maersai_heavy_back_vehicle/HybirdFrameworkDriver/ModbusTcpMaster/ModbusDecoder.cs

using HslCommunication.Core;
using HybirdFrameworkCore.Utils;
using log4net;

namespace HybirdFrameworkDriver.ModbusTcpMaster;

public static class ModbusDecoder
{
    private static readonly ILog Log = LogManager.GetLogger(typeof(ModbusDecoder));

    public static T Decode<T>(byte[] bytes) where T : class, new()
    {
        T t = new T();
        return Decode<T>(bytes, t);
    }

    public static T Decode<T>(byte[] bytes, T t) where T : class, new()
    {
        var fields = t.GetType().GetProperties()
            .Where(it => it.PropertyType.GetGenericTypeDefinition() == typeof(ModbusProperty<>))
            .Select(p => p.GetValue(t)).ToList();
        //startRegisterNo 获得整个对象的起始寄存器数值
        var startRegisterNo = int.MaxValue;
        foreach (var field in fields)
            if (field != null)
            {
                var p = (IModbusProperty)field;
                if (startRegisterNo > p.GetRegisterNo()) startRegisterNo = p.GetRegisterNo();
            }

        var decodeUseBytes = new byte[bytes.Length];
        switch (ModbusTcpMaster.DataFormat)
        {
            case DataFormat.ABCD:
                for (var i = 0; i < bytes.Length; i++)
                    if (i % 2 == 0)
                        decodeUseBytes[i + 1] = bytes[i];
                    else
                        decodeUseBytes[i - 1] = bytes[i];

                break;
            case DataFormat.BADC:
                decodeUseBytes = bytes;
                break;
        }

        foreach (var field in fields)
            switch (field)
            {
                case ModbusProperty<bool> boolProperty:
                {
                    SetPropertyValue(startRegisterNo, boolProperty, decodeUseBytes);
                    //SetPropertyValue(boolProperty.RegisterNo, boolProperty, decodeUseBytes);
                    break;
                }
                case ModbusProperty<byte> byteProperty:
                {
                    SetPropertyValue(startRegisterNo, byteProperty, decodeUseBytes);
                    //SetPropertyValue(byteProperty.RegisterNo, byteProperty, decodeUseBytes);
                    break;
                }
                case ModbusProperty<sbyte> sbyteProperty:
                {
                    //SetPropertyValue(sbyteProperty.RegisterNo, sbyteProperty, decodeUseBytes);
                    SetPropertyValue(startRegisterNo, sbyteProperty, decodeUseBytes);
                    break;
                }
                case ModbusProperty<short> shortProperty:
                {
                    SetPropertyValue(startRegisterNo, shortProperty, decodeUseBytes);
                    //SetPropertyValue(shortProperty.RegisterNo, shortProperty, decodeUseBytes);
                    break;
                }
                case ModbusProperty<ushort> ushortProperty:
                {
                    SetPropertyValue(startRegisterNo, ushortProperty, decodeUseBytes);
                    // SetPropertyValue(ushortProperty.RegisterNo, ushortProperty, decodeUseBytes);
                    break;
                }
                case ModbusProperty<int> intProperty:
                {
                    SetPropertyValue(startRegisterNo, intProperty, decodeUseBytes);
                    // SetPropertyValue(intProperty.RegisterNo, intProperty, decodeUseBytes);
                    break;
                }
                case ModbusProperty<uint> uintProperty:
                {
                    SetPropertyValue(startRegisterNo, uintProperty, decodeUseBytes);
                    // SetPropertyValue(uintProperty.RegisterNo, uintProperty, decodeUseBytes);
                    break;
                }
                case ModbusProperty<float> floatProperty:
                {
                    SetPropertyValue(startRegisterNo, floatProperty, decodeUseBytes);
                    // SetPropertyValue(floatProperty.RegisterNo, floatProperty, decodeUseBytes);
                    break;
                }
                case ModbusProperty<double> doubleProperty:
                {
                    SetPropertyValue(startRegisterNo, doubleProperty, decodeUseBytes);
                    // SetPropertyValue(doubleProperty.RegisterNo, doubleProperty, decodeUseBytes);
                    break;
                }
                case ModbusProperty<string> stringProperty:
                {
                    SetPropertyValue(startRegisterNo, stringProperty, decodeUseBytes);
                    // SetPropertyValue(stringProperty.RegisterNo, stringProperty, decodeUseBytes);
                    break;
                }
            }

        return t;
    }

    private static void SetPropertyValue<T>(int startRegisterNo, ModbusProperty<T> field, byte[] bytes)
    {
        var registerNo = field.RegisterNo;
        var start = field.Start;
        var length = field.Length;
        var type = field.Type;
        var scale = field.Scale;
        var round = field.Round;
        var offset = field.Offset;

        start = (registerNo - startRegisterNo) * 16 + start;

        var valueType = typeof(T);
        if (typeof(T) == typeof(byte))
            length = length * 8;
        else
            length = type switch
            {
                ModbusDataType.Register => length * 16,
                _ => length
            };

        var value = BitUtls.Bytes2Value(bytes, valueType, start, length, scale, round, offset);
        field.Value = (T)value;
    }
}