private void Acquire()
{
try
{
// lock a monitor onto the acquisitor, to synchronise with the controller
// when acquiring a set number of scans - the monitor is released in
// AcquisitionFinishing()
Monitor.Enter(AcquisitorMonitorLock);
// initialise all of the plugins
config.outputPlugin.AcquisitionStarting();
config.pgPlugin.AcquisitionStarting();
config.shotGathererPlugin.AcquisitionStarting();
config.switchPlugin.AcquisitionStarting();
config.yagPlugin.AcquisitionStarting();
config.analogPlugin.AcquisitionStarting();
for (int scanNumber = 0 ;; scanNumber++)
{
// prepare for the scan start
config.outputPlugin.ScanStarting();
config.pgPlugin.ScanStarting();
config.shotGathererPlugin.ScanStarting();
config.switchPlugin.ScanStarting();
config.yagPlugin.ScanStarting();
config.analogPlugin.ScanStarting();
for (int pointNumber = 0 ; pointNumber < (int)config.outputPlugin.Settings["pointsPerScan"] ; pointNumber++)
{
// calculate the new scan parameter and move the scan along
config.outputPlugin.ScanParameter = NextScanParameter(pointNumber, scanNumber);
// check for a change in the pg parameters
lock(this)
{
if (tweakFlag)
{
// now it's safe to update the pattern generator settings
// and ask the pg to reload
SettingsReflector sr = new SettingsReflector();
sr.SetField(config.pgPlugin,
latestTweak.parameter, latestTweak.newValue.ToString());
config.pgPlugin.ReloadPattern();
tweakFlag = false;
}
}
ScanPoint sp = new ScanPoint();
sp.ScanParameter = config.outputPlugin.ScanParameter;
for (int shotNum = 0; shotNum < (int)(config.outputPlugin.Settings["shotsPerPoint"]); shotNum++)
{
// Set the switch state
config.switchPlugin.State = true;
// wait for the data gatherer to finish
config.shotGathererPlugin.ArmAndWait();
// read out the data
sp.OnShots.Add(config.shotGathererPlugin.Shot);
if ((bool)config.switchPlugin.Settings["switchActive"])
{
config.switchPlugin.State = false;
config.shotGathererPlugin.ArmAndWait();
sp.OffShots.Add(config.shotGathererPlugin.Shot);
}
}
// sample the analog channels and add them to the ScanPoint
config.analogPlugin.ArmAndWait();
sp.Analogs.AddRange(config.analogPlugin.Analogs);
// send up the data bundle
DataEventArgs evArgs = new DataEventArgs();
evArgs.point = sp;
OnData(evArgs);
// check for exit
if (CheckIfStopping())
{
AcquisitionFinishing(config);
return;
}
}
// prepare for the start of the next scan
OnScanFinished();
config.pgPlugin.ScanFinished();
config.yagPlugin.ScanFinished();
config.outputPlugin.ScanFinished();
config.shotGathererPlugin.ScanFinished();
config.switchPlugin.ScanFinished();
config.analogPlugin.ScanFinished();
// I think that this pause will workaround an annoying threading bug
// I should probably be less cheezy and put a lock in, but I'm not really
// sure that I know what the bug is as it's intermittent (and rare).
Thread.Sleep(750);
// check if we are finished scanning
if (scanNumber + 1 == numberOfScans)
{
backendState = AcquisitorState.stopped;
// set the controller state to stopped
Controller.GetController().appState = Controller.AppState.stopped;
AcquisitionFinishing(config);
return;
}
}
}
catch (Exception e)
{
// last chance exception handler - this stops a rogue exception in the
// acquire loop from killing the whole program
Console.Error.Write(e.Message + e.StackTrace);
MessageBox.Show("Exception caught in acquire loop.\nTake care - the program " +
"is probably unstable.\n" + e.Message + "\n" + e.StackTrace, "Acquire error",
MessageBoxButtons.OK, MessageBoxIcon.Error);
// Try and stop the pattern gracefully before the program dies
config.pgPlugin.AcquisitionFinished();
lock (this) backendState = AcquisitorState.stopped;
}
}
// change a parameter in the current profile. The way that the plugin is selected is a cheesy hack -
// clearly the commandProcessor/pluginManager/settingsReflector design is inadequate
// The group mode flag is also a cheesy hack, but might be quite useful
public void AdjustProfileParameter(String plugin, String parameter, String newValue, bool groupMode)
{
SettingsReflector sr = new SettingsReflector();
if (!groupMode)
{
sr.SetField(profileManager.Processor.PluginForString(profileManager.CurrentProfile, plugin),
parameter, newValue);
}
else
{
ArrayList profiles = profileManager.ProfilesInGroup(profileManager.CurrentProfile.Group);
foreach (Profile p in profiles)
sr.SetField(profileManager.Processor.PluginForString(p, plugin), parameter, newValue);
}
}