public Form1()
{
InitializeComponent();
plcStatusLabel = this.PLCStatusLabel;
messageReceived = this.MessageRecieved;
messageSent = this.MessageSent;
ReadBitValue = this.readBitValue;
Read32FloatValue = this.read32FloatValue;
Read32InFloatValue = this.read32InFloatValue;
Read32Value = this.read32Value;
Read16Value = this.read16Value;
SerialComms = new USBSerialComms(this);
Factory mbFactory = new Factory();
var json = System.IO.File.ReadAllText(@"c:\users\kevin\desktop\modbus.json");
var objects = JArray.Parse(json); // parse as array
foreach (JObject root in objects)
{
foreach (KeyValuePair <String, JToken> app in root)
{
var n = app.Key;
var appName = app.Key;
var type = (String)app.Value["Type"];
byte device = (byte)app.Value["Device"];
byte writeCmnd = (byte)app.Value["WriteCmnd"];
byte readCmnd = (byte)app.Value["ReadCmnd"];
byte addHi = (byte)app.Value["addHi"];
byte addLo = (byte)app.Value["addLo"];
ModbusObjInitializer init = new ModbusObjInitializer(type, device, writeCmnd, readCmnd, addHi, addLo);
MBLst.Add(mbFactory.GetModbusObj(init));
}
}
}
public void checkConns()
{
if (!bInsideCheckConns)
{
bInsideCheckConns = true;
while ((bCheckConnsCheckAgain) || (bInsideCheckConns))
{
try
{
if (_serialPort.IsOpen)
{
_serialPort.Close(); //doing this early on to reduce likelyhood of trying to write to closed port which throws unrecoverable error
_serialPort.Dispose();
}
}
catch
{
//unplugging USB Serial ports (which is what our PLCs act like) will cause an exception. This try/catch lets the program continue after an exception.
}
try
{
String[] portNames = SerialPort.GetPortNames();
//ArrayList alCommPortInfo = new ArrayList();
List <COMPortInfo> alCommPortInfo = new List <COMPortInfo>();
foreach (String s in portNames)
{
// s is like "COM14"
COMPortInfo ci = new COMPortInfo();
ci.portName = s;
ci.friendlyName = s;
alCommPortInfo.Add(ci);
}
String[] usbDevs = USBSerialComms.GetUSBCOMDevices();
foreach (String s in usbDevs)
{
// Name will be like "USB Bridge (COM14)"
int start = s.IndexOf("(COM") + 1;
if (start >= 0)
{
int end = s.IndexOf(")", start + 3);
if (end >= 0)
{
// cname is like "COM14"
String cname = s.Substring(start, end - start);
for (int i = 0; i < alCommPortInfo.Count; i++)
{
if (((COMPortInfo)alCommPortInfo[i]).portName == cname)
{
((COMPortInfo)alCommPortInfo[i]).friendlyName = s;
}
}
}
}
}
int iCommNumTemp = -1;
for (int i = 0; i < alCommPortInfo.Count; i++)
{
COMPortInfo myPort = (COMPortInfo)alCommPortInfo[i];
if (myPort.friendlyName.Contains("VelocioComm"))
{
String sCommNum = myPort.portName;
sCommNum = sCommNum.Remove(0, 3);
iCommNumTemp = Int32.Parse(sCommNum);
break;
}
}
if ((iCommNumTemp != iCommNum) ||
((iCommNumTemp == -1) && (bDevicePluggedIn == true)) ||
((iCommNumTemp != -1) && (bDevicePluggedIn == false)))
{
if (iCommNumTemp == -1)
{
form.Invoke(new delegateUpdateUSBEnabled(updateUSBEnabled), false);
}
else
{
form.Invoke(new delegateUpdateUSBEnabled(updateUSBEnabled), true);
_serialPort = new SerialPort("COM" + iCommNumTemp.ToString(), 115200, Parity.None, 8, StopBits.One);
_serialPort.Handshake = Handshake.None;
if (!_serialPort.IsOpen)
{
_serialPort.Open();
_serialPort.DataReceived += new SerialDataReceivedEventHandler(_serialPort_DataReceived);
iCommNum = iCommNumTemp;
}
}
}
}
catch
{
//unplugging USB Serial ports (which is what our PLCs act like) will cause an exception. This try/catch lets the program continue after an exception.
form.Invoke(new delegateUpdateUSBEnabled(updateUSBEnabled), false);
}
if (bCheckConnsCheckAgain)
{
bCheckConnsCheckAgain = false;
}
else
{
bInsideCheckConns = false;
}
}
}
else
{
bCheckConnsCheckAgain = true;
}
}
