.. zephyr:board:: nucleo_l152re

Overview

The STM32 Nucleo-64 development board with STM32L152RE MCU, supports Arduino™ and ST morpho connectivity.

The STM32 Nucleo board provides an affordable, and flexible way for users to try out new concepts, and build prototypes with the STM32 microcontroller, choosing from the various combinations of performance, power consumption and features.

The Arduino Uno V3 connectivity support and the ST morpho headers allow easy functionality expansion of the STM32 Nucleo open development platform with a wide choice of specialized shields.

The STM32 Nucleo board integrates the ST-LINK/V2-1 debugger and programmer.

The STM32 Nucleo board comes with the STM32 comprehensive software HAL library together with various packaged software examples.

More information about the board can be found at the Nucleo L152RE website_.

Hardware

Nucleo L152RE provides the following hardware components:

STM32 microcontroller in QFP64 package
Two types of extension resources:
- Arduino Uno V3 connectivity
- ST morpho extension pin headers for full access to all STM32 I/Os
On-board ST-LINK/V2-1 debugger/programmer with SWD connector:
- Selection-mode switch to use the kit as a standalone ST-LINK/V2-1
Flexible board power supply:
- USB VBUS or external source (3.3V, 5V, 7 - 12V)
- Power management access point
Three LEDs:
- USB communication (LD1), user LED (LD2), power LED (LD3)
Two push-buttons: B1 (USER/blue) and B2 (RESET/black)
USB re-enumeration capability. Three different interfaces supported on USB:
- Virtual COM port
- Mass storage
- Debug port

More information about STM32L152RE can be found here:

STM32L152 reference manual_
STM32L152 data sheet_

Supported Features

.. zephyr:board-supported-hw::

Connections and IOs

Each of the GPIO pins can be configured by software as output (push-pull or open-drain), as input (with or without pull-up or pull-down), or as peripheral alternate function. Most of the GPIO pins are shared with digital or analog alternate functions. All GPIOs are high current capable except for analog inputs.

Board connectors:

.. image:: img/nucleo_l152re_connectors.jpg :align: center :alt: Nucleo L152RE connectors

Default Zephyr Peripheral Mapping:

UART_2 TX/RX : PA2/PA3 (ST-Link Virtual COM Port)
I2C1 SCL/SDA : PB8/PB9 (Arduino I2C)
B1 (USER/blue) : PC13
LD1 : PA5
DAC : PA4
PWM_3_CH1 : PA6

For more details please refer to STM32 Nucleo-64 board User Manual_.

Programming and Debugging

.. zephyr:board-supported-runners::

Nucleo L152RE board includes an ST-LINK/V2-1 embedded debug tool interface.

Applications for the nucleo_l152re board configuration can be built and flashed in the usual way (see :ref:build_an_application and :ref:application_run for more details).

Flashing

The board is configured to be flashed using west STM32CubeProgrammer_ runner, so its :ref:installation <stm32cubeprog-flash-host-tools> is required.

Alternatively, openocd can also be used to flash the board using the --runner (or -r) option:

.. code-block:: console

$ west flash --runner openocd

Flashing an application to Nucleo L152RE

Here is an example for the :zephyr:code-sample:blinky application.

.. zephyr-app-commands:: :zephyr-app: samples/basic/blinky :board: nucleo_l152re :goals: build flash

You will see the LED blinking every second.

Debugging

You can debug an application in the usual way. Here is an example for the :zephyr:code-sample:hello_world application.

.. zephyr-app-commands:: :zephyr-app: samples/hello_world :board: nucleo_l152re :maybe-skip-config: :goals: debug

References

.. target-notes::

.. _Nucleo L152RE website: https://www.st.com/en/evaluation-tools/nucleo-l152re.html

.. _STM32L152 reference manual: https://www.st.com/resource/en/reference_manual/cd00240193.pdf

.. _STM32L152 data sheet: https://www.st.com/resource/en/datasheet/stm32l152re.pdf

.. _STM32 Nucleo-64 board User Manual: https://www.st.com/resource/en/user_manual/dm00105823.pdf

.. _STM32CubeProgrammer: https://www.st.com/en/development-tools/stm32cubeprog.html