ST Nucleo G0B1RE¶
Overview¶
The Nucleo G0B1RE board features an ARM Cortex-M0+ based STM32G0B1RE MCU with a wide range of connectivity support and configurations. Here are some highlights of the Nucleo G0B1RE board:
STM32 microcontroller in QFP64 package
Board connectors:
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:
5V_USB_STLK from ST-Link USB connector
VIN (7 - 12V) from ARDUINO connector or ST morpho connector
E5V from ST morpho connector
5V_USB_CHG from ST-LINK USB connector
3.3V on ARDUINO connector or ST morpho connector
Three LEDs: USB communication (LD1), user LED (LD4), power LED (LD3)
Two push-buttons: USER and RESET
32.768 kHz crystal oscillator
More information about the board can be found at the Nucleo G0B1RE website 1.
Hardware¶
Nucleo G0B1RE provides the following hardware components:
STM32G0B1RE in LQFP64 package
ARM 32-bit Cortex-M0+ CPU
64 MHz max CPU frequency
Voltage range from 1.7 V to 3.6 V
512 KB Flash
144 kB SRAM
32-bit timers(1)
16-bit timers(11)
watchdogs(2)
systick(1)
Calendar RTC with alarm and periodic wakeup
I2C(3)
USART(6)
LPUART(2)
32 Mbit/s SPI(3) multiplexed with I2S(2)
HDMI_CEC(1)
USB 2.0 FS device (crystal-less) and host controller(1)
USB Type-C Power Delivery controller
CAN-FD(2)
GPIO (up to 94) with external interrupt capability
Tamper Pins(3)
12-bit ADC with 16 channels
12-bit DAC with 2 channels(2)
Analog Comperator(3)
12-channel DMA
More information about STM32G0B1RE can be found here:
Supported Features¶
The Zephyr nucleo_g0b1re 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 |
COUNTER |
on-chip |
rtc |
WATCHDOG |
on-chip |
independent watchdog |
PWM |
on-chip |
pwm |
ADC |
on-chip |
adc |
DAC |
on-chip |
dac |
Other hardware features are not yet supported in this Zephyr port.
The default configuration can be found in the defconfig file:
boards/arm/nucleo_g0b1re/nucleo_g0b1re_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_g0b1re board configuration can be built and
flashed in the usual way (see Building an Application and
Run an Application for more details).
Flashing¶
Nucleo G0B1RE board includes an ST-LINK/V2-1 embedded debug tool interface.
This interface is not yet supported by the openocd version included in the Zephyr SDK. But JLink, STM32CubeProgrammer and Pyocd interfaces are supported. Pyocd support is currently limited: As the stm32g0b1 target causes issues, the stm32g071 target is used. For STM32G0 support pyocd needs additional target information, which can be installed by adding “pack” support with the following pyocd command:
$ pyocd pack --update
$ pyocd pack --install stm32g0
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_g0b1re samples/hello_world
west debug