display

type Config struct {
	// Width of the display in pixels.
	Width int

	// Height of the display in pixels.
	Height int

	// Rotation of the display.
	Rotation Rotation

	// UseMono sets 1-color monochrome mode on displays that support grayscale.
	UseMono bool

	// Reset pin
	Reset gpio.PinOut

	// Backlight pin
	Backlight gpio.PinOut
}

type Conn interface {
	String() string

	// Close the connection.
	Close() error

	// Reset sets the reset pin to the provided level.
	Reset(gpio.Level) error

	// Command sends a command byte with optional arguments.
	Command(byte, ...byte) error

	// Data sends data bytes.
	Data(...byte) error

	// Interface is the underlying interface.
	Interface() interface{}
}

type Display interface {
	draw.Image

	// String gives a description of the display.
	String() string

	// Close the display driver.
	Close() error

	// Clear the display buffer.
	Clear()

	// Fill the display buffer with a single color.
	Fill(color.Color)

	// Show toggles the display on or off.
	Show(bool) error

	// SetContrast adjusts the contrast level.
	SetContrast(level uint8) error

	// SetRotation adjusts the pixel rotation.
	SetRotation(Rotation) error

	// Refresh redraws the display.
	Refresh() error
}

type I2CConfig struct {
	// Device is the I²C device, use -1 to use the first available device.
	Device int

	// Addr is the I²C address.
	Addr uint8

	// Reset pin.
	Reset gpio.PinOut
}

type InvalidPin struct {
	Name string
}

type Parallel interface {
	Conn
}

type ParallelConfig struct {
	// Data pins.
	D0, D1, D2, D3, D4, D5, D6, D7 gpio.PinOut

	// Write pin.
	Write gpio.PinOut

	// Ready pin.
	Ready gpio.PinIn

	// UpdateFrequency is the maximum update frequency.
	UpdateFrequency physic.Frequency
}

type Rotation uint8

type SPI interface {
	Conn

	// SetDataLow changes the data/command direction behaviour.
	SetDataLow(bool)

	// SetMode requests a SPI mode.
	SetMode(mode conn.SPIMode) error

	// SetMaxSpeed requests a SPI speed.
	SetMaxSpeed(hz int) error
}

type SPIConfig struct {
	Bus       int
	Device    int
	Mode      uint8
	SpeedHz   uint32
	DataLow   bool
	BatchSize uint
	Reset     gpio.PinOut
	DC        gpio.PinOut
	CE        gpio.PinOut
}