- #define HAVEKEY_PIN 0x0003 //0 H9 @' v$ z- Z% X4 d" x
- #define KEYPOP 0x0000& \' ^8 u+ Q( Y% R
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- #define KEY_START_PRESSED 1 //
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- typedef struct
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- INT8U bLastValue; //
" o0 V T- @, t$ U - INT8U bDebunceTime; //
6 E3 A0 }7 h1 b6 T - INT8U bPressed; //
8 Y3 ~9 M% e* f q5 J, o - INT8U bValue; //
1 L9 D, L1 l. z - INT8U bState; // 0 [. K" u8 i- O i5 {
- } tKEY;
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" Y* i' S9 E( R: P3 j3 h0 h. p" Y) t1. 按键IO口配置6 I4 W. Z2 a( [4 U( `& A
3 g% V; P! p, o+ y- void KEY_Init(void)
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- GPIO_InitTypeDef GPIO_InitStruct;
& N# H8 X* U. n Z9 `( n/ }5 o - RCC_AHBPeriphClockCmd(RCC_AHBPeriph_KEY_PORT, ENABLE);
( E1 M2 S: R1 i - GPIO_InitStruct.GPIO_Pin = PAUSE_KEY_PIN | CLEAR_KEY_PIN ;//| ENTER_KEY_PIN | SET_KEY_PIN ;: a+ J- _, t( J+ I
- GPIO_InitStruct.GPIO_Mode = GPIO_Mode_IN; //GPIO_Mode_AF,GPIO_Mode_OUT+ S8 U H" d( u0 {& _- X
- GPIO_InitStruct.GPIO_Speed = GPIO_Speed_Level_2;
4 J7 L4 ?; L6 Z. W& r - GPIO_InitStruct.GPIO_PuPd = GPIO_PuPd_UP;
2 a7 O- g6 Y) W0 q - GPIO_Init(GPIO_KEY_PORT, &GPIO_InitStruct);
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- memset( &KeyCtrl,0,sizeof(tKEY));
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2. 按键debunce时间,在timer里调用9 e7 _1 S6 w+ Y" ]
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- void KeyCtrlbDebunceTimeDec(void)
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- if(KeyCtrl.bDebunceTime)
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3 Q; W6 a+ } s f* l( C4 G - KeyCtrl.bDebunceTime--;
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- {
0 M) V% y9 ]% Q - KeyCtrl.bDebunceTime = 20;9 k: Q; \ Q; U$ q5 k
- }
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3. 扫描按键0 D% C0 V. X( N) x, d8 s- _
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- INT8U KeyScan(u8 *bKeyValue)) x$ I" o0 B, c. Y7 a9 d: |% d0 b+ ?
- {
% R! m0 I r! w$ S! n - int TempKeyIn;3 f. p, K7 a. t0 {
- TempKeyIn = GPIO_ReadInputData(GPIO_KEY_PORT);2 f+ L- I$ c- _ i4 g2 }" a" S
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- TempKeyIn = GPIO_ReadInputData(GPIO_KEY_PORT) & HAVEKEY_PIN; //get high 8 bit. D1 V' {9 S# z5 Z4 u( f% R" X' X. i
- TempKeyIn = (TempKeyIn ^ 0xffff) & HAVEKEY_PIN;) V; ?- z* T" n* {. \( y/ P4 i
- if(TempKeyIn == 0x0000) //no key pressed
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! `# |3 n ` V, V! m H9 C( n1 {' [ - memset( &KeyCtrl,0,sizeof(tKEY)); . ^: M+ ^5 z% k Q1 g. r! c& P
- return NOKEY_PRESSED;
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- if(KeyCtrl.bState != KEY_START_PRESSED) //start key pressed
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% f7 t0 ^6 ~. d0 r- f+ H& k - KeyCtrl.bState = KEY_START_PRESSED;" M1 k4 e( J& i+ J ]- a
- KeyCtrl.bDebunceTime = 20; //10ms
3 w' }! l+ `2 r" D+ {# W - return NOKEY_PRESSED;0 b7 E: a; f# @6 y, p \- x( @) s0 R3 S
- }
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1 R5 d) v5 M: Z- ^( U - if(TempKeyIn == KeyCtrl.bLastValue) //lastkey; P. a+ r( \0 n# J% t: @
- {
7 Q' r* H. _7 `5 Z2 y7 ~% ]6 A$ B& W - return NOKEY_PRESSED;2 m* C. m' e/ x; Y% y7 e
- }
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- {
' h* `: u8 j: W7 n. X) H - if(KeyCtrl.bDebunceTime !=0) //debunce time? 10ms2 d& R7 H$ |5 c! H0 ^0 P5 x5 f3 d! p. T
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- return NOKEY_PRESSED;" V$ Q: s) J/ J1 N2 h) O5 }6 A
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- else' \# Q0 l6 O0 H# G
- {
' T% o% ~6 R" b - KeyCtrl.bLastValue = TempKeyIn;
; o/ ]9 \/ d; W8 ?8 U D5 V - KeyCtrl.bValue = TempKeyIn;4 e2 R& i/ I' J a2 B8 F
- *bKeyValue = TempKeyIn;4 p" U; @% _* c) h/ I% v* l
- return KEY_PRESSED;
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- }
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& K. p5 `& ~/ }- M4. 按键处理4 g; v2 j( o& Z$ W7 w5 O; ^+ e; E
2 ^+ a, D3 a+ ]4 \: e- void KeyPro(void)
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- u8 KeyValue;3 k% r5 W$ P/ O( V: l- w9 \
- if(KeyScan(&KeyValue) == KEY_PRESSED)3 Y% L# @6 ^& w9 F2 s7 @
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- if(KeyValue == CLEAR_KEY)
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- ExtiCnt = 0;& n9 G4 f+ ?) A! n7 t2 z6 Z
- }
' w" c3 p- K' m, p r3 a - else if(KeyValue == PAUSE_KEY)
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4 H; G+ t* D- A/ P - PauseFlag = ~PauseFlag;6 } e4 g+ A& E1 Q0 a$ I' ~
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- }
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