SPI Example
SPI is a high-speed synchronous serial communication peripheral that supports master-slave mode data transmission. It has configurable clock polarity and phase characteristics, so there are four working modes. It can adopt various wiring methods according to application needs (such as the common 4-wire full-duplex mode, or the 3-wire half-duplex mode that saves pins), and realize data interaction with sensors, memory, displays, and peripheral controllers. This document is based on the SPI peripheral example provided by the official ESP-IDF, and introduces the general configuration process and function implementation methods, providing guidance for further learning and reference to the basic documentation.
For ease of understanding and use, the content of the document is divided into two parts:
General Steps Document: Summarizes the basic usage process of the SPI peripheral (such as initialization, configuration, startup, etc.), and provides a unified step description and API reference.
Example Document: Explains the implementation of each example by function, the common part avoids repetition by referencing the general steps document, and only retains the logic and parameter settings unique to the example.
This layered structure facilitates understanding the relevant basic knowledge and overall process in the general steps document first, and then learning the implementation details of specific functions in the example document, thereby understanding the working principle and program design method of the SPI peripheral more efficiently.