private async Task <bool> ConnectSerialDeviceAsync(SerialDeviceInformation serialDeviceInfo)
{
// try to determine if we already have this device opened.
if (EventHandlerForSerialDevice.Current.Device != null)
{
// device matches
if (EventHandlerForSerialDevice.Current.DeviceInformation == serialDeviceInfo.DeviceInformation)
{
return(true);
}
}
bool openDeviceResult = await EventHandlerForSerialDevice.Current.OpenDeviceAsync(serialDeviceInfo.DeviceInformation, serialDeviceInfo.DeviceSelector);
if (openDeviceResult)
{
OnLogMessageAvailable(NanoDevicesEventSource.Log.OpenDevice(serialDeviceInfo.DeviceInformation.Id));
}
else
{
// Most likely the device is opened by another app, but cannot be sure
OnLogMessageAvailable(NanoDevicesEventSource.Log.CriticalError($"Unknown error opening {serialDeviceInfo.DeviceInformation.Id}, possibly opened by another app"));
}
return(openDeviceResult);
}
private async Task <bool> ConnectSerialDeviceAsync(SerialDeviceInformation serialDeviceInfo)
{
// try to determine if we already have this device opened.
if (EventHandlerForSerialDevice.Current != null)
{
// device matches
if (EventHandlerForSerialDevice.Current.DeviceInformation == serialDeviceInfo.DeviceInformation)
{
return(true);
}
}
// Create an EventHandlerForDevice to watch for the device we are connecting to
EventHandlerForSerialDevice.CreateNewEventHandlerForDevice();
return(await EventHandlerForSerialDevice.Current.OpenDeviceAsync(serialDeviceInfo.DeviceInformation, serialDeviceInfo.DeviceSelector).ConfigureAwait(false));
}
private async Task <bool> ConnectSerialDeviceAsync(SerialDeviceInformation serialDeviceInfo)
{
// try to determine if we already have this device opened.
if (EventHandlerForSerialDevice.Current != null)
{
// device matches
if (EventHandlerForSerialDevice.Current.DeviceInformation == serialDeviceInfo.DeviceInformation)
{
return(true);
}
}
inputStreamReader = null;
outputStreamWriter = null;
// access the Current in EventHandlerForDevice to create a watcher for the device we are connecting to
var isConnected = EventHandlerForSerialDevice.Current.IsDeviceConnected;
return(await EventHandlerForSerialDevice.Current.OpenDeviceAsync(serialDeviceInfo.DeviceInformation, serialDeviceInfo.DeviceSelector));
}
/// <summary>
/// Creates a DeviceListEntry for a device and adds it to the list of devices
/// </summary>
/// <param name="deviceInformation">DeviceInformation on the device to be added to the list</param>
/// <param name="deviceId">The AQS used to find this device</param>
private void AddDeviceToListAsync(String deviceId)
{
// search the device list for a device with a matching interface ID
var serialMatch = FindDevice(deviceId);
// Add the device if it's new
if (serialMatch == null)
{
var serialDevice = new SerialDeviceInformation(deviceId);
OnLogMessageAvailable(NanoDevicesEventSource.Log.CandidateDevice(deviceId));
// search the nanoFramework device list for a device with a matching interface ID
var nanoFrameworkDeviceMatch = FindNanoFrameworkDevice(deviceId);
if (nanoFrameworkDeviceMatch == null)
{
// Create a new element for this device and...
var newNanoFrameworkDevice = new NanoDevice <NanoSerialDevice>();
newNanoFrameworkDevice.DeviceId = deviceId;
newNanoFrameworkDevice.ConnectionPort = new PortSerial(this, newNanoFrameworkDevice);
newNanoFrameworkDevice.Transport = TransportType.Serial;
var connectResult = newNanoFrameworkDevice.ConnectionPort.ConnectDevice();
if (connectResult == ConnectPortResult.Unauthorized)
{
OnLogMessageAvailable(NanoDevicesEventSource.Log.UnauthorizedAccessToDevice(deviceId));
}
else if (connectResult == ConnectPortResult.Connected)
{
if (CheckValidNanoFrameworkSerialDevice(newNanoFrameworkDevice))
{
//add device to the collection
NanoFrameworkDevices.Add(newNanoFrameworkDevice);
_serialDevices.Add(serialDevice);
OnLogMessageAvailable(NanoDevicesEventSource.Log.ValidDevice($"{newNanoFrameworkDevice.Description}"));
}
else
{
// disconnect
newNanoFrameworkDevice.Disconnect();
// devices powered by the USB cable and that feature a serial converter (like an FTDI chip)
// are still booting when the USB enumeration event raises
// so need to give them enough time for the boot sequence to complete before trying to communicate with them
// Failing to connect to debugger engine on first attempt occurs frequently on dual USB devices like ESP32 WROVER KIT.
// Seems to be something related with both devices using the same USB endpoint
// Another reason is that an ESP32 takes around 3 seconds to complete the boot sequence and launch the CLR.
// Until then the device will look non responsive or invalid to the detection mechanism that we're using.
// A nice workaround for this seems to be adding an extra random wait so the comms are not simultaneous.
int delay;
lock (_delay)
{
delay = _delay.Next(200, 600);
}
Thread.Sleep(BootTime + delay);
OnLogMessageAvailable(NanoDevicesEventSource.Log.CheckingValidDevice($" {newNanoFrameworkDevice.DeviceId} *** 2nd attempt ***"));
connectResult = newNanoFrameworkDevice.ConnectionPort.ConnectDevice();
if (connectResult == ConnectPortResult.Unauthorized)
{
OnLogMessageAvailable(NanoDevicesEventSource.Log.UnauthorizedAccessToDevice(deviceId));
}
else if (connectResult == ConnectPortResult.Connected)
{
if (CheckValidNanoFrameworkSerialDevice(newNanoFrameworkDevice, true))
{
//add device to the collection
NanoFrameworkDevices.Add(newNanoFrameworkDevice);
_serialDevices.Add(serialDevice);
OnLogMessageAvailable(NanoDevicesEventSource.Log.ValidDevice($"{newNanoFrameworkDevice.Description}"));
}
else
{
OnLogMessageAvailable(NanoDevicesEventSource.Log.QuitDevice(deviceId));
}
}
else
{
OnLogMessageAvailable(NanoDevicesEventSource.Log.QuitDevice(deviceId));
}
}
}
else
{
OnLogMessageAvailable(NanoDevicesEventSource.Log.QuitDevice(deviceId));
}
// subtract devices count
lock (_newDevicesCountLock)
{
_newDevicesCount--;
}
// check if we are done processing arriving devices
if (_newDevicesCount == 0)
{
ProcessDeviceEnumerationComplete();
}
}
}
}
private async Task <bool> CheckValidNanoFrameworkSerialDeviceAsync(SerialDeviceInformation deviceInformation)
{
// get name
var name = deviceInformation.DeviceInformation.Name;
var serialNumber = GetSerialNumber(deviceInformation.DeviceInformation.Id);
OnLogMessageAvailable(NanoDevicesEventSource.Log.CheckingValidDevice(deviceInformation.DeviceInformation.Id));
var tentativeDevice = await SerialDevice.FromIdAsync(deviceInformation.DeviceInformation.Id);
try
{
// Device could have been blocked by user or the device has already been opened by another app.
if (tentativeDevice != null)
{
// adjust settings for serial port
tentativeDevice.BaudRate = 115200;
tentativeDevice.DataBits = 8;
/////////////////////////////////////////////////////////////
// need to FORCE the parity setting to _NONE_ because
// the default on the current ST Link is different causing
// the communication to fail
/////////////////////////////////////////////////////////////
tentativeDevice.Parity = SerialParity.None;
tentativeDevice.WriteTimeout = TimeSpan.FromMilliseconds(1000);
tentativeDevice.ReadTimeout = TimeSpan.FromMilliseconds(1000);
if (serialNumber != null && serialNumber.Contains("NANO_"))
{
var device = FindNanoFrameworkDevice(deviceInformation.DeviceInformation.Id);
if (device != null)
{
device.Description = serialNumber + " @ " + tentativeDevice.PortName;
// should be a valid nanoFramework device, done here
return(true);
}
else
{
OnLogMessageAvailable(NanoDevicesEventSource.Log.CriticalError($"Couldn't find nano device {EventHandlerForSerialDevice.Current.DeviceInformation.Id} with serial {serialNumber}"));
}
}
else
{
// need an extra check on this because this can be 'just' a regular COM port without any nanoFramework device behind
// fill in description for this device
var device = FindNanoFrameworkDevice(deviceInformation.DeviceInformation.Id);
// need an extra check on this because this can be 'just' a regular COM port without any nanoFramework device behind
var connectionResult = await PingDeviceLocalAsync(tentativeDevice);
if (connectionResult)
{
// should be a valid nanoFramework device
device.Description = name + " @ " + tentativeDevice.PortName;
// done here
return(true);
}
else
{
// doesn't look like a nanoFramework device
return(false);
}
}
}
else
{
// Most likely the device is opened by another app, but cannot be sure
OnLogMessageAvailable(NanoDevicesEventSource.Log.CriticalError($"Unknown error, possibly opened by another app : {deviceInformation.DeviceInformation.Id}"));
}
}
// catch all because the device open might fail for a number of reasons
catch (Exception ex)
{
}
finally
{
// dispose on a Task to perform the Dispose()
// this is required to be able to actually close devices that get stuck with pending tasks on the in/output streams
var closeTask = Task.Factory.StartNew(() =>
{
// This closes the handle to the device
tentativeDevice?.Dispose();
tentativeDevice = null;
});
}
// default to false
return(false);
}
/// <summary>
/// Creates a DeviceListEntry for a device and adds it to the list of devices
/// </summary>
/// <param name="deviceInformation">DeviceInformation on the device to be added to the list</param>
/// <param name="deviceSelector">The AQS used to find this device</param>
private async void AddDeviceToList(DeviceInformation deviceInformation, String deviceSelector)
{
// device black listed
// discard known system and unusable devices
//
if (
deviceInformation.Id.StartsWith(@"\\?\ACPI") ||
// reported in https://github.com/nanoframework/Home/issues/332
// COM ports from Broadcom 20702 Bluetooth adapter
deviceInformation.Id.Contains(@"VID_0A5C+PID_21E1") ||
// reported in https://nanoframework.slack.com/archives/C4MGGBH1P/p1531660736000055?thread_ts=1531659631.000021&cid=C4MGGBH1P
// COM ports from Broadcom 20702 Bluetooth adapter
deviceInformation.Id.Contains(@"VID&00010057_PID&0023")
)
{
OnLogMessageAvailable(NanoDevicesEventSource.Log.DroppingBlackListedDevice(deviceInformation.Id));
// don't even bother with these
return;
}
OnLogMessageAvailable(NanoDevicesEventSource.Log.DeviceArrival(deviceInformation.Id));
// search the device list for a device with a matching interface ID
var serialMatch = FindDevice(deviceInformation.Id);
// Add the device if it's new
if (serialMatch == null)
{
var serialDevice = new SerialDeviceInformation(deviceInformation, deviceSelector);
_serialDevices.Add(serialDevice);
OnLogMessageAvailable(NanoDevicesEventSource.Log.CandidateDevice(deviceInformation.Id));
// search the nanoFramework device list for a device with a matching interface ID
var nanoFrameworkDeviceMatch = FindNanoFrameworkDevice(deviceInformation.Id);
if (nanoFrameworkDeviceMatch == null)
{
// Create a new element for this device and...
var newNanoFrameworkDevice = new NanoDevice <NanoSerialDevice>();
newNanoFrameworkDevice.Device.DeviceInformation = new SerialDeviceInformation(deviceInformation, deviceSelector);
newNanoFrameworkDevice.Parent = this;
newNanoFrameworkDevice.Transport = TransportType.Serial;
// ... add it to the collection of tentative devices
_tentativeNanoFrameworkDevices.Add(newNanoFrameworkDevice as NanoDeviceBase);
// perform check for valid nanoFramework device is this is not the initial enumeration
if (IsDevicesEnumerationComplete)
{
if (await CheckValidNanoFrameworkSerialDeviceAsync(newNanoFrameworkDevice.Device.DeviceInformation))
{
// the device info was updated above, need to get it from the tentative devices collection
//add device to the collection
NanoFrameworkDevices.Add(FindNanoFrameworkDevice(newNanoFrameworkDevice.Device.DeviceInformation.DeviceInformation.Id));
OnLogMessageAvailable(NanoDevicesEventSource.Log.ValidDevice($"{newNanoFrameworkDevice.Description} {newNanoFrameworkDevice.Device.DeviceInformation.DeviceInformation.Id}"));
// done here, clear tentative list
_tentativeNanoFrameworkDevices.Clear();
// done here
return;
}
// clear tentative list
_tentativeNanoFrameworkDevices.Clear();
OnLogMessageAvailable(NanoDevicesEventSource.Log.QuitDevice(deviceInformation.Id));
_serialDevices.Remove(serialDevice);
}
}
}
}