Summary

This chapter has given us the necessary information to start programming system support for the most popular local bus communication interfaces available on embedded targets. Accessing peripherals and other microcontrollers in the same geographical location is one of the typical requirements of embedded systems interacting with sensors, actuators, and other devices in proximity of the embedded system.

Several implementations providing a higher level of abstraction to the transceivers analyzed here already exist. The serial communication protocols covered in this chapter, namely UART, SPI, and I2C, are usually accessible through drivers that are part of the board support kit and do not need to be reimplemented from scratch. This chapter, however, purposely focused on studying the behavior of the components from the closest possible point of view, to better understand the interface provided by the hardware manufacturer, and possibly provide the tools to design new ways of...