01. 概述
, `3 V' x5 K7 E( u8 e6 d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。
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/ [ }: M) E% h! b02. 相关类型
3 [ f: t F2 t5 ]EXTI模式枚举- /** ! r& I/ n: i+ k' \( V) f
- * @brief EXTI mode enumeration
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. W7 a( O) S; C- typedef enum
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- EXTI_Mode_Interrupt = 0x00,2 \3 \ z6 k5 I- r
- EXTI_Mode_Event = 0x04$ Z3 D7 Q- J5 T' Z7 Z7 ]4 k. d- g
- }EXTIMode_TypeDef;
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q0 Q' T; C! a- #define IS_EXTI_MODE(MODE) (((MODE) == EXTI_Mode_Interrupt) || ((MODE) == EXTI_Mode_Event))% P3 D9 g* U- r
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$ i7 \$ R* R* n* ], D0 BEXTI触发枚举2 C0 P2 q2 n# Q6 i! I
- /**
( E- ~- C5 C& W6 D: r - * @brief EXTI Trigger enumeration
8 L V1 M, v6 ^, x) e - */
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( D3 h9 r' B' k- typedef enum
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- EXTI_Trigger_Rising = 0x08, //上升沿
7 |- H3 v3 D. u# g l6 A - EXTI_Trigger_Falling = 0x0C, //下降沿
- i% m6 p& X# H N; K - EXTI_Trigger_Rising_Falling = 0x10 //边沿触发: V" s6 [; N! x2 H
- }EXTITrigger_TypeDef;; c& H- k2 v, ~
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- #define IS_EXTI_TRIGGER(TRIGGER) (((TRIGGER) == EXTI_Trigger_Rising) || \
, `7 R z, x5 j; z! k) V - ((TRIGGER) == EXTI_Trigger_Falling) || \! Z+ W- f" f# w6 n' b
- ((TRIGGER) == EXTI_Trigger_Rising_Falling)) q: U: o% H9 ?3 l6 W% ]# P' s- k
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EXTI初始化结构体1 ^3 \) i% s" n, {7 ~3 o" l- ^& _
- /** - I) P% f' ~5 a. ^( v
- * @brief EXTI Init Structure definition
3 V @+ S; D( F( e3 ? - */
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+ m9 q0 S$ I) Y! S6 p! H# Z& V. z- typedef struct+ ~8 Z y# C6 \% b
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- uint32_t EXTI_Line; /*!< Specifies the EXTI lines to be enabled or disabled.- z c, P3 F+ P
- This parameter can be any combination value of @ref EXTI_Lines */* \$ X" o( J% x7 @7 a
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- EXTIMode_TypeDef EXTI_Mode; /*!< Specifies the mode for the EXTI lines.$ f5 H& t( I) x
- This parameter can be a value of @ref EXTIMode_TypeDef */" ?& U9 r! R0 _' c4 e5 V
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- EXTITrigger_TypeDef EXTI_Trigger; /*!< Specifies the trigger signal active edge for the EXTI lines.
1 _$ q& e5 E0 E$ A1 L" ?3 C1 @ - This parameter can be a value of @ref EXTITrigger_TypeDef */
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4 V% Y" h+ Z2 h5 l! x- FunctionalState EXTI_LineCmd; /*!< Specifies the new state of the selected EXTI lines.2 e% m9 y' R: } f4 u) @9 R- o- k
- This parameter can be set either to ENABLE or DISABLE */
7 p9 N% F0 h8 k, ^3 e* I( v" j% i - }EXTI_InitTypeDef;
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- /** @defgroup EXTI_Lines % F4 Z* h3 h* Y+ Z: I
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- */
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$ v ?$ Y0 X7 N/ S6 |5 u: X- #define EXTI_Line0 ((uint32_t)0x00001) /*!< External interrupt line 0 */
. X: }8 W# {* _; J. A. |8 N8 n1 n9 t - #define EXTI_Line1 ((uint32_t)0x00002) /*!< External interrupt line 1 */$ u# r0 x! C8 a/ q, n+ |2 G
- #define EXTI_Line2 ((uint32_t)0x00004) /*!< External interrupt line 2 */
6 q8 c0 W, K( R( _& }, h - #define EXTI_Line3 ((uint32_t)0x00008) /*!< External interrupt line 3 */. r+ S# p. g0 M* V; }3 ]+ \& B
- #define EXTI_Line4 ((uint32_t)0x00010) /*!< External interrupt line 4 */
5 H) \1 b( S1 C3 U" j - #define EXTI_Line5 ((uint32_t)0x00020) /*!< External interrupt line 5 */, b. L$ O1 H7 S! P- P; b! }4 @$ o
- #define EXTI_Line6 ((uint32_t)0x00040) /*!< External interrupt line 6 */: L/ J, K5 O' g6 `+ C" T" f5 H
- #define EXTI_Line7 ((uint32_t)0x00080) /*!< External interrupt line 7 */
; j5 k& i) B7 [3 ] - #define EXTI_Line8 ((uint32_t)0x00100) /*!< External interrupt line 8 */
! ~8 p3 p: H. ^* P q9 _ - #define EXTI_Line9 ((uint32_t)0x00200) /*!< External interrupt line 9 */
% J: B5 x. M, e+ z8 P% N) k1 p - #define EXTI_Line10 ((uint32_t)0x00400) /*!< External interrupt line 10 */8 e: r7 N: b r# w/ t3 L) P
- #define EXTI_Line11 ((uint32_t)0x00800) /*!< External interrupt line 11 */% P3 B( r9 U/ F, t& c
- #define EXTI_Line12 ((uint32_t)0x01000) /*!< External interrupt line 12 */
' i8 n/ b9 V$ O5 a/ U% N1 v j& x5 p - #define EXTI_Line13 ((uint32_t)0x02000) /*!< External interrupt line 13 */
( M8 {7 f% O7 |8 m7 p. i - #define EXTI_Line14 ((uint32_t)0x04000) /*!< External interrupt line 14 */
. L/ `: w3 T+ e: k; j - #define EXTI_Line15 ((uint32_t)0x08000) /*!< External interrupt line 15 */
+ R6 j. q1 C: S4 W, C2 C. B9 R ~ - #define EXTI_Line16 ((uint32_t)0x10000) /*!< External interrupt line 16 Connected to the. u3 ~+ K, Q; H# N. o
- PVD Output */
1 ^7 P- O0 O! i7 o9 f7 Z4 I - #define EXTI_Line17 ((uint32_t)0x20000) /*!< External interrupt line 17 Connected to the
Q3 ^3 [+ Z- c$ z9 K% b5 i/ Y: L - RTC Alarm event */
9 K' S/ n7 g- t: c7 D - #define EXTI_Line18 ((uint32_t)0x40000) /*!< External interrupt line 18 Connected to the7 l P6 a: x0 o7 L
- USB OTG FS Wakeup from suspend event */
V7 p. c# \8 z2 Y9 v c5 y3 d0 p - #define EXTI_Line19 ((uint32_t)0x80000) /*!< External interrupt line 19 Connected to the7 K8 P" ]: S1 k1 G$ r; _1 a
- Ethernet Wakeup event */. W" Z6 P3 U' n7 D
- #define EXTI_Line20 ((uint32_t)0x00100000) /*!< External interrupt line 20 Connected to the
( e) b9 I! d/ f - USB OTG HS (configured in FS) Wakeup event */ b2 P) E( I; M* d
- #define EXTI_Line21 ((uint32_t)0x00200000) /*!< External interrupt line 21 Connected to the : H2 w; ~' y1 f5 @
- RTC Tamper and Time Stamp events */ ) i/ i4 G ^5 A
- #define EXTI_Line22 ((uint32_t)0x00400000) /*!< External interrupt line 22 Connected to the- q( ?& C; R' R! O* o5 F* x
- RTC Wakeup event */ p8 k# v0 i/ {2 H
- #define EXTI_Line23 ((uint32_t)0x00800000) /*!< External interrupt line 23 Connected to the
2 _' K: H; d4 c3 l( R - LPTIM Wakeup event */% f6 A% i" W: \" x7 P% `# o, D/ m
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-
2 W5 ?; z2 ~7 @7 U8 z; F2 P6 g" M - #define IS_EXTI_LINE(LINE) ((((LINE) & (uint32_t)0xFF800000) == 0x00) && ((LINE) != (uint16_t)0x00))
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* l& R3 f' g) o* [! w( O- #define IS_GET_EXTI_LINE(LINE) (((LINE) == EXTI_Line0) || ((LINE) == EXTI_Line1) || \
- d$ O! ~9 R5 @8 q, p: @ - ((LINE) == EXTI_Line2) || ((LINE) == EXTI_Line3) || \) `* Z, a% p" t0 b% Y
- ((LINE) == EXTI_Line4) || ((LINE) == EXTI_Line5) || \
* h' s7 c1 D4 m- ^; X4 p2 e - ((LINE) == EXTI_Line6) || ((LINE) == EXTI_Line7) || \4 U% V8 x: f+ U+ G# ?$ W0 P
- ((LINE) == EXTI_Line8) || ((LINE) == EXTI_Line9) || \6 v4 i1 I: P& b" d# _$ @
- ((LINE) == EXTI_Line10) || ((LINE) == EXTI_Line11) || \
" z2 v1 ^5 v2 f7 H - ((LINE) == EXTI_Line12) || ((LINE) == EXTI_Line13) || \
) K- x6 j9 P* A: N2 R6 _+ n0 W - ((LINE) == EXTI_Line14) || ((LINE) == EXTI_Line15) || \
- P. Q, @+ e* S: Q6 a - ((LINE) == EXTI_Line16) || ((LINE) == EXTI_Line17) || \- u, P# s% j( D9 q' T7 h: L
- ((LINE) == EXTI_Line18) || ((LINE) == EXTI_Line19) || \& C8 E, {/ h5 L
- ((LINE) == EXTI_Line20) || ((LINE) == EXTI_Line21) ||\) `8 y9 q. |# D% Y8 K$ H
- ((LINE) == EXTI_Line22) || ((LINE) == EXTI_Line23))& h9 [) a3 H' C
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03. 相关函数 x2 q# u0 x, U' U3 \ d
- /* Exported macro ------------------------------------------------------------*/
$ j: {$ C- A5 E' N) o7 I6 X - /* Exported functions --------------------------------------------------------*// ]5 T& y: p# C
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- /* Function used to set the EXTI configuration to the default reset state *****/& X, ]4 Y4 K+ @2 K* y, J
- void EXTI_DeInit(void);
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- /* Initialization and Configuration functions *********************************/
3 p* h9 w3 ?( I" p - void EXTI_Init(EXTI_InitTypeDef* EXTI_InitStruct);
8 Y. t' C4 _# w - void EXTI_StructInit(EXTI_InitTypeDef* EXTI_InitStruct);$ T2 y8 X6 G" Q2 F
- void EXTI_GenerateSWInterrupt(uint32_t EXTI_Line);* c2 c; a& C( ~" V
3 S& J' X0 _' Y7 \, w, b2 Z" {; x- /* Interrupts and flags management functions **********************************/
) |9 G- p6 Z' [8 }5 E0 X - FlagStatus EXTI_GetFlagStatus(uint32_t EXTI_Line);
& ]7 S8 M- | e2 q: F, _ o- Z - void EXTI_ClearFlag(uint32_t EXTI_Line);
5 j( b5 Z2 `* K5 O. c - ITStatus EXTI_GetITStatus(uint32_t EXTI_Line);
5 m: e- u9 j, i3 J6 r - void EXTI_ClearITPendingBit(uint32_t EXTI_Line);
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