Changes to be committed:

new file:   keyboards/lets_splitv2/Makefile
	new file:   keyboards/lets_splitv2/config.h
	new file:   keyboards/lets_splitv2/i2c.c
	new file:   keyboards/lets_splitv2/i2c.h
	new file:   keyboards/lets_splitv2/imgs/split-keyboard-i2c-schematic.png
	new file:   keyboards/lets_splitv2/imgs/split-keyboard-serial-schematic.png
	new file:   keyboards/lets_splitv2/keymaps/default/keymap.c
	new file:   keyboards/lets_splitv2/lets_split.c
	new file:   keyboards/lets_splitv2/lets_split.h
	new file:   keyboards/lets_splitv2/matrix.c
	new file:   keyboards/lets_splitv2/pro_micro.h
	new file:   keyboards/lets_splitv2/readme.md
	new file:   keyboards/lets_splitv2/serial.c
	new file:   keyboards/lets_splitv2/serial.h
	new file:   keyboards/lets_splitv2/split_util.c
	new file:   keyboards/lets_splitv2/split_util.h
	new file:   keyboards/maxipad/Makefile
	new file:   keyboards/maxipad/config.h
	new file:   keyboards/maxipad/keymaps/default/Makefile
	new file:   keyboards/maxipad/keymaps/default/config.h
	new file:   keyboards/maxipad/keymaps/default/keymap.c
	new file:   keyboards/maxipad/keymaps/default/readme.md
	new file:   keyboards/maxipad/maxipad.c
	new file:   keyboards/maxipad/maxipad.h
	new file:   keyboards/maxipad/readme.md

keyboards/lets_splitv2/split_util.c

@@ -0,0 +1,76 @@
+#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 "i2c.h"
+#include "serial.h"
+#include "keyboard.h"
+#include "config.h"
+
+volatile bool isLeftHand = true;
+
+static void setup_handedness(void) {
+  #ifdef EE_HANDS
+    isLeftHand = eeprom_read_byte(EECONFIG_HANDEDNESS);
+  #else
+    #ifdef I2C_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();
+    }
+}