display-test/display/ssd1306.go

package display

import (
	"context"
	"fmt"
	"image"
	"log"

	"periph.io/x/conn/v3/i2c"
	"periph.io/x/conn/v3/i2c/i2creg"
	"periph.io/x/devices/v3/ssd1306"
	"periph.io/x/host/v3"
)

type displaySsd1306 struct {
	logger *log.Logger

	bus i2c.BusCloser
	dev *ssd1306.Dev
	img *image.Gray
}

func newSsd1306(logger *log.Logger) (Display, error) {
	if _, err := host.Init(); err != nil {
		return nil, fmt.Errorf("drivers init: %w(may be i2c is disabled)", err)
	}

	// Setup device
	bus, err := i2creg.Open("")
	if err != nil {
		return nil, fmt.Errorf("open i2c bus: %w", err)
	}
	opts := ssd1306.Opts{
		W:             128,
		H:             32,
		Rotated:       false,
		Sequential:    true,
		SwapTopBottom: false,
	}
	dev, err := ssd1306.NewI2C(bus, &opts)
	if err != nil {
		return nil, fmt.Errorf("create i2c: %w", err)
	}

	return &displaySsd1306{
		logger: logger,
		bus:    bus,
		dev:    dev,
	}, nil
}

func (d *displaySsd1306) GetBounds() image.Rectangle {
	return d.dev.Bounds()
}

func (d *displaySsd1306) Test(ctx context.Context) error {
	return nil
}

func (d *displaySsd1306) Flush(crystal, page byte) {
	//return d.dev.Draw(img.Bounds(), d.img, image.Point{})
}

func (d *displaySsd1306) Close() error {
	if err := d.bus.Close(); err != nil {
		d.logger.Println("ERROR: close i2c bus:", err.Error())
	}
	return nil
}

func (d *displaySsd1306) GetImg() *image.Gray {
	return nil
}
func (d *displaySsd1306) LockImg() {

}
func (d *displaySsd1306) UnlockImg() {

}