//------------------------------------------------------------------------------
/// Interrupt service routine for the PIT. Debounces the wake-up pin input.
//------------------------------------------------------------------------------
static void ISR_Pit(void)
{
static unsigned long debounceCounter = DEBOUNCE_TIME;
unsigned long pisr = 0;
// Read the PISR
pisr = PIT_GetStatus() & AT91C_PITC_PITS;
if (pisr != 0) {
// Read the PIVR. It acknowledges the IT
PIT_GetPIVR();
}
// Button released
if (PIO_Get(&pinWakeUp)) {
debounceCounter = DEBOUNCE_TIME;
}
// Button still pressed
else {
debounceCounter--;
}
// End of debounce time
if (debounceCounter == 0) {
debounceCounter = DEBOUNCE_TIME;
PIT_DisableIT();
AT91C_BASE_PITC->PITC_PIMR &= ~AT91C_PITC_PITEN;
COMPOSITEDDriver_RemoteWakeUp();
}
}
//------------------------------------------------------------------------------
/// Handler for PIT interrupt. Increments the timestamp counter.
//------------------------------------------------------------------------------
void ISR_Pit(void)
{
unsigned int status;
// Read the PIT status register
status = PIT_GetStatus() & AT91C_PITC_PITS;
if (status != 0) {
// Read the PIVR to acknowledge interrupt and get number of ticks
timestamp += (PIT_GetPIVR() >> 20);
#ifdef QF_TICK
#ifdef QK
__disable_irq();
++QK_intNest_;
#endif
QF_INT_UNLOCK();
QF_tick();
QF_INT_LOCK();
#ifdef QK
--QK_intNest_;
if ( QK_intNest_ ==0)
QK_schedule_();
#endif
#endif
}
//------------------------------------------------------------------------------
/// Handler for PIT interrupt. Increments the timestamp counter.
//------------------------------------------------------------------------------
void ISR_Pit(void)
{
unsigned int status;
// Read the PIT status register
status = PIT_GetStatus() & AT91C_PITC_PITS;
if (status != 0) {
// Read the PIVR to acknowledge interrupt and get number of ticks
timestamp += (PIT_GetPIVR() >> 20);
}
/* _____LOCAL FUNCTIONS______________________________________________________ */
static void pit_interrupt(void)
{
u32_t u32Pivr = 0;
u32_t u32Pisr = 0;
// Read the PISR
u32Pisr = PIT_GetStatus() & AT91C_PITC_PITS;
if (u32Pisr != 0)
{
// Read the PIVR. It acknowledges the interrupt
u32Pivr = PIT_GetPIVR();
// Add to counter the number of occurrences of periodic intervals
// since the last read of PITD_PIVR
pit_tick_counter += (u32Pivr >> 20);
}
