Merge pull request #97 from GS770/master

Added Bit to Types

S7.Net/PLC.cs

@@ -1221,13 +1221,13 @@ namespace S7.Net
                     else
                         return Types.Counter.ToArray(bytes);
                 case VarType.Bit:
-                    if (varCount == 1 && bitAdr <= 7)
-                    {
-                        BitArray bitArr = new BitArray(new byte[] { bytes[0] });
-                        return bitArr[bitAdr];
-                    }
+                    if (varCount == 1)
+                        if (bitAdr > 7)
+                            return null;
+                        else
+                            return Types.Bit.FromByte(bytes[0], bitAdr);
                     else
-                        return null;
+                        return Types.Bit.ToBitArray(bytes);
                 default:
                     return null;
             }

S7.Net/S7.Net.csproj

@@ -80,6 +80,7 @@
     <Compile Include="Enums.cs" />
     <Compile Include="PLC.cs" />
     <Compile Include="Properties\AssemblyInfo.cs" />
+    <Compile Include="Types\Bit.cs" />
     <Compile Include="Types\Boolean.cs" />
     <Compile Include="Types\Byte.cs" />
     <Compile Include="Types\ByteArray.cs" />

S7.Net/Types/Bit.cs

@@ -0,0 +1,29 @@
+using System;
+using System.Collections;
+
+namespace S7.Net.Types
+{
+    /// <summary>
+    /// Contains the conversion methods to convert Bit from S7 plc to C#.
+    /// </summary>
+    public static class Bit
+    {
+        /// <summary>
+        /// Converts a Bit to bool
+        /// </summary>
+        public static bool FromByte(byte v, byte bitAdr)
+        {
+            BitArray bitArr = new BitArray(new byte[] { v });
+            return bitArr[bitAdr];
+        }
+
+        /// <summary>
+        /// Converts an array of bytes to a BitArray
+        /// </summary>
+        public static BitArray ToBitArray(byte[] bytes)
+        {
+            BitArray bitArr = new BitArray(bytes);
+            return bitArr;
+        }
+    }
+}