bspUart Driver

Overview

The bspUart module provides a polling-mode UART driver for debug console output on STM32 targets. It is used by the logger subsystem and the command shell for human-readable output over the ST-LINK Virtual COM Port (VCP). The driver is the bsp::Uart class and satisfies the UartConcept compile-time interface check (BSP_UART_CONCEPT_CHECKER).

All I/O is synchronous polling; no DMA or interrupts are used, which avoids NVIC configuration dependencies at the cost of blocking the caller during transmission.

Configuration

Each UART instance is described by a UartConfig struct in a compile-time table (_uartConfigs[]): USART peripheral, GPIO port and TX/RX pins, alternate function number, and baud rate register value (typically 115200 baud for the debug console).

Board configuration:

• NUCLEO-F413ZH – USART3 on PD8 (TX) / PD9 (RX), AF7. VCP via ST-LINK V2-1.

• NUCLEO-G474RE – USART2 on PA2 (TX) / PA3 (RX), AF7. VCP via ST-LINK V3.