/// <summary>
/// Метод по считыванию слов
/// </summary>
/// <param name="slot">Слот, хранящий данные</param>
/// <returns></returns>
public static ushort[] ReadWords(Slot slot)
{
lock (typeof(DataTransfer))
{
bool res = false;
List <byte[]> querys = new List <byte[]>();
List <byte[]> answers = new List <byte[]>();
List <ushort[]> values = new List <ushort[]>();
try
{
if (_connector.Connect())
{
slot.Loaded = false;
if (slot.Size >= 120)
{
PrepareListReadWords(ref querys, ref answers, slot);
}
else
{
byte[] query = Modbus.CreateReadWordsArray(_connector.KNNumber, _connector.DeviceNumber, slot.Start, slot.Size);
querys.Add(query);
byte[] answer = _connector.ReadWrite(query);
if (answer[2] != /*5 +*/ slot.Size * 2)
{
throw new Exception("Считано неверное количество байт");
}
answers.Add(answer);
}
for (int i = 0; i < answers.Count; i++)
{
List <byte> mbVals = new List <byte>(answers[i][2]);
mbVals = answers[i].ToList().Skip(3).Take(answers[i][2]).ToList();
ushort[] value = new ushort[(mbVals.Count) / 2];
for (int j = 0; j < mbVals.Count; j += 2)
{
value[(j) / 2] = Common.TOWORD(mbVals[j], mbVals[j + 1]);
}
values.Add(value);
}
ushort[] result = new ushort[slot.Size];
int lastByteIndex = 0;
for (int i = 0; i < values.Count; i++)
{
Array.ConstrainedCopy(values[i], 0, result, lastByteIndex, values[i].Length);
lastByteIndex += values[i].Length;
}
slot.Value = result;
slot.Loaded = true;
res = true;
}
}
catch (Exception ex)
{
res = false;
if (slot != null)
{
slot.Loaded = false;
}
}
finally
{
//if (_connector.Disconnect() || !res)
//{
// res = false;
//}
}
return(res ? slot.Value : null);
}
}
private static void PrepareListReadWords(ref List <byte[]> querys, ref List <byte[]> answers, Slot slot)
{
lock (typeof(DataTransfer))
{
int temp = 0;
ushort oneSlotSize = 0x64;
int queryCount = slot.Size / oneSlotSize;
ushort lastQuerySize = (ushort)(slot.Size % oneSlotSize);
ushort addressTmp = slot.Start;
if (lastQuerySize != 0)
{
temp = 1;
}
for (int i = 0; i < queryCount + temp; i++)
{
if (temp == 0)
{
byte[] query = Modbus.CreateReadWordsArray(_connector.KNNumber, _connector.DeviceNumber,
addressTmp, oneSlotSize);
querys.Add(query);
addressTmp += oneSlotSize;
}
else
{
if (i == queryCount + temp - 2)
{
byte[] query = Modbus.CreateReadWordsArray(_connector.KNNumber, _connector.DeviceNumber,
addressTmp, oneSlotSize);
querys.Add(query);
addressTmp += oneSlotSize;
}
else if (i == queryCount + temp - 1)
{
byte[] query = Modbus.CreateReadWordsArray(_connector.KNNumber, _connector.DeviceNumber,
addressTmp, lastQuerySize);
querys.Add(query);
addressTmp += oneSlotSize;
}
else
{
byte[] query = Modbus.CreateReadWordsArray(_connector.KNNumber, _connector.DeviceNumber,
addressTmp, oneSlotSize);
querys.Add(query);
addressTmp += oneSlotSize;
}
}
}
for (int i = 0; i < querys.Count; i++)
{
if (temp == 0)
{
byte[] answer = _connector.ReadWrite(querys[i]);
if (answer[2] != 5 + oneSlotSize * 2)
{
throw new Exception("Считано неверное количество байт");
}
answers.Add(answer);
}
else
{
if (i != queryCount + temp - 1)
{
byte[] answer = _connector.ReadWrite(querys[i]);
if (answer[2] != oneSlotSize * 2)
{
throw new Exception("Считано неверное количество байт");
}
answers.Add(answer);
}
else
{
byte[] answer = _connector.ReadWrite(querys[i]);
if (answer[2] != lastQuerySize * 2)
{
throw new Exception("Считано неверное количество байт");
}
answers.Add(answer);
}
}
}
}
}