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关于430捕获中断定时问题



你好,,最近在调430G2553的中断,基本目标是可以实现对于持续变化跳变沿可以捕获中断,,在中断读取CCR0值,,发现不管频率多少,,TAR的值都是一样的,,中断频率是正确的,,TAR不是定时开始就计数么?为什么不受中断间隔影响么?麻烦了。。。