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Raspberry Pi 3 Cookbook for Python Programmers - Third Edition
book

Raspberry Pi 3 Cookbook for Python Programmers - Third Edition

by Steven Lawrence Fernandes, Tim Cox
April 2018
Beginner content levelBeginner
552 pages
13h 58m
English
Packt Publishing
Content preview from Raspberry Pi 3 Cookbook for Python Programmers - Third Edition

Using SPI to control an LED matrix

In Chapter 10, Sensing and Displaying Real-World Data, we connected to devices using a bus protocol called I2C. Raspberry Pi also supports another chip-to-chip protocol called Serial Peripheral Interface (SPI). The SPI bus differs from I2C because it uses two single direction data lines (where I2C uses one bidirectional data line).

Although SPI requires more wires (I2C uses two bus signals, SDA and SCL), it supports the simultaneous sending and receiving of data and much higher clock speeds than I2C:

General connections of SPI devices with Raspberry Pi

The SPI bus consists of the following four signals:

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Publisher Resources

ISBN: 9781788629874Supplemental Content