The board support package for the STM NUCLEO-H743ZI Board is restricted to the Arduino UNO pin header and the onboard LEDs and switch (push button). The STM32H743 has much more capabilities then 16 digital I/O pins, 6 analog input pins, UART, SPI, and I2C interfaces. But if you want to use the more advanced features you can use the CubeMX to create source code for the internal peripherals. This project wants to show how to use the Cube Ecosystem for a Forth system (or vice versa) and can't implement all features and possibilities the STM32H743 has. It is a good starting point for your project.

• Forth as CMSIS-RTOS thread. CMSIS-RTOS API to use FreeRTOS from Forth.
• Buffered terminal I/O (5 KiB buffer for UART Rx). Interrupt driven and RTOS aware, key and emit block the calling thread.
  • USART1: D0 RX, D1 TX