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。。。。重复了

配置的是32位unchained定时。中断可以发生,但是不管设置的中断周期是多少中断都是以不变的周期进行的,大概是1s钟中断7,8次。读取定时器配置发现各个寄存器配置正常。请问可能是哪里的问题?