unicornhd

Documentation

Overview

Package unicornhd implements interfacing code to Pimoroni's Unicorn HD hat.

Index

• type Dev
  • func NewUnicornhd(port spi.Port) (*Dev, error)
  • func (device *Dev) Bounds() image.Rectangle
  • func (device *Dev) ColorModel() color.Model
  • func (device *Dev) Draw(dstRect image.Rectangle, src image.Image, srcPts image.Point) error
  • func (device *Dev) Halt() error
  • func (device *Dev) String() string

Types

type Dev

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

Dev represents a Unicorn HAT HD (https://shop.pimoroni.com/products/unicorn-hat-hd) connected over a SPI port.

func NewUnicornhd

func NewUnicornhd(port spi.Port) (*Dev, error)

New returns a unicornHD driver that communicates over SPI.

The SPI port speed must be 9MHz and the SPI mode, 0, as in the python example library.

func (*Dev) Bounds

func (device *Dev) Bounds() image.Rectangle

Bounds implements devices.Display.

Min is guaranteed to be {0, 0}.

func (*Dev) ColorModel

func (device *Dev) ColorModel() color.Model

ColorModel implements devices.Display. There's no surprise, it is color.RGBAModel.

func (*Dev) Draw

func (device *Dev) Draw(dstRect image.Rectangle, src image.Image, srcPts image.Point) error

Draw implements devices.Display.

Using something else than image.NRGBA is 10x slower. When using image.NRGBA, the alpha channel is ignored.

func (*Dev) Halt

func (device *Dev) Halt() error

Halting the unicorn HD sets all the pixels to black. Error is always nil.

func (*Dev) String

func (device *Dev) String() string

Implement display.Drawer

Returns a string with the driver name and the width and height of the display.