private byte[] ReadSam100(byte[] requestHeader, byte[] responseHeader, ushort startAddress, ushort endAddress)
{
byte[] result = null;
var numberOfBytesRequested = (byte)(endAddress - startAddress + 1);
var commandBlock = new byte[7];
Buffer.BlockCopy(requestHeader, 0, commandBlock, 0, requestHeader.Length);
commandBlock[3] = Convert.ToByte(startAddress);
commandBlock[4] = numberOfBytesRequested;
var reqChecksum = commandBlock.Sum(y => y);
var reqMsb = (reqChecksum >> 8) & byte.MaxValue;
var reqLsb = reqChecksum & byte.MaxValue;
commandBlock[5] = Convert.ToByte(reqMsb);
commandBlock[6] = Convert.ToByte(reqLsb);
result = Controller.Execute(commandBlock, numberOfBytesRequested, responseHeader);
if (result?.Length != numberOfBytesRequested)
{
throw new InvalidDataException("Unexpected or no data was received from the SAM100 device.");
}
return(result);
}
private byte[] ReadSam205(byte[] requestHeader, byte[] responseHeader, ushort startAddress, ushort endAddress)
{
var addressMsb = startAddress >> 8;
var addressLsb = startAddress & byte.MaxValue;
var numberOfBytesRequested = (byte)(endAddress - startAddress + 1);
var commandBlock = new byte[10];
Buffer.BlockCopy(requestHeader, 0, commandBlock, 0, requestHeader.Length);
commandBlock[5] = Convert.ToByte(addressMsb);
commandBlock[6] = Convert.ToByte(addressLsb);
commandBlock[7] = Convert.ToByte(numberOfBytesRequested);
var reqChecksum = commandBlock.Sum(y => y);
var reqMsb = (reqChecksum >> 8) & byte.MaxValue;
var reqLsb = reqChecksum & byte.MaxValue;
commandBlock[8] = Convert.ToByte(reqMsb);
commandBlock[9] = Convert.ToByte(reqLsb);
var result = Controller.Execute(commandBlock, numberOfBytesRequested, responseHeader);
return(result);
}
