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Roland Takacs c51b268276
Minimize mbedos5 target (#4905) 
* Removed hardware specific implementations
  * Added simple 'hello world' demo code to be aligned to other targets
  * Added ability to use external resources from outside JerryScript folder

JerryScript-DCO-1.0-Signed-off-by: Roland Takacs roland.takacs@h-lab.eu
2021-12-15 12:52:40 +01:00
..
.gitignore
Minimize mbedos5 target (#4905)
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.mbedignore
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jerry-main.cpp
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jerry-port.cpp
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Makefile
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Makefile.travis
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README.md
Minimize mbedos5 target (#4905)
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README.md

About

This folder contains files to run JerryScript on STM32F4-Discovery board with Mbed OS 5. 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 5.15.

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-5.15

The following directory structure has been created:

jerry-mbedos
  + jerryscript
  |  + targets
  |      + os
  |        + mbedos5
  + 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 mbed-cli
# Install Python dependencies of Mbed OS.
pip install --user -r mbed-os/requirements.txt

4. Build Mbed OS (with JerryScript)

# Assuming you are in jerry-mbedos folder.
make -C jerryscript/targets/os/mbedos5 MBED_OS_DIR=${PWD}/mbed-os

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

5. Flash

Connect Mini-USB for charging and flashing the device.

# Assuming you are in jerry-riot folder.
sudo st-flash write jerryscript/build/mbed-os/mbed-os.bin 0x8000000

6. Connect to the device

Use USB To TTL Serial Converter for serial communication. STM32F4-Discovery pins are mapped by Mbed OS as follows:

  STM32f4-Discovery PA2 pin is configured for TX.
  STM32f4-Discovery PA3 pin is configured for RX.
  • Connect STM32f4-Discovery PA2 pin to RX pin of USB To TTL Serial Converter
  • Connect STM32f4-Discovery PA3 pin to TX pin of USB To TTL Serial Converter
  • Connect STM32f4-Discovery GND pin to GND pin of USB To TTL Serial Converter

The device should be visible as /dev/ttyUSB0. Use minicom communication program with 115200.

  • In minicom, set Add Carriage Ret to off in by CTRL-A -> Z -> U key combinations.
  • In minicom, set Hardware Flow Control to no by CTRL-A -> Z -> O -> Serial port setup -> F key combinations.
sudo minicom --device=/dev/ttyUSB0 --baud=115200

Press RESET on the board to get the output of JerryScript application:

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

Hello, World!