Initial commit of script. Shows MSTA changes. Assumes only one motor in the log file.

motorHist.py

+#!/usr/bin/env python
+#
+# Interpret motor changes in camonitor log
+#
+import sys
+
+#!print sys.argv
+
+msta_dict = {1 << 0 : ("Direction", ("Negative", "Positive")),
+             1 << 1 : ("Done", ("Moving", "Done")),
+	     1 << 2 : ("Plus limit", ("Off", "On")),
+	     1 << 3 : ("Home limit", ("Off", "On")),
+	     1 << 4 : ("Unused", ("0", "1")),
+	     1 << 5 : ("Closed-loop", ("Enabled", "Disabled")),
+	     1 << 6 : ("Slip/stall", ("OK", "Stalled")),
+	     1 << 7 : ("Home", ("Not Home", "Home")),
+	     1 << 8 : ("Encoder present", ("No", "Yes")),
+	     1 << 9 : ("Problem", ("No", "Yes")),
+	     1 << 10 : ("Moving", ("Done", "Moving")),
+	     1 << 11 : ("Gain support", ("No", "Yes")),
+	     1 << 12 : ("Comm error", ("OK", "Error")),
+	     1 << 13 : ("Minus limit", ("Off", "On")),
+	     1 << 14 : ("Homed", ("Not homed", "Homed")),
+	     }
+
+
+#!print msta_dict
+
+def msta_diff(last_msta, current_msta):
+  if last_msta == -1:
+    print "\t1st MSTA, No comparison possible"
+    return current_msta
+  else:
+    # XOR shows changed bits
+    changed_bits = last_msta ^ current_msta
+    
+    # Display changes
+    for index in range(15):
+      bit = 1 << index
+      if (bit & changed_bits):
+        if (current_msta & bit):
+	  bit_state = 1
+        else:
+	  bit_state = 0
+	print "\t%s (0x%X) bit changed to \"%s\"" % (msta_dict[bit][0], bit, msta_dict[bit][1][bit_state])
+    
+
+def main(log_file):
+  # Try to open the log file
+  try:
+    fh = open(log_file, 'r')
+  except IOError:
+    print "%s doesn't exist." % log_file
+    sys.exit(1)
+
+  last_msta = -1
+  last_mip = -1
+
+  for line in fh:
+    #!print line[:-1]
+    
+    # Break line into list of values: PV name, date, time, value
+    line_list = line[:-1].split()
+    if len(line_list) != 4:
+      # Line is not valid, continue to the next
+      continue
+    
+    else:
+      # split line into PV name and field
+      name, field = line_list[0].split('.')
+      date = line_list[1]
+      time = line_list[2]
+      value = line_list[3]
+ 
+      # Check for MSTA change
+      if field == "MSTA":
+        # Maybe catch error here
+	current_msta = int(value)
+        print "[%s %s] %s's %s field changed from %i (0x%X) to %i (0x%X)" % (date, time, name, field, last_msta, last_msta, current_msta, current_msta)
+	msta_diff(last_msta, current_msta)
+	last_msta = current_msta
+	print
+	
+      # Check for MIP change
+      if field == "MIP":
+        current_mip = int(value)
+
+  fh.close()
+  
+if __name__ == '__main__':
+  if len(sys.argv) != 2:
+    print "Usage: motorHist.py <log_file>"
+  else:
+    main(sys.argv[1])