本帖最后由 wxp443 于 2021-12-24 14:15 编辑
typedef enum
{
NVIC_PRIORITY_GROUP_0 = ((uint32_t)0x700), /*!< 0 bits for preemption priority, 4 bits for subpriority */
NVIC_PRIORITY_GROUP_1 = ((uint32_t)0x600), /*!< 1 bits for preemption priority, 3 bits for subpriority */
NVIC_PRIORITY_GROUP_2 = ((uint32_t)0x500), /*!< 2 bits for preemption priority, 2 bits for subpriority */
NVIC_PRIORITY_GROUP_3 = ((uint32_t)0x400), /*!< 3 bits for preemption priority, 1 bits for subpriority */
NVIC_PRIORITY_GROUP_4 = ((uint32_t)0x300) /*!< 4 bits for preemption priority, 0 bits for subpriority */
} nvic_priority_group_type;
/**
* @brief config nvic priority group
* @param priority_group
* this parameter can be one of the following values:
* - NVIC_PRIORITY_GROUP_0
* - NVIC_PRIORITY_GROUP_1
* - NVIC_PRIORITY_GROUP_2
* - NVIC_PRIORITY_GROUP_3
* - NVIC_PRIORITY_GROUP_4
* @retval none
*/
void nvic_priority_group_config(nvic_priority_group_type priority_group)
{
/* set the prigroup[10:8] bits according to nvic_prioritygroup value */
NVIC_SetPriorityGrouping(priority_group);
}不应该是
typedef enum
{
NVIC_PRIORITY_GROUP_0 = ((uint32_t)0x7), /*!< 0 bits for preemption priority, 4 bits for subpriority */
NVIC_PRIORITY_GROUP_1 = ((uint32_t)0x6), /*!< 1 bits for preemption priority, 3 bits for subpriority */
NVIC_PRIORITY_GROUP_2 = ((uint32_t)0x5), /*!< 2 bits for preemption priority, 2 bits for subpriority */
NVIC_PRIORITY_GROUP_3 = ((uint32_t)0x4), /*!< 3 bits for preemption priority, 1 bits for subpriority */
NVIC_PRIORITY_GROUP_4 = ((uint32_t)0x3) /*!< 4 bits for preemption priority, 0 bits for subpriority */
} nvic_priority_group_type;
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