Arduino Core for STM32L4 based boards

Supported boards

Tlera Corp

• Dragonfly-STM32L476RE
• Butterfly-STM32L433CC
• Ladybug-STM32L432KC

STMicroelectronics

• NUCLEO-L432
• NUCLEO-L476

Installing

Board Manager

1. Download and install the Arduino IDE (at least version v1.6.8)
2. Start the Arduino IDE
3. Go into Preferences
4. Add https://grumpyoldpizza.github.io/arduino-STM32L4/package_STM32L4_boards_index.json as an "Additional Board Manager URL"
5. Open the Boards Manager from the Tools -> Board menu and install "STM32L4 Boards by Tlera Corp"
6. Select your STM32L4 board from the Tools -> Board menu

OS Specific Setup

Linux

1. Go to ~/.arduino15/packages/grumpyoldpizza/hardware/stm32l4/<VERSION>/drivers/linux/
2. sudo cp *.rules /etc/udev/rules.d
3. reboot

Windows

STM32 BOOTLOADER driver setup for Tlera Corp boards

1. Download Zadig
2. Plugin STM32L4 board and toggle the RESET button while holding down the BOOT button
3. Let Windows finish searching for drivers
4. Start Zadig
5. Select Options -> List All Devices
6. Select STM32 BOOTLOADER from the device dropdown
7. Select WinUSB (v6.1.7600.16385) as new driver
8. Click Replace Driver

USB Serial driver setup for Tlera Corp boards (Window XP / Windows 7 only)

1. Go to ~/AppData/Local/Arduino15/packages/grumpypoldpizza/hardware/stm32l4/<VERSION>/drivers/windows
2. Right-click on dpinst_x86.exe (32 bit Windows) or dpinst_amd64.exe (64 bit Windows) and select Run as administrator
3. Click on Install this driver software anyway at the Windows Security popup as the driver is unsigned

ST-LINK V2.1 driver setup for NUCLEO boards

1. Plugin NUCLEO board
2. Download and install ST-Link USB Drivers

Flashing the bootloader sketch for Tlera Corp Boards

The Tlera Corp boards require an initial bootloader sketch. This is nothing more than a default program that contains the USB Serial device

1. Plugin STM32L4 board and toggle the RESET button while holding down the BOOT button
2. Select Tools -> Programmer -> STM32 BOOTLOADER
3. Select Tools -> Burn Bootloader

From git (for core development)

1. Follow steps from Board Manager section above
2. cd <SKETCHBOOK>, where <SKETCHBOOK> is your Arduino Sketch folder:

• OS X: ~/Documents/Arduino
• Linux: ~/Arduino
• Windows: ~/Documents/Arduino

3. Create a folder named hardware, if it does not exist, and change directories to it
4. Clone this repo: git clone https://github.com/grumpyoldpizza/arduino-STM32L4.git grumpyoldpizza/stm32l4
5. Restart the Arduino IDE

Credits

This core is based on the Arduino SAMD Core