示例#1
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/**
 * @brief	RITimer IRQ handler and timebase management
 * @return	Nothing
 * @note	This function keeps a timebase for LWIP that can be
 * used for other functions.
 */
void OSEK_ISR_RIT_IRQHandler(void)
{
	/* Clear RITimer Interrupt, Reload counter value */
	Chip_RIT_ClearInt(LPC_RITIMER);
	Chip_RIT_SetCOMPVAL(LPC_RITIMER, Chip_RIT_GetCounter(LPC_RITIMER) + reload_val);/* Reload value */

	/* Increment tick count */
	systick_timems += saved_period;
}
示例#2
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/**
 * @brief	Initialize tick interrupts
 * @return	Nothing
 * @note	This function initializes the tick interrupts, and must
 * be called before starting the freeRTOS scheduler.
 */
void prvSetupTimerInterrupt(void)
{
	/* Clear any pending interrupt */
	Chip_RIT_ClearInt(LPC_RITIMER);

	/* Calculate reload value */
	reload_val = (configCPU_CLOCK_HZ / configTICK_RATE_HZ);
	Chip_RIT_SetCOMPVAL(LPC_RITIMER, Chip_RIT_GetCounter(LPC_RITIMER) + reload_val);/* Start tick */

	/* Set the priority and enable the interrupt */
	NVIC_SetPriority((IRQn_Type) RITIMER_IRQn, portNVIC_SYSTICK_PRI);
	NVIC_EnableIRQ((IRQn_Type) RITIMER_IRQn);
}
示例#3
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/* Set timer interval value */
void Chip_RIT_SetTimerInterval_(LPC_RITIMER_T *pRITimer, uint32_t time_interval)
{
	uint32_t cmp_value;

	/* Determine aapproximate compare value based on clock rate and passed interval */
	cmp_value = ((Chip_Clock_GetRate(CLK_MX_RITIMER) / 1000) * time_interval )/ 1000;

	/* Set timer compare value */
	Chip_RIT_SetCOMPVAL(pRITimer, cmp_value);

	/* Set timer enable clear bit to clear timer to 0 whenever
	   counter value equals the contents of RICOMPVAL */
	Chip_RIT_EnableCTRL(pRITimer, RIT_CTRL_ENCLR);
}
示例#4
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/* Enable LWIP tick and interrupt */
void lwipSysTick_Enable(uint32_t period)
{
	saved_period = period;

	/* Clear any pending interrupt */
	Chip_RIT_ClearInt(LPC_RITIMER);

	/* Calculate reload value */
	reload_val = ( SystemCoreClock / ( 1000 / period ) );
	Chip_RIT_SetCOMPVAL(LPC_RITIMER, Chip_RIT_GetCounter(LPC_RITIMER) + reload_val);/* Let it tick */

	/* Set the priority and enable the interrupt */
	NVIC_SetPriority((IRQn_Type) RITIMER_IRQn, RITIMER_IRQn_PRI);
	NVIC_EnableIRQ((IRQn_Type) RITIMER_IRQn);
}
示例#5
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/**
 * @brief	RITimer IRQ handler and timebase management
 * @return	Nothing
 * @note	This function keeps a timebase for LWIP that can be
 * used for other functions.
 */
void RIT_IRQHandler(void)
{
#define CONTEXT_ISR2 3
   typedef uint8_t ContextType;
   extern ContextType ActualContext;

   ContextType ctx = ActualContext;
   ActualContext = CONTEXT_ISR2;

	/* Clear RITimer Interrupt, Reload counter value */
	Chip_RIT_ClearInt(LPC_RITIMER);
	Chip_RIT_SetCOMPVAL(LPC_RITIMER, Chip_RIT_GetCounter(LPC_RITIMER) + reload_val);/* Reload value */

	/* Increment tick count */
	systick_timems += saved_period;

   ActualContext = ctx;
}
示例#6
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/**
 * @brief	Tick interrupt handler routine
 * @return	Nothing
 * @note	This function handles the tick interrupts that are generated by RITIMER.
 */
void xPortSysTickHandler(void)
{
	unsigned long ulDummy;

	/* TODO: check if WWDT interrupt and redirect */
	Chip_RIT_ClearInt(LPC_RITIMER);
	Chip_RIT_SetCOMPVAL(LPC_RITIMER, Chip_RIT_GetCounter(LPC_RITIMER) + reload_val);/* Reload value */

#if configUSE_PREEMPTION == 1
	/* If using preemption, also force a context switch. */
	*(portNVIC_INT_CTRL) = portNVIC_PENDSVSET;
#endif

	ulDummy = portSET_INTERRUPT_MASK_FROM_ISR();
	{
		vTaskIncrementTick();
	}
	portCLEAR_INTERRUPT_MASK_FROM_ISR(ulDummy);
}
示例#7
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/** \brief Set timer interval value in microseconds */
void Chip_RIT_SetTimerIntervaluS(LPC_RITIMER_T *pRITimer, uint32_t time_interval_us)
{
	/** \details
	 * This method is a copy of Chip_RIT_SetTimerInterval provided by vendor, in which
	 * I made a minimal change to obtain a function that uses as parameter a number
	 * in microseconds to interrupt with the RIT timer
	 *
	 * \param LPC_RITIMER_T *pRITimer: pointer to the RIT timer.
	 * \param uint32_t time_interval_us: time interval in microseconds.
	 *
	 * \return nothing
	 * */
	uint32_t cmp_value;

	/* Determine approximate compare value based on clock rate and passed interval */
	cmp_value = (Chip_Clock_GetRate(CLK_MX_RITIMER)/1000000) * time_interval_us;

	/* Set timer compare value */
	Chip_RIT_SetCOMPVAL(pRITimer, cmp_value);

	/* Set timer enable clear bit to clear timer to 0 whenever
	   counter value equals the contents of RICOMPVAL */
	Chip_RIT_EnableCTRL(pRITimer, RIT_CTRL_ENCLR);
}
示例#8
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/**
 * @brief	Tick interrupt handler routine
 * @return	Nothing
 * @note	This function handles the tick interrupts that are generated by RITIMER.
 */
void RIT_IRQHandler(void)
{
	unsigned long ulPreviousMask;

	/* TODO: check if WWDT interrupt and redirect */
	Chip_RIT_ClearInt(LPC_RITIMER);
	Chip_RIT_SetCOMPVAL(LPC_RITIMER, Chip_RIT_GetCounter(LPC_RITIMER) + reload_val);/* Reload value */

#if configUSE_PREEMPTION == 1
	/* If using preemption, also force a context switch. */
	*(portNVIC_INT_CTRL) = portNVIC_PENDSVSET;
#endif

	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 );
}