# HG changeset patch
# User Daniel O'Connor <darius@dons.net.au>
# Date 1242482632 -34200
# Node ID f588f5bc834acc0bf1dad9d361a2d676a4c47bdf
# Parent  154dab1e474f2173e6121ad7bf9bf109d40d7e46
Add a method to determine if the device is still connected.

This is really ham strung by libusb (or the FreeBSD implementation).

diff -r 154dab1e474f -r f588f5bc834a usb488.py
--- a/usb488.py	Sat May 16 23:33:20 2009 +0930
+++ b/usb488.py	Sat May 16 23:33:52 2009 +0930
@@ -278,3 +278,15 @@
 
         return result
     
+    def isConnected(self):
+        """Check if the device is present"""
+
+        # libusb makes it very hard (at least on FreeBSD) to determine if we're still connected.
+        # This is a reasonable proxy..
+        try:
+            self.handle.getString(self.dev.iManufacturer, 100)
+        except USBError, e:
+            return False
+
+        return True
+