public static byte[] ReadBytes(this SerialPortStream port, int bytesCount, int timeoutInSeconds)
{
var inBytes = new byte[bytesCount];
int totalReadedBytesCount = 0;
const int iterationsPerSecondCount = 20;
TimeSpan maximumMillsecondsCountToWaitAfterEachIteration =
TimeSpan.FromMilliseconds(1000.0 / iterationsPerSecondCount);
Log.Log("Iteration period = " + maximumMillsecondsCountToWaitAfterEachIteration.TotalMilliseconds.ToString("f2") +
" ms");
//int iterationsLeft = timeoutInSeconds * iterationsPerSecondCount; // check each X ms
for (int i = 0; i < timeoutInSeconds; ++i)
{
for (int j = 0; j < iterationsPerSecondCount; ++j)
{
ReadEplasedTimer.Restart();
var bytesToRead = port.BytesToRead;
if (bytesToRead != 0)
{
var currentReadedBytesCount = port.Read(inBytes, totalReadedBytesCount, bytesCount - totalReadedBytesCount);
Log.Log("Incoming bytes now are = " + inBytes.ToText());
totalReadedBytesCount += currentReadedBytesCount;
Log.Log("Total readed bytes count=" + totalReadedBytesCount);
Log.Log("Current readed bytes count=" + currentReadedBytesCount);
if (totalReadedBytesCount == inBytes.Length)
{
Log.Log("Result incoming bytes are = " + inBytes.ToText());
Log.Log("Discarding remaining bytes...");
Log.Log("Discarded bytes are: " + port.ReadAllBytes().ToText());
return(inBytes);
}
}
ReadEplasedTimer.Stop();
//Log.Log("Iteration operation time = " + ReadEplasedTimer.Elapsed.TotalMilliseconds.ToString("f2") + " ms");
var sleepTime = maximumMillsecondsCountToWaitAfterEachIteration - ReadEplasedTimer.Elapsed;
if (sleepTime.TotalMilliseconds > 0)
{
Thread.Sleep(sleepTime);
}
}
}
Log.Log("Timeout, dropping all bytes...");
Log.Log("Discarded bytes are: " + port.ReadAllBytes().ToText());
Log.Log("Rising timeout exception now");
throw new TimeoutException("ReadFromPort timeout");
}
public static void WriteBytes(this SerialPortStream port, byte[] bytes, int offset, int count)
{
port.DiscardOutBuffer();
Log.Log("Удаление всех данных исходящего буфера последовательного порта...");
var discardedInBytes = port.ReadAllBytes();
Log.Log("Удалены следующие байты: " + discardedInBytes.ToText());
port.Write(bytes, 0, bytes.Length);
}
ReadInteleconCommand(this SerialPortStream port, ushort?netAddress, int timeoutInSeconds)
{
var inBuffer = new byte[512];
int readedCount = 0;
const int iterationsPerSecondCount = 20;
TimeSpan maximumMillsecondsCountToWaitAfterEachIteration =
TimeSpan.FromMilliseconds(1000.0 / iterationsPerSecondCount);
int iterationsLeft = timeoutInSeconds * iterationsPerSecondCount; // check each X ms
for (int i = iterationsLeft; i > 0; --i)
{
ReadEplasedTimer.Restart();
// Обязательно проводить проверку, иначе метод port.Read зависнет
var bytesToRead = port.BytesToRead;
if (bytesToRead != 0)
{
var readedBytesInCurrentIteration = port.Read(inBuffer, readedCount, bytesToRead);
readedCount += readedBytesInCurrentIteration;
}
// Check buffer for commands:
if (readedCount >= 8)
{
for (int x = readedCount - 8; x >= 0; --x)
{
var possibleStart = inBuffer[x];
if (possibleStart == 0x7A)
{
// Possible cmd start!
var len = inBuffer[x + 1];
if (len <= readedCount - x - 4)
{
var possibleCmd = new byte[len + 4];
for (int y = x; y < x + len + 4; ++y)
{
possibleCmd[y - x] = inBuffer[y];
}
// Analyze CMD:
try {
possibleCmd.CheckInteleconNetBufCorrect(null, netAddress);
return(possibleCmd.ToList());
}
catch {
continue;
}
}
}
}
}
ReadEplasedTimer.Stop();
//Log.Log("Iteration operation time = " + ReadEplasedTimer.Elapsed.TotalMilliseconds.ToString("f2") + " ms");
var sleepTime = maximumMillsecondsCountToWaitAfterEachIteration - ReadEplasedTimer.Elapsed;
if (sleepTime.TotalMilliseconds > 0)
{
Thread.Sleep(sleepTime);
}
}
Log.Log(
"Истекло время ожидания ответа, будет произведено удаление всех принятых данных из буфера последовательного канала...");
Log.Log("Удалены следующие байты: " + port.ReadAllBytes().ToText() + ", выброс исключения по таймауту");
throw new TimeoutException("Истекло время ожидания ответа");
}