internal static void Validate(WriteHoldingRegistersRequest request, RTUResponse response)
{
if (response.Data.Length < 4)
{
throw new RTUException("The Response Data Length of '" + response.Data.Length.ToString() + "' was too short - Expecting a Length of '4'");
}
Memory <byte> bytes = response.Data.AsMemory();
Span <byte> addressBytes = bytes.Slice(0, 2).Span;
addressBytes.Reverse();
ushort address = BitConverter.ToUInt16(addressBytes);
if (address != request.Address)
{
throw new RTUException("The Response Address of '" + address.ToString() + "' did not match the Expected Address '" + request.Address.ToString() + "'");
}
Span <byte> lengthBytes = bytes.Slice(2, 2).Span;
lengthBytes.Reverse();
ushort length = BitConverter.ToUInt16(lengthBytes);
if (length != request.Values.Length)
{
throw new RTUException("The Response Values Length of '" + length.ToString() + "' did not match the Expected Values Length '" + request.Values.Length.ToString() + "'");
}
}
public async Task <WriteRegistersResult> WriteHoldingRegistersAsync(short[] values, ushort startAddress, CancellationToken cancellationToken)
{
lock (_isInitializedLock)
{
if (_isInitialized == false)
{
throw new ModbusException("This Modbus RTU Device must be Initialized first before any Requests can be Processed");
}
}
if (startAddress > MaximumAddress)
{
throw new ArgumentOutOfRangeException(nameof(startAddress), "The Start Address is greater than the Maximum Allowed Value of '" + MaximumAddress + "'");
}
if (values.Length == 0)
{
throw new ArgumentOutOfRangeException(nameof(values), "The Values Array cannot be Empty");
}
if (values.Length > MaximumRegistersWriteLength)
{
throw new ArgumentOutOfRangeException(nameof(values), "The Values Array Length was greater than the Maximum Allowed of '" + MaximumRegistersWriteLength + "'");
}
WriteHoldingRegistersRequest request = WriteHoldingRegistersRequest.CreateNew(this, startAddress, values);
ProcessRequestResult requestResult = await _channel.ProcessRequestAsync(request, _timeout, _retries, _delayBetweenMessages, cancellationToken);
WriteHoldingRegistersResponse.Validate(request, requestResult.Response);
return(new WriteRegistersResult
{
BytesSent = requestResult.BytesSent,
PacketsSent = requestResult.PacketsSent,
BytesReceived = requestResult.BytesReceived,
PacketsReceived = requestResult.PacketsReceived,
Duration = requestResult.Duration,
});
}
