计数器模式中的中心对齐模式在库里为什么有三个?他们有什么区别吗?
#define TIM_CounterMode_Up ((uint16_t)0x0000)
#define TIM_CounterMode_Down ((uint16_t)0x0010)
#define TIM_CounterMode_CenterAligned1 ((uint16_t)0x0020)
#define TIM_CounterMode_CenterAligned2 ((uint16_t)0x0040)
#define TIM_CounterMode_CenterAligned3 ((uint16_t)0x0060)
#define IS_TIM_COUNTER_MODE(MODE) (((MODE) == TIM_CounterMode_Up) ||
((MODE) == TIM_CounterMode_Down) ||
((MODE) == TIM_CounterMode_CenterAligned1) ||
((MODE) == TIM_CounterMode_CenterAligned2) ||
((MODE) == TIM_CounterMode_CenterAligned3)) |