README

About

This folder contains files to run JerryScript on FRDM-K64F board with Mbed OS. The document had been validated on Ubuntu 20.04 operating system.

1. Setup the build environment

Clone the necessary projects into a jerry-mbedos directory. The latest tested working version of Mbed is mbed-os-6.15.0.

mkdir jerry-mbedos && cd jerry-mbedos

git clone https://github.com/jerryscript-project/jerryscript.git
git clone https://github.com/ARMmbed/mbed-os.git -b mbed-os-6.15.0

The following directory structure has been created:

jerry-mbedos
  + jerryscript
  |  + targets
  |      + os
  |        + mbedos
  + mbed-os

2. Install dependencies of the projects

# Assuming you are in jerry-mbedos folder.
jerryscript/tools/apt-get-install-deps.sh

sudo apt install stlink-tools
pip install --user mbed-cli
# Install Python dependencies of Mbed OS.
pip install --user -r mbed-os/requirements.txt

3. Build Mbed OS (with JerryScript)

# Assuming you are in jerry-mbedos folder.
make -C jerryscript/targets/os/mbedos MBED_OS_DIR=${PWD}/mbed-os

The created binary is a mbedos.bin named file located in jerryscript/build/mbed-os folder.

4. Flash

Connect Micro-USB for charging and flashing the device.

# Assuming you are in jerry-mbedos folder.
make -C jerryscript/targets/os/mbedos MBED_OS_DIR=${PWD}/mbed-os flash

5. Connect to the device

The device should be visible as /dev/ttyACM0 on the host. You can use minicom communication program with 115200 baud rate.

sudo minicom --device=/dev/ttyACM0 --baud=115200

Set Add Carriage Ret option in minicom by CTRL-A -> Z -> U key combinations. Press RESET on the board to get the output of JerryScript application:

This test run the following script code: [print ('Hello, World!');]

Hello, World!