C++ NVIC_EncodePriority函数代码示例

int main(void)
{
    DelayInit();
    GPIO_QuickInit(HW_GPIOE, 6, kGPIO_Mode_OPP);
    UART_QuickInit(UART0_RX_PD06_TX_PD07, 115200);
    
    /* 设置PORTE PORTA 中断 */
    GPIO_QuickInit(HW_GPIOE,26, kGPIO_Mode_IPU);
    GPIO_QuickInit(HW_GPIOA, 4, kGPIO_Mode_IPU);
    GPIO_CallbackInstall(HW_GPIOE, PORTE_ISR);
    GPIO_CallbackInstall(HW_GPIOA, PORTA_ISR);
    GPIO_ITDMAConfig(HW_GPIOE, 26, kGPIO_IT_RisingEdge, true);
    GPIO_ITDMAConfig(HW_GPIOA, 4,  kGPIO_IT_RisingEdge, true);
    
    printf("NVIC test connect E26&A04\r\n");
    /* 将系统 中断优先级分组 可以配置 16个 抢占优先级 和16个 子优先级 */
    NVIC_SetPriorityGrouping(NVIC_PriorityGroup_2);  //中断优先级分成2组
    NVIC_SetPriority(PORTE_IRQn, NVIC_EncodePriority(NVIC_PriorityGroup_2, 2, 2)); //设置PTE端口的抢占优先级的子优先级
    NVIC_SetPriority(PORTA_IRQn, NVIC_EncodePriority(NVIC_PriorityGroup_2, 2, 2));
    
    while(1)
    {
        GPIO_ToggleBit(HW_GPIOE, 6);
        DelayMs(500);
    }
}

void init_Priority(void){

	uint32_t priority, PG = 5, PP, SP; // priority grouping, pre-empt priority, subpriority
	NVIC_SetPriorityGrouping(5);

	PP = 0, SP = 0;
	priority = NVIC_EncodePriority(PG,PP,SP);
	NVIC_SetPriority(SysTick_IRQn, priority);
	PP = 1, SP = 0;
	priority = NVIC_EncodePriority(PG,PP,SP);
	NVIC_SetPriority(EINT3_IRQn, priority); // light sensor and SW3
	// interrupt with smallest time interval is given higher priority
	PP = 2, SP = 0;
	priority = NVIC_EncodePriority(PG,PP,SP);
	NVIC_SetPriority(TIMER1_IRQn, priority); // pca9532 led (250ms)
	PP = 2, SP = 1;
	priority = NVIC_EncodePriority(PG,PP,SP);
	NVIC_SetPriority(TIMER2_IRQn, priority); // rgb (1s)
	PP = 2, SP = 2;
	priority = NVIC_EncodePriority(PG,PP,SP);
	NVIC_SetPriority(TIMER3_IRQn, priority); // sampling (2s)
	// clear pending status before enabling
	NVIC_ClearPendingIRQ(EINT3_IRQn);
	NVIC_ClearPendingIRQ(TIMER1_IRQn);
	NVIC_ClearPendingIRQ(TIMER2_IRQn);
	NVIC_ClearPendingIRQ(TIMER3_IRQn);

	NVIC_EnableIRQ(EINT3_IRQn);
	NVIC_EnableIRQ(TIMER1_IRQn);
	NVIC_EnableIRQ(TIMER2_IRQn);
	NVIC_EnableIRQ(TIMER3_IRQn);
}

void Timerx_Init(GPTM_TypeDef* GPTMx,u16 arr,u16 psc)
{
   GPTM_TimeBaseInitTypeDef  GPTM_TimeBaseStructure;
	//NVIC_InitTypeDef NVIC_InitStructure;
	Assert_Param(IS_GPTM(GPTMx));
		if(GPTMx==GPTM0)
	{
		CKCU_APBPerip1ClockConfig(CKCU_APBEN1_GPTM0,ENABLE);
	}
	else if(GPTMx==GPTM1)
	{
		CKCU_APBPerip1ClockConfig(CKCU_APBEN1_GPTM1,ENABLE);
	}
	
	GPTM_DeInit(GPTMx);

	GPTM_TimeBaseStructure.CounterReload = arr; //设置在下一个更新事件装入活动的自动重装载寄存器周期的值	 计数到5000为500ms
	GPTM_TimeBaseStructure.Prescaler =(7200-1); //设置用来作为TIMx时钟频率除数的预分频值  10Khz的计数频率  
	GPTM_TimeBaseStructure.PSCReloadTime = GPTM_PSC_RLD_UPDATE;//无事件发生，等待下一次重载//TIM 中断源
	GPTM_TimeBaseStructure.CounterMode = GPTM_CNT_MODE_UP;  //TIM向上计数模式
	GPTM_TimeBaseInit(GPTMx, &GPTM_TimeBaseStructure); //根据TIM_TimeBaseInitStruct中指定的参数初始化TIMx的时间基数单位
 
	/* TIM IT enable */
	GPTM_IntConfig(  //使能或者失能指定的TIM中断
		GPTMx, //TIMx
		TIM_IT_Update  |  //TIM 中断源
		TIM_IT_Trigger,   //TIM 触发中断源 
		ENABLE  //使能
		);
		/* Enable the TIMx global Interrupt */

	if(GPTMx==GPTM0)
	{
		NVIC_SetPriority(GPTM0_IRQn,NVIC_EncodePriority(5,0,3));
		NVIC_EnableIRQ(GPTM0_IRQn);
		GPTM_IntConfig(GPTM0,GPTM_INT_UEV,ENABLE);
	}
	else
	if(GPTMx==GPTM1)
	{
		NVIC_SetPriority(GPTM1_IRQn,NVIC_EncodePriority(5,0,3));
		NVIC_EnableIRQ(GPTM1_IRQn);
		GPTM_IntConfig(GPTM1,GPTM_INT_UEV,ENABLE);
	}		
		/*
	NVIC_InitStructure.NVIC_IRQChannel = TIM3_IRQn;  //TIM3中断
	NVIC_InitStructure.NVIC_IRQChannelPreemptionPriority = 0;  //先占优先级0级
	NVIC_InitStructure.NVIC_IRQChannelSubPriority = 3;  //从优先级3级
	NVIC_InitStructure.NVIC_IRQChannelCmd = ENABLE; //IRQ通道被使能
	NVIC_Init(&NVIC_InitStructure);  //根据NVIC_InitStruct中指定的参数初始化外设NVIC寄存器
*/
	GPTM_Cmd(GPTMx, ENABLE);  //使能TIMx外设
							 
}

/*******************************************************************************
 * @function_name: Config_SystemClock_Priority
 * @function_file: BT.c
 * @描述：配置各中断优先级
 * @入口参数：
 * @出口参数:  无
 * @Attention:   
 *---------------------------------------------------------
 * @修改人：
 ******************************************************************************/
void Config_SystemClock_Priority(void)
{
	//开启系统定时器,重装载值(时间)为1ms
	//SysTick_Config(SystemCoreClock/1000);   
	//设置优先级组：抢占式优级（0～3），子优先级（0～3）
	NVIC_SetPriorityGrouping(5);
	//设置FRTIM_IRQn抢占优先级为1 
	NVIC_SetPriority(FRTIM_IRQn,NVIC_EncodePriority(5,0,0));
	//设置系统定时器中断抢占优先级为2
	NVIC_SetPriority(SysTick_IRQn,NVIC_EncodePriority(5,1,0));
	//设置基本定时器7中断抢占优先级为3
	NVIC_SetPriority(BTIM0_7_IRQn,NVIC_EncodePriority(5,0,0));
}

/**
  * @brief  .
  * @param  None
  * @retval None
  */
void _BSP_NvicInit (void)
{	
#ifdef VECT_TAB_RAM 
	SCB->VTOR = 0X1FFF0000;
#else /* VECT_TAB_FLASH */
	SCB->VTOR = 0x4000;
#endif
	NVIC_SetPriorityGrouping (5);//抢占式优先级(0~3),亚优先级(0~3)
	//NVIC_SetPriority(PORTA_IRQn,NVIC_EncodePriority(5,1,0));
	NVIC_SetPriority(PIT0_IRQn,NVIC_EncodePriority(5,1,1));
	NVIC_SetPriority(UART3_RX_TX_IRQn,NVIC_EncodePriority(5,1,2));
	NVIC_SetPriority(SysTick_IRQn,NVIC_EncodePriority(5,1,3));
}

/*
 *  Initialization function which initializes the App internal data
 *  structures to default values. 
 */
void  SYSTM002_Init( void)
{
  volatile uint32_t Timer_Status = SYSTM002_TIMER_CONFIGURATION_SUCCESS;
  /* <<<DD_SYSTM002 _API_1>>> */
  /** Initialize the header of the list */
  TimerList = NULL;
  /**   Initialize timer tracker  */
  Timer_Status = SysTick_Config((uint32_t)(SYSTM002_SysTickMicroSec( \
                                                  SYSTM002_SYSTICK_INTERVAL))); 
                                                
  if(SYSTM002_TIMER_CONFIGURATION_FAILURE == Timer_Status)
  {
    DBG002_INFO(APP_GID, DBG002_MESSAGEID_LITERAL, \
         sizeof("SYSTM002_Init: Timer reload value out of range"), \
                     "SYSTM002_Init: Timer reload value out of range");
  }
  else
  {
 /**  setting of Priority and subpriority value for XMC4000 devices */
#if ((__TARGET_DEVICE__ == XMC44) || (__TARGET_DEVICE__ == XMC42) || \
                (__TARGET_DEVICE__ == XMC41) || (__TARGET_DEVICE__ == XMC45))
    NVIC_SetPriority(SysTick_IRQn, NVIC_EncodePriority( \
    NVIC_GetPriorityGrouping(),SYSTM002_PRIORITY,SYSTM002_SUBPRIORITY)); 

    /**  setting of Priority value for XMC1000 devices */
#elif ((__TARGET_DEVICE__ == XMC11) || (__TARGET_DEVICE__ == XMC12) \
                                         || (__TARGET_DEVICE__ == XMC13)) 
  NVIC_SetPriority(SysTick_IRQn, SYSTM002_PRIORITY);
#endif      
    TimerTracker = 0UL;
  }
  
}

/*
 * API to initialize the PIN_INTERRUPT APP ERU Event Trigger Logic, Output Gating Unit Hardware initialization
 * and NVIC node configuration.
 */
PIN_INTERRUPT_STATUS_t PIN_INTERRUPT_Init(const PIN_INTERRUPT_t *const handle)
{
  XMC_ASSERT("PIN_INTERRUPT_Init: PIN_INTERRUPT APP handle function pointer uninitialized", (handle != NULL));

  /* Initializes input pin characteristics */
  XMC_GPIO_Init(handle->port, handle->pin, &handle->gpio_config);
  /* ERU Event Trigger Logic Hardware initialization based on UI */
  XMC_ERU_ETL_Init(handle->eru, handle->etl, &handle->etl_config);
  /* OGU is configured to generate event on configured trigger edge */
  XMC_ERU_OGU_SetServiceRequestMode(handle->eru, handle->ogu, XMC_ERU_OGU_SERVICE_REQUEST_ON_TRIGGER);
#if (UC_FAMILY == XMC1)
  /* Configure NVIC node and priority */
  NVIC_SetPriority((IRQn_Type)handle->IRQn, handle->irq_priority);
#else
  /* Configure NVIC node, priority and subpriority */
  NVIC_SetPriority((IRQn_Type)handle->IRQn, NVIC_EncodePriority(NVIC_GetPriorityGrouping(),
                    handle->irq_priority, handle->irq_subpriority));
#endif
#if (UC_SERIES == XMC14)
  XMC_SCU_SetInterruptControl((IRQn_Type)handle->IRQn, (XMC_SCU_IRQCTRL_t)handle->irqctrl);
#endif
  if (true == handle->enable_at_init)
  {
    /* Clear pending interrupt before enabling it */
    NVIC_ClearPendingIRQ((IRQn_Type)handle->IRQn);
    /* Enable NVIC node */
    NVIC_EnableIRQ((IRQn_Type)handle->IRQn);
  }
  return (PIN_INTERRUPT_STATUS_SUCCESS);
}

error_t extIntInit(void)
{
   volatile uint32_t status;

   //Enable PIO peripheral clock
   PMC->PMC_PCER0 = (1 << ID_PIOD);

   //Enable pull-up resistor on PHY IRQ pin
   PIOD->PIO_PUER = PIO_PD28;
   //Configure the corresponding pin as an input
   PIOD->PIO_ODR = PIO_PD28;
   PIOD->PIO_PER = PIO_PD28;
   //Enable interrupts-on-change
   PIOD->PIO_IDR = 0xFFFFFFFF;
   PIOD->PIO_IER = PIO_PD28;

   //Reset PHY transceiver by asserting NRST pin
   //RSTC->RSTC_MR = RSTC_MR_KEY(0xA5) | RSTC_MR_ERSTL(4);
   //RSTC->RSTC_CR = RSTC_CR_KEY(0xA5) | RSTC_CR_EXTRST;
   //Wait for the reset to complete
   //while(!(RSTC->RSTC_SR & RSTC_SR_NRSTL));

   //Delay before accessing PHY transceiver
   sleep(10);

   //Read PIO ISR register to clear any pending interrupt
   status = PIOD->PIO_ISR;

   //Configure PIOD interrupt priority
   NVIC_SetPriority(PIOD_IRQn, NVIC_EncodePriority(3, 15, 0));

   //Successful processing
   return NO_ERROR;
}

/*
 * API to initialize the INTERRUPT APP
 */
INTERRUPT_STATUS_t INTERRUPT_Init(const INTERRUPT_t *const handler)
{
  XMC_ASSERT("INTERRUPT_Init:HandlePtr NULL", (handler != NULL));
  
#if(UC_FAMILY == XMC4)

  NVIC_SetPriority(handler->node,
                   NVIC_EncodePriority(NVIC_GetPriorityGrouping(),
                                       handler->priority,
                                       handler->subpriority));
  if (handler->enable_at_init == true)
  {
    INTERRUPT_Enable(handler);
  }
#endif

#if(UC_FAMILY == XMC1)
  NVIC_SetPriority(handler->node, handler->priority);
  
#if (UC_SERIES == XMC14)
  XMC_SCU_SetInterruptControl((uint8_t)handler->node, (XMC_SCU_IRQCTRL_t)((handler->node << 8) | handler->irqctrl));
#endif

  /* Enable the interrupt if enable_at_init is enabled */
  if (handler->enable_at_init == true)
  {
    INTERRUPT_Enable(handler);
  }
#endif

  return (INTERRUPT_STATUS_SUCCESS);
}

/*  Function to configure SCU Interrupts based on  user configuration.
 * 
 */
void NVIC_SCU001_Init()
{
  FUNCTION_ENTRY(GID_NVIC_SCU001,NVIC_SCU001_FUNC_ENTRY);
  NVIC_SetPriority(64, NVIC_EncodePriority(NVIC_GetPriorityGrouping(),63,0));
  /* Enable Interrupt */
  NVIC_EnableIRQ(64); 
 
  FUNCTION_EXIT(GID_NVIC_SCU001,NVIC_SCU001_FUNC_EXIT);
}

void clock_init( )
{
	u_long nirq_Priority = 0;
	current_clock = 0;
	/* Setup SysTick Timer for 1 msec interrupts  */
	if (SysTick_Config(CMU_ClockFreqGet(cmuClock_CORE) / 1000)) while (1) ;
	nirq_Priority = NVIC_EncodePriority(INT_SYSTICK_nIRQ_GROUP, INT_SYSTICK_nIRQ_PREP, INT_SYSTICK_nIRQ_SUBP);
	NVIC_SetPriority(SysTick_IRQn, nirq_Priority);
}

/**  Function to initialize the NVIC node parameters based on 
 *  UI configuration.
 */
void NVIC002_Init(void)
{
  /*<<<DD_NVIC002_API_1>>>*/  
  FUNCTION_ENTRY(GID_NVIC002,NVIC002_FUNC_ENTRY);	
  // Set Interrupt Priority for NVIC 5 Node App Instance 0  
  NVIC_SetPriority(5, NVIC_EncodePriority(NVIC_GetPriorityGrouping(),63,0));   
  /* Enable Interrupt */
  NVIC_EnableIRQ(5);
  FUNCTION_EXIT(GID_NVIC002,NVIC002_FUNC_EXIT);
}

/**
  * @brief   Main program.
  * @param  None
  * @retval None
  */
int main(void)
{
  /*!< At this stage the microcontroller clock setting is already configured, 
       this is done through SystemInit() function which is called from startup
       file (startup_stm32f10x_xx.s) before to branch to application main.
       To reconfigure the default setting of SystemInit() function, refer to
       system_stm32f10x.c file
     */     
       
  /* Initialize LED1..LED4, Key and Wakeup Buttons mounted on STM3210X-EVAL 
     board */       
  STM_EVAL_LEDInit(LED1);
  STM_EVAL_LEDInit(LED2);
  STM_EVAL_LEDInit(LED3);
  STM_EVAL_LEDInit(LED4);
  STM_EVAL_PBInit(BUTTON_KEY, BUTTON_MODE_EXTI);
  STM_EVAL_PBInit(BUTTON_WAKEUP, BUTTON_MODE_EXTI); 

  /* Configure one bit for preemption priority */
  NVIC_PriorityGroupConfig(NVIC_PriorityGroup_1);
  
  /* Enable the WAKEUP_BUTTON_EXTI_IRQn Interrupt */
  NVIC_InitStructure.NVIC_IRQChannel = WAKEUP_BUTTON_EXTI_IRQn;
  NVIC_InitStructure.NVIC_IRQChannelPreemptionPriority = PreemptionPriorityValue;
  NVIC_InitStructure.NVIC_IRQChannelSubPriority = 0;
  NVIC_InitStructure.NVIC_IRQChannelCmd = ENABLE;
  NVIC_Init(&NVIC_InitStructure);
  
  /* Enable the KEY_BUTTON_EXTI_IRQn Interrupt */
  NVIC_InitStructure.NVIC_IRQChannel = KEY_BUTTON_EXTI_IRQn;
  NVIC_InitStructure.NVIC_IRQChannelPreemptionPriority = 0;
  NVIC_InitStructure.NVIC_IRQChannelSubPriority = 1;
  NVIC_InitStructure.NVIC_IRQChannelCmd = ENABLE;
  NVIC_Init(&NVIC_InitStructure);
  
  /* Configure the SysTick Handler Priority: Preemption priority and subpriority */
  NVIC_SetPriority(SysTick_IRQn, NVIC_EncodePriority(NVIC_GetPriorityGrouping(), !PreemptionPriorityValue, 0));
    
  while (1)
  {
    if(PreemptionOccured != FALSE)
    {
      STM_EVAL_LEDToggle(LED1);
      Delay(0x5FFFF);
      STM_EVAL_LEDToggle(LED2);
      Delay(0x5FFFF);
      STM_EVAL_LEDToggle(LED3);
      Delay(0x5FFFF);
      STM_EVAL_LEDToggle(LED4);
      Delay(0x5FFFF); 
    }
  }
}

/**
  * @brief  Sets the priority of an interrupt.
  * @param  IRQn: External interrupt number.
  *         This parameter can be an enumerator of IRQn_Type enumeration
  *         (For the complete STM32 Devices IRQ Channels list, please refer to the appropriate CMSIS device file (stm32f4xxxx.h))
  * @param  PreemptPriority: The preemption priority for the IRQn channel.
  *         This parameter can be a value between 0 and 15
  *         A lower priority value indicates a higher priority 
  * @param  SubPriority: the subpriority level for the IRQ channel.
  *         This parameter can be a value between 0 and 15
  *         A lower priority value indicates a higher priority.          
  * @retval None
  */
void HAL_NVIC_SetPriority(IRQn_Type IRQn, uint32_t PreemptPriority, uint32_t SubPriority)
{ 
  uint32_t prioritygroup = 0x00;
  
  /* Check the parameters */
  assert_param(IS_NVIC_SUB_PRIORITY(SubPriority));
  assert_param(IS_NVIC_PREEMPTION_PRIORITY(PreemptPriority));
  
  prioritygroup = NVIC_GetPriorityGrouping();
  
  NVIC_SetPriority(IRQn, NVIC_EncodePriority(prioritygroup, PreemptPriority, SubPriority));
}

/**
  * @brief  Main program
  * @param  None
  * @retval None
  */
int main(void)
{
  /*!< At this stage the microcontroller clock setting is already configured, 
       this is done through SystemInit() function which is called from startup
       files (startup_stm32f40_41xxx.s/startup_stm32f427_437xx.s/startup_stm32f429_439xx.s)
       before to branch to application main. 
       To reconfigure the default setting of SystemInit() function, refer to
       system_stm32f4xx.c file
     */       
  
  /* NVIC configuration ------------------------------------------------------*/
  NVIC_Config();     
  
  /* Initialize LEDs mounted on EVAL board */       
  STM_EVAL_LEDInit(LED1);
  STM_EVAL_LEDInit(LED2);
  STM_EVAL_LEDInit(LED3);
  STM_EVAL_LEDInit(LED4);
  
  /* Initialize the KEY/Tamper and Wakeup buttons mounted on EVAL board */  
  STM_EVAL_PBInit(BUTTON_KEY_TAMPER, BUTTON_MODE_EXTI);
  STM_EVAL_PBInit(BUTTON_WAKEUP, BUTTON_MODE_EXTI); 

  /* Configure the SysTick Handler Priority: Preemption priority and subpriority */
  NVIC_SetPriority(SysTick_IRQn, NVIC_EncodePriority(NVIC_GetPriorityGrouping(), !ubPreemptionPriorityValue, 0));

  while (1)
  {
    if(ubPreemptionOccurred != 0)
    {
      /* Toggle LED1 */
      STM_EVAL_LEDToggle(LED1);
      
      /* Insert delay Time */
      Delay(0x5FFFF);
      
      /* Toggle LED2 */
      STM_EVAL_LEDToggle(LED2);
      
      Delay(0x5FFFF);
      
      /* Toggle LED3 */
      STM_EVAL_LEDToggle(LED3);
      
      Delay(0x5FFFF);
      
      /* Toggle LED4 */
      STM_EVAL_LEDToggle(LED4);
      
      Delay(0x5FFFF); 
    }
  }
}