I am developing a program to enable the USART3 (initially as a UART) of the STM32H755 (NUCLEO-H755ZI-Q) and use it to transmit information through the functions "__io_putchar" and "printf" but it does not work. At first I thought it was an error in t...
I bought a NUCLEO H755ZI board, but I can't make the LED connected to GPIOB pin 14 blink, neither with CMSIS nor with HAL, I saw some tutorials and questions here, but nothing solved it, thank you in advance for your help.
There is a resistor R26 next to LD3, would that be it? Or is it necessary to configure it in some specific way? And the same happens with other LEDs (LD1 and LD2)
