stm32f0没有中断优先级分组？

包大人很忙

我在f0的sdk上没找到 设置中断优先级分组的函数，那么f0缺了抢占优先级还是响应优先级呢？

DreamWaterPro

从数据手册上来看，貌似还是真的F0系列不支持中断优先级分组，其NVIC控制器只有可编程的四级中断优先级：


不过个人对F0系列不了解，仅供参考。

正点原子

F0应该也有中断分组吧，你是不是看漏了？

Liyuanlnx

F0系列里有PreemptPriority，没有SubPriority
/**
  * @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 stm32f0xx.h file)
  * @param  PreemptPriority The preemption priority for the IRQn channel.
  *         This parameter can be a value between 0 and 3.
  *         A lower priority value indicates a higher priority
  * @param  SubPriority the subpriority level for the IRQ channel.
  *         with stm32f0xx devices, this parameter is a dummy value and it is ignored, because
  *         no subpriority supported in Cortex M0 based products.   
  * @retval None
  */
void HAL_NVIC_SetPriority(IRQn_Type IRQn, uint32_t PreemptPriority, uint32_t SubPriority)
{
  /* Check the parameters */
  assert_param(IS_NVIC_PREEMPTION_PRIORITY(PreemptPriority));
  NVIC_SetPriority(IRQn,PreemptPriority);
}

Liyuanlnx

because no subpriority supported in Cortex M0 based products.