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Need help! Nucleo STM32F401 board. UART communication

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Hello, guys.

I really need your help! I just started working with Keil RTX RTOS. I have worked with 8 bit AVR microcontrollers before and I understood it pretty god I would say.. Now, I am lost with 32 bit microcontrollers and Keil RTX real time operation system.

the first project that I want to do is: Use UART to send "HELLO" to the terminal.

where should I start?
how to I initialise uart?
do I need any external hardware?

please help me!!

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