digispark

README

Digispark

The Digispark is an Attiny85 based microcontroller development board similar to the Arduino line, only cheaper, smaller, and a bit less powerful. With a whole host of shields to extend its functionality and the ability to use the familiar Arduino IDE the Digispark is a great way to jump into electronics, or perfect for when an Arduino is too big or too much.

This package provides the Gobot adaptor for the Digispark ATTiny-based USB development board with the Little Wire protocol firmware installed.

How to Install

This package requires libusb.

OSX

To install libusb on OSX using Homebrew:

$ brew install libusb && brew install libusb-compat

Ubuntu

To install libusb on linux:

$ sudo apt-get install libusb-dev

Now you can install the package with

go get -d -u gobot.io/x/gobot/...

How to Use

package main

import (
	"time"

	"gobot.io/x/gobot"
	"gobot.io/x/gobot/drivers/gpio"
	"gobot.io/x/gobot/platforms/digispark"
)

func main() {
	digisparkAdaptor := digispark.NewAdaptor()
	led := gpio.NewLedDriver(digisparkAdaptor, "0")

	work := func() {
		gobot.Every(1*time.Second, func() {
			led.Toggle()
		})
	}

	robot := gobot.NewRobot("blinkBot",
		[]gobot.Connection{digisparkAdaptor},
		[]gobot.Device{led},
		work,
	)

	robot.Start()
}

How to Connect

If your Digispark already has the Little Wire protocol firmware installed, you can connect right away with Gobot.

Otherwise, you must first flash your Digispark with the Little Wire firmware.

The easiest way to flash your Digispark is to use Gort https://gort.io.

Download and install Gort, and then use the following commands:

Then, install the needed Digispark firmware.

gort digispark install

OSX

Important: 2012 MBP The USB ports on the 2012 MBPs (Retina and non) cause issues due to their USB3 controllers, currently the best work around is to use a cheap USB hub (non USB3).

Plug the Digispark into your computer via the USB port and run:

gort digispark upload littlewire

Ubuntu

Ubuntu requires an extra one-time step to set up the Digispark for communication with Gobot. Run the following command:

gort digispark set-udev-rules

You might need to enter your administrative password. This steps adds a udev rule to allow access to the Digispark device.

Once this is done, you can upload Little Wire to your Digispark:

gort digispark upload littlewire

Windows

We need instructions here, because it supposedly works.

Manual instructions

For manual instructions on how to install Little Wire on a Digispark check out http://digistump.com/board/index.php/topic,160.0.html

Thanks to @bluebie for these instructions! (https://github.com/Bluebie/micronucleus-t85/wiki/Ubuntu-Linux)

Now plug the Digispark into your computer via the USB port.

Documentation

Overview

Package digispark provides the Gobot adaptor for the Digispark ATTiny-based USB development board.

Installing:

This package requires installing `libusb`. Then you can install the package with:

go get -u -d gobot.io/x/gobot/platforms/digispark

Example:

package main

import (
	"time"

	"gobot.io/x/gobot"
	"gobot.io/x/gobot/drivers/gpio"
	"gobot.io/x/gobot/platforms/digispark"
)

func main() {
	digisparkAdaptor := digispark.NewAdaptor()
	led := gpio.NewLedDriver(digisparkAdaptor, "0")

	work := func() {
		gobot.Every(1*time.Second, func() {
			led.Toggle()
		})
	}

	robot := gobot.NewRobot("blinkBot",
		[]gobot.Connection{digisparkAdaptor},
		[]gobot.Device{led},
		work,
	)

	robot.Start()
}

For further information refer to digispark README: https://github.com/hybridgroup/gobot/blob/master/platforms/digispark/README.md

Index

• Variables
• func NewDigisparkI2cConnection(adaptor *Adaptor, address uint8) (connection *digisparkI2cConnection)
• type Adaptor
  • func NewAdaptor() *Adaptor
  • func (d *Adaptor) Connect() (err error)
  • func (d *Adaptor) DigitalWrite(pin string, level byte) (err error)
  • func (d *Adaptor) Finalize() (err error)
  • func (d *Adaptor) GetConnection(address int, bus int) (connection i2c.Connection, err error)
  • func (d *Adaptor) GetDefaultBus() int
  • func (d *Adaptor) Name() string
  • func (d *Adaptor) PwmWrite(pin string, value byte) (err error)
  • func (d *Adaptor) ServoWrite(pin string, angle uint8) (err error)
  • func (d *Adaptor) SetName(n string)

Variables

var ErrConnection = errors.New("connection error")

ErrConnection is the error resulting of a connection error with the digispark

Functions

func NewDigisparkI2cConnection

func NewDigisparkI2cConnection(adaptor *Adaptor, address uint8) (connection *digisparkI2cConnection)

NewDigisparkI2cConnection creates an i2c connection to an i2c device at the specified address

Types

type Adaptor

type Adaptor struct {
	// contains filtered or unexported fields
}

Adaptor is the Gobot Adaptor for the Digispark

func NewAdaptor

func NewAdaptor() *Adaptor

NewAdaptor returns a new Digispark Adaptor

func (*Adaptor) Connect

func (d *Adaptor) Connect() (err error)

Connect starts a connection to the digispark

func (*Adaptor) DigitalWrite

func (d *Adaptor) DigitalWrite(pin string, level byte) (err error)

DigitalWrite writes a value to the pin. Acceptable values are 1 or 0.

func (*Adaptor) Finalize

func (d *Adaptor) Finalize() (err error)

Finalize implements the Adaptor interface

func (*Adaptor) GetConnection

func (d *Adaptor) GetConnection(address int, bus int) (connection i2c.Connection, err error)

GetConnection returns an i2c connection to a device on a specified bus. Only supports bus number 0

func (*Adaptor) GetDefaultBus

func (d *Adaptor) GetDefaultBus() int

GetDefaultBus returns the default i2c bus for this platform

func (*Adaptor) Name

func (d *Adaptor) Name() string

Name returns the Digispark Adaptors name

func (*Adaptor) PwmWrite

func (d *Adaptor) PwmWrite(pin string, value byte) (err error)

PwmWrite writes the 0-254 value to the specified pin

func (*Adaptor) ServoWrite

func (d *Adaptor) ServoWrite(pin string, angle uint8) (err error)

ServoWrite writes the 0-180 degree val to the specified pin.

func (*Adaptor) SetName

func (d *Adaptor) SetName(n string)

SetName sets the Digispark Adaptors name