public RacesViewModel()
{
TagOperationsViewModel = new TagOperationsViewModel();
StartEncodingCommand = new DelegateCommand(StartEncoding, () =>/*true*/
TagOperationsViewModel.IsConnected);
NewProjectCommand = new DelegateCommand(NewProject);
SelectedRaceChangedCommand = new DelegateCommand(SelectedRaceChanged);
SelectedTagChangedCommand = new DelegateCommand(SelectedTagChanged);
}
private void StartEncoding()
{
if (IsEncoding)
{
IsEncoding = false;
StatusBarText = "Encoding stopped";
StatusBarBackground = Brushes.Green;
return;
}
if (string.IsNullOrEmpty(TagOperationsViewModel.SelectedRegion) ||
TagOperationsViewModel.SelectedRegion == "Select")
{
MessageBox.Show("Please, select the region first.", "Information", MessageBoxButton.OK,
MessageBoxImage.Information);
//return;
}
Task.Factory.StartNew(() =>
{
do
{
//1. Wait for Tag
Application.Current.Dispatcher.Invoke(() =>
{
IsEncoding = true;
StatusBarText = "Waiting for tag...";
StatusBarBackground = Brushes.Yellow;
});
//2. Read tag
var tag = TagOperationsViewModel.ReadTagSync();
//3. if epc tag is in the number set to be encoded as defined by the project (i.e. 12301020) this indicates it is already encoded,
//3a. show 'already encoded as 1020'
//3b. return to 1.
if (!IsEncoding)
{
if (tag.HasValue && !OverrideTags && CheckRepeatedTag(tag))
{
StatusBarText = "Tag " + tag + " is already encoded";
StatusBarBackground = Brushes.OrangeRed;
Speak("Already encoded");
Thread.Sleep(300);
continue;
}
}
var apLocked = false;
//4. determine if access password is locked. In URA I see 'Gen2 memory locked' in Reserved Memory Bank (0) access password.
if (TagOperationsViewModel.CheckAccessPasswordIsLocked())
{
//4a. if access password locked, try the current access password from 'new project dialogue'
//which has yet to be created. if fails, open dialogue to ask for old access password. Remember this password for
//future uses of this dialogue.
if (!TagOperationsViewModel.ApplyLockAction
(new Gen2.LockAction(Gen2.LockAction.ACCESS_UNLOCK), _totalRaceInfo.AccessPassword))
{
//open dialog
var dialog = new NewPasswordWnd(_totalRaceInfo.AccessPassword);
if (dialog.ShowDialog().GetValueOrDefault(false))
{
if (!TagOperationsViewModel.ApplyLockAction
(new Gen2.LockAction(Gen2.LockAction.ACCESS_UNLOCK), dialog.Password))
{
// failed again
// check if epc is locked
// if locked -> invalid chip -> continue
if (TagOperationsViewModel.CheckEpcIsLocked(dialog.Password))
{
StatusBarText = "Invalid chip, continue...";
StatusBarBackground = Brushes.Red;
Speak("Invalid chip");
Thread.Sleep(300);
continue;
}
//if not locked ask for continue without locking
else
{
if (MessageBox.Show("EPC is not locked. Continue without locking?", "Question",
MessageBoxButton.YesNo, MessageBoxImage.Question) == MessageBoxResult.Yes)
{
//if yes
apLocked = true;
}
//if no -> continue
else
{
Thread.Sleep(300);
continue;
}
}
}
}
else
{
}
}
}
//4b. if access password is not locked, encode access password =
//#8 digits from access password dialogue needed in 'new project' screen# .
if (!apLocked)
{
TagOperationsViewModel.WriteAccessPassword(_totalRaceInfo.AccessPassword);
}
//5. encode tag to proper number
var encoded = TagOperationsViewModel.WriteTag(NextTagNumber);
if (encoded && !apLocked)
{
//6. lock epc memory (tag) with write lock. Gen2.LockAction.EPC_LOCK
TagOperationsViewModel.ApplyLockAction(
new Gen2.LockAction(Gen2.LockAction.EPC_LOCK), _totalRaceInfo.AccessPassword);
//7. lock access password with read/write lock. Gen2.LockAction.ACCESS_LOCK
TagOperationsViewModel.ApplyLockAction(
new Gen2.LockAction(Gen2.LockAction.ACCESS_LOCK), _totalRaceInfo.AccessPassword);
//8. set kill password =#8 digits from kill password dialogue needed in 'new project' screen#
TagOperationsViewModel.WriteKillPassword(_totalRaceInfo.KillPassword);
//9. lock kill password with read/write lock. Gen2.LockAction.LILL_LOCK
TagOperationsViewModel.ApplyLockAction(
new Gen2.LockAction(Gen2.LockAction.KILL_LOCK), _totalRaceInfo.AccessPassword);
}
Application.Current.Dispatcher.Invoke(() =>
{
SelectedRace.TagList[SelectedTagIndex] = NextTagNumber;
if (encoded)
{
StatusBarText = "Successfully encoded!";
StatusBarBackground = Brushes.LawnGreen;
}
else
{
StatusBarText = "Encoding error, trying again...";
StatusBarBackground = Brushes.Red;
}
});
if (encoded)
{
//10. re-read tag to validate that it is properly coded.
StatusBarText = "Verifying...";
StatusBarBackground = Brushes.Orange;
encoded = TagOperationsViewModel.VerifyTag(NextTagNumber);
}
//11. have computer speak the last two digits of the number.
if (encoded || Debugger.IsAttached)
{
SayNumber(NextTagNumber);
WriteToFile();
//12. increment to next tag
TotalRaceInfo.FireNextTag(NextTagNumber);
}
Thread.Sleep(300);
} while (IsEncoding);
}
);
}
