ST Nucleo G071RB

Overview

The Nucleo G071RB board features an ARM Cortex-M0+ based STM32G071RB MCU with a wide range of connectivity support and configurations. Here are some highlights of the Nucleo G071RB board:

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
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 (LD4), power LED (LD3)
Two push-buttons: USER and RESET

More information about the board can be found at the Nucleo G071RB website [1].

Hardware

Nucleo G071RB provides the following hardware components:

STM32 microcontroller in LQFP64 package
Two types of extension resources:
- Arduino* Uno V3 connectivity
- ST morpho extension pin headers for full access to all STM32 I/Os
ARM* mbed*
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 (LD4), power LED (LD3)
Two push-buttons: USER and RESET
USB re-enumeration capability. Three different interfaces supported on USB:
- Virtual COM port
- Mass storage
- Debug port
Support of wide choice of Integrated Development Environments (IDEs) including:
- IAR
- ARM Keil
- GCC-based IDEs

More information about STM32G071RB can be found here:

Supported Features

The Zephyr nucleo_g071rb board configuration supports the following hardware features:

Interface	Controller	Driver/Component
MPU	on-chip	arm memory protection unit
NVIC	on-chip	nested vector interrupt controller
UART	on-chip	serial port-polling; serial port-interrupt
PINMUX	on-chip	pinmux
GPIO	on-chip	gpio
I2C	on-chip	i2c
SPI	on-chip	spi
CLOCK	on-chip	reset and clock control
FLASH	on-chip	flash memory
COUNTER	on-chip	rtc
WATCHDOG	on-chip	independent watchdog
PWM	on-chip	pwm
ADC	on-chip	adc
DAC	on-chip	dac
die-temp	on-chip	die temperature sensor

Other hardware features are not yet supported in this Zephyr port.

The default configuration can be found in the defconfig file: boards/arm/nucleo_g071rb/nucleo_g071rb_defconfig

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_1 TX/RX : PC4/PC5
UART_2 TX/RX : PA2/PA3 (ST-Link Virtual Port Com)
I2C1 SCL/SDA : PB8/PB9 (Arduino I2C)
I2C2 SCL/SDA : PA11/PA12
SPI1 NSS/SCK/MISO/MOSI : PB0/PA5/PA6/PA7 (Arduino SPI)
SPI2 NSS/SCK/MISO/MOSI : PB12/PB13/PB14/PB15
USER_PB : PC13
LD4 : PA5
PWM : PA6
ADC1 IN0 : PA0
ADC1 IN1 : PA1
DAC1_OUT1 : PA4

For mode details please refer to STM32 Nucleo-64 board User Manual [3].

Programming and Debugging

Applications for the nucleo_g071rb board configuration can be built and flashed in the usual way (see Building an Application and Run an Application for more details).

Flashing

Nucleo G071RB board includes an ST-LINK/V3 embedded debug tool interface.

Flashing an application to Nucleo G071RB

Here is an example for the Blinky application.

# From the root of the zephyr repository
west build -b nucleo_g071rb 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 nucleo_g071rb samples/hello_world
west debug