Local Bus Interfaces
The communication between an embedded system and other systems in its vicinity is enabled by a few protocols. Most microcontrollers designed for embedded systems support the most common interfaces that control and discipline the access to serial lines. Some of these protocols are so popular that they have become the standard for wired inter-chip communication among microcontrollers, and for controlling electronic devices, such as sensors, actuators, displays, wireless transceivers, and many other peripherals. This chapter describes how these protocols work, specifically focusing on the implementation of the system software, through examples running on the reference platform. In particular, we will cover the following topics in this chapter:
- Introducing serial communication
- A UART-based asynchronous serial bus
- An SPI bus
- An I2C bus
By the end of this chapter, you will learn how to integrate the common serial communication protocols.
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