beaglebone

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Version: v1.3.0 Latest Latest
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Published: Mar 22, 2017 License: Apache-2.0, Apache-2.0 Imports: 13 Imported by: 0

README

Beaglebone

The BeagleBone is an ARM based single board computer, with lots of GPIO, I2C, and analog interfaces built in.

The Gobot adaptor for the BeagleBone should support all of the various BeagleBone boards such as the BeagleBone Black, SeeedStudio BeagleBone Green, SeeedStudio BeagleBone Green Wireless, and others that use the latest Debian and standard "Cape Manager" interfaces.

We recommend updating to the latest Debian Jessie OS when using the BeagleBone, however Gobot should also support older versions of the OS, should your application require this.

For more info about the BeagleBone platform go to http://beagleboard.org/getting-started.

How to Install

go get -d -u gobot.io/x/gobot/... && go install gobot.io/x/gobot/platforms/beaglebone

How to Use

The pin numbering used by your Gobot program should match the way your board is labeled right on the board itself.

Gobot also has support for the four built-in LEDs on the BeagleBone Black, by referring to them as usr0, usr1, usr2, and usr3.

package main

import (
	"time"

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

func main() {
	beagleboneAdaptor := beaglebone.NewAdaptor()
	led := gpio.NewLedDriver(beagleboneAdaptor, "P9_12")

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

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

	robot.Start()
}

How to Connect

Compiling

Simply compile your Gobot program like this:

$ GOARM=7 GOARCH=arm GOOS=linux go build examples/beaglebone_blink.go

If you are running the official Debian Linux through the usb->ethernet connection, or are connected to the board using WiFi, you can simply upload your program and execute it with the scp command like this:

$ scp beaglebone_blink root@192.168.7.2:/home/root/
$ ssh -t root@192.168.7.2 "./beaglebone_blink"
Updating your board to the latest OS

We recommend updating your BeagleBone to the latest Debian OS. It is very easy to do this using the Etcher (https://etcher.io/) utility program.

First, download the latest BeagleBone OS from http://beagleboard.org/latest-images

Now, use Etcher to create an SD card with the OS image you have downloaded.

Once you have created the SD card, boot your BeagleBone using the new image as follows:

  • Insert SD card into your (powered-down) board, hold down the USER/BOOT button (if using Black) and apply power, either by the USB cable or 5V adapter.

  • If all you want to do it boot once from the SD card, it should now be booting.

  • If using BeagleBone Black and desire to write the image to your on-board eMMC, you'll need to follow the instructions at http://elinux.org/Beagleboard:BeagleBoneBlack_Debian#Flashing_eMMC. When the flashing is complete, all 4 USRx LEDs will be steady on or off. The latest Debian flasher images automatically power down the board upon completion. This can take up to 45 minutes. Power-down your board, remove the SD card and apply power again to be complete.

These instructions come from the Beagleboard web site's "Getting Started" page located here:

http://beagleboard.org/getting-started

Documentation

Overview

Package beaglebone provides the Gobot adaptor for the Beaglebone Black.

Installing:

go get gobot.io/x/gobot/platforms/beaglebone

Example:

package main

import (
	"time"

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

func main() {
	beagleboneAdaptor := beaglebone.NewAdaptor()
	led := gpio.NewLedDriver(beagleboneAdaptor, "P9_12")

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

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

	robot.Start()
}

For more information refer to the beaglebone README: https://github.com/hybridgroup/gobot/blob/master/platforms/beaglebone/README.md

Index

Constants

This section is empty.

Variables

This section is empty.

Functions

This section is empty.

Types

type Adaptor added in v1.0.0

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

Adaptor is the gobot.Adaptor representation for the Beaglebone

func NewAdaptor added in v1.0.0

func NewAdaptor() *Adaptor

NewAdaptor returns a new Beaglebone Adaptor

func (*Adaptor) AnalogRead added in v1.0.0

func (b *Adaptor) AnalogRead(pin string) (val int, err error)

AnalogRead returns an analog value from specified pin

func (*Adaptor) Connect added in v1.0.0

func (b *Adaptor) Connect() error

Connect initializes the pwm and analog dts.

func (*Adaptor) DigitalRead added in v1.0.0

func (b *Adaptor) DigitalRead(pin string) (val int, err error)

DigitalRead returns a digital value from specified pin

func (*Adaptor) DigitalWrite added in v1.0.0

func (b *Adaptor) DigitalWrite(pin string, val byte) (err error)

DigitalWrite writes a digital value to specified pin. valid usr pin values are usr0, usr1, usr2 and usr3

func (*Adaptor) Finalize added in v1.0.0

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

Finalize releases all i2c devices and exported analog, digital, pwm pins.

func (*Adaptor) GetConnection added in v1.2.0

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

GetConnection returns a connection to a device on a specified bus. Valid bus number is either 0 or 2 which corresponds to /dev/i2c-0 or /dev/i2c-2.

func (*Adaptor) GetDefaultBus added in v1.2.0

func (b *Adaptor) GetDefaultBus() int

GetDefaultBus returns the default i2c bus for this platform

func (*Adaptor) Kernel added in v1.0.0

func (b *Adaptor) Kernel() string

Kernel returns the Linux kernel version for the BeagleBone

func (*Adaptor) Name added in v1.0.0

func (b *Adaptor) Name() string

Name returns the Adaptor name

func (*Adaptor) PwmWrite added in v1.0.0

func (b *Adaptor) PwmWrite(pin string, val byte) (err error)

PwmWrite writes the 0-254 value to the specified pin

func (*Adaptor) ServoWrite added in v1.0.0

func (b *Adaptor) ServoWrite(pin string, val byte) (err error)

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

func (*Adaptor) SetName added in v1.0.0

func (b *Adaptor) SetName(n string)

SetName sets the Adaptor name

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