From 236c96ec42048470382e854cac3e7514ca0b97c6 Mon Sep 17 00:00:00 2001
From: Imre Kiss <kissi@inf.u-szeged.hu>
Date: Mon, 4 Apr 2016 09:41:31 +0200
Subject: [PATCH 1/3] New target for Discovery STM32F4 board

JerryScript-DCO-1.0-Signed-off-by: Imre Kiss kissi@inf.u-szeged.hu
---
 targets/mbedstm32f4/.yotta.json               |   6 +
 targets/mbedstm32f4/Makefile.mbedstm32f4      |  67 +++++++
 targets/mbedstm32f4/js/blink.js               |   9 +
 targets/mbedstm32f4/js/main.js                |   5 +
 targets/mbedstm32f4/module.json               |  12 ++
 targets/mbedstm32f4/readme.md                 | 170 ++++++++++++++++++
 targets/mbedstm32f4/source/jerry_extapi.cpp   | 130 ++++++++++++++
 targets/mbedstm32f4/source/jerry_extapi.h     |  38 ++++
 targets/mbedstm32f4/source/jerry_port.c       |  55 ++++++
 targets/mbedstm32f4/source/jerry_run.cpp      | 125 +++++++++++++
 targets/mbedstm32f4/source/jerry_run.h        |  24 +++
 targets/mbedstm32f4/source/main.cpp           |  75 ++++++++
 targets/mbedstm32f4/source/makejerry.cmake    |  30 ++++
 .../mbedstm32f4/source/native_mbedstm32f4.cpp |  25 +++
 .../mbedstm32f4/source/native_mbedstm32f4.h   |  21 +++
 15 files changed, 792 insertions(+)
 create mode 100644 targets/mbedstm32f4/.yotta.json
 create mode 100644 targets/mbedstm32f4/Makefile.mbedstm32f4
 create mode 100644 targets/mbedstm32f4/js/blink.js
 create mode 100644 targets/mbedstm32f4/js/main.js
 create mode 100644 targets/mbedstm32f4/module.json
 create mode 100644 targets/mbedstm32f4/readme.md
 create mode 100644 targets/mbedstm32f4/source/jerry_extapi.cpp
 create mode 100644 targets/mbedstm32f4/source/jerry_extapi.h
 create mode 100644 targets/mbedstm32f4/source/jerry_port.c
 create mode 100644 targets/mbedstm32f4/source/jerry_run.cpp
 create mode 100644 targets/mbedstm32f4/source/jerry_run.h
 create mode 100644 targets/mbedstm32f4/source/main.cpp
 create mode 100644 targets/mbedstm32f4/source/makejerry.cmake
 create mode 100644 targets/mbedstm32f4/source/native_mbedstm32f4.cpp
 create mode 100644 targets/mbedstm32f4/source/native_mbedstm32f4.h

diff --git a/targets/mbedstm32f4/.yotta.json b/targets/mbedstm32f4/.yotta.json
new file mode 100644
index 0000000000..eaed7515c2
--- /dev/null
+++ b/targets/mbedstm32f4/.yotta.json
@@ -0,0 +1,6 @@
+{
+  "build": {
+    "target": "stm32f4-disco-gcc,*",
+    "targetSetExplicitly": true
+  }
+}
diff --git a/targets/mbedstm32f4/Makefile.mbedstm32f4 b/targets/mbedstm32f4/Makefile.mbedstm32f4
new file mode 100644
index 0000000000..abe8ce2679
--- /dev/null
+++ b/targets/mbedstm32f4/Makefile.mbedstm32f4
@@ -0,0 +1,67 @@
+# Copyright 2015 Samsung Electronics Co., Ltd.
+#
+# Licensed under the Apache License, Version 2.0 (the "License");
+# you may not use this file except in compliance with the License.
+# You may obtain a copy of the License at
+#
+#     http://www.apache.org/licenses/LICENSE-2.0
+#
+# Unless required by applicable law or agreed to in writing, software
+# distributed under the License is distributed on an "AS IS" BASIS
+# WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+# See the License for the specific language governing permissions and
+# limitations under the License.
+
+# use TAB-8
+
+CURDIR     = `pwd`
+TYPE       = release
+INTERM     = build/obj-mbed-stm32f4
+OUTPUT     = build/bin/$(TYPE).mbedstm32f4
+COPYTARGET = targets/mbedstm32f4/libjerry
+JERRYHEAP  ?= 16
+
+EXT_CFLAGS := -D__TARGET_MBED_STM32F4
+EXT_CFLAGS += -mlittle-endian -mthumb -mcpu=cortex-m4
+EXT_CFLAGS += -Wno-error=format=
+
+.PHONY: jerry js2c yotta flash clean
+
+all: jerry js2c yotta
+
+jerry:
+	mkdir -p $(INTERM)
+	mkdir -p $(OUTPUT)
+	mkdir -p $(COPYTARGET)
+	cmake -B$(INTERM) -H./ \
+	 -DENABLE_LTO=OFF \
+	 -DENABLE_VALGRIND=OFF \
+	 -DCMAKE_TOOLCHAIN_FILE=build/configs/toolchain_external.cmake \
+	 -DUSE_COMPILER_DEFAULT_LIBC=YES \
+	 -DEXTERNAL_CMAKE_SYSTEM_PROCESSOR=arm7-m \
+	 -DEXTERNAL_CMAKE_C_COMPILER=arm-none-eabi-gcc \
+	 -DEXTERNAL_CMAKE_C_COMPILER_ID=GNU \
+	 -DEXTERNAL_COMPILE_FLAGS="$(EXT_CFLAGS)" \
+	 -DEXTERNAL_MEM_HEAP_SIZE_KB=$(JERRYHEAP)
+
+	make -C $(INTERM) $(TYPE).external
+	cp `cat $(INTERM)/$(TYPE).external/list` $(OUTPUT)/.
+	cp $(OUTPUT)/lib$(TYPE).jerry-core.a $(COPYTARGET)/libjerrycore.a
+	cp $(OUTPUT)/lib$(TYPE).jerry-fdlibm.third_party.lib.a $(COPYTARGET)/libfdlibm.a
+
+js2c:
+	cd targets/mbedstm32f4; ../tools/js2c.py;
+
+yotta:
+	cd targets/mbedstm32f4; \
+	 yotta target stm32f4-disco-gcc; \
+	 yotta build
+
+flash:
+	st-flash write targets/mbedstm32f4/build/stm32f4-disco-gcc/source/jerry.bin 0x08000000
+	@echo "Jerry on the board!"
+
+clean:
+	rm -rf $(INTERM)
+	rm -rf $(OUTPUT)
+	rm -rf targets/mbedstm32f4/build
diff --git a/targets/mbedstm32f4/js/blink.js b/targets/mbedstm32f4/js/blink.js
new file mode 100644
index 0000000000..0e51261393
--- /dev/null
+++ b/targets/mbedstm32f4/js/blink.js
@@ -0,0 +1,9 @@
+var check = 1;
+
+function blink() {
+  var blk = (check > 8) ? 1 : 0;
+  led(1, blk);
+  check = (check >= 10) ? 1 : check+1;
+}
+
+print("blink js OK");
diff --git a/targets/mbedstm32f4/js/main.js b/targets/mbedstm32f4/js/main.js
new file mode 100644
index 0000000000..7063198045
--- /dev/null
+++ b/targets/mbedstm32f4/js/main.js
@@ -0,0 +1,5 @@
+function sysloop(ticknow) {
+  blink();
+}
+
+print("main js OK");
diff --git a/targets/mbedstm32f4/module.json b/targets/mbedstm32f4/module.json
new file mode 100644
index 0000000000..ab872ef1da
--- /dev/null
+++ b/targets/mbedstm32f4/module.json
@@ -0,0 +1,12 @@
+{
+  "name": "jerry",
+  "version": "0.0.1",
+  "bin": "./source",
+  "private": true,
+  "description": "JerryScript in mbed OS - STM32F4",
+  "author": "Imre Kiss",
+  "license": "Apache-2.0",
+  "dependencies": {
+    "mbed-drivers": "^1.5.0"
+  }
+}
diff --git a/targets/mbedstm32f4/readme.md b/targets/mbedstm32f4/readme.md
new file mode 100644
index 0000000000..199fbc391c
--- /dev/null
+++ b/targets/mbedstm32f4/readme.md
@@ -0,0 +1,170 @@
+This folder contains files to run JerryScript in mbed / DISCO-F407VG board (STM32F4).
+
+#### yotta
+
+You need to install yotta before proceeding.
+Please visit http://yottadocs.mbed.com/#installing-on-linux
+
+#### Yotta module dependecies
+
+This board not supported yet. But there is a way to run mbed OS v3.0 and JerryScript on this board.
+
+- Select the yotta target
+```
+yotta target stm32f4-disco-gcc
+```
+This is not an offical target for this board (yet). But you can able to build it.
+
+- Install mbed Drivers
+```
+yotta install mbed-drivers
+```
+
+- Modify the yotta module dependecies
+There are two missing target dependecies in the module tree.
+First module: mbed-hal-st-stm32f407vg
+Second module: cmsis-core-stm32f407xg
+You have to add these modules manually.
+```
+cd yotta_modules/mbed-hal-st-stm32f4
+open module.json in an editor
+add these lines to the targetDependencies:
+
+"stm32f407vg": {
+	"mbed-hal-st-stm32f407vg": "^0.0.1"
+}
+
+cd ../cmsis-core-st
+open module.json in an editor
+add these lines to tha targetDependencies:
+
+"stm32f407xg": {
+	"cmsis-core-stm32f407xg": "^0.0.1"
+}
+```
+
+- Update yotta
+After the changes, you have to update or build yotta
+```
+yotta build
+```
+
+Note: if you run into a module version error after modified the modules tree, you have to check the `mbed-hal-st-stm32f407vg module.json` file’s dependencies block. The correct uvisor-lib version specification is “>=1.0.2”. Should looks like this:
+
+```
+"dependencies": {
+    "cmsis-core": "^1.0.0",
+    "uvisor-lib": ">=1.0.2"
+ }
+```
+
+- Check the yotta "module tree"
+```
+yotta ls
+```
+If everything is good, you will get this output:
+```
+jerry 0.0.0
+┗━ mbed-drivers 0.11.8
+  ┣━ mbed-hal 1.2.1 yotta_modules/mbed-hal
+  ┃ ┗━ mbed-hal-st 1.0.0 yotta_modules/mbed-hal-st
+  ┃   ┗━ mbed-hal-st-stm32f4 1.1.2 yotta_modules/mbed-hal-st-stm32f4
+  ┃     ┣━ uvisor-lib 1.0.12 yotta_modules/uvisor-lib
+  ┃     ┣━ mbed-hal-st-stm32cubef4 1.0.2 yotta_modules/mbed-hal-st-stm32cubef4
+  ┃     ┗━ mbed-hal-st-stm32f407vg 0.0.1 yotta_modules/mbed-hal-st-stm32f407vg
+  ┣━ cmsis-core 1.1.1 yotta_modules/cmsis-core
+  ┃ ┗━ cmsis-core-st 1.0.0 yotta_modules/cmsis-core-st
+  ┃   ┣━ cmsis-core-stm32f4 1.0.5 yotta_modules/cmsis-core-stm32f4
+  ┃   ┗━ cmsis-core-stm32f407xg 0.0.1 yotta_modules/cmsis-core-stm32f407xg
+  ┣━ ualloc 1.0.3 yotta_modules/ualloc
+  ┃ ┗━ dlmalloc 1.0.0 yotta_modules/dlmalloc
+  ┣━ minar 1.0.4 yotta_modules/minar
+  ┃ ┗━ minar-platform 1.0.0 yotta_modules/minar-platform
+  ┃   ┗━ minar-platform-mbed 1.0.0 yotta_modules/minar-platform-mbed
+  ┣━ core-util 1.1.5 yotta_modules/core-util
+  ┗━ compiler-polyfill 1.2.1 yotta_modules/compiler-polyfill
+```
+
+##### Cross-compiler for DISCO-F4
+
+If you don't have any GCC compiler installed, please visit [this]
+(https://launchpad.net/gcc-arm-embedded/+download) page to download GCC 5.2.1
+which was tested for building JerryScript for STM32F4.
+
+#### How to build JerryScript
+It assumes the current folder is the JerryScript root folder.
+
+```
+make -f targets/mbedstm32f4/Makefile.mbedstm32f4 clean
+make -f targets/mbedstm32f4/Makefile.mbedstm32f4 jerry
+```
+
+#### JerryScript output files
+
+Two files will be generated at `targets/mbedstm32f4/libjerry`
+* libjerrycore.a
+* libfdlibm.a
+
+#### Building mbed binary
+
+```
+make -f targets/mbedstm32f4/Makefile.mbedstm32f4 js2c yotta
+```
+
+#### The binary file
+
+The file will be generated at targets/mbedstm32f4/build/stm32f4-disco-gcc/source/jerry.bin
+
+#### Flashing to STM32F4
+
+This borad does not support the drag&drop and Virtual Comm Port features. You will have to use an external tool (for example the STM32 STLink utility) to program your code .bin file.
+
+If you don't have STlink installed, please visit [this]
+(https://github.com/texane/stlink) page to install STLink-v2.
+
+```
+make -f targets/mbedstm32f4/Makefile.mbedstm32f4 flash
+```
+OR
+```
+cd targets/mbedstm32f4/build/stm32f4-disco-gcc/source
+st-flash write jerry.bin 0x08000000
+```
+It assumes the st-flash there is in your /usr/bin folder.
+
+When LED near the USB port flashing stops, press RESET button on the board to execute
+JerryScript led flashing sample program in js folder.
+
+#### How blink sample program works
+
+All `.js` files in `js` folder are executed, with `main.js` in first order.
+`sysloop()` function in main.js is called periodically in every 100msec by
+below code in `main.cpp` `jerry_loop()` (after the `jerrry_init()` finished), which calls `js_loop()`.
+
+```
+  minar::Scheduler::postCallback(jerry_loop).period(minar::milliseconds(100))
+```
+
+`sysloop()` then calls `blink()` in `blink.js` which blinks the `LED` in
+every second.
+
+#### printf
+
+There is no the possibility to use the printf directly in your code.
+If you want to use it, you have to use a TTL to USB adapter and a serial communcation program,
+like [this program](http://www.cyberciti.biz/tips/connect-soekris-single-board-computer-using-minicom.html) and [this adapter](http://www.cpmspectrepi.webspace.virginmedia.com/raspberry_pi/MoinMoinExport/USBtoTtlSerialAdapters.html).
+
+Connect the adapter to the board with the USBTX, USBRX pin (PA10, PA9 in this case), then the board will appear in your host /dev folder.
+
+```
+/dev/ttyUSB0
+```
+
+After you connected the board to the host over the adapter and configurated your serial communicate program,
+you can able use the printf the following way:
+(note: the default baud rate is 9600)
+
+```
+Serial pc(USBTX, USBRX); //tx, rx
+pc.printf("%s\n\r", str);
+```
diff --git a/targets/mbedstm32f4/source/jerry_extapi.cpp b/targets/mbedstm32f4/source/jerry_extapi.cpp
new file mode 100644
index 0000000000..caa5dbb4b8
--- /dev/null
+++ b/targets/mbedstm32f4/source/jerry_extapi.cpp
@@ -0,0 +1,130 @@
+/* Copyright 2014-2015 Samsung Electronics Co., Ltd.
+ *
+ * Licensed under the Apache License, Version 2.0 (the "License");
+ * you may not use this file except in compliance with the License.
+ * You may obtain a copy of the License at
+ *
+ *     http://www.apache.org/licenses/LICENSE-2.0
+ *
+ * Unless required by applicable law or agreed to in writing, software
+ * distributed under the License is distributed on an "AS IS" BASIS
+ * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+ * See the License for the specific language governing permissions and
+ * limitations under the License.
+ */
+
+#include "jerry-core/jerry.h"
+
+#include <stdlib.h>
+#include <stdio.h>
+
+#include "jerry_extapi.h"
+#include "native_mbedstm32f4.h"
+
+#ifndef MIN
+#define MIN(A,B) ((A)<(B)?(A):(B))
+#endif
+
+//-----------------------------------------------------------------------------
+
+#define __UNSED__ __attribute__((unused))
+
+#define DECLARE_HANDLER(NAME) \
+static bool \
+NAME ## _handler (const jerry_api_object_t * function_obj_p __UNSED__, \
+                  const jerry_api_value_t *  this_p __UNSED__, \
+                  jerry_api_value_t *        ret_val_p __UNSED__, \
+                  const jerry_api_value_t    args_p[], \
+                  const jerry_api_length_t   args_cnt)
+
+#define REGISTER_HANDLER(NAME) \
+  register_native_function ( # NAME, NAME ## _handler)
+
+//-----------------------------------------------------------------------------
+
+DECLARE_HANDLER(assert)
+{
+  if (args_cnt == 1
+      && args_p[0].type == JERRY_API_DATA_TYPE_BOOLEAN
+      && args_p[0].u.v_bool == true)
+  {
+    printf (">> Jerry assert true\r\n");
+    return true;
+  }
+  printf ("ERROR: Script assertion failed\n");
+  exit (JERRY_STANDALONE_EXIT_CODE_FAIL);
+  return false;
+}
+
+DECLARE_HANDLER(led)
+{
+  if (args_cnt < 2)
+  {
+    return false;
+  }
+
+  int port, value;
+  port = (int)JS_VALUE_TO_NUMBER (&args_p[0]);
+  value = (int)JS_VALUE_TO_NUMBER (&args_p[1]);
+
+  ret_val_p->type = JERRY_API_DATA_TYPE_BOOLEAN;
+  if (port >=0 && port <= 3)
+  {
+    native_led(port, value);
+    ret_val_p->u.v_bool = true;
+  }
+  else
+  {
+    ret_val_p->u.v_bool = false;
+  }
+  return true;
+}
+
+//-----------------------------------------------------------------------------
+
+static bool
+register_native_function (const char* name,
+                          jerry_external_handler_t handler)
+{
+  jerry_api_object_t *global_obj_p;
+  jerry_api_object_t *reg_func_p;
+  jerry_api_value_t reg_value;
+  bool bok;
+
+  global_obj_p = jerry_api_get_global ();
+  reg_func_p = jerry_api_create_external_function (handler);
+
+  if (!(reg_func_p != NULL
+                && jerry_api_is_function (reg_func_p)
+                && jerry_api_is_constructor (reg_func_p)))
+  {
+    printf ("Error: create_external_function failed !!!\r\n");
+    jerry_api_release_object (global_obj_p);
+    return false;
+  }
+
+  jerry_api_acquire_object (reg_func_p);
+  reg_value.type = JERRY_API_DATA_TYPE_OBJECT;
+  reg_value.u.v_object = reg_func_p;
+
+  bok = jerry_api_set_object_field_value (global_obj_p,
+                                          (jerry_api_char_t *) name,
+                                          &reg_value);
+
+  jerry_api_release_value (&reg_value);
+  jerry_api_release_object (reg_func_p);
+  jerry_api_release_object (global_obj_p);
+
+  if (!bok)
+  {
+    printf ("Error: register_native_function failed: [%s]\r\n", name);
+  }
+
+  return bok;
+}
+
+void js_register_functions (void)
+{
+  REGISTER_HANDLER (assert);
+  REGISTER_HANDLER (led);
+}
diff --git a/targets/mbedstm32f4/source/jerry_extapi.h b/targets/mbedstm32f4/source/jerry_extapi.h
new file mode 100644
index 0000000000..5359318b63
--- /dev/null
+++ b/targets/mbedstm32f4/source/jerry_extapi.h
@@ -0,0 +1,38 @@
+/* Copyright 2015 Samsung Electronics Co., Ltd.
+ *
+ * Licensed under the Apache License, Version 2.0 (the "License");
+ * you may not use this file except in compliance with the License.
+ * You may obtain a copy of the License at
+ *
+ *     http://www.apache.org/licenses/LICENSE-2.0
+ *
+ * Unless required by applicable law or agreed to in writing, software
+ * distributed under the License is distributed on an "AS IS" BASIS
+ * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+ * See the License for the specific language governing permissions and
+ * limitations under the License.
+ */
+
+#ifndef __JERRY_EXTAPI_H__
+#define __JERRY_EXTAPI_H__
+
+#define JERRY_STANDALONE_EXIT_CODE_OK   (0)
+#define JERRY_STANDALONE_EXIT_CODE_FAIL (1)
+
+#define API_DATA_IS_OBJECT(val_p) \
+    ((val_p)->type == JERRY_API_DATA_TYPE_OBJECT)
+
+#define API_DATA_IS_FUNCTION(val_p) \
+    (API_DATA_IS_OBJECT (val_p) && \
+     jerry_api_is_function ((val_p)->u.v_object))
+
+#define JS_VALUE_TO_NUMBER(val_p) \
+    ((val_p)->type == JERRY_API_DATA_TYPE_FLOAT32 ? \
+     (double) ((val_p)->u.v_float32) : \
+     (val_p)->type == JERRY_API_DATA_TYPE_FLOAT64 ? \
+       (double) ((val_p)->u.v_float64) : \
+       (double) ((val_p)->u.v_uint32))
+
+void js_register_functions (void);
+
+#endif
diff --git a/targets/mbedstm32f4/source/jerry_port.c b/targets/mbedstm32f4/source/jerry_port.c
new file mode 100644
index 0000000000..821d5f133f
--- /dev/null
+++ b/targets/mbedstm32f4/source/jerry_port.c
@@ -0,0 +1,55 @@
+/* Copyright 2014-2015 Samsung Electronics Co., Ltd.
+ *
+ * Licensed under the Apache License, Version 2.0 (the "License");
+ * you may not use this file except in compliance with the License.
+ * You may obtain a copy of the License at
+ *
+ *     http://www.apache.org/licenses/LICENSE-2.0
+ *
+ * Unless required by applicable law or agreed to in writing, software
+ * distributed under the License is distributed on an "AS IS" BASIS
+ * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+ * See the License for the specific language governing permissions and
+ * limitations under the License.
+ */
+
+#include <stdarg.h>
+
+#include "jerry-core/jerry.h"
+ 
+/**
+ * Provide log message to filestream implementation for the engine.
+ */
+int jerry_port_logmsg (FILE *stream, /**< stream pointer */
+                       const char *format, /**< format string */
+                       ...) /**< parameters */
+{
+  va_list args;
+  int count;
+  va_start (args, format);
+  count = vfprintf (stream, format, args);
+  va_end (args);
+  return count;
+} /* jerry_port_logmsg */
+
+/**
+ * Provide error message to console implementation for the engine.
+ */
+int jerry_port_errormsg (const char *format, /**< format string */
+                         ...) /**< parameters */
+{
+  va_list args;
+  int count;
+  va_start (args, format);
+  count = vfprintf (stderr, format, args);
+  va_end (args);
+  return count;
+} /* jerry_port_errormsg */
+
+/**
+ * Provide output character to console implementation for the engine.
+ */
+int jerry_port_putchar (int c) /**< character to put */
+{
+  return putchar ((unsigned char) c);
+} /* jerry_port_putchar */
diff --git a/targets/mbedstm32f4/source/jerry_run.cpp b/targets/mbedstm32f4/source/jerry_run.cpp
new file mode 100644
index 0000000000..a4fdee724a
--- /dev/null
+++ b/targets/mbedstm32f4/source/jerry_run.cpp
@@ -0,0 +1,125 @@
+/* Copyright 2014-2015 Samsung Electronics Co., Ltd.
+ *
+ * Licensed under the Apache License, Version 2.0 (the "License");
+ * you may not use this file except in compliance with the License.
+ * You may obtain a copy of the License at
+ *
+ *     http://www.apache.org/licenses/LICENSE-2.0
+ *
+ * Unless required by applicable law or agreed to in writing, software
+ * distributed under the License is distributed on an "AS IS" BASIS
+ * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+ * See the License for the specific language governing permissions and
+ * limitations under the License.
+ */
+
+#include "jerry-core/jerry.h"
+
+#include <stdlib.h>
+#include <stdio.h>
+
+#include "jerry_run.h"
+#include "jerry_extapi.h"
+
+static const char* fn_sys_loop_name = "sysloop";
+
+int js_entry (const char *source_p, const size_t source_size)
+{
+  const jerry_api_char_t *jerry_src = (const jerry_api_char_t *) source_p;
+  jerry_completion_code_t ret_code = JERRY_COMPLETION_CODE_OK;
+  jerry_flag_t flags = JERRY_FLAG_EMPTY;
+  jerry_api_object_t *err_obj_p = NULL;
+
+  jerry_init (flags);
+
+  js_register_functions ();
+
+  if (!jerry_parse (jerry_src, source_size, &err_obj_p))
+  {
+    printf ("Error: jerry_parse failed\r\n");
+    ret_code = JERRY_COMPLETION_CODE_UNHANDLED_EXCEPTION;
+    jerry_api_release_object (err_obj_p);
+  }
+  else
+  {
+    if ((flags & JERRY_FLAG_PARSE_ONLY) == 0)
+    {
+      ret_code = jerry_run (&err_obj_p);
+      if (err_obj_p != NULL)
+      {
+        jerry_api_release_object (err_obj_p);
+      }
+    }
+  }
+
+  return ret_code;
+}
+
+int js_eval (const char *source_p, const size_t source_size)
+{
+  jerry_completion_code_t status;
+  jerry_api_value_t res;
+
+  status = jerry_api_eval ((jerry_api_char_t *) source_p,
+                           source_size,
+                           false,
+                           false,
+                           &res);
+
+  jerry_api_release_value (&res);
+
+  return status;
+}
+
+int js_loop (uint32_t ticknow)
+{
+  jerry_api_object_t *global_obj_p;
+  jerry_api_value_t sysloop_func;
+  bool is_ok;
+
+  global_obj_p = jerry_api_get_global ();
+  is_ok = jerry_api_get_object_field_value (global_obj_p,
+                          (const jerry_api_char_t*) fn_sys_loop_name,
+                          &sysloop_func);
+  if (!is_ok)
+  {
+    printf ("Error: '%s' not defined!!!\r\n", fn_sys_loop_name);
+    jerry_api_release_object (global_obj_p);
+    return -1;
+  }
+
+  if (!API_DATA_IS_FUNCTION (&sysloop_func))
+  {
+    printf ("Error: '%s' is not a function!!!\r\n", fn_sys_loop_name);
+    jerry_api_release_value (&sysloop_func);
+    jerry_api_release_object (global_obj_p);
+    return -2;
+  }
+
+  jerry_api_value_t* val_args;
+  uint16_t val_argv;
+
+  val_argv = 1;
+  val_args = (jerry_api_value_t*) malloc (sizeof (jerry_api_value_t) * val_argv);
+  val_args[0].type = JERRY_API_DATA_TYPE_UINT32;
+  val_args[0].u.v_uint32 = ticknow;
+
+  jerry_api_value_t res;
+  is_ok = jerry_api_call_function (sysloop_func.u.v_object,
+                                   global_obj_p,
+                                   &res,
+                                   val_args,
+                                   val_argv);
+  jerry_api_release_value (&res);
+  free (val_args);
+
+  jerry_api_release_value (&sysloop_func);
+  jerry_api_release_object (global_obj_p);
+
+  return 0;
+}
+
+void js_exit (void)
+{
+  jerry_cleanup ();
+}
diff --git a/targets/mbedstm32f4/source/jerry_run.h b/targets/mbedstm32f4/source/jerry_run.h
new file mode 100644
index 0000000000..f595b0e9a5
--- /dev/null
+++ b/targets/mbedstm32f4/source/jerry_run.h
@@ -0,0 +1,24 @@
+/* Copyright 2015 Samsung Electronics Co., Ltd.
+ *
+ * Licensed under the Apache License, Version 2.0 (the "License");
+ * you may not use this file except in compliance with the License.
+ * You may obtain a copy of the License at
+ *
+ *     http://www.apache.org/licenses/LICENSE-2.0
+ *
+ * Unless required by applicable law or agreed to in writing, software
+ * distributed under the License is distributed on an "AS IS" BASIS
+ * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+ * See the License for the specific language governing permissions and
+ * limitations under the License.
+ */
+
+#ifndef __JERRY_RUN_H__
+#define __JERRY_RUN_H__
+
+int js_entry (const char *source_p, const size_t source_size);
+int js_eval (const char *source_p, const size_t source_size);
+int js_loop (uint32_t ticknow);
+void js_exit (void);
+
+#endif
diff --git a/targets/mbedstm32f4/source/main.cpp b/targets/mbedstm32f4/source/main.cpp
new file mode 100644
index 0000000000..86cf7f52bf
--- /dev/null
+++ b/targets/mbedstm32f4/source/main.cpp
@@ -0,0 +1,75 @@
+/* Copyright 2014-2015 Samsung Electronics Co., Ltd.
+ *
+ * Licensed under the Apache License, Version 2.0 (the "License");
+ * you may not use this file except in compliance with the License.
+ * You may obtain a copy of the License at
+ *
+ *     http://www.apache.org/licenses/LICENSE-2.0
+ *
+ * Unless required by applicable law or agreed to in writing, software
+ * distributed under the License is distributed on an "AS IS" BASIS
+ * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+ * See the License for the specific language governing permissions and
+ * limitations under the License.
+ */
+
+#include "mbed-drivers/mbed.h"
+
+#include "jerry-core/jerry.h"
+#include "jerry_run.h"
+
+//-----------------------------------------------------------------------------
+
+#include "jerry_targetjs.h"
+
+static int jerry_init (void)
+{
+  int retcode;
+  int src;
+
+  DECLARE_JS_CODES;
+
+  /* run main.js */
+  retcode = js_entry (js_codes[0].source, js_codes[0].length);
+  if (retcode != 0)
+  {
+    pc.printf ("js_entry failed code(%d) [%s]\r\n", retcode, js_codes[0].name);
+    js_exit ();
+    return -1;
+  }
+  /* run rest of the js files */
+  for (src = 1; js_codes[src].source; src++) {
+    retcode = js_eval (js_codes[src].source, js_codes[src].length);
+    if (retcode != 0)
+    {
+      pc.printf ("js_eval failed code(%d) [%s]\r\n", retcode, js_codes[src].name);
+      js_exit ();
+      return -2;
+    }
+  }
+  return 0;
+}
+
+static void jerry_loop (void)
+{
+  static uint32_t _jcount = 0;
+
+  js_loop (_jcount++);
+}
+
+
+void app_start (int, char**)
+{
+  // set 9600 baud rate for stdout
+  static Serial pc (USBTX, USBRX);
+  pc.baud (9600);
+
+  pc.printf ("\r\nJerryScript in mbed K64F\r\n");
+  pc.printf ("   build  %s\r\n", jerry_build_date);
+  pc.printf ("   hash   %s\r\n", jerry_commit_hash);
+  pc.printf ("   branch %s\r\n", jerry_branch_name);
+
+  if (jerry_init () == 0) {
+    minar::Scheduler::postCallback(jerry_loop).period(minar::milliseconds(100));
+  }
+}
diff --git a/targets/mbedstm32f4/source/makejerry.cmake b/targets/mbedstm32f4/source/makejerry.cmake
new file mode 100644
index 0000000000..90a9efe56a
--- /dev/null
+++ b/targets/mbedstm32f4/source/makejerry.cmake
@@ -0,0 +1,30 @@
+# Copyright 2015 Samsung Electronics Co., Ltd.
+#
+# Licensed under the Apache License, Version 2.0 (the "License");
+# you may not use this file except in compliance with the License.
+# You may obtain a copy of the License at
+#
+#     http://www.apache.org/licenses/LICENSE-2.0
+#
+# Unless required by applicable law or agreed to in writing, software
+# distributed under the License is distributed on an "AS IS" BASIS
+# WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+# See the License for the specific language governing permissions and
+# limitations under the License.
+
+# application name
+set(MBEDMODULE "jerry")
+
+# add include jerry-core
+set(LJCORE ${CMAKE_CURRENT_LIST_DIR}/../../../)
+include_directories(${LJCORE})
+
+# compile flags
+set(CMAKE_C_FLAGS "${CMAKE_C_FLAGS} -mlittle-endian -mthumb -mcpu=cortex-m4")
+
+# link jerryscript
+set(LJPATH ${CMAKE_CURRENT_LIST_DIR}/../libjerry)
+set(LJFILES "")
+set(LJFILES ${LJFILES} ${LJPATH}/libfdlibm.a)
+set(LJFILES ${LJFILES} ${LJPATH}/libjerrycore.a)
+target_link_libraries(${MBEDMODULE} ${LJFILES})
diff --git a/targets/mbedstm32f4/source/native_mbedstm32f4.cpp b/targets/mbedstm32f4/source/native_mbedstm32f4.cpp
new file mode 100644
index 0000000000..d7ed34dc4a
--- /dev/null
+++ b/targets/mbedstm32f4/source/native_mbedstm32f4.cpp
@@ -0,0 +1,25 @@
+/* Copyright 2014-2015 Samsung Electronics Co., Ltd.
+ *
+ * Licensed under the Apache License, Version 2.0 (the "License");
+ * you may not use this file except in compliance with the License.
+ * You may obtain a copy of the License at
+ *
+ *     http://www.apache.org/licenses/LICENSE-2.0
+ *
+ * Unless required by applicable law or agreed to in writing, software
+ * distributed under the License is distributed on an "AS IS" BASIS
+ * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+ * See the License for the specific language governing permissions and
+ * limitations under the License.
+ */
+
+#include "mbed-drivers/mbed.h"
+
+#include "native_mbedstm32f4.h"
+
+void native_led (int port, int val)
+{
+  static const PinName portmap[] = { LED1, LED2, LED3, LED4 };
+  DigitalOut led (portmap[port]);
+  led = val;
+}
diff --git a/targets/mbedstm32f4/source/native_mbedstm32f4.h b/targets/mbedstm32f4/source/native_mbedstm32f4.h
new file mode 100644
index 0000000000..c6ba6ad334
--- /dev/null
+++ b/targets/mbedstm32f4/source/native_mbedstm32f4.h
@@ -0,0 +1,21 @@
+/* Copyright 2014-2015 Samsung Electronics Co., Ltd.
+ *
+ * Licensed under the Apache License, Version 2.0 (the "License");
+ * you may not use this file except in compliance with the License.
+ * You may obtain a copy of the License at
+ *
+ *     http://www.apache.org/licenses/LICENSE-2.0
+ *
+ * Unless required by applicable law or agreed to in writing, software
+ * distributed under the License is distributed on an "AS IS" BASIS
+ * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+ * See the License for the specific language governing permissions and
+ * limitations under the License.
+ */
+
+#ifndef __NATIVE_MBEDSTM32F4_H__
+#define __NATIVE_MBEDSTM32F4_H__
+
+void native_led (int port, int val);
+
+#endif

From e3989f67819ea05b74f6e77dea9c49dffef491b9 Mon Sep 17 00:00:00 2001
From: Imre Kiss <kissi@inf.u-szeged.hu>
Date: Mon, 11 Apr 2016 13:52:41 +0200
Subject: [PATCH 2/3] Fix coding style in the JavaScript files.
 JerryScript-DCO-1.0-Signed-off-by: Imre Kiss kissi@inf.u-szeged.hu

---
 targets/mbedstm32f4/js/blink.js | 7 ++++---
 targets/mbedstm32f4/js/main.js  | 7 ++++---
 2 files changed, 8 insertions(+), 6 deletions(-)

diff --git a/targets/mbedstm32f4/js/blink.js b/targets/mbedstm32f4/js/blink.js
index 0e51261393..49d8f861eb 100644
--- a/targets/mbedstm32f4/js/blink.js
+++ b/targets/mbedstm32f4/js/blink.js
@@ -1,9 +1,10 @@
 var check = 1;
 
-function blink() {
+function blink ()
+{
   var blk = (check > 8) ? 1 : 0;
   led(1, blk);
-  check = (check >= 10) ? 1 : check+1;
+  check = (check >= 10) ? 1 : check + 1;
 }
 
-print("blink js OK");
+print ("blink js OK");
diff --git a/targets/mbedstm32f4/js/main.js b/targets/mbedstm32f4/js/main.js
index 7063198045..e9380ba7fb 100644
--- a/targets/mbedstm32f4/js/main.js
+++ b/targets/mbedstm32f4/js/main.js
@@ -1,5 +1,6 @@
-function sysloop(ticknow) {
-  blink();
+function sysloop (ticknow)
+{
+  blink ();
 }
 
-print("main js OK");
+print ("main js OK");

From c8764f0c689cc11750f44c60f5222ce754d6d140 Mon Sep 17 00:00:00 2001
From: Imre Kiss <kissi@inf.u-szeged.hu>
Date: Mon, 18 Apr 2016 09:42:17 +0200
Subject: [PATCH 3/3] Declare serial variable for communication.
 JerryScript-DCO-1.0-Signed-off-by: Imre Kiss kissi@inf.u-szeged.hu

---
 targets/mbedstm32f4/source/main.cpp | 3 ++-
 1 file changed, 2 insertions(+), 1 deletion(-)

diff --git a/targets/mbedstm32f4/source/main.cpp b/targets/mbedstm32f4/source/main.cpp
index 86cf7f52bf..1432d9f5cd 100644
--- a/targets/mbedstm32f4/source/main.cpp
+++ b/targets/mbedstm32f4/source/main.cpp
@@ -22,6 +22,8 @@
 
 #include "jerry_targetjs.h"
 
+static Serial pc (USBTX, USBRX); //TR, RX
+
 static int jerry_init (void)
 {
   int retcode;
@@ -61,7 +63,6 @@ static void jerry_loop (void)
 void app_start (int, char**)
 {
   // set 9600 baud rate for stdout
-  static Serial pc (USBTX, USBRX);
   pc.baud (9600);
 
   pc.printf ("\r\nJerryScript in mbed K64F\r\n");