I'm trying the tutorial on UART (https://wiki.st.com/stm32mcu/wiki/STM32StepByStep:Step3_Introduction_to_the_UART) with an STM32MP157F-DK2 board.I tried defining the USART2 GPIOs with CubeMX as found in the reference document UM2637: DP5 - TX, PD6 - ...