Implement safe, non-conflicting loopback boot method with BOOT button exit and automatic 120s timeout reset

demo_audio_loopback.py

@@ -93,7 +93,27 @@ def main():
             display.show()
             
         print("Ready: Press and hold key/screen to record...")
+        start_wait = time.ticks_ms()
         while not is_talk_trigger_active():
+            if buttons.boot.is_pressed() or time.ticks_diff(time.ticks_ms(), start_wait) > 120000:
+                print("Exit condition met. Deleting flag and resetting...")
+                if display:
+                    display.clear(0)
+                    if board_config.BOARD_TYPE == 'WAVESHARE_RLCD':
+                        display.text("Exiting test...", 15, 60, 1)
+                        display.text("Rebooting to normal...", 15, 80, 1)
+                    else:
+                        display.text("Exiting test...", 10, 50, 1)
+                        display.text("Rebooting to normal...", 10, 70, 1)
+                    display.show()
+                time.sleep(1)
+                try:
+                    import os
+                    os.remove("run_loopback.txt")
+                except:
+                    pass
+                import machine
+                machine.reset()
             time.sleep_ms(30)
             
         print("Recording started! Speak into the microphone...")