refactor lighthardware struct

- add led struct for individual colour LEDs

main.go

@@ -11,32 +11,32 @@ type pwm interface {
 	Channel(machine.Pin) (uint8, error)
 }
 
+type led struct {
+	pin     machine.Pin
+	pwm     pwm
+	channel uint8
+}
+
 type lighthardware struct {
-	rPin machine.Pin
-	gPin machine.Pin
-	bPin machine.Pin
-	rPwm pwm
-	gPwm pwm
-	bPwm pwm
-	rCh  uint8
-	gCh  uint8
-	bCh  uint8
+	red   led
+	green led
+	blue  led
 }
 
 func (lhw *lighthardware) InitPWM() error {
 	var err error
 
-	lhw.rCh, err = lhw.rPwm.Channel(lhw.rPin)
+	lhw.red.channel, err = lhw.red.pwm.Channel(lhw.red.pin)
 	if err != nil {
 		return err
 	}
 
-	lhw.gCh, err = lhw.gPwm.Channel(lhw.gPin)
+	lhw.green.channel, err = lhw.green.pwm.Channel(lhw.green.pin)
 	if err != nil {
 		return err
 	}
 
-	lhw.bCh, err = lhw.bPwm.Channel(lhw.bPin)
+	lhw.blue.channel, err = lhw.blue.pwm.Channel(lhw.blue.pin)
 	if err != nil {
 		return err
 	}
@@ -120,12 +120,18 @@ func main() {
 	})
 
 	insideLight := lighthardware{
-		rPin: machine.GP11,
-		gPin: machine.GP13,
-		bPin: machine.GP12,
-		rPwm: pwm5,
-		gPwm: pwm6,
-		bPwm: pwm6,
+		red: led{
+			pin: machine.GP11,
+			pwm: pwm5,
+		},
+		green: led{
+			pin: machine.GP13,
+			pwm: pwm6,
+		},
+		blue: led{
+			pin: machine.GP12,
+			pwm: pwm6,
+		},
 	}
 	err := insideLight.InitPWM()
 
@@ -133,12 +139,18 @@ func main() {
 		errs <- err
 	} else {
 		insideLight2 := lighthardware{
-			rPin: machine.GP8,
-			gPin: machine.GP10,
-			bPin: machine.GP9,
-			rPwm: pwm4,
-			gPwm: pwm5,
-			bPwm: pwm4,
+			red: led{
+				pin: machine.GP8,
+				pwm: pwm4,
+			},
+			green: led{
+				pin: machine.GP10,
+				pwm: pwm5,
+			},
+			blue: led{
+				pin: machine.GP9,
+				pwm: pwm4,
+			},
 		}
 		err = insideLight2.InitPWM()
 
@@ -146,12 +158,18 @@ func main() {
 			errs <- err
 		} else {
 			outsideLight := lighthardware{
-				rPin: machine.GP5,
-				gPin: machine.GP7,
-				bPin: machine.GP6,
-				rPwm: pwm2,
-				gPwm: pwm3,
-				bPwm: pwm3,
+				red: led{
+					pin: machine.GP5,
+					pwm: pwm2,
+				},
+				green: led{
+					pin: machine.GP7,
+					pwm: pwm3,
+				},
+				blue: led{
+					pin: machine.GP6,
+					pwm: pwm3,
+				},
 			}
 			err = outsideLight.InitPWM()
 
@@ -258,7 +276,7 @@ func normal(lights lightSet, inBrightChange <-chan uint32, outBrightChange <-cha
 }
 
 func setNormal(light *lighthardware, brightness uint32) {
-	ledset(light.rPwm, light.rCh, brightness)
-	ledset(light.gPwm, light.gCh, brightness)
-	ledset(light.bPwm, light.bCh, brightness)
+	ledset(light.red.pwm, light.red.channel, brightness)
+	ledset(light.green.pwm, light.green.channel, brightness)
+	ledset(light.blue.pwm, light.blue.channel, brightness)
 }