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UART Example

Introduction

This example is a cross-loopback test program for UART2 and UART3, covering multiple baud rates, parity, stop bits, polling, buffers, and stress tests.

Source location: src/rtsmart/examples/peripheral/uart/test_uart.c

Example Behavior

• Fixed pin mapping:

  • UART2: TX=11, RX=12

  • UART3: TX=50, RX=51

• Automatically configures multiple groups of parameters for batch testing (baud rate/parity/stop bits)

• Performs basic send/receive, poll, recv_available, configuration read/write, and random stress tests

• Summarizes pass/fail results for each configuration group

Key Interfaces

• drv_uart_inst_create() / drv_uart_inst_destroy()

• drv_uart_set_config() / drv_uart_get_config()

• drv_uart_write() / drv_uart_read()

• drv_uart_poll() / drv_uart_recv_available()

• drv_uart_configure_buffer_size()

• drv_fpioa_set_pin_func()

Build and Run

cd src/rtsmart/examples/peripheral/uart
make
./test_uart

This example has no command-line arguments.

Tip

For UART interface details, please refer to UART API Documentation.