i2c

package
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 Go to latest Published: Feb 16, 2017 License: Apache-2.0, Apache-2.0 Imports: 11 Imported by: 0

README

I2C

This package provides drivers for i2cdevices. It must be used along with an adaptor such as firmata that supports the needed interfaces for i2c devices.

Getting Started

Installing

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

Hardware Support

Gobot has a extensible system for connecting to hardware devices. The following i2c devices are currently supported:

  • Adafruit Motor Hat
  • BlinkM LED
  • BMP180 Barometric Pressure/Temperature/Altitude Sensor
  • Grove Digital Accelerometer
  • Grove RGB LCD
  • HMC6352 Compass
  • JHD1313M1 LCD Display w/RGB Backlight
  • LIDAR-Lite
  • L3GD20H 3-Axis Gyroscope
  • MCP23017 Port Expander
  • MMA7660 3-Axis Accelerometer
  • MPL115A2 Barometer
  • MPU6050 Accelerometer/Gyroscope
  • SHT3x-D Temperature/Humidity
  • Wii Nunchuck Controller

More drivers are coming soon...

Using A Different Bus or Address

You can set a different I2C address or I2C bus than the default when initializing your I2C drivers by using optional parameters. Here is an example:

blinkm := i2c.NewBlinkMDriver(e, i2c.WithBus(0), i2c.WithAddress(0x09))

Documentation

Overview

Package i2c provides Gobot drivers for i2c devices.

Installing: 

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

For further information refer to i2c README: https://github.com/hybridgroup/gobot/blob/master/drivers/i2c/README.md

Index

Constants

View Source 
const (
	// BusNotInitialized is the initial value for a bus
	BusNotInitialized = -1

	// AddressNotInitialized is the initial value for an address
	AddressNotInitialized = -1
)
View Source 
const (
	REG_RED   = 0x04
	REG_GREEN = 0x03
	REG_BLUE  = 0x02

	LCD_CLEARDISPLAY        = 0x01
	LCD_RETURNHOME          = 0x02
	LCD_ENTRYMODESET        = 0x04
	LCD_DISPLAYCONTROL      = 0x08
	LCD_CURSORSHIFT         = 0x10
	LCD_FUNCTIONSET         = 0x20
	LCD_SETCGRAMADDR        = 0x40
	LCD_SETDDRAMADDR        = 0x80
	LCD_ENTRYRIGHT          = 0x00
	LCD_ENTRYLEFT           = 0x02
	LCD_ENTRYSHIFTINCREMENT = 0x01
	LCD_ENTRYSHIFTDECREMENT = 0x00
	LCD_DISPLAYON           = 0x04
	LCD_DISPLAYOFF          = 0x00
	LCD_CURSORON            = 0x02
	LCD_CURSOROFF           = 0x00
	LCD_BLINKON             = 0x01
	LCD_BLINKOFF            = 0x00
	LCD_DISPLAYMOVE         = 0x08
	LCD_CURSORMOVE          = 0x00
	LCD_MOVERIGHT           = 0x04
	LCD_MOVELEFT            = 0x00
	LCD_2LINE               = 0x08
	LCD_CMD                 = 0x80
	LCD_DATA                = 0x40

	LCD_2NDLINEOFFSET = 0x40
)
View Source 
const (
	MMA7660_X              = 0x00
	MMA7660_Y              = 0x01
	MMA7660_Z              = 0x02
	MMA7660_TILT           = 0x03
	MMA7660_SRST           = 0x04
	MMA7660_SPCNT          = 0x05
	MMA7660_INTSU          = 0x06
	MMA7660_MODE           = 0x07
	MMA7660_STAND_BY       = 0x00
	MMA7660_ACTIVE         = 0x01
	MMA7660_SR             = 0x08
	MMA7660_AUTO_SLEEP_120 = 0x00
	MMA7660_AUTO_SLEEP_64  = 0x01
	MMA7660_AUTO_SLEEP_32  = 0x02
	MMA7660_AUTO_SLEEP_16  = 0x03
	MMA7660_AUTO_SLEEP_8   = 0x04
	MMA7660_AUTO_SLEEP_4   = 0x05
	MMA7660_AUTO_SLEEP_2   = 0x06
	MMA7660_AUTO_SLEEP_1   = 0x07
	MMA7660_PDET           = 0x09
	MMA7660_PD             = 0x0A
)
View Source 
const (
	// Joystick event when the Wiichuck joystick is moved
	Joystick = "joystick"

	// C event when the Wiichuck "C" button is pressed
	C = "c"

	// Z event when the Wiichuck "C" button is pressed
	Z = "z"
)
View Source 
const (
	// Error event
	Error = "error"
)
View Source 
const MPL115A2_REGISTER_A0_COEFF_LSB = 0x05
View Source 
const MPL115A2_REGISTER_A0_COEFF_MSB = 0x04
View Source 
const MPL115A2_REGISTER_B1_COEFF_LSB = 0x07
View Source 
const MPL115A2_REGISTER_B1_COEFF_MSB = 0x06
View Source 
const MPL115A2_REGISTER_B2_COEFF_LSB = 0x09
View Source 
const MPL115A2_REGISTER_B2_COEFF_MSB = 0x08
View Source 
const MPL115A2_REGISTER_C12_COEFF_LSB = 0x0B
View Source 
const MPL115A2_REGISTER_C12_COEFF_MSB = 0x0A
View Source 
const MPL115A2_REGISTER_PRESSURE_LSB = 0x01
View Source 
const MPL115A2_REGISTER_PRESSURE_MSB = 0x00
View Source 
const MPL115A2_REGISTER_STARTCONVERSION = 0x12
View Source 
const MPL115A2_REGISTER_TEMP_LSB = 0x03
View Source 
const MPL115A2_REGISTER_TEMP_MSB = 0x02
View Source 
const MPU6050_ACCEL_FS_2 = 0x00
View Source 
const MPU6050_ACONFIG_AFS_SEL_BIT = 4
View Source 
const MPU6050_ACONFIG_AFS_SEL_LENGTH = 2
View Source 
const MPU6050_CLOCK_PLL_XGYRO = 0x01
View Source 
const MPU6050_GCONFIG_FS_SEL_BIT = 4
View Source 
const MPU6050_GCONFIG_FS_SEL_LENGTH = 2
View Source 
const MPU6050_GYRO_FS_250 = 0x00
View Source 
const MPU6050_PWR1_CLKSEL_BIT = 2
View Source 
const MPU6050_PWR1_CLKSEL_LENGTH = 3
View Source 
const MPU6050_PWR1_ENABLE_BIT = 0
View Source 
const MPU6050_PWR1_SLEEP_BIT = 6
View Source 
const MPU6050_RA_ACCEL_CONFIG = 0x1C
View Source 
const MPU6050_RA_ACCEL_XOUT_H = 0x3B
View Source 
const MPU6050_RA_GYRO_CONFIG = 0x1B
View Source 
const MPU6050_RA_PWR_MGMT_1 = 0x6B
View Source 
const SHT3xAccuracyHigh = 0x00

SHT3xAccuracyHigh is the high accuracy and slowest sample setting

View Source 
const SHT3xAccuracyLow = 0x16

SHT3xAccuracyLow is the faster, but lower accuracy sample setting

View Source 
const SHT3xAccuracyMedium = 0x0b

SHT3xAccuracyMedium is the medium accuracy and speed sample setting

View Source 
const SHT3xAddressA = 0x44

SHT3xAddressA is the default address of device

View Source 
const SHT3xAddressB = 0x45

SHT3xAddressB is the optional address of device

Variables

View Source 
var (
	ErrEncryptedBytes  = errors.New("Encrypted bytes")
	ErrNotEnoughBytes  = errors.New("Not enough bytes read")
	ErrNotReady        = errors.New("Device is not ready")
	ErrInvalidPosition = errors.New("Invalid position value")
)
View Source 
var (
	ErrInvalidAccuracy = errors.New("Invalid accuracy")
	ErrInvalidCrc      = errors.New("Invalid crc")
	ErrInvalidTemp     = errors.New("Invalid temperature units")
)
View Source 
var CustomLCDChars = map[string][8]byte{
	"é":       {130, 132, 142, 145, 159, 144, 142, 128},
	"è":       {136, 132, 142, 145, 159, 144, 142, 128},
	"ê":       {132, 138, 142, 145, 159, 144, 142, 128},
	"à":       {136, 134, 128, 142, 145, 147, 141, 128},
	"â":       {132, 138, 128, 142, 145, 147, 141, 128},
	"á":       {2, 4, 14, 1, 15, 17, 15, 0},
	"î":       {132, 138, 128, 140, 132, 132, 142, 128},
	"í":       {2, 4, 12, 4, 4, 4, 14, 0},
	"û":       {132, 138, 128, 145, 145, 147, 141, 128},
	"ù":       {136, 134, 128, 145, 145, 147, 141, 128},
	"ñ":       {14, 0, 22, 25, 17, 17, 17, 0},
	"ó":       {2, 4, 14, 17, 17, 17, 14, 0},
	"heart":   {0, 10, 31, 31, 31, 14, 4, 0},
	"smiley":  {0, 0, 10, 0, 0, 17, 14, 0},
	"frowney": {0, 0, 10, 0, 0, 0, 14, 17},
}

CustomLCDChars is a map of CGRAM characters that can be loaded into a LCD screen to display custom characters. Some LCD screens such as the Grove screen (jhd1313m1) isn't loaded with latin 1 characters. It's up to the developer to load the set up to 8 custom characters and update the input text so the character is swapped by a byte reflecting the position of the custom character to use. See SetCustomChar

Functions

func NewConnection added in v1.2.0 

func NewConnection(bus sysfs.I2cDevice, address int) (connection *i2cConnection)

NewConnection creates and returns a new connection to a specific i2c device on a bus and address.

func WithAddress added in v1.2.0 

func WithAddress(address int) func(Config)

WithAddress sets which address to use as a optional param.

func WithBus added in v1.2.0 

func WithBus(bus int) func(Config)

WithBus sets which bus to use as a optional param.

func WithMCP23017Bank added in v1.2.0 

func WithMCP23017Bank(val uint8) func(Config)

WithMCP23017Bank option sets the MCP23017Driver bank option

func WithMCP23017Disslw added in v1.2.0 

func WithMCP23017Disslw(val uint8) func(Config)

WithMCP23017Disslw option sets the MCP23017Driver Disslw option

func WithMCP23017Haen added in v1.2.0 

func WithMCP23017Haen(val uint8) func(Config)

WithMCP23017Haen option sets the MCP23017Driver Haen option

func WithMCP23017Intpol added in v1.2.0 

func WithMCP23017Intpol(val uint8) func(Config)

WithMCP23017Intpol option sets the MCP23017Driver Intpol option

func WithMCP23017Mirror added in v1.2.0 

func WithMCP23017Mirror(val uint8) func(Config)

WithMCP23017Mirror option sets the MCP23017Driver Mirror option

func WithMCP23017Odr added in v1.2.0 

func WithMCP23017Odr(val uint8) func(Config)

WithMCP23017Odr option sets the MCP23017Driver Odr option

func WithMCP23017Seqop added in v1.2.0 

func WithMCP23017Seqop(val uint8) func(Config)

WithMCP23017Seqop option sets the MCP23017Driver Seqop option

Types

type AdafruitDirection 

type AdafruitDirection int

AdafruitDirection declares a type for specification of the motor direction 

const (
	AdafruitForward  AdafruitDirection = iota // 0
	AdafruitBackward                          // 1
	AdafruitRelease                           // 2
)

type AdafruitMotorHatDriver 

type AdafruitMotorHatDriver struct {
	Config
	gobot.Commander
	// contains filtered or unexported fields
}

AdafruitMotorHatDriver is a driver for the DC+Stepper Motor HAT from Adafruit. The HAT is a Raspberry Pi add-on that can drive up to 4 DC or 2 Stepper motors with full PWM speed control. It has a dedicated PWM driver chip onboard to control both motor direction and speed over I2C.

func NewAdafruitMotorHatDriver 

func NewAdafruitMotorHatDriver(conn Connector, options ...func(Config)) *AdafruitMotorHatDriver

NewAdafruitMotorHatDriver initializes the internal DCMotor and StepperMotor types. Again the Adafruit Motor Hat supports up to four DC motors and up to two stepper motors. Params: 

conn Connector - the Adaptor to use with this Driver

Optional params: 

i2c.WithBus(int):	bus to use with this driver
i2c.WithAddress(int):	address to use with this driver

func (*AdafruitMotorHatDriver) Connection 

func (a *AdafruitMotorHatDriver) Connection() gobot.Connection

Connection identifies the particular adapter object

func (*AdafruitMotorHatDriver) Halt 

func (a *AdafruitMotorHatDriver) Halt() (err error)

Halt returns true if devices is halted successfully

func (*AdafruitMotorHatDriver) Name 

func (a *AdafruitMotorHatDriver) Name() string

Name identifies this driver object

func (*AdafruitMotorHatDriver) RunDCMotor 

func (a *AdafruitMotorHatDriver) RunDCMotor(dcMotor int, dir AdafruitDirection) (err error)

RunDCMotor will set the appropriate pins to run the specified DC motor for the given direction

func (*AdafruitMotorHatDriver) SetDCMotorSpeed 

func (a *AdafruitMotorHatDriver) SetDCMotorSpeed(dcMotor int, speed int32) (err error)

SetDCMotorSpeed will set the appropriate pins to run the specified DC motor for the given speed.

func (*AdafruitMotorHatDriver) SetMotorHatAddress 

func (a *AdafruitMotorHatDriver) SetMotorHatAddress(addr int) (err error)

SetMotorHatAddress sets the I2C address for the DC and Stepper Motor HAT. This addressing flexibility empowers "stacking" the HATs.

func (*AdafruitMotorHatDriver) SetName 

func (a *AdafruitMotorHatDriver) SetName(n string)

SetName sets nae for driver

func (*AdafruitMotorHatDriver) SetServoHatAddress 

func (a *AdafruitMotorHatDriver) SetServoHatAddress(addr int) (err error)

SetServoHatAddress sets the I2C address for the PWM-Servo Motor HAT. This addressing flexibility empowers "stacking" the HATs.

func (*AdafruitMotorHatDriver) SetServoMotorFreq 

func (a *AdafruitMotorHatDriver) SetServoMotorFreq(freq float64) (err error)

SetServoMotorFreq sets the frequency for the currently addressed PWM Servo HAT.

func (*AdafruitMotorHatDriver) SetServoMotorPulse 

func (a *AdafruitMotorHatDriver) SetServoMotorPulse(channel byte, on, off int32) (err error)

SetServoMotorPulse is a convenience function to specify the 'tick' value, between 0-4095, when the signal will turn on, and when it will turn off.

func (*AdafruitMotorHatDriver) SetStepperMotorSpeed 

func (a *AdafruitMotorHatDriver) SetStepperMotorSpeed(stepperMotor int, rpm int) (err error)

SetStepperMotorSpeed sets the seconds-per-step for the given Stepper Motor.

func (*AdafruitMotorHatDriver) Start 

func (a *AdafruitMotorHatDriver) Start() (err error)

Start initializes both I2C-addressable Adafruit Motor HAT drivers

func (*AdafruitMotorHatDriver) Step 

func (a *AdafruitMotorHatDriver) Step(motor, steps int, dir AdafruitDirection, style AdafruitStepStyle) (err error)

Step will rotate the stepper motor the given number of steps, in the given direction and step style.

type AdafruitStepStyle 

type AdafruitStepStyle int

AdafruitStepStyle declares a type for specification of the stepper motor rotation 

const (
	AdafruitSingle     AdafruitStepStyle = iota // 0
	AdafruitDouble                              // 1
	AdafruitInterleave                          // 2
	AdafruitMicrostep                           // 3
)

type BMP180Driver added in v1.1.0 

type BMP180Driver struct {
	Config
	// contains filtered or unexported fields
}

BMP180Driver is the gobot driver for the Bosch pressure sensor BMP180. Device datasheet: https://cdn-shop.adafruit.com/datasheets/BST-BMP180-DS000-09.pdf

func NewBMP180Driver added in v1.1.0 

func NewBMP180Driver(c Connector, options ...func(Config)) *BMP180Driver

NewBMP180Driver creates a new driver with the i2c interface for the BMP180 device. Params: 

conn Connector - the Adaptor to use with this Driver

Optional params: 

i2c.WithBus(int):	bus to use with this driver
i2c.WithAddress(int):	address to use with this driver

func (*BMP180Driver) Connection added in v1.1.0 

func (d *BMP180Driver) Connection() gobot.Connection

Connection returns the connection of the device.

func (*BMP180Driver) Halt added in v1.1.0 

func (d *BMP180Driver) Halt() (err error)

Halt halts the device.

func (*BMP180Driver) Name added in v1.1.0 

func (d *BMP180Driver) Name() string

Name returns the name of the device.

func (*BMP180Driver) Pressure added in v1.1.0 

func (d *BMP180Driver) Pressure(mode BMP180OversamplingMode) (pressure float32, err error)

Pressure returns the current pressure, in pascals.

func (*BMP180Driver) SetName added in v1.1.0 

func (d *BMP180Driver) SetName(n string)

SetName sets the name of the device.

func (*BMP180Driver) Start added in v1.1.0 

func (d *BMP180Driver) Start() (err error)

Start initializes the BMP180 and loads the calibration coefficients.

func (*BMP180Driver) Temperature added in v1.1.0 

func (d *BMP180Driver) Temperature() (temp float32, err error)

Temperature returns the current temperature, in celsius degrees.

type BMP180OversamplingMode added in v1.1.0 

type BMP180OversamplingMode uint

BMP180OversamplingMode is the oversampling ratio of the pressure measurement. 

const (
	// BMP180UltraLowPower is the lowest oversampling mode of the pressure measurement.
	BMP180UltraLowPower BMP180OversamplingMode = iota
	// BMP180Standard is the standard oversampling mode of the pressure measurement.
	BMP180Standard
	// BMP180HighResolution is a high oversampling mode of the pressure measurement.
	BMP180HighResolution
	// BMP180UltraHighResolution is the highest oversampling mode of the pressure measurement.
	BMP180UltraHighResolution
)

type BlinkMDriver 

type BlinkMDriver struct {
	Config
	gobot.Commander
	// contains filtered or unexported fields
}

BlinkMDriver is a Gobot Driver for a BlinkM LED

func NewBlinkMDriver 

func NewBlinkMDriver(a Connector, options ...func(Config)) *BlinkMDriver

NewBlinkMDriver creates a new BlinkMDriver.

Params: 

conn Connector - the Adaptor to use with this Driver

Optional params: 

i2c.WithBus(int):	bus to use with this driver
i2c.WithAddress(int):	address to use with this driver

func (*BlinkMDriver) Color 

func (b *BlinkMDriver) Color() (color []byte, err error)

Color returns an array with current rgb color

func (*BlinkMDriver) Connection 

func (b *BlinkMDriver) Connection() gobot.Connection

Connection returns the connection for the Driver

func (*BlinkMDriver) Fade 

func (b *BlinkMDriver) Fade(red byte, green byte, blue byte) (err error)

Fade removes color using r,g,b params

func (*BlinkMDriver) FirmwareVersion 

func (b *BlinkMDriver) FirmwareVersion() (version string, err error)

FirmwareVersion returns version with MAYOR.minor format

func (*BlinkMDriver) Halt 

func (b *BlinkMDriver) Halt() (err error)

Halt returns true if device is halted successfully

func (*BlinkMDriver) Name 

func (b *BlinkMDriver) Name() string

Name returns the Name for the Driver

func (*BlinkMDriver) Rgb 

func (b *BlinkMDriver) Rgb(red byte, green byte, blue byte) (err error)

Rgb sets color using r,g,b params

func (*BlinkMDriver) SetName 

func (b *BlinkMDriver) SetName(n string)

SetName sets the Name for the Driver

func (*BlinkMDriver) Start 

func (b *BlinkMDriver) Start() (err error)

Start starts the Driver up, and writes start command

type Config added in v1.2.0 

type Config interface {
	// WithBus sets which bus to use
	WithBus(bus int)

	// GetBusOrDefault gets which bus to use
	GetBusOrDefault(def int) int

	// WithAddress sets which address to use
	WithAddress(address int)

	// GetAddressOrDefault gets which address to use
	GetAddressOrDefault(def int) int
}

Config is the interface which describes how a Driver can specify optional I2C params such as which I2C bus it wants to use.

func NewConfig added in v1.2.0 

func NewConfig() Config

NewConfig returns a new I2c Config.

type Connection added in v1.2.0 

type Connection sysfs.I2cOperations

Connection is a connection to an I2C device with a specified address on a specific bus. Used as an alternative to the I2c interface. Implements sysfs.I2cOperations to talk to the device, wrapping the calls in SetAddress to always target the specified device. Provided by an Adaptor by implementing the I2cConnector interface.

type Connector added in v1.2.0 

type Connector interface {
	// GetConnection returns a connection to device at the specified address
	// and bus. Bus numbering starts at index 0, the range of valid buses is
	// platform specific.
	GetConnection(address int, bus int) (device Connection, err error)

	// GetDefaultBus returns the default I2C bus index
	GetDefaultBus() int
}

Connector lets Adaptors provide the interface for Drivers to get access to the I2C buses on platforms that support I2C.

type GroveAccelerometerDriver 

type GroveAccelerometerDriver struct {
	*MMA7660Driver
}

GroveAccelerometerDriver is a driver for the MMA7660 accelerometer

func NewGroveAccelerometerDriver 

func NewGroveAccelerometerDriver(a Connector, options ...func(Config)) *GroveAccelerometerDriver

NewGroveAccelerometerDriver creates a new driver with specified i2c interface Params: 

conn Connector - the Adaptor to use with this Driver

Optional params: 

i2c.WithBus(int):	bus to use with this driver
i2c.WithAddress(int):	address to use with this driver

type GroveLcdDriver 

type GroveLcdDriver struct {
	*JHD1313M1Driver
}

GroveLcdDriver is a driver for the Jhd1313m1 LCD display which has two i2c addreses, one belongs to a controller and the other controls solely the backlight. This module was tested with the Seed Grove LCD RGB Backlight v2.0 display which requires 5V to operate. http://www.seeedstudio.com/wiki/Grove_-_LCD_RGB_Backlight

func NewGroveLcdDriver 

func NewGroveLcdDriver(a Connector, options ...func(Config)) *GroveLcdDriver

NewGroveLcdDriver creates a new driver with specified i2c interface. Params: 

conn Connector - the Adaptor to use with this Driver

Optional params: 

i2c.WithBus(int):	bus to use with this driver
i2c.WithAddress(int):	address to use with this driver

type HMC6352Driver 

type HMC6352Driver struct {
	Config
	// contains filtered or unexported fields
}

HMC6352Driver is a Driver for a HMC6352 digital compass

func NewHMC6352Driver 

func NewHMC6352Driver(a Connector, options ...func(Config)) *HMC6352Driver

NewHMC6352Driver creates a new driver with specified i2c interface Params: 

conn Connector - the Adaptor to use with this Driver

Optional params: 

i2c.WithBus(int):	bus to use with this driver
i2c.WithAddress(int):	address to use with this driver

func (*HMC6352Driver) Connection 

func (h *HMC6352Driver) Connection() gobot.Connection

Connection returns the connection for this Driver

func (*HMC6352Driver) Halt 

func (h *HMC6352Driver) Halt() (err error)

Halt returns true if devices is halted successfully

func (*HMC6352Driver) Heading 

func (h *HMC6352Driver) Heading() (heading uint16, err error)

Heading returns the current heading

func (*HMC6352Driver) Name 

func (h *HMC6352Driver) Name() string

Name returns the name for this Driver

func (*HMC6352Driver) SetName 

func (h *HMC6352Driver) SetName(n string)

SetName sets the name for this Driver

func (*HMC6352Driver) Start 

func (h *HMC6352Driver) Start() (err error)

Start initializes the hmc6352

type JHD1313M1Driver 

type JHD1313M1Driver struct {
	Config
	// contains filtered or unexported fields
}

JHD1313M1Driver is a driver for the Jhd1313m1 LCD display which has two i2c addreses, one belongs to a controller and the other controls solely the backlight. This module was tested with the Seed Grove LCD RGB Backlight v2.0 display which requires 5V to operate. http://www.seeedstudio.com/wiki/Grove_-_LCD_RGB_Backlight

func NewJHD1313M1Driver 

func NewJHD1313M1Driver(a Connector, options ...func(Config)) *JHD1313M1Driver

NewJHD1313M1Driver creates a new driver with specified i2c interface. Params: 

conn Connector - the Adaptor to use with this Driver

Optional params: 

i2c.WithBus(int):	bus to use with this driver

func (*JHD1313M1Driver) Clear 

func (h *JHD1313M1Driver) Clear() error

Clear clears the text on the lCD display.

func (*JHD1313M1Driver) Connection 

func (h *JHD1313M1Driver) Connection() gobot.Connection

Connection returns the driver connection to the device.

func (*JHD1313M1Driver) Halt 

func (h *JHD1313M1Driver) Halt() error

Halt is a noop function.

func (*JHD1313M1Driver) Home 

func (h *JHD1313M1Driver) Home() error

Home sets the cursor to the origin position on the display.

func (*JHD1313M1Driver) Name 

func (h *JHD1313M1Driver) Name() string

Name returns the name the JHD1313M1 Driver was given when created.

func (*JHD1313M1Driver) Scroll 

func (h *JHD1313M1Driver) Scroll(leftToRight bool) error

func (*JHD1313M1Driver) SetCustomChar 

func (h *JHD1313M1Driver) SetCustomChar(pos int, charMap [8]byte) error

SetCustomChar sets one of the 8 CGRAM locations with a custom character. The custom character can be used by writing a byte of value 0 to 7. When you are using LCD as 5x8 dots in function set then you can define a total of 8 user defined patterns (1 Byte for each row and 8 rows for each pattern). Use http://www.8051projects.net/lcd-interfacing/lcd-custom-character.php to create your own characters. To use a custom character, write byte value of the custom character position as a string after having setup the custom character.

func (*JHD1313M1Driver) SetName 

func (h *JHD1313M1Driver) SetName(n string)

SetName sets the name for the JHD1313M1 Driver.

func (*JHD1313M1Driver) SetPosition 

func (h *JHD1313M1Driver) SetPosition(pos int) (err error)

SetPosition sets the cursor and the data display to pos. 0..15 are the positions in the first display line. 16..32 are the positions in the second display line.

func (*JHD1313M1Driver) SetRGB 

func (h *JHD1313M1Driver) SetRGB(r, g, b int) error

SetRGB sets the Red Green Blue value of backlit.

func (*JHD1313M1Driver) Start 

func (h *JHD1313M1Driver) Start() (err error)

Start starts the backlit and the screen and initializes the states.

func (*JHD1313M1Driver) Write 

func (h *JHD1313M1Driver) Write(message string) error

Write displays the passed message on the screen.

type L3GD20HDriver added in v1.1.0 

type L3GD20HDriver struct {
	Config
	// contains filtered or unexported fields
}

L3GD20HDriver is the gobot driver for the Adafruit Triple-Axis Gyroscope L3GD20H. Device datasheet: http://www.st.com/internet/com/TECHNICAL_RESOURCES/TECHNICAL_LITERATURE/DATASHEET/DM00036465.pdf

func NewL3GD20HDriver added in v1.1.0 

func NewL3GD20HDriver(c Connector, options ...func(Config)) *L3GD20HDriver

NewL3GD20HDriver creates a new Gobot driver for the L3GD20H I2C Triple-Axis Gyroscope.

Params: 

conn Connector - the Adaptor to use with this Driver

Optional params: 

i2c.WithBus(int):	bus to use with this driver
i2c.WithAddress(int):	address to use with this driver

func (*L3GD20HDriver) Connection added in v1.1.0 

func (d *L3GD20HDriver) Connection() gobot.Connection

Connection returns the connection of the device.

func (*L3GD20HDriver) Halt added in v1.1.0 

func (d *L3GD20HDriver) Halt() (err error)

Halt halts the device.

func (*L3GD20HDriver) Name added in v1.1.0 

func (d *L3GD20HDriver) Name() string

Name returns the name of the device.

func (*L3GD20HDriver) Scale added in v1.1.0 

func (d *L3GD20HDriver) Scale() L3GD20HScale

Scale returns the scale sensitivity of the device.

func (*L3GD20HDriver) SetName added in v1.1.0 

func (d *L3GD20HDriver) SetName(name string)

SetName sets the name of the device.

func (*L3GD20HDriver) SetScale added in v1.1.0 

func (d *L3GD20HDriver) SetScale(s L3GD20HScale)

SetScale sets the scale sensitivity of the device.

func (*L3GD20HDriver) Start added in v1.1.0 

func (d *L3GD20HDriver) Start() (err error)

Start initializes the device.

func (*L3GD20HDriver) XYZ added in v1.1.0 

func (d *L3GD20HDriver) XYZ() (x float32, y float32, z float32, err error)

XYZ returns the current change in degrees per second, for the 3 axis.

type L3GD20HScale added in v1.1.0 

type L3GD20HScale byte

L3GD20HScale is the scale sensitivity of degrees-per-second. 

const (
	// L3GD20HScale250dps is the 250 degress-per-second scale.
	L3GD20HScale250dps L3GD20HScale = 0x00
	// L3GD20HScale500dps is the 500 degress-per-second scale.
	L3GD20HScale500dps L3GD20HScale = 0x10
	// L3GD20HScale2000dps is the 2000 degress-per-second scale.
	L3GD20HScale2000dps L3GD20HScale = 0x30
)

type LIDARLiteDriver 

type LIDARLiteDriver struct {
	Config
	// contains filtered or unexported fields
}

LIDARLiteDriver is the Gobot driver for the LIDARLite I2C LIDAR device.

func NewLIDARLiteDriver 

func NewLIDARLiteDriver(a Connector, options ...func(Config)) *LIDARLiteDriver

NewLIDARLiteDriver creates a new driver for the LIDARLite I2C LIDAR device.

Params: 

conn Connector - the Adaptor to use with this Driver

Optional params: 

i2c.WithBus(int):	bus to use with this driver
i2c.WithAddress(int):	address to use with this driver

func (*LIDARLiteDriver) Connection 

func (h *LIDARLiteDriver) Connection() gobot.Connection

Connection returns the connection for the Driver

func (*LIDARLiteDriver) Distance 

func (h *LIDARLiteDriver) Distance() (distance int, err error)

Distance returns the current distance in cm

func (*LIDARLiteDriver) Halt 

func (h *LIDARLiteDriver) Halt() (err error)

Halt returns true if devices is halted successfully

func (*LIDARLiteDriver) Name 

func (h *LIDARLiteDriver) Name() string

Name returns the Name for the Driver

func (*LIDARLiteDriver) SetName 

func (h *LIDARLiteDriver) SetName(n string)

SetName sets the Name for the Driver

func (*LIDARLiteDriver) Start 

func (h *LIDARLiteDriver) Start() (err error)

Start initialized the LIDAR

type MCP23017Config 

type MCP23017Config struct {
	Bank   uint8
	Mirror uint8
	Seqop  uint8
	Disslw uint8
	Haen   uint8
	Odr    uint8
	Intpol uint8
}

MCP23017Config contains the device configuration for the IOCON register. These fields should only be set with values 0 or 1.

func (*MCP23017Config) GetUint8Value 

func (mc *MCP23017Config) GetUint8Value() uint8

GetUint8Value returns the configuration data as a packed value.

type MCP23017Driver 

type MCP23017Driver struct {
	Config
	MCPConf MCP23017Config
	gobot.Commander
	gobot.Eventer
	// contains filtered or unexported fields
}

MCP23017Driver contains the driver configuration parameters.

func NewMCP23017Driver 

func NewMCP23017Driver(a Connector, options ...func(Config)) *MCP23017Driver

NewMCP23017Driver creates a new Gobot Driver to the MCP23017 i2c port expander. Params: 

conn Connector - the Adaptor to use with this Driver

Optional params: 

i2c.WithBus(int):	bus to use with this driver
i2c.WithAddress(int):	address to use with this driver
i2c.WithMCP23017Bank(int):	MCP23017 bank to use with this driver
i2c.WithMCP23017Mirror(int):	MCP23017 mirror to use with this driver
i2c.WithMCP23017Seqop(int):	MCP23017 seqop to use with this driver
i2c.WithMCP23017Disslw(int):	MCP23017 disslw to use with this driver
i2c.WithMCP23017Haen(int):	MCP23017 haen to use with this driver
i2c.WithMCP23017Odr(int):	MCP23017 odr to use with this driver
i2c.WithMCP23017Intpol(int):	MCP23017 intpol to use with this driver

func (*MCP23017Driver) Connection 

func (m *MCP23017Driver) Connection() gobot.Connection

Connection returns the I2c connection.

func (*MCP23017Driver) Halt 

func (m *MCP23017Driver) Halt() (err error)

Halt stops the driver.

func (*MCP23017Driver) Name 

func (m *MCP23017Driver) Name() string

Name return the driver name.

func (*MCP23017Driver) PinMode 

func (m *MCP23017Driver) PinMode(pin, val uint8, portStr string) (err error)

PinMode set pin mode val (0 output 1 input) port (A or B).

func (*MCP23017Driver) ReadGPIO 

func (m *MCP23017Driver) ReadGPIO(pin uint8, portStr string) (val uint8, err error)

ReadGPIO reads a value from a given gpio pin (0-7) and a port (A or B).

func (*MCP23017Driver) SetGPIOPolarity 

func (m *MCP23017Driver) SetGPIOPolarity(pin uint8, val uint8, portStr string) (err error)

SetGPIOPolarity will change a given pin's polarity based on the value: val = 1 opposite logic state of the input pin. val = 0 same logic state of the input pin.

func (*MCP23017Driver) SetName 

func (m *MCP23017Driver) SetName(n string)

SetName set the driver name.

func (*MCP23017Driver) SetPullUp 

func (m *MCP23017Driver) SetPullUp(pin uint8, val uint8, portStr string) error

SetPullUp sets the pull up state of a given pin based on the value: val = 1 pull up enabled. val = 0 pull up disabled.

func (*MCP23017Driver) Start 

func (m *MCP23017Driver) Start() (err error)

Start writes the device configuration.

func (*MCP23017Driver) WriteGPIO 

func (m *MCP23017Driver) WriteGPIO(pin uint8, val uint8, portStr string) (err error)

WriteGPIO writes a value to a gpio pin (0-7) and a port (A or B).

type MMA7660Driver 

type MMA7660Driver struct {
	Config
	// contains filtered or unexported fields
}

func NewMMA7660Driver 

func NewMMA7660Driver(a Connector, options ...func(Config)) *MMA7660Driver

NewMMA7660Driver creates a new driver with specified i2c interface Params: 

conn Connector - the Adaptor to use with this Driver

Optional params: 

i2c.WithBus(int):	bus to use with this driver
i2c.WithAddress(int):	address to use with this driver

func (*MMA7660Driver) Acceleration 

func (h *MMA7660Driver) Acceleration(x, y, z float64) (ax, ay, az float64)

Acceleration returns the acceleration of the provided x, y, z

func (*MMA7660Driver) Connection 

func (h *MMA7660Driver) Connection() gobot.Connection

Connection returns the connection for the Driver

func (*MMA7660Driver) Halt 

func (h *MMA7660Driver) Halt() (err error)

Halt returns true if devices is halted successfully

func (*MMA7660Driver) Name 

func (h *MMA7660Driver) Name() string

Name returns the Name for the Driver

func (*MMA7660Driver) SetName 

func (h *MMA7660Driver) SetName(n string)

SetName sets the Name for the Driver

func (*MMA7660Driver) Start 

func (h *MMA7660Driver) Start() (err error)

Start initialized the mma7660

func (*MMA7660Driver) XYZ 

func (h *MMA7660Driver) XYZ() (x float64, y float64, z float64, err error)

XYZ returns the raw x,y and z axis from the mma7660

type MPL115A2Driver 

type MPL115A2Driver struct {
	Config
	gobot.Eventer
	A0  float32
	B1  float32
	B2  float32
	C12 float32
	// contains filtered or unexported fields
}

MPL115A2Driver is a Gobot Driver for the MPL115A2 I2C digitial pressure/temperature sensor.

func NewMPL115A2Driver 

func NewMPL115A2Driver(a Connector, options ...func(Config)) *MPL115A2Driver

NewMPL115A2Driver creates a new Gobot Driver for an MPL115A2 I2C Pressure/Temperature sensor.

Params: 

conn Connector - the Adaptor to use with this Driver

Optional params: 

i2c.WithBus(int):	bus to use with this driver
i2c.WithAddress(int):	address to use with this driver

func (*MPL115A2Driver) Connection 

func (h *MPL115A2Driver) Connection() gobot.Connection

Connection returns the Connection of the device.

func (*MPL115A2Driver) Halt 

func (h *MPL115A2Driver) Halt() (err error)

Halt returns true if devices is halted successfully

func (*MPL115A2Driver) Name 

func (h *MPL115A2Driver) Name() string

Name returns the name of the device.

func (*MPL115A2Driver) Pressure 

func (h *MPL115A2Driver) Pressure() (p float32)

Pressure fetches the latest data from the MPL115A2, and returns the pressure

func (*MPL115A2Driver) SetName 

func (h *MPL115A2Driver) SetName(n string)

SetName sets the name of the device.

func (*MPL115A2Driver) Start 

func (h *MPL115A2Driver) Start() (err error)

Start writes initialization bytes and reads from adaptor using specified interval to accelerometer andtemperature data

func (*MPL115A2Driver) Temperature 

func (h *MPL115A2Driver) Temperature() (t float32)

Temperature fetches the latest data from the MPL115A2, and returns the temperature

type MPU6050Driver 

type MPU6050Driver struct {
	Config

	Accelerometer ThreeDData
	Gyroscope     ThreeDData
	Temperature   int16
	gobot.Eventer
	// contains filtered or unexported fields
}

MPU6050Driver is a new Gobot Driver for an MPU6050 I2C Accelerometer/Gyroscope.

func NewMPU6050Driver 

func NewMPU6050Driver(a Connector, options ...func(Config)) *MPU6050Driver

NewMPU6050Driver creates a new Gobot Driver for an MPU6050 I2C Accelerometer/Gyroscope.

Params: 

conn Connector - the Adaptor to use with this Driver

Optional params: 

i2c.WithBus(int):	bus to use with this driver
i2c.WithAddress(int):	address to use with this driver

func (*MPU6050Driver) Connection 

func (h *MPU6050Driver) Connection() gobot.Connection

Connection returns the connection for the device.

func (*MPU6050Driver) GetData added in v1.2.0 

func (h *MPU6050Driver) GetData() (err error)

GetData fetches the latest data from the MPU6050

func (*MPU6050Driver) Halt 

func (h *MPU6050Driver) Halt() (err error)

Halt returns true if devices is halted successfully

func (*MPU6050Driver) Name 

func (h *MPU6050Driver) Name() string

Name returns the name of the device.

func (*MPU6050Driver) SetName 

func (h *MPU6050Driver) SetName(n string)

SetName sets the name of the device.

func (*MPU6050Driver) Start 

func (h *MPU6050Driver) Start() (err error)

Start writes initialization bytes to sensor

type SHT3xDriver added in v1.1.0 

type SHT3xDriver struct {
	Units string

	Config
	// contains filtered or unexported fields
}

SHT3xDriver is a Driver for a SHT3x humidity and temperature sensor

func NewSHT3xDriver added in v1.1.0 

func NewSHT3xDriver(a Connector, options ...func(Config)) *SHT3xDriver

NewSHT3xDriver creates a new driver with specified i2c interface Params: 

conn Connector - the Adaptor to use with this Driver

Optional params: 

i2c.WithBus(int):	bus to use with this driver
i2c.WithAddress(int):	address to use with this driver

func (*SHT3xDriver) Accuracy added in v1.1.0 

func (s *SHT3xDriver) Accuracy() byte

Accuracy returns the accuracy of the sampling

func (*SHT3xDriver) Connection added in v1.1.0 

func (s *SHT3xDriver) Connection() gobot.Connection

Connection returns the connection for this Driver

func (*SHT3xDriver) Halt added in v1.1.0 

func (s *SHT3xDriver) Halt() (err error)

Halt returns true if devices is halted successfully

func (*SHT3xDriver) Heater added in v1.1.0 

func (s *SHT3xDriver) Heater() (status bool, err error)

Heater returns true if the heater is enabled

func (*SHT3xDriver) Name added in v1.1.0 

func (s *SHT3xDriver) Name() string

Name returns the name for this Driver

func (*SHT3xDriver) Sample added in v1.1.0 

func (s *SHT3xDriver) Sample() (temp float32, rh float32, err error)

Sample returns the temperature in celsius and relative humidity for one sample

func (*SHT3xDriver) SerialNumber added in v1.1.0 

func (s *SHT3xDriver) SerialNumber() (sn uint32, err error)

SerialNumber returns the serial number of the chip

func (*SHT3xDriver) SetAccuracy added in v1.1.0 

func (s *SHT3xDriver) SetAccuracy(a byte) (err error)

SetAccuracy sets the accuracy of the sampling

func (*SHT3xDriver) SetAddress added in v1.1.0 

func (s *SHT3xDriver) SetAddress(address int)

SetAddress sets the address of the device

func (*SHT3xDriver) SetHeater added in v1.1.0 

func (s *SHT3xDriver) SetHeater(enabled bool) (err error)

SetHeater enables or disables the heater on the device

func (*SHT3xDriver) SetName added in v1.1.0 

func (s *SHT3xDriver) SetName(n string)

SetName sets the name for this Driver

func (*SHT3xDriver) Start added in v1.1.0 

func (s *SHT3xDriver) Start() (err error)

Start initializes the SHT3x

type ThreeDData 

type ThreeDData struct {
	X int16
	Y int16
	Z int16
}

type WiichuckDriver 

type WiichuckDriver struct {
	Config

	gobot.Eventer
	// contains filtered or unexported fields
}

func NewWiichuckDriver 

func NewWiichuckDriver(a Connector, options ...func(Config)) *WiichuckDriver

NewWiichuckDriver creates a WiichuckDriver with specified i2c interface.

Params: 

conn Connector - the Adaptor to use with this Driver

Optional params: 

i2c.WithBus(int):	bus to use with this driver
i2c.WithAddress(int):	address to use with this driver

func (*WiichuckDriver) Connection 

func (w *WiichuckDriver) Connection() gobot.Connection

Connection returns the connection for the device.

func (*WiichuckDriver) Halt 

func (w *WiichuckDriver) Halt() (err error)

Halt returns true if driver is halted successfully

func (*WiichuckDriver) Name 

func (w *WiichuckDriver) Name() string

Name returns the name of the device.

func (*WiichuckDriver) SetName 

func (w *WiichuckDriver) SetName(n string)

SetName sets the name of the device.

func (*WiichuckDriver) Start 

func (w *WiichuckDriver) Start() (err error)

Start initilizes i2c and reads from adaptor using specified interval to update with new value

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