Book Image

Creative DIY Microcontroller Projects with TinyGo and WebAssembly

By : Tobias Theel
Book Image

Creative DIY Microcontroller Projects with TinyGo and WebAssembly

By: Tobias Theel

Overview of this book

While often considered a fast and compact programming language, Go usually creates large executables that are difficult to run on low-memory or low-powered devices such as microcontrollers or IoT. TinyGo is a new compiler that allows developers to compile their programs for such low-powered devices. As TinyGo supports all the standard features of the Go programming language, you won't have to tweak the code to fit on the microcontroller. This book is a hands-on guide packed full of interesting DIY projects that will show you how to build embedded applications. You will learn how to program sensors and work with microcontrollers such as Arduino UNO and Arduino Nano IoT 33. The chapters that follow will show you how to develop multiple real-world embedded projects using a variety of popular devices such as LEDs, 7-segment displays, and timers. Next, you will progress to build interactive prototypes such as a traffic lights system, touchless hand wash timer, and more. As you advance, you'll create an IoT prototype of a weather alert system and display those alerts on the TinyGo WASM dashboard. Finally, you will build a home automation project that displays stats on the TinyGo WASM dashboard. By the end of this microcontroller book, you will be equipped with the skills you need to build real-world embedded projects using the power of TinyGo.
Table of Contents (13 chapters)

Chapter 6: Building Displays for Communication using I2C and SPI Interfaces

In the previous chapter, we learned how to display data using a 7-segment display, how a MAX7219 chip works, how ultrasonic distance sensors work, and how to write a library for all this. We used the SPI interface to do so.

After working through this chapter, we will know how to use different types of displays and which displays use different interfaces for communication. We are going to learn how the I2C interface works by using a display that we can connect using an I2C bus. With that covered, we are going to learn how to read and interpret user input. After that, we are going to learn how to draw shapes and texts on displays. Finally, we are going to learn how to build a game that can run on a microcontroller. With this knowledge, we will be able to understand the overall concept of using various displays for communication.

In this chapter, we're going to cover the following main topics: