Use interfaces

Modbus.Net/src/Base.Common/BaseProtocal.cs

@@ -38,7 +38,7 @@ namespace Modbus.Net
     ///     基本协议
     /// </summary>
     public abstract class BaseProtocal<TParamIn, TParamOut, TProtocalUnit> :
-        IProtocal<TParamIn, TParamOut, TProtocalUnit> where TProtocalUnit : ProtocalUnit<TParamIn, TParamOut>
+        IProtocal<TParamIn, TParamOut, TProtocalUnit> where TProtocalUnit : class, IProtocalFormatting<TParamIn, TParamOut>
         where TParamOut : class
     {
         /// <summary>

Modbus.Net/src/Base.Common/BaseUtility.cs

@@ -44,7 +44,7 @@ namespace Modbus.Net
     ///     基础Api入口
     /// </summary>
     public abstract class BaseUtility<TParamIn, TParamOut, TProtocalUnit> : IUtilityProperty, IUtilityMethodData
-        where TProtocalUnit : ProtocalUnit<TParamIn, TParamOut> where TParamOut : class
+        where TProtocalUnit : class, IProtocalFormatting<TParamIn, TParamOut> where TParamOut : class
     {
         /// <summary>
         ///     协议收发主体

Modbus.Net/src/Base.Common/IProtocalFormatting.cs

@@ -14,6 +14,11 @@
     /// <typeparam name="TParamOut">从Connector返回的数据类型</typeparam>
     public interface IProtocalFormatting<out TParamIn, in TParamOut>
     {
+        /// <summary>
+        ///     是否为小端格式
+        /// </summary>
+        Endian Endian { get; set; }
+
         /// <summary>
         ///     从输入结构格式化
         /// </summary>