Added NerD 60% support

README.md

@@ -54,6 +54,7 @@ You can find some keyboard specific projects under `converter` and `keyboard` di
 * [KMAC](keyboard/kmac/)                    - Korean custom keyboard
 * [Lightsaber](keyboard/lightsaber/)        - Korean custom keyboard
 * [Infinity](keyboard/infinity/)            - Massdrop [Infinity keyboard][Infinity]
+* [NerD](keyboard/nerd/)                    - Korean custom keyboard
 
 [GH_macway]:    http://geekhack.org/showwiki.php?title=Island:11930
 [GH_hhkb]:      http://geekhack.org/showwiki.php?title=Island:12047

keyboard/nerd/Makefile

@@ -0,0 +1,123 @@
+#----------------------------------------------------------------------------
+# On command line:
+#
+# make all = Make software.
+#
+# make clean = Clean out built project files.
+#
+# make coff = Convert ELF to AVR COFF.
+#
+# make extcoff = Convert ELF to AVR Extended COFF.
+#
+# make program = Download the hex file to the device.
+#                Please customize your programmer settings(PROGRAM_CMD)
+#
+# make teensy = Download the hex file to the device, using teensy_loader_cli.
+#               (must have teensy_loader_cli installed).
+#
+# make dfu = Download the hex file to the device, using dfu-programmer (must
+#            have dfu-programmer installed).
+#
+# make flip = Download the hex file to the device, using Atmel FLIP (must
+#             have Atmel FLIP installed).
+#
+# make dfu-ee = Download the eeprom file to the device, using dfu-programmer
+#               (must have dfu-programmer installed).
+#
+# make flip-ee = Download the eeprom file to the device, using Atmel FLIP
+#                (must have Atmel FLIP installed).
+#
+# make debug = Start either simulavr or avarice as specified for debugging, 
+#              with avr-gdb or avr-insight as the front end for debugging.
+#
+# make filename.s = Just compile filename.c into the assembler code only.
+#
+# make filename.i = Create a preprocessed source file for use in submitting
+#                   bug reports to the GCC project.
+#
+# To rebuild project do "make clean" then "make all".
+#----------------------------------------------------------------------------
+
+# Target file name (without extension).
+TARGET = nerd_lufa
+
+# Directory common source filess exist
+TOP_DIR = ../..
+
+# Directory keyboard dependent files exist
+TARGET_DIR = .
+
+# project specific files
+SRC =	keymap_common.c \
+	matrix.c \
+	backlight.c \
+	led.c \
+	keymap_ansi150.c
+
+CONFIG_H = config.h
+
+# MCU name
+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 = 8000000
+
+#
+# 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)
+
+# 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
+#   comment out to disable the options.
+#
+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
+#SLEEP_LED_ENABLE = yes  # Breathing sleep LED during USB suspend
+#NKRO_ENABLE = yes	# USB Nkey Rollover - not yet supported in LUFA
+BACKLIGHT_ENABLE = yes  # Enable keyboard backlight functionality
+
+# Search Path
+VPATH += $(TARGET_DIR)
+VPATH += $(TOP_DIR)
+
+include $(TOP_DIR)/protocol/lufa.mk
+include $(TOP_DIR)/common.mk
+include $(TOP_DIR)/rules.mk
+
+winkey: OPT_DEFS += -DLAYOUT_WINKEY
+winkey: all

keyboard/nerd/README.md

@@ -0,0 +1,45 @@
+NerD keyboard firmware
+========================
+
+Korean Keyboard designed by GON.
+
+*Note that this is not the official firmware*
+
+
+Hardware revision
+-----------------
+
+This firmware was developed and tested for NerD pcb version 1.61 and 2.0.
+
+
+Supported features
+------------------
+
+* All layout options are supported
+* All leds are supported
+
+
+Changing Bootloader
+-------------------
+
+You can't simply just upload this firmware to a new NerD board because the original
+bootloader won't accept DFU connections.
+
+You can change the bootloader of the keyboard with an ISP programmer of your choice.
+The bootloader pins are easy to access on the NerD pcb.
+
+*Be aware that after changing the bootloader the official configuration software
+won't work anymore and you'll lose your warrenty. GON won't provide any support for this firmware.*
+
+
+Build
+-----
+
+Move to this directory then just run `make`.
+
+
+Jump to Bootloader
+------------------
+
+You can jump to bootloader by software if you have a macro defined for this in your keymap. The
+default command is (LSFT+RSFT+PAUS) to access the bootloader by software jump.

keyboard/nerd/backlight.c

@@ -0,0 +1,75 @@
+/*
+Copyright 2014 Ralf Schmitt <ralf@bunkertor.net>
+
+This program is free software: you can redistribute it and/or modify
+it under the terms of the GNU General Public License as published by
+the Free Software Foundation, either version 2 of the License, or
+(at your option) any later version.
+
+This program is distributed in the hope that it will be useful,
+but WITHOUT ANY WARRANTY; without even the implied warranty of
+MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+GNU General Public License for more details.
+
+You should have received a copy of the GNU General Public License
+along with this program.  If not, see <http://www.gnu.org/licenses/>.
+*/
+
+#include <avr/io.h>
+#include "backlight.h"
+
+void backlight_init_ports()
+{
+    DDRB |= 0b11100000; // PB7 (switch), PB6 (pcb), PB5 (caps)
+}
+
+void backlight_set(uint8_t level)
+{
+    (level & BACKLIGHT_SWITCH) ? backlight_switch_enable() : backlight_switch_disable();
+    (level & BACKLIGHT_PCB) ? backlight_pcb_enable() : backlight_pcb_disable();
+}
+
+void backlight_switch_enable()
+{
+    PORTB |= 0b10000000;
+}
+
+void backlight_switch_disable()
+{
+    PORTB &= ~0b10000000;
+}
+
+void backlight_switch_invert()
+{
+    PORTB ^= 0b10000000;
+}
+
+void backlight_pcb_enable()
+{
+    PORTB |= 0b01000000;
+}
+
+void backlight_pcb_disable()
+{
+    PORTB &= ~0b01000000;
+}
+
+void backlight_pcb_invert()
+{
+    PORTB ^= 0b01000000;
+}
+
+void backlight_caps_enable()
+{
+    PORTB |= 0b00100000;
+}
+
+void backlight_caps_disable()
+{
+    PORTB &= ~0b00100000;
+}
+
+void backlight_caps_invert()
+{
+    PORTB ^= 0b00100000;
+}

keyboard/nerd/backlight.h

@@ -0,0 +1,40 @@
+/*
+Copyright 2014 Ralf Schmitt <ralf@bunkertor.net>
+
+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 BACKLIGHT_H
+#define BACKLIGHT_H
+
+enum backlight_level {
+    BACKLIGHT_SWITCH = 0b0000001,
+    BACKLIGHT_PCB    = 0b0000010,
+};
+
+void backlight_init_ports(void);
+
+void backlight_switch_invert(void);
+void backlight_switch_enable(void);
+void backlight_switch_disable(void);
+
+void backlight_pcb_invert(void);
+void backlight_pcb_enable(void);
+void backlight_pcb_disable(void);
+
+void backlight_caps_invert(void);
+void backlight_caps_enable(void);
+void backlight_caps_disable(void);
+
+#endif // BACKLIGHT_H

keyboard/nerd/config.h

@@ -0,0 +1,49 @@
+/*
+Copyright 2014 Ralf Schmitt <ralf@bunkertor.net>
+
+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
+
+/* USB Device descriptor parameter */
+#define VENDOR_ID       0xFEED
+#define PRODUCT_ID      0x6060
+#define DEVICE_VER      0x0001
+#define MANUFACTURER    GON
+#define PRODUCT         NerD
+#define DESCRIPTION     t.m.k. keyboard firmware for NerD
+
+/* key matrix size */
+#define MATRIX_ROWS 8
+#define MATRIX_COLS 10
+
+/* Set 0 if debouncing isn't needed */
+#define DEBOUNCE    5
+
+/* number of backlight levels */
+#define BACKLIGHT_LEVELS 2
+
+/* 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)) \
+)
+
+#endif

keyboard/nerd/keymap_ansi150.c

@@ -0,0 +1,39 @@
+#include "keymap_common.h"
+#include "action_layer.h"
+#include "backlight.h"
+
+const uint8_t PROGMEM keymaps[][MATRIX_ROWS][MATRIX_COLS] = {
+    /* Layer 0: Default */
+    KEYMAP_ANSI150(GRV, 1,   2,   3,   4,   5,   6,   7,   8,   9,   0,   MINS,EQL, BSPC, \
+                   TAB, Q,   W,   E,   R,   T,   Y,   U,   I,   O,   P,   LBRC,RBRC,BSLS, \
+                   ESC, A,   S,   D,   F,   G,   H,   J,   K,   L,   SCLN,QUOT,     ENT,  \
+                   LSFT,     Z,   X,   C,   V,   B,   N,   M,   COMM,DOT, SLSH,RSFT,      \
+                   LCTL,LGUI,LALT,          SPC,                          RALT,FN0 ,RCTL),
+    /* Layer 1: Arrow keys */
+    KEYMAP_ANSI150(TRNS,TRNS,TRNS,TRNS,TRNS,TRNS,TRNS,TRNS,TRNS,TRNS,TRNS,TRNS,TRNS,TRNS, \
+                   TRNS,TRNS,TRNS,TRNS,TRNS,TRNS,TRNS,TRNS,TRNS,TRNS,TRNS,TRNS,TRNS,TRNS, \
+                   TRNS,TRNS,TRNS,TRNS,TRNS,TRNS,TRNS,TRNS,TRNS,TRNS,TRNS,TRNS,     TRNS, \
+                   UP,       TRNS,TRNS,TRNS,TRNS,TRNS,TRNS,TRNS,TRNS,TRNS,TRNS,TRNS,      \
+                   LEFT,DOWN,RGHT,          TRNS,                         TRNS,TRNS,TRNS),
+    /* Layer 2: Space Fn */
+    KEYMAP_ANSI150(TRNS,TRNS,TRNS,TRNS,TRNS,TRNS,TRNS,TRNS,TRNS,TRNS,TRNS,TRNS,TRNS,TRNS, \
+                   TRNS,TRNS,TRNS,TRNS,TRNS,TRNS,TRNS,TRNS,TRNS,TRNS,TRNS,TRNS,TRNS,TRNS, \
+                   TRNS,TRNS,TRNS,TRNS,TRNS,TRNS,TRNS,TRNS,TRNS,TRNS,TRNS,TRNS,     TRNS, \
+                   TRNS,     TRNS,TRNS,TRNS,TRNS,TRNS,TRNS,TRNS,TRNS,TRNS,TRNS,TRNS,      \
+                   TRNS,TRNS,TRNS,          FN1,                          TRNS,TRNS,TRNS),
+    /* Layer 3: Functions */
+    KEYMAP_ANSI150(SLEP,F1,  F2,  F3,  F4,  F5,  F6,  F7,  F8,  F9,  F10, F11, F12, FN4,  \
+                   TRNS,TRNS,UP,  END, PSCR,SLCK,BRK, TRNS,INS, HOME,TRNS,VOLD,VOLU,FN5,  \
+                   CAPS,LEFT,DOWN,RGHT,PGDN,TRNS,LEFT,DOWN,UP  ,RGHT,TRNS,TRNS,     TRNS, \
+                   TRNS,     TRNS,DEL, TRNS,TRNS,PGUP,TRNS,TRNS,TRNS,TRNS,TRNS,TRNS,      \
+                   MPRV,MPLY,MNXT,          TRNS,                          FN2,TRNS,FN3),
+};
+
+const uint16_t PROGMEM fn_actions[] = {
+    [0] = ACTION_LAYER_MOMENTARY(3),                // Switch to function layer
+    [1] = ACTION_LAYER_TAP_KEY(3, KC_SPACE),        // Switch to function layer (Space Fn)
+    [2] = ACTION_LAYER_TOGGLE(1),                   // Toggle "Arrow keys" layer
+    [3] = ACTION_LAYER_TOGGLE(2),                   // Toggle "Space fn" layer
+    [4] = ACTION_BACKLIGHT_LEVEL(BACKLIGHT_SWITCH), // Toggle switch leds
+    [5] = ACTION_BACKLIGHT_LEVEL(BACKLIGHT_PCB),    // Toggle pcb leds
+};

keyboard/nerd/keymap_common.c

@@ -0,0 +1,29 @@
+/*
+Copyright 2014 Ralf Schmitt <ralf@bunkertor.net>
+
+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 "keymap_common.h"
+
+/* translates key to keycode */
+uint8_t keymap_key_to_keycode(uint8_t layer, keypos_t key)
+{
+    return pgm_read_byte(&keymaps[(layer)][(key.row)][(key.col)]);
+}
+
+/* translates Fn keycode to action */
+action_t keymap_fn_to_action(uint8_t keycode)
+{
+    return (action_t){ .code = pgm_read_word(&fn_actions[FN_INDEX(keycode)]) };
+}

keyboard/nerd/keymap_common.h

@@ -0,0 +1,67 @@
+/*
+Copyright 2014 Ralf Schmitt <ralf@bunkertor.net>
+
+This program is free software: you can redistribute it and/or modify
+it under the terms of the GNU General Public License as published by
+the Free Software Foundation, either version 2 of the License, or
+(at your option) any later version.
+
+This program is distributed in the hope that it will be useful,
+but WITHOUT ANY WARRANTY; without even the implied warranty of
+MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+GNU General Public License for more details.
+
+You should have received a copy of the GNU General Public License
+along with this program.  If not, see <http://www.gnu.org/licenses/>.
+*/
+
+#ifndef KEYMAP_COMMON_H
+#define KEYMAP_COMMON_H
+
+#include <stdint.h>
+#include <avr/pgmspace.h>
+#include "keycode.h"
+#include "action.h"
+#include "action_macro.h"
+#include "report.h"
+#include "host.h"
+#include "print.h"
+#include "debug.h"
+#include "keymap.h"
+
+extern const uint8_t keymaps[][MATRIX_ROWS][MATRIX_COLS];
+extern const uint16_t fn_actions[];
+
+#define KEYMAP( \
+        K08, K01, K10, K11, K20, K21, K30, K31, K40, K41, K50, K51, K60, K61, \
+        K02, K03, K12, K13, K22, K23, K32, K33, K42, K43, K52, K53, K62, K63, \
+        K04, K14, K15, K24, K25, K34, K35, K44, K45, K54, K55, K64, K71, K65, \
+        K07, K79, K16, K17, K26, K27, K36, K37, K46, K47, K56, K57, K66, K67, \
+        K06, K05, K78,                K70,                K72, K73, K74, K75  \
+) { \
+/*          0         1         2         3         4         5         6         7         8         9      */\
+/* 0 */ { KC_NO,    KC_##K01, KC_##K02, KC_##K03, KC_##K04, KC_##K05, KC_##K06, KC_##K07, KC_##K08, KC_NO },   \
+/* 1 */ { KC_##K10, KC_##K11, KC_##K12, KC_##K13, KC_##K14, KC_##K15, KC_##K16, KC_##K17, KC_NO,    KC_NO },   \
+/* 2 */ { KC_##K20, KC_##K21, KC_##K22, KC_##K23, KC_##K24, KC_##K25, KC_##K26, KC_##K27, KC_NO,    KC_NO },   \
+/* 3 */ { KC_##K30, KC_##K31, KC_##K32, KC_##K33, KC_##K34, KC_##K35, KC_##K36, KC_##K37, KC_NO,    KC_NO },   \
+/* 4 */ { KC_##K40, KC_##K41, KC_##K42, KC_##K43, KC_##K44, KC_##K45, KC_##K46, KC_##K47, KC_NO,    KC_NO },   \
+/* 5 */ { KC_##K50, KC_##K51, KC_##K52, KC_##K53, KC_##K54, KC_##K55, KC_##K56, KC_##K57, KC_NO,    KC_NO },   \
+/* 6 */ { KC_##K60, KC_##K61, KC_##K62, KC_##K63, KC_##K64, KC_##K65, KC_##K66, KC_##K67, KC_NO,    KC_NO },   \
+/* 7 */ { KC_##K70, KC_##K71, KC_##K72, KC_##K73, KC_##K74, KC_##K75, KC_NO,    KC_NO,    KC_##K78, KC_##K79 } \
+}
+
+#define KEYMAP_ANSI150( \
+        K08, K01, K10, K11, K20, K21, K30, K31, K40, K41, K50, K51, K60, K61, \
+        K02, K03, K12, K13, K22, K23, K32, K33, K42, K43, K52, K53, K62, K63, \
+        K04, K14, K15, K24, K25, K34, K35, K44, K45, K54, K55, K64,      K65, \
+        K07,      K16, K17, K26, K27, K36, K37, K46, K47, K56, K57, K66,      \
+        K06, K05, K78,                K70,                     K73, K74, K75  \
+) KEYMAP( \
+        K08, K01, K10, K11, K20, K21, K30, K31, K40, K41, K50, K51, K60, K61, \
+        K02, K03, K12, K13, K22, K23, K32, K33, K42, K43, K52, K53, K62, K63, \
+        K04, K14, K15, K24, K25, K34, K35, K44, K45, K54, K55, K64, NO,  K65, \
+        K07, NO,  K16, K17, K26, K27, K36, K37, K46, K47, K56, K57, K66, NO,  \
+        K06, K05, K78,                K70,                NO,  K73, K74, K75  \
+)
+
+#endif // KEYMAP_COMMON_H

keyboard/nerd/led.c

@@ -0,0 +1,25 @@
+/*
+Copyright 2014 Ralf Schmitt <ralf@bunkertor.net>
+
+This program is free software: you can redistribute it and/or modify
+it under the terms of the GNU General Public License as published by
+the Free Software Foundation, either version 2 of the License, or
+(at your option) any later version.
+
+This program is distributed in the hope that it will be useful,
+but WITHOUT ANY WARRANTY; without even the implied warranty of
+MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+GNU General Public License for more details.
+
+You should have received a copy of the GNU General Public License
+along with this program.  If not, see <http://www.gnu.org/licenses/>.
+*/
+
+#include <avr/io.h>
+#include "stdint.h"
+#include "led.h"
+
+void led_set(uint8_t usb_led)
+{
+    (usb_led & (1<<USB_LED_CAPS_LOCK)) ? backlight_caps_enable() : backlight_caps_disable();
+}

keyboard/nerd/matrix.c

@@ -0,0 +1,220 @@
+/*
+Copyright 2014 Ralf Schmitt <ralf@bunkertor.net>
+
+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 <stdint.h>
+#include <stdbool.h>
+#include <avr/io.h>
+#include <util/delay.h>
+#include "print.h"
+#include "debug.h"
+#include "util.h"
+#include "matrix.h"
+#include "backlight.h"
+
+
+#ifndef DEBOUNCE
+#   define DEBOUNCE 5
+#endif
+static uint8_t debouncing = DEBOUNCE;
+
+/* matrix state(1:on, 0:off) */
+static matrix_row_t matrix[MATRIX_ROWS];
+static matrix_row_t matrix_debouncing[MATRIX_ROWS];
+
+static uint16_t read_inputs(void);
+static void init_inputs(void);
+static void init_outputs(void);
+static void reset_inputs(void);
+static void reset_outputs(void);
+static void select_output(uint8_t col);
+
+inline
+uint8_t matrix_rows(void)
+{
+    return MATRIX_ROWS;
+}
+
+inline
+uint8_t matrix_cols(void)
+{
+    return MATRIX_COLS;
+}
+
+void matrix_init(void)
+{
+    backlight_init_ports();
+    init_inputs();
+    init_outputs();
+
+    for (uint8_t i=0; i < MATRIX_ROWS; i++) {
+        matrix[i] = 0;
+        matrix_debouncing[i] = 0;
+    }
+}
+
+uint8_t matrix_scan(void)
+{
+    for (uint8_t col = 0; col < MATRIX_COLS; col++) {
+        reset_inputs();
+        reset_outputs();
+        select_output(col);
+        _delay_us(3);
+        uint16_t rows = read_inputs();
+        for (uint8_t row = 0; row < MATRIX_ROWS; row++) {
+            bool prev_bit = matrix_debouncing[row] & ((matrix_row_t)1<<col);
+            bool curr_bit = rows & (1<<row);
+            if (prev_bit != curr_bit) {
+                matrix_debouncing[row] ^= ((matrix_row_t)1<<col);
+                if (debouncing) {
+                    dprint("bounce!: "); dprintf("%02X", debouncing); dprintln();
+                }
+                debouncing = DEBOUNCE;
+            }
+        }
+    }
+
+    if (debouncing) {
+        if (--debouncing) {
+            _delay_ms(1);
+        } else {
+            for (uint8_t i = 0; i < MATRIX_ROWS; i++) {
+                matrix[i] = matrix_debouncing[i];
+            }
+        }
+    }
+
+    return 1;
+}
+
+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_inputs(void)
+{
+    DDRE &= ~0b01000000; // PE6 (Col 0)
+    DDRB &= ~0b00001111; // PB0 (Col 1), PB1 (Col 2), PB2 (Col 3), PB3 (Col 4)
+    DDRF &= ~0b00000001; // PF0 (Col 5)
+    DDRD &= ~0b00100001; // PD0 (Col 6), PD5 (Col 7)
+}
+
+static uint16_t read_inputs(void)
+{
+    return (PINE&(1<<6) ? 0 : (1<<0)) |  // PE6 (Row 0)
+           (PINB&(1<<0) ? 0 : (1<<1)) |  // PB0 (Row 1)
+           (PINB&(1<<1) ? 0 : (1<<2)) |  // PB1 (Row 2)
+           (PINB&(1<<2) ? 0 : (1<<3)) |  // PB2 (Row 3)
+           (PINB&(1<<3) ? 0 : (1<<4)) |  // PB3 (Row 4)
+           (PINF&(1<<0) ? 0 : (1<<5)) |  // PF0 (Row 5)
+           (PIND&(1<<0) ? 0 : (1<<6)) |  // PD0 (Row 6)
+           (PIND&(1<<5) ? 0 : (1<<7));   // PD5 (Row 7)
+}
+
+static void reset_inputs(void)
+{
+    PORTE |= 0b01000000; // PE6 (Col 0)
+    PORTB |= 0b00001111; // PB0 (Col 1), PB1 (Col 2), PB2 (Col 3), PB3 (Col 4)
+    PORTF |= 0b00000001; // PF0 (Col 5)
+    PORTD |= 0b00100001; // PD0 (Col 6), PD5 (Col 7)
+}
+
+static void init_outputs(void)
+{
+    DDRB |= 0b00010000; // PB4 (Row 0)
+    DDRE |= 0b00000100; // PE2 (Row 1)
+    DDRF |= 0b11110010; // PF4 (Row 2), PF7 (Row 3), PF1 (Row 4), PF6 (Row 5), PF5 (Row 7)
+    DDRC |= 0b11000000; // PC6 (Row 6), PC7 (Row 9)
+    DDRD |= 0b10000000; // PD7 (Row 8)
+}
+
+static void reset_outputs(void)
+{
+    PORTB |= 0b00010000; // PB4 (Row 0)
+    PORTE |= 0b00000100; // PE2 (Row 1)
+    PORTF |= 0b11110010; // PF4 (Row 2), PF7 (Row 3), PF1 (Row 4), PF6 (Row 5), PF5 (Row 7)
+    PORTC |= 0b11000000; // PC6 (Row 6), PC7 (Row 9)
+    PORTD |= 0b10000000; // PD7 (Row 8)
+}
+
+static void select_output(uint8_t col)
+{
+    switch (col) {
+        case 0:
+            PORTB &= ~(1<<4);
+            break;
+        case 1:
+            PORTE &= ~(1<<2);
+            break;
+        case 2:
+            PORTF &= ~(1<<4);
+            break;
+        case 3:
+            PORTF &= ~(1<<7);
+            break;
+        case 4:
+            PORTF &= ~(1<<1);
+            break;
+        case 5:
+            PORTF &= ~(1<<6);
+            break;
+        case 6:
+            PORTC &= ~(1<<6);
+            break;
+        case 7:
+            PORTF &= ~(1<<5);
+            break;
+        case 8:
+            PORTD &= ~(1<<7);
+            break;
+        case 9:
+            PORTC &= ~(1<<7);
+            break;
+    }
+}