initial commit

internal/PinControlService/Pin.go

@@ -0,0 +1,101 @@
+package PinControlService
+
+import (
+	"errors"
+	log "github.com/sirupsen/logrus"
+	"github.com/stianeikeland/go-rpio"
+)
+
+type Pin struct {
+	Id         int
+	Name 	   string
+	Direction  PinDirection
+	PullConfig PinPull
+	InitialState     PinCommand
+	PinHandle  rpio.Pin
+	SendPollingEvents bool
+	SendChangeEvents bool
+
+}
+
+func NewPin(config PinConfig) Pin {
+	p := Pin{
+		Direction: config.Direction,
+		PullConfig: config.PullConfig,
+		Name: config.Name,
+		Id: config.PinNumber,
+		PinHandle: rpio.Pin(config.PinNumber),
+	}
+
+	if config.SendPollingEvents != nil {
+		p.SendPollingEvents = *config.SendPollingEvents
+	} else {
+		p.SendPollingEvents = true
+	}
+
+	if config.SendChangeEvents != nil {
+		p.SendChangeEvents = *config.SendChangeEvents
+	} else {
+		p.SendChangeEvents = true
+	}
+
+	if config.InitialState != "" {
+		p.InitialState = PinCommand(config.InitialState)
+	} else {
+		p.InitialState = Off
+	}
+
+	return p
+}
+
+func (p *Pin) State() PinState {
+	if state := p.PinHandle.Read(); state == rpio.High {
+		return StateOn
+	} else {
+		return StateOff
+	}
+}
+
+func (p *Pin) Command(cmd PinCommand) error{
+	log.Debugf("try to send command %s for pin %s (pin no: %d)", cmd, p.Name, p.Id)
+	if p.Direction != Output {
+		return errors.New("pin is not an output")
+	}
+
+	if cmd == On {
+		p.PinHandle.High()
+	} else if cmd == Off {
+		p.PinHandle.Low()
+	} else if cmd == Toggle {
+		p.PinHandle.Toggle()
+	} else {
+		return errors.New("unknown command")
+	}
+
+	return nil
+}
+
+func (p *Pin) Configure() {
+	if p.Direction == Input {
+		p.PinHandle.Input()
+	} else if p.Direction == Output {
+		p.PinHandle.Output()
+		_ = p.Command(p.InitialState)
+	}
+
+	p.PinHandle.Detect(rpio.AnyEdge)
+
+	if p.PullConfig == PullUp {
+		p.PinHandle.PullUp()
+	} else if p.PullConfig == PullDown {
+		p.PinHandle.PullDown()
+	} else if p.PullConfig == PullOff {
+		p.PinHandle.PullOff()
+	}
+
+}
+
+func (p *Pin) Changed() bool {
+	return p.PinHandle.EdgeDetected()
+}
+