Nucleo H503RB
Overview
The Nucleo-H503RB board features an ARM® Cortex®-M33 core-based STM32H503RBT6 microcontroller with a wide range of connectivity support and configurations. Here are some highlights of the Nucleo-H503RB board:
STM32H503RB microcontroller featuring 128 Kbytes of Flash memory and 32 Kbytes of SRAM in LQFP64 package
Board connectors:
User USB Type-C®
MIPI10 for debugging (SWD/JTAG)
Arduino® Uno V3 connectivity (CN5, CN6, CN8, CN9)
ST morpho extension connector (CN7, CN10)
Flexible board power supply:
ST-LINK USB VBUS
user USB connector
external sources
On-board ST-LINK/V3EC debugger/programmer:
mass storage
Virtual COM port
debug port
One user LED shared with ARDUINO® Uno V3
Two push-buttons: USER and RESET
32.768 kHz crystal oscillator
24 MHz HSE crystal oscillator
More information about the board can be found at the NUCLEO_H503RB website.
Hardware
The STM32H503xx devices are a high-performance microcontrollers family (STM32H5 series) based on the high-performance Arm® Cortex®-M33 32-bit RISC core. They operate at a frequency of up to 250 MHz.
Core: Arm® Cortex®-M33 CPU with FPU, MPU, 375 DMIPS (Dhrystone 2.1), and DSP instructions
ART Accelerator
Memories
128 Kbytes of embedded flash memory with ECC, two banks of read-while-write
2-Kbyte OTP (one-time programmable)
32-Kbyte SRAM with ECC
2 Kbytes of backup SRAM (available in the lowest power modes)
Clock management
Internal oscillators: 64 MHz HSI, 48 MHz HSI48, 4 MHz CSI, 32 kHz LSI
Two PLLs for system clock, USB, audio, and ADC
External oscillators: 4 to 50 MHz HSE, 32.768 kHz LSE
Embedded regulator (LDO)
Up to 49 fast I/Os (most 5 V tolerant), up to 9 I/Os with independent supply down to 1.08 V
Analog peripherals
1x 12-bit ADC with up to 2.5 MSPS
1x 12-bit dual-channel DAC
1x ultra-low-power comparator
1x operational amplifier (7 MHz bandwidth)
1x Digital temperature sensor
Up to 11 timers - 4x 16-bit - 1x 32-bit - 2x 16-bit low-power 16-bit timers (available in Stop mode) - 2x watchdogs - 1x SysTick timer - RTC with HW calendar, alarms and calibration
Up to 16x communication interfaces
Up to 2x I2Cs FM + interfaces (SMBus/PMBus®)
Up to 2x I3Cs shared with I2C
Up to 3x USARTs (ISO7816 interface, LIN, IrDA, modem control)
1x LPUART
Up to 3x SPIs including three muxed with full-duplex I2S
Up to 3x additional SPI from 3x USART when configured in synchronous mode
1x FDCAN
1x USB 2.0 full-speed host and device
Two DMA controllers to offload the CPU
Security
HASH (SHA-1, SHA-2), HMAC
True random generator
96-bit unique ID
Active tamper
Development support: serial wire debug (SWD) and JTAG interfaces
More information about STM32H533RE can be found here:
Supported Features
The Zephyr nucleo_h503rb board configuration supports the following hardware features:
Interface |
Controller |
Driver/Component |
|---|---|---|
CLOCK |
on-chip |
reset and clock control |
GPIO |
on-chip |
gpio |
I2C |
on-chip |
i2c bus |
NVIC |
on-chip |
nested vector interrupt controller |
PINMUX |
on-chip |
pinmux |
RNG |
on-chip |
True Random number generator |
BKP SRAM |
on-chip |
Backup SRAM |
UART |
on-chip |
serial port-polling; serial port-interrupt |
WATCHDOG |
on-chip |
independent watchdog |
Other hardware features are not yet supported on this Zephyr port.
The default configuration can be found in the defconfig and dts files:
Connections and IOs
Nucleo-H503RB board has 8 GPIO controllers. These controllers are responsible for pin muxing, input/output, pull-up, etc.
For more details please refer to STM32H5 Nucleo-64 board User Manual.
Default Zephyr Peripheral Mapping:
USART1 TX/RX : PB14/PB15 (Arduino USART1)
SPI1 SCK/MISO/MOSI/NSS: PA5/PA6/PA7/PC9
USART3 TX/RX : PA3/PA4 (VCP)
USER_PB : PC13
User LED (green): PA5
System Clock
Nucleo H533RE System Clock could be driven by internal or external oscillator, as well as main PLL clock. By default System clock is driven by PLL clock at 240 MHz, driven by an 24 MHz high-speed external clock.
Serial Port
Nucleo H533RE board has up to 3 U(S)ARTs. The Zephyr console output is assigned to USART3. Default settings are 115200 8N1.
Backup SRAM
In order to test backup SRAM, you may want to disconnect VBAT from VDD_MCU.
You can do it by removing SB38 jumper on the back side of the board.
VBAT can be provided via the left ST Morpho connector’s pin 33.
Programming and Debugging
Nucleo-H503RB board includes an ST-LINK/V3EC embedded debug tool interface. This probe allows to flash the board using various tools.
Applications for the nucleo_h503rb board can be built and
flashed in the usual way (see Building an Application and
Run an Application for more details).
OpenOCD Support
For now, openocd support for stm32h5 is not available on upstream OpenOCD. You can check OpenOCD official Github mirror. In order to use it though, you should clone from the cutomized STMicroelectronics OpenOCD Github and compile it following usual README guidelines. Once it is done, you can set the OPENOCD and OPENOCD_DEFAULT_PATH variables in boards/st/nucleo_h563zi/board.cmake to point the build to the paths of the OpenOCD binary and its scripts, before including the common openocd.board.cmake file:
set(OPENOCD "<path_to_openocd_repo>/src/openocd" CACHE FILEPATH "" FORCE) set(OPENOCD_DEFAULT_PATH <path_to_opneocd_repo>/tcl) include(${ZEPHYR_BASE}/boards/common/openocd.board.cmake)
Flashing
The board is configured to be flashed using west STM32CubeProgrammer runner, so its installation is required.
Alternatively, OpencOCD or pyOCD can also be used to flash the board using
the --runner (or -r) option:
$ west flash --runner openocd
$ west flash --runner pyocd
For pyOCD, additional target information needs to be installed which can be done by executing the following commands:
$ pyocd pack --update
$ pyocd pack --install stm32h5
Flashing an application to Nucleo-H503RB
Connect the Nucleo-H503RB to your host computer using the USB port. Then build and flash an application. Here is an example for the Hello World application.
Run a serial host program to connect with your Nucleo board:
$ minicom -D /dev/ttyACM0
Then build and flash the application.
# From the root of the zephyr repository
west build -b nucleo_h503rb samples/hello_world
west flash
You should see the following message on the console:
Hello World! nucleo_h503rb/stm32h503xx
Debugging
You can debug an application in the usual way. Here is an example for the Blinky application.
# From the root of the zephyr repository
west build -b nucleo_h503rb samples/basic/blinky
west debug