学习STM32库开发----简单按键驱动

STMWoodData · 2018-12-09T13:14:17+00:00

学习了《STM32库开发实战指南》的GPIO库函数操作，简单写了个按键驱动练习一下，实现了按键按下，按键弹起，按键短按弹起，按键长按，按键长按弹起，按键循环机打。有兴趣的可以看看。 - _) S" E5 l5 H主要代码如下：7 s0 p* z, m u E; z6 v, t * C7 F& L9 n8 c2 H) X9 R void wo_key_scan(wo_key_t *key)5 D: D# W! Y# t9 z1 I; e { $ o7 [' |) R/ j$ S BOOL new_state;, t/ y7 y: M- `) g 1 z2 T( {( Q& O; `# U- h, h if((key == NULL) || ! {+ [+ F" T- C; r6 @: { (key->key_para == NULL)|| ) ^5 m3 p$ O$ s( l (key->key_gpio == NULL)) return ;; q, u. x3 f: g F- C/ Z6 e, m+ N* Q# |* Q if(key->key_para->loop_time == 0) return ;: V" }; {( u7 u. L 1 W; k1 p$ D4 C new_state = key->key_gpio->get_state();6 C q2 j0 T& X! K* s if(new_state != key->old_state) //边沿, @- ^, n0 `# T* m4 \ ]! s+ S { 8 `8 p8 f, U8 u( t4 o if(new_state == key->key_gpio->init_state) //4 }4 k o4 d. y6 U" m! e' W { " L. v( y5 ~! x3 C if(key->short_relese != NULL) 1 ~: Y& t3 e' s5 [- X. i { 4 w- j9 Z2 j6 R( u2 e i( _ if(key->press_time key_para->short_time) 9 U& Q5 H0 \/ p8 p- h( n$ J4 P. G4 m key->short_relese(); //短按弹起 # ^* f* _/ y/ |) @ } 5 G- V+ I/ o+ {2 z `/ e ]4 Z1 W% R# n0 M$ [! d( N u& c- {1 h5 _: I if(key->long_relese != NULL) 6 v _( _+ j: W! s6 Z- ^ {/ V# \% g: s2 N if(key->press_time >= key->key_para->long_time) ' Q- |$ |9 B5 p7 b: S7 _ key->long_relese(); //长按弹起 I$ A1 m/ O/ l ^ } : c. N. Q7 Q5 Y' S; I. ~) P$ k# U( a if(key->relese != NULL) . |4 q+ {% s% Q5 @ key->relese(); //弹起 ( i9 `5 i1 a& x- E8 w2 d; C& A) I! a; M5 c key->press_time = 0; t; b. q9 c- D; e: q U }else //按下1 H' p% c. R- V1 i$ Y& D8 e% j { " j' L& V3 {+ g) }! g4 b+ q key->press_time = 1;1 b& e/ s; d- q& p2 V y) b 7 _7 o$ M: Y0 Z0 I) R' E; n if(key->press != NULL) ) x/ }1 w$ L- l* a7 R5 A key->press(); //按下触发9 }' {, s# ?1 K$ T! D' L/ C } . S+ E& x& T3 w# g$ K2 s/ O }else ( x3 U o3 ^* q$ I, a0 B5 B {1 A0 y, W; V' U# [# J if((key->press_time > 0) && (key->press_time long_press != NULL) 3 V$ } M$ x- a( x% b$ M {+ [$ Y/ B( S. I% S) w( ^ if(key->press_time == key->key_para->long_time) 9 b7 n* c0 l/ w$ U+ d key->long_press(); //长按 ) e. G$ ?+ E" Q1 V( x* J; Y }2 V# x/ t& W: ?6 j% C- v# d+ u8 F 4 Y5 c8 Z* ]9 ~3 L4 q8 R% V+ S if((key->press_loop != NULL)&&(key->press_time >= key->key_para- * }# C1 T: M5 {( |- _ 1 X! p+ B) K: `- i+ D$ |$ F3 n, x>short_time)) ) o; U6 r" j7 o. f! H/ T8 f7 n { w2 [% _' i8 J7 t( r4 v6 L6 P) n1 b if(((key->press_time - key->key_para->short_time) % key- ) i0 j2 l, l( r0 R. r" t5 z) f q K. [4 v b >key_para->loop_time) == 0) 9 F0 Y9 t9 P- |! l' X8 `+ L { ; x" C' C& s% a9 f) H* ` key->loop_count ++; 2 g/ {$ L" F W% T. {, U. \) K) [! q key->press_loop(); //按下连续 g( b( Q7 w) o1 M J" H J } - T7 ~$ _, B- d7 |" ~ }% L: L6 l0 w4 J4 U ! e* I# \3 A7 N2 q if(key->press_time >= (key->key_para->long_time+key->key_para- $ i, d9 I3 u7 d: \" x \/ \ # O9 \) b q; _- z% V5 i' y>loop_time)). d( v4 T8 T- h9 Q7 J* P {4 v/ Z8 d4 S* Y% M# C9 v$ p* V" o7 M key->press_time -= key->key_para->loop_time; 7 U9 ~) ^5 e: h } * K, l( |# N y2 H4 _ key->press_time++; //按下时间累加! |3 t ]0 V! i5 ~ } 7 o% c$ @! A) q# f1 u }. i$ d. ]& P, C key->old_state = new_state;" q }/ |2 A" Q } 0 |2 J8 _8 Q. B8 p4 \0 Q复制代码 (, 下载次数: 0) 上传点击文件名下载附件 4 w @- J0 \ r8 |) M 0 `. ~7 k& J8 _$ [4 P* s6 M4 `, i工程代码：4 \# v7 M5 m( n) ^/ R/ A (, 下载次数: 27) 上传点击文件名下载附件 7 D* ^1 y& g1 i+ M3 n6 |