From 36cda96df07f5a358069283d2f35346ba125a5f0 Mon Sep 17 00:00:00 2001
From: Yann Sionneau <ys@m-labs.hk>
Date: Mon, 25 May 2015 21:36:14 +0200
Subject: [PATCH] pxi6733: add ping method to the driver

---
 artiq/devices/pxi6733/driver.py | 13 ++++++++++++-
 1 file changed, 12 insertions(+), 1 deletion(-)

diff --git a/artiq/devices/pxi6733/driver.py b/artiq/devices/pxi6733/driver.py
index 118169ec2..f4ffd4f52 100644
--- a/artiq/devices/pxi6733/driver.py
+++ b/artiq/devices/pxi6733/driver.py
@@ -1,6 +1,6 @@
 # Yann Sionneau <ys@m-labs.hk>, 2015
 
-from ctypes import byref
+from ctypes import byref, c_ulong
 import numpy as np
 
 
@@ -11,6 +11,9 @@ class DAQmxSim:
     def close(self):
         pass
 
+    def ping(self):
+        return True
+
 
 class DAQmx:
     """NI PXI6733 DAQ interface."""
@@ -28,6 +31,14 @@ class DAQmx:
         self.daq.DAQmxClearTask(taskhandle)
         self.tasks.remove(taskhandle)
 
+    def ping(self):
+        try:
+            data = (c_ulong*1)()
+            self.daq.DAQmxGetDevSerialNum(self.device, data)
+        except:
+            return False
+        return True
+
     def load_sample_values(self, values):
         """Load sample values into PXI 6733 device.