Controller cleanups

artiq/devices/lda/driver.py

@@ -26,6 +26,10 @@ class Ldasim:
     def get_att_step_size(self):
         return self._att_step_size
 
+    def close(self):
+        """Close the device."""
+        pass
+
     def get_attenuation(self):
         """Reads last attenuation value set to the simulated device.
 

artiq/devices/thorlabs_tcube/driver.py

@@ -211,6 +211,10 @@ class Tcube:
         self.port.flush()
         logger.debug("baud rate set to 115200")
 
+    def close(self):
+        """Close the device."""
+        self.port.close()
+
     def send(self, msg):
         msg.send(self.port)
 

artiq/frontend/lda_controller.py

@@ -27,8 +27,11 @@ def main():
         lda = Ldasim()
     else:
         lda = Lda(args.serial, args.product)
+    try:
         simple_server_loop({"lda": lda},
                            args.bind, args.port)
+    finally:
+        lda.close()
 
 if __name__ == "__main__":
     main()

artiq/frontend/thorlabs_tcube_controller.py

@@ -37,7 +37,10 @@ def main():
         elif args.product == "TPZ001":
             dev = Tpz(args.device)
 
+    try:
         simple_server_loop({args.product.lower(): dev}, args.bind, args.port)
+    finally:
+        dev.close()
 
 if __name__ == "__main__":
     main()