public static void ModBus_Create(ref MB ModBusMsg, int HostAddr, int TargetAddr, MasterSlaveMode WorkMode, int CheakMode)
{
ModBusMsg.Start = StartFlag;
ModBusMsg.End = EndFlag;
ModBusMsg.ErrorFlag = ModBus_FlagError;
ModBusMsg.SlaveAddr = (byte)TargetAddr;
ModBusMsg.MasterAddr = (byte)HostAddr;
ModBusMsg.CheakMode = CheakMode;
ModBusMsg.WorkMode = (byte)WorkMode;
}
public static void ModBusCoppyCreate(ref MB S, ref MB D)
{
D.Start = S.Start;
D.End = S.End;
D.ErrorFlag = S.ErrorFlag;
D.MasterAddr = S.MasterAddr;
D.SlaveAddr = S.SlaveAddr;
D.WorkMode = S.WorkMode;
D.CheakMode = S.CheakMode;
}
public static int ModBus_CreateMsg(ref byte[] Buf, ref MB ModBusMsg, int MsgFlag, int MsgNum, int DataFlag, byte[] Data, int DataLength)
{
int i = 0;
int Cheak;
ModBusMsg.MsgFlag = (byte)MsgFlag;
ModBusMsg.MsgNum = (byte)MsgNum;
ModBusMsg.DataFlag = (byte)DataFlag;
ModBusMsg.DataLength = DataLength;
if (DataLength > 0)
{
ModBusMsg.MsgLength = DataLength + 3;
}
else
{
ModBusMsg.MsgLength = 0;
}
Buf[i++] = (byte)ModBusMsg.Start;
if (ModBusMsg.WorkMode == (byte)MasterSlaveMode.WorkMode_Master)//当协议运行为主机模式
{
Buf[i++] = ModBusMsg.SlaveAddr;
Buf[i++] = ModBusMsg.MasterAddr;
}
else if (ModBusMsg.WorkMode == (byte)MasterSlaveMode.WorkMode_Slave)//当协议运行在从机模式
{
Buf[i++] = ModBusMsg.MasterAddr;
Buf[i++] = ModBusMsg.SlaveAddr;
}
Buf[i++] = (byte)ModBusMsg.MsgFlag;
Buf[i++] = (byte)ModBusMsg.MsgNum;
Buf[i++] = (byte)(ModBusMsg.MsgLength >> 8);
Buf[i++] = (byte)(ModBusMsg.MsgLength & 0xff);
if (DataLength > 0)//当消息包含数据
{
Buf[i++] = (byte)(ModBusMsg.DataFlag);
Buf[i++] = (byte)(ModBusMsg.DataLength >> 8);
Buf[i++] = (byte)(ModBusMsg.DataLength & 0xff);
Tools.BufferCoppy(Data, Buf, i, ModBusMsg.DataLength); i += ModBusMsg.DataLength;
}
if (ModBusMsg.CheakMode == CheakMode_Crc)
{
Cheak = Tools.GetCrc16(Buf, i);
Buf[i++] = (byte)(Cheak >> 8);
Buf[i++] = (byte)(Cheak & 0xff);
}
else if (ModBusMsg.CheakMode == CheakMode_Xor)
{
Buf[i++] = Tools.Xor(Buf, i - 1);
}
Buf[i++] = ModBusMsg.End;
return(i);
}
public static void ModBus_Clear(ref MB ModBus)
{
ModBus.Data = null;
ModBus.DataFlag = 0;
ModBus.DataLength = 0;
ModBus.End = 0;
ModBus.ErrorFlag = 0;
ModBus.MasterAddr = 0;
ModBus.MsgFlag = 0;
ModBus.MsgLength = 0;
ModBus.MsgNum = 0;
ModBus.Start = 0;
ModBus.SlaveAddr = 0;
ModBus.XorValue = 0;
ModBus.CrcValue = 0;
ModBus.CheakMode = 0;
}
public static int ModBus_Expend(byte[] Buf, int Length, ref MB ModBusMsg)
{
int i = 0;
int DataOffSet = 0;
int Cheak;
ModBusMsg.ErrorFlag = (byte)ModBus_SizeError;
if (ModBusMsg.Start != Buf[i++])
{
ModBusMsg.ErrorFlag = ModBus_FlagError; return(0);
}
if (ModBusMsg.WorkMode == (byte)MasterSlaveMode.WorkMode_Master)//当协议运行为主机模式
{
if (ModBusMsg.MasterAddr != Buf[i++])
{
ModBusMsg.ErrorFlag = ModBus_AddrError; return(0);
}
if (ModBusMsg.SlaveAddr != Buf[i++])
{
;
}
}
else if (ModBusMsg.WorkMode == (byte)MasterSlaveMode.WorkMode_Slave)//当协议运行在从机模式
{
byte TempAddr = Buf[i++];
if ((TempAddr != ModBusMsg.SlaveAddr) & (TempAddr != BroadAddr))
{
ModBusMsg.ErrorFlag = ModBus_AddrError; return(0);
}
if (Buf[i++] != ModBusMsg.MasterAddr)
{
ModBusMsg.ErrorFlag = ModBus_AddrError; return(0);
}
}
ModBusMsg.MsgFlag = Buf[i++];
ModBusMsg.MsgNum = Buf[i++];
ModBusMsg.MsgLength = Buf[i++];
ModBusMsg.MsgLength <<= 8;
ModBusMsg.MsgLength |= Buf[i++];
if (ModBusMsg.MsgLength > 0)
{
ModBusMsg.DataFlag = Buf[i++];
ModBusMsg.DataLength = Buf[i++];
ModBusMsg.DataLength <<= 8;
ModBusMsg.DataLength |= Buf[i++];
DataOffSet = i;
i += ModBusMsg.DataLength;
ModBusMsg.Data = new byte[ModBusMsg.DataLength];
for (int n = 0; n < ModBusMsg.DataLength; n++)
{
ModBusMsg.Data[n] = Buf[DataOffSet++];
}
if (ModBusMsg.MsgLength != (ModBusMsg.DataLength + 3))
{
ModBusMsg.ErrorFlag = ModBus_SizeError;
}
}
if (ModBusMsg.CheakMode == CheakMode_Xor)
{
Cheak = Tools.Xor(Buf, i);
if (Cheak != Buf[i])
{
ModBusMsg.ErrorFlag = ModBus_CheakError;
}
else
{
ModBusMsg.ErrorFlag = ModBus_Ok;
} i++; //xor校验一位
if (ModBusMsg.End != Buf[i++])
{
ModBusMsg.ErrorFlag = ModBus_FlagError; return(0);
}
//if (i != (Length - 2)) ModBusMsg.ErrorFlag = ModBus_SizeError;//有可能尾部还有其他直接忽略
}
else if (ModBusMsg.CheakMode == CheakMode_Crc)
{
Cheak = Tools.GetCrc16(Buf, i);
//MessageBox.Show(Cheak.ToString("X")); MessageBox.Show(Tools.ByteToInt16(Buf, i, 0).ToString("X"));
if (Cheak != Tools.ByteToInt16(Buf, i, 0))
{
ModBusMsg.ErrorFlag = ModBus_CheakError;
}
else
{
ModBusMsg.ErrorFlag = ModBus_Ok;
} i += 2; //crc校验2位
if (ModBusMsg.End != Buf[i++])
{
ModBusMsg.ErrorFlag = ModBus_FlagError; return(0);
}
//if (i != (Length - 3)) ModBusMsg.ErrorFlag = ModBus_SizeError;//有可能尾部还有其他直接忽略
}
return(DataOffSet);
}
