static void prvSetupTimerInterrupt( void )
{
EIC_IRQInitTypeDef  EIC_IRQInitStructure;	
TB_InitTypeDef      TB_InitStructure;

	/* Setup the EIC for the TB. */
	EIC_IRQInitStructure.EIC_IRQChannelCmd = ENABLE;
	EIC_IRQInitStructure.EIC_IRQChannel = TB_IRQChannel;
	EIC_IRQInitStructure.EIC_IRQChannelPriority = 1;
	EIC_IRQInit(&EIC_IRQInitStructure);
	
	/* Setup the TB for the generation of the tick interrupt. */
	TB_InitStructure.TB_Mode = TB_Mode_Timing;
	TB_InitStructure.TB_CounterMode = TB_CounterMode_Down;
	TB_InitStructure.TB_Prescaler = portPRESCALE - 1;
	TB_InitStructure.TB_AutoReload = ( ( configCPU_CLOCK_HZ / portPRESCALE ) / configTICK_RATE_HZ );
	TB_Init(&TB_InitStructure);
	
	/* Enable TB Update interrupt */
	TB_ITConfig(TB_IT_Update, ENABLE);

	/* Clear TB Update interrupt pending bit */
	TB_ClearITPendingBit(TB_IT_Update);

	/* Enable TB */
	TB_Cmd(ENABLE);
}
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__arm void vPortPreemptiveTick( void )
{
	/* Increment the tick counter. */
	if( xTaskIncrementTick() != pdFALSE )
	{
		/* Select a new task to execute. */
		vTaskSwitchContext();
	}
		
	TB_ClearITPendingBit( TB_IT_Update );
}
Esempio n. 3
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__arm void vPortPreemptiveTick( void )
{
	/* Increment the tick counter. */
	vTaskIncrementTick();

	/* The new tick value might unblock a task.  Ensure the highest task that
	is ready to execute is the task that will execute when the tick ISR
	exits. */
	#if configUSE_PREEMPTION == 1
		vTaskSwitchContext();
	#endif

	TB_ClearITPendingBit( TB_IT_Update );
}