/// <summary>
/// Converts an array of ushort (UInt16) to an array of bytes
/// </summary>
public static byte[] ToByteArray(UInt16[] value)
{
ByteArray arr = new ByteArray();
foreach (UInt16 val in value)
arr.Add(ToByteArray(val));
var result= arr.Array;
arr.Clear();
arr = null;
return result;
}
/// <summary>
/// Converts an array of uint (UInt32) to an array of S7 DWord (4 bytes)
/// </summary>
public static byte[] ToByteArray(UInt32[] value)
{
ByteArray arr = new ByteArray();
foreach (UInt32 val in value)
{
arr.Add(ToByteArray(val));
}
var result = arr.Array;
arr.Clear();
arr = null;
return(result);
}
private async Task WriteBitWithASingleRequestAsync(DataType dataType, int db, int startByteAdr, int bitAdr, bool bitValue)
{
byte[] bReceive = new byte[513];
int varCount = 0;
try
{
var value = new[] { bitValue ? (byte)1 : (byte)0 };
varCount = value.Length;
// first create the header
int packageSize = 35 + value.Length;
ByteArray package = new Types.ByteArray(packageSize);
package.Add(new byte[] { 3, 0, 0 });
package.Add((byte)packageSize);
package.Add(new byte[] { 2, 0xf0, 0x80, 0x32, 1, 0, 0 });
package.Add(Word.ToByteArray((ushort)(varCount - 1)));
package.Add(new byte[] { 0, 0x0e });
package.Add(Word.ToByteArray((ushort)(varCount + 4)));
package.Add(new byte[] { 0x05, 0x01, 0x12, 0x0a, 0x10, 0x01 }); //ending 0x01 is used for writing a sinlge bit
package.Add(Word.ToByteArray((ushort)varCount));
package.Add(Word.ToByteArray((ushort)(db)));
package.Add((byte)dataType);
int overflow = (int)(startByteAdr * 8 / 0xffffU); // handles words with address bigger than 8191
package.Add((byte)overflow);
package.Add(Word.ToByteArray((ushort)(startByteAdr * 8 + bitAdr)));
package.Add(new byte[] { 0, 0x03 }); //ending 0x03 is used for writing a sinlge bit
package.Add(Word.ToByteArray((ushort)(varCount)));
// now join the header and the data
package.Add(value);
await stream.WriteAsync(package.Array, 0, package.Array.Length);
package.Clear();
package = null;
var s7data = await COTP.TSDU.ReadAsync(stream);
if (s7data == null || s7data[14] != 0xff)
{
throw new PlcException(ErrorCode.WrongNumberReceivedBytes);
}
}
catch (Exception exc)
{
throw new PlcException(ErrorCode.WriteData, exc);
}
}