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boards/st/stm32g071b_disco/doc/index.rst

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.. zephyr:board:: stm32g071b_disco

Overview

The STM32G071B-DISCO Discovery board is a demonstration and development platform for the STMicroelectronics Arm® Cortex®-M0+ core-based STM32G071RB USB Type-C® and Power Delivery microcontroller. The STM32G071B-DISCO Discovery board is presented with all necessary interfaces for easy connection and interoperability with other USB Type-C® devices. The STM32G071B-DISCO Discovery board is intended for discovery and display of USB Type-C® port characteristics such as data role, power role, VBUS and IBUS monitoring. It offers an advanced user mode when associated with the STM32CubeMonUCPD software GUI and can be used as a USB Type-C® and Power Delivery analyzer.

  • STM32G071RBT6 microcontroller featuring 128 Kbytes of Flash memory and 32 Kbytes of RAM in LQFP64 package

  • Plastic case

  • 1” 128 x 64 pixels OLED LCD module with SPI interface

  • USB Type-C® interface plug cable and receptacle connector accessible by door with reed sensor detection

  • 3 bidirectional current and power monitors with I2C interface to measure VBUS, CC1 and CC2 protected and isolated lines

  • On-board DC/DC converter to sustain power supply with VBUS varying from 3 V to 20 V (+/- 5 %)

  • 4 user status LEDs about USB Type-C® configuration

  • 3 LEDs for power and ST-LINK communication

  • 4-way joystick with selection button

  • 1 reset push-button

  • Board external connectors

    • USB Type-C® plug cable
    • USB Type-C® receptacle connector
    • 8-pin user extension connector including ADC, SPI, USART and I2C communication signals
    • USB with Micro-AB (ST-LINK)

  • Board internal connectors:

    • 2 x 8-pin GPIOs free pins from microcontroller (accessible internally when case is removed)
    • USB Type-C® test points for main signals

  • Flexible power-supply options: ST-LINK USB VBUS or USB Type-C® VBUS

  • On-board ST-LINK/V2-1 debugger/programmer with USB enumeration capability: mass storage, Virtual COM port and debug port

More information about the board can be found at the STM32G071B-DISCO website_.

More information about STM32G071RB can be found here:

  • G071RB on www.st.com_
  • STM32G071 reference manual_

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.

Default Zephyr Peripheral Mapping:

  • UART_3 TX/RX : PC10/PC11 (ST-Link Virtual Port Com)
  • UCPD1 : PA8/PB15
  • BUTTON (JOY_SEL) : PC0
  • BUTTON (JOY_LEFT) : PC1
  • BUTTON (JOY_DOWN) : PC2
  • BUTTON (JOY_RIGHT) : PC3
  • BUTTON (JOY_UP) : PC4
  • LED (TO_REC) : PD9
  • LED (TO_PLUG) : PD8
  • LED (SINK_SPY) : PD5
  • LED (SOURCE) : PC12
  • ENCC1 : PB10 (Enable CC1)
  • ENCC2 : PB11 (Enable CC2)
  • RDCC1 : PB12 (Enable Door Sense on CC1)

For more details please refer to STM32G0 Discovery board User Manual_.

Programming and Debugging

.. zephyr:board-supported-runners::

The STM32G071B Discovery board includes an ST-LINK/V2-1 embedded debug tool interface.

Applications for the stm32g071b_disco 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.

.. code-block:: console

$ west flash

Flashing an application to the STM32G071B_DISCO

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

.. zephyr-app-commands:: :zephyr-app: samples/basic/blinky :board: stm32g071b_disco :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: stm32g071b_disco :maybe-skip-config: :goals: debug

References

.. target-notes::

.. _STM32G071B-DISCO website: https://www.st.com/en/evaluation-tools/stm32g071b-disco.html

.. _STM32G071 reference manual: https://www.st.com/resource/en/reference_manual/dm00371828.pdf

.. _STM32G0 Discovery board User Manual: https://www.st.com/resource/en/user_manual/dm00496511.pdf

.. _G071RB on www.st.com: https://www.st.com/en/microcontrollers/stm32g071rb.html

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