64.3. Universal asynchronous transceiver UART

64.3.1. Overview

uart The general asynchronous transceiver UART driver example project shows the configuration and use method of UART to realize the receiving and sending of serial port data.

In the example code, the UART serial port resources are initialized and configured, the serial port clock and the receiving and sending FIFO depth are set, and the interrupt is configured to realize the sending and receiving of serial port receipts.

64.3.2. Port Settings

Serial port baud rate is set to 115200bps, with one stop bit and no parity bit

64.3.3. Notice

when FIFO is enabled, echo is performed based on the set FIFO threshold.
When FIFO is disabled, echo one by one

64.3.4. Running the example

When the project runs correctly, manually input the string through the serial port, such as 12345678909876543210, and the serial port terminal will receive the following information:

uart driver example
fifo mode
uart will send back received characters, echo every 8 bytes, depends on the fifo threshold
12345678