Beginning STM32: Developing with FreeRTOS, libopencm3 and GCC

© Warren Gay 2018

Warren GayBeginning STM32https://doi.org/10.1007/978-1-4842-3624-6_6

6. USART

Warren Gay¹ 

(1)

St. Catharines, Ontario, Canada

 

The Blue Pill PCB provides one GPIO-controlled LED to communicate by. Needless to say, this would be limiting if it were all you had. Perhaps the best early-development peripheral to pursue for communication is the USART (Universal Synchronous/Asynchronous Receiver/Transmitter).

This chapter will examine how to coax a STM32 USART to speak to your desktop through a USB serial adapter cable. A second project will demonstrate the same USART using two FreeRTOS tasks and a message queue.

USART/UART Peripheral

Within this book and technical literature at large, you will see the terms USART and UART used almost interchangeably. ...