Add bootloader.py

internal_filesystem/lib/mpos/bootloader.py

@@ -0,0 +1,25 @@
+from mpos.apps import Activity
+import lvgl as lv
+
+class ResetIntoBootloader(Activity):
+    message = "Bootloader mode activated.\nYou can now install firmware over USB.\n\nReset the device to cancel."
+
+    def onCreate(self):
+        print(self.message)
+        screen = lv.obj()
+        label = lv.label(screen)
+        label.set_text(self.message)
+        label.center()
+        self.setContentView(screen)
+
+    def onResume(self, screen):
+        # Use a timer, otherwise the UI won't have time to update:
+        timer = lv.timer_create(self.start_bootloader, 1000, None) # give it some time (at least 500ms) for the new screen animation
+        timer.set_repeat_count(1)
+
+    def start_bootloader(self, timer):
+        try:
+            import machine
+            machine.bootloader()
+        except Exception as e:
+            print(f"Could not reset into bootloader because: {e}")