private bool StateMachine_ConnectionCheck(StepDefinition currentStep)
{
// it has been long enough, we need to test the connection
if (CurrentConnection?.SendConnectionTest() == true)
{
if (IsConnected)
{
return(StepReturn.RepeatStep);
}
IsConnected = true;
RunConnectionUpdate();
}
else
{
if (IsConnected)
{
IsConnected = false;
RunConnectionUpdate();
}
if (TargetMode != ConnectionMode.PersistentPort)
{
currentStep.SkipDelayTime = true;
MachineFunctions.JumpToFirst(currentStep);
}
else
{
// see if the port is still listed in the registry
if (ComPortInfo.GetDescriptions().FirstOrDefault(x => x.Port == PortName) != null)
{
return(StepReturn.RepeatStep);
}
// if the port is no longer there, we know the port was removed from the system
currentStep.SkipDelayTime = true;
MachineFunctions.JumpToFirst(currentStep);
}
return(StepReturn.JumpCommandUsed);
}
// this step should never move on automatically
return(StepReturn.RepeatStep);
}
/// <summary>
/// Gets a list of COMPortInfo objects. This contains a port name and description of every com port in the system, including ones in use.
/// </summary>
/// <returns></returns>
public static List <ComPortInfo> GetDescriptions()
{
var comPortInfoList = new List <ComPortInfo>();
var options = ProcessConnection.ProcessConnectionOptions();
var connectionScope = ProcessConnection.ConnectionScope(Environment.MachineName, options, @"\root\CIMV2");
var objectQuery = new ObjectQuery("SELECT * FROM Win32_PnPEntity WHERE ClassGuid=\"{4d36e978-e325-11ce-bfc1-08002be10318}\"");
var comPortSearcher = new ManagementObjectSearcher(connectionScope, objectQuery);
using (comPortSearcher)
{
foreach (var obj in comPortSearcher.Get())
{
if (obj["Caption"]?.ToString().Contains("COM") != true)
{
continue;
}
var comPortInfo = new ComPortInfo
{
Manufacturer = obj["Manufacturer"]?.ToString(),
Caption = obj["Caption"]?.ToString(),
DeviceId = obj["DeviceID"]?.ToString(),
Description = obj["Description"]?.ToString(),
Name = obj["Name"]?.ToString()
};
comPortInfo.Caption = obj["Caption"]?.ToString();
var tempString = comPortInfo.Caption.Substring(comPortInfo.Caption.IndexOf("(", StringComparison.Ordinal) + 1);
tempString = tempString.Substring(0, tempString.IndexOf(")", StringComparison.Ordinal));
comPortInfo.Port = tempString;
if (comPortInfo.DeviceId?.Contains("VID") == true)
{
comPortInfo.Vid = comPortInfo.DeviceId.Substring(comPortInfo.DeviceId.IndexOf("VID", StringComparison.Ordinal) + 4, 4);
}
if (comPortInfo.DeviceId?.Contains("PID") == true)
{
comPortInfo.Pid = comPortInfo.DeviceId.Substring(comPortInfo.DeviceId.IndexOf("PID", StringComparison.Ordinal) + 4, 4);
}
if (comPortInfo.Manufacturer?.Contains("FTDI") == true)
{
tempString = comPortInfo.DeviceId?.Substring(comPortInfo.DeviceId.IndexOf("PID", StringComparison.Ordinal) + 9);
if (tempString != null)
{
var tempInt = tempString.IndexOf("\\", StringComparison.Ordinal);
if (tempInt > 0)
{
tempString = tempString.Substring(0, tempInt);
comPortInfo.Serial = tempString;
}
}
}
comPortInfoList.Add(comPortInfo);
}
}
return(comPortInfoList.OrderBy(x => x.Description).ToList());
}
private bool StateMachine_Searching(StepDefinition currentStep)
{
// get list of current system com ports
var descriptions = ComPortInfo.GetDescriptions();
// clear out any old connections
if (IsOpen)
{
IsConnected = false;
CurrentConnection?.Disconnect();
}
RunConnectionUpdate();
switch (TargetMode)
{
case ConnectionMode.AnyCom:
CurrentConnection = AutoConnectComPort(
descriptions.Select(s => s.Port).ToList(),
ConnectionParameters);
break;
case ConnectionMode.SelectionRule:
CurrentConnection = AutoConnectComPort(
descriptions.Where(TargetSelectionRule).Select(s => s.Port).ToList(),
ConnectionParameters);
break;
case ConnectionMode.PersistentPort:
descriptions = descriptions.Where(TargetSelectionRule).ToList();
if (descriptions.Count == 1)
{
CurrentConnection = ConnectComPort(
descriptions.Select(s => s.Port).First(),
ConnectionParameters);
CurrentConnection?.Connect();
if (CurrentConnection?.IsConnected != true)
{
CurrentConnection?.Disconnect();
CurrentConnection = null;
}
}
else if (descriptions.Count > 1)
{
MachineFunctions.JumpToLast(currentStep);
return(StepReturn.JumpCommandUsed);
}
break;
default:
break;
}
// if we didn't open a port, try again
if (!IsOpen)
{
return(StepReturn.RepeatStep);
}
// we opened a port, so update the listeners
ConnectionEventRegister();
RunConnectionUpdate();
// move to the next step
return(StepReturn.ContinueToNext);
}