stm32库升级到3.3.0后systick中断优先级如何设定

maidi0018 2010-6-18 11:37 楼主

stm32库升级到3.3.0 后原来的函数NVIC_SystemHandlerPriorityConfig没有了。
这个函数是用来定义Cortex-M3 中断的，在V3.3.0中没找到与之相对应的函数。
请高手指点一二，谢谢

回复评论（7）

沙发 baihe

NVIC_PriorityGroupConfig(NVIC_PriorityGroup_2); // 2 bit for pre-emption priority, 2 bits for subpriority

NVIC_SetPriority (SysTick_IRQn, 0); // the highest priority */

点赞 2010-6-18 12:43

谢谢，高人指点。我找到了他的函数原型static __INLINE void NVIC_SetPriority(IRQn_Type IRQn, uint32_t priority)
{
  if(IRQn < 0) {
SCB->SHP[((uint32_t)(IRQn) & 0xF)-4] = ((priority << (8 - __NVIC_PRIO_BITS)) & 0xff); } /* set Priority for Cortex-M3 System Interrupts */
  else {
NVIC->IP[(uint32_t)(IRQn)] = ((priority << (8 - __NVIC_PRIO_BITS)) & 0xff); }       /* set Priority for device specific Interrupts  */
}

点赞 2010-6-18 13:51

         RCC->APB2ENR &= ~GPIO_APB2_BUS;
         RCC->APB2ENR |=  WAKEUP_GPIO_APB2;

#if (__WAKEUP_AFIO_CEN & 0x01)                         /* AFIO 配置                               */
#if (__WAKEUP_AFIO_CEN & 0x02)
         AFIO->EVCR = __WAKEUP_AFIO_EVCR;
#endif
#if (__WAKEUP_AFIO_CEN & 0x04)
         AFIO->MAPR = __WAKEUP_AFIO_MAPR;
#endif
#if (__WAKEUP_AFIO_CEN & 0x08)
         AFIO->EXTICR[0] = __WAKEUP_AFIO_EXTICR1;
         AFIO->EXTICR[1] = __WAKEUP_AFIO_EXTICR2;
         AFIO->EXTICR[2] = __WAKEUP_AFIO_EXTICR3;
         AFIO->EXTICR[3] = __WAKEUP_AFIO_EXTICR4;
#endif
#endif

#if __WAKEUP_GPIOA_CEN
         GPIOA->ODR = __WAKEUP_GPIOA_DR;
         GPIOA->CRL = __WAKEUP_GPIOA_CRL;
         GPIOA->CRH = __WAKEUP_GPIOA_CRH;
#endif

#if __WAKEUP_GPIOB_CEN
         GPIOB->ODR = __WAKEUP_GPIOB_DR;
         GPIOB->CRL = __WAKEUP_GPIOB_CRL;
         GPIOB->CRH = __WAKEUP_GPIOB_CRH;
#endif

#if __WAKEUP_GPIOC_CEN
         GPIOC->ODR = __WAKEUP_GPIOC_DR;
         GPIOC->CRL = __WAKEUP_GPIOC_CRL;
         GPIOC->CRH = __WAKEUP_GPIOC_CRH;
#endif

#if __WAKEUP_GPIOD_CEN
         GPIOD->ODR = __WAKEUP_GPIOD_DR;
         GPIOD->CRL = __WAKEUP_GPIOD_CRL;
         GPIOD->CRH = __WAKEUP_GPIOD_CRH;
#endif

#if __WAKEUP_GPIOE_CEN
         GPIOE->ODR = __WAKEUP_GPIOE_DR;
         GPIOE->CRL = __WAKEUP_GPIOE_CRL;
         GPIOE->CRH = __WAKEUP_GPIOE_CRH;
#endif