Basic VFD and E300 devices. Can RW, but not control.

common.py

@@ -0,0 +1,38 @@
+"""Hold common functions for CIP messaging."""
+from datetime import datetime
+
+
+def reverse_parameter_name(lower_underscore):
+    """Reverse the parameter lookup process."""
+    lower_split = lower_underscore.split("_")
+    upper_split = [x[0].upper() + x[1:] for x in lower_split]
+    return " ".join(upper_split)
+
+
+def bitfield(n):
+    """Distribute integer into bits."""
+    binary_with_padding = "0"*32 + bin(int(n))[2:]
+    binary = binary_with_padding[-32:]
+    bin_array = [1 if digit == '1' else 0 for digit in binary]
+    bin_array.reverse()
+    return bin_array
+
+
+class CIP_value(object):
+    """Value of vfd parameter."""
+
+    def __init__(self, name, units):
+        """Initialize VFD Parameter."""
+        self.name = name
+        self.value = None
+        self.timestamp = 0
+        self.units = units
+
+    def update(self, value):
+        """Update the current value."""
+        self.value = value
+        self.timestamp = datetime.now()
+
+    def __str__(self):
+        """Represent as a string."""
+        return "name: {}, value: {} {}, timestamp: {}".format(self.name, self.value, self.units, self.timestamp)