用枚举内型写的简单按键驱动，很方便！

caizhiwei · 2015-01-13T00:59:30+00:00

//按键端口定义，有些电路是上拉,要特别注意原理图sch' q: C6 D# _' T " B, ]8 s' X- y1 {2 e //KEY1 : PB12 10K pull down 高电平有效" @! h" I$ v# G& l, |/ @ //KEY2 : PB13 10K pull down 高电平有效/ N3 V' k3 o2 C //KEY3 : PB14 10K pull down 高电平有效2 D4 [, t9 G" V //KEY4 : PB15 10K pull down 高电平有效1 t* w' {/ i1 o* h- ?( M0 {4 y. p // 3 I; u# X( y$ S" ?3 S1 }$ p4 X/ Z6 i% c! g- x; w #ifndef __KEY_H " A% w! ?# N8 c- ]1 W- _#define __KEY_H 8 N0 G3 z5 V7 C' R: Q $ X" U" o- D! C. L. w7 R#include "stm32f10x.h"8 l& i4 K; k; F8 d$ S7 v# C #include "delay.h" ' Z" h! N, [/ X; \; J9 \- e9 E( n! Q; C2 }/ s ; `& V/ n% `! ^% z/ itypedef enum . @6 q, s& V1 G{ % c) v# ?! }8 \1 P" }# [0 J KEY_NONE = 0X00, //% X6 `; d# f" }& S6 m KEY_UP = 0X10, // 8 Z& Y! _5 @! d3 ~; m KEY_DOWN = 0x20, // ; H2 c8 c. y) p6 q KEY_LEFT = 0x40, // , x3 ~9 f' l" A- e8 T1 o KEY_RIGHT = 0x803 M' D' J+ s2 L( h" ~5 h } KeyValue; 8 X, d- B& n8 u, l' p/ J% p - U0 x% q3 V h4 ?; k 9 H. e; O" j* k2 g3 t$ z2 b #define KEY1 GPIO_ReadInputDataBit(GPIOB,GPIO_Pin_12) . r# S* ~/ I- _#define KEY2 GPIO_ReadInputDataBit(GPIOB,GPIO_Pin_13)7 T* [5 [, a9 |7 d" S #define KEY3 GPIO_ReadInputDataBit(GPIOB,GPIO_Pin_14) " y/ ~/ c( C1 |2 G! E* r e6 R( o#define KEY4 GPIO_ReadInputDataBit(GPIOB,GPIO_Pin_15)% J" f8 e( g- H* T2 g" t" J$ t$ x ; \/ Z" \, t$ K, \# a7 R9 { void KEY_Init(void);) |& @1 w! J( d9 Q! ` KeyValue KEY_Scan(void); 3 }2 }1 U. ^3 |" e* W k$ w , E. D! l }7 R, k6 o& m# U#endif 8 n/ }' O# W; c# ^ G/ ~5 G复制代码下面是C文件：. u" E0 h! V$ ]& O5 [3 K3 T #include "key.h" ' I, O# A7 b; o9 C0 D5 `7 w8 y: {7 A+ s9 B) _" Y: l( G! F. E B1 F8 q1 M3 O) r' j+ | void KEY_Init(void) //IO初始化 * F q/ y0 [( w7 y{ $ }% Y. p$ o- E- c RCC_APB2PeriphClockCmd(RCC_APB2Periph_GPIOA,ENABLE); , g9 o6 O/ }$ l# l" }# O3 m6 x GPIO_InitTypeDef GPIO_InitStructure; //初始化KEY" {. I$ p/ L2 `+ B GPIO_InitStructure.GPIO_Pin = GPIO_Pin_12|GPIO_Pin_13|GPIO_Pin_14|GPIO_Pin_15; 1 c- L8 g1 S0 H! v5 h' _" o GPIO_InitStructure.GPIO_Mode = GPIO_Mode_IPD; // pull-DOWN input 0 {9 r6 R8 {$ g: c GPIO_InitStructure.GPIO_Speed = GPIO_Speed_10MHz; & @, Y" e e( z7 o% ]$ V+ V4 M* Y GPIO_Init(GPIOB, &GPIO_InitStructure); * G) d! `$ g! u$ ?: U1 @9 Z9 D* E( U9 H% Y } / ]( {# ]7 Y9 g9 [* |+ T) U3 [5 y7 H& @4 X0 l/ ~ y ' K( y: k: v, P* y+ k+ n/ C0 H5 ? KeyValue KEY_Scan(void) 1 v, ?' T% g9 U2 j3 b/ A{ 4 q, `* I/ H, p! w4 P$ w : @7 O7 [) C0 x. O6 Z if(KEY1==1||KEY2==1||KEY3==1||KEY4==1) //任意一个按键按下 . z5 i5 i; @& Q/ e" U {, g) ?3 c! p, b delay_ms(10); //去抖动 , I# A# i; |7 g! |7 S% m ' T; i( h# C7 C% ?- Z# e9 r7 R0 I. [ if(KEY1==1) 4 Y# F7 f" T& T. q" P { 8 o- J! f7 b* F+ ?2 N return KEY_UP; //keyvalue in your app 0 s! L+ x' }- k/ m: @ }6 G& s% ]# M2 S0 k C- V# S else if(KEY2==1) 9 Y3 _# Z/ n- s6 e. l { ) k( q r1 C: g0 a# T return KEY_DOWN; //keyvalue in your app . P. r" {# Y: v9 f8 T } " Y5 @ {7 `, b! p else if(KEY3==1)6 r" V& Z- \/ |$ L) a k* F9 w, V { ) o4 T E- |( ]/ a return KEY_LEFT; //keyvalue in your app ' j. i7 ?8 _" c( f }# W0 D1 ], U( x m! _ else if(KEY4==1) / h' V: A# m$ D { : M& S2 Z4 g* ~; W* h return KEY_RIGHT; //keyvalue in your app ) a0 |$ }# E) ] } ; c' V+ S% ^+ {' C } . k$ I! M) s0 ]1 \) f! F else //if(KEY1&&KEY2) : N9 f( E" J+ m, p5 _6 f. b$ W4 R return (KEY_NONE);// 无按键按下 , z, M* m" M. d; W$ ]" Q return KEY_NONE; 4 ~+ |7 z0 K( \ U: a}复制代码main函数调用： , h* W2 e' A7 J4 S9 h KeyValue KeyCurrentValue = KEY_NONE; ' ^. M N1 @8 p# A' O3 ^ 6 c$ T. ~0 r$ |' b* c N$ U7 r5 s& S KeyCurrentValue = KEY_Scan(); 8 n' F/ t- y7 J4 p3 g* I0 A1 k' ^% c9 t2 s9 a& R# F if(KeyCurrentValue==KEY_UP)printf("######## The KEY UP is OK ! \r\n"); 0 s: h( Q* g/ f/ J if(KeyCurrentValue==KEY_DOWN)printf("######## The KEY DOWN is OK ! \r\n"); : K6 g& l5 j! |$ U+ \' n# G if(KeyCurrentValue==KEY_LEFT)printf("######## The KEY LEFT is OK ! \r\n"); & A& t; {) D: {4 u# B# h if(KeyCurrentValue==KEY_RIGHT)printf("######## The KEY RIGHT is OK ! \r\n");复制代码哈哈，很简洁，很好用，任何mcu都可以直接用！ # @& m! g& |$ |3 c1 z. |& q " } P+ Q/ P: f6 _! K, Z; C

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caizhiwei 发布时间：2015-1-13 08:59

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//按键端口定义，有些电路是上拉,要特别注意原理图sch

//KEY1 : PB12  10K pull down 高电平有效
//KEY2 : PB13  10K pull down 高电平有效
//KEY3 : PB14  10K pull down 高电平有效
//KEY4 : PB15  10K pull down 高电平有效
//

#ifndef __KEY_H
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#define __KEY_H
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#include "stm32f10x.h"8 l& i4 K; k; F8 d$ S7 v# C
#include "delay.h"
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typedef enum
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{
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KEY_NONE = 0X00, //% X6 `; d# f" }& S6 m
KEY_UP = 0X10, //
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KEY_DOWN = 0x20, //
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KEY_LEFT = 0x40, //
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KEY_RIGHT = 0x803 M' D' J+ s2 L( h" ~5 h
} KeyValue;
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#define KEY1 GPIO_ReadInputDataBit(GPIOB,GPIO_Pin_12)
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#define KEY2 GPIO_ReadInputDataBit(GPIOB,GPIO_Pin_13)7 T* [5 [, a9 |7 d" S
#define KEY3 GPIO_ReadInputDataBit(GPIOB,GPIO_Pin_14)
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#define KEY4 GPIO_ReadInputDataBit(GPIOB,GPIO_Pin_15)% J" f8 e( g- H* T2 g" t" J$ t$ x
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void KEY_Init(void);) |& @1 w! J( d9 Q! `
KeyValue KEY_Scan(void);
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#endif
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复制代码

下面是C文件：

#include "key.h"
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void KEY_Init(void) //IO初始化
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RCC_APB2PeriphClockCmd(RCC_APB2Periph_GPIOA,ENABLE); , g9 o6 O/ }$ l# l" }# O3 m6 x
GPIO_InitTypeDef GPIO_InitStructure; //初始化KEY" {. I$ p/ L2 `+ B
GPIO_InitStructure.GPIO_Pin = GPIO_Pin_12|GPIO_Pin_13|GPIO_Pin_14|GPIO_Pin_15;
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GPIO_InitStructure.GPIO_Mode = GPIO_Mode_IPD; // pull-DOWN input
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GPIO_InitStructure.GPIO_Speed = GPIO_Speed_10MHz;
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GPIO_Init(GPIOB, &GPIO_InitStructure);
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}
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KeyValue KEY_Scan(void)
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{
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if(KEY1==1||KEY2==1||KEY3==1||KEY4==1) //任意一个按键按下
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delay_ms(10); //去抖动
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if(KEY1==1)
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return KEY_UP; //keyvalue in your app
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else if(KEY2==1)
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return KEY_DOWN; //keyvalue in your app
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}
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else if(KEY3==1)6 r" V& Z- \/ |$ L) a k* F9 w, V
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return KEY_LEFT; //keyvalue in your app ' j. i7 ?8 _" c( f
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else if(KEY4==1)
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{
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return KEY_RIGHT; //keyvalue in your app
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}
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else //if(KEY1&&KEY2)
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return (KEY_NONE);// 无按键按下
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return KEY_NONE;
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}

复制代码

main函数调用：

KeyValue KeyCurrentValue = KEY_NONE;
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KeyCurrentValue = KEY_Scan();
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if(KeyCurrentValue==KEY_UP)printf("######## The KEY UP is OK ! \r\n");
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if(KeyCurrentValue==KEY_DOWN)printf("######## The KEY DOWN is OK ! \r\n");
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if(KeyCurrentValue==KEY_LEFT)printf("######## The KEY LEFT is OK ! \r\n");
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if(KeyCurrentValue==KEY_RIGHT)printf("######## The KEY RIGHT is OK ! \r\n");