13问答网 > 在STM32F051的EXTI的ISR中怎么分辨是上升沿还是下降沿触发的中断

在STM32F051的EXTI的ISR中怎么分辨是上升沿还是下降沿触发的中断

2025-03-15 22:27:12
推荐回答（1个）
回答1：

测试情况如下： 1.允许更新中断 允许触发中断 定时器初始化后，第一次启动定时器5s定时，立刻进入中断，以后再启动，5s后进入中断； 2.允许更新中断 禁止触发中断 定时器初始化后，第一次启动定时器5s定时，立刻进入中断，以后再启动，5s后进入中断；同情况1； 3.禁止更新中断 允许触发中断 定时器初始化后，启动定时器5s定时，无法进入中断；

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