Embedded programming with Go

Go language is suitable for embedded programming because of its powerful concurrency and system programming capabilities. In embedded programming, Go can be used to create efficient applications such as IoT devices, wearables, and home appliances. Specific use cases include: Blinking LEDs: Use the machine package to control the Arduino hardware and cycle through the blinking LEDs. Compile and upload: Use a cross-compiler to compile the code, then use the serial port to upload the ELF file to the Arduino.

Embedded Programming with Go

Introduction

The Go language is famous for its Known for its strengths in concurrency and systems programming, it is also ideal for embedded programming. Embedded programming involves creating software that runs on a microcontroller or other resource-constrained device.

Tools

• Go toolchain: includes compiler and linker
• Cross compiler: compiles Go code into embedded targets Required tools
• Debugging tools: used to debug and analyze embedded programs

Practical case

Flashing LED

Let's create a simple program to blink an LED on an Arduino Uno.

Code:

package main

import (
    "fmt"
    "machine"
)

func main() {
    led := machine.LED
    led.Configure(machine.PinConfig{Mode: machine.PinOutput})

    for {
        led.High()
        fmt.Println("LED ON")
        time.Sleep(500 * time.Millisecond)
        led.Low()
        fmt.Println("LED OFF")
        time.Sleep(500 * time.Millisecond)
    }
}

Explanation:

• We use the machine package to control Arduino hardware.
• Cycles the LED, on for 500 milliseconds, then off for 500 milliseconds.

Compile and upload

1. Compile code using cross-compiler:

go build -o main.elf main.go

2. Use serial port to upload ELF file to Arduino:

avrdude -c avr109 -p atmega328p -U flash:w:main.elf

Other use cases

Other use cases for embedded Go include:

• IoT devices
• Wearable devices
• Home appliances

Advantages

• Concurrency: Go’s coroutine model is very useful for handling multitasking in embedded systems.
• System Programming Features: Go provides direct access to low-level hardware and peripherals.
• Cross-platform: Go code can be compiled to a variety of embedded targets.

Conclusion

Go is a powerful language for creating efficient and reliable embedded applications. Its concurrency and system programming capabilities make it ideal for such tasks.

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