STM32 Nucleo-U385RG-Q

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Support for the STM32 Nucleo-U385RG-Q

Tip

When using this board with RIOT, set the BOARD variable to nucleo-u385rg-q in your Makefile. If you follow the standard RIOT project structure, your Makefile should look like this:

./Makefile

# name of your application
APPLICATION = hello-world

# Change this to your board if you want to build for a different board
BOARD ?= nucleo-u385rg-q

# This has to be the absolute path to the RIOT base directory:
RIOTBASE ?= $(CURDIR)/RIOT

include $(RIOTBASE)/Makefile.include

Support for the STM32 Nucleo-U385RG-Q

Overview

The NUCLEO-U385RG-Q is a board from ST’s Nucleo-64 family supporting the STM32U385RG ultra-low-power microcontroller based on an ARM Cortex-M33 core with TrustZone, 256KiB of RAM, and 1MiB of Flash.

You can find general information about the Nucleo-64 boards on the boards_common_nucleo64 page.

This is the initial bring-up of the STM32U3 family and the Nucleo-U385RG-Q board: CPU and clock setup, GPIO, and the serial console (UART/LPUART).

Hardware

MCU

MCU	STM32U385RG
Family	ARM Cortex-M33
Vendor	STMicroelectronics
RAM	256KiB
Flash	1MiB
Frequency	up to 96MHz (currently clocked at 16MHz)
FPU	yes
TrustZone	yes
Datasheet	Datasheet
Reference Manual	Reference Manual
Programming Manual	Programming Manual
Board Manual	Board Manual

Flashing the Board

A detailed description of the flashing process can be found on the guides page.

The board name for the NUCLEO-U385RG-Q is nucleo-u385rg-q.

Note: OpenOCD does not yet support the STM32U3, so the default make BOARD=nucleo-u385rg-q flash (which uses OpenOCD) does not work for this board. Until OpenOCD support is available, build with make BOARD=nucleo-u385rg-q and flash the resulting ELF with the STM32CubeProgrammer CLI, e.g.: @code STM32_Programmer_CLI -c port=SWD -w bin/nucleo-u385rg-q/.elf -rst @endcode

Accessing RIOT shell

Default RIOT shell access uses the VCP (Virtual COM Port) over the USB interface provided by the on-board ST-LINK programmer. The ST-LINK is connected to the microcontroller’s USART1 (UART_DEV(0), STDIO).

The default baud rate is 115200.

If a physical connection to USART1 is needed, connect a UART interface to pins PA9 (USART1 TX) and PA10 (USART1 RX).