Bug in GPIO Port constructor

[Martin D.]

We think we found a bug in
Library_spot_hardware_native_Microsoft_SPOT_Hardware_Port when trying to
construct a new OutputPort on a already reserved pin.

The testcode throws the following exception when entering thread.sleep()
after a forced garbage collector:

#### Exception System.Exception - CLR_E_WRONG_TYPE (3) ####
#### Microsoft.SPOT.Hardware.Port::Dispose [IP: 0000] ####
#### Microsoft.SPOT.Hardware.NativeEventDispatcher::Finalize [IP: 0005]
####
An unhandled exception of type 'System.Exception' occurred in
Microsoft.SPOT.Hardware.dll

public void DeviceGarbageCollectorTest()
{
try
{
//calling slave method
DeviceGarbageCollectorTest_Slave();

//the object testPort will now dispose
Debug.GC(true);

//now CLR_E_WRONG_TYPE will be thrown
Thread.Sleep(1000);
}
catch
{
Debug.Print("exception was thrown!");
}
}

private void DeviceGarbageCollectorTest_Slave()
{
//Reserve a Pin
Port.ReservePin(Cpu.Pin.GPIO_Pin14, true);
try
{
//try to create a OutputPort Object using the same pin
//OutputPort testPort = new OutputPort(Cpu.Pin.GPIO_Pin14,
true);
}
catch
{
//CLR_E_PIN_UNAVAILABLE will be thrown, everything seems to
be alright
}
}

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[Lorenzo Tessiore]

Thank you for reportign this issue, we will investigate it
Lorenzo