spi

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 Go to latest Published: May 22, 2019 License: Apache-2.0 Imports: 12 Imported by: 0

README

SPI

This package provides drivers for spi devices.

It currently must be used along with platforms such as the Raspberry Pi and Beaglebone Black that have adaptors that implement the needed SPI interface.

The SPI implementation uses the awesome periph.io which currently only works on Linux systems.

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 spi Devices are currently supported:

  • APA102 Programmable LEDs
  • MCP3002 Analog/Digital Converter
  • MCP3004 Analog/Digital Converter
  • MCP3008 Analog/Digital Converter
  • MCP3202 Analog/Digital Converter
  • MCP3204 Analog/Digital Converter
  • MCP3208 Analog/Digital Converter
  • MCP3304 Analog/Digital Converter
  • GoPiGo3 Robot

Drivers wanted! :)

The following spi Adaptors are currently supported:

  • Raspberry Pi

Adaptors wanted too!

Documentation

Overview

Package spi provides Gobot drivers for spi devices. Uses periph.io for spi Installing: 

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

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

Index

Constants

View Source 
const MCP3002DriverMaxChannel = 2

MCP3002DriverMaxChannel is the number of channels of this A/D converter.

View Source 
const MCP3004DriverMaxChannel = 3

MCP3004DriverMaxChannel is the number of channels of this A/D converter.

View Source 
const MCP3008DriverMaxChannel = 8

MCP3008DriverMaxChannel is the number of channels of this A/D converter.

View Source 
const MCP3202DriverMaxChannel = 2

MCP3202DriverMaxChannel is the number of channels of this A/D converter.

View Source 
const MCP3204DriverMaxChannel = 4

MCP3204DriverMaxChannel is the number of channels of this A/D converter.

View Source 
const MCP3208DriverMaxChannel = 8

MCP3208DriverMaxChannel is the number of channels of this A/D converter.

View Source 
const MCP3304DriverMaxChannel = 8

MCP3304DriverMaxChannel is the number of channels of this A/D converter.

View Source 
const (
	// NotInitialized is the initial value for a bus/chip
	NotInitialized = -1
)

Variables

This section is empty.

Functions

func WithBits added in v1.12.0 

func WithBits(bits int) func(Config)

WithBits sets how many bits to use as a optional param.

func WithBus 

func WithBus(bus int) func(Config)

WithBus sets which bus to use as a optional param.

func WithChip added in v1.12.0 

func WithChip(chip int) func(Config)

WithChip sets which chip to use as a optional param.

func WithDCPin added in v1.12.0 

func WithDCPin(val string) func(Config)

WithDCPin option sets the SSD1306Driver DC Pin option.

func WithDisplayHeight added in v1.12.0 

func WithDisplayHeight(val int) func(Config)

WithDisplayHeight option sets the SSD1306Driver DisplayHeight option.

func WithDisplayWidth added in v1.12.0 

func WithDisplayWidth(val int) func(Config)

WithDisplayWidth option sets the SSD1306Driver DisplayWidth option.

func WithExternalVCC added in v1.12.0 

func WithExternalVCC(val bool) func(Config)

WithExternalVCC option sets the SSD1306Driver external vcc option.

func WithMode added in v1.12.0 

func WithMode(mode int) func(Config)

WithMode sets which mode to use as a optional param.

func WithRstPin added in v1.12.0 

func WithRstPin(val string) func(Config)

WithRstPin option sets the SSD1306Driver RST pin option.

func WithSpeed added in v1.12.0 

func WithSpeed(speed int64) func(Config)

WithSpeed sets what speed to use as a optional param.

Types

type APA102Driver added in v1.8.0 

type APA102Driver struct {
	Config
	gobot.Commander
	// contains filtered or unexported fields
}

APA102Driver is a driver for the APA102 programmable RGB LEDs

func NewAPA102Driver added in v1.8.0 

func NewAPA102Driver(a Connector, count int, options ...func(Config)) *APA102Driver

NewAPA102Driver creates a new Gobot Driver for APA102 RGB LEDs.

Params: 

     a *Adaptor - the Adaptor to use with this Driver
		count int - how many LEDs are in the array controlled by this driver

Optional params: 

 spi.WithBus(int):    	bus to use with this driver
	spi.WithChip(int):    	chip to use with this driver
 spi.WithMode(int):    	mode to use with this driver
 spi.WithBits(int):    	number of bits to use with this driver
 spi.WithSpeed(int64):   speed in Hz to use with this driver

func (*APA102Driver) Connection added in v1.8.0 

func (d *APA102Driver) Connection() gobot.Connection

Connection returns the Connection of the device.

func (*APA102Driver) Draw added in v1.8.0 

func (d *APA102Driver) Draw() error

Draw displays the RGBA values set on the actual LED strip.

func (*APA102Driver) Halt added in v1.8.0 

func (d *APA102Driver) Halt() (err error)

Halt stops the driver.

func (*APA102Driver) Name added in v1.8.0 

func (d *APA102Driver) Name() string

Name returns the name of the device.

func (*APA102Driver) SetName added in v1.8.0 

func (d *APA102Driver) SetName(n string)

SetName sets the name of the device.

func (*APA102Driver) SetRGBA added in v1.8.0 

func (d *APA102Driver) SetRGBA(i int, v color.RGBA)

SetRGBA sets the ith LED's color to the given RGBA value. A subsequent call to Draw is required to transmit values to the LED strip.

func (*APA102Driver) Start added in v1.8.0 

func (d *APA102Driver) Start() (err error)

Start initializes the driver.

type Config 

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

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

	// WithChip sets which chip to use
	WithChip(chip int)

	// GetChipOrDefault gets which chip to use
	GetChipOrDefault(def int) int

	// WithMode sets which mode to use
	WithMode(mode int)

	// GetModeOrDefault gets which mode to use
	GetModeOrDefault(def int) int

	// WithBIts sets how many bits to use
	WithBits(bits int)

	// GetBitsOrDefault gets how many bits to use
	GetBitsOrDefault(def int) int

	// WithSpeed sets which speed to use (in Hz)
	WithSpeed(speed int64)

	// GetSpeedOrDefault gets which speed to use (in Hz)
	GetSpeedOrDefault(def int64) int64
}

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

func NewConfig 

func NewConfig() Config

NewConfig returns a new SPI Config.

type Connection 

type Connection Operations

Connection is a connection to a SPI device with a specific bus/chip. Provided by an Adaptor, usually just by calling the spi package's GetSpiConnection() function.

func GetSpiConnection added in v1.12.0 

func GetSpiConnection(busNum, chipNum, mode, bits int, maxSpeed int64) (Connection, error)

GetSpiConnection is a helper to return a SPI device.

type Connector 

type Connector interface {
	// GetSpiConnection returns a connection to a SPI device at the specified bus and chip.
	// Bus numbering starts at index 0, the range of valid buses is
	// platform specific. Same with chip numbering.
	GetSpiConnection(busNum, chip, mode, bits int, maxSpeed int64) (device Connection, err error)

	// GetSpiDefaultBus returns the default SPI bus index
	GetSpiDefaultBus() int

	// GetSpiDefaultChip returns the default SPI chip index
	GetSpiDefaultChip() int

	// GetDefaultMode returns the default SPI mode (0/1/2/3)
	GetSpiDefaultMode() int

	// GetDefaultMode returns the default SPI number of bits (8)
	GetSpiDefaultBits() int

	// GetSpiDefaultMaxSpeed returns the max SPI speed
	GetSpiDefaultMaxSpeed() int64
}

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

type DisplayBuffer added in v1.12.0 

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

DisplayBuffer represents the display buffer intermediate memory

func NewDisplayBuffer added in v1.12.0 

func NewDisplayBuffer(width, height, pageSize int) *DisplayBuffer

NewDisplayBuffer creates a new DisplayBuffer

func (*DisplayBuffer) Clear added in v1.12.0 

func (d *DisplayBuffer) Clear()

Clear the contents of the display buffer

func (*DisplayBuffer) Set added in v1.12.0 

func (d *DisplayBuffer) Set(buf []byte)

Set sets the display buffer with the given buffer

func (*DisplayBuffer) SetPixel added in v1.12.0 

func (d *DisplayBuffer) SetPixel(x, y, c int)

SetPixel sets the x, y pixel with c color

func (*DisplayBuffer) Size added in v1.12.0 

func (d *DisplayBuffer) Size() int

Size returns the memory size of the display buffer

type MCP3002Driver added in v1.8.0 

type MCP3002Driver struct {
	Config
	gobot.Commander
	// contains filtered or unexported fields
}

MCP3002Driver is a driver for the MCP3002 A/D converter.

func NewMCP3002Driver added in v1.8.0 

func NewMCP3002Driver(a Connector, options ...func(Config)) *MCP3002Driver

NewMCP3002Driver creates a new Gobot Driver for MCP3002 A/D converter

Params: 

a *Adaptor - the Adaptor to use with this Driver

Optional params: 

 spi.WithBus(int):    	bus to use with this driver
	spi.WithChip(int):    	chip to use with this driver
 spi.WithMode(int):    	mode to use with this driver
 spi.WithBits(int):    	number of bits to use with this driver
 spi.WithSpeed(int64):   speed in Hz to use with this driver

func (*MCP3002Driver) AnalogRead added in v1.8.0 

func (d *MCP3002Driver) AnalogRead(pin string) (value int, err error)

AnalogRead returns value from analog reading of specified pin

func (*MCP3002Driver) Connection added in v1.8.0 

func (d *MCP3002Driver) Connection() gobot.Connection

Connection returns the Connection of the device.

func (*MCP3002Driver) Halt added in v1.8.0 

func (d *MCP3002Driver) Halt() (err error)

Halt stops the driver.

func (*MCP3002Driver) Name added in v1.8.0 

func (d *MCP3002Driver) Name() string

Name returns the name of the device.

func (*MCP3002Driver) Read added in v1.8.0 

func (d *MCP3002Driver) Read(channel int) (result int, err error)

Read reads the current analog data for the desired channel.

func (*MCP3002Driver) SetName added in v1.8.0 

func (d *MCP3002Driver) SetName(n string)

SetName sets the name of the device.

func (*MCP3002Driver) Start added in v1.8.0 

func (d *MCP3002Driver) Start() (err error)

Start initializes the driver.

type MCP3004Driver added in v1.8.0 

type MCP3004Driver struct {
	Config
	gobot.Commander
	// contains filtered or unexported fields
}

MCP3004Driver is a driver for the MCP3008 A/D converter.

func NewMCP3004Driver added in v1.8.0 

func NewMCP3004Driver(a Connector, options ...func(Config)) *MCP3004Driver

NewMCP3004Driver creates a new Gobot Driver for MCP3004 A/D converter

Params: 

a *Adaptor - the Adaptor to use with this Driver

Optional params: 

 spi.WithBus(int):    	bus to use with this driver
	spi.WithChip(int):    	chip to use with this driver
 spi.WithMode(int):    	mode to use with this driver
 spi.WithBits(int):    	number of bits to use with this driver
 spi.WithSpeed(int64):   speed in Hz to use with this driver

func (*MCP3004Driver) AnalogRead added in v1.8.0 

func (d *MCP3004Driver) AnalogRead(pin string) (value int, err error)

AnalogRead returns value from analog reading of specified pin

func (*MCP3004Driver) Connection added in v1.8.0 

func (d *MCP3004Driver) Connection() gobot.Connection

Connection returns the Connection of the device.

func (*MCP3004Driver) Halt added in v1.8.0 

func (d *MCP3004Driver) Halt() (err error)

Halt stops the driver.

func (*MCP3004Driver) Name added in v1.8.0 

func (d *MCP3004Driver) Name() string

Name returns the name of the device.

func (*MCP3004Driver) Read added in v1.8.0 

func (d *MCP3004Driver) Read(channel int) (result int, err error)

Read reads the current analog data for the desired channel.

func (*MCP3004Driver) SetName added in v1.8.0 

func (d *MCP3004Driver) SetName(n string)

SetName sets the name of the device.

func (*MCP3004Driver) Start added in v1.8.0 

func (d *MCP3004Driver) Start() (err error)

Start initializes the driver.

type MCP3008Driver added in v1.8.0 

type MCP3008Driver struct {
	Config
	gobot.Commander
	// contains filtered or unexported fields
}

MCP3008Driver is a driver for the MCP3008 A/D converter.

func NewMCP3008Driver added in v1.8.0 

func NewMCP3008Driver(a Connector, options ...func(Config)) *MCP3008Driver

NewMCP3008Driver creates a new Gobot Driver for MCP3008Driver A/D converter

Params: 

a *Adaptor - the Adaptor to use with this Driver

Optional params: 

 spi.WithBus(int):    	bus to use with this driver
	spi.WithChip(int):    	chip to use with this driver
 spi.WithMode(int):    	mode to use with this driver
 spi.WithBits(int):    	number of bits to use with this driver
 spi.WithSpeed(int64):   speed in Hz to use with this driver

func (*MCP3008Driver) AnalogRead added in v1.8.0 

func (d *MCP3008Driver) AnalogRead(pin string) (value int, err error)

AnalogRead returns value from analog reading of specified pin

func (*MCP3008Driver) Connection added in v1.8.0 

func (d *MCP3008Driver) Connection() gobot.Connection

Connection returns the Connection of the device.

func (*MCP3008Driver) Halt added in v1.8.0 

func (d *MCP3008Driver) Halt() (err error)

Halt stops the driver.

func (*MCP3008Driver) Name added in v1.8.0 

func (d *MCP3008Driver) Name() string

Name returns the name of the device.

func (*MCP3008Driver) Read added in v1.8.0 

func (d *MCP3008Driver) Read(channel int) (result int, err error)

Read reads the current analog data for the desired channel.

func (*MCP3008Driver) SetName added in v1.8.0 

func (d *MCP3008Driver) SetName(n string)

SetName sets the name of the device.

func (*MCP3008Driver) Start added in v1.8.0 

func (d *MCP3008Driver) Start() (err error)

Start initializes the driver.

type MCP3202Driver added in v1.8.0 

type MCP3202Driver struct {
	Config
	gobot.Commander
	// contains filtered or unexported fields
}

MCP3202Driver is a driver for the MCP3202 A/D converter.

func NewMCP3202Driver added in v1.8.0 

func NewMCP3202Driver(a Connector, options ...func(Config)) *MCP3202Driver

NewMCP3202Driver creates a new Gobot Driver for MCP3202Driver A/D converter

Params: 

a *Adaptor - the Adaptor to use with this Driver

Optional params: 

 spi.WithBus(int):    	bus to use with this driver
	spi.WithChip(int):    	chip to use with this driver
 spi.WithMode(int):    	mode to use with this driver
 spi.WithBits(int):    	number of bits to use with this driver
 spi.WithSpeed(int64):   speed in Hz to use with this driver

func (*MCP3202Driver) AnalogRead added in v1.8.0 

func (d *MCP3202Driver) AnalogRead(pin string) (value int, err error)

AnalogRead returns value from analog reading of specified pin, scaled to 0-1023 value.

func (*MCP3202Driver) Connection added in v1.8.0 

func (d *MCP3202Driver) Connection() gobot.Connection

Connection returns the Connection of the device.

func (*MCP3202Driver) Halt added in v1.8.0 

func (d *MCP3202Driver) Halt() (err error)

Halt stops the driver.

func (*MCP3202Driver) Name added in v1.8.0 

func (d *MCP3202Driver) Name() string

Name returns the name of the device.

func (*MCP3202Driver) Read added in v1.8.0 

func (d *MCP3202Driver) Read(channel int) (result int, err error)

Read reads the current analog data for the desired channel.

func (*MCP3202Driver) SetName added in v1.8.0 

func (d *MCP3202Driver) SetName(n string)

SetName sets the name of the device.

func (*MCP3202Driver) Start added in v1.8.0 

func (d *MCP3202Driver) Start() (err error)

Start initializes the driver.

type MCP3204Driver added in v1.8.0 

type MCP3204Driver struct {
	Config
	gobot.Commander
	// contains filtered or unexported fields
}

MCP3204Driver is a driver for the MCP3204 A/D converter.

func NewMCP3204Driver added in v1.8.0 

func NewMCP3204Driver(a Connector, options ...func(Config)) *MCP3204Driver

NewMCP3204Driver creates a new Gobot Driver for MCP3204Driver A/D converter

Params: 

a *Adaptor - the Adaptor to use with this Driver

Optional params: 

 spi.WithBus(int):    	bus to use with this driver
	spi.WithChip(int):    	chip to use with this driver
 spi.WithMode(int):    	mode to use with this driver
 spi.WithBits(int):    	number of bits to use with this driver
 spi.WithSpeed(int64):   speed in Hz to use with this driver

func (*MCP3204Driver) AnalogRead added in v1.8.0 

func (d *MCP3204Driver) AnalogRead(pin string) (value int, err error)

AnalogRead returns value from analog reading of specified pin, scaled to 0-1023 value.

func (*MCP3204Driver) Connection added in v1.8.0 

func (d *MCP3204Driver) Connection() gobot.Connection

Connection returns the Connection of the device.

func (*MCP3204Driver) Halt added in v1.8.0 

func (d *MCP3204Driver) Halt() (err error)

Halt stops the driver.

func (*MCP3204Driver) Name added in v1.8.0 

func (d *MCP3204Driver) Name() string

Name returns the name of the device.

func (*MCP3204Driver) Read added in v1.8.0 

func (d *MCP3204Driver) Read(channel int) (result int, err error)

Read reads the current analog data for the desired channel.

func (*MCP3204Driver) SetName added in v1.8.0 

func (d *MCP3204Driver) SetName(n string)

SetName sets the name of the device.

func (*MCP3204Driver) Start added in v1.8.0 

func (d *MCP3204Driver) Start() (err error)

Start initializes the driver.

type MCP3208Driver added in v1.8.0 

type MCP3208Driver struct {
	Config
	gobot.Commander
	// contains filtered or unexported fields
}

MCP3208Driver is a driver for the MCP3208 A/D converter.

func NewMCP3208Driver added in v1.8.0 

func NewMCP3208Driver(a Connector, options ...func(Config)) *MCP3208Driver

NewMCP3208Driver creates a new Gobot Driver for MCP3208Driver A/D converter

Params: 

a *Adaptor - the Adaptor to use with this Driver

Optional params: 

 spi.WithBus(int):    	bus to use with this driver
	spi.WithChip(int):    	chip to use with this driver
 spi.WithMode(int):    	mode to use with this driver
 spi.WithBits(int):    	number of bits to use with this driver
 spi.WithSpeed(int64):   speed in Hz to use with this driver

func (*MCP3208Driver) AnalogRead added in v1.8.0 

func (d *MCP3208Driver) AnalogRead(pin string) (value int, err error)

AnalogRead returns value from analog reading of specified pin, scaled to 0-1023 value.

func (*MCP3208Driver) Connection added in v1.8.0 

func (d *MCP3208Driver) Connection() gobot.Connection

Connection returns the Connection of the device.

func (*MCP3208Driver) Halt added in v1.8.0 

func (d *MCP3208Driver) Halt() (err error)

Halt stops the driver.

func (*MCP3208Driver) Name added in v1.8.0 

func (d *MCP3208Driver) Name() string

Name returns the name of the device.

func (*MCP3208Driver) Read added in v1.8.0 

func (d *MCP3208Driver) Read(channel int) (result int, err error)

Read reads the current analog data for the desired channel.

func (*MCP3208Driver) SetName added in v1.8.0 

func (d *MCP3208Driver) SetName(n string)

SetName sets the name of the device.

func (*MCP3208Driver) Start added in v1.8.0 

func (d *MCP3208Driver) Start() (err error)

Start initializes the driver.

type MCP3304Driver added in v1.8.0 

type MCP3304Driver struct {
	Config
	gobot.Commander
	// contains filtered or unexported fields
}

MCP3304Driver is a driver for the MCP3304 A/D converter.

func NewMCP3304Driver added in v1.8.0 

func NewMCP3304Driver(a Connector, options ...func(Config)) *MCP3304Driver

NewMCP3304Driver creates a new Gobot Driver for MCP3304Driver A/D converter

Params: 

a *Adaptor - the Adaptor to use with this Driver

Optional params: 

 spi.WithBus(int):    	bus to use with this driver
	spi.WithChip(int):    	chip to use with this driver
 spi.WithMode(int):    	mode to use with this driver
 spi.WithBits(int):    	number of bits to use with this driver
 spi.WithSpeed(int64):   speed in Hz to use with this driver

func (*MCP3304Driver) AnalogRead added in v1.8.0 

func (d *MCP3304Driver) AnalogRead(pin string) (value int, err error)

AnalogRead returns value from analog reading of specified pin, scaled to 0-1023 value.

func (*MCP3304Driver) Connection added in v1.8.0 

func (d *MCP3304Driver) Connection() gobot.Connection

Connection returns the Connection of the device.

func (*MCP3304Driver) Halt added in v1.8.0 

func (d *MCP3304Driver) Halt() (err error)

Halt stops the driver.

func (*MCP3304Driver) Name added in v1.8.0 

func (d *MCP3304Driver) Name() string

Name returns the name of the device.

func (*MCP3304Driver) Read added in v1.8.0 

func (d *MCP3304Driver) Read(channel int) (result int, err error)

Read reads the current analog data for the desired channel.

func (*MCP3304Driver) SetName added in v1.8.0 

func (d *MCP3304Driver) SetName(n string)

SetName sets the name of the device.

func (*MCP3304Driver) Start added in v1.8.0 

func (d *MCP3304Driver) Start() (err error)

Start initializes the driver.

type Operations added in v1.12.0 

type Operations interface {
	Close() error
	Tx(w, r []byte) error
}

Operations are the wrappers around the actual functions used by the SPI device interface

type SSD1306Driver added in v1.12.0 

type SSD1306Driver struct {
	DisplayWidth  int
	DisplayHeight int
	DCPin         string
	RSTPin        string
	ExternalVcc   bool

	Config
	gobot.Commander
	// contains filtered or unexported fields
}

SSD1306Driver is a Gobot Driver for a SSD1306 Display

func NewSSD1306Driver added in v1.12.0 

func NewSSD1306Driver(a gobot.Adaptor, options ...func(Config)) *SSD1306Driver

NewSSD1306Driver creates a new SSD1306Driver.

Params: 

conn Connector - the Adaptor to use with this Driver

Optional params: 

 spi.WithBus(int):    		bus to use with this driver
	spi.WithChip(int):    		chip to use with this driver
 spi.WithMode(int):    		mode to use with this driver
 spi.WithBits(int):    		number of bits to use with this driver
 spi.WithSpeed(int64):   	speed in Hz to use with this driver
 spi.WithDisplayWidth(int): 	width of display (defaults to 128)
 spi.WithDisplayHeight(int): height of display (defaults to 64)
 spi.WithDCPin(string): 		gpio pin number connected to dc pin on display (defaults to "16")
 spi.WithRstPin(string): 	gpio pin number connected to rst pin on display (defaults to "18")
 spi.WithExternalVCC(bool): 	set to true if using external vcc (defaults to false)

func (*SSD1306Driver) Clear added in v1.12.0 

func (s *SSD1306Driver) Clear() (err error)

Clear clears the display buffer.

func (*SSD1306Driver) Connection added in v1.12.0 

func (s *SSD1306Driver) Connection() gobot.Connection

Connection returns the connection for the Driver

func (*SSD1306Driver) Display added in v1.12.0 

func (s *SSD1306Driver) Display() (err error)

Display sends the memory buffer to the display.

func (*SSD1306Driver) Halt added in v1.12.0 

func (s *SSD1306Driver) Halt() (err error)

Halt returns true if device is halted successfully.

func (*SSD1306Driver) Name added in v1.12.0 

func (s *SSD1306Driver) Name() string

Name returns the Name for the Driver

func (*SSD1306Driver) Off added in v1.12.0 

func (s *SSD1306Driver) Off() (err error)

Off turns off the display.

func (*SSD1306Driver) On added in v1.12.0 

func (s *SSD1306Driver) On() (err error)

On turns on the display.

func (*SSD1306Driver) Reset added in v1.12.0 

func (s *SSD1306Driver) Reset() (err error)

Reset re-initializes the device to a clean state.

func (*SSD1306Driver) Set added in v1.12.0 

func (s *SSD1306Driver) Set(x, y, c int)

Set sets a pixel in the display buffer.

func (*SSD1306Driver) SetBufferAndDisplay added in v1.12.0 

func (s *SSD1306Driver) SetBufferAndDisplay(buf []byte) (err error)

SetBufferAndDisplay sets the display buffer with the given buffer and displays the image.

func (*SSD1306Driver) SetContrast added in v1.12.0 

func (s *SSD1306Driver) SetContrast(contrast byte) (err error)

SetContrast sets the display contrast (0-255).

func (*SSD1306Driver) SetName added in v1.12.0 

func (s *SSD1306Driver) SetName(n string)

SetName sets the Name for the Driver

func (*SSD1306Driver) ShowImage added in v1.12.0 

func (s *SSD1306Driver) ShowImage(img image.Image) (err error)

ShowImage takes a standard Go image and shows it on the display in monochrome.

func (*SSD1306Driver) Start added in v1.12.0 

func (s *SSD1306Driver) Start() (err error)

Start sets up the needed connection, and initialized the device.

type SpiConnection 

type SpiConnection struct {
	Operations
	// contains filtered or unexported fields
}

SpiConnection is the implementation of the SPI interface using the periph.io sysfs implementation for Linux.

func NewConnection 

func NewConnection(port xspi.PortCloser, conn xspi.Conn) (connection *SpiConnection)

NewConnection creates and returns a new connection to a specific spi device on a bus/chip using the periph.io interface.

func (*SpiConnection) Close 

func (c *SpiConnection) Close() error

Close the SPI connection.

func (*SpiConnection) Tx 

func (c *SpiConnection) Tx(w, r []byte) error

Tx uses the SPI device to send/receive data.

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