add activity test to gpio

NS.py

@@ -244,6 +244,7 @@ class NS(Game, Animation):
             gpio.initialize_gpio()
 
             # Launch a separate thread for reading the GPIO (and allowing its custom delays/sleeps)
+            self.gpio_kill = False
             self.gpio_thread = Thread(target=self.read_gpio)
             self.gpio_thread.start()
 
@@ -337,7 +338,8 @@ class NS(Game, Animation):
         """
         Test all connections of GPIO input pins.
         """
-        pass
+        while not self.gpio_kill:
+            self.gpio_data = gpio.activity() 
 
     def read_serial(self):
         while not self.serial_kill:
@@ -379,6 +381,7 @@ class NS(Game, Animation):
     def end(self, evt):
         if evt.type == QUIT or self.delegate.compare(evt, "quit"):
             self.serial_kill = True
+            self.gpio_kill = True
         Game.end(self, evt)
             
     def apply_serial(self):

gpio.py

@@ -11,7 +11,7 @@
 #
 # When run as a script, it prints connections detected between the input GPIO pins.
 
-import time, itertools
+import time, itertools, argparse
 import RPi.GPIO as GPIO
 
 # These represent the game pads and the GPIO pins they're connected to
@@ -103,12 +103,22 @@ def activity():
     return state
 
 if __name__ == "__main__":
+    # Set up and parse CLI
+    parser = argparse.ArgumentParser()
+    parser.add_argument("--connections", action="store_true")
+    parser.add_argument("--activity", action="store_true")
+    arguments = parser.parse_args()
+
     initialize_gpio()
     
     while True:
-        # Try all connections once each frame
-        for connection_ids, connection_state in connections().items():
-            # Only print connected combinations of pins
-            if connection_state:
-                pin_id_a, pin_id_b = connection_ids
-                print(f"{pin_id_a} ({pins[pin_id_a]}) <-> {pin_id_b} ({pins[pin_id_b]})")
+        if arguments.connections or not arguments.activity:
+            # Try all connections once each frame
+            for connection_ids, connection_state in connections().items():
+                # Only print connected combinations of pins
+                if connection_state:
+                    pin_id_a, pin_id_b = connection_ids
+                    print(f"{pin_id_a} ({pins[pin_id_a]}) <-> {pin_id_b} ({pins[pin_id_b]})")
+        else:
+            pin_activity = activity()
+            print(f"LNW {int(pin_activity[LNW])} LNE {int(pin_activity[LNE])} LSE {int(pin_activity[LSE])} LSW {int(pin_activity[LSW])}")