IoT & Hardware
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You're reading from  Robotics at Home with Raspberry Pi Pico

Product typeBook
Published inMar 2023
Reading LevelBeginner
PublisherPackt
ISBN-139781803246079
Edition1st Edition
Languages
Python
Tools
Raspberry PiRaspberry Pi
Concepts
Robotics
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Author (1)
Danny Staple
Danny Staple
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Danny Staple

Danny Staple builds robots and gadgets as a hobbyist, makes videos about his work with robots, and attends community events such as PiWars and Arduino Day. He has been a professional Python programmer, later moving into DevOps, since 2009, and a software engineer since 2000. He has worked with embedded systems, including embedded Linux systems, throughout the majority of his career. He has been a mentor at a local CoderDojo, where he taught how to code with Python. He has run Lego Robotics clubs with Mindstorms. He has also developed Bounce!, a visual programming language targeted at teaching code using the NodeMCU IoT platform. The robots he has built with his children include TankBot, SkittleBot (now the Pi Wars robot), ArmBot, and SpiderBot.
Read more about Danny Staple

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Programming Raspberry Pi Pico PIO

We saw the PIO system back in Chapter 1. We could read encoders in Python on the Pico central cores; however, we can make monitoring the encoders the responsibility of PIO, letting those central cores do other things. The PIO system can read and decode the Gray code emitted by the encoders. This section will show how to program PIO in assembler and load the programs with CircuitPython.

Introduction to PIO programming

As we saw in Chapter 1, Pico has two PIO devices, each with four state machines. We program PIO in assembly language. Instructions command PIO to perform operations such as manipulating IO pins, registers, and first in first out (FIFO) queues. The following diagram is a simplified representation of a state machine:

Figure 6.5 – The Raspberry Pi Pico PIO state machines

The preceding diagram shows Raspberry Pi Pico PIO state machines, highlighting registers and other features. It shows the two PIO devices...

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Robotics at Home with Raspberry Pi Pico
Published in: Mar 2023Publisher: PacktISBN-13: 9781803246079
© 2023 Packt Publishing Limited All Rights Reserved

Author (1)

author image
Danny Staple

Danny Staple builds robots and gadgets as a hobbyist, makes videos about his work with robots, and attends community events such as PiWars and Arduino Day. He has been a professional Python programmer, later moving into DevOps, since 2009, and a software engineer since 2000. He has worked with embedded systems, including embedded Linux systems, throughout the majority of his career. He has been a mentor at a local CoderDojo, where he taught how to code with Python. He has run Lego Robotics clubs with Mindstorms. He has also developed Bounce!, a visual programming language targeted at teaching code using the NodeMCU IoT platform. The robots he has built with his children include TankBot, SkittleBot (now the Pi Wars robot), ArmBot, and SpiderBot.
Read more about Danny Staple

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