01. 概述6 [- _6 e& a1 O ]$ j; p2 d9 ~! ~
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。6 _- U, F7 L* |) q
4 u7 x0 _' S! j7 H$ @0 c2 r02. 相关类型$ l+ A4 w/ U3 v. c5 f
EXTI模式枚举- /**
: ?2 Y; N2 t9 N1 x" r - * @brief EXTI mode enumeration
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- typedef enum* q8 ]# |& K; J3 v
- {
3 v k( Y- s8 B0 I- P! b \7 X - EXTI_Mode_Interrupt = 0x00,5 a# o1 ?; j5 { R- B+ w( I
- EXTI_Mode_Event = 0x048 ]& i( L- {& U* R% d
- }EXTIMode_TypeDef;& D$ c3 I& z2 h3 O3 ^, e
/ |/ B) i& [( ^/ T' ~- |0 J- #define IS_EXTI_MODE(MODE) (((MODE) == EXTI_Mode_Interrupt) || ((MODE) == EXTI_Mode_Event))2 M& j- F, E, z% f) C
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* L2 B3 t+ e+ V1 M. E0 D1 \EXTI触发枚举& ?; M1 W4 f3 I
- /** ; ~6 y" f* [# K
- * @brief EXTI Trigger enumeration
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/ z4 s, q2 J5 F- typedef enum
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0 q$ Q1 B6 j1 d" c L& l: g5 | - EXTI_Trigger_Rising = 0x08, //上升沿
8 ]* N5 l/ c1 |; L& X- L: A - EXTI_Trigger_Falling = 0x0C, //下降沿
7 k$ n: H, J9 E3 f8 O, I/ B5 z* W- [ - EXTI_Trigger_Rising_Falling = 0x10 //边沿触发7 b }7 N- o8 g! m
- }EXTITrigger_TypeDef;9 _$ v) P, }2 v1 o9 ^. m: g
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- #define IS_EXTI_TRIGGER(TRIGGER) (((TRIGGER) == EXTI_Trigger_Rising) || \
; k' M$ k: Z+ k) b% R2 J - ((TRIGGER) == EXTI_Trigger_Falling) || \
, v1 S; I# Y1 {: ~9 s& w+ ? - ((TRIGGER) == EXTI_Trigger_Rising_Falling))
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+ S" X6 o5 t: Z. q! l; U4 G9 jEXTI初始化结构体5 X* Y0 I% y2 F9 c
- /**
: ~5 O( z" R. o) I3 ~* M: z j# R - * @brief EXTI Init Structure definition / B W" l/ _6 B# y }5 i8 R& f
- */
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- typedef struct/ m9 K5 \; K3 O* A+ J8 Q4 G) R
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- uint32_t EXTI_Line; /*!< Specifies the EXTI lines to be enabled or disabled.4 S4 i, y9 L# q$ L! x* N& N. U
- This parameter can be any combination value of @ref EXTI_Lines */
; @$ b3 `: p4 I+ f9 R -
7 B8 B+ F. U0 J4 g% [9 w5 U1 }6 f) N - EXTIMode_TypeDef EXTI_Mode; /*!< Specifies the mode for the EXTI lines.: e0 s" B" S1 A
- 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." W0 z* M! T; E: q% l% D
- This parameter can be a value of @ref EXTITrigger_TypeDef */
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2 Q$ y! o4 n/ Z7 o9 V& P- FunctionalState EXTI_LineCmd; /*!< Specifies the new state of the selected EXTI lines.; u) c. t3 {% J5 u5 S
- This parameter can be set either to ENABLE or DISABLE */ # Z* U( W1 g& `) ]( \( t; A" w
- }EXTI_InitTypeDef;
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外部中断线
4 g4 Z; J- Z- R- /** @defgroup EXTI_Lines ; }) Z4 L4 h7 O7 s W
- * @{
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- #define EXTI_Line0 ((uint32_t)0x00001) /*!< External interrupt line 0 */
9 l* q: m+ l" l - #define EXTI_Line1 ((uint32_t)0x00002) /*!< External interrupt line 1 */: J! d6 V- M* R, J: |6 R- g! e
- #define EXTI_Line2 ((uint32_t)0x00004) /*!< External interrupt line 2 */1 g/ {, t* h9 S& |( D- `7 @
- #define EXTI_Line3 ((uint32_t)0x00008) /*!< External interrupt line 3 */
7 |: L+ F; U* n% G - #define EXTI_Line4 ((uint32_t)0x00010) /*!< External interrupt line 4 */$ i' F# h9 C. {, j Q2 Y, P5 H
- #define EXTI_Line5 ((uint32_t)0x00020) /*!< External interrupt line 5 */8 ^! L3 s, k6 N( J% S" k6 `1 W( l
- #define EXTI_Line6 ((uint32_t)0x00040) /*!< External interrupt line 6 */# x" Z8 i( h; X9 A' R
- #define EXTI_Line7 ((uint32_t)0x00080) /*!< External interrupt line 7 */
- J5 r$ p3 Q% Q; T$ ` - #define EXTI_Line8 ((uint32_t)0x00100) /*!< External interrupt line 8 */
: i: r) Z& `- m/ D0 A - #define EXTI_Line9 ((uint32_t)0x00200) /*!< External interrupt line 9 */
$ J0 L* p: w, S/ R; H% q6 S - #define EXTI_Line10 ((uint32_t)0x00400) /*!< External interrupt line 10 */2 E& [: A) b0 }. K! F s1 e1 P( m, ^
- #define EXTI_Line11 ((uint32_t)0x00800) /*!< External interrupt line 11 */1 y `2 Y4 U5 ~7 f m
- #define EXTI_Line12 ((uint32_t)0x01000) /*!< External interrupt line 12 */1 R) i7 R2 N1 Z6 `# D" H9 ^
- #define EXTI_Line13 ((uint32_t)0x02000) /*!< External interrupt line 13 */
# V6 Z6 S b+ o' g! }! B4 e9 ] - #define EXTI_Line14 ((uint32_t)0x04000) /*!< External interrupt line 14 */$ s; O+ V/ ]* A1 x- d
- #define EXTI_Line15 ((uint32_t)0x08000) /*!< External interrupt line 15 */ i7 n [+ d3 m, B0 ]% O
- #define EXTI_Line16 ((uint32_t)0x10000) /*!< External interrupt line 16 Connected to the
( d% Q& m z% r, [ - PVD Output */
) e2 s" u6 d9 s9 X/ O$ a9 b+ _ - #define EXTI_Line17 ((uint32_t)0x20000) /*!< External interrupt line 17 Connected to the6 A L* q, y( N4 `* M' D
- RTC Alarm event */* y* c& D6 l: a. f! U. v, v
- #define EXTI_Line18 ((uint32_t)0x40000) /*!< External interrupt line 18 Connected to the- C; e5 O5 l" N! }6 |+ E X
- USB OTG FS Wakeup from suspend event */ * w- e5 u% l1 [/ v- C$ B4 ^8 V
- #define EXTI_Line19 ((uint32_t)0x80000) /*!< External interrupt line 19 Connected to the
, R1 F/ G9 p) Z - Ethernet Wakeup event */
+ h: f4 ^2 g/ b1 n: y7 i - #define EXTI_Line20 ((uint32_t)0x00100000) /*!< External interrupt line 20 Connected to the
$ `3 C: k0 {& V# w2 M1 ` - USB OTG HS (configured in FS) Wakeup event */
( e& r- K: D. b9 @* o5 } - #define EXTI_Line21 ((uint32_t)0x00200000) /*!< External interrupt line 21 Connected to the
; z7 a8 C+ S7 m3 o - RTC Tamper and Time Stamp events */ ! E0 v: q% \: c. b4 [
- #define EXTI_Line22 ((uint32_t)0x00400000) /*!< External interrupt line 22 Connected to the
) ~5 b9 X) ^( d7 J! U, X* @ - RTC Wakeup event */
, @& R% i7 k8 o6 ?! f: B - #define EXTI_Line23 ((uint32_t)0x00800000) /*!< External interrupt line 23 Connected to the
1 @# j2 m0 x+ Q6 Q3 J: V5 G - LPTIM Wakeup event */' P3 }3 K3 W" n
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- #define IS_EXTI_LINE(LINE) ((((LINE) & (uint32_t)0xFF800000) == 0x00) && ((LINE) != (uint16_t)0x00))
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- #define IS_GET_EXTI_LINE(LINE) (((LINE) == EXTI_Line0) || ((LINE) == EXTI_Line1) || \
( _( o/ j, g$ _2 y2 c, {2 B e1 B - ((LINE) == EXTI_Line2) || ((LINE) == EXTI_Line3) || \
& }5 |7 s0 \% f' @: e; _, M# f5 t9 L - ((LINE) == EXTI_Line4) || ((LINE) == EXTI_Line5) || \
+ {3 j7 i1 ]$ \1 v( U( c - ((LINE) == EXTI_Line6) || ((LINE) == EXTI_Line7) || \& W! I7 S" {: [0 J; ?% x
- ((LINE) == EXTI_Line8) || ((LINE) == EXTI_Line9) || \
8 E* e2 R. k X1 U' a8 G - ((LINE) == EXTI_Line10) || ((LINE) == EXTI_Line11) || \
% |' x" S2 u* M. s6 b* Z/ j2 K- y5 v - ((LINE) == EXTI_Line12) || ((LINE) == EXTI_Line13) || \3 X0 z' U/ G; G. A$ y' t/ n$ {
- ((LINE) == EXTI_Line14) || ((LINE) == EXTI_Line15) || \
. a2 `/ @: `# Z+ e - ((LINE) == EXTI_Line16) || ((LINE) == EXTI_Line17) || \
# f4 {& u" X3 }, a$ } - ((LINE) == EXTI_Line18) || ((LINE) == EXTI_Line19) || \
8 ^. H- R6 J5 J. q& u2 ~6 V# C - ((LINE) == EXTI_Line20) || ((LINE) == EXTI_Line21) ||\( U1 R% d# |/ |" L) r R
- ((LINE) == EXTI_Line22) || ((LINE) == EXTI_Line23))
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03. 相关函数
) G3 o! f: P/ I) e6 q% l$ F& O- /* Exported macro ------------------------------------------------------------*/$ j. T7 p: Z& {0 J8 q+ M* x
- /* Exported functions --------------------------------------------------------*/. s q4 _2 F9 [; m! P
. z- s& r6 q, j" Z( O( R- /* Function used to set the EXTI configuration to the default reset state *****/: i; E( \3 z+ M% E2 z. j' U/ A
- void EXTI_DeInit(void);3 J' O# ?" Q1 l) f
% ~: `% Q: s6 q( [' N- /* Initialization and Configuration functions *********************************/
8 S# ]# T3 i+ Y2 ?- k - void EXTI_Init(EXTI_InitTypeDef* EXTI_InitStruct);/ J1 q: i2 x: y7 u& c; U9 _7 u: \
- void EXTI_StructInit(EXTI_InitTypeDef* EXTI_InitStruct);
3 H, a. f) Y- s' ^) D - void EXTI_GenerateSWInterrupt(uint32_t EXTI_Line);* x4 d2 v$ C+ Z) {6 r/ s
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- /* Interrupts and flags management functions **********************************/8 q d. l# P* l6 C: [
- FlagStatus EXTI_GetFlagStatus(uint32_t EXTI_Line);
7 o5 o5 v1 S2 L* A8 w( G0 C/ K$ F- Y5 N - void EXTI_ClearFlag(uint32_t EXTI_Line);0 R" _ _& O, @" {0 h" B
- ITStatus EXTI_GetITStatus(uint32_t EXTI_Line);( E6 e* X |+ s3 P7 v
- void EXTI_ClearITPendingBit(uint32_t EXTI_Line);# n3 V6 A4 N; ?9 W3 ]
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