private dynamic Send(byte[] data)
{
dynamic answer = new ExpandoObject();
answer.success = false;
answer.error = string.Empty;
answer.errorcode = DeviceError.NO_ERROR;
byte[] buffer = null;
//var attempts_total = (packagesSent > 0) ? SEND_ATTEMPTS_COUNT : 1; // непонятный оператор 04.03.2019
var attempts_total = SEND_ATTEMPTS_COUNT;
for (var attempts = 0; (attempts < attempts_total) && (answer.success == false); attempts++)
{
var timeout = TIMEOUT_TIME_MIN * (attempts + 1);
buffer = SendSimple(data, timeout);
if (buffer.Length == 0)
{
answer.error = "Нет ответа";
answer.errorcode = DeviceError.NO_ANSWER;
}
else
{
if (buffer.Length < 5)
{
answer.errorcode = DeviceError.TOO_SHORT_ANSWER;
answer.error = "в кадре ответа не может содержаться менее 5 байт";
}
else if (!Crc.CheckReverse(buffer, new Crc16Modbus()))
{
answer.errorcode = DeviceError.CRC_ERROR;
answer.error = "контрольная сумма кадра не сошлась";
answer = xOAxOD(buffer);
if (answer.success)
{
buffer = answer.buffer;
}
}
else
{
answer.success = true;
answer.error = string.Empty;
answer.errorcode = DeviceError.NO_ERROR;
}
}
}
if (answer.success)
{
var offset = 0;
answer.NetworkAddress = buffer[0];
if (answer.NetworkAddress == 251)
{
offset = 12;
}
answer.Function = buffer.Skip(offset + 1).FirstOrDefault();
answer.Body = buffer.Skip(offset + 2).Take(buffer.Length - (offset + 2 + 2)).ToArray();
//modbus error
if (answer.Function > 0x80)//0xc1)
{
answer.errorcode = DeviceError.DEVICE_EXCEPTION;
answer.success = false;
answer.exceptionCode = buffer.Skip(offset + 2).FirstOrDefault();
string exceptionMessage = deviceExceptionMessage.ContainsKey(answer.exceptionCode) ? deviceExceptionMessage[answer.exceptionCode] : "";
answer.error = $"устройство вернуло ошибку: {answer.exceptionCode} {exceptionMessage}";
}
}
mid++;
return(answer);
}