private void PeriodicTimerCallback(ThreadPoolTimer timer)
{
if (_cancelRequested == false)
{
// get exclusive use of port
_adapter.beginExclusive(true);
// open a path to the temp device
_path.open();
// check if present
if (_owc.Present)
{
// read the temp device
byte[] state = _tc.readDevice();
_tc.doTemperatureConvert(state);
state = _tc.readDevice();
Debug.WriteLine("Temperature of " + _address + " is " + _tc.getTemperature(state) + " C");
}
else
{
Debug.WriteLine("Device " + _address + " not present so stopping thread");
}
// close the path to the device
_path.close();
// release exclusive use of port
_adapter.endExclusive();
}
else
{
_periodicTimer.Cancel();
var settings = ApplicationData.Current.LocalSettings;
var key = _taskInstance.Task.Name;
//
// Write to LocalSettings to indicate that this background task ran.
//
settings.Values[key] = "Canceled with reason: " + _cancelReason.ToString();
Debug.WriteLine("Background " + _taskInstance.Task.Name + settings.Values[key]);
//
// Indicate that the background task has completed.
//
_deferral.Complete();
}
}
/// <summary>
/// Search a given path for an XML file.
/// </summary>
/// <param name="currentPathIndex"> index into the 'paths' Vector that
/// indicates what 1-Wire path to search for XML files </param>
/// <returns> true if the current path provided has been
/// completely checked for XML files. false if
/// if this current path should be searched further </returns>
public static bool pathXMLSearchComplete(int currentPathIndex)
{
OneWireContainer owd = null, check_owd = null;
ParseContainer pc = null, check_pc = null;
OWFileInputStream file_stream = null;
bool rslt = true;
bool xml_parsed = false;
try
{
main_Renamed.Status = "Waiting for 1-Wire available";
// get exclusive use of adapter
adapter.beginExclusive(true);
main_Renamed.Status = "Exclusive 1-Wire aquired";
// open the current path to the device
OWPath owpath = (OWPath)paths[currentPathIndex];
owpath.open();
main_Renamed.Status = "Path opened: " + owpath.ToString();
// setup search
adapter.setSearchAllDevices();
adapter.targetAllFamilies();
adapter.Speed = DSPortAdapter.SPEED_REGULAR;
// find all devices, update parseLog and get a device filesystem to check
for (System.Collections.IEnumerator owd_enum = adapter.AllDeviceContainers; owd_enum.MoveNext();)
{
owd = (OneWireContainer)owd_enum.Current;
long key = owd.AddressAsLong;
main_Renamed.Status = "Device Found: " + owd.AddressAsString;
// check to see if this is in the parseLog, add if not there
pc = null;
parseLog.TryGetValue(key, out pc);
if (pc == null)
{
main_Renamed.Status = "Device is new to parse: " + owd.AddressAsString;
pc = new ParseContainer(owd);
parseLog.Add(key, pc);
}
else
{
main_Renamed.Status = "Device " + owd.AddressAsString + " with count " + pc.attemptCount;
}
// if attemptCount is low then check it later for XML files
if (pc.attemptCount < ParseContainer.MAX_ATTEMPT)
{
check_owd = owd;
check_pc = pc;
}
}
// check if there is anything to open
if (check_owd != null)
{
// result is false because found something to try and open
rslt = false;
main_Renamed.Status = "Attempt to open file TAGX.000";
// attempt to open a 'TAGX.000' file, (if fail update parse_log)
try
{
file_stream = new OWFileInputStream(check_owd, "TAGX.0");
main_Renamed.Status = "Success file TAGX.000 opened";
}
catch (OWFileNotFoundException)
{
file_stream = null;
check_pc.attemptCount++;
main_Renamed.Status = "Could not open TAGX.000 file";
}
}
// try to parse the file, (if fail update parse_log)
if (file_stream != null)
{
// create the tagParser
// (this should not be necessary but the parser currently holds state)
parser = new TAGParser(adapter);
// attempt to parse it, on success max out the attempt
if (parseStream(parser, file_stream, owpath, true))
{
xml_parsed = true;
check_pc.attemptCount = ParseContainer.MAX_ATTEMPT;
}
else
{
check_pc.attemptCount++;
}
// close the file
try
{
file_stream.close();
}
catch (IOException)
{
main_Renamed.Status = "Could not close TAGX.000 file";
}
}
// close the path
owpath.close();
main_Renamed.Status = "Path closed";
// update the main paths listbox if XML file found
if (xml_parsed)
{
// add the paths to the main window
main_Renamed.clearPathList();
for (int p = 0; p < paths.Count; p++)
{
main_Renamed.addToPathList(((OWPath)paths[p]).ToString());
}
}
}
catch (OneWireException e)
{
Debug.WriteLine(e);
main_Renamed.Status = e.ToString();
}
finally
{
// end exclusive use of adapter
adapter.endExclusive();
main_Renamed.Status = "Exclusive 1-Wire aquired released";
}
return(rslt);
}
