public MainViewModel()
{
if (srv == null)
{
// init serial device
srv = new ModbusServer("UART0");
}
_lookup32 = createLookup32();
address = 100;
function = 3;
register = 1;
length = 1;
frequency = 100;
writingTimeout = 100;
readingTimeout = 100;
results = new ObservableCollection<string>();
}
public async Task Handle(string type)
{
string msgTemp = "TxD:{0} || RxD: \"{1}\"";
string msgTempDebug = "TxD:{0} Elapsed time:{1}ms\r\nRxD: \"{2}\" Elapsed time:{3}ms";
string txdMsg = string.Format(" data=\"{0}\", crc=\"{1}\" ", Modbus, CRC);
string rxdMsg = "";
//modbus request
string command = Modbus + CRC;
byte[] cache = convertHexToBytes(command);
var buffer = cache.AsBuffer();
byte[] result;
switch (type)
{
case "Sending":
try
{
await srv.Open(WritingTimeout, ReadingTimeout);
await srv.Send(buffer);
var received = await srv.Receive();
srv.Clear();
//modbus response
result = received.ToArray();
/*
//byte convert to string sample
Collection<string> resultStringCollection = new Collection<string>();
foreach (var b in result)
{
resultStringCollection.Add(b.ToString("X2"));
}
*/
rxdMsg = byteArrayToHexViaLookup32(result);
}
catch (Exception ex)
{
rxdMsg = ex.Message.Replace("\r\n", "\\r\\n");
}
Results.Insert(0, string.Format(msgTemp, txdMsg, rxdMsg));
break;
case "Continuous sending":
try
{
Results.Insert(0, "Start sending");
await srv.Open(WritingTimeout, ReadingTimeout);
for (int i = 0; i < Frequency; i++)
{
var begin = DateTime.Now;
await srv.Send(buffer);
var writeSpan = DateTime.Now;
var received = await srv.Receive();
var readSpan = DateTime.Now;
srv.Clear();
//modbus response
result = received.ToArray();
rxdMsg = byteArrayToHexViaLookup32(result);
Results.Insert(0, string.Format(msgTempDebug, txdMsg, (writeSpan - begin).TotalMilliseconds, rxdMsg, (readSpan - writeSpan).TotalMilliseconds));
}
}
catch (Exception ex)
{
rxdMsg = ex.Message.Replace("\r\n", "\\r\\n");
Results.Insert(0, string.Format(msgTemp, txdMsg, rxdMsg));
}
Results.Insert(0, "End sending");
break;
case "Reconnect":
if (srv.Status == ModbusServer.ModbusServerStatus.Opened)
{
srv.Cancel();
srv.Close();
srv = null;
srv = new ModbusServer("UART0");
await srv.Open();
}
break;
default:
break;
}
}