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USART2 Serial (ST-Link VCP)

An original CC0 bare-metal STM32F411RE program. It enables GPIOA and USART2 in RCC, configures PA2 as the USART2_TX alternate function (AF7), sets the baud-rate register and enables the transmitter (CR1.UE/TE), then prints "Hello from the STM32 Nucleo-F411RE!" followed by an incrementing four-digit counter (hand-written decimal add, no libc, no division) — waiting on SR.TXE / SR.TC for each byte — while blinking LD2 (PA5). USART2 is the ST-Link virtual COM port on a real Nucleo.

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Format: STM32F411RE flash image (bare-metal, compiled C)  ·  By: emulators.org  ·  Licence: Public domain (CC0)