01. 概述8 s4 M" T: S$ {: ?1 \
中断相关代码主要分布在固件库的 stm32f4xx_exti.h 和 stm32f4xx_exti.c 文件中。) B6 Z$ j: O& H8 n( e9 ]
5 m* x, K ?* h, @02. 相关类型
' F& q& L9 I- b2 LEXTI模式枚举
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EXTI触发枚举 `4 [. O, w: u, m: A, ^( ?; Y" ^$ H
3 q7 C2 s- Q! z: G( J2 l- /** ! E8 V; Z) U. Q: y
- * @brief EXTI Trigger enumeration . J- [, D6 x& w1 |5 \/ G
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- typedef enum
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3 p5 C& y3 w+ H: p I* q - EXTI_Trigger_Rising = 0x08, //上升沿
7 C9 C& i- L7 k; N' c7 f - EXTI_Trigger_Falling = 0x0C, //下降沿
) A/ i# o8 Q' L - EXTI_Trigger_Rising_Falling = 0x10 //边沿触发
# \$ u8 S$ Y c' M: M L - }EXTITrigger_TypeDef;
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- #define IS_EXTI_TRIGGER(TRIGGER) (((TRIGGER) == EXTI_Trigger_Rising) || \" _& Y4 p; j: C+ W5 g# E( \' {6 C
- ((TRIGGER) == EXTI_Trigger_Falling) || \1 a4 m& M1 _2 n, }
- ((TRIGGER) == EXTI_Trigger_Rising_Falling))
* S& ?- H: }/ i- }
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2 V1 r1 V; I' [: L5 s% tEXTI初始化结构体/ @" W9 @( G% z% p0 T" w
+ \' d! N$ |1 ^0 h2 q2 o- /** & r9 X4 P' }3 p' @( n" H' s
- * @brief EXTI Init Structure definition
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- typedef struct5 p: z- i. b- T9 E) E7 N+ Z5 k
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- uint32_t EXTI_Line; /*!< Specifies the EXTI lines to be enabled or disabled.1 d, @: W' |/ s# D# Q! J- z7 n; j
- This parameter can be any combination value of @ref EXTI_Lines */4 x" \8 z, D7 [/ Q1 ^9 A4 |
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- EXTIMode_TypeDef EXTI_Mode; /*!< Specifies the mode for the EXTI lines.
) X2 f" g* _8 K0 W" l0 }: N6 y; s+ ?2 N - This parameter can be a value of @ref EXTIMode_TypeDef */
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- EXTITrigger_TypeDef EXTI_Trigger; /*!< Specifies the trigger signal active edge for the EXTI lines.) K" M' M) D7 r. W
- This parameter can be a value of @ref EXTITrigger_TypeDef */
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- FunctionalState EXTI_LineCmd; /*!< Specifies the new state of the selected EXTI lines.
5 V! i) ?9 E) u3 b- @ - This parameter can be set either to ENABLE or DISABLE */ & k0 O1 Y4 Q! L+ K( B
- }EXTI_InitTypeDef;* K0 y" K$ _, T" |3 O/ @
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& V+ W" b" ]8 E) P) o3 }外部中断线
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- }# _' m1 k; S8 m- /** @defgroup EXTI_Lines # f$ ~6 M/ ^7 w. {( l* h2 G) y
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- */
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9 Z8 Q+ V8 y6 X5 O- #define EXTI_Line0 ((uint32_t)0x00001) /*!< External interrupt line 0 */" O0 P7 R8 g. J5 F
- #define EXTI_Line1 ((uint32_t)0x00002) /*!< External interrupt line 1 */
, K/ o/ V3 B8 ?5 q2 V - #define EXTI_Line2 ((uint32_t)0x00004) /*!< External interrupt line 2 */
$ s/ k% X+ i6 [4 T$ O - #define EXTI_Line3 ((uint32_t)0x00008) /*!< External interrupt line 3 */
$ G* G! W+ U+ ~+ h9 I1 X9 J - #define EXTI_Line4 ((uint32_t)0x00010) /*!< External interrupt line 4 */
; j. Q; N5 @$ A - #define EXTI_Line5 ((uint32_t)0x00020) /*!< External interrupt line 5 */8 V/ [% L$ ~5 [, y* o0 ]6 ]
- #define EXTI_Line6 ((uint32_t)0x00040) /*!< External interrupt line 6 */9 J- [( ^3 w1 T: \5 k9 S, M
- #define EXTI_Line7 ((uint32_t)0x00080) /*!< External interrupt line 7 */
2 t5 l; A" z8 R9 l9 ? - #define EXTI_Line8 ((uint32_t)0x00100) /*!< External interrupt line 8 */9 J C+ C7 X9 n/ u
- #define EXTI_Line9 ((uint32_t)0x00200) /*!< External interrupt line 9 */1 _0 ~ X8 D- _% {. i8 Z
- #define EXTI_Line10 ((uint32_t)0x00400) /*!< External interrupt line 10 */
; }6 A. z# b6 x( a5 d& q - #define EXTI_Line11 ((uint32_t)0x00800) /*!< External interrupt line 11 */
1 p3 M0 [+ T' } - #define EXTI_Line12 ((uint32_t)0x01000) /*!< External interrupt line 12 */# n0 B0 B) J8 C7 o+ V, K3 m
- #define EXTI_Line13 ((uint32_t)0x02000) /*!< External interrupt line 13 */9 U5 i( q) o# ]3 q: [
- #define EXTI_Line14 ((uint32_t)0x04000) /*!< External interrupt line 14 *// ]9 M/ |' E( U9 y2 h: @
- #define EXTI_Line15 ((uint32_t)0x08000) /*!< External interrupt line 15 */* O$ J- o, F8 ~, [. [$ w/ E7 y1 d8 ]
- #define EXTI_Line16 ((uint32_t)0x10000) /*!< External interrupt line 16 Connected to the$ o$ Y1 W, r% t2 x9 {3 n3 [
- PVD Output */) f1 M- H$ Y/ s8 B; l
- #define EXTI_Line17 ((uint32_t)0x20000) /*!< External interrupt line 17 Connected to the( K- s" G& u) N0 ^1 p, ~1 d" y
- RTC Alarm event */# Y% @/ Q* n7 L
- #define EXTI_Line18 ((uint32_t)0x40000) /*!< External interrupt line 18 Connected to the5 ]" V" }$ b2 U0 b; j6 V) \% K
- USB OTG FS Wakeup from suspend event */
1 k4 p3 a3 S: R0 K% @8 @/ t - #define EXTI_Line19 ((uint32_t)0x80000) /*!< External interrupt line 19 Connected to the
: @/ z; R" S: n' p, e' M7 T% A p - Ethernet Wakeup event */
' o; e1 G' c: P% l# g4 j - #define EXTI_Line20 ((uint32_t)0x00100000) /*!< External interrupt line 20 Connected to the! H, u# w# E1 H) D; C) F
- USB OTG HS (configured in FS) Wakeup event */3 Z' A- |" N# E( L
- #define EXTI_Line21 ((uint32_t)0x00200000) /*!< External interrupt line 21 Connected to the
0 m" D8 K7 b9 a4 J5 W, M - RTC Tamper and Time Stamp events */ # V. V% f( T0 l9 T
- #define EXTI_Line22 ((uint32_t)0x00400000) /*!< External interrupt line 22 Connected to the; r8 f, A! z" s; `; r/ K
- RTC Wakeup event */
2 m( \/ I1 ~) `) z; T5 j( Q6 [ - #define EXTI_Line23 ((uint32_t)0x00800000) /*!< External interrupt line 23 Connected to the 8 k8 I; F! }6 `' o C+ p
- LPTIM Wakeup event */
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1 P t" u6 T, h6 S- #define IS_EXTI_LINE(LINE) ((((LINE) & (uint32_t)0xFF800000) == 0x00) && ((LINE) != (uint16_t)0x00))# w8 ^, \3 J) y3 v1 |
( F7 z$ x, v+ ~7 Z8 t/ s5 [- #define IS_GET_EXTI_LINE(LINE) (((LINE) == EXTI_Line0) || ((LINE) == EXTI_Line1) || \
9 a5 }+ V: w- W7 E. s - ((LINE) == EXTI_Line2) || ((LINE) == EXTI_Line3) || \
8 i( [4 k% B% e6 ~$ r2 T) w* f - ((LINE) == EXTI_Line4) || ((LINE) == EXTI_Line5) || \
; E1 p# S4 O7 n8 i5 H - ((LINE) == EXTI_Line6) || ((LINE) == EXTI_Line7) || \1 k- M: c- a$ [/ s& ~
- ((LINE) == EXTI_Line8) || ((LINE) == EXTI_Line9) || \
8 Y! I7 e0 L3 g+ h5 M; C- |+ M. _ - ((LINE) == EXTI_Line10) || ((LINE) == EXTI_Line11) || \3 G8 O2 n/ R0 p3 h" c( u
- ((LINE) == EXTI_Line12) || ((LINE) == EXTI_Line13) || \1 G: ?( M* [7 X( e! [3 N) t( f
- ((LINE) == EXTI_Line14) || ((LINE) == EXTI_Line15) || \
5 @! E/ T8 B" J; _ - ((LINE) == EXTI_Line16) || ((LINE) == EXTI_Line17) || \
: h) v, d+ {/ i+ q - ((LINE) == EXTI_Line18) || ((LINE) == EXTI_Line19) || \
# A' ~+ I- s* X9 f: C; @ - ((LINE) == EXTI_Line20) || ((LINE) == EXTI_Line21) ||\
, z# [5 h$ S7 ~4 k% r - ((LINE) == EXTI_Line22) || ((LINE) == EXTI_Line23))
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03. 相关函数% {) u1 P" j9 q, @
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- /* Exported macro ------------------------------------------------------------*/( I2 r2 k. V6 _' s
- /* Exported functions --------------------------------------------------------*/2 o+ g7 E3 g Q' ^6 L
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- /* Function used to set the EXTI configuration to the default reset state *****/$ x" D; k- ?) m0 u6 P( x0 `4 ?
- void EXTI_DeInit(void);
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2 ?8 }, t% T3 @' {+ H- /* Initialization and Configuration functions *********************************/
& b( t8 T3 Z5 r$ [& V - void EXTI_Init(EXTI_InitTypeDef* EXTI_InitStruct);
$ w5 ]& j+ ] P - void EXTI_StructInit(EXTI_InitTypeDef* EXTI_InitStruct);, K: S( t7 a' a& `9 E$ o1 h
- void EXTI_GenerateSWInterrupt(uint32_t EXTI_Line);" K, d& l! V M0 P* |2 I
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- /* Interrupts and flags management functions **********************************/; v& J) _* i; A* {: C
- FlagStatus EXTI_GetFlagStatus(uint32_t EXTI_Line);6 t5 ?' i3 i8 a n9 W9 r
- void EXTI_ClearFlag(uint32_t EXTI_Line);
0 F$ t, t, t2 J) [; ^ - ITStatus EXTI_GetITStatus(uint32_t EXTI_Line);5 C& N8 s- }0 T2 \
- void EXTI_ClearITPendingBit(uint32_t EXTI_Line);9 A. l( B3 f! c0 s4 G k1 x
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