[Keyboard] Add X-Bows Knight_Plus Keyboard (#13221)

Co-authored-by: Drashna Jaelre <drashna@live.com>
This commit is contained in:
X-Bows Tech
2021-07-03 15:57:27 +08:00
committed by GitHub
parent 45dec4911c
commit 2af5d493e3
22 changed files with 1083 additions and 0 deletions

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/* Copyright 2021 Shulin Huang <mumu@x-bows.com>
*
* This program is free software: you can redistribute it and/or modify
* it under the terms of the GNU General Public License as published by
* the Free Software Foundation, either version 2 of the License, or
* (at your option) any later version.
*
* This program is distributed in the hope that it will be useful,
* but WITHOUT ANY WARRANTY; without even the implied warranty of
* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
* GNU General Public License for more details.
*
* You should have received a copy of the GNU General Public License
* along with this program. If not, see <http://www.gnu.org/licenses/>.
*/
#pragma once
#include "config_common.h"
#define VENDOR_ID 0xFEED
#define PRODUCT_ID 0x1228
#define DEVICE_VER 0x0001
#define MANUFACTURER X-BOWS
#define PRODUCT NUMPAD
#define MATRIX_ROWS 6
#define MATRIX_COLS 4
#define MATRIX_ROW_PINS { B5, B4, C6, B6, D7, B3 }
#define MATRIX_COL_PINS { D4, D6, B2, B1 }
#define DIODE_DIRECTION COL2ROW
#define DEBOUNCE 3
#ifdef RGB_MATRIX_ENABLE
# define RGB_MATRIX_LED_PROCESS_LIMIT 18
# define RGB_MATRIX_LED_FLUSH_LIMIT 16
# define RGB_DISABLE_AFTER_TIMEOUT 0 // number of ticks to wait until disabling effects
# define RGB_DISABLE_WHEN_USB_SUSPENDED true // turn off effects when suspended
# define RGB_MATRIX_KEYPRESSES
# define RGB_MATRIX_MAXIMUM_BRIGHTNESS 200
# define RGB_MATRIX_CENTER { 30, 32 }
# define DRIVER_ADDR_1 0b1110111
# define DRIVER_COUNT 1
# define DRIVER_1_LED_TOTAL 22
# define DRIVER_LED_TOTAL (DRIVER_1_LED_TOTAL)
#endif

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{
"keyboard_name": "NUMPAD",
"url": "",
"maintainer": "xbows-qmk",
"width": 4,
"height": 6.5,
"layouts": {
"LAYOUT": {
"layout": [
{"label":"Esc", "x":0, "y":0},
{"label":"Tab", "x":1, "y":0},
{"label":"Backspace", "x":2, "y":0},
{"label":"Fn", "x":3, "y":0},
{"label":"Num Lock", "x":0, "y":1.5},
{"label":"/", "x":1, "y":1.5},
{"label":"*", "x":2, "y":1.5},
{"label":"-", "x":3, "y":1.5},
{"label":"7", "x":0, "y":2.5},
{"label":"8", "x":1, "y":2.5},
{"label":"9", "x":2, "y":2.5},
{"label":"+", "x":3, "y":2.5},
{"label":"4", "x":0, "y":3.5},
{"label":"5", "x":1, "y":3.5},
{"label":"6", "x":2, "y":3.5},
{"label":"+", "x":3, "y":3.5},
{"label":"1", "x":0, "y":4.5},
{"label":"2", "x":1, "y":4.5},
{"label":"3", "x":2, "y":4.5},
{"label":"Enter", "x":3, "y":4.5, "h":2},
{"label":"0", "x":0, "y":5.5, "w":2},
{"label":".", "x":3, "y":5.5}
]
}
}
}

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/* Copyright 2021 Shulin Huang <mumu@x-bows.com>
*
* This program is free software: you can redistribute it and/or modify
* it under the terms of the GNU General Public License as published by
* the Free Software Foundation, either version 2 of the License, or
* (at your option) any later version.
*
* This program is distributed in the hope that it will be useful,
* but WITHOUT ANY WARRANTY; without even the implied warranty of
* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
* GNU General Public License for more details.
*
* You should have received a copy of the GNU General Public License
* along with this program. If not, see <http://www.gnu.org/licenses/>.
*/
#pragma once
#ifdef RGB_MATRIX_ENABLE
# define RGB_MATRIX_STARTUP_MODE RGB_MATRIX_CYCLE_LEFT_RIGHT // Sets the default mode, if none has been set
# define DISABLE_RGB_MATRIX_SOLID_COLOR // Static single hue, no speed support
# define DISABLE_RGB_MATRIX_GRADIENT_UP_DOWN // Static gradient top to bottom, speed controls how much gradient changes
# define DISABLE_RGB_MATRIX_BAND_SAT // Single hue band fading saturation scrolling left to right
# define DISABLE_RGB_MATRIX_BAND_VAL // Single hue band fading brightness scrolling left to right
# define DISABLE_RGB_MATRIX_BAND_PINWHEEL_SAT // Single hue 3 blade spinning pinwheel fades saturation
# define DISABLE_RGB_MATRIX_BAND_SPIRAL_VAT // Single hue spinning spiral fades saturation
# define DISABLE_RGB_MATRIX_CYCLE_OUT_IN_DUAL // Full dual gradients scrolling out to in
# define DISABLE_RGB_MATRIX_CYCLE_SPIRAL // Full gradient spinning spiral around center of keyboard
# define DISABLE_RGB_MATRIX_DIGITAL_RAIN // That famous computer simulation
# define DISABLE_RGB_MATRIX_TYPING_HEATMAP // How hot is your WPM!
# define DISABLE_RGB_MATRIX_SOLID_REACTIVE_WIDE // Hue & value pulse near a single key hit then fades value out
# define DISABLE_RGB_MATRIX_SOLID_REACTIVE_MULTIWIDE // Hue & value pulse near multiple key hits then fades value out
# define DISABLE_RGB_MATRIX_SOLID_REACTIVE_CROSS // Hue & value pulse the same column and row of a single key hit then fades value out
# define DISABLE_RGB_MATRIX_SOLID_REACTIVE_MULTICROSS // Hue & value pulse the same column and row of multiple key hits then fades value out
# define DISABLE_RGB_MATRIX_SOLID_REACTIVE_NEXUS // Hue & value pulse away on the same column and row of a single key hit then fades value out
# define DISABLE_RGB_MATRIX_SOLID_REACTIVE_MULTINEXUS // Hue & value pulse away on the same column and row of multiple key hits then fades value out
//# define DISABLE_RGB_MATRIX_SPLASH // Full gradient & value pulse away from a single key hit then fades value out
# define DISABLE_RGB_MATRIX_MULTISPLASH // Full gradient & value pulse away from multiple key hits then fades value out
# define DISABLE_RGB_MATRIX_SOLID_SPLASH // Hue & value pulse away from a single key hit then fades value out
//# define DISABLE_RGB_MATRIX_SOLID_MULTISPLASH // Hue & value pulse away from multiple key hits then fades value out
#endif

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/* Copyright 2021 Shulin Huang <mumu@x-bows.com>
*
* This program is free software: you can redistribute it and/or modify
* it under the terms of the GNU General Public License as published by
* the Free Software Foundation, either version 2 of the License, or
* (at your option) any later version.
*
* This program is distributed in the hope that it will be useful,
* but WITHOUT ANY WARRANTY; without even the implied warranty of
* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
* GNU General Public License for more details.
*
* You should have received a copy of the GNU General Public License
* along with this program. If not, see <http://www.gnu.org/licenses/>.
*/
#include QMK_KEYBOARD_H
const uint16_t PROGMEM keymaps[][MATRIX_ROWS][MATRIX_COLS] = {
/* Keymap VANILLA: (Base Layer) Default Layer
*
* |-------------------------------|
* | Esc | Tab | BS | Fn |
* |-------------------------------|
* | NUM | / | * | = |
* |-------------------------------|
* | 7 | 8 | 9 | - |
* |-------------------------------|
* | 4 | 5 | 6 | + |
* |-------------------------------|
* | 1 | 2 | 3 | ENTER |
* |-------------------------------|
* | 0 | . |
* |-----------------------|
*/
[0] = LAYOUT(
KC_ESC , KC_TAB, KC_BSPC, MO(1),
KC_NLCK, KC_PSLS, KC_PAST, KC_EQL,
KC_P7, KC_P8, KC_P9, KC_PMNS,
KC_P4, KC_P5, KC_P6, KC_PPLS,
KC_P1, KC_P2, KC_P3, KC_PENT,
KC_P0, KC_PDOT),
[1] = LAYOUT(
RESET, EEP_RST, KC_TRNS, KC_TRNS,
KC_CALC, KC_MYCM, KC_MSEL, KC_MAIL,
RGB_MOD, RGB_VAI, RGB_HUI, KC_VOLD,
RGB_SPD, RGB_TOG, RGB_SPI, KC_VOLU,
KC_TRNS, RGB_VAD, KC_TRNS, KC_TRNS,
KC_TRNS, KC_TRNS)
};

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/* Copyright 2021 Shulin Huang <mumu@x-bows.com>
*
* This program is free software: you can redistribute it and/or modify
* it under the terms of the GNU General Public License as published by
* the Free Software Foundation, either version 2 of the License, or
* (at your option) any later version.
*
* This program is distributed in the hope that it will be useful,
* but WITHOUT ANY WARRANTY; without even the implied warranty of
* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
* GNU General Public License for more details.
*
* You should have received a copy of the GNU General Public License
* along with this program. If not, see <http://www.gnu.org/licenses/>.
*/
#pragma once
#ifdef RGB_MATRIX_ENABLE
# define RGB_MATRIX_STARTUP_MODE RGB_MATRIX_CYCLE_LEFT_RIGHT // Sets the default mode, if none has been set
# define DISABLE_RGB_MATRIX_ALPHAS_MODS // Static dual hue, speed is hue for secondary hue
# define DISABLE_RGB_MATRIX_GRADIENT_UP_DOWN // Static gradient top to bottom, speed controls how much gradient changes
# define DISABLE_RGB_MATRIX_GRADIENT_LEFT_RIGHT // Static gradient left to right, speed controls how much gradient changes
//# define DISABLE_RGB_MATRIX_BREATHING // Single hue brightness cycling animation
# define DISABLE_RGB_MATRIX_BAND_SAT // Single hue band fading saturation scrolling left to right
# define DISABLE_RGB_MATRIX_BAND_VAL // Single hue band fading brightness scrolling left to right
# define DISABLE_RGB_MATRIX_BAND_PINWHEEL_SAT // Single hue 3 blade spinning pinwheel fades saturation
# define DISABLE_RGB_MATRIX_BAND_PINWHEEL_VAL // Single hue 3 blade spinning pinwheel fades brightness
# define DISABLE_RGB_MATRIX_BAND_SPIRAL_SAT // Single hue spinning spiral fades saturation
# define DISABLE_RGB_MATRIX_BAND_SPIRAL_VAL // Single hue spinning spiral fades brightness
//# define DISABLE_RGB_MATRIX_CYCLE_ALL // Full keyboard solid hue cycling through full gradient
//# define DISABLE_RGB_MATRIX_CYCLE_LEFT_RIGHT // Full gradient scrolling left to right
# define DISABLE_RGB_MATRIX_CYCLE_UP_DOWN // Full gradient scrolling top to bottom
//# define DISABLE_RGB_MATRIX_CYCLE_OUT_IN // Full gradient scrolling out to in
# define DISABLE_RGB_MATRIX_CYCLE_OUT_IN_DUAL // Full dual gradients scrolling out to in
# define DISABLE_RGB_MATRIX_RAINBOW_MOVING_CHEVRON // Full gradent Chevron shapped scrolling left to right
# define DISABLE_RGB_MATRIX_CYCLE_PINWHEEL // Full gradient spinning pinwheel around center of keyboard
# define DISABLE_RGB_MATRIX_CYCLE_SPIRAL // Full gradient spinning spiral around center of keyboard
# define DISABLE_RGB_MATRIX_DUAL_BEACON // Full gradient spinning around center of keyboard
//# define DISABLE_RGB_MATRIX_RAINBOW_BEACON // Full tighter gradient spinning around center of keyboard
# define DISABLE_RGB_MATRIX_RAINBOW_PINWHEELS // Full dual gradients spinning two halfs of keyboard
# define DISABLE_RGB_MATRIX_RAINDROPS // Randomly changes a single key's hue
# define DISABLE_RGB_MATRIX_JELLYBEAN_RAINDROPS // Randomly changes a single key's hue and saturation
//# define DISABLE_RGB_MATRIX_HUE_BREATHING // Hue shifts up a slight ammount at the same time, then shifts back
# define DISABLE_RGB_MATRIX_HUE_PENDULUM // Hue shifts up a slight ammount in a wave to the right, then back to the left
//# define DISABLE_RGB_MATRIX_HUE_WAVE // Hue shifts up a slight ammount and then back down in a wave to the right
# define DISABLE_RGB_MATRIX_DIGITAL_RAIN // That famous computer simulation
# define DISABLE_RGB_MATRIX_TYPING_HEATMAP // How hot is your WPM!
//# define DISABLE_RGB_MATRIX_SOLID_REACTIVE_SIMPLE // Pulses keys hit to hue & value then fades value out
//# define DISABLE_RGB_MATRIX_SOLID_REACTIVE // Static single hue, pulses keys hit to shifted hue then fades to current hue
# define DISABLE_RGB_MATRIX_SOLID_REACTIVE_WIDE // Hue & value pulse near a single key hit then fades value out
# define DISABLE_RGB_MATRIX_SOLID_REACTIVE_MULTIWIDE // Hue & value pulse near multiple key hits then fades value out
# define DISABLE_RGB_MATRIX_SOLID_REACTIVE_CROSS // Hue & value pulse the same column and row of a single key hit then fades value out
# define DISABLE_RGB_MATRIX_SOLID_REACTIVE_MULTICROSS // Hue & value pulse the same column and row of multiple key hits then fades value out
# define DISABLE_RGB_MATRIX_SOLID_REACTIVE_NEXUS // Hue & value pulse away on the same column and row of a single key hit then fades value out
# define DISABLE_RGB_MATRIX_SOLID_REACTIVE_MULTINEXUS // Hue & value pulse away on the same column and row of multiple key hits then fades value out
//# define DISABLE_RGB_MATRIX_SPLASH // Full gradient & value pulse away from a single key hit then fades value out
# define DISABLE_RGB_MATRIX_MULTISPLASH // Full gradient & value pulse away from multiple key hits then fades value out
# define DISABLE_RGB_MATRIX_SOLID_SPLASH // Hue & value pulse away from a single key hit then fades value out
//# define DISABLE_RGB_MATRIX_SOLID_MULTISPLASH // Hue & value pulse away from multiple key hits then fades value out
#endif

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/* Copyright 2021 Shulin Huang <mumu@x-bows.com>
*
* This program is free software: you can redistribute it and/or modify
* it under the terms of the GNU General Public License as published by
* the Free Software Foundation, either version 2 of the License, or
* (at your option) any later version.
*
* This program is distributed in the hope that it will be useful,
* but WITHOUT ANY WARRANTY; without even the implied warranty of
* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
* GNU General Public License for more details.
*
* You should have received a copy of the GNU General Public License
* along with this program. If not, see <http://www.gnu.org/licenses/>.
*/
#include QMK_KEYBOARD_H
const uint16_t PROGMEM keymaps[][MATRIX_ROWS][MATRIX_COLS] = {
/* Keymap VANILLA: (Base Layer) Default Layer
*
* |-------------------------------|
* | Esc | Tab | BS | Fn |
* |-------------------------------|
* | NUM | / | * | = |
* |-------------------------------|
* | 7 | 8 | 9 | - |
* |-------------------------------|
* | 4 | 5 | 6 | + |
* |-------------------------------|
* | 1 | 2 | 3 | ENTER |
* |-------------------------------|
* | 0 | . |
* |-----------------------|
*/
[0] = LAYOUT(
KC_ESC , KC_TAB, KC_BSPC, MO(1),
KC_NLCK, KC_PSLS, KC_PAST, KC_EQL,
KC_P7, KC_P8, KC_P9, KC_PMNS,
KC_P4, KC_P5, KC_P6, KC_PPLS,
KC_P1, KC_P2, KC_P3, KC_PENT,
KC_P0, KC_PDOT),
[1] = LAYOUT(
RESET, EEP_RST, KC_TRNS, KC_TRNS,
KC_CALC, KC_MYCM, KC_MSEL, KC_MAIL,
RGB_MOD, RGB_VAI, RGB_HUI, KC_VOLD,
RGB_SPD, RGB_TOG, RGB_SPI, KC_VOLU,
KC_TRNS, RGB_VAD, KC_TRNS, KC_TRNS,
KC_TRNS, KC_TRNS),
[2] = LAYOUT(
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),
[3] = LAYOUT(
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)
};

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VIA_ENABLE = yes

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/* Copyright 2021 Shulin Huang <mumu@x-bows.com>
*
* This program is free software: you can redistribute it and/or modify
* it under the terms of the GNU General Public License as published by
* the Free Software Foundation, either version 2 of the License, or
* (at your option) any later version.
*
* This program is distributed in the hope that it will be useful,
* but WITHOUT ANY WARRANTY; without even the implied warranty of
* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
* GNU General Public License for more details.
*
* You should have received a copy of the GNU General Public License
* along with this program. If not, see <http://www.gnu.org/licenses/>.
*/
#include "numpad.h"
#ifdef RGB_MATRIX_ENABLE
const is31_led g_is31_leds[DRIVER_LED_TOTAL] = {
{0, C3_3, C2_3, C1_3}, // L01
{0, C3_4, C2_4, C1_4}, // L02
{0, C9_5, C8_5, C7_5}, // L03
{0, C9_6, C8_6, C7_6}, // L04
{0, C6_1, C5_1, C4_1}, // L05
{0, C6_2, C5_2, C4_2}, // L06
{0, C6_3, C5_3, C4_3}, // L07
{0, C6_6, C5_6, C4_6}, // L08
{0, C9_1, C8_1, C7_1}, // L09
{0, C9_2, C8_2, C7_2}, // L10
{0, C9_3, C8_3, C7_3}, // L11
{0, C9_4, C8_4, C7_4}, // L12
{0, C3_11, C2_11, C1_11}, // L13
{0, C3_12, C2_12, C1_12}, // L14
{0, C3_13, C2_13, C1_13}, // L15
{0, C3_14, C2_14, C1_14}, // L16
{0, C6_9, C5_9, C4_9}, // L17
{0, C6_10, C5_10, C4_10}, // L18
{0, C6_11, C5_11, C4_11}, // L19
{0, C6_14, C5_14, C4_14}, // L20
{0, C6_16, C5_16, C4_16}, // L21
{0, C6_15, C5_15, C4_15}, // L22
};
led_config_t g_led_config = { {
{ 0, 1, 2, 3 },
{ 4, 5, 6, 7 },
{ 8, 9, 10, 11 },
{ 12, 13, 14, 15 },
{ 16, 17, 18, 19 },
{ 20, NO_LED, 21, NO_LED}
}, {
{0,0}, {20,0}, {40,0}, {60,0},
{0,13}, {20,13}, {40,13}, {60,13},
{0,25}, {20,25}, {40,25}, {60,25},
{0,38}, {20,38}, {40,38}, {60,38},
{0,50}, {20,50}, {40,50}, {60,57},
{10,63}, {40,63}
}, {
4, 4, 4, 4,
4, 4, 4, 4,
4, 4, 4, 4,
4, 4, 4, 4,
4, 4, 4, 4,
4, 4,
} };
__attribute__ ((weak)) void rgb_matrix_indicators_user(void) {
if (host_keyboard_led_state().num_lock) {
rgb_matrix_set_color(4, 0xFF, 0xFF, 0xFF);
}
}
#endif

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/* Copyright 2021 Shulin Huang <mumu@x-bows.com>
*
* This program is free software: you can redistribute it and/or modify
* it under the terms of the GNU General Public License as published by
* the Free Software Foundation, either version 2 of the License, or
* (at your option) any later version.
*
* This program is distributed in the hope that it will be useful,
* but WITHOUT ANY WARRANTY; without even the implied warranty of
* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
* GNU General Public License for more details.
*
* You should have received a copy of the GNU General Public License
* along with this program. If not, see <http://www.gnu.org/licenses/>.
*/
#pragma once
#include "quantum.h"
#define LAYOUT( \
K000, K001, K002, K003, \
K100, K101, K102, K103, \
K200, K201, K202, K203, \
K300, K301, K302, K303, \
K400, K401, K402, K403, \
K500, K502 \
) \
{ \
{ K000, K001, K002, K003 }, \
{ K100, K101, K102, K103 }, \
{ K200, K201, K202, K203 }, \
{ K300, K301, K302, K303 }, \
{ K400, K401, K402, K403 }, \
{ K500, KC_NO,K502, KC_NO} \
}

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# NUMPAD
![NUMPAD](https://cdn.shopifycdn.net/s/files/1/0014/7623/1237/products/BestSeller_8_1024x1024@2x.png?v=1616165816)
Knight-Plus is an Ergonomic Mechanical keyboard suite redesigned by X-Bow that includes both the main keyboard and the numpad.
If you spend your work days in front of a computer, you have likely felt some discomfort after a long day of typing. While spending less time on our computers would be the ideal remedy for this problem, that is not a realistic solution for most people. X-Bows was designed to limit the stress on your hands and wrists while also providing a productive and stylish typing experience.
X-Bows was designed with three criteria in mind:
* Enhancing the comfort and ergonomics of the keyboard
* Limiting the learning curve for our new layout
* Creating an attractive design
* Keyboard Maintainer: X-BOWS
* Hardware Supported: X-BOWS Numpad
* Hardware Availability: [X-BOWS](https://x-bows.com/)
Make example for this keyboard (after setting up your build environment):
make xbows/numpad:default
make xbows/numpad:via
Flashing example for this keyboard:
make xbows/numpad:default:flash
make xbows/numpad:via:flash
See the [build environment setup](https://docs.qmk.fm/#/getting_started_build_tools) and the [make instructions](https://docs.qmk.fm/#/getting_started_make_guide) for more information. Brand new to QMK? Start with our [Complete Newbs Guide](https://docs.qmk.fm/#/newbs).

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# MCU name
MCU = atmega32u4
# Bootloader selection
BOOTLOADER = atmel-dfu
# Build Options
# change yes to no to disable
#
BOOTMAGIC_ENABLE = lite # Virtual DIP switch configuration
MOUSEKEY_ENABLE = yes # Mouse keys
EXTRAKEY_ENABLE = yes # Audio control and System control
CONSOLE_ENABLE = no # Console for debug
COMMAND_ENABLE = no # Commands for debug and configuration
# Do not enable SLEEP_LED_ENABLE. it uses the same timer as BACKLIGHT_ENABLE
SLEEP_LED_ENABLE = yes # Breathing sleep LED during USB suspend
NO_USB_STARTUP_CHECK = no # Disables usb supend check after keyboard startup
# if this doesn't work, see here: https://github.com/tmk/tmk_keyboard/wiki/FAQ#nkro-doesnt-work
NKRO_ENABLE = yes # USB Nkey Rollover
BACKLIGHT_ENABLE = no # Enable keyboard backlight functionality
RGBLIGHT_ENABLE = no # Enable keyboard RGB underglow
BLUETOOTH_ENABLE = no # Enable Bluetooth
AUDIO_ENABLE = no # Audio output
RGB_MATRIX_ENABLE = yes
RGB_MATRIX_DRIVER = IS31FL3731