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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

Getting ready

The wiringPi library that we used previously for I2C also supports SPI. Ensure that wiringPi is installed (see Chapter 10, Sensing and Displaying Real-World Data, for details) so that we can use it here.

Next, we need to enable SPI if we didn't do so when we enabled I2C previously:

sudo nano /boot/config.txt  

Remove the # before #dtparam=spi=on to enable it, so it reads, and save (Ctrl + X, Y, Enter):

dtparam=spi=on  

You can confirm that the SPI is active by listing all the running modules using the following command and locating spi_bcm2835:

lsmod  

You can test the SPI with the following spiTest.py script:

#!/usr/bin/python3 # spiTest.py import wiringpi print("Add SPI Loopback - connect GPIO Pin19 and Pin21") print("[Press ...
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Publisher Resources

ISBN: 9781788629874Supplemental Content