avr: pin change interrupt

src/examples/pininterrupt/arduino.go

@@ -0,0 +1,11 @@
+//go:build arduino
+
+package main
+
+import "machine"
+
+const (
+	button          = machine.D2
+	buttonMode      = machine.PinInputPullup
+	buttonPinChange = machine.PinRising
+)

src/examples/pininterrupt/circuitplay-express.go

@@ -5,6 +5,7 @@ package main
 import "machine"
 
 const (
+	button          = machine.BUTTON
 	buttonMode      = machine.PinInputPulldown
 	buttonPinChange = machine.PinFalling
 )

src/examples/pininterrupt/pca10040.go

@@ -5,6 +5,7 @@ package main
 import "machine"
 
 const (
+	button          = machine.BUTTON
 	buttonMode      = machine.PinInputPullup
 	buttonPinChange = machine.PinRising
 )

src/examples/pininterrupt/pininterrupt.go

@@ -12,8 +12,7 @@ import (
 )
 
 const (
-	button = machine.BUTTON
-	led    = machine.LED
+	led = machine.LED
 )
 
 func main() {

src/examples/pininterrupt/stm32.go

@@ -5,6 +5,7 @@ package main
 import "machine"
 
 const (
+	button          = machine.BUTTON
 	buttonMode      = machine.PinInputPulldown
 	buttonPinChange = machine.PinRising | machine.PinFalling
 )

src/examples/pininterrupt/wioterminal.go

@@ -5,6 +5,7 @@ package main
 import "machine"
 
 const (
+	button          = machine.BUTTON
 	buttonMode      = machine.PinInput
 	buttonPinChange = machine.PinFalling
 )