C++ xTaskIncrementTick函数代码示例

	void TIM2_IRQHandler( void )
	{
		/* Reset the timer counter to avioid overflow. */
		TIM2->OC1R += s_nPulseLength;
		
		/* Increment the tick counter. */
		if( xTaskIncrementTick() != pdFALSE )
		{
			/* Select a new task to run. */
			vTaskSwitchContext();
		}
		
		/* Clear the interrupt in the watchdog. */
		TIM2->SR &= ~TIM_FLAG_OC1;
	}

void __attribute__ ((interrupt)) __cs3_isr_interrupt_119( void )
{
unsigned portLONG ulSavedInterruptMask;

	/* Clear the PIT0 interrupt. */
	MCF_PIT0_PCSR |= MCF_PIT_PCSR_PIF;

	/* Increment the RTOS tick. */
	ulSavedInterruptMask = portSET_INTERRUPT_MASK_FROM_ISR();
		if( xTaskIncrementTick() != pdFALSE )
		{
			taskYIELD();
		}
	portCLEAR_INTERRUPT_MASK_FROM_ISR( ulSavedInterruptMask );
}

void xPortSysTickHandler( void )
{
uint32_t ulPreviousMask;

	ulPreviousMask = portSET_INTERRUPT_MASK_FROM_ISR();
	{
		/* Increment the RTOS tick. */
		if( xTaskIncrementTick() != pdFALSE )
		{
			/* Pend a context switch. */
			*(portNVIC_INT_CTRL) = portNVIC_PENDSVSET;
		}
	}
	portCLEAR_INTERRUPT_MASK_FROM_ISR( ulPreviousMask );
}

	void vNonPreemptiveTick( void )
	{
		uint32_t ulDummy;

		/* Increment the tick count - which may wake some tasks but as the
		preemptive scheduler is not being used any woken task is not given
		processor time no matter what its priority. */
		xTaskIncrementTick();

		/* Clear the PIT interrupt. */
		ulDummy = AT91C_BASE_PITC->PITC_PIVR;

		/* End the interrupt in the AIC. */
		AT91C_BASE_AIC->AIC_EOICR = ulDummy;
	}

void xPortSysTickHandler( void )
{
unsigned long ulDummy;

	ulDummy = portSET_INTERRUPT_MASK_FROM_ISR();
	{
		/* Increment the RTOS tick. */
		if( xTaskIncrementTick() != pdFALSE )
		{
			/* Pend a context switch. */
			*(portNVIC_INT_CTRL) = portNVIC_PENDSVSET;
		}
	}
	portCLEAR_INTERRUPT_MASK_FROM_ISR( ulDummy );
}

__interrupt void vTickISR( void )
{
	/* Re-enable interrupts. */
	__enable_interrupt();

	/* Increment the tick, and perform any processing the new tick value
	necessitates. */
	__set_interrupt_level( configMAX_SYSCALL_INTERRUPT_PRIORITY );
	{
		if( xTaskIncrementTick() != pdFALSE )
		{
			taskYIELD();
		}
	}
	__set_interrupt_level( configKERNEL_INTERRUPT_PRIORITY );
}

void vTickISR( void )
{
	/* Re-enabled interrupts. */
	__asm volatile( "SETPSW	I" );
	
	/* Increment the tick, and perform any processing the new tick value
	necessitates.  Ensure IPL is at the max syscall value first. */
	portDISABLE_INTERRUPTS_FROM_KERNEL_ISR();
	{
		if( xTaskIncrementTick() != pdFALSE )
		{
			taskYIELD();
		}
	}
	portENABLE_INTERRUPTS_FROM_KERNEL_ISR();
}

void xPortSysTickHandler( void )
{
    nrf_rtc_event_clear(portNRF_RTC_REG, NRF_RTC_EVENT_TICK);
#if configUSE_TICKLESS_IDLE == 1
    nrf_rtc_event_clear(portNRF_RTC_REG, NRF_RTC_EVENT_COMPARE_0);
#endif
    uint32_t isrstate = portSET_INTERRUPT_MASK_FROM_ISR();
    /* Increment the RTOS tick. */
    if ( xTaskIncrementTick() != pdFALSE )
    {
        /* A context switch is required.  Context switching is performed in
        the PendSV interrupt.  Pend the PendSV interrupt. */
        SCB->ICSR = SCB_ICSR_PENDSVSET_Msk;
        __SEV();
    }
    portCLEAR_INTERRUPT_MASK_FROM_ISR( isrstate );
}

void xPortSysTickHandler( void )
{
    /* The SysTick runs at the lowest interrupt priority, so when this interrupt
    executes all interrupts must be unmasked.  There is therefore no need to
    save and then restore the interrupt mask value as its value is already
    known. */
    ( void ) portSET_INTERRUPT_MASK_FROM_ISR();
    {
        /* Increment the RTOS tick. */
        if( xTaskIncrementTick() != pdFALSE ) {
            /* A context switch is required.  Context switching is performed in
            the PendSV interrupt.  Pend the PendSV interrupt. */
            portNVIC_INT_CTRL_REG = portNVIC_PENDSVSET_BIT;
        }
    }
    portCLEAR_INTERRUPT_MASK_FROM_ISR( 0 );
}

void vPortIncrementTick( void )
{
    unsigned portBASE_TYPE uxSavedStatus;

    uxSavedStatus = uxPortSetInterruptMaskFromISR();
    {
        if( xTaskIncrementTick() != pdFALSE )
        {
            /* Pend a context switch. */
            _CP0_BIS_CAUSE( portCORE_SW_0 );
        }
    }
    vPortClearInterruptMaskFromISR( uxSavedStatus );

    /* Clear timer 1 interrupt. */
    IFS0CLR = _IFS0_T1IF_MASK;
}

	void vPreemptiveTick( void )
	{
		/* Save the context of the current task. */
		portSAVE_CONTEXT();

		/* Increment the tick count - this may wake a task. */
		if( xTaskIncrementTick() != pdFALSE )
		{
			/* Find the highest priority task that is ready to run. */
			vTaskSwitchContext();
		}

		/* End the interrupt in the AIC. */
		AT91C_BASE_AIC->AIC_EOICR = AT91C_BASE_PITC->PITC_PIVR;

		portRESTORE_CONTEXT();
	}

void interrupt VectorNumber_Vrtc vPortTickISR( void )
{
uint32_t ulSavedInterruptMask;

	/* Clear the interrupt. */
	RTCSC |= RTCSC_RTIF_MASK;

	/* Increment the RTOS tick. */
	ulSavedInterruptMask = portSET_INTERRUPT_MASK_FROM_ISR();
	{
		if( xTaskIncrementTick() != pdFALSE )
		{
			taskYIELD();
		}
	}
	portCLEAR_INTERRUPT_MASK_FROM_ISR( ulSavedInterruptMask );
}

void vPortYieldFromTick( void )
{
	portSAVE_CONTEXT();

	if (--ticksRemainingInSec == 0)
	{
		system_tick();
		ticksRemainingInSec = portTickRateHz;
	}

	if( xTaskIncrementTick() != pdFALSE )
	{
		vTaskSwitchContext();
	}

	portRESTORE_CONTEXT();

	asm volatile ( "ret" );
}

void vPortTickHandler(void) {
  /* this is how we get here:
    RTOSTICKLDD1_Interrupt:
    push {r4, lr}
    ...                                       RTOSTICKLDD1_OnCounterRestart
    bl RTOSTICKLDD1_OnCounterRestart     ->   push {r4,lr}
    pop {r4, lr}                              mov r4,r0
                                              bl vPortTickHandler
                                              pop {r4,pc}
  */
#if configUSE_TICKLESS_IDLE == 1
  TICK_INTERRUPT_FLAG_SET();
#endif
  portSET_INTERRUPT_MASK();   /* disable interrupts */
  if (xTaskIncrementTick()!=pdFALSE) { /* increment tick count */
    taskYIELD();
  }
  portCLEAR_INTERRUPT_MASK(); /* enable interrupts again */
}

void xPortSysTickHandler( void )
{
	/* The SysTick runs at the lowest interrupt priority, so when this interrupt
	executes all interrupts must be unmasked.  There is therefore no need to
	save and then restore the interrupt mask value as its value is already
	known - therefore the slightly faster vPortRaiseBASEPRI() function is used
	in place of portSET_INTERRUPT_MASK_FROM_ISR(). */
	vPortRaiseBASEPRI();
	{
		/* Increment the RTOS tick. */
		if( xTaskIncrementTick() != pdFALSE )
		{
			/* A context switch is required.  Context switching is performed in
			the PendSV interrupt.  Pend the PendSV interrupt. */
			portNVIC_INT_CTRL_REG = portNVIC_PENDSVSET_BIT;
		}
	}
	vPortClearBASEPRIFromISR();
}