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-rw-r--r--keyboards/lets_split/Makefile2
-rw-r--r--keyboards/lets_split/config.h6
-rw-r--r--keyboards/lets_split/keymaps/default/keymap.c65
-rw-r--r--keyboards/lets_split/lets_split.h8
-rw-r--r--keyboards/lets_splitv2/Makefile78
-rw-r--r--keyboards/lets_splitv2/config.h98
-rw-r--r--keyboards/lets_splitv2/i2c.c159
-rw-r--r--keyboards/lets_splitv2/i2c.h31
-rw-r--r--keyboards/lets_splitv2/imgs/split-keyboard-i2c-schematic.pngbin0 -> 26565 bytes
-rw-r--r--keyboards/lets_splitv2/imgs/split-keyboard-serial-schematic.pngbin0 -> 19487 bytes
-rw-r--r--keyboards/lets_splitv2/keymaps/default/keymap.c159
-rw-r--r--keyboards/lets_splitv2/lets_split.c30
-rw-r--r--keyboards/lets_splitv2/lets_split.h25
-rw-r--r--keyboards/lets_splitv2/matrix.c311
-rw-r--r--keyboards/lets_splitv2/pro_micro.h362
-rw-r--r--keyboards/lets_splitv2/readme.md102
-rw-r--r--keyboards/lets_splitv2/serial.c225
-rw-r--r--keyboards/lets_splitv2/serial.h26
-rw-r--r--keyboards/lets_splitv2/split_util.c76
-rw-r--r--keyboards/lets_splitv2/split_util.h22
-rw-r--r--keyboards/maxipad/Makefile75
-rw-r--r--keyboards/maxipad/config.h162
-rw-r--r--keyboards/maxipad/keymaps/default/Makefile21
-rw-r--r--keyboards/maxipad/keymaps/default/config.h8
-rw-r--r--keyboards/maxipad/keymaps/default/keymap.c54
-rw-r--r--keyboards/maxipad/keymaps/default/readme.md1
-rw-r--r--keyboards/maxipad/maxipad.c28
-rw-r--r--keyboards/maxipad/maxipad.h25
-rw-r--r--keyboards/maxipad/readme.md28
29 files changed, 2119 insertions, 68 deletions
diff --git a/keyboards/lets_split/Makefile b/keyboards/lets_split/Makefile
index b9f07636be..982cfc591b 100644
--- a/keyboards/lets_split/Makefile
+++ b/keyboards/lets_split/Makefile
@@ -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
diff --git a/keyboards/lets_split/config.h b/keyboards/lets_split/config.h
index 6f90997ab4..bf618704cd 100644
--- a/keyboards/lets_split/config.h
+++ b/keyboards/lets_split/config.h
@@ -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
diff --git a/keyboards/lets_split/keymaps/default/keymap.c b/keyboards/lets_split/keymaps/default/keymap.c
index 0d2d94b672..8c8466ebd5 100644
--- a/keyboards/lets_split/keymaps/default/keymap.c
+++ b/keyboards/lets_split/keymaps/default/keymap.c
@@ -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
diff --git a/keyboards/lets_split/lets_split.h b/keyboards/lets_split/lets_split.h
index fe7ae07679..04844ed639 100644
--- a/keyboards/lets_split/lets_split.h
+++ b/keyboards/lets_split/lets_split.h
@@ -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 }, \
diff --git a/keyboards/lets_splitv2/Makefile b/keyboards/lets_splitv2/Makefile
new file mode 100644
index 0000000000..982cfc591b
--- /dev/null
+++ b/keyboards/lets_splitv2/Makefile
@@ -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
diff --git a/keyboards/lets_splitv2/config.h b/keyboards/lets_splitv2/config.h
new file mode 100644
index 0000000000..bf618704cd
--- /dev/null
+++ b/keyboards/lets_splitv2/config.h
@@ -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
diff --git a/keyboards/lets_splitv2/i2c.c b/keyboards/lets_splitv2/i2c.c
new file mode 100644
index 0000000000..c72789403e
--- /dev/null
+++ b/keyboards/lets_splitv2/i2c.c
@@ -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);
+}
diff --git a/keyboards/lets_splitv2/i2c.h b/keyboards/lets_splitv2/i2c.h
new file mode 100644
index 0000000000..08ce4b0093
--- /dev/null
+++ b/keyboards/lets_splitv2/i2c.h
@@ -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
diff --git a/keyboards/lets_splitv2/imgs/split-keyboard-i2c-schematic.png b/keyboards/lets_splitv2/imgs/split-keyboard-i2c-schematic.png
new file mode 100644
index 0000000000..8882947187
--- /dev/null
+++ b/keyboards/lets_splitv2/imgs/split-keyboard-i2c-schematic.png
Binary files differ
diff --git a/keyboards/lets_splitv2/imgs/split-keyboard-serial-schematic.png b/keyboards/lets_splitv2/imgs/split-keyboard-serial-schematic.png
new file mode 100644
index 0000000000..7621d38ed9
--- /dev/null
+++ b/keyboards/lets_splitv2/imgs/split-keyboard-serial-schematic.png
Binary files differ
diff --git a/keyboards/lets_splitv2/keymaps/default/keymap.c b/keyboards/lets_splitv2/keymaps/default/keymap.c
new file mode 100644
index 0000000000..8c8466ebd5
--- /dev/null
+++ b/keyboards/lets_splitv2/keymaps/default/keymap.c
@@ -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
diff --git a/keyboards/lets_splitv2/lets_split.c b/keyboards/lets_splitv2/lets_split.c
new file mode 100644
index 0000000000..574c116a75
--- /dev/null
+++ b/keyboards/lets_splitv2/lets_split.c
@@ -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) {
+