private byte[] createRespondMessage()
{
int numberOfPoints = 0;
int bytesToSend = 0;
int startAddress = 0;
numberOfPoints = (_messageReceived[4] << 8) | _messageReceived[5];
bytesToSend = 5 + numberOfPoints * 2;
byte[] respondMessage = new byte[bytesToSend];
respondMessage[0] = _slaveAddress;
respondMessage[1] = 3;
respondMessage[2] = Convert.ToByte(2 * numberOfPoints);
startAddress = (_messageReceived[2] << 8) | _messageReceived[3];
lock (loc_aenvoyer)
{
int j = 0;
for (int i = 0; i < numberOfPoints; i++)
{
respondMessage[i + j + 3] = Convert.ToByte((Form1.aenvoyer[startAddress + i] >> 8) & 0xff);
respondMessage[i + j + 4] = Convert.ToByte(Form1.aenvoyer[startAddress + i] & 0xff);
j++;
}
}
byte[] crcCalculation = CRCStuff.calculateCRC(ref respondMessage, bytesToSend - 2);
respondMessage[bytesToSend - 2] = crcCalculation[0];
respondMessage[bytesToSend - 1] = crcCalculation[1];
return(respondMessage);
}
void serial1_DataReceived(object sender, SerialDataReceivedEventArgs e)
{
while (serial1.BytesToRead >= 8)
{
serial1.Read(_messageReceived, 0, 8);
//addLog(createLogStr(ref _messageReceived), LogType.RX);
if (_messageReceived[0] == _slaveAddress && _messageReceived[1] == 3)
{
if (CRCStuff.checkCRC(ref _messageReceived, 8))
{
DateTime test = Form1.date_tcpip.AddMinutes(15);
if (test > DateTime.Now)
{
byte[] messageToSend = createRespondMessage();
System.Threading.Thread.Sleep(_slaveDelay);
serial1.Write(messageToSend, 0, messageToSend.Length);
if (reponse_modbus1 != null)
{
reponse_modbus1(DateTime.Now);
}
}
}
else
{
if (logging_info_evt != null)
{
logging_info_evt("Modbus, CRC erreur.");
}
// on vide le buffer
if (serial1.BytesToRead > 0)
{
byte[] buf_1 = new byte[serial1.BytesToRead];
serial1.Read(buf_1, 0, serial1.BytesToRead);
}
}
}
else
{
if (logging_info_evt != null)
{
logging_info_evt("Modbus, adresse erreur.");
}
// on vide le buffer
if (serial1.BytesToRead > 0)
{
byte[] buf_1 = new byte[serial1.BytesToRead];
serial1.Read(buf_1, 0, serial1.BytesToRead);
}
}
}
}