private FunctionServiceResult ProcessWriteRegisters(Sample[] samples)
{
// http://www.simplymodbus.ca/FC16.htm
//Get the raw bytes
var messageBytes = samples
.Select(s => s.Value)
.ToArray();
var dataAddress = EndianBitConverter.Big.ToUInt16(messageBytes, 2);
var numberOfRegisters = EndianBitConverter.Big.ToUInt16(messageBytes, 4);
var bytesToFollow = messageBytes[6];
if (bytesToFollow != numberOfRegisters*2)
{
return
new FunctionServiceResult(
$"The bytes to follow {bytesToFollow} does not match the number of registers {numberOfRegisters}.");
}
var registers = GetRegisters(messageBytes, numberOfRegisters, 7);
Func<Visual> visualFactory = () =>
{
var viewModel = new RegistersViewModel(registers.ToArray(), dataAddress);
return new RegistersView()
{
DataContext = viewModel
};
};
var summary = $"Write {numberOfRegisters} registers starting at register {dataAddress}";
return new FunctionServiceResult(summary, visualFactory, PacketType.Request);
}
protected FunctionServiceResult ProcessReadRegisters(Sample[] samples, PacketType? packetType)
{
//Get the raw bytes
var messageBytes = samples
.Select(s => s.Value)
.ToArray();
//We'll assume that this is a response
byte numberOfBytes = messageBytes[2];
//Get the number of registers
var numberOfRegisters = numberOfBytes / 2;
//Get the registers themselves
var registers = GetRegisters(messageBytes, numberOfRegisters, 3);
//Create the visual factory
Func<Visual> visualFactory = () =>
{
var viewModel = new RegistersViewModel(registers);
return new RegistersView()
{
DataContext = viewModel
};
};
var summary = $"{numberOfRegisters} registers.";
return new FunctionServiceResult(summary, visualFactory, packetType);
}
