public void ReadHoldingRegistersPDU_ArgumentRange()
{
IProtocolDataUnit TestingPDU;
try
{
TestingPDU = new ReadHoldingRegistersPDU(MinAddress - 1, NormQuantity);
Assert.Fail("Min Address Error");
}
catch (ArgumentOutOfRangeException) { }
try
{
TestingPDU = new ReadHoldingRegistersPDU(MaxAddress + 1, NormQuantity);
Assert.Fail("Max Address Error");
}
catch (ArgumentOutOfRangeException) { }
try
{
TestingPDU = new ReadHoldingRegistersPDU(NormAddress, MinQuantity - 1);
Assert.Fail("Min Quantity Error");
}
catch (ArgumentOutOfRangeException) { }
try
{
TestingPDU = new ReadHoldingRegistersPDU(NormAddress, MaxQuantity + 1);
Assert.Fail("Max Quantity Error");
}
catch (ArgumentOutOfRangeException) { }
}
public void RTU_ADU_LifeCycle()
{
var ClientPDU = new ReadHoldingRegistersPDU(5, 10);
var Device = new RTU_Device(1);
var ClientADU = new RTU_ADU(Device, ClientPDU);
var ServerADU = new RTU_ADU(Device);
ServerADU.CheckRequest(ClientADU.BuildRequest());
}
[TestMethod] // Oficial Example
public void ReadHoldingRegistersPDU_DocSampleReq()
{
var PDU = new ReadHoldingRegistersPDU(107, 3);
var ExpectedReq = new byte[]
{
0x03, // Function Code
0x00, // Starting Address Hi
0x6B, // Starting Address Lo
0x00, // Quantity of Inputs Hi
0x03, // Quantity of Inputs Lo
};
var ActualReq = PDU.BuildRequest();
CollectionAssert.AreEqual(ExpectedReq, ActualReq, "Wrong Request");
}
[TestMethod] // Handling Request on Server
public void ReadHoldingRegistersPDU_LifeCycle()
{
var RandomGen = new Random();
int Address = RandomGen.Next(MinAddress, MaxAddress);
int Quantity = RandomGen.Next(MinQuantity, MaxQuantity);
#region Build Server and Values
var Server = new BaseModbusServer();
var Values = new int[Quantity];
for (int i = 0; i < Quantity; i++)
{
Values[i] = RandomGen.Next(0xFFFF);
Server.AddHoldingRegister(Address + i, Values[i]);
}
#endregion
var ClientPDU = new ReadHoldingRegistersPDU(Address, Quantity);
var Request = ClientPDU.BuildRequest();
var ServerPDU = new ReadHoldingRegistersPDU();
var ReqStatus = ServerPDU.CheckRequest(Request);
Assert.AreEqual(Status.OK, ReqStatus, "Recognition Error");
Assert.AreEqual(Address, ServerPDU.StartingAddress, "Whong Address recognition in CheckRequest");
Assert.AreEqual(Quantity, ServerPDU.Quantity, "Whong Quantity recognition in CheckRequest");
ServerPDU.Handle(Server);
CollectionAssert.AreEqual(Values, ServerPDU.Value, "Whong Address recognition in CheckRequest");
ClientPDU.CheckResponse(ServerPDU.BuildResponse());
CollectionAssert.AreEqual(Values, ClientPDU.Value, "Whong Address recognition in CheckRequest");
}
public Status CheckRequest(byte[] Request)
{
if (Request.Length < 13)
return Status.Error;
Header = new MBAP(Request);
if (Header.ProtocolID != 0)
return Status.Error;
switch (Request[1])
{
case 0x01: PDU = new ReadCoilsPDU(); break;
case 0x02: PDU = new ReadDiscreteInputsPDU(); break;
case 0x03: PDU = new ReadHoldingRegistersPDU(); break;
case 0x04: PDU = new ReadInputRegistersPDU(); break;
case 0x05: PDU = new WriteSingleCoilPDU(); break;
case 0x06: PDU = new WriteSingleRegisterPDU(); break;
case 0x0F: PDU = new WriteMultipleCoilsPDU(); break;
case 0x10: PDU = new WriteMultipleRegistersPDU(); break;
default: return Status.Error;
}
var PDURequest = new byte[Request.Length - 3];
for (int i=0; i<PDURequest.Length; i++)
PDURequest[i] = Request[i + 1];
return PDU.CheckRequest(PDURequest);
}
public int[] ReadHoldingRegisters(IModbusDevice Device, int StartAddr, int Quantity)
{
if (!(Device is RTU_Device))
throw new ArgumentException("Wrong Type", "Device");
var PDU = new ReadHoldingRegistersPDU(StartAddr, Quantity);
var ADU = new RTU_ADU((Device as RTU_Device), PDU);
Query(ADU);
return PDU.Value;
}
public Status CheckRequest(byte[] Request)
{
if ( (Request.Length < 4) || (Request[0] != Device.Address) ) // 3 = Address + FuncCode + CRC_Lo + CRC_Hi
return Status.Error;
if (CRC.Get(Request) != 0)
return Status.Error;
switch (Request[1])
{
case 0x01: PDU = new ReadCoilsPDU(); break;
case 0x02: PDU = new ReadDiscreteInputsPDU(); break;
case 0x03: PDU = new ReadHoldingRegistersPDU(); break;
case 0x04: PDU = new ReadInputRegistersPDU(); break;
case 0x05: PDU = new WriteSingleCoilPDU(); break;
case 0x06: PDU = new WriteSingleRegisterPDU(); break;
case 0x0F: PDU = new WriteMultipleCoilsPDU(); break;
case 0x10: PDU = new WriteMultipleRegistersPDU(); break;
default: return Status.Error;
}
var PDURequest = new byte[Request.Length - 3];
for (int i=0; i<PDURequest.Length; i++)
PDURequest[i] = Request[i + 1];
return PDU.CheckRequest(PDURequest);
}
