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authorxyxjj <junjie0605@hotmail.com>2017-05-31 14:34:28 +0800
committerJack Humbert <jack.humb@gmail.com>2017-07-28 10:45:34 -0400
commitbe2c7aac31c956caacaba44531463c8083f5199e (patch)
tree99c6ff3cf9a57d19f90c3db7a0cf4ef7a9a7ce56
parentc5780647d8f95fc8c51e2864498fa602c49c90e5 (diff)
downloadqmk_firmware-be2c7aac31c956caacaba44531463c8083f5199e.tar.gz
qmk_firmware-be2c7aac31c956caacaba44531463c8083f5199e.zip
Add files via upload
-rw-r--r--keyboards/DeltaSplit75/DeltaSplit75.c1
-rw-r--r--keyboards/DeltaSplit75/DeltaSplit75.h13
-rw-r--r--keyboards/DeltaSplit75/Makefile5
-rw-r--r--keyboards/DeltaSplit75/ProtoSplit/Makefile3
-rw-r--r--keyboards/DeltaSplit75/ProtoSplit/ProtoSplit.c32
-rw-r--r--keyboards/DeltaSplit75/ProtoSplit/ProtoSplit.h37
-rw-r--r--keyboards/DeltaSplit75/ProtoSplit/config.h90
-rw-r--r--keyboards/DeltaSplit75/ProtoSplit/rules.mk5
-rw-r--r--keyboards/DeltaSplit75/V2/Makefile3
-rw-r--r--keyboards/DeltaSplit75/V2/V2.c32
-rw-r--r--keyboards/DeltaSplit75/V2/V2.h37
-rw-r--r--keyboards/DeltaSplit75/V2/config.h90
-rw-r--r--keyboards/DeltaSplit75/V2/rules.mk5
-rw-r--r--keyboards/DeltaSplit75/config.h29
-rw-r--r--keyboards/DeltaSplit75/eeprom-lefthand.eep2
-rw-r--r--keyboards/DeltaSplit75/eeprom-righthand.eep2
-rw-r--r--keyboards/DeltaSplit75/i2c.c162
-rw-r--r--keyboards/DeltaSplit75/i2c.h31
-rw-r--r--keyboards/DeltaSplit75/keymaps/Default/config.h31
-rw-r--r--keyboards/DeltaSplit75/keymaps/Default/keymap.c30
-rw-r--r--keyboards/DeltaSplit75/matrix.c318
-rw-r--r--keyboards/DeltaSplit75/pro_micro.h362
-rw-r--r--keyboards/DeltaSplit75/readme.md119
-rw-r--r--keyboards/DeltaSplit75/rules.mk87
-rw-r--r--keyboards/DeltaSplit75/serial.c228
-rw-r--r--keyboards/DeltaSplit75/serial.h26
-rw-r--r--keyboards/DeltaSplit75/split_util.c81
-rw-r--r--keyboards/DeltaSplit75/split_util.h22
28 files changed, 1883 insertions, 0 deletions
diff --git a/keyboards/DeltaSplit75/DeltaSplit75.c b/keyboards/DeltaSplit75/DeltaSplit75.c
new file mode 100644
index 0000000000..b3d162ba9d
--- /dev/null
+++ b/keyboards/DeltaSplit75/DeltaSplit75.c
@@ -0,0 +1 @@
+#include "DeltaSplit75.h" \ No newline at end of file
diff --git a/keyboards/DeltaSplit75/DeltaSplit75.h b/keyboards/DeltaSplit75/DeltaSplit75.h
new file mode 100644
index 0000000000..8931f73a5e
--- /dev/null
+++ b/keyboards/DeltaSplit75/DeltaSplit75.h
@@ -0,0 +1,13 @@
+#ifndef DeltaSplit75_H
+#define DeltaSplit75_H
+
+#ifdef SUBPROJECT_V2
+ #include "V2.h"
+#endif
+#ifdef SUBPROJECT_ProtoSplit
+ #include "ProtoSplit.h"
+#endif
+
+#include "quantum.h"
+
+#endif \ No newline at end of file
diff --git a/keyboards/DeltaSplit75/Makefile b/keyboards/DeltaSplit75/Makefile
new file mode 100644
index 0000000000..9b7c3a6024
--- /dev/null
+++ b/keyboards/DeltaSplit75/Makefile
@@ -0,0 +1,5 @@
+SUBPROJECT_DEFAULT = RightB
+
+ifndef MAKEFILE_INCLUDED
+ include ../../Makefile
+endif
diff --git a/keyboards/DeltaSplit75/ProtoSplit/Makefile b/keyboards/DeltaSplit75/ProtoSplit/Makefile
new file mode 100644
index 0000000000..4e2a6f00fd
--- /dev/null
+++ b/keyboards/DeltaSplit75/ProtoSplit/Makefile
@@ -0,0 +1,3 @@
+ifndef MAKEFILE_INCLUDED
+ include ../../Makefile
+endif \ No newline at end of file
diff --git a/keyboards/DeltaSplit75/ProtoSplit/ProtoSplit.c b/keyboards/DeltaSplit75/ProtoSplit/ProtoSplit.c
new file mode 100644
index 0000000000..1199257d04
--- /dev/null
+++ b/keyboards/DeltaSplit75/ProtoSplit/ProtoSplit.c
@@ -0,0 +1,32 @@
+#include "DeltaSplit75.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) {
+ #ifdef AUDIO_ENABLE
+ PLAY_NOTE_ARRAY(tone_goodbye, false, 0);
+ _delay_ms(150);
+ stop_all_notes();
+ #endif
+}
diff --git a/keyboards/DeltaSplit75/ProtoSplit/ProtoSplit.h b/keyboards/DeltaSplit75/ProtoSplit/ProtoSplit.h
new file mode 100644
index 0000000000..20aa5cbe85
--- /dev/null
+++ b/keyboards/DeltaSplit75/ProtoSplit/ProtoSplit.h
@@ -0,0 +1,37 @@
+#ifndef ProtoSplit_H
+#define ProtoSplit_H
+
+#include "../DeltaSplit75.h"
+
+//void promicro_bootloader_jmp(bool program);
+#include "quantum.h"
+
+//void promicro_bootloader_jmp(bool program);
+//matrix is defined in a weird way here; the layout on both sides are asymmetrical, but the "matrix" is symmetrical but with empty gaps
+//the last column is defined as a separate row because the firmware currently doesnt support more than 8 columns (this layout has 9 columns per side) K45 and K110 are the Bs on both sides
+#define KEYMAP( \
+ K00, K01, K02, K03, K04, K05, K06, K70, K71, K72, K73, K74, K75, K76, K77, K132, \
+ K10, K11, K12, K13, K14, K15, K16, K80, K81, K82, K83, K84, K85, K86, K87, K133, \
+ K20, K21, K22, K23, K24, K25, K90, K91, K92, K93, K94, K95, K96, K97, K134, \
+ K30, K31, K32, K33, K34, K35, K100, K101, K102, K103, K104, K105, K107, K135, \
+ K40, K41, K42, K43, K44, K45, K110, K111, K112, K113, K114, K115, K116, K117, K136, \
+ K50, K51, K52, K54, K55, K120, K121, K122, K123, K126, K127, K137 \
+ ) \
+ { \
+ { K00, K01, K02, K03, K04, K05, K06, KC_NO}, \
+ { K10, K11, K12, K13, K14, K15, K16, KC_NO}, \
+ { K20, K21, K22, K23, K24, K25, KC_NO, KC_NO}, \
+ { K30, K31, K32, K33, K34, K35, KC_NO, KC_NO}, \
+ { K40, K41, K42, K43, K44, K45, KC_NO, KC_NO}, \
+ { K50, K51, K52, KC_NO, K54, K55, KC_NO, KC_NO}, \
+ { KC_NO, KC_NO, KC_NO, KC_NO, KC_NO, KC_NO, KC_NO, KC_NO}, \
+ { K70 , K71, K72, K73, K74, K75, K76, K77}, \
+ { K80, K81, K82, K83, K84, K85, K86, K87}, \
+ { K90, K91, K92, K93, K94, K95, K96, K97}, \
+ { K100, K101, K102, K103, K104, K105, KC_NO, K107}, \
+ { K110, K111, K112, K113, K114, K115, K116, K117}, \
+ { K120, K121, K122, K123, KC_NO, KC_NO, K126, K127}, \
+ { KC_NO, KC_NO, K132, K133, K134, K135, K136, K137} \
+ }
+
+#endif \ No newline at end of file
diff --git a/keyboards/DeltaSplit75/ProtoSplit/config.h b/keyboards/DeltaSplit75/ProtoSplit/config.h
new file mode 100644
index 0000000000..0f4b806e2d
--- /dev/null
+++ b/keyboards/DeltaSplit75/ProtoSplit/config.h
@@ -0,0 +1,90 @@
+/*
+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 xyxjj
+#define PRODUCT DeltaSplit75
+#define DESCRIPTION 75% split keyboard
+
+/* key matrix size */
+// Rows are doubled-up
+#define MATRIX_ROWS 14
+#define MATRIX_COLS 8
+
+// wiring of each half
+#define MATRIX_ROW_PINS { F4, F5, F6, F7, B1, B3, B2 }
+#define MATRIX_COL_PINS { B6, B5, B4, E6, D7, C6, D4, D1}
+
+#define CATERINA_BOOTLOADER
+
+/* 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 RGB_DI_PIN D3
+#define RGBLIGHT_TIMER
+#define RGBLED_NUM 12 // Number of LEDs
+#define ws2812_PORTREG PORTD
+#define ws2812_DDRREG DDRD
+
+/*
+ * 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/DeltaSplit75/ProtoSplit/rules.mk b/keyboards/DeltaSplit75/ProtoSplit/rules.mk
new file mode 100644
index 0000000000..80a942d06f
--- /dev/null
+++ b/keyboards/DeltaSplit75/ProtoSplit/rules.mk
@@ -0,0 +1,5 @@
+BACKLIGHT_ENABLE = no
+
+ifndef QUANTUM_DIR
+ include ../../../Makefile
+endif
diff --git a/keyboards/DeltaSplit75/V2/Makefile b/keyboards/DeltaSplit75/V2/Makefile
new file mode 100644
index 0000000000..4e2a6f00fd
--- /dev/null
+++ b/keyboards/DeltaSplit75/V2/Makefile
@@ -0,0 +1,3 @@
+ifndef MAKEFILE_INCLUDED
+ include ../../Makefile
+endif \ No newline at end of file
diff --git a/keyboards/DeltaSplit75/V2/V2.c b/keyboards/DeltaSplit75/V2/V2.c
new file mode 100644
index 0000000000..1199257d04
--- /dev/null
+++ b/keyboards/DeltaSplit75/V2/V2.c
@@ -0,0 +1,32 @@
+#include "DeltaSplit75.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) {
+ #ifdef AUDIO_ENABLE
+ PLAY_NOTE_ARRAY(tone_goodbye, false, 0);
+ _delay_ms(150);
+ stop_all_notes();
+ #endif
+}
diff --git a/keyboards/DeltaSplit75/V2/V2.h b/keyboards/DeltaSplit75/V2/V2.h
new file mode 100644
index 0000000000..84503e6b4c
--- /dev/null
+++ b/keyboards/DeltaSplit75/V2/V2.h
@@ -0,0 +1,37 @@
+#ifndef V2_H
+#define V2_H
+
+#include "../DeltaSplit75.h"
+
+//void promicro_bootloader_jmp(bool program);
+#include "quantum.h"
+
+//void promicro_bootloader_jmp(bool program);
+//matrix is defined in a weird way here; the layout on both sides are asymmetrical, but the "matrix" is symmetrical but with empty gaps
+//the last column is defined as a separate row because the firmware currently doesnt support more than 8 columns (this layout has 9 columns per side) K45 and K110 are the Bs on both sides; K53 and K106 are extra keys for ISO
+#define KEYMAP( \
+ K00, K01, K02, K03, K04, K05, K06, K70, K71, K72, K73, K74, K75, K76, K77, K132, \
+ K10, K11, K12, K13, K14, K15, K16, K80, K81, K82, K83, K84, K85, K86, K87, K133, \
+ K20, K21, K22, K23, K24, K25, K90, K91, K92, K93, K94, K95, K96, K97, K134, \
+ K30, K31, K32, K33, K34, K35, K100, K101, K102, K103, K104, K105, K106, K107, K135, \
+ K40, K53, K41, K42, K43, K44, K45, K110, K111, K112, K113, K114, K115, K116, K117, K136, \
+ K50, K51, K52, K54, K55, K120, K121, K122, K123, K126, K127, K137 \
+ ) \
+ { \
+ { K00, K01, K02, K03, K04, K05, K06, KC_NO}, \
+ { K10, K11, K12, K13, K14, K15, K16, KC_NO}, \
+ { K20, K21, K22, K23, K24, K25, KC_NO, KC_NO}, \
+ { K30, K31, K32, K33, K34, K35, KC_NO, KC_NO}, \
+ { K40, K41, K42, K43, K44, K45, KC_NO, KC_NO}, \
+ { K50, K51, K52, K53, K54, K55, KC_NO, KC_NO}, \
+ { KC_NO, KC_NO, KC_NO, KC_NO, KC_NO, KC_NO, KC_NO, KC_NO}, \
+ { K70 , K71, K72, K73, K74, K75, K76, K77}, \
+ { K80, K81, K82, K83, K84, K85, K86, K87}, \
+ { K90, K91, K92, K93, K94, K95, K96, K97}, \
+ { K100, K101, K102, K103, K104, K105, K106, K107}, \
+ { K110, K111, K112, K113, K114, K115, K116, K117}, \
+ { K120, K121, K122, K123, KC_NO, KC_NO, K126, K127}, \
+ { KC_NO, KC_NO, K132, K133, K134, K135, K136, K137} \
+ }
+
+#endif \ No newline at end of file
diff --git a/keyboards/DeltaSplit75/V2/config.h b/keyboards/DeltaSplit75/V2/config.h
new file mode 100644
index 0000000000..0f4b806e2d
--- /dev/null
+++ b/keyboards/DeltaSplit75/V2/config.h
@@ -0,0 +1,90 @@
+/*
+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 xyxjj
+#define PRODUCT DeltaSplit75
+#define DESCRIPTION 75% split keyboard
+
+/* key matrix size */
+// Rows are doubled-up
+#define MATRIX_ROWS 14
+#define MATRIX_COLS 8
+
+// wiring of each half
+#define MATRIX_ROW_PINS { F4, F5, F6, F7, B1, B3, B2 }
+#define MATRIX_COL_PINS { B6, B5, B4, E6, D7, C6, D4, D1}
+
+#define CATERINA_BOOTLOADER
+
+/* 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 RGB_DI_PIN D3
+#define RGBLIGHT_TIMER
+#define RGBLED_NUM 12 // Number of LEDs
+#define ws2812_PORTREG PORTD
+#define ws2812_DDRREG DDRD
+
+/*
+ * 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/DeltaSplit75/V2/rules.mk b/keyboards/DeltaSplit75/V2/rules.mk
new file mode 100644
index 0000000000..80a942d06f
--- /dev/null
+++ b/keyboards/DeltaSplit75/V2/rules.mk
@@ -0,0 +1,5 @@
+BACKLIGHT_ENABLE = no
+
+ifndef QUANTUM_DIR
+ include ../../../Makefile
+endif
diff --git a/keyboards/DeltaSplit75/config.h b/keyboards/DeltaSplit75/config.h
new file mode 100644
index 0000000000..ea0498c504
--- /dev/null
+++ b/keyboards/DeltaSplit75/config.h
@@ -0,0 +1,29 @@
+/*
+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"
+
+#ifdef SUBPROJECT_RightB
+ #include "RightB/config.h"
+#endif
+#ifdef SUBPROJECT_V2
+ #include "V2/config.h"
+#endif
+#endif
diff --git a/keyboards/DeltaSplit75/eeprom-lefthand.eep b/keyboards/DeltaSplit75/eeprom-lefthand.eep
new file mode 100644
index 0000000000..b9666a74c0
--- /dev/null
+++ b/keyboards/DeltaSplit75/eeprom-lefthand.eep
@@ -0,0 +1,2 @@
+:0B0000000000000000000000000001F4
+:00000001FF
diff --git a/keyboards/DeltaSplit75/eeprom-righthand.eep b/keyboards/DeltaSplit75/eeprom-righthand.eep
new file mode 100644
index 0000000000..94cc5be7fc
--- /dev/null
+++ b/keyboards/DeltaSplit75/eeprom-righthand.eep
@@ -0,0 +1,2 @@
+:0B0000000000000000000000000000F5
+:00000001FF
diff --git a/keyboards/DeltaSplit75/i2c.c b/keyboards/DeltaSplit75/i2c.c
new file mode 100644
index 0000000000..084c890c40
--- /dev/null
+++ b/keyboards/DeltaSplit75/i2c.c
@@ -0,0 +1,162 @@
+#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"
+
+#ifdef USE_I2C
+
+// 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);
+}
+#endif
diff --git a/keyboards/DeltaSplit75/i2c.h b/keyboards/DeltaSplit75/i2c.h
new file mode 100644
index 0000000000..08ce4b0093
--- /dev/null
+++ b/keyboards/DeltaSplit75/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/DeltaSplit75/keymaps/Default/config.h b/keyboards/DeltaSplit75/keymaps/Default/config.h
new file mode 100644
index 0000000000..12a1402d98
--- /dev/null
+++ b/keyboards/DeltaSplit75/keymaps/Default/config.h
@@ -0,0 +1,31 @@
+/*
+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/>.
+*/
+
+
+#define USE_SERIAL
+
+#define MASTER_LEFT
+// #define _MASTER_RIGHT
+// #define EE_HANDS
+
+
+#ifdef SUBPROJECT_V2
+ #include "../../V2/config.h"
+#endif
+#ifdef SUBPROJECT_ProtoSplit
+ #include "../../ProtoSplit/config.h"
+#endif
diff --git a/keyboards/DeltaSplit75/keymaps/Default/keymap.c b/keyboards/DeltaSplit75/keymaps/Default/keymap.c
new file mode 100644
index 0000000000..563bcca586
--- /dev/null
+++ b/keyboards/DeltaSplit75/keymaps/Default/keymap.c
@@ -0,0 +1,30 @@
+#include "DeltaSplit75.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.
+
+// Fillers to make layering more clear
+
+const uint16_t PROGMEM keymaps[][MATRIX_ROWS][MATRIX_COLS] = {
+ KEYMAP(
+ KC_ESC, KC_F1, KC_F2, KC_F3, KC_F4, KC_F5, KC_F6, KC_F7, KC_F8, KC_F9, KC_F10, KC_F11, KC_F12, KC_INS, KC_HOME, KC_PGUP,
+ KC_GRV, KC_1, KC_2, KC_3, KC_4, KC_5, KC_6, KC_7, KC_8, KC_9, KC_0, KC_MINS, KC_EQL, KC_DEL, KC_END, KC_PGDN,
+ KC_TAB, KC_Q, KC_W, KC_E, KC_R, KC_T, KC_Y, KC_U, KC_I, KC_O, KC_P, KC_LBRC, KC_RBRC, KC_BSPC, KC_SLCK,
+ KC_LCTL, KC_A, KC_S, KC_D, KC_F, KC_G, KC_H, KC_J, KC_K, KC_L, KC_SCLN, KC_QUOT, KC_TRNS, KC_ENT, KC_PAUS, //modify KC_TRNS to enable ISO Support
+ KC_LSFT, KC_TRNS, KC_Z, KC_X, KC_C, KC_V, KC_B, KC_B, KC_N, KC_M, KC_COMM, KC_DOT, KC_SLSH, KC_LSFT, KC_UP, KC_PSCR, //modify KC_TRNS to enable ISO Support
+ KC_LCTL, KC_LGUI, KC_LALT, KC_SPC, MO(1), KC_SPC, KC_RALT, KC_RGUI, KC_RCTL, KC_LEFT, KC_DOWN, KC_RGHT),
+
+ KEYMAP(
+ 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, RESET,
+ KC_BSLS, 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_VOLU, KC_UP, KC_TRNS, KC_TRNS, KC_TRNS, KC_TRNS, KC_TRNS, KC_TRNS, KC_TRNS, KC_TRNS, KC_TRNS, KC_TRNS, KC_TRNS, KC_TRNS,
+ M(1), KC_LEFT, KC_DOWN, KC_RGHT, KC_PAUS, 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_VOLD, M(0), KC_PSCR, 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),
+}; \ No newline at end of file
diff --git a/keyboards/DeltaSplit75/matrix.c b/keyboards/DeltaSplit75/matrix.c
new file mode 100644
index 0000000000..1389690042
--- /dev/null
+++ b/keyboards/DeltaSplit75/matrix.c
@@ -0,0 +1,318 @@
+/*
+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 "split_util.h"
+#include "pro_micro.h"
+#include "config.h"
+
+#ifdef USE_I2C
+# include "i2c.h"
+#else // USE_SERIAL
+# include "serial.h"
+#endif
+
+#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;
+}
+
+#ifdef USE_I2C
+
+// 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;
+}
+
+#else // USE_SERIAL
+
+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 // USE_SERIAL
+ 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 // USE_SERIAL
+ 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);
+}
diff --git a/keyboards/DeltaSplit75/pro_micro.h b/keyboards/DeltaSplit75/pro_micro.h
new file mode 100644
index 0000000000..f9e7ed75d9
--- /dev/null
+++ b/keyboards/DeltaSplit75/pro_micro.h
@@ -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 ADC0 = 18;
+static const uint8_t ADC1 = 19;
+static const uint8_t ADC2 = 20;
+static const uint8_t ADC3 = 21;
+static const uint8_t ADC4 = 22;
+static const uint8_t ADC5 = 23;
+static const uint8_t ADC6 = 24; // D4
+static const uint8_t ADC7 = 25; // D6
+static const uint8_t ADC8 = 26; // D8
+static const uint8_t ADC9 = 27; // D9
+static const uint8_t ADC10 = 28; // D10
+static const uint8_t ADC11 = 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 */
diff --git a/keyboards/DeltaSplit75/readme.md b/keyboards/DeltaSplit75/readme.md
new file mode 100644
index 0000000000..b8c5fa1fdb
--- /dev/null
+++ b/keyboards/DeltaSplit75/readme.md
@@ -0,0 +1,119 @@
+DeltaSplit75
+======
+
+This readme and most of the code are from https://github.com/ahtn/tmk_keyboard/ and https://github.com/qmk/qmk_firmware/tree/master/keyboards/lets_split
+Credit to ahtn and wootpatoot for work on the split keyboard firmware
+
+Split keyboard firmware for Arduino Pro Micro or other ATmega32u4
+based boards.
+
+
+## First Time Setup
+
+Download or clone the whole firmware and navigate to the keyboards/DeltaSplit75 directory. Once your dev env is setup, you'll be able to generate the default .hex using:
+
+```
+$ make V2
+or
+$ make ProtoSplit (if you have one of the prototype PCBs)
+```
+
+You will see a lot of output and if everything worked correctly you will see the built hex files:
+
+```
+DeltaSplit75_ProtoSplit_Default
+or
+DeltaSplit75_V2_Default.hex
+```
+
+
+```
+
+For more information on customizing keymaps, take a look at the primary documentation for [Customizing Your Keymap](/readme.md##customizing-your-keymap) in the main readme.md.
+
+### DeltaSplit75 V2
+The PCBs available in groupbuy are all v2, if you've bought one of my prototype PCBs (it says DeltaSplit65 on the silkscreen instead of 75), use the code $make ProtoSplit instead
+
+Features
+--------
+
+For the full Quantum Mechanical Keyboard feature list, see [the parent readme.md](/readme.md).
+
+Some features supported by the firmware:
+
+* Either half can connect to the computer via USB, or both halves can be used
+ independently.
+* 75% formfactor
+* Support for multiple Bottom Rows
+* RGB underglow support
+* Split Backspace and ISO support
+
+
+ Flashing
+-------
+I personally use xLoader to upload my hex files to the keyboard, though any other working software is fine too
+
+
+Choosing which board to plug the USB cable into (choosing Master)
+--------
+Because the two boards are identical, the firmware has logic to differentiate the left and right board.
+
+It uses two strategies to figure things out: look at the EEPROM (memory on the chip) or looks if the current board has the usb cable.
+
+The EEPROM approach requires additional setup (flashing the eeeprom) but allows you to swap the usb cable to either side.
+
+The USB cable approach is easier to setup and if you just want the usb cable on the left board, you do not need to do anything extra.
+
+### Setting the left hand as master
+If you always plug the usb cable into the left board, nothing extra is needed as this is the default. Comment out `EE_HANDS` and comment out `I2C_MASTER_RIGHT` or `MASTER_RIGHT` if for some reason it was set.
+
+### Setting the right hand as master
+If you always plug the usb cable into the right board, add an extra flag to your `config.h`
+```
+ #define MASTER_RIGHT
+```
+
+### Setting EE_hands to use either hands as master
+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:
+```
+avrdude -p atmega32u4 -P $(COM_PORT) -c avr109 -U eeprom:w:eeprom-lefthand.eep
+// or the equivalent in dfu-programmer
+
+```
+and similarly for right half
+```
+avrdude -p atmega32u4 -P $(COM_PORT) -c avr109 -U eeprom:w:eeprom-righhand.eep
+// or the equivalent in dfu-programmer
+```
+
+NOTE: replace `$(COM_PORT)` with the port of your device (e.g. `/dev/ttyACM0`)
+
+After you have flashed the EEPROM, you then need to set `EE_HANDS` in your config.h, rebuild the hex files and reflash.
+
+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 using bootmagic's default layout option.
+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.
+
+
+Notes on Using Pro Micro 3.3V
+-----------------------------
+
+Do update the `F_CPU` parameter in `rules.mk` to `8000000` which reflects
+the frequency on the 3.3V board.
+
+Also, if the slave board is producing weird characters in certain columns,
+update the following line in `matrix.c` to the following:
+
+```
+// _delay_us(30); // without this wait read unstable value.
+_delay_us(300); // without this wait read unstable value.
+```
diff --git a/keyboards/DeltaSplit75/rules.mk b/keyboards/DeltaSplit75/rules.mk
new file mode 100644
index 0000000000..0efa785505
--- /dev/null
+++ b/keyboards/DeltaSplit75/rules.mk
@@ -0,0 +1,87 @@
+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 ?= 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.
+SUBPROJECT_rev1 ?= yes
+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
+
+avrdude: build
+ ls /dev/tty* > /tmp/1; \
+ echo "Reset your Pro Micro now"; \
+ while [[ -z $$USB ]]; do \
+ sleep 1; \
+ ls /dev/tty* > /tmp/2; \
+ USB=`diff /tmp/1 /tmp/2 | grep -o '/dev/tty.*'`; \
+ done; \
+ avrdude -p $(MCU) -c avr109 -P $$USB -U flash:w:$(BUILD_DIR)/$(TARGET).hex
+
+.PHONY: avrdude
diff --git a/keyboards/DeltaSplit75/serial.c b/keyboards/DeltaSplit75/serial.c
new file mode 100644
index 0000000000..6faed09ce0
--- /dev/null
+++ b/keyboards/DeltaSplit75/serial.c
@@ -0,0 +1,228 @@
+/*
+ * 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"
+
+#ifdef USE_SERIAL
+
+// 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;
+}
+
+#endif
diff --git a/keyboards/DeltaSplit75/serial.h b/keyboards/DeltaSplit75/serial.h
new file mode 100644
index 0000000000..6ef52019a8
--- /dev/null
+++ b/keyboards/DeltaSplit75/serial.h
@@ -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_COLS+7)/8 *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
diff --git a/keyboards/DeltaSplit75/split_util.c b/keyboards/DeltaSplit75/split_util.c
new file mode 100644
index 0000000000..226dc18816
--- /dev/null
+++ b/keyboards/DeltaSplit75/split_util.c
@@ -0,0 +1,81 @@
+#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 "keyboard.h"
+#include "config.h"
+
+#ifdef USE_I2C
+# include "i2c.h"
+#else
+# include "serial.h"
+#endif
+
+volatile bool isLeftHand = true;
+
+static void setup_handedness(void) {
+ #ifdef EE_HANDS
+ isLeftHand = eeprom_read_byte(EECONFIG_HANDEDNESS);
+ #else
+ // I2C_MASTER_RIGHT is deprecated use MASTER_RIGHT instead since this works for both serial and i2c
+ #if defined(I2C_MASTER_RIGHT) || defined(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();
+ }
+}
diff --git a/keyboards/DeltaSplit75/split_util.h b/keyboards/DeltaSplit75/split_util.h
new file mode 100644
index 0000000000..6b896679ca
--- /dev/null
+++ b/keyboards/DeltaSplit75/split_util.h
@@ -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