TinyGo for Embedded Systems and WebAssembly (eBook)

The Complete Guide for Developers and Engineers

William Smith (Autor)

eBook Download: EPUB

2025 | 1. Auflage
250 Seiten
HiTeX Press (Verlag)
978-0-00-097410-5 (ISBN)

Infos

'TinyGo for Embedded Systems and WebAssembly'
'TinyGo for Embedded Systems and WebAssembly' is a comprehensive guide for engineers and developers eager to harness the power of Go in resource-constrained environments and next-generation web platforms. This book provides a meticulous exploration of TinyGo's architecture, language design, and compilation toolchain, illustrating how it bridges the gap between conventional Go programming and the demands of embedded systems and WebAssembly (WASM). It introduces newcomers to the project's ecosystem, development workflow, community-driven libraries, and best practices for robust project structure and efficient dependency management.
The core chapters delve into real-world embedded development: configuring and programming hardware peripherals, managing I/O, handling interrupts, optimizing for memory and energy efficiency, and porting TinyGo to custom boards. It addresses advanced topics such as concurrency, real-time scheduling, and the unique constraints of embedded operating environments. The book also covers the full range of peripheral communication protocols, strategies for over-the-air updates, and techniques for testing, simulation, and debugging on both hardware and virtual platforms, equipping developers to build resilient, maintainable firmware.
Expanding beyond microcontrollers, the book offers an authoritative treatment of TinyGo's WebAssembly capabilities, including JavaScript interoperability, browser API integration, system contexts via WASI, and best practices for packaging and deployment. Security is woven throughout, with thorough coverage of threat models, sandboxing, secure communications, and resilience against a wide spectrum of attacks. Through practical case studies-in areas such as Industrial IoT, Edge Computing, and serverless environments-the book not only demonstrates TinyGo's production impact but also highlights the community's path forward, making it an indispensable resource for innovators working at the intersection of Go, embedded hardware, and the evolving WASM landscape.

Textauszug

Chapter 2
Embedded Systems Development with TinyGo

Dive beneath the surface of microcontroller programming and discover how TinyGo opens new possibilities for Go developers. This chapter takes you through practical, in-depth engineering with real embedded hardware, revealing the techniques and trade-offs needed to achieve robust, performant, and power-efficient systems in environments where every byte and microsecond counts.

2.1 I/O Programming: GPIO, PWM, ADC/DAC, and Timers

Interfacing with physical hardware necessitates precise control over input/output (I/O) pins, providing both digital and analog functionalities. TinyGo offers a high-level Go API layered on top of low-level hardware registers and peripherals, enabling safe and efficient manipulation of General Purpose Input/Output (GPIO), Pulse Width Modulation (PWM), Analog-to-Digital Converters (ADC), Digital-to-Analog Converters (DAC), and timers/counters. Mastery of these abstractions unlocks the ability to integrate sensors, actuators, and converters within embedded systems while tackling hardware-specific constraints and timing requirements.

GPIO: Digital Input and Output

TinyGo abstracts GPIO pins through the gpio.Pin type, allowing convenient digital input and output control with direction flags. Pins must be explicitly configured as input or output before reading or writing values.

The following snippet configures a GPIO pin as output and toggles its state:

var ledPin gpio.Pin = machine.LED // Board-specific LED pin 
 
func setup() { 
    ledPin.Configure(gpio.Config{Mode: gpio.Output}) 
} 
 
func loop() { 
    ledPin.High() // Set pin to logic high 
    time.Sleep(time.Millisecond * 500) 
    ledPin.Low()  // Set pin to logic low 
    time.Sleep(time.Millisecond * 500) 
}

Input pins support pull-up and pull-down resistors, configurable with the gpio.PullUp and gpio.PullDown modes. This is critical for reading switches or buttons reliably, considering floating pin states.

Reading a digital input with a pull-up resistor:

buttonPin.Configure(gpio.Config{Mode: gpio.Input, Pull: gpio.PullUp}) 
state := buttonPin.Get() // Returns true if logic high, false if low

Careful attention to electrical characteristics such as voltage levels and input leakage currents ensures integrity of digital signal readings under noisy conditions.

PWM: Analog Voltage Approximation via Duty Cycle

TinyGo provides PWM capabilities to generate variable duty cycle square waves on output pins. PWM signals emulate analog voltage levels by varying the proportion of “on” time within a fixed period.

The machine.PWM type controls pulse frequency and duty cycle. The frequency corresponds to the period, and duty cycle ranges from 0 (always off) to max (always on), typically with 16-bit resolution.

Example configuring a PWM pin and varying duty cycle:

pwmPin.Configure() 
pwmPin.SetPeriod(1 * time.Millisecond) // 1 kHz frequency 
 
...

Produkt-Details

• Erscheint lt. Verlag: 24.7.2025
• Sprache: englisch
• Themenwelt: Mathematik / Informatik ► Informatik ► Programmiersprachen / -werkzeuge
• ISBN-10: 0-00-097410-2 / 0000974102
• ISBN-13: 978-0-00-097410-5 / 9780000974105