Beginning STM32: Developing with FreeRTOS, libopencm3 and GCC

© Warren Gay 2018

Warren GayBeginning STM32https://doi.org/10.1007/978-1-4842-3624-6_7

7. USB Serial

Warren Gay¹ 

(1)

St. Catharines, Ontario, Canada

 

One of the nice things about the STM32 MCU is the availability of the USB (Universal Serial Bus) peripheral. With USB, it is possible to communicate directly with a desktop platform in various modes. One of these flexible modes is USB’s emulation of a serial link between the MCU and the desktop.

This chapter will explore the use of libopencm3 and FreeRTOS working together to provide a convenient means of communication. You will use the USB CDC class of operation (USB communication device class). This provides a very convenient means for interacting with your Blue Pill.

Blue Pill USB Issue

First, let’s clear ...