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BBC Micro:bit in Practice

BBC Micro:bit in Practice

By : Ashwin Pajankar, Abhishek Sharma, Sandeep Saini
5 (1)
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BBC Micro:bit in Practice

BBC Micro:bit in Practice

5 (1)
By: Ashwin Pajankar, Abhishek Sharma, Sandeep Saini

Overview of this book

This book is a one-stop guide for learning BBC Micro:bit with MicroPython, exploring many hardware components and programming techniques to provide detailed insights into developing practical applications with the Micro:bit. It will also show you how hardware components can be manipulated using a combination of Micro:bit and MicroPython for developing practical projects. BBC Micro:bit in Practice will help you gain a holistic understanding of the BBC Micro:bit platform and MicroPython programming, guiding you through mini projects aimed at developing practical knowledge of circuit design and writing programs. You’ll learn how to write programs for working with built-in LEDs and buttons, interfacing external LEDs, buttons, motors, buzzers, and much more. You’ll also work with built-in radio, speakers, accelerometer, and a compass. You’ll dive into concepts related to the Micro:bit filesystem, interfacing external displays, and working with libraries in detail before exploring sewable circuits and wearable technology. After reading this Micro:bit book, you’ll understand how to apply principles in electronics and MicroPython to create interesting real-life projects from scratch.
Table of Contents (22 chapters)
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1
Part 1: Getting Started with the BBC Micro:bit
6
Part 2: Programming Hardware with MicroPython
10
Part 3: Filesystems and Programming Analog I/O
13
Part 4: Advanced Hardware Interfacing and Applications

Creating and reading files

Micro:bit has a persistent filesystem. This means that the files remain intact even when we power it off. Micro:bit stores all the files in the flash memory. We can use approximately 30 KB of flash memory to store our own files. One of the constraints of the Micro:bit filesystem is that it provides a flat filesystem. This means that we cannot create directories (folders) and subdirectories. It won’t allow us to create a hierarchy of directories and files as commonly found in operating systems such as Windows, Unix, FreeBSD, and Linux. The stored files will remain intact until we delete them either manually or programmatically. Also, re-flashing the Micro:bit deletes a file(s).

We can create and store files with any extension on Micro:bit. We can use the built-in open() function to create a file in various modes. We have to specify whether we wish to read or write the file in the arguments. The 'w' argument stands for write mode. Here is...

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