ST Nucle H743ZI

This page discusses issues unique to NuttX configurations for the STMicro NUCLEO-H743ZI development board featuring the STM32H743ZI MCU. The STM32H743ZI is a 400MHz Cortex-M7 operation with 2MBytes Flash memory and 1MByte SRAM. The board features:

  • On-board ST-LINK/V2-1 for programming and debugging,

  • Mbed-enabled (

  • 3 user LEDs

  • Two pushbuttons (user and reset)

  • 32.768 kHz crystal oscillator

  • USB OTG FS with Micro-AB connectors

  • Ethernet connector compliant with IEEE-802.3-2002

  • Board connectors: - USB with Micro-AB - SWD - Ethernet RJ45 - ST Zio connector including Arduino Uno V3 - ST morpho

Refer to the website for further information about this board (search keyword: NUCLEO-H743ZI)

Serial Console

Many options are available for a serial console via the Morpho connector. Here two common serial console options are suggested:

  1. Arduino Serial Shield.

    If you are using a standard Arduino RS-232 shield with the serial interface with RX on pin D0 and TX on pin D1 from USART6:




    DO RX



    D1 TX



  2. Nucleo Virtual Console.

    The virtual console uses Serial Port 3 (USART3) with TX on PD8 and RX on PD9.

    VCOM Signal






    These signals are internally connected to the on board ST-Link.

    The Nucleo virtual console is the default serial console in all configurations unless otherwise stated in the description of the configuration.


Information Common to All Configurations

Each Nucleo-H743ZI configuration is maintained in a sub-directory and can be selected as follow:

tools/ [options] viewtool-stm32f107:<subdir>

Where options should specify the host build platform (-l for Linux, -c for Cygwin under Windows, etc.). Try ‘tools/ -h’ for the complete list of options.

Before starting the build, make sure that (1) your PATH environment variable includes the correct path to your toolchain, and (2) you have the correct toolchain selected in the configuration.

And then build NuttX by simply typing the following. At the conclusion of the make, the nuttx binary will reside in an ELF file called, simply, nuttx.:


The <subdir> that is provided above as an argument to the tools/ must be is one of the following.


  1. These configurations use the mconf-based configuration tool. To change any of these configurations using that tool, you should:

    1. Build and install the kconfig-mconf tool. See nuttx/README.txt see additional README.txt files in the NuttX tools repository.

    2. Execute ‘make menuconfig’ in nuttx/ in order to start the reconfiguration process.

  2. Unless stated otherwise, all configurations generate console output on the ST-Link VCOM, USART3.

  3. Unless otherwise stated, the configurations are setup for Linux by default:

    Build Setup:

    CONFIG_HOST_LINUX=y                     : Linux host operating system
  4. All of these configurations use the general arm-none-eabi toolchain for Linux That toolchain selection can easily be reconfigured using ‘make menuconfig’.

  5. These configurations all assume that you are loading code using something like the ST-Link v2 JTAG. None of these configurations are setup to use the DFU bootloader but should be easily reconfigured to use that bootloader if so desired.

Configuration Sub-directories


This configuration provides a basic NuttShell configuration (NSH) for the Nucleo-H743ZI. The default console is the VCOM on USART3.


This configuration provides a base implementation for mcuboot integration in nuttx.

mcuboot-loader: Nuttx app-based bootloader. mcuboot-app: Nuttx app with nsh as entrypoint.