void Library_spot_hardware_native_Microsoft_SPOT_Hardware_Port::IsrProcedure( GPIO_PIN pin, BOOL pinState, void* context )
{
{
ASSERT_IRQ_MUST_BE_OFF();
// If context parameter is NULL, then there is no way to dispatch data managed thread.
CLR_RT_HeapBlock_NativeEventDispatcher* port = (CLR_RT_HeapBlock_NativeEventDispatcher*)context;
if ( port == NULL )
{
return;
}
// Retrieve managed object correspoinding to instance of CLR_RT_HeapBlock.
// Managed object keeps all the data associated with port.
CLR_RT_HeapBlock* pManagedPortObj = NULL;
port->RecoverManagedObject( pManagedPortObj );
if ( pManagedPortObj == NULL )
{
return;
}
CLR_INT32 &flags = pManagedPortObj[ Library_spot_hardware_native_Microsoft_SPOT_Hardware_Port::FIELD__m_flags ].NumericByRef().s4;
CLR_UINT32 portID = pManagedPortObj[ Library_spot_hardware_native_Microsoft_SPOT_Hardware_Port::FIELD__m_portId ].NumericByRefConst().u4;
GPIO_INT_EDGE interruptMode = (GPIO_INT_EDGE)pManagedPortObj[ Library_spot_hardware_native_Microsoft_SPOT_Hardware_Port::FIELD__m_interruptMode ].NumericByRefConst().s4;
GPIO_RESISTOR resistorMode = (GPIO_RESISTOR)pManagedPortObj[ Library_spot_hardware_native_Microsoft_SPOT_Hardware_Port::FIELD__m_resistorMode ].NumericByRefConst().s4;
// Discard the call if flags show that interrupt is disabled for this port.
if ( flags & GPIO_PortParams::c_InterruptDisabled )
{
return;
}
// For the level interrupt we disable it once the level was reached.
// Application needs to enable it back. It is used to protect agains multiple callbacks as result of reaching the level.
if ( interruptMode == GPIO_INT_LEVEL_HIGH || interruptMode == GPIO_INT_LEVEL_LOW )
{
if ( flags & GPIO_PortParams::c_Disposed )
{
return;
}
// Disable interrupts for port if not disabled.
if(( flags & GPIO_PortParams::c_InterruptDisabled ) == 0)
{
// Disable level interrupt.
flags |= GPIO_PortParams::c_InterruptDisabled;
::CPU_GPIO_EnableInputPin2(
portID, // data1 is portId for GPIO case.
false,
NULL,
0,
GPIO_INT_NONE,
resistorMode
);
}
}
// To calling SaveToHALQueue saves data to 128 slot HAL queue and finally causes dispatch to managed callback.
port->SaveToHALQueue( pin, pinState );
}
}
