mirror of https://github.com/periph/devices
You cannot select more than 25 topics
Topics must start with a letter or number, can include dashes ('-') and can be up to 35 characters long.
124 lines
3.1 KiB
Go
124 lines
3.1 KiB
Go
// Copyright 2018 The Periph Authors. All rights reserved.
|
|
// Use of this source code is governed under the Apache License, Version 2.0
|
|
// that can be found in the LICENSE file.
|
|
|
|
package epd_test
|
|
|
|
import (
|
|
"image"
|
|
"log"
|
|
|
|
"periph.io/x/devices/epd"
|
|
|
|
"periph.io/x/conn/spi/spireg"
|
|
|
|
"periph.io/x/devices/ssd1306/image1bit"
|
|
"periph.io/x/host"
|
|
)
|
|
|
|
func Example() {
|
|
// Make sure periph is initialized.
|
|
if _, err := host.Init(); err != nil {
|
|
log.Fatal(err)
|
|
}
|
|
|
|
// Use spireg SPI bus registry to find the first available SPI bus.
|
|
b, err := spireg.Open("")
|
|
if err != nil {
|
|
log.Fatal(err)
|
|
}
|
|
defer b.Close()
|
|
|
|
dev, err := epd.NewSPIHat(b, &epd.EPD2in13) // Display config and size
|
|
if err != nil {
|
|
log.Fatalf("failed to initialize epd: %v", err)
|
|
}
|
|
|
|
// Draw on it.
|
|
img := image1bit.NewVerticalLSB(dev.Bounds())
|
|
// Note: this code is commented out so periph does not depend on:
|
|
// "golang.org/x/image/font"
|
|
// "golang.org/x/image/font/basicfont"
|
|
// "golang.org/x/image/math/fixed"
|
|
//
|
|
// f := basicfont.Face7x13
|
|
// drawer := font.Drawer{
|
|
// Dst: img,
|
|
// Src: &image.Uniform{image1bit.On},
|
|
// Face: f,
|
|
// Dot: fixed.P(0, img.Bounds().Dy()-1-f.Descent),
|
|
// }
|
|
// drawer.DrawString("Hello from periph!")
|
|
|
|
if err := dev.Draw(dev.Bounds(), img, image.Point{}); err != nil {
|
|
log.Fatal(err)
|
|
}
|
|
dev.DisplayFrame() // After drawing on the display, you have to show the frame
|
|
}
|
|
|
|
func Example_other() {
|
|
// Make sure periph is initialized.
|
|
if _, err := host.Init(); err != nil {
|
|
log.Fatal(err)
|
|
}
|
|
|
|
// Use spireg SPI bus registry to find the first available SPI bus.
|
|
b, err := spireg.Open("")
|
|
if err != nil {
|
|
log.Fatal(err)
|
|
}
|
|
defer b.Close()
|
|
|
|
dev, err := epd.NewSPIHat(b, &epd.EPD2in13) // Display config and size
|
|
if err != nil {
|
|
log.Fatalf("failed to initialize epd: %v", err)
|
|
}
|
|
|
|
var img image.Image
|
|
// Note: this code is commented out so periph does not depend on:
|
|
// "github.com/fogleman/gg"
|
|
// "github.com/golang/freetype/truetype"
|
|
// "golang.org/x/image/font/gofont/goregular"
|
|
//
|
|
// bounds := dev.Bounds()
|
|
// w := bounds.Dx()
|
|
// h := bounds.Dy()
|
|
// dc := gg.NewContext(w, h)
|
|
// im, err := gg.LoadPNG("gopher.png")
|
|
// if err != nil {
|
|
// panic(err)
|
|
// }
|
|
// dc.SetRGB(1, 1, 1)
|
|
// dc.Clear()
|
|
// dc.SetRGB(0, 0, 0)
|
|
// dc.Rotate(gg.Radians(90))
|
|
// dc.Translate(0.0, -float64(h/2))
|
|
// font, err := truetype.Parse(goregular.TTF)
|
|
// if err != nil {
|
|
// panic(err)
|
|
// }
|
|
// face := truetype.NewFace(font, &truetype.Options{
|
|
// Size: 16,
|
|
// })
|
|
// dc.SetFontFace(face)
|
|
// text := "Hello from periph!"
|
|
// tw, th := dc.MeasureString(text)
|
|
// dc.DrawImage(im, 120, 30)
|
|
// padding := 8.0
|
|
// dc.DrawRoundedRectangle(padding*2, padding*2, tw+padding*2, th+padding, 10)
|
|
// dc.Stroke()
|
|
// dc.DrawString(text, padding*3, padding*2+th)
|
|
// for i := 0; i < 10; i++ {
|
|
// dc.DrawCircle(float64(30+(10*i)), 100, 5)
|
|
// }
|
|
// for i := 0; i < 10; i++ {
|
|
// dc.DrawRectangle(float64(30+(10*i)), 80, 5, 5)
|
|
// }
|
|
// dc.Fill()
|
|
// img = dc.Image()
|
|
if err := dev.Draw(dev.Bounds(), img, image.Point{}); err != nil {
|
|
log.Fatal(err)
|
|
}
|
|
dev.DisplayFrame() // After drawing on the display, you have to show the frame
|
|
}
|