// SERIAL_PORT_USBVIRTUAL     Port which is USB virtual serial
//
// SERIAL_PORT_LINUXBRIDGE    Port which connects to a Linux system via Bridge library
//
// SERIAL_PORT_HARDWARE       Hardware serial port, physical RX & TX pins.
//
// SERIAL_PORT_HARDWARE_OPEN  Hardware serial ports which are open for use.  Their RX & TX
//                            pins are NOT connected to anything by default.
#define SERIAL_PORT_MONITOR        Serial
#define SERIAL_PORT_USBVIRTUAL     Serial
#define SERIAL_PORT_HARDWARE       Serial1
#define SERIAL_PORT_HARDWARE_OPEN  Serial1

#endif /* Pins_Arduino_h */

A keyboards/lets_splitv2/readme.md => keyboards/lets_splitv2/readme.md +102 -0
@@ 0,0 1,102 @@
Let's Split
======

This readme and most of the code are from https://github.com/ahtn/tmk_keyboard/

Split keyboard firmware for Arduino Pro Micro or other ATmega32u4
based boards.

Features
--------

Some features supported by the firmware:

* Either half can connect to the computer via USB, or both halves can be used
  independently.
* You only need 3 wires to connect the two halves. Two for VCC and GND and one
  for serial communication.
* Optional support for I2C connection between the two halves if for some
  reason you require a faster connection between the two halves. Note this
  requires an extra wire between halves and pull-up resistors on the data lines.

Required Hardware
-----------------

Apart from diodes and key switches for the keyboard matrix in each half, you
will need:

* 2 Arduino Pro Micro's. You can find theses on aliexpress for ≈3.50USD each.
* 2 TRS sockets
* 1 TRS cable.

Alternatively, you can use any sort of cable and socket that has at least 3
wires. If you want to use I2C to communicate between halves, you will need a
cable with at least 4 wires and 2x 4.7kΩ pull-up resistors

Optional Hardware
-----------------

A speaker can be hooked-up to either side to the `5` (`C6`) pin and `GND`, and turned on via `AUDIO_ENABLE`.

Wiring
------

The 3 wires of the TRS cable need to connect GND, VCC, and digital pin 3 (i.e.
PD0 on the ATmega32u4) between the two Pro Micros.

Then wire your key matrix to any of the remaining 17 IO pins of the pro micro
and modify the `matrix.c` accordingly.

The wiring for serial:

![serial wiring](imgs/split-keyboard-serial-schematic.png)

The wiring for i2c:

![i2c wiring](imgs/split-keyboard-i2c-schematic.png)

The pull-up resistors may be placed on either half. It is also possible
to use 4 resistors and have the pull-ups in both halves, but this is
unnecessary in simple use cases.

Notes on Software Configuration
-------------------------------

Configuring the firmware is similar to any other TMK project. One thing
to note is that `MATIX_ROWS` in `config.h` is the total number of rows between
the two halves, i.e. if your split keyboard has 4 rows in each half, then
`MATRIX_ROWS=8`.

Also the current implementation assumes a maximum of 8 columns, but it would
not be very difficult to adapt it to support more if required.


Flashing
--------

If you define `EE_HANDS` in your `config.h`, you will need to set the
EEPROM for the left and right halves. The EEPROM is used to store whether the
half is left handed or right handed. This makes it so that the same firmware
file will run on both hands instead of having to flash left and right handed
versions of the firmware to each half. To flash the EEPROM file for the left
half run:
```
make eeprom-left
```
and similarly for right half
```
make eeprom-right
```

After you have flashed the EEPROM for the first time, you then need to program
the flash memory:
```
make program
```
Note that you need to program both halves, but you have the option of using
different keymaps for each half. You could program the left half with a QWERTY
layout and the right half with a Colemak layout. Then if you connect the left
half to a computer by USB the keyboard will use QWERTY and Colemak when the
right half is connected.



A keyboards/lets_splitv2/serial.c => keyboards/lets_splitv2/serial.c +225 -0
@@ 0,0 1,225 @@
/*
 * WARNING: be careful changing this code, it is very timing dependent
 */

#ifndef F_CPU
#define F_CPU 16000000
#endif

#include <avr/io.h>
#include <avr/interrupt.h>
#include <util/delay.h>
#include <stdbool.h>

#include "serial.h"

// Serial pulse period in microseconds. Its probably a bad idea to lower this
// value.
#define SERIAL_DELAY 24

uint8_t volatile serial_slave_buffer[SERIAL_SLAVE_BUFFER_LENGTH] = {0};
uint8_t volatile serial_master_buffer[SERIAL_MASTER_BUFFER_LENGTH] = {0};

#define SLAVE_DATA_CORRUPT (1<<0)
volatile uint8_t status = 0;

inline static
void serial_delay(void) {
  _delay_us(SERIAL_DELAY);
}

inline static
void serial_output(void) {
  SERIAL_PIN_DDR |= SERIAL_PIN_MASK;
}

// make the serial pin an input with pull-up resistor
inline static
void serial_input(void) {
  SERIAL_PIN_DDR  &= ~SERIAL_PIN_MASK;
  SERIAL_PIN_PORT |= SERIAL_PIN_MASK;
}

inline static
uint8_t serial_read_pin(void) {
  return !!(SERIAL_PIN_INPUT & SERIAL_PIN_MASK);
}

inline static
void serial_low(void) {
  SERIAL_PIN_PORT &= ~SERIAL_PIN_MASK;
}

inline static
void serial_high(void) {
  SERIAL_PIN_PORT |= SERIAL_PIN_MASK;
}

void serial_master_init(void) {
  serial_output();
  serial_high();
}

void serial_slave_init(void) {
  serial_input();

  // Enable INT0
  EIMSK |= _BV(INT0);
  // Trigger on falling edge of INT0
  EICRA &= ~(_BV(ISC00) | _BV(ISC01));
}

// Used by the master to synchronize timing with the slave.
static
void sync_recv(void) {
  serial_input();
  // This shouldn't hang if the slave disconnects because the
  // serial line will float to high if the slave does disconnect.
  while (!serial_read_pin());
  serial_delay();
}

// Used by the slave to send a synchronization signal to the master.
static
void sync_send(void) {
  serial_output();

  serial_low();
  serial_delay();

  serial_high();
}

// Reads a byte from the serial line
static
uint8_t serial_read_byte(void) {
  uint8_t byte = 0;
  serial_input();
  for ( uint8_t i = 0; i < 8; ++i) {
    byte = (byte << 1) | serial_read_pin();
    serial_delay();
    _delay_us(1);
  }

  return byte;
}

// Sends a byte with MSB ordering
static
void serial_write_byte(uint8_t data) {
  uint8_t b = 8;
  serial_output();
  while( b-- ) {
    if(data & (1 << b)) {
      serial_high();
    } else {
      serial_low();
    }
    serial_delay();
  }
}

// interrupt handle to be used by the slave device
ISR(SERIAL_PIN_INTERRUPT) {
  sync_send();

  uint8_t checksum = 0;
  for (int i = 0; i < SERIAL_SLAVE_BUFFER_LENGTH; ++i) {
    serial_write_byte(serial_slave_buffer[i]);
    sync_send();
    checksum += serial_slave_buffer[i];
  }
  serial_write_byte(checksum);
  sync_send();

  // wait for the sync to finish sending
  serial_delay();

  // read the middle of pulses
  _delay_us(SERIAL_DELAY/2);

  uint8_t checksum_computed = 0;
  for (int i = 0; i < SERIAL_MASTER_BUFFER_LENGTH; ++i) {
    serial_master_buffer[i] = serial_read_byte();
    sync_send();
    checksum_computed += serial_master_buffer[i];
  }
  uint8_t checksum_received = serial_read_byte();
  sync_send();

  serial_input(); // end transaction

  if ( checksum_computed != checksum_received ) {
    status |= SLAVE_DATA_CORRUPT;
  } else {
    status &= ~SLAVE_DATA_CORRUPT;
  }
}

inline
bool serial_slave_DATA_CORRUPT(void) {
  return status & SLAVE_DATA_CORRUPT;
}

// Copies the serial_slave_buffer to the master and sends the
// serial_master_buffer to the slave.
//
// Returns:
// 0 => no error
// 1 => slave did not respond
int serial_update_buffers(void) {
  // this code is very time dependent, so we need to disable interrupts
  cli();

  // signal to the slave that we want to start a transaction
  serial_output();
  serial_low();
  _delay_us(1);

  // wait for the slaves response
  serial_input();
  serial_high();
  _delay_us(SERIAL_DELAY);

  // check if the slave is present
  if (serial_read_pin()) {
    // slave failed to pull the line low, assume not present
    sei();
    return 1;
  }

  // if the slave is present syncronize with it
  sync_recv();

  uint8_t checksum_computed = 0;
  // receive data from the slave
  for (int i = 0; i < SERIAL_SLAVE_BUFFER_LENGTH; ++i) {
    serial_slave_buffer[i] = serial_read_byte();
    sync_recv();
    checksum_computed += serial_slave_buffer[i];
  }
  uint8_t checksum_received = serial_read_byte();
  sync_recv();

  if (checksum_computed != checksum_received) {
    sei();
    return 1;
  }

  uint8_t checksum = 0;
  // send data to the slave
  for (int i = 0; i < SERIAL_MASTER_BUFFER_LENGTH; ++i) {
    serial_write_byte(serial_master_buffer[i]);
    sync_recv();
    checksum += serial_master_buffer[i];
  }
  serial_write_byte(checksum);
  sync_recv();

  // always, release the line when not in use
  serial_output();
  serial_high();

  sei();
  return 0;
}

A keyboards/lets_splitv2/serial.h => keyboards/lets_splitv2/serial.h +26 -0
@@ 0,0 1,26 @@
#ifndef MY_SERIAL_H
#define MY_SERIAL_H

#include "config.h"
#include <stdbool.h>

/* TODO:  some defines for interrupt setup */
#define SERIAL_PIN_DDR DDRD
#define SERIAL_PIN_PORT PORTD
#define SERIAL_PIN_INPUT PIND
#define SERIAL_PIN_MASK _BV(PD0)
#define SERIAL_PIN_INTERRUPT INT0_vect

#define SERIAL_SLAVE_BUFFER_LENGTH MATRIX_ROWS/2
#define SERIAL_MASTER_BUFFER_LENGTH 1

// Buffers for master - slave communication
extern volatile uint8_t serial_slave_buffer[SERIAL_SLAVE_BUFFER_LENGTH];
extern volatile uint8_t serial_master_buffer[SERIAL_MASTER_BUFFER_LENGTH];

void serial_master_init(void);
void serial_slave_init(void);
int serial_update_buffers(void);
bool serial_slave_data_corrupt(void);

#endif

A keyboards/lets_splitv2/split_util.c => keyboards/lets_splitv2/split_util.c +76 -0
@@ 0,0 1,76 @@
#include <avr/io.h>
#include <avr/wdt.h>
#include <avr/power.h>
#include <avr/interrupt.h>
#include <util/delay.h>
#include <avr/eeprom.h>
#include "split_util.h"
#include "matrix.h"
#include "i2c.h"
#include "serial.h"
#include "keyboard.h"
#include "config.h"

volatile bool isLeftHand = true;

static void setup_handedness(void) {
  #ifdef EE_HANDS
    isLeftHand = eeprom_read_byte(EECONFIG_HANDEDNESS);
  #else
    #ifdef I2C_MASTER_RIGHT
      isLeftHand = !has_usb();
    #else
      isLeftHand = has_usb();
    #endif
  #endif
}

static void keyboard_master_setup(void) {
#ifdef USE_I2C
    i2c_master_init();
#else
    serial_master_init();
#endif
}

static void keyboard_slave_setup(void) {
#ifdef USE_I2C
    i2c_slave_init(SLAVE_I2C_ADDRESS);
#else
    serial_slave_init();
#endif
}

bool has_usb(void) {
   USBCON |= (1 << OTGPADE); //enables VBUS pad
   _delay_us(5);
   return (USBSTA & (1<<VBUS));  //checks state of VBUS
}

void split_keyboard_setup(void) {
   setup_handedness();

   if (has_usb()) {
      keyboard_master_setup();
   } else {
      keyboard_slave_setup();
   }
   sei();
}

void keyboard_slave_loop(void) {
   matrix_init();

   while (1) {
      matrix_slave_scan();
   }
}

// this code runs before the usb and keyboard is initialized
void matrix_setup(void) {
    split_keyboard_setup();

    if (!has_usb()) {
        keyboard_slave_loop();
    }
}

A keyboards/lets_splitv2/split_util.h => keyboards/lets_splitv2/split_util.h +22 -0
@@ 0,0 1,22 @@
#ifndef SPLIT_KEYBOARD_UTIL_H
#define SPLIT_KEYBOARD_UTIL_H

#include <stdbool.h>

#ifdef EE_HANDS
	#define EECONFIG_BOOTMAGIC_END      (uint8_t *)10
	#define EECONFIG_HANDEDNESS         EECONFIG_BOOTMAGIC_END
#endif

#define SLAVE_I2C_ADDRESS           0x32

extern volatile bool isLeftHand;

// slave version of matix scan, defined in matrix.c
void matrix_slave_scan(void);

void split_keyboard_setup(void);
bool has_usb(void);
void keyboard_slave_loop(void);

#endif

A keyboards/maxipad/Makefile => keyboards/maxipad/Makefile +75 -0
@@ 0,0 1,75 @@


# MCU name
#MCU = at90usb1287
MCU = atmega32u4

# 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


# Boot Section Size in *bytes*
#   Teensy halfKay   512
#   Teensy++ halfKay 1024
#   Atmel DFU loader 4096
#   LUFA bootloader  4096
#   USBaspLoader     2048
OPT_DEFS += -DBOOTLOADER_SIZE=512


# Build Options
#   change yes to no to disable
#
BOOTMAGIC_ENABLE ?= no      # 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 ?= no            # USB Nkey Rollover
BACKLIGHT_ENABLE ?= no       # Enable keyboard backlight functionality on B7 by default
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

ifndef QUANTUM_DIR
	include ../../Makefile
endif



A keyboards/maxipad/config.h => keyboards/maxipad/config.h +162 -0
@@ 0,0 1,162 @@
/*
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/>.
*/

#ifndef CONFIG_H
#define CONFIG_H

#include "config_common.h"

/* USB Device descriptor parameter */
#define VENDOR_ID       0xFEED
#define PRODUCT_ID      0x6060
#define DEVICE_VER      0x0001
#define MANUFACTURER    Wootpatoot
#define PRODUCT         maxipad
#define DESCRIPTION     g8ming keeb

/* key matrix size */
#define MATRIX_ROWS 5
#define MATRIX_COLS 6

/*
 * Keyboard Matrix Assignments
 *
 * Change this to how you wired your keyboard
 * COLS: AVR pins used for columns, left to right
 * ROWS: AVR pins used for rows, top to bottom
 * DIODE_DIRECTION: COL2ROW = COL = Anode (+), ROW = Cathode (-, marked on diode)
 *                  ROW2COL = ROW = Anode (+), COL = Cathode (-, marked on diode)
 *
*/
#define MATRIX_ROW_PINS { B6, F7, B2, B3, B1 }
#define MATRIX_COL_PINS { F6, C6, D7, F5, B4, B5 }
#define UNUSED_PINS

/* COL2ROW or ROW2COL */
#define DIODE_DIRECTION COL2ROW
 
// #define BACKLIGHT_PIN B7
// #define BACKLIGHT_BREATHING
// #define BACKLIGHT_LEVELS 3


/* Debounce reduces chatter (unintended double-presses) - set 0 if debouncing is not needed */
#define DEBOUNCING_DELAY 5

/* define if matrix has ghost (lacks anti-ghosting diodes) */
//#define MATRIX_HAS_GHOST

/* number of backlight levels */

/* 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.
 *
 */

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

/* 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

#endif

A keyboards/maxipad/keymaps/default/Makefile => keyboards/maxipad/keymaps/default/Makefile +21 -0
@@ 0,0 1,21 @@
# Build Options
#   change to "no" to disable the options, or define them in the Makefile in 
#   the appropriate keymap folder that will get included automatically
#
BOOTMAGIC_ENABLE = no       # Virtual DIP switch configuration(+1000)
MOUSEKEY_ENABLE = yes       # Mouse keys(+4700)
EXTRAKEY_ENABLE = yes       # Audio control and System control(+450)
CONSOLE_ENABLE = no         # Console for debug(+400)
COMMAND_ENABLE = yes        # Commands for debug and configuration
NKRO_ENABLE = yes           # Nkey Rollover - if this doesn't work, see here: https://github.com/tmk/tmk_keyboard/wiki/FAQ#nkro-doesnt-work
BACKLIGHT_ENABLE = no       # Enable keyboard backlight functionality
MIDI_ENABLE = no            # MIDI controls
AUDIO_ENABLE = no           # Audio output on port C6
UNICODE_ENABLE = no         # Unicode
BLUETOOTH_ENABLE = no       # Enable Bluetooth with the Adafruit EZ-Key HID
RGBLIGHT_ENABLE = no        # Enable WS2812 RGB underlight.  Do not enable this with audio at the same time.
SLEEP_LED_ENABLE = no       # Breathing sleep LED during USB suspend

ifndef QUANTUM_DIR
	include ../../../../Makefile
endif
\ No newline at end of file

A keyboards/maxipad/keymaps/default/config.h => keyboards/maxipad/keymaps/default/config.h +8 -0
@@ 0,0 1,8 @@
#ifndef CONFIG_USER_H
#define CONFIG_USER_H

#include "../../config.h"

// place overrides here

#endif
\ No newline at end of file

A keyboards/maxipad/keymaps/default/keymap.c => keyboards/maxipad/keymaps/default/keymap.c +54 -0
@@ 0,0 1,54 @@
#include "maxipad.h"

const uint16_t PROGMEM keymaps[][MATRIX_ROWS][MATRIX_COLS] = {
[0] = KEYMAP( /* Base */
  KC_ESC,  KC_1,    KC_2,  KC_3,  KC_4,  KC_5, \
  KC_TAB,  KC_Q,    KC_W,  KC_E,  KC_R,  KC_T, \
  MO(1),   KC_A,    KC_S,  KC_D,  KC_F,  KC_G, \
  KC_LSFT, KC_Z,    KC_X,  KC_C,  KC_V,  KC_B, \
  KC_LCTL, KC_LALT, MO(1), KC_ENT,KC_GRV,KC_SPC \
),
[1] = KEYMAP(
  KC_GRV,  KC_F1, KC_F2, KC_F3, KC_F4, KC_F5, \
  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  \
),
};

const uint16_t PROGMEM fn_actions[] = {

};

const macro_t *action_get_macro(keyrecord_t *record, uint8_t id, uint8_t opt)
{
  // MACRODOWN only works in this function
      switch(id) {
        case 0:
          if (record->event.pressed) {
            register_code(KC_RSFT);
          } else {
            unregister_code(KC_RSFT);
          }
        break;
      }
    return MACRO_NONE;
};


void matrix_init_user(void) {

}

void matrix_scan_user(void) {

}

bool process_record_user(uint16_t keycode, keyrecord_t *record) {
  return true;
}

void led_set_user(uint8_t usb_led) {

}
\ No newline at end of file

A keyboards/maxipad/keymaps/default/readme.md => keyboards/maxipad/keymaps/default/readme.md +1 -0
@@ 0,0 1,1 @@
# The default keymap for maxipad
\ No newline at end of file

A keyboards/maxipad/maxipad.c => keyboards/maxipad/maxipad.c +28 -0
@@ 0,0 1,28 @@
#include "maxipad.h"

void matrix_init_kb(void) {
	// put your keyboard start-up code here
	// runs once when the firmware starts up

	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_set_kb(uint8_t usb_led) {
	// put your keyboard LED indicator (ex: Caps Lock LED) toggling code here

	led_set_user(usb_led);
}

A keyboards/maxipad/maxipad.h => keyboards/maxipad/maxipad.h +25 -0
@@ 0,0 1,25 @@
#ifndef MAXIPAD_H
#define MAXIPAD_H

#include "quantum.h"

// This a shortcut to help you visually see your layout.
// The following is an example using the Planck MIT layout
// The first section contains all of the arguements
// The second converts the arguments into a two-dimensional array
#define KEYMAP( \
     k00, k01, k02, k03, k04, k05, \
     k10, k11, k12, k13, k14, k15, \
     k20, k21, k22, k23, k24, k25, \
     k30, k31, k32, k33, k34, k35, \
     k40, k41, k42, k43, k44, k45 \
) \
{ \
    { k00, k01, k02, k03, k04, k05 }, \
    { k10, k11, k12, k13, k14, k15 }, \
    { k20, k21, k22, k23, k24, k25 }, \
    { k30, k31, k32, k33, k34, k35 }, \
    { k40, k41, k42, k43, k44, k45} \
}

#endif

A keyboards/maxipad/readme.md => keyboards/maxipad/readme.md +28 -0
@@ 0,0 1,28 @@
maxipad keyboard firmware
======================

## Quantum MK Firmware

For the full Quantum feature list, see [the parent readme.md](/doc/readme.md).

## Building

Download or clone the whole firmware and navigate to the keyboards/maxipad folder. Once your dev env is setup, you'll be able to type `make` to generate your .hex - you can then use the Teensy Loader to program your .hex file. 

Depending on which keymap you would like to use, you will have to compile slightly differently.

### Default

To build with the default keymap, simply run `make`.

### Other Keymaps

Several version of keymap are available in advance but you are recommended to define your favorite layout yourself. To define your own keymap create a folder with the name of your keymap in the keymaps folder, and see keymap documentation (you can find in top readme.md) and existant keymap files.

To build the firmware binary hex file with a keymap just do `make` with `keymap` option like:

```
$ make keymap=[default|jack|<name>]
```

Keymaps follow the format **__keymap.c__** and are stored in folders in the `keymaps` folder, eg `keymaps/my_keymap/`
\ No newline at end of file