static void TestWeakRef()
{
_ref =
ExtendedWeakReference.RecoverOrCreate(
typeof(TypeUniqueToOurApp), //作为标识的类
0, //ID标识，这个比较有用
ExtendedWeakReference.c_SurvivePowerdown);
//数据重要次序：OkayToThrowAway->NiceToHave->Important->Critical->System
_ref.Priority = (Int32)ExtendedWeakReference.PriorityLevel.Important;
//获取数据
var numBoots = (NumBoots)_ref.Target;
if (numBoots == null)
{
Debug.Print("the first time!");
numBoots = new NumBoots(1);
}
else
{
numBoots = new NumBoots(numBoots.BootCount + 1);
Debug.Print("This is boot #" + numBoots.BootCount);
}
//保存数据
_ref.Target = numBoots;
//延时等待保存
Thread.Sleep(2000);
}
internal X509Certificate Get(string certName)
{
int idx = m_names.IndexOf(certName);
if (-1 == idx)
{
return(null);
}
ExtendedWeakReference ewr = ExtendedWeakReference.Recover(typeof(_CertStore_), (uint)m_values[idx]);
if (ewr == null)
{
return(null);
}
X509Certificate cert = ewr.Target as X509Certificate;
if (cert.Issuer == null || cert.Issuer.Length == 0)
{
cert.Initialize();
}
ewr.PushBackIntoRecoverList();
return(cert);
}
private static void LoadLCDSettings()
{
// Grab the data
_lcdEwrSettings = ExtendedWeakReference.RecoverOrCreate(typeof(LcdEwr), 0, ExtendedWeakReference.c_SurvivePowerdown);
_lcdEwrSettings.Priority = (Int32)ExtendedWeakReference.PriorityLevel.Critical;
_lcd = (LCDSettings)_lcdEwrSettings.Target;
}
/// <summary>
/// Static constructor so that we can load the certificate map from EWR prior to usage.
/// </summary>
static CertificateStore()
{
s_ewrCertLookup = ExtendedWeakReference.RecoverOrCreate(typeof(_CertLookup_), (uint)0, ExtendedWeakReference.c_SurvivePowerdown);
if (s_ewrCertLookup.Target == null)
{
s_ewrCertLookup.Priority = (int)ExtendedWeakReference.PriorityLevel.Critical;
s_personalCertData = new _CertLookup_();
s_ewrCertLookup.Target = s_personalCertData;
}
else
{
s_personalCertData = s_ewrCertLookup.Target as _CertLookup_;
}
s_ewrCALookup = ExtendedWeakReference.RecoverOrCreate(typeof(_CertLookup_), (uint)1, ExtendedWeakReference.c_SurvivePowerdown);
if (s_ewrCALookup.Target == null)
{
s_ewrCALookup.Priority = (int)ExtendedWeakReference.PriorityLevel.Critical;
s_CACertData = new _CALookup_();
s_ewrCALookup.Target = s_CACertData;
}
else
{
s_CACertData = s_ewrCALookup.Target as _CALookup_;
}
}
/// <summary>
/// The execution entry point.
/// </summary>
public static void Main()
{
// We are booting; try to retrieve the boot count.
s_numBootsExtendedWeakReference =
ExtendedWeakReference.RecoverOrCreate(
typeof(TypeUniqueToOurApp), // The unique type that identifies the data.
0, // The ID of the specific data item.
ExtendedWeakReference.c_SurvivePowerdown); // The CLR should try to persist data across a reboot.
// Indicate how important this data is. The CLR discards
// OkayToThrowAway items first, then NiceToHave items, then
// Important items, then Critical items, and finally System items.
// In practice, System items are virtually never discarded.
s_numBootsExtendedWeakReference.Priority =
(Int32)ExtendedWeakReference.PriorityLevel.Important;
// Try to get the persisted data, initializing it if it is not
// available. The Target property of the extended weak reference
// must be cast to the actual type of the object. The Target
// property is cast to prevent the object from being
// garbage-collected unexpectedly.
NumBoots numBoots = (NumBoots)s_numBootsExtendedWeakReference.Target;
if (numBoots == null)
{
// The object could not be found in flash memory, so create the
// object and initialize it.
Debug.Print(
"The device was booted for the first time, or the boot counter was lost. Initializing the boot counter to 1.");
numBoots = new NumBoots(1);
}
else
{
// The object was found in flash memory; increment the boot
// counter.
numBoots = new NumBoots(numBoots.BootCount + 1);
Debug.Print("Successfully read boot counter. This is boot #" +
numBoots.BootCount);
}
// Set the Target property of the extended weak reference to the
// boot count object, triggering persistence.
s_numBootsExtendedWeakReference.Target = numBoots;
// The CLR needs some time to asynchronously store the data in
// flash. In this sample application, we use a two-second Sleep.
// A real application would simply continue without delay. This app
// only needs to sleep because the application is about to end.
// The system provides no guarantee about when the data will
// actually be stored in flash memory. When the data is actually
// stored depends on the size of the object and the speed of the
// flash memory.
System.Threading.Thread.Sleep(2000);
}
/// <summary>
/// Save addres mapping to persistent storage
/// </summary>
public void Save()
{
#if MICROFRAMEWORK
ExtendedWeakReference ewr = ExtendedWeakReference.RecoverOrCreate(typeof(Addresses), 0, ExtendedWeakReference.c_SurvivePowerdown);
if (ewr != null)
{
ewr.Priority = (int)ExtendedWeakReference.PriorityLevel.System;
ewr.Target = _addresses;
ewr.PushBackIntoRecoverList();
}
#endif
}
/// <summary>
/// Load address mapping from persistent storage
/// </summary>
public void Load()
{
#if MICROFRAMEWORK
ExtendedWeakReference ewr = ExtendedWeakReference.Recover(typeof(Addresses), 0);
if (ewr != null)
{
Addresses addr = ewr.Target as Addresses;
if (addr != null)
{
_addresses = addr;
}
}
#endif
}
public static object LoadFromFlash(Type dataType, uint id)
{
ewr = ExtendedWeakReference.RecoverOrCreate(dataType, id, ExtendedWeakReference.c_SurvivePowerdown | ExtendedWeakReference.c_SurviveBoot);
// Indicate how important this data is. The CLR discards from first to last:
// OkayToThrowAway items
// NiceToHave items
// Important items
// Critical items
// System items.
// In practice, System items are virtually never discarded.
ewr.Priority = (Int32)ExtendedWeakReference.PriorityLevel.System;
return(ewr.Target);
}
private uint GetNextFreeIndex()
{
uint idx = 0;
if (m_values.Count > 0)
{
idx = (uint)m_values[m_values.Count - 1] + 1;
// overflow - collapse indexes
if (idx == 0)
{
for (int i = 0; i < m_values.Count; i++)
{
// if the current index matches the lookup value then we are already in the correct position
if (idx == (uint)m_values[i])
{
idx++;
}
else
{
// collapse cert indexes
ExtendedWeakReference ewr = ExtendedWeakReference.Recover(typeof(_CertStore_), (uint)m_values[i]);
if (ewr != null)
{
X509Certificate cert = ewr.Target as X509Certificate;
ewr.Target = null;
ewr = new ExtendedWeakReference(cert, typeof(_CertStore_), idx, ExtendedWeakReference.c_SurvivePowerdown);
ewr.Priority = (int)ExtendedWeakReference.PriorityLevel.Critical;
ewr.Target = cert;
ewr.PushBackIntoRecoverList();
m_values[i] = (uint)idx;
// increment active index count only if we have a valid EWR certificate
idx++;
}
}
}
}
}
return(idx);
}
/// <summary>
/// Initializes the touch panel.
/// </summary>
public static void Initialize()
{
touchConnection = new TouchConnection();
Touch.Initialize(touchConnection);
TouchCollectorConfiguration.CollectionMode = CollectionMode.InkAndGesture;
TouchCollectorConfiguration.CollectionMethod = CollectionMethod.Native;
TouchCollectorConfiguration.SamplingFrequency = 50;
calWeakRef = ExtendedWeakReference.RecoverOrCreate(typeof(GlideCalibration), 0, ExtendedWeakReference.c_SurvivePowerdown);
calWeakRef.Priority = (Int32)ExtendedWeakReference.PriorityLevel.Important;
CalSettings = (CalibrationSettings)calWeakRef.Target;
if (CalSettings != null)
{
Touch.ActiveTouchPanel.SetCalibration(CalSettings.Points.Length, CalSettings.SX, CalSettings.SY, CalSettings.CX, CalSettings.CY);
Calibrated = true;
}
}
private static bool ValidateEWR(bool NewData)
{
bool success = true;
for (uint i = 1; i < 10; i++)
{
ewrs[i] = ExtendedWeakReference.Recover(typeof(TestObj), i);
if (ewrs[i] == null)
{
success = false;
Log.Exception("Unable to recover object #" + i + " after reboot " + runTracker.RebootCount);
ewrs[i] = ExtendedWeakReference.RecoverOrCreate(typeof(TestObj), i,
ExtendedWeakReference.c_SurviveBoot |
ExtendedWeakReference.c_SurvivePowerdown);
}
TestObj obj = (TestObj)ewrs[i].Target;
if (obj == null)
{
success = false;
Log.Exception("Recovered object #" + i + " null after reboot " + runTracker.RebootCount);
}
if (runTracker.objHashes[i] != obj.GetHashCode())
{
success = false;
Log.Exception("Recovered object #" + i + " hash value does not match stored hash value");
}
Log.Comment("Verified object #" + i);
if (NewData)
{
Log.Comment("Creating new object and setting back to ewr");
obj = new TestObj();
ewrs[i].Target = obj;
runTracker.objHashes[i] = obj.GetHashCode();
}
else
{
Log.Comment("Pushing object back into list");
ewrs[i].PushBackIntoRecoverList();
}
}
return(success);
}
private void On()
{
lock (_hal)
{
_hal._powerPort.Write(true);
Thread.Sleep(200);
SWReset();
InitRegisters();
StartOsc();
EnableInterrupts();
Channel = _channel;
Power = _rfPower;
_rxEnabled = false;
// CC2420 ext address is a random value. Recover/generate ext address from flash if needed
{
CC2420Address addr = null;
// try to recover address
ExtendedWeakReference ewr = ExtendedWeakReference.Recover(typeof(CC2420Address), 0);
if (addr != null)
{
// address recovered from flash
_hal.ExtendedAddress = addr.extAddress;
}
else
{
// save current address in flash
ewr = ExtendedWeakReference.RecoverOrCreate(typeof(CC2420Address), 0, ExtendedWeakReference.c_SurvivePowerdown);
if (ewr != null)
{
addr = new CC2420Address();
addr.extAddress = _hal.ExtendedAddress;
ewr.Priority = (int)ExtendedWeakReference.PriorityLevel.System;
ewr.Target = addr;
ewr.PushBackIntoRecoverList();
}
}
}
}
}
internal bool Update(string certName, X509Certificate cert)
{
int idx = m_names.IndexOf(certName);
if (-1 == idx)
{
return(false);
}
ExtendedWeakReference ewr = ExtendedWeakReference.Recover(typeof(_CertStore_), (uint)m_values[idx]);
if (ewr == null)
{
return(false);
}
ewr.Target = cert;
ewr.PushBackIntoRecoverList();
return(true);
}
internal bool Remove(string certName)
{
int idx = m_names.IndexOf(certName);
if (idx == -1)
{
return(false);
}
ExtendedWeakReference ewr = ExtendedWeakReference.Recover(typeof(_CertStore_), (uint)m_values[idx]);
if (ewr != null)
{
m_names.RemoveAt(idx);
m_values.RemoveAt(idx);
ewr.Target = null;
}
return(true);
}
private TetrisApp()
{
// Create the object that configures the GPIO pins to buttons.
GPIOButtonInputProvider inputProvider = new GPIOButtonInputProvider(null);
// Create ExtendedWeakReference for high score table
highScoreEWD = ExtendedWeakReference.RecoverOrCreate(
typeof(TetrisApp),
0,
ExtendedWeakReference.c_SurvivePowerdown);
// Set persistance priority
highScoreEWD.Priority = (int)ExtendedWeakReference.PriorityLevel.Important;
// Try to recover previously saved HighScore
HighScore = (HighScoreTable)highScoreEWD.Target;
// If nothing was recovered - create new
if (HighScore == null)
{
HighScore = new HighScoreTable();
}
}
private void LoadData()
{
ConfigEWR = ExtendedWeakReference.RecoverOrCreate(typeof(Config), 0, ExtendedWeakReference.c_SurviveBoot | ExtendedWeakReference.c_SurvivePowerdown);
ConfigEWR.Priority = (int)ExtendedWeakReference.PriorityLevel.Critical;
wifiNetworks.Clear();
if (EnableWifiSetupNetworks)
{
APDetails.AddSetupAPs(wifiNetworks);
}
Config config = ConfigEWR.Target as Config;
if (config == null)
{
config = new Config();
config.UniqueID = "";
var random = new Random();
for (int i = 0; i < 20; i++)
{
config.UniqueID += random.Next(10).ToString();
}
ConfigEWR.Target = config;
Debug.Print("Created new configuration in flash");
}
else
{
if (config.APDetails != null)
{
for (var i = 0; i < config.APDetails.Length; i++)
{
wifiNetworks.Insert(i, config.APDetails[i]);
Debug.Print("Loaded WiFi config for SSID " + config.APDetails[i].SSID);
}
}
}
DeviceUniqueID = config.UniqueID;
Debug.Print("Device unique ID is " + DeviceUniqueID);
}
internal bool Add(string certName, X509Certificate cert)
{
if (-1 != m_names.IndexOf(certName))
{
return(false);
}
m_names.Add(certName);
uint idx = GetNextFreeIndex();
m_values.Add(idx);
ExtendedWeakReference ewr = ExtendedWeakReference.RecoverOrCreate(typeof(_CertStore_), (uint)idx, ExtendedWeakReference.c_SurvivePowerdown);
ewr.Priority = (int)ExtendedWeakReference.PriorityLevel.Critical;
ewr.Target = cert;
ewr.PushBackIntoRecoverList();
return(true);
}
public static void Main()
{
//try to recover the data or create the weak reference
bootInfoExtendedWeakReference =
ExtendedWeakReference.RecoverOrCreate(
typeof(MyUniqueSelectorType), //unique type to prevent other code from accessing our data
0, //id that refers to the data we care about
ExtendedWeakReference.c_SurvivePowerdown | ExtendedWeakReference.c_SurviveBoot);
//set how important the data is
bootInfoExtendedWeakReference.Priority = (int)ExtendedWeakReference.PriorityLevel.Important;
//try to get the persisted data
//if we get the data, then putting it in the field myBootInfo creates a
//strong reference to it, preventing the GC from collecting it
MyBootInfo myBootInfo = (MyBootInfo)bootInfoExtendedWeakReference.Target;
if (myBootInfo == null)
{
//the data could not be obtained
Debug.Print("This is the first time the device booted or the data was lost.");
myBootInfo = new MyBootInfo(1); //first initialization
}
else
{
//the data could be obtained, display info
Debug.Print("Number of boots = " + myBootInfo.BootCount);
myBootInfo = new MyBootInfo(myBootInfo.BootCount + 1); //increment number of boots
}
//setting the Target property causes to write the data to flash memory
bootInfoExtendedWeakReference.Target = myBootInfo;
//give the system time to save it to flash
System.Threading.Thread.Sleep(2000);
}
public static void Main()
{
// This test suite does not use the Test Runner infrastructure as it requires a
// reboot of the physical device to verify the references have been saved. It relies
// on the test harness to time it out if it fails to complete because of issues with
// EWR persistence.
// Skip test on Emulator
if (Microsoft.SPOT.Hardware.SystemInfo.SystemID.SKU == 3)
{
StartTestLog("Emulator, skipping...");
EndTestLog(0, 0, 1);
}
else
{
ewrs[0] = ExtendedWeakReference.Recover(typeof(TestRunTracker), 0);
if (ewrs[0] == null)
{
ewrs[0] = ExtendedWeakReference.RecoverOrCreate(
typeof(TestRunTracker),
0,
ExtendedWeakReference.c_SurviveBoot | ExtendedWeakReference.c_SurvivePowerdown);
runTracker = new TestRunTracker()
{
RebootCount = -1, TestState = TestRunTracker.State.Initialize
};
}
else
{
runTracker = (TestRunTracker)ewrs[0].Target;
}
Log.Comment("State: " + runTracker.TestState + ", Reboot Count: " + runTracker.RebootCount);
switch (runTracker.TestState)
{
// Initial state
case TestRunTracker.State.Initialize:
if (runTracker.RebootCount == -1)
{
StartTestLog("No EWR found, initializing for first run...");
}
else
{
StartTestLog("Previous EWR found. Re-initializing...");
}
runTracker.TestState = TestRunTracker.State.HardReboot;
runTracker.RebootCount = 0;
runTracker.TestState = TestRunTracker.State.HardReboot;
for (uint i = 1; i < 10; i++)
{
ewrs[i] = ExtendedWeakReference.RecoverOrCreate(typeof(TestObj), i,
ExtendedWeakReference.c_SurvivePowerdown |
ExtendedWeakReference.c_SurviveBoot);
TestObj obj = new TestObj();
ewrs[i].Target = obj;
runTracker.objHashes[i] = obj.GetHashCode();
}
break;
// HardReboot cases - Reboots 1 - 3
case TestRunTracker.State.HardReboot:
Debug.Print("<TestMethod name=\"HardReboot" + runTracker.RebootCount + "\">");
// Validate objects
if (ValidateEWR(true))
{
Debug.Print(" <TestMethodResult Result=\"Pass\">");
runTracker.PassCount++;
}
else
{
Debug.Print(" <TestMethodResult Result=\"Fail\">");
runTracker.FailCount++;
}
Debug.Print(" <Text><![CDATA[TEST: HardReboot" + runTracker.RebootCount + "]]></Text>" + TimeStamp());
Debug.Print(" </TestMethodResult>");
Debug.Print("</TestMethod>");
// End test
if (runTracker.RebootCount >= 3)
{
runTracker.TestState = TestRunTracker.State.SoftReboot;
}
break;
// SoftReboot cases - Reboots 4 - 6
case TestRunTracker.State.SoftReboot:
Debug.Print("<TestMethod name=\"SoftReboot" + runTracker.RebootCount + "\">");
// Validate objects
if (ValidateEWR(true))
{
Debug.Print(" <TestMethodResult Result=\"Pass\">");
runTracker.PassCount++;
}
else
{
Debug.Print(" <TestMethodResult Result=\"Fail\">");
runTracker.FailCount++;
}
Debug.Print(" <Text><![CDATA[TEST: SoftReboot" + runTracker.RebootCount + "]]></Text>" + TimeStamp());
Debug.Print(" </TestMethodResult>");
Debug.Print("</TestMethod>");
// End test
if (runTracker.RebootCount >= 6)
{
runTracker.TestState = TestRunTracker.State.Restore;
}
break;
// Restore cases - Reboots 7 - 8
case TestRunTracker.State.Restore:
Debug.Print("<TestMethod name=\"Restore" + runTracker.RebootCount + "\">");
if (runTracker.RebootCount == 7)
{
Log.Comment("Restore and Pushback with Soft Reboot");
}
else
{
Log.Comment("Restore and Pushback with Hard Reboot");
}
// Validate objects
if (ValidateEWR(false))
{
Debug.Print(" <TestMethodResult Result=\"Pass\">");
runTracker.PassCount++;
}
else
{
Debug.Print(" <TestMethodResult Result=\"Fail\">");
runTracker.FailCount++;
}
Debug.Print(" <Text><![CDATA[TEST: SoftReboot" + runTracker.RebootCount + "]]></Text>" + TimeStamp());
Debug.Print(" </TestMethodResult>");
Debug.Print("</TestMethod>");
if (runTracker.RebootCount > 8)
{
runTracker.TestState = TestRunTracker.State.Complete;
}
break;
// Tests complete
case TestRunTracker.State.Complete:
runTracker.TestState = TestRunTracker.State.Initialize;
// Close logs
EndTestLog(runTracker.PassCount, runTracker.FailCount, 0);
break;
}
runTracker.RebootCount++;
ewrs[0].Target = runTracker;
// Need to sleep to make sure debug buffer has chance to flush before rebooting
// This should not be needed for EWR any longer
System.Threading.Thread.Sleep(15000);
switch (runTracker.TestState)
{
case TestRunTracker.State.HardReboot:
PowerState.RebootDevice(false);
break;
case TestRunTracker.State.SoftReboot:
PowerState.RebootDevice(true);
break;
case TestRunTracker.State.Restore:
if (runTracker.RebootCount == 8)
{
PowerState.RebootDevice(true);
}
else
{
PowerState.RebootDevice(false);
}
break;
}
// fall through to end test suite
}
}
private static void LoadCalibrationPoints()
{
ewrCalibrationPoints = ExtendedWeakReference.RecoverOrCreate(typeof(CalibrationPointsID), 0, ExtendedWeakReference.c_SurvivePowerdown | ExtendedWeakReference.c_SurviveBoot);
ewrCalibrationPoints.Priority = (int)ExtendedWeakReference.PriorityLevel.System;
calibrationPoints = (CalibrationPoints)ewrCalibrationPoints.Target;
}
public static TouchCalibrationPoints Load()
{
_ewr = ExtendedWeakReference.RecoverOrCreate(typeof(TouchCalibrationPoints), 0, ExtendedWeakReference.c_SurvivePowerdown);
_ewr.Priority = (int)ExtendedWeakReference.PriorityLevel.Important;
return(_ewr.Target == null ? null : new TouchCalibrationPoints((TouchCalibrationData)_ewr.Target));
}
