private bool CheckValidNanoFrameworkNetworkDevice(
NanoDevice <NanoNetworkDevice> device)
{
bool validDevice = false;
// store device ID
string deviceId = device.DeviceId;
try
{
// sanity check for invalid or null device
validDevice = ValidateDevice(device, deviceId);
if (validDevice)
{
// there should be a valid nanoFramework device at the other end
// store connection ID
device.ConnectionId = deviceId;
// store device in cache
var cachedDevice = new CachedDeviceInfo(
device.TargetName,
device.Platform);
_devicesCache.TryAdd(
deviceId,
cachedDevice);
// disconnect device
device.DebugEngine.Stop(true);
}
else
{
// remove from cache
_devicesCache.TryRemove(deviceId, out var dummy);
device.DebugEngine?.Stop();
device.DebugEngine?.Dispose();
device.DebugEngine = null;
device.Device?.Dispose();
}
}
catch (Exception /* ex */
) // we could eat simple programming errors here - like a bad cast or other problem when changing code
{
// "catch all" required because the device open & check calls might fail for a number of reasons
// if there is a deviceID, remove it from cache, just in case
if (deviceId != null)
{
_devicesCache.TryRemove(deviceId, out var dummy);
}
try
{
device.DebugEngine?.Stop();
device.DebugEngine?.Dispose();
device.DebugEngine = null;
device.Device?.Dispose();
}
catch
{
// catch all trying to get rid of the device
}
}
return(validDevice);
}
private bool CheckValidNanoFrameworkSerialDevice(
NanoDevice <NanoSerialDevice> device,
bool longDelay = false)
{
bool validDevice = false;
bool isKnownDevice = false;
// store device ID
string deviceId = device.DeviceId;
try
{
// sanity check for invalid or null device base
if ((SerialPort)device.DeviceBase != null)
{
// check if this device is on cache
isKnownDevice = _devicesCache.TryGetValue(deviceId, out var cachedDevice);
// need to go through all the valid baud rates: 921600, 460800 and 115200.
foreach (int baudRate in PortSerial.ValidBaudRates)
{
if (device.DebugEngine == null)
{
device.CreateDebugEngine();
}
if (isKnownDevice)
{
// OK to go with stored cache
((SerialPort)device.DeviceBase).BaudRate = cachedDevice.BaudRate;
}
else
{
((SerialPort)device.DeviceBase).BaudRate = baudRate;
}
// better flush the UART FIFOs
((SerialPort)device.DeviceBase).DiscardInBuffer();
((SerialPort)device.DeviceBase).DiscardOutBuffer();
OnLogMessageAvailable(NanoDevicesEventSource.Log.CheckingValidDevice($" {deviceId} @ { baudRate }"));
// try to "just" connect to the device meaning...
// ... don't request capabilities or force anything except the absolute minimum required, plus...
// ... it's OK to use a very short timeout as we'll be exchanging really short packets with the device
if (device.DebugEngine.Connect(
longDelay ? 2 * NanoSerialDevice.SafeDefaultTimeout : NanoSerialDevice.SafeDefaultTimeout))
{
if (isKnownDevice)
{
// skip getting properties from device
device.TargetName = cachedDevice.TargetName;
device.Platform = cachedDevice.PlatformName;
validDevice = true;
break;
}
// set retry policies
var targetInfoPropertiesPolicy = Policy.Handle <NullReferenceException>().OrResult <CLRCapabilities.TargetInfoProperties>(r => r.TargetName == null)
.WaitAndRetry(2, retryAttempt => TimeSpan.FromMilliseconds((retryAttempt + 1) * 200));
var targetInfoPolicy = Policy.Handle <NullReferenceException>().OrResult <TargetInfo>(r => r.TargetName == null)
.WaitAndRetry(2, retryAttempt => TimeSpan.FromMilliseconds((retryAttempt + 1) * 200));
var targetReleaseInfoPolicy = Policy.Handle <NullReferenceException>().OrResult <ReleaseInfo>(r => r == null)
.WaitAndRetry(2, retryAttempt => TimeSpan.FromMilliseconds((retryAttempt + 1) * 200));
if (device.DebugEngine.IsConnectedTonanoBooter)
{
// try first with new command
var targetInfo = targetInfoPolicy.Execute(() => device.DebugEngine.GetMonitorTargetInfo());
if (targetInfo != null)
{
device.TargetName = targetInfo.TargetName;
device.Platform = targetInfo.PlatformName;
}
else
{
// try again with deprecated command
var deviceInfo = targetReleaseInfoPolicy.Execute(() => device.DebugEngine.GetMonitorOemInfo());
if (deviceInfo != null)
{
device.TargetName = deviceInfo.TargetName;
device.Platform = deviceInfo.PlatformName;
}
}
}
else
{
var deviceInfo = targetInfoPropertiesPolicy.Execute(() =>
{
if (device.DebugEngine != null)
{
return(device.DebugEngine.GetTargetInfo());
}
else
{
return(new CLRCapabilities.TargetInfoProperties());
}
});
if (!string.IsNullOrEmpty(deviceInfo.TargetName))
{
device.TargetName = deviceInfo.TargetName;
device.Platform = deviceInfo.Platform;
}
}
if (string.IsNullOrEmpty(device.TargetName) ||
string.IsNullOrEmpty(device.Platform))
{
OnLogMessageAvailable(NanoDevicesEventSource.Log.CriticalError($"ERROR: {device.DeviceId} failed to get target information"));
validDevice = false;
break;
}
else
{
validDevice = true;
break;
}
}
}
}
if (validDevice)
{
// there should be a valid nanoFramework device at the other end
device.SerialNumber = GetSerialNumber(deviceId);
// store valid baud rate from device detection
((PortSerial)device.ConnectionPort).BaudRate = ((SerialPort)device.DeviceBase).BaudRate;
// store connection ID
device.ConnectionId = deviceId;
// store device in cache
var cachedDevice = new CachedDeviceInfo(
device.TargetName,
device.Platform,
((SerialPort)device.DeviceBase).BaudRate);
_devicesCache.TryAdd(
deviceId,
cachedDevice);
// disconnect device
device.DebugEngine.Stop(true);
}
else
{
// remove from cache
_devicesCache.TryRemove(deviceId, out var dummy);
device.DebugEngine?.Stop();
device.DebugEngine?.Dispose();
device.DebugEngine = null;
if (device.DeviceBase != null)
{
((SerialPort)device.DeviceBase).Close();
((SerialPort)device.DeviceBase).Dispose();
device.DeviceBase = null;
}
}
}
catch (Exception /* ex */) // we could eat simple programming errors here - like a bad cast or other problem when changing code
{
// "catch all" required because the device open & check calls might fail for a number of reasons
// if there is a deviceID, remove it from cache, just in case
if (deviceId != null)
{
_devicesCache.TryRemove(deviceId, out var dummy);
}
try
{
device.DebugEngine?.Stop();
device.DebugEngine?.Dispose();
device.DebugEngine = null;
if (device.DeviceBase != null)
{
((SerialPort)device.DeviceBase).Close();
((SerialPort)device.DeviceBase).Dispose();
device.DeviceBase = null;
}
}
catch
{
// catch all trying to get rid of the device
}
}
return(validDevice);
}
