6SL3352-7AE32-1AA1

6SL3352-7AE32-1AA1

6SL3352-7AE32-1AA1

高频信号输入时，中断进入很频繁，如果是 100 K 频率，你需要 5 us 进入一次（高低电平各一次，还是在占空比为 50 % 情况下，其它占空比条件更为苛刻），如果采用中断处理方式，你在中断中完成很多操作（清标志、计算、翻转极性等），同时你需要保证这两次中断不能被全局中断禁止，或者被高优先级中断打断，否则，你得到的可能就不是一次脉冲的高电平了，这样你的占空比、频率都将计算出错。

正因为有如上问题，而捕获 PWM 脉冲又是比较常见的功能，所以需要一个的捕获程序完成该工作。而鱼鹰今天介绍的实现原理我认为就是的。

6SL3352-7AE32-1AA1 

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