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                今天在做處理一個中斷按鍵的時候,總是避免不了抖動的影響! ![](https://box.kancloud.cn/2016-06-21_576915b9caf52.jpg) 像這個按鍵信號,如果我們用一般的掃描方式的話,用一個延時就可以解決了,但是我們用中斷的話,怎么辦? 這樣明顯會中斷5次,在51里面還好,在進入中斷的時候,可以把中斷屏蔽了,但是51屏蔽中斷之后,其他中斷就不能觸發了,在stm32,甚至任意一個平臺都一樣,有人說關掉這個中斷源,我大致試了一下,最后程序都卡死!跑飛了。。所以這種也方法不可以去! 既然是這樣,我們用一個中斷程序執行標志符怎么? ~~~ void EXTI0_IRQHandler(void) { static u8 button = 0; if(RESET == EXTI_GetFlagStatus(EXTI_Line0))return; if(!button){ button = 1; delay(KEY_DELAY); if(!(GPIOA->IDR & (1<<0)))goto end; /******************/ /******************/ end: button = 0; } EXTI_ClearFlag(EXTI_Line0); } ~~~ button2起到標志位的作用,他必須是靜態變量,delay適當的延時,這樣就可以解決這個問題了!
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