STM32G071B Discovery

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 [1].

More information about STM32G071RB can be found here:

Supported Features

The stm32g071b_disco board supports the hardware features listed below.

on-chip / on-board
Feature integrated in the SoC / present on the board.
2 / 2
Number of instances that are enabled / disabled.
Click on the label to see the first instance of this feature in the board/SoC DTS files.
vnd,foo
Compatible string for the Devicetree binding matching the feature.
Click on the link to view the binding documentation.

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 [3].

Programming and Debugging

The stm32g071b_disco board supports the runners and associated west commands listed below.

flash debug

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 Building an Application and Run an Application for more details).

Flashing

The board is configured to be flashed using west STM32CubeProgrammer [5] runner, so its installation is required.

$ west flash

Flashing an application to the STM32G071B_DISCO

Here is an example for the Blinky application.

# From the root of the zephyr repository
west build -b stm32g071b_disco samples/basic/blinky
west 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 Hello World application.

# From the root of the zephyr repository
west build -b stm32g071b_disco samples/hello_world
west debug

References