diff --git a/OpenCR.mk b/OpenCR.mk
new file mode 100644
index 0000000..da97dc8
--- /dev/null
+++ b/OpenCR.mk
@@ -0,0 +1,273 @@
+########################################################################
+#
+# Support for Robotis OpenCR boards 
+#
+# Written by Dowhan Jeong, EunJin Jeong
+#
+# Based on work that is copyright Jeremy Shaw, Sudar, Nicholas Zambetti,
+# David A. Mellis & Hernando Barragan.
+#
+# This file 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.
+#
+########################################################################
+
+ifndef ARDUINO_DIR
+echo $(error ARDUINO_DIR should be specified)
+endif
+
+ifndef BOARD_TAG
+echo $(error BOARD_TAG should be specified. check board list with 'make show_boards')
+endif
+
+ifndef ARDMK_DIR
+    ARDMK_DIR := $(realpath $(dir $(realpath $(lastword $(MAKEFILE_LIST)))))
+endif
+
+include $(ARDMK_DIR)/Common.mk
+
+ifndef ARDUINO_PACKAGE_DIR
+    # attempt to find based on Linux, macOS and Windows default
+    ARDUINO_PACKAGE_DIR := $(firstword \
+        $(call dir_if_exists,$(HOME)/.arduino15/packages) \
+        $(call dir_if_exists,$(ARDUINO_DIR)/packages) \
+        $(call dir_if_exists,$(HOME)/Library/Arduino15/packages) \
+        $(call dir_if_exists,$(realpath $(USERPROFILE))/AppData/Local/Arduino15/packages) )
+    $(call show_config_variable,ARDUINO_PACKAGE_DIR,[AUTODETECTED],(from DEFAULT))
+else
+    $(call show_config_variable,ARDUINO_PACKAGE_DIR,[USER])
+endif
+
+ifndef ARDMK_VENDOR
+    ARDMK_VENDOR         = OpenCR
+endif
+
+ifndef ARCHITECTURE
+    ARCHITECTURE := OpenCR
+endif
+
+ifndef CORE_VER
+    CORE_VER := $(wildcard $(ARDUINO_PACKAGE_DIR)/$(ARDMK_VENDOR)/hardware/$(ARCHITECTURE)/1.*)
+    ifneq ($(CORE_VER),)
+        CORE_VER := $(shell basename $(CORE_VER))
+        $(call show_config_variable,CORE_VER,[AUTODETECTED],(from ARDUINO_PACKAGE_DIR))
+    endif
+else
+    $(call show_config_variable,CORE_VER,[USER])
+endif
+
+ARCHITECTURE := sam
+
+arduino_output =
+# When output is not suppressed and we're in the top-level makefile,
+# running for the first time (i.e., not after a restart after
+# regenerating the dependency file), then output the configuration.
+ifndef ARDUINO_QUIET
+    ifeq ($(MAKE_RESTARTS),)
+        ifeq ($(MAKELEVEL),0)
+            arduino_output = $(info $(1))
+        endif
+    endif
+endif
+
+# Arduino Settings (will get shown in Arduino.mk as computed)
+ifndef ALTERNATE_CORE_PATH
+    ifdef CORE_VER
+	ALTERNATE_CORE_PATH = $(ARDUINO_PACKAGE_DIR)/OpenCR/hardware/OpenCR/$(CORE_VER)
+    else
+	    echo $(error  Cannot find $(CORE_VER). Check directory settings.)
+    endif
+endif
+
+ifndef ARDUINO_CORE_PATH
+        ARDUINO_CORE_PATH= $(ALTERNATE_CORE_PATH)/cores/arduino
+endif
+
+ifndef BOARDS_TXT
+        BOARDS_TXT= $(ALTERNATE_CORE_PATH)/boards.txt
+endif
+
+ifndef VARIANT
+    VARIANT := $(call PARSE_BOARD,$(BOARD_TAG),build.variant)
+endif
+
+ARDUINO_VAR_PATH = $(ALTERNATE_CORE_PATH)/variants/$(VARIANT)
+
+
+# Check boards file exists before continuing as parsing non-existant file can create problems
+ifneq ($(findstring boards.txt, $(wildcard $(ALTERNATE_CORE_PATH)/*.txt)), boards.txt)
+    echo $(error $(CORE_VER) Cannot find boards file $(BOARDS_TXT). Check ?? and board support installed)
+endif
+
+# grab any sources in the variant core path.
+# directorys were manually checked.
+# Core sources(used to generate libcore.a archive)
+OPENCR_CORE_C_SRCS_1 := $(wildcard $(ARDUINO_CORE_PATH)/avr/*.c)
+OPENCR_CORE_C_SRCS_2 := $(wildcard $(ARDUINO_CORE_PATH)/*.c)
+OPENCR_CORE_CPP_SRCS := $(wildcard $(ARDUINO_CORE_PATH)/*.cpp)
+
+# library sources
+OPENCR_LIB_C_SRCS_1 := $(wildcard $(ARDUINO_VAR_PATH)/bsp/opencr/*.c)
+OPENCR_LIB_C_SRCS_2 := $(wildcard $(ARDUINO_VAR_PATH)/hw/*.c)
+OPENCR_LIB_C_SRCS_3 := $(wildcard $(ARDUINO_VAR_PATH)/hw/driver/*.c)
+OPENCR_LIB_C_SRCS_4 := $(wildcard $(ARDUINO_VAR_PATH)/hw/usb_cdc/*.c)
+OPENCR_LIB_C_SRCS_5 := $(wildcard $(ARDUINO_VAR_PATH)/lib/STM32F7xx_HAL_Driver/Src/*.c)
+OPENCR_LIB_CPP_SRCS := $(wildcard $(ARDUINO_VAR_PATH)/*.cpp)
+OPENCR_LIB_S_SRCS := $(wildcard $(ARDUINO_VAR_PATH)/bsp/opencr/startup/*.S)
+
+ifndef F_CPU
+    F_CPU := $(call PARSE_BOARD,$(BOARD_TAG),build.f_cpu)
+endif
+
+OPENCR_LIB_OBJ_FILES = $(notdir $(OPENCR_LIB_C_SRCS_1:.c=.c.o)) $(notdir $(OPENCR_LIB_C_SRCS_2:.c=.c.o)) $(notdir $(OPENCR_LIB_C_SRCS_3:.c=.c.o)) $(notdir $(OPENCR_LIB_C_SRCS_4:.c=.c.o)) $(notdir $(OPENCR_LIB_C_SRCS_5:.c=.c.o)) $(notdir $(OPENCR_LIB_CPP_SRCS:.cpp=.cpp.o)) $(notdir $(OPENCR_LIB_S_SRCS:.S=.S.o))
+    OTHER_OBJS = $(patsubst %, \
+	   $(OBJDIR)/OpenCRlib/%, $(OPENCR_LIB_OBJ_FILES)) 
+
+OPENCR_CORE_OBJ_FILES = $(notdir $(OPENCR_CORE_C_SRCS_1:.c=.c.o)) $(notdir $(OPENCR_CORE_C_SRCS_2:.c=.c.o)) $(notdir $(OPENCR_CORE_CPP_SRCS:.cpp=.cpp.o))
+# override is used since opencr dosen't need other sam core objects
+override CORE_OBJS = $(patsubst %, \
+			 $(OBJDIR)/core/%, $(OPENCR_CORE_OBJ_FILES))
+
+ifndef AVR_TOOLS_DIR
+	AVR_TOOLS_DIR = $(call dir_if_exists,$(ARDUINO_PACKAGE_DIR)/OpenCR/tools/opencr_gcc/5.4.0-2016q2)
+endif
+ifeq ($(strip $(AVR_TOOLS_DIR)),)
+    echo $(error $(AVR_TOOLS_DIR) Cannot find AVR_TOOLS_DIR. Check AVR_TOOLS_DIR)
+endif
+
+# Robotis OpenCR platform library directory
+ifndef ARDUINO_PLATFORM_LIB_PATH
+    ARDUINO_PLATFORM_LIB_PATH = $(ALTERNATE_CORE_PATH)/libraries
+    $(call show_config_variable,ARDUINO_PLATFORM_LIB_PATH,[COMPUTED],(from OPENCR_DIR))
+endif
+
+########################################################################
+# command names
+
+TOOL_PREFIX = arm-none-eabi
+
+# processor stuff
+ifndef MCU
+    MCU := $(call PARSE_BOARD,$(BOARD_TAG),build.mcu)
+endif
+
+ifndef MCU_FLAG_NAME
+    MCU_FLAG_NAME=mcpu
+endif
+
+########################################################################
+# FLAGS
+ifndef USB_TYPE
+    USB_TYPE = USB_SERIAL
+endif
+
+# from platform.txt
+CPPFLAGS += -DARDUINO_OpenCR
+CPPFLAGS += -DARDUINO_ARCH_OPENCR
+
+CPPFLAGS += $(call PARSE_BOARD,$(BOARD_TAG),build.common_flags)
+
+OPENCR_COMPILER_LIBS_C_FLAGS +=-I$(ARDUINO_VAR_PATH)/$(call PARSE_BOARD,$(BOARD_TAG),build.inc1)
+OPENCR_COMPILER_LIBS_C_FLAGS +=-I$(ARDUINO_VAR_PATH)/$(call PARSE_BOARD,$(BOARD_TAG),build.inc2)
+OPENCR_COMPILER_LIBS_C_FLAGS +=-I$(ARDUINO_VAR_PATH)/$(call PARSE_BOARD,$(BOARD_TAG),build.inc3)
+OPENCR_COMPILER_LIBS_C_FLAGS +=-I$(ARDUINO_VAR_PATH)/$(call PARSE_BOARD,$(BOARD_TAG),build.inc4)
+OPENCR_COMPILER_LIBS_C_FLAGS +=-I$(ARDUINO_VAR_PATH)/$(call PARSE_BOARD,$(BOARD_TAG),build.inc5)
+OPENCR_COMPILER_LIBS_C_FLAGS +=-I$(ARDUINO_VAR_PATH)/$(call PARSE_BOARD,$(BOARD_TAG),build.inc6)
+OPENCR_COMPILER_LIBS_C_FLAGS +=-I$(ARDUINO_VAR_PATH)/$(call PARSE_BOARD,$(BOARD_TAG),build.inc7)
+CPPFLAGS += $(OPENCR_COMPILER_LIBS_C_FLAGS)
+
+CFLAGS_STD += -c -g -O2 -std=gnu11 -mfloat-abi=softfp -mfpu=fpv5-sp-d16 -Wall -Wextra -DDEBUG_LEVEL=DEBUG_ALL -MMD -ffunction-sections -fdata-sections -nostdlib --param max-inline-insns-single=500 -DBOARD_$(VARIANT)
+
+CXXFLAGS_STD += -c -g -O2 -std=gnu++11 -mfloat-abi=softfp -mfpu=fpv5-sp-d16  -Wall -Wextra -DDEBUG_LEVEL=DEBUG_ALL -MMD -ffunction-sections -fdata-sections -nostdlib --param max-inline-insns-single=500 -fno-rtti -fno-exceptions -DBOARD_$(VARIANT)
+
+ASFLAGS += -c -g -x assembler-with-cpp -MMD
+
+LDFLAGS += -lm -lgcc -mthumb -Wl,--cref -Wl,--check-sections -Wl,--gc-sections -Wl,--unresolved-symbols=report-all -Wl,--warn-common -Wl,--warn-unresolved-symbols -Wl,--start-group -Wl,--whole-archive
+
+LINKER_SCRIPTS = -T$(ARDUINO_VAR_PATH)/bsp/opencr/ldscript/opencr_flash.ld
+########################################################################
+# Reset is handled by upload script. OpenCR don't neet reset command.
+override RESET_CMD = 
+
+########################################################################
+# Object conversion & uploading magic, modified from Arduino.mk
+override TARGET_HEX = $(OBJDIR)/$(TARGET).bin
+
+override avr_size = $(SIZE) --target=binary $(2)
+
+# Define UPLOAD_TOOL as avrdude to use avrdude upload recipe in Arduino.mk
+override UPLOAD_TOOL = avrdude
+
+ifeq ($(CURRENT_OS), WINDOWS)
+    override AVRDUDE = $(ARDUINO_PACKAGE_DIR)/OpenCR/tools/opencr_tools/1.0.0/win/opencr_ld.exe
+else
+    override AVRDUDE = $(ARDUINO_PACKAGE_DIR)/OpenCR/tools/opencr_tools/1.0.0/linux/opencr_ld
+endif
+override AVRDUDE_COM_OPTS = $(DEVICE_PATH) 
+override AVRDUDE_ISP_OPTS = 115200 $(TARGET_HEX) 1
+override AVRDUDE_ISPLOAD_OPTS = 
+
+########################################################################
+# automatically include Arduino.mk
+
+include $(ARDMK_DIR)/Arduino.mk
+
+########################################################################
+
+# OpenCR core files
+$(OBJDIR)/core/%.c.o: $(ARDUINO_CORE_PATH)/avr/%.c $(COMMON_DEPS) | $(OBJDIR)
+	@$(MKDIR) $(dir $@)
+	$(CC) -MMD -c $(CPPFLAGS) $(CFLAGS) $< -o $@
+
+$(OBJDIR)/core/%.c.o: $(ARDUINO_CORE_PATH)/%.c $(COMMON_DEPS) | $(OBJDIR)
+	@$(MKDIR) $(dir $@)
+	$(CC) -MMD -c $(CPPFLAGS) $(CFLAGS) $< -o $@
+
+$(OBJDIR)/core/%.cpp.o: $(ARDUINO_CORE_PATH)/%.cpp $(COMMON_DEPS) | $(OBJDIR)
+	@$(MKDIR) $(dir $@)
+	$(CXX) -MMD -c $(CPPFLAGS) $(CXXFLAGS) $< -o $@
+
+# OpenCR lib files
+$(OBJDIR)/OpenCRlib/%.c.o: $(ARDUINO_VAR_PATH)/bsp/opencr/%.c $(COMMON_DEPS) | $(OBJDIR)
+	@$(MKDIR) $(dir $@)
+	$(CC) -MMD -c $(CPPFLAGS) $(CFLAGS) $< -o $@
+$(OBJDIR)/OpenCRlib/%.c.o: $(ARDUINO_VAR_PATH)/hw/%.c $(COMMON_DEPS) | $(OBJDIR)
+	@$(MKDIR) $(dir $@)
+	$(CC) -MMD -c $(CPPFLAGS) $(CFLAGS) $< -o $@
+
+$(OBJDIR)/OpenCRlib/%.c.o: $(ARDUINO_VAR_PATH)/hw/driver/%.c $(COMMON_DEPS) | $(OBJDIR)
+	@$(MKDIR) $(dir $@)
+	$(CC) -MMD -c $(CPPFLAGS) $(CFLAGS) $< -o $@
+
+$(OBJDIR)/OpenCRlib/%.c.o: $(ARDUINO_VAR_PATH)/hw/usb_cdc/%.c $(COMMON_DEPS) | $(OBJDIR)
+	@$(MKDIR) $(dir $@)
+	$(CC) -MMD -c $(CPPFLAGS) $(CFLAGS) $< -o $@
+
+$(OBJDIR)/OpenCRlib/%.c.o: $(ARDUINO_VAR_PATH)/lib/STM32F7xx_HAL_Driver/Src/%.c $(COMMON_DEPS) | $(OBJDIR)
+	@$(MKDIR) $(dir $@)
+	$(CC) -MMD -c $(CPPFLAGS) $(CFLAGS) $< -o $@
+
+$(OBJDIR)/OpenCRlib/%.cpp.o: $(ARDUINO_VAR_PATH)/%.cpp $(COMMON_DEPS) | $(OBJDIR)
+	@$(MKDIR) $(dir $@)
+	$(CXX) -MMD -c $(CPPFLAGS) $(CXXFLAGS) $< -o $@
+
+$(OBJDIR)/OpenCRlib/%.S.o: $(ARDUINO_VAR_PATH)/bsp/opencr/startup/%.S $(COMMON_DEPS) | $(OBJDIR)
+	@$(MKDIR) $(dir $@)
+	$(CC) -MMD -c $(CPPFLAGS) $(ASFLAGS) $< -o $@
+
+# Object conversion & uploading magic, modified from Arduino.mk
+$(OBJDIR)/%.bin: $(OBJDIR)/%.elf $(COMMON_DEPS)
+	@$(MKDIR) $(dir $@)
+	$(OBJCOPY) -v -Obinary $< $@
+	@$(ECHO) '\n'
+	$(call avr_size,$<,$@)
+ifneq ($(strip $(HEX_MAXIMUM_SIZE)),)
+	@if [ `$(SIZE) --target=binary $@ | awk 'FNR == 2 {print $$2}'` -le $(HEX_MAXIMUM_SIZE) ]; then touch $@.sizeok; fi
+else
+	@$(ECHO) "Maximum flash memory of $(BOARD_TAG) is not specified. Make sure the size of $@ is less then $(BOARD_TAG)\'s flash memory"
+	@touch $@.sizeok
+endif
+
+CORE_LIB += -Wl,--no-whole-archive -lstdc++
diff --git a/README.md b/README.md
index f4cbbc5..e2f0fae 100644
--- a/README.md
+++ b/README.md
@@ -11,6 +11,7 @@ This is a very simple Makefile which knows how to build Arduino sketches. It def
 and includes on-device debugging targets.
 - Supports chipKIT
 - Supports Teensy 3.x (via Teensyduino)
+- Supports Robotis OpenCR 1.0
 - Works on all three major OS (Mac, Linux, Windows)
 - Auto detects serial baud rate and libraries used
 - Support for `*.ino` and `*.pde` sketches as well as raw `*.c` and `*.cpp`
diff --git a/examples/BlinkOpenCR/BlinkOpenCR.ino b/examples/BlinkOpenCR/BlinkOpenCR.ino
new file mode 100644
index 0000000..aabf2a8
--- /dev/null
+++ b/examples/BlinkOpenCR/BlinkOpenCR.ino
@@ -0,0 +1,48 @@
+/*
+ * Blink(LED)
+ */
+
+
+#define BDPIN_LED_USER_1        22
+#define BDPIN_LED_USER_2        23
+#define BDPIN_LED_USER_3        24
+#define BDPIN_LED_USER_4        25
+
+
+int led_pin = 13;
+int led_pin_user[4] = { BDPIN_LED_USER_1, BDPIN_LED_USER_2, BDPIN_LED_USER_3, BDPIN_LED_USER_4 };
+
+void setup() {
+  // Set up the built-in LED pin as an output:
+  pinMode(led_pin, OUTPUT);
+  pinMode(led_pin_user[0], OUTPUT);
+  pinMode(led_pin_user[1], OUTPUT);
+  pinMode(led_pin_user[2], OUTPUT);
+  pinMode(led_pin_user[3], OUTPUT);
+
+  Serial.begin(115200);
+
+}
+
+void loop() {
+  int i;
+
+  digitalWrite(led_pin, HIGH);  // set to as HIGH LED is turn-off
+  delay(100);                   // Wait for 0.1 second
+  digitalWrite(led_pin, LOW);   // set to as LOW LED is turn-on
+  delay(100);                   // Wait for 0.1 second
+
+
+  for( i=0; i<4; i++ )
+  {
+    digitalWrite(led_pin_user[i], HIGH);
+    delay(100);
+  }
+  for( i=0; i<4; i++ )
+  {
+    digitalWrite(led_pin_user[i], LOW);
+    delay(100);
+  }
+
+  Serial.println( String(10) );
+}
diff --git a/examples/BlinkOpenCR/Makefile b/examples/BlinkOpenCR/Makefile
new file mode 100644
index 0000000..d4422f4
--- /dev/null
+++ b/examples/BlinkOpenCR/Makefile
@@ -0,0 +1,8 @@
+BOARD_TAG    = OpenCR
+
+
+ARDUINO_LIBS =
+
+#MONITOR_PORT = /dev/ttyACM0
+
+include ../../OpenCR.mk