void nvic_prioritygroupconfig(uint32_t nvic_prioritygroup);
#define nvic_prioritygroup_0 ((uint32_t)0x700)
/*!< 0 bits for pre-emption priority
4 bits for subpriority */
#define nvic_prioritygroup_1 ((uint32_t)0x600)
/*!< 1 bits for pre-emption priority
3 bits for subpriority */
#define nvic_prioritygroup_2 ((uint32_t)0x500)
/*!< 2 bits for pre-emption priority
2 bits for subpriority */
#define nvic_prioritygroup_3 ((uint32_t)0x400)
/*!< 3 bits for pre-emption priority
1 bits for subpriority */
#define nvic_prioritygroup_4 ((uint32_t)0x300)
/*!< 4 bits for pre-emption priority
0 bits for subpriority */
typedef
struct
nvic_inittypedef;
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== nvic_prioritygroup | nvic_irqchannelpreemptionpriority | nvic_irqchannelsubpriority | description
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== nvic_prioritygroup_0 |0|
0-15|
0 bits for pre-emption priority
|||4 bits for subpriority
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-- nvic_prioritygroup_1 |0-
1|0-
7|1 bits for pre-emption priority
|||3 bits for subpriority
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nvic_prioritygroup_2 |0-
3|0-
3|2 bits for pre-emption priority
|||2 bits for subpriority
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nvic_prioritygroup_3 |0-
7|0-
1|3 bits for pre-emption priority
|||1 bits for subpriority
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nvic_prioritygroup_4 |0-
15|0|
4 bits for pre-emption priority
|||0 bits for subpriority
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沒有組優先順序這種東西！！！！！！！！！！
nvic_irqchannelpreemptionpriority 搶占式優先順序
nvic_irqchannelsubpriority 響應式優先順序
第一條，高搶占式優先順序可以打斷低搶占式優先順序
第二條，相同搶占式優先順序之間，低響應式優先順序不會被打斷
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