/*---------------------------------------------------------------------------*
* Routine: InterruptDisable
*---------------------------------------------------------------------------*
* Description:
* Disable an existing interrupt.
* Inputs:
* T_irqChannel aChannel -- Handle of registered interrupt to
* disable.
*---------------------------------------------------------------------------*/
void InterruptDisable(T_irqChannel aChannel)
{
if (aChannel >= UEZ_MAX_IRQ_CHANNELS)
InterruptFatalError();
NVIC_DisableIRQ((IRQn_Type)aChannel);
}
/*---------------------------------------------------------------------------*
* Routine: InterruptUnregister
*---------------------------------------------------------------------------*
* Description:
* The interrupt is no longer needed. Disable and remove it.
* Inputs:
* TUInt32 aInterruptChannel -- Channel of interrupt to unregister
*---------------------------------------------------------------------------*/
void InterruptUnregister(TUInt32 aInterruptChannel)
{
T_irqHandleStruct *p;
if (aInterruptChannel >= UEZ_MAX_IRQ_CHANNELS)
InterruptFatalError();
// Look up the channel
p = G_isrArray+aInterruptChannel;
// Is there an interrupt here?
if (p->iISR == 0)
InterruptFatalError();
NVIC_DisableIRQ((IRQn_Type)aInterruptChannel);
// Mark it as freed
p->iISR = 0;
}
/*---------------------------------------------------------------------------*
* Routine: InterruptUnregister
*---------------------------------------------------------------------------*
* Description:
* The interrupt is no longer needed. Disable and remove it.
* Inputs:
* TUInt32 aInterruptChannel -- Channel of interrupt to unregister
*---------------------------------------------------------------------------*/
void InterruptUnregister(TUInt32 aInterruptChannel)
{
T_irqHandleStruct *p;
if (aInterruptChannel >= UEZ_MAX_IRQ_CHANNELS)
InterruptFatalError();
// Ensure interrupt is turned off
InterruptDisable(aInterruptChannel);
// Look up the channel
p = G_isrArray+aInterruptChannel;
// Is there an interrupt here?
if (p->iISR == InterruptFatalError)
InterruptFatalError();
// Mark it as freed
p->iISR = InterruptFatalError;
}
/*---------------------------------------------------------------------------*
* Routine: InterruptRegister
*---------------------------------------------------------------------------*
* Description:
* Register an interrupt.
* Inputs:
* TUInt32 aInterruptChannel -- Channel of interrupt to register
* TFPtr aISR -- Pointer to interrupt service routine.
* T_irqPriority aPriority -- Priority of interrupt.
* const char *aName -- Name/descriptor of interrupt.
*---------------------------------------------------------------------------*/
void InterruptRegister(
TUInt32 aInterruptChannel,
TISRFPtr aISR,
T_irqPriority aPriority,
const char * const aName)
{
T_irqHandleStruct *p;
// Reject attempts to allocate more ISRs than available
if (aInterruptChannel >= UEZ_MAX_IRQ_CHANNELS)
InterruptFatalError();
// Create a new entry and return the handle
p = G_isrArray+aInterruptChannel;
// Interrupt already exists for this one!
if (p->iISR != 0)
InterruptFatalError();
p->iInterruptChannel = aInterruptChannel;
p->iISR = aISR;
#if LPC17xx_40xx_INTERRUPT_TRACK_NAMES
p->iName = aName;
#endif
// Set the interrupt priority.
#if (RTOS == SafeRTOS)
/* <<< WHIS >>> Assignment of interrupt levels is critical to the correct
operation of UEZ and SafeRTOS. Interrupt.h defines levels between 0-15,
whereas the LPC17xx_40xx has 32 interrupt levels. However all UEZ interrupts
use the semaphore release and therefore need to be greater than
configSYSTEM_INTERRUPT_PRIORITY_LVL. configSYSTEM_INTERRUPT_PRIORITY_LVL is
defined as 16 so we can just add the uEZ priority to the RTOS threshold
to arrive a legal priority between 16 and 31. */
NVIC_SetPriority((IRQn_Type)aInterruptChannel, configSYSTEM_INTERRUPT_PRIORITY_LVL + aPriority);
#else
NVIC_SetPriority((IRQn_Type)aInterruptChannel, 6+aPriority);
#endif
//NVIC_EnableIRQ((IRQn_Type)aInterruptChannel);
}
/*---------------------------------------------------------------------------*
* Routine: InterruptRegister
*---------------------------------------------------------------------------*
* Description:
* Register an interrupt.
* Inputs:
* TUInt32 aInterruptChannel -- Channel of interrupt to register
* TFPtr aISR -- Pointer to interrupt service routine.
* T_irqPriority aPriority -- Priority of interrupt.
* const char *aName -- Name/descriptor of interrupt.
*---------------------------------------------------------------------------*/
void InterruptRegister(
TUInt32 aInterruptChannel,
TFPtr aISR,
T_irqPriority aPriority,
const char * const aName)
{
T_irqHandleStruct *p;
// Reject attempts to allocate more ISRs than available
if (aInterruptChannel >= UEZ_MAX_IRQ_CHANNELS)
InterruptFatalError();
// Create a new entry and return the handle
p = G_isrArray+aInterruptChannel;
// Interrupt already exists for this one!
if (p->iISR != InterruptFatalError)
InterruptFatalError();
p->iISR = aISR;
p->iName = aName;
// Set the priority
ICU.IPR[G_IPRTable[aInterruptChannel]].BIT.IPR = 15-aPriority;
}
