PKGBUILD/pkg/rgbled/led.go

package rgbled

import (
	"fmt"

	"github.com/go-flucky/flucky/pkg/types"
	"github.com/stianeikeland/go-rpio"
)

type LED struct {
	*types.RGBLED
}

func (l *LED) Blue(on bool) error {
	gpios := []*types.GPIO{
		l.BaseColorsToGPIO[types.BaseColorBlue],
	}

	if err := l.Off(); err != nil {
		return err
	}

	if err := l.operate(gpios, on); err != nil {
		return fmt.Errorf("Can not operate with GPIOs: %v", err)
	}

	return nil
}

func (l *LED) Green(on bool) error {

	gpios := []*types.GPIO{
		l.BaseColorsToGPIO[types.BaseColorGreen],
	}

	if err := l.Off(); err != nil {
		return err
	}

	if err := l.operate(gpios, on); err != nil {
		return fmt.Errorf("Can not operate with GPIOs: %v", err)
	}

	return nil

}

func (l *LED) Off() error {

	gpios := []*types.GPIO{
		l.BaseColorsToGPIO[types.BaseColorBlue],
		l.BaseColorsToGPIO[types.BaseColorGreen],
		l.BaseColorsToGPIO[types.BaseColorRed],
	}

	if err := l.operate(gpios, false); err != nil {
		return fmt.Errorf("Can not turn GPIOs off: %v", err)
	}

	return nil
}

func (l *LED) Purple(on bool) error {
	gpios := []*types.GPIO{
		l.BaseColorsToGPIO[types.BaseColorBlue],
		l.BaseColorsToGPIO[types.BaseColorRed],
	}

	if err := l.Off(); err != nil {
		return err
	}

	if err := l.operate(gpios, on); err != nil {
		return fmt.Errorf("Can not operate with GPIOs: %v", err)
	}

	return nil
}

func (l *LED) Red(on bool) error {
	gpios := []*types.GPIO{
		l.BaseColorsToGPIO[types.BaseColorRed],
	}

	if err := l.Off(); err != nil {
		return err
	}

	if err := l.operate(gpios, on); err != nil {
		return fmt.Errorf("Can not operate with GPIOs: %v", err)
	}

	return nil
}

func (l *LED) Turquoise(on bool) error {
	gpios := []*types.GPIO{
		l.BaseColorsToGPIO[types.BaseColorBlue],
		l.BaseColorsToGPIO[types.BaseColorGreen],
	}

	if err := l.Off(); err != nil {
		return err
	}

	if err := l.operate(gpios, on); err != nil {
		return fmt.Errorf("Can not operate with GPIOs: %v", err)
	}

	return nil
}

func (l *LED) White(on bool) error {
	gpios := []*types.GPIO{
		l.BaseColorsToGPIO[types.BaseColorBlue],
		l.BaseColorsToGPIO[types.BaseColorGreen],
		l.BaseColorsToGPIO[types.BaseColorRed],
	}

	if err := l.Off(); err != nil {
		return err
	}

	if err := l.operate(gpios, on); err != nil {
		return fmt.Errorf("Can not operate with GPIOs: %v", err)
	}

	return nil
}

func (l *LED) Yellow(on bool) error {
	gpios := []*types.GPIO{
		l.BaseColorsToGPIO[types.BaseColorGreen],
		l.BaseColorsToGPIO[types.BaseColorRed],
	}

	if err := l.Off(); err != nil {
		return err
	}

	if err := l.operate(gpios, on); err != nil {
		return fmt.Errorf("Can not operate with GPIOs: %v", err)
	}

	return nil
}

func (l *LED) operate(gpios []*types.GPIO, on bool) error {
	if err := rpio.Open(); err != nil {
		return fmt.Errorf("Cam not open rpio connection: %v", err)
	}
	defer rpio.Close()

	for _, gpio := range gpios {
		gpioInt, err := types.GPIOToInt(*gpio)
		if err != nil {
			return fmt.Errorf("Can not determine %v into integer: %v", gpio, err)
		}

		pin := rpio.Pin(gpioInt)

		if on {
			pin.High()
		} else {
			pin.Low()
		}
	}
	return nil
}