STM8中断优先级不够的问题
STM8L 中，中断优先级通过下面函数设置，但此处仅 ITC_PriorityLevel_1，ITC_PriorityLevel_2，ITC_PriorityLevel_3总共才3个中断优先级可设置，若我超过3个中断，该怎么设置？/**
* @briefSets the software priority of the specified interrupt source.
* @note The modification of the software priority is only possible when
* the interrupts are disabled.
* @note The normal behavior is to disable the interrupt before calling
* this function, and re-enable it after.
* @note The priority level 0 cannot be set (see product specification
* for more details).
* @paramIRQn : Specifies the peripheral interrupt source.
* @paramITC_PriorityLevel : Specifies the software priority value to set
* This parameter can be one of the following values:
* @arg ITC_PriorityLevel_0: Software priority level 0 (cannot be written)
* @arg ITC_PriorityLevel_1: Software priority level 1
* @arg ITC_PriorityLevel_2: Software priority level 2
* @arg ITC_PriorityLevel_3: Software priority level 3
* @retval None
*/
void ITC_SetSoftwarePriority(IRQn_TypeDef IRQn, ITC_PriorityLevel_TypeDef ITC_PriorityLevel)
{
}
分硬件优先级和软件优先级，没设置软件优先级的默认为硬件的优先级 实际上相同优先级的会顺序响应。不是说每个中断要有独立的优先级。理解错了啊。
所以，这么几个优先级就够了。
优先级的含义是，可以打断低优先级的中断。实际上不允许你嵌套太多的中断。非常费堆栈。
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