[TestMethod] // Handling Request on Server
public void WriteSingleCoilPDU_LifeCycle()
{
var RandomGen = new Random();
int Address = RandomGen.Next(MinAddress, MaxAddress);
var Value = (RandomGen.Next(2) != 0);
var Server = new BaseModbusServer();
Server.AddCoil(Address);
var ClientPDU = new WriteSingleCoilPDU(Address, Value);
var Request = ClientPDU.BuildRequest();
var ServerPDU = new WriteSingleCoilPDU();
var ReqStatus = ServerPDU.CheckRequest(Request);
Assert.AreEqual(Status.OK, ReqStatus, "Recognition Error");
Assert.AreEqual(Address, ServerPDU.StartingAddress, "Whong Address recognition in CheckRequest");
ServerPDU.Handle(Server);
Assert.AreEqual(Value, ServerPDU.Value, "Whong Address recognition in CheckRequest");
ClientPDU.CheckResponse(ServerPDU.BuildResponse());
Assert.AreEqual(Value, ClientPDU.Value, "Whong Address recognition in CheckRequest");
}
[TestMethod] // Oficial Example
public void WriteSingleCoilPDU_DocSampleReq()
{
var PDU = new WriteSingleCoilPDU(172, true);
var ExpectedReq = new byte[]
{
0x05, // Function Code
0x00, // Starting Address Hi
0xAC, // Starting Address Lo
0xFF, // Quantity of Inputs Hi
0x00, // Quantity of Inputs Lo
};
var ActualReq = PDU.BuildRequest();
CollectionAssert.AreEqual(ExpectedReq, ActualReq, "Wrong Request");
}
public void WriteSingleCoilPDU_ArgumentRange()
{
IProtocolDataUnit TestingPDU;
try
{
TestingPDU = new WriteSingleCoilPDU(MinAddress - 1, true);
Assert.Fail("Min Address Error");
}
catch (ArgumentOutOfRangeException) { }
try
{
TestingPDU = new WriteSingleCoilPDU(MaxAddress + 1, true);
Assert.Fail("Min Address Error");
}
catch (ArgumentOutOfRangeException) { }
}
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 void WriteSingleCoil(IModbusDevice Device, int StartAddr, bool Value)
{
if (!(Device is RTU_Device))
throw new ArgumentException("Wrong Type", "Device");
var PDU = new WriteSingleCoilPDU(StartAddr, Value);
var ADU = new RTU_ADU((Device as RTU_Device), PDU);
Query(ADU);
}
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);
}