用了好久delay20ms的按键消抖,觉得很不爽! 我这么牛B的工程师怎么能用delay呢!8 ]: ?; J/ i" S+ t0 W: Q: f/ s# X9 F 于是手撸一个无延迟的按键消抖.) y! d9 ?" ~% m) ]7 I & s, m- H# u- R# X. T7 F8 i N #define KEY2 GPIOE, 47 z8 ~) k3 u3 I# h! p uint32_t Key2Level, Key2Tick;- i `6 ?0 C: G4 z7 V# {$ f int main() {1 k( j) p& \- |7 x Tick_Init(); // Tick是开机以来的微秒数9 t9 }& x9 {' q6 \2 C Z/ h2 R IO_Config(KEY2, IO_IN_PU);, Q2 n$ ?: _! ^- Z, E ` t EXTI_Config(KEY2, EXTI_RISING|EXTI_FALLING); Key2Level = IO_IN(KEY2);; f6 A, o: p; x1 G- ^- U NVIC_EnableIRQ(EXTI4_IRQn); 2 m$ B2 E# b e1 c+ U' n I for (;;); } int n;7 t' Z% ]7 \: n9 o6 Y ISR(EXTI4_IRQn)9 X( m0 ]1 w4 I: z7 e8 X( I4 n) I7 b { if (Key2Level && Tick - Key2Tick > 10000)7 i0 f5 \4 V9 q* i) Q { n++; // 做你喜欢做的事. c' Y, R e$ | } EXTI_ClearFlag(KEY2);" D8 o4 X7 X& h Key2Level = IO_IN(KEY2);6 c4 X2 I/ t0 l. c+ a Key2Tick = Tick; } |