nhet_cn_back_vehicle/HybirdFrameworkDriver/ModbusTcpMaster/ModbusDecoder.cs

using HslCommunication.Core;
using HslCommunication.Secs.Types;
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, T t) where T : class, new()
    {
        List<object?> 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
        int startRegisterNo = Int32.MaxValue;
        foreach (object? field in fields)
        {
            if (field != null)
            {
                IModbusProperty p = (IModbusProperty)field;
                if (startRegisterNo > p.GetRegisterNo())
                {
                    startRegisterNo = p.GetRegisterNo();
                }
            }
        }
        byte[] decodeUseBytes = new byte[bytes.Length];
        switch (ModbusTcpMaster.DataFormat)
        {
            case DataFormat.ABCD:
                for (int 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 (object? 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)
    {

        int registerNo = field.RegisterNo;
        int start = field.Start;
        int length = field.Length;
        ModbusDataType type = field.Type;
        double scale = field.Scale;
        int round = field.Round;
        double offset = field.Offset;

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

        Type valueType = typeof(T);
        if (typeof(T) == typeof(byte))
            length = length * 8;
        else
        {
            length = type switch
            {
                ModbusDataType.Register => length * 16,
                _ => length
            };
        }
        object value = BitUtls.Bytes2Value(bytes, valueType, start, length, scale, round, offset);
        field.Value = (T)value;
    }
}