private static void VerifyPec(byte[] buffer, int start, int length)
{
if (buffer.Length < start + length)
{
throw new InvalidOperationException("The PEC byte is missing in source data.");
}
if (PecCalculator.CalculatePec(buffer, start, length) != 0)
{
throw new CommunicationException("The Packet Error Code check failed.");
}
}
public Task SendByte(byte address, byte data)
{
var buffer = new byte[3];
buffer[0] = GetAddressByte(address, false);
buffer[1] = data;
buffer[2] = PecCalculator.CalculatePec(buffer, 0, 2);
var sendBuffer = new byte[2];
Array.Copy(buffer, 1, sendBuffer, 0, sendBuffer.Length);
return(Bus.Send(address, sendBuffer));
}
private Task WriteValueCommand(byte address, byte commandId, byte[] data)
{
var buffer = new byte[2 + data.Length + 1];
buffer[0] = GetAddressByte(address, false);
buffer[1] = commandId;
data.CopyTo(buffer, 2);
buffer[2 + data.Length] = PecCalculator.CalculatePec(buffer, 0, 2 + data.Length);
var sendBuffer = new byte[1 + data.Length + 1];
Array.Copy(buffer, 1, sendBuffer, 0, sendBuffer.Length);
return(Bus.Send(address, sendBuffer));
}