diff --git a/common.mk b/common.mk
index 9b5ef0ea8..04f036477 100644
--- a/common.mk
+++ b/common.mk
@@ -7,18 +7,18 @@ SRC +=	$(COMMON_DIR)/host.c \
 	$(COMMON_DIR)/action_layer.c \
 	$(COMMON_DIR)/action_util.c \
 	$(COMMON_DIR)/keymap.c \
-	$(COMMON_DIR)/avr/timer.c \
 	$(COMMON_DIR)/print.c \
-	$(COMMON_DIR)/bootloader.c \
-	$(COMMON_DIR)/suspend.c \
+	$(COMMON_DIR)/util.c \
+	$(COMMON_DIR)/avr/suspend.c \
 	$(COMMON_DIR)/avr/xprintf.S \
-	$(COMMON_DIR)/util.c
+	$(COMMON_DIR)/avr/timer.c \
+	$(COMMON_DIR)/avr/bootloader.c
 
 
 # Option modules
 ifdef BOOTMAGIC_ENABLE
     SRC += $(COMMON_DIR)/bootmagic.c
-    SRC += $(COMMON_DIR)/eeconfig.c
+    SRC += $(COMMON_DIR)/avr/eeconfig.c
     OPT_DEFS += -DBOOTMAGIC_ENABLE
 endif
 
diff --git a/common/bootloader.c b/common/avr/bootloader.c
similarity index 100%
rename from common/bootloader.c
rename to common/avr/bootloader.c
diff --git a/common/eeconfig.c b/common/avr/eeconfig.c
similarity index 100%
rename from common/eeconfig.c
rename to common/avr/eeconfig.c
diff --git a/common/suspend.c b/common/avr/suspend.c
similarity index 71%
rename from common/suspend.c
rename to common/avr/suspend.c
index 5b378892f..f44a036be 100644
--- a/common/suspend.c
+++ b/common/avr/suspend.c
@@ -1,7 +1,29 @@
-#include "suspend.h"
+#include <stdbool.h>
+#include <avr/sleep.h>
+#include <avr/wdt.h>
+#include <avr/interrupt.h>
 #include "matrix.h"
 #include "action.h"
 #include "backlight.h"
+#include "suspend_avr.h"
+#include "suspend.h"
+
+
+#define wdt_intr_enable(value)   \
+__asm__ __volatile__ (  \
+    "in __tmp_reg__,__SREG__" "\n\t"    \
+    "cli" "\n\t"    \
+    "wdr" "\n\t"    \
+    "sts %0,%1" "\n\t"  \
+    "out __SREG__,__tmp_reg__" "\n\t"   \
+    "sts %0,%2" "\n\t" \
+    : /* no outputs */  \
+    : "M" (_SFR_MEM_ADDR(_WD_CONTROL_REG)), \
+    "r" (_BV(_WD_CHANGE_BIT) | _BV(WDE)), \
+    "r" ((uint8_t) ((value & 0x08 ? _WD_PS3_MASK : 0x00) | \
+        _BV(WDIE) | (value & 0x07)) ) \
+    : "r0"  \
+)
 
 
 void suspend_power_down(void)
diff --git a/common/avr/suspend_avr.h b/common/avr/suspend_avr.h
new file mode 100644
index 000000000..357102da4
--- /dev/null
+++ b/common/avr/suspend_avr.h
@@ -0,0 +1,27 @@
+#ifndef SUSPEND_AVR_H
+#define SUSPEND_AVR_H
+
+#include <stdint.h>
+#include <stdbool.h>
+#include <avr/sleep.h>
+#include <avr/wdt.h>
+#include <avr/interrupt.h>
+
+
+#define wdt_intr_enable(value)   \
+__asm__ __volatile__ (  \
+    "in __tmp_reg__,__SREG__" "\n\t"    \
+    "cli" "\n\t"    \
+    "wdr" "\n\t"    \
+    "sts %0,%1" "\n\t"  \
+    "out __SREG__,__tmp_reg__" "\n\t"   \
+    "sts %0,%2" "\n\t" \
+    : /* no outputs */  \
+    : "M" (_SFR_MEM_ADDR(_WD_CONTROL_REG)), \
+    "r" (_BV(_WD_CHANGE_BIT) | _BV(WDE)), \
+    "r" ((uint8_t) ((value & 0x08 ? _WD_PS3_MASK : 0x00) | \
+        _BV(WDIE) | (value & 0x07)) ) \
+    : "r0"  \
+)
+
+#endif
diff --git a/common/host.h b/common/host.h
index a56e6c3b0..918af69e8 100644
--- a/common/host.h
+++ b/common/host.h
@@ -32,8 +32,8 @@ extern "C" {
 extern bool keyboard_nkro;
 #endif
 
-uint8_t keyboard_idle;
-uint8_t keyboard_protocol;
+extern uint8_t keyboard_idle;
+extern uint8_t keyboard_protocol;
 
 
 /* host driver */
diff --git a/common/keyboard.c b/common/keyboard.c
index b71d5bf13..9a809ff4a 100644
--- a/common/keyboard.c
+++ b/common/keyboard.c
@@ -15,7 +15,6 @@ 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 <stdint.h>
-#include <util/delay.h>
 #include "keyboard.h"
 #include "matrix.h"
 #include "keymap.h"
diff --git a/common/keymap.c b/common/keymap.c
index 0df2e2edf..4c0b61b8c 100644
--- a/common/keymap.c
+++ b/common/keymap.c
@@ -14,7 +14,6 @@ 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 <avr/pgmspace.h>
 #include "keymap.h"
 #include "report.h"
 #include "keycode.h"
diff --git a/common/mbed/bootloader.c b/common/mbed/bootloader.c
new file mode 100644
index 000000000..b51e83943
--- /dev/null
+++ b/common/mbed/bootloader.c
@@ -0,0 +1,4 @@
+#include "bootloader.h"
+
+
+void bootloader_jump(void) {}
diff --git a/common/mbed/suspend.c b/common/mbed/suspend.c
new file mode 100644
index 000000000..32651574f
--- /dev/null
+++ b/common/mbed/suspend.c
@@ -0,0 +1,6 @@
+#include <stdbool.h>
+
+
+void suspend_power_down(void) {}
+bool suspend_wakeup_condition(void) { return true; }
+void suspend_wakeup_init(void) {}
diff --git a/common/mbed/xprintf.cpp b/common/mbed/xprintf.cpp
new file mode 100644
index 000000000..4342b79f8
--- /dev/null
+++ b/common/mbed/xprintf.cpp
@@ -0,0 +1,46 @@
+#include <cstdarg>
+//#include <stdarg.h>
+#include "mbed.h"
+#include "mbed/xprintf.h"
+
+
+#define STRING_STACK_LIMIT    120
+
+/* mbed Serial */
+Serial ser(UART_TX, UART_RX);
+
+/* TODO: Need small implementation for embedded */
+int xprintf(const char* format, ...)
+{
+    /* copy from mbed/common/RawSerial.cpp */
+    std::va_list arg;
+    va_start(arg, format);
+    int len = vsnprintf(NULL, 0, format, arg);
+    if (len < STRING_STACK_LIMIT) {
+        char temp[STRING_STACK_LIMIT];
+        vsprintf(temp, format, arg);
+        ser.puts(temp);
+    } else {
+        char *temp = new char[len + 1];
+        vsprintf(temp, format, arg);
+        ser.puts(temp);
+        delete[] temp;
+    }
+    va_end(arg);
+    return len;
+
+/* Fail: __builtin_va_arg_pack?
+ * https://gcc.gnu.org/onlinedocs/gcc-4.3.5/gcc/Constructing-Calls.html#Constructing-Calls
+    void *arg = __builtin_apply_args();
+    void *ret = __builtin_apply((void*)(&(ser.printf)), arg, 100);
+    __builtin_return(ret)
+*/
+/* Fail: varargs can not be passed to printf
+    //int r = ser.printf("test %i\r\n", 123);
+    va_list arg;
+    va_start(arg, format);
+    int r = ser.printf(format, arg);
+    va_end(arg);
+    return r;
+*/
+}
diff --git a/common/mbed/xprintf.h b/common/mbed/xprintf.h
new file mode 100644
index 000000000..26bc529e5
--- /dev/null
+++ b/common/mbed/xprintf.h
@@ -0,0 +1,17 @@
+#ifndef XPRINTF_H
+#define XPRINTF_H
+
+//#define xprintf(format, ...)            __xprintf(format, ##__VA_ARGS__)
+
+#ifdef __cplusplus
+extern "C" {
+#endif
+
+int xprintf(const char *format, ...);
+
+#ifdef __cplusplus
+}
+#endif
+
+
+#endif
diff --git a/common/mousekey.c b/common/mousekey.c
index 017be9411..23469476e 100644
--- a/common/mousekey.c
+++ b/common/mousekey.c
@@ -16,7 +16,6 @@ along with this program.  If not, see <http://www.gnu.org/licenses/>.
 */
 
 #include <stdint.h>
-#include <util/delay.h>
 #include "keycode.h"
 #include "host.h"
 #include "timer.h"
diff --git a/common/mousekey.h b/common/mousekey.h
index d8d7beaaa..6eede06b4 100644
--- a/common/mousekey.h
+++ b/common/mousekey.h
@@ -52,12 +52,16 @@ along with this program.  If not, see <http://www.gnu.org/licenses/>.
 #endif
 
 
-uint8_t mk_delay;
-uint8_t mk_interval;
-uint8_t mk_max_speed;
-uint8_t mk_time_to_max;
-uint8_t mk_wheel_max_speed;
-uint8_t mk_wheel_time_to_max;
+#ifdef __cplusplus
+extern "C" {
+#endif
+
+extern uint8_t mk_delay;
+extern uint8_t mk_interval;
+extern uint8_t mk_max_speed;
+extern uint8_t mk_time_to_max;
+extern uint8_t mk_wheel_max_speed;
+extern uint8_t mk_wheel_time_to_max;
 
 
 void mousekey_task(void);
@@ -66,4 +70,8 @@ void mousekey_off(uint8_t code);
 void mousekey_clear(void);
 void mousekey_send(void);
 
+#ifdef __cplusplus
+}
+#endif
+
 #endif
diff --git a/common/progmem.h b/common/progmem.h
new file mode 100644
index 000000000..09aeb8b7c
--- /dev/null
+++ b/common/progmem.h
@@ -0,0 +1,11 @@
+#ifndef PROGMEM_H
+#define PROGMEM_H 1
+
+#if defined(__AVR__)
+#   include <avr/pgmspace.h>
+#elif defined(__arm__)
+#   define PROGMEM
+#   define pgm_read_byte(p)     *(p)
+#endif
+
+#endif
diff --git a/common/suspend.h b/common/suspend.h
index 1c1e41ac3..9b76f280d 100644
--- a/common/suspend.h
+++ b/common/suspend.h
@@ -3,26 +3,6 @@
 
 #include <stdint.h>
 #include <stdbool.h>
-#include <avr/sleep.h>
-#include <avr/wdt.h>
-#include <avr/interrupt.h>
-
-
-#define wdt_intr_enable(value)   \
-__asm__ __volatile__ (  \
-    "in __tmp_reg__,__SREG__" "\n\t"    \
-    "cli" "\n\t"    \
-    "wdr" "\n\t"    \
-    "sts %0,%1" "\n\t"  \
-    "out __SREG__,__tmp_reg__" "\n\t"   \
-    "sts %0,%2" "\n\t" \
-    : /* no outputs */  \
-    : "M" (_SFR_MEM_ADDR(_WD_CONTROL_REG)), \
-    "r" (_BV(_WD_CHANGE_BIT) | _BV(WDE)), \
-    "r" ((uint8_t) ((value & 0x08 ? _WD_PS3_MASK : 0x00) | \
-        _BV(WDIE) | (value & 0x07)) ) \
-    : "r0"  \
-)
 
 
 void suspend_power_down(void);
diff --git a/keyboard/mbed_onekey/Makefile b/keyboard/mbed_onekey/Makefile
index 1bc91bc7e..e686f424e 100644
--- a/keyboard/mbed_onekey/Makefile
+++ b/keyboard/mbed_onekey/Makefile
@@ -18,6 +18,8 @@ OBJECTS = \
 	$(OBJDIR)/./mbed_driver.o \
 	$(OBJDIR)/./main.o
 
+CONFIG_H = config.h
+
 SYS_OBJECTS = 
 
 INCLUDE_PATHS = -I.
@@ -25,6 +27,12 @@ INCLUDE_PATHS = -I.
 LIBRARY_PATHS = 
 LIBRARIES = 
 
+# Build Options
+#   Comment out to disable
+#BOOTMAGIC_ENABLE = yes
+MOUSEKEY_ENABLE = yes
+
+
 include mbed.mk
 include common.mk
 include gcc.mk
diff --git a/keyboard/mbed_onekey/common.mk b/keyboard/mbed_onekey/common.mk
index 6eb7f7699..1bd7d6edb 100644
--- a/keyboard/mbed_onekey/common.mk
+++ b/keyboard/mbed_onekey/common.mk
@@ -1,21 +1,79 @@
 COMMON_DIR = common
 OBJECTS += \
-	$(OBJDIR)/$(COMMON_DIR)/mbed/timer.o \
-	$(OBJDIR)/$(COMMON_DIR)/mbed/xprintf.o \
 	$(OBJDIR)/$(COMMON_DIR)/action.o \
 	$(OBJDIR)/$(COMMON_DIR)/action_tapping.o \
 	$(OBJDIR)/$(COMMON_DIR)/action_macro.o \
 	$(OBJDIR)/$(COMMON_DIR)/action_layer.o \
 	$(OBJDIR)/$(COMMON_DIR)/action_util.o \
 	$(OBJDIR)/$(COMMON_DIR)/host.o \
+	$(OBJDIR)/$(COMMON_DIR)/keymap.o \
+	$(OBJDIR)/$(COMMON_DIR)/keyboard.o \
+	$(OBJDIR)/$(COMMON_DIR)/util.o \
+	$(OBJDIR)/$(COMMON_DIR)/mbed/suspend.o \
+	$(OBJDIR)/$(COMMON_DIR)/mbed/timer.o \
+	$(OBJDIR)/$(COMMON_DIR)/mbed/xprintf.o \
+	$(OBJDIR)/$(COMMON_DIR)/mbed/bootloader.o \
 
 INCLUDE_PATHS += \
 	-I$(TMK_DIR)/$(COMMON_DIR)
 
+CC_FLAGS += -include $(CONFIG_H)
 
 
 
-#	$(OBJDIR)/$(COMMON_DIR)/keyboard.o \
-#	$(OBJDIR)/$(COMMON_DIR)/keymap.o \
-#	$(OBJDIR)/$(COMMON_DIR)/bootloader.o \
-#	$(OBJDIR)/$(COMMON_DIR)/suspend.o \
+# Option modules
+ifdef BOOTMAGIC_ENABLE
+    $(error Not Supported)
+    OBJECTS += $(OBJDIR)/$(COMMON_DIR)/bootmagic.o
+    OBJECTS += $(OBJDIR)/$(COMMON_DIR)/mbed/eeprom.o
+    OPT_DEFS += -DBOOTMAGIC_ENABLE
+endif
+
+ifdef MOUSEKEY_ENABLE
+    OBJECTS += $(OBJDIR)/$(COMMON_DIR)/mousekey.o
+    OPT_DEFS += -DMOUSEKEY_ENABLE
+    OPT_DEFS += -DMOUSE_ENABLE
+endif
+
+ifdef EXTRAKEY_ENABLE
+    $(error Not Supported)
+    OPT_DEFS += -DEXTRAKEY_ENABLE
+endif
+
+ifdef CONSOLE_ENABLE
+    $(error Not Supported)
+    OPT_DEFS += -DCONSOLE_ENABLE
+else
+    OPT_DEFS += -DNO_PRINT
+    OPT_DEFS += -DNO_DEBUG
+endif
+
+ifdef COMMAND_ENABLE
+    $(error Not Supported)
+    SRC += $(COMMON_DIR)/command.c
+    OPT_DEFS += -DCOMMAND_ENABLE
+endif
+
+ifdef NKRO_ENABLE
+    $(error Not Supported)
+    OPT_DEFS += -DNKRO_ENABLE
+endif
+
+ifdef SLEEP_LED_ENABLE
+    $(error Not Supported)
+    SRC += $(COMMON_DIR)/sleep_led.c
+    OPT_DEFS += -DSLEEP_LED_ENABLE
+    OPT_DEFS += -DNO_SUSPEND_POWER_DOWN
+endif
+
+ifdef BACKLIGHT_ENABLE
+    $(error Not Supported)
+    SRC += $(COMMON_DIR)/backlight.c
+    OPT_DEFS += -DBACKLIGHT_ENABLE
+endif
+
+ifdef KEYMAP_SECTION_ENABLE
+    $(error Not Supported)
+    OPT_DEFS += -DKEYMAP_SECTION_ENABLE
+    EXTRALDFLAGS = -Wl,-L$(TOP_DIR),-Tldscript_keymap_avr5.x
+endif
diff --git a/keyboard/mbed_onekey/config.h b/keyboard/mbed_onekey/config.h
new file mode 100644
index 000000000..a3aadd038
--- /dev/null
+++ b/keyboard/mbed_onekey/config.h
@@ -0,0 +1,7 @@
+#ifndef CONFIG_H
+#define CONFIG_H
+
+#define MATRIX_ROWS 1
+#define MATRIX_COLS 1
+
+#endif
diff --git a/keyboard/mbed_onekey/gcc.mk b/keyboard/mbed_onekey/gcc.mk
index e31527bbc..0fc41fe27 100644
--- a/keyboard/mbed_onekey/gcc.mk
+++ b/keyboard/mbed_onekey/gcc.mk
@@ -10,7 +10,8 @@ SIZE 	= $(GCC_BIN)arm-none-eabi-size
 CHKSUM  = ~/Dropbox/MBED/tool/lpc-vector-checksum
 
 CPU = -mcpu=cortex-m0 -mthumb
-CC_FLAGS = $(CPU) -c -g -fno-common -fmessage-length=0 -Wall -fno-exceptions -ffunction-sections -fdata-sections 
+
+CC_FLAGS += $(CPU) -c -g -fno-common -fmessage-length=0 -Wall -fno-exceptions -ffunction-sections -fdata-sections
 CC_FLAGS += -MMD -MP
 CC_SYMBOLS = -DTARGET_LPC11U35_401 -DTARGET_M0 -DTARGET_NXP -DTARGET_LPC11UXX -DTOOLCHAIN_GCC_ARM -DTOOLCHAIN_GCC -D__CORTEX_M0 -DARM_MATH_CM0 -DMBED_BUILD_TIMESTAMP=1399108688.49 -D__MBED__=1 
 
diff --git a/keyboard/mbed_onekey/main.cpp b/keyboard/mbed_onekey/main.cpp
index 1df940aa9..b2f7243c8 100644
--- a/keyboard/mbed_onekey/main.cpp
+++ b/keyboard/mbed_onekey/main.cpp
@@ -1,66 +1,43 @@
-#include "mbed.h"
-#include "HIDKeyboard.h"
-#include "debug.h"
-#include "timer.h"
- 
-/*
-//#define DEBUG 
-#ifdef DEBUG
-Serial ser(UART_TX, UART_RX);
-#define dprintf(fmt, ...)	    ser.printf(fmt, ## __VA_ARGS__)
-#else
-#define dprintf(fmt, ...)
-#endif
-*/
-
-
-// button and LEDs
-DigitalIn isp(P0_1);
-DigitalOut led_red(P0_20);
-DigitalOut led_green(P0_21);
-
-//USBKeyboard
-HIDKeyboard keyboard;
- 
-
-int main(void) {
-    //isp.mode(PullUp);
-    //led_red = 0;
-    //led_green = 0;
-    debug_enable = true;
-    dprintf("HIDKeyboard:\r\n");
-
-    timer_init();
-    xprintf("timer: %i\r\n", timer_read());
-
-    report_keyboard_t report = { 2, 0, 4, }; //a
-    report_keyboard_t report_off = { 0 };
-
-    bool last_isp = isp;
-    uint32_t last_timer;
-    while (1) {
-        //keyboard.mediaControl(KEY_VOLUME_DOWN);
-        //keyboard.printf("Hello World from Mbed\r\n");
-        //keyboard.keyCode('s', KEY_CTRL);
-        //keyboard.keyCode(KEY_CAPS_LOCK);
-
-        //led_green = !led_green;
-        //leds = keyboard.lockStatus();
-        //ser.putc(ser.getc());
-
-        if (last_isp == isp) continue;
-        if (isp == 0) {
-            led_red = 0;    // on
-    xprintf("timer: %i\r\n", timer_read32());
-    xprintf("diff: %i\r\n", timer_elapsed32(last_timer));
-            //keyboard.sendReport(report);
-        } else {
-            led_red = 1;    // off
-            //keyboard.sendReport(report_off);
-        }
-        last_isp = isp;
-        last_timer = timer_read();
-        //led_green = !led_green;
-        //wait(0.5);
-    }
-}
+#include "mbed.h"
+#include "debug.h"
+#include "timer.h"
+#include "action.h"
+#include "keycode.h"
+#include "host.h"
+#include "host_driver.h"
+#include "mbed_driver.h"
+ 
+
+// Button and LEDs of LPC11U35 board
+DigitalIn isp(P0_1);            // ISP button
+DigitalOut led_red(P0_20);
+DigitalOut led_green(P0_21);
+
+
+int main(void) {
+    isp.mode(PullUp);
+    led_red = 1;
+    led_green = 0;
+
+    timer_init();
+    host_set_driver(&mbed_driver);
+
+    //debug_enable = true;
+    xprintf("mbed_onekey ver.eee:\r\n");
+
+
+    bool last_isp = isp;
+    while (1) {
+        //led_green = !led_green;
+        if (last_isp == isp) continue;
+        last_isp = isp;
+        if (last_isp == 0) {
+            led_red = 0;    // on
+            dprintf("timer: %i\r\n", timer_read());
+            register_code(KC_A);
+        } else {
+            led_red = 1;    // off
+            unregister_code(KC_A);
+        }
+    }
+}
diff --git a/keyboard/mbed_onekey/mbed_driver.cpp b/keyboard/mbed_onekey/mbed_driver.cpp
new file mode 100644
index 000000000..333f8e378
--- /dev/null
+++ b/keyboard/mbed_onekey/mbed_driver.cpp
@@ -0,0 +1,41 @@
+#include "HIDKeyboard.h"
+#include "host.h"
+#include "host_driver.h"
+#include "mbed_driver.h"
+
+HIDKeyboard keyboard;
+
+
+/* Host driver */
+static uint8_t keyboard_leds(void);
+static void send_keyboard(report_keyboard_t *report);
+static void send_mouse(report_mouse_t *report);
+static void send_system(uint16_t data);
+static void send_consumer(uint16_t data);
+
+host_driver_t mbed_driver = {
+    keyboard_leds,
+    send_keyboard,
+    send_mouse,
+    send_system,
+    send_consumer
+};
+
+
+static uint8_t keyboard_leds(void)
+{
+    return 0;
+}
+static void send_keyboard(report_keyboard_t *report)
+{
+    keyboard.sendReport(*report);
+}
+static void send_mouse(report_mouse_t *report)
+{
+}
+static void send_system(uint16_t data)
+{
+}
+static void send_consumer(uint16_t data)
+{
+}
diff --git a/keyboard/mbed_onekey/mbed_driver.h b/keyboard/mbed_onekey/mbed_driver.h
new file mode 100644
index 000000000..dd1153b43
--- /dev/null
+++ b/keyboard/mbed_onekey/mbed_driver.h
@@ -0,0 +1,3 @@
+#include "host_driver.h"
+
+extern host_driver_t mbed_driver;