7.7. The USART driver

This library is an implementation of the STM32F4 U(S)ART hardware devices.

It provide a light abstraction for all the SoC U(S)ART devices in order to map and manipulate a serial interface in a userspace task.

Table of Contents

• 7.7.1. About the USART principle
  • 7.7.1.1. Principles
• 7.7.2. The drvUsart API
  • 7.7.2.1. Initializing the USART driver
  • 7.7.2.2. Mapping and unmapping the USART device
  • 7.7.2.3. Enabling and disabling a device
  • 7.7.2.4. Writing and reading from usart
• 7.7.3. FAQ
  • 7.7.3.1. Can I declare multiple U(S)ART devices in the same time ?
  • 7.7.3.2. In voluntary mode where only my ISR handle the device, should I keep (un)mapping the device ?