Better handle starting values.

motorHist.py

@@ -47,8 +47,13 @@ motor_dict = {}
 
 def msta_diff(last_msta, current_msta):
   if last_msta == -1:
-    print "\t1st MSTA, No comparison possible"
-    return current_msta
+    # Display starting state
+    for index in range(15):
+      bit = 1 << index
+      if (current_msta & bit):
+        bit_state = 1
+        print "\t%s bit (0x%X) starting value is \"%s\" (0x%X)" % (msta_dict[bit][0], bit, msta_dict[bit][1][bit_state], bit_state)
+
   else:
     # XOR shows changed bits
     changed_bits = last_msta ^ current_msta
@@ -65,8 +70,13 @@ def msta_diff(last_msta, current_msta):
     
 def mip_diff(last_mip, current_mip):
   if last_mip == -1:
-    print "\t1st MIP, No comparison possible"
-    return current_mip
+    # Display starting state
+    for index in range(15):
+      bit = 1 << index
+      if (current_mip & bit):
+        bit_state = 1
+	print "\t%s bit (0x%X) starting value is \"%s\" (0x%X)" % (mip_dict[bit][0], bit, mip_dict[bit][1][bit_state], bit_state)
+
   else:
     # XOR shows changed bits
     changed_bits = last_mip ^ current_mip
@@ -127,7 +137,10 @@ def main(log_file):
         # Catch error here?
 	current_msta = int(value)
 	last_msta = motor_dict[name]["MSTA"]
-        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)
+	if last_msta == -1:
+	  print "[%s %s] %s's %s field starts at %i (0x%X)" % (date, time, name, field, current_msta, current_msta)
+	else:
+          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)
 	motor_dict[name]["MSTA"] = current_msta
 	print
@@ -137,7 +150,10 @@ def main(log_file):
         # Catch error here?
         current_mip = int(value)
 	last_mip = motor_dict[name]["MIP"]
-        print "[%s %s] %s's %s field changed from %i (0x%X) to %i (0x%X)" % (date, time, name, field, last_mip, last_mip, current_mip, current_mip)
+	if last_mip == -1:
+          print "[%s %s] %s's %s field starts at %i (0x%X)" % (date, time, name, field, current_mip, current_mip)
+	else:
+          print "[%s %s] %s's %s field changed from %i (0x%X) to %i (0x%X)" % (date, time, name, field, last_mip, last_mip, current_mip, current_mip)
 	mip_diff(last_mip, current_mip)
 	motor_dict[name]["MIP"] = current_mip
 	print