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Go Microcontrollers

Installation

Install Go

  • download Go
  • tar -xf go*.tar.gz # extract archive
  • mv go ~ # put go folder to home
  • echo 'PATH="~/go/bin:$PATH"' >> ~/.bashrc # add go to PATH through .bashrc (or echo 'export "PATH=~/Applications/go/bin:$PATH" >> ~/.zshrc if you use ZSH / OhMyZSH)

Install TinyGo

  • Go to https://github.com/tinygo-org/tinygo/releases and get corresponding package OR https://tinygo.org/getting-started/install/ and follow instructions
wget https://github.com/tinygo-org/tinygo/releases/download/v0.26.0/tinygo_0.26.0_amd64.deb
sudo dpkg -i tinygo_0.26.0_amd64.deb
  • Test everything's ok with tinygo version
  • packages are stored in /usr/local/lib/tinygo/src

First test

mkdir -p ~/goTest/01-Test
cd ~/goTest/01-Test
go mod init blinky

blink.go file : 

package main

import (
    "machine"
    "time"
)

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

    for {
        led.Low()
        time.Sleep(time.Second / 2)
        led.High()
        time.Sleep(time.Second / 2)
    }
}
  • Build file using tinygo build -target=targetname (where targetname is one of the available targets in tinygo targets) : will create an elf file
  • cand create other formats by giving output argument (extension will determine format) like tinygo build -o 01_test.bin -target=pico for example
  • Flash it with tinygo flash -target=pico (will create )

Using drivers

  • go get tinygo.org/x/drivers inside a module (otherwise will lead to "go get" depreciation message => use go install etc. (just read the instructions))

Try to compile the dev branch of tinyGo

sudo apt install cmake clang-13 llvm-13-dev lld-13 libclang-13-dev - sudo apt install cmake clang-14 llvm-14-dev lld-14 libclang-14-dev - git clone https://github.com/tinygo-org/tinygo.git (from https://github.com/tinygo-org/tinygo)

  • make llvm-source
  • make llvm-build

Todo

  • (re)read article in num37 about raspberry pico