April 2018
Beginner
552 pages
13h 58m
English
book
Raspberry Pi 3 Cookbook for Python Programmers - Third Edition
by Steven Lawrence Fernandes, Tim Cox
Content preview from Raspberry Pi 3 Cookbook for Python Programmers - Third Edition
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Using devices with the I2C bus
Raspberry Pi can support several higher-level protocols that a wide range of devices can easily be connected to. In this chapter, we shall focus on the most common bus, called I-squared-C (I2C). It provides a medium-speed bus for communicating with devices over two wires. In this section, we shall use I2C to interface with an 8-bit ADC. This device will measure an analog signal, convert it to a relative value between 0 and 255, and send the value as a digital signal (represented by 8-bits) over the I2C bus to the Raspberry Pi.
The advantages of I2C can be summarized as follows:
- Maintains a low pin/signal count, even with numerous devices on the bus
- Adapts to the needs of different slave devices
- Readily supports ...
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