Quit app on A+C pressed using an interrupt handler.

Note if apps set up their own interrupt handlers then they take precedence, but in that case the app should be responsible for quitting.

micropython/examples/badger2040/badge.py

@@ -214,10 +214,6 @@ def draw_badge():
 draw_badge()
 
 while True:
-    # Pressing A and C together quits the app
-    if display.pressed(badger2040.BUTTON_A) and display.pressed(badger2040.BUTTON_C):
-        break
-
     if display.pressed(badger2040.BUTTON_A) or display.pressed(badger2040.BUTTON_B) or display.pressed(badger2040.BUTTON_C) or display.pressed(badger2040.BUTTON_UP) or display.pressed(badger2040.BUTTON_DOWN):
         draw_overlay("To change the text, connect Badger2040 to a PC, load up Thonny, and modify badge.txt",
                      WIDTH - OVERLAY_BORDER, HEIGHT - OVERLAY_BORDER, OVERLAY_SPACING, OVERLAY_TEXT_SIZE)
@@ -230,4 +226,3 @@ def draw_badge():
 
     # If on battery, halt the Badger to save power, it will wake up if any of the front buttons are pressed
     display.halt()
-    time.sleep(0.1)

micropython/examples/badger2040/badger_os.py

@@ -97,6 +97,22 @@ def launch(file):
         if k not in ("gc", "file", "machine"):
             del locals()[k]
     gc.collect()
+
+    button_a = machine.Pin(badger2040.BUTTON_A, machine.Pin.IN, machine.Pin.PULL_DOWN)
+    button_c = machine.Pin(badger2040.BUTTON_C, machine.Pin.IN, machine.Pin.PULL_DOWN)
+
+    def quit_to_launcher(pin):
+        if button_a.value() and button_c.value():
+            import os
+            try:
+                os.remove(STATE_FILE)
+            except OSError:
+                pass
+            machine.reset()
+
+    button_a.irq(trigger=machine.Pin.IRQ_RISING, handler=quit_to_launcher)
+    button_c.irq(trigger=machine.Pin.IRQ_RISING, handler=quit_to_launcher)
+
     try:
         __import__(file[1:])  # Try to import _[file] (drop underscore prefix)
     except ImportError:

micropython/examples/badger2040/image.py

@@ -127,10 +127,6 @@ def show_image(n):
 
 
 while True:
-    # Pressing A and C together quits the app
-    if display.pressed(badger2040.BUTTON_A) and display.pressed(badger2040.BUTTON_C):
-        break
-
     if display.pressed(badger2040.BUTTON_UP):
         if current_image > 0:
             current_image -= 1
@@ -158,4 +154,3 @@ def show_image(n):
 
     # Halt the Badger to save power, it will wake up if any of the front buttons are pressed
     display.halt()
-    time.sleep(0.1)

micropython/examples/badger2040/launcher.py

@@ -209,7 +209,9 @@ def button(pin):
     render()
 
 display.update_speed(badger2040.UPDATE_FAST)
-
+if not changed and not display.woken():
+    render()
+
 while True:
     if display.pressed(badger2040.BUTTON_A):
         button(badger2040.BUTTON_A)