From 5f4dfe5386217884e4dcd51ba8db8d0d20d1a487 Mon Sep 17 00:00:00 2001
From: Tomas Farago <tomas.farago@kit.edu>
Date: Thu, 24 Oct 2013 15:46:13 +0200
Subject: [PATCH] Don't crash on uca camera readout

---
 concert/devices/cameras/uca.py | 11 ++++++++++-
 1 file changed, 10 insertions(+), 1 deletion(-)

diff --git a/concert/devices/cameras/uca.py b/concert/devices/cameras/uca.py
index 5ec92747f..751f7a39c 100644
--- a/concert/devices/cameras/uca.py
+++ b/concert/devices/cameras/uca.py
@@ -2,6 +2,7 @@
 Cameras supported by the libuca library.
 """
 import time
+import logbook
 import numpy as np
 from concert.coroutines import null
 from concert.helpers import async, inject
@@ -11,6 +12,9 @@
 from concert.devices.cameras import base
 
 
+LOG = logbook.Logger(__name__)
+
+
 def _new_setter_wrapper(camera, name, unit=None):
     def _wrapper(value):
         if unit:
@@ -100,7 +104,12 @@ def readout(self, condition=lambda: True):
         as long as it resolves to True the camera keeps grabbing.
         """
         while condition():
-            image = self.grab()
+            image = None
+            try:
+                image = self.grab()
+            except Exception as exc:
+                LOG.debug("An error {} occured".format(exc) +
+                          " during readout, stopping")
             if image is None:
                 break
             yield image