tinygo

command module
Version: v0.6.0 Latest Latest
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Published: May 29, 2019 License: BSD-3-Clause Imports: 26 Imported by: 0

README

TinyGo - Go compiler for small places

CircleCI

TinyGo is a Go compiler intended for use in small places such as microcontrollers, WebAssembly (WASM), and command-line tools.

It reuses libraries used by the Go language tools alongside LLVM to provide an alternative way to compile programs written in the Go programming language.

Here is an example program that blinks the built-in LED when run directly on any supported board with onboard LED:

package main

import (
    "machine"
    "time"
)

func main() {
    led := machine.LED
    led.Configure(machine.PinConfig{Mode: machine.PinOutput})
    for {
        led.Low()
        time.Sleep(time.Millisecond * 1000)

        led.High()
        time.Sleep(time.Millisecond * 1000)
    }
}

The above program can be compiled and run without modification on an Arduino Uno, an Adafruit ItsyBitsy M0, or any of the supported boards that have a built-in LED, just by setting the correct TinyGo compiler target. For example, this compiles and flashes an Arduino Uno:

tinygo flash -target arduino examples/blinky1

Installation

See the getting started instructions for information on how to install TinyGo, as well as how to run the TinyGo compiler using our Docker container.

Supported boards/targets

You can compile TinyGo programs for microcontrollers, WebAssembly and Linux.

The following 14 microcontroller boards are currently supported:

For more information, see this list of boards. Pull requests for additional support are welcome!

Currently supported features:

For a description of currently supported Go language features, please see https://tinygo.org/lang-support/.

Documentation

Documentation is located on our web site at https://tinygo.org/.

You can find the web site code at https://github.com/tinygo-org/tinygo-site.

Getting help

If you're looking for a more interactive way to discuss TinyGo usage or development, we have a #TinyGo channel on the Gophers Slack.

If you need an invitation for the Gophers Slack, you can generate one here which should arrive fairly quickly (under 1 min): https://invite.slack.golangbridge.org

Contributing

Your contributions are welcome!

Please take a look at our CONTRIBUTING.md document for details.

Project Scope

Goals:

  • Have very small binary sizes. Don't pay for what you don't use.
  • Support for most common microcontroller boards.
  • Be usable on the web using WebAssembly.
  • Good CGo support, with no more overhead than a regular function call.
  • Support most standard library packages and compile most Go code without modification.

Non-goals:

  • Using more than one core.
  • Be efficient while using zillions of goroutines. However, good goroutine support is certainly a goal.
  • Be as fast as gc. However, LLVM will probably be better at optimizing certain things so TinyGo might actually turn out to be faster for number crunching.
  • Be able to compile every Go program out there.

Why this project exists

We never expected Go to be an embedded language and so its got serious problems...

-- Rob Pike, GopherCon 2014 Opening Keynote

TinyGo is a project to bring Go to microcontrollers and small systems with a single processor core. It is similar to emgo but a major difference is that we want to keep the Go memory model (which implies garbage collection of some sort). Another difference is that TinyGo uses LLVM internally instead of emitting C, which hopefully leads to smaller and more efficient code and certainly leads to more flexibility.

The original reasoning was: if Python can run on microcontrollers, then certainly Go should be able to run on even lower level micros.

License

This project is licensed under the BSD 3-clause license, just like the Go project itself.

Documentation

Overview

Converts firmware files from BIN to UF2 format before flashing.

For more information about the UF2 firmware file format, please see: https://github.com/Microsoft/uf2

Directories

Path Synopsis
Package cgo implements CGo by modifying a loaded AST.
Package cgo implements CGo by modifying a loaded AST.
Package interp interprets Go package initializers as much as possible.
Package interp interprets Go package initializers as much as possible.
src
device/arm
CMSIS abstraction functions.
CMSIS abstraction functions.
examples/blinkm
Connects to an BlinkM I2C RGB LED.
Connects to an BlinkM I2C RGB LED.
examples/echo
This is a echo console running on the device UART.
This is a echo console running on the device UART.
examples/i2s
Example using the i2s hardware interface on the Adafruit Circuit Playground Express to read data from the onboard MEMS microphone.
Example using the i2s hardware interface on the Adafruit Circuit Playground Express to read data from the onboard MEMS microphone.
examples/mcp3008
Connects to an MCP3008 ADC via SPI.
Connects to an MCP3008 ADC via SPI.
examples/microbit-blink
blink program for the BBC micro:bit
blink program for the BBC micro:bit
os
Package os implements a subset of the Go "os" package.
Package os implements a subset of the Go "os" package.
runtime/volatile
Package volatile provides definitions for volatile loads and stores.
Package volatile provides definitions for volatile loads and stores.

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