param_help.py: pretty-print Bitmask in eg. 'param help GUID_OPTIONS' …

…output

MAVProxy/modules/lib/param_help.py

@@ -165,6 +165,9 @@ def param_help(self, args):
                 try:
                     print("\n")
                     for f in help.field:
+                        if f.get('name') == 'Bitmask':
+                            # handled specially below
+                            continue
                         print("%s : %s" % (f.get('name'), str(f)))
                 except Exception as e:
                     pass
@@ -177,6 +180,16 @@ def param_help(self, args):
                 except Exception as e:
                     print("Caught exception %s" % repr(e))
                     pass
+                try:
+                    # note this is a dictionary:
+                    values = self.get_bitmask_from_help(help)
+                    if values is not None and len(values):
+                        print("\nBitmask: ")
+                        for (n, v) in values.items():
+                            print(f"\t{int(n):3d} : {v}")
+                except Exception as e:
+                    print("Caught exception %s" % repr(e))
+                    pass
             else:
                 print("Parameter '%s' not found in documentation" % h)