Add nano switch pad

keyboards/nano/config.h

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+/*
+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       0xCEEB
+#define PRODUCT_ID      0x0007
+#define DEVICE_VER      0x0001
+#define MANUFACTURER    di0ib
+#define PRODUCT         Nano
+#define DESCRIPTION     8 key microswitch board
+
+/* key matrix size */
+#define MATRIX_ROWS 2
+#define MATRIX_COLS 4
+
+/* ws2812 RGB LED */
+#define RGB_DI_PIN B1
+#define RGBLIGHT_TIMER
+#define RGBLIGHT_ANIMATIONS
+#define RGBLED_NUM 6    // Number of LEDs
+#define ws2812_PORTREG  PORTD
+#define ws2812_DDRREG   DDRD
+
+/* COL2ROW or ROW2COL */
+#define DIODE_DIRECTION COL2ROW
+
+#define TAPPING_TERM 200
+
+#endif

keyboards/nano/keymaps/default/keymap.c

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+#include "nano.h"
+
+#define _MAIN 0
+#define _FN 1
+
+#define KC_ KC_TRNS
+#define KC_X0 LT(_FN, KC_ESC)
+#define KC_RTOG RGB_TOG
+#define KC_RMOD RGB_MOD
+#define KC_RHUI RGB_HUI
+#define KC_RHUD RGB_HUD
+
+const uint16_t PROGMEM keymaps[][MATRIX_ROWS][MATRIX_COLS] = {
+  [_MAIN] = KC_KEYMAP(
+     VOLU,MPLY,MPRV,PGUP,
+     VOLD,MUTE,MNXT,PGDN
+  ),
+
+  [_FN] = KC_KEYMAP(
+      F  ,    ,RHUI,    ,
+     RTOG,RMOD,RHUD,    
+  )
+};

keyboards/nano/keymaps/default/rules.mk

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

keyboards/nano/matrix.c

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+/*
+
+Note for ErgoDox EZ customizers: Here be dragons!
+This is not a file you want to be messing with.
+All of the interesting stuff for you is under keymaps/ :)
+Love, Erez
+
+Copyright 2013 Oleg Kostyuk <cub.uanic@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 <util/delay.h>
+#include "action_layer.h"
+#include "print.h"
+#include "debug.h"
+#include "util.h"
+#include "matrix.h"
+#include "nano.h"
+#include <string.h>
+
+/* matrix state(1:on, 0:off) */
+static matrix_row_t matrix[MATRIX_ROWS];
+static matrix_row_t matrix_stage[MATRIX_ROWS];
+static matrix_row_t matrix_debouncing[MATRIX_ROWS];
+
+static uint16_t debouncing_time;
+static bool debouncing = false;
+
+__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)
+{
+
+    DDRF  &= ~(1<<4 | 1<<5 | 1<<6 | 1<<7);
+    PORTF |=  (1<<4 | 1<<5 | 1<<6 | 1<<7);
+    DDRC  &= ~(1<<6);
+    PORTC |=  (1<<6);
+    DDRD  &= ~(1<<0 | 1<<1 | 1<<4);
+    PORTD |=  (1<<0 | 1<<1 | 1<<4);
+
+    for (uint8_t i = 0; i < MATRIX_ROWS; i++) {
+        matrix[i] = 0;
+        matrix_debouncing[i] = 0;
+        matrix_stage[i] = 0;
+    }
+
+    matrix_init_quantum();
+
+}
+
+uint8_t matrix_scan(void)
+{
+    matrix_stage[0] =
+        (PINF&(1<<4) ? 0 : (1<<0)) |
+        (PINF&(1<<5) ? 0 : (1<<1)) |
+        (PINF&(1<<6) ? 0 : (1<<2)) |
+        (PINF&(1<<7) ? 0 : (1<<3));
+    matrix_stage[1] =
+        (PIND&(1<<1) ? 0 : (1<<0)) |
+        (PIND&(1<<0) ? 0 : (1<<1)) |
+        (PIND&(1<<4) ? 0 : (1<<2)) |
+        (PINC&(1<<6) ? 0 : (1<<3));
+
+    if (memcmp(matrix_debouncing, matrix_stage, sizeof(matrix)) != 0) {
+        debouncing = true;
+        debouncing_time = timer_read();
+    }
+
+    matrix_debouncing[0] = matrix_stage[0];
+    matrix_debouncing[1] = matrix_stage[1];
+
+    if (debouncing && (timer_elapsed(debouncing_time) > 20)) {
+        for (uint8_t i = 0; i < MATRIX_ROWS; i++) {
+            matrix[i] = matrix_debouncing[i];
+        }
+        debouncing = false;
+    }
+
+    matrix_scan_quantum();
+
+    return 1;
+}
+
+bool matrix_is_modified(void)
+{
+    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)
+{
+}
+
+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;
+}
+

keyboards/nano/nano.c

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+#include "nano.h"
+
+void matrix_init_kb(void) {
+	matrix_init_user();
+}

keyboards/nano/nano.h

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+#ifndef NANO_H
+#define NANO_H
+
+#include "quantum.h"
+
+#define KC_KEYMAP(k01, k02, k03, k04, k05, k06, k07, k08) \
+{ \
+    {KC_##k01, KC_##k02, KC_##k03, KC_##k04}, \
+    {KC_##k05, KC_##k06, KC_##k07, KC_##k08} \
+}
+
+#endif

keyboards/nano/readme.md

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+Nano
+====
+
+A 2x4 mini switch pad built using 6mm x 6mm tactile switches and a Pro Micro. [More info here.](http://www.40percent.club/2016/12/nano-tmk.html)
+
+Keyboard Maintainer: [di0ib](https://github.com/di0ib)  
+Hardware Supported: Pro Micro ATmega32U4  
+Hardware Availability: [PCB Files](https://github.com/di0ib/tmk_keyboard/tree/master/keyboard/nano/pcb)
+
+Make example for this keyboard (after setting up your build environment):
+
+    make nano:default
+
+See [build environment setup](https://docs.qmk.fm/build_environment_setup.html) then the [make instructions](https://docs.qmk.fm/make_instructions.html) for more information.

keyboards/nano/rules.mk

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+SRC = matrix.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 = no         # 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 = yes        # Unicode
+BLUETOOTH_ENABLE = no       # Enable Bluetooth with the Adafruit EZ-Key HID
+RGBLIGHT_ENABLE = yes       # Enable WS2812 RGB underlight.
+
+# 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