01. 概述
. j- r6 b, `( M2 q* l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。
' r" F+ O% K/ i0 V1 S f2 \, G# ~: z
02. 相关类型
a! b1 W+ }! XEXTI模式枚举+ C2 R6 d) G% h( u
8 a+ g6 o4 ~: H9 p$ K( ^5 F- /** 6 c( g, C) {! J" E+ p
- * @brief EXTI mode enumeration
2 g) \" b+ q% S; ]- y - */
" r. t1 m. q% }& A- H2 u
; \8 n$ p1 n D( w+ _2 F- typedef enum. N$ O: z' `, |& P, H
- {
: M' v0 ?; `6 I$ p( M' y6 q3 ? - EXTI_Mode_Interrupt = 0x00,0 B6 l8 a4 g- j$ W) C5 p: A0 \4 P
- EXTI_Mode_Event = 0x04
, F4 R2 r& B4 F* N+ h1 v - }EXTIMode_TypeDef;+ M9 O) ?* Z# a6 m/ n/ c+ A- f
" f+ \- [5 x: a8 H4 F- #define IS_EXTI_MODE(MODE) (((MODE) == EXTI_Mode_Interrupt) || ((MODE) == EXTI_Mode_Event))
复制代码 ' q ~; l9 r. g6 W' [
EXTI触发枚举- /**
! P0 _' B$ J1 O; |/ N! J# V U - * @brief EXTI Trigger enumeration
0 g4 \" d' K) p& K1 w& C - */: g2 S6 b/ l5 K$ H
4 ^9 b H d- i- typedef enum
( E8 \) e/ N" k: |+ Z - {
7 ^! o3 m) U* c+ V - EXTI_Trigger_Rising = 0x08, //上升沿
' F! A+ s/ O" p& Z8 r - EXTI_Trigger_Falling = 0x0C, //下降沿
& R, \; e. ^! b) j( k5 s - EXTI_Trigger_Rising_Falling = 0x10 //边沿触发4 L8 I, c% X9 L8 Q+ H$ p: `& J7 C
- }EXTITrigger_TypeDef;
& P; m9 s5 z% s, M7 @; g
: ~2 _1 o7 Y: i& N- j/ u' q+ t- #define IS_EXTI_TRIGGER(TRIGGER) (((TRIGGER) == EXTI_Trigger_Rising) || \
8 a& @) F+ @1 x6 \. I3 [! l - ((TRIGGER) == EXTI_Trigger_Falling) || \, |, q% T d0 I& f
- ((TRIGGER) == EXTI_Trigger_Rising_Falling))
复制代码
' W+ t1 F: D' ~0 h5 e9 eEXTI初始化结构体) T9 o) \; y' g8 x6 y/ H, ?
+ o8 N" |1 b: z$ U' B- /**
* j$ c+ m9 P0 F* d) C - * @brief EXTI Init Structure definition
/ N: q( f F( Y3 l - */5 w0 g: Q5 R8 b1 g1 ~& W# B% a% w# a" Z/ d
- 0 r) ^/ L2 L( J" M5 w3 D
- typedef struct/ G I. b3 W& H1 K
- {
& t- R* S) K u! B2 f! O0 P5 f - uint32_t EXTI_Line; /*!< Specifies the EXTI lines to be enabled or disabled.2 Y, K8 p* k/ | _" h8 L
- This parameter can be any combination value of @ref EXTI_Lines */
0 c0 u+ |. K5 m& H2 n4 { - + n! V# `1 }( m" {$ ?3 _
- EXTIMode_TypeDef EXTI_Mode; /*!< Specifies the mode for the EXTI lines.# J/ i0 o! M- ?9 I
- This parameter can be a value of @ref EXTIMode_TypeDef */
0 m8 j. y3 r7 P
4 L$ n) J# c+ N" [- EXTITrigger_TypeDef EXTI_Trigger; /*!< Specifies the trigger signal active edge for the EXTI lines.* x0 ], a- b9 t) Y% e4 i
- This parameter can be a value of @ref EXTITrigger_TypeDef */
" R# s6 u. V! n- [
% n6 T$ a" c! d5 S8 G7 S- FunctionalState EXTI_LineCmd; /*!< Specifies the new state of the selected EXTI lines.# N- \% ^2 i H
- This parameter can be set either to ENABLE or DISABLE */ ! G, T' v1 Y- {' f$ c" A
- }EXTI_InitTypeDef;# N% v$ D/ b( K( w
复制代码 5 W4 f; @5 B& v9 V1 W
外部中断线; a, f. o K9 H% s
5 c$ n/ l8 z+ }0 N1 b1 s6 J q- /** @defgroup EXTI_Lines 7 x& I! T9 l! l
- * @{$ n: H- O/ A) v0 e. v' P# z8 v
- *// V& h+ _2 D3 _
- 4 D, u- V- X" o) ~3 W& x H( |& T
- #define EXTI_Line0 ((uint32_t)0x00001) /*!< External interrupt line 0 */3 _! j+ T8 G( g; ^8 U- l
- #define EXTI_Line1 ((uint32_t)0x00002) /*!< External interrupt line 1 */
) d. H( `5 P7 T2 \ - #define EXTI_Line2 ((uint32_t)0x00004) /*!< External interrupt line 2 */
. l- @4 Q# e$ j+ ^7 L( D8 ~. v$ q - #define EXTI_Line3 ((uint32_t)0x00008) /*!< External interrupt line 3 */& D3 y Z4 V! u$ r, m7 i: O1 r
- #define EXTI_Line4 ((uint32_t)0x00010) /*!< External interrupt line 4 */7 i1 Q% h( H( ?+ f6 w( w2 N
- #define EXTI_Line5 ((uint32_t)0x00020) /*!< External interrupt line 5 */9 C% m$ E) K% k, {; W& d! C% c
- #define EXTI_Line6 ((uint32_t)0x00040) /*!< External interrupt line 6 */
- y3 `0 K6 i- `3 | - #define EXTI_Line7 ((uint32_t)0x00080) /*!< External interrupt line 7 */9 w; ^+ w. m$ W; v$ m/ N- h' k
- #define EXTI_Line8 ((uint32_t)0x00100) /*!< External interrupt line 8 */
/ R% a- O* X$ b) `3 w" g - #define EXTI_Line9 ((uint32_t)0x00200) /*!< External interrupt line 9 */
0 A* ~( H+ T8 j1 u# q, i' i - #define EXTI_Line10 ((uint32_t)0x00400) /*!< External interrupt line 10 */
, F8 s6 ^- ^5 O" a0 O - #define EXTI_Line11 ((uint32_t)0x00800) /*!< External interrupt line 11 */
3 K( w. ]+ X L& B% g3 q - #define EXTI_Line12 ((uint32_t)0x01000) /*!< External interrupt line 12 */6 ]5 q( |" Y% \: \0 Q" |! Z: }1 [
- #define EXTI_Line13 ((uint32_t)0x02000) /*!< External interrupt line 13 */
( D/ ~% w! n; N- n; h - #define EXTI_Line14 ((uint32_t)0x04000) /*!< External interrupt line 14 */
" q' b, u1 z/ F4 w# r& F - #define EXTI_Line15 ((uint32_t)0x08000) /*!< External interrupt line 15 */! o! u# ]7 i+ _! \. z( W; ~
- #define EXTI_Line16 ((uint32_t)0x10000) /*!< External interrupt line 16 Connected to the PVD Output */
$ F1 R1 f2 Q# y- C - #define EXTI_Line17 ((uint32_t)0x20000) /*!< External interrupt line 17 Connected to the RTC Alarm event */- r6 f, R# W& _( v* s0 v
- #define EXTI_Line18 ((uint32_t)0x40000) /*!< External interrupt line 18 Connected to the USB OTG FS Wakeup from suspend event */
- q: O$ C4 j( B6 t+ ] - #define EXTI_Line19 ((uint32_t)0x80000) /*!< External interrupt line 19 Connected to the Ethernet Wakeup event */
% ]( o/ {" x- V1 I9 I1 ]$ F - #define EXTI_Line20 ((uint32_t)0x00100000) /*!< External interrupt line 20 Connected to the USB OTG HS (configured in FS) Wakeup event */
( ~8 V( r' z+ [" I2 l - #define EXTI_Line21 ((uint32_t)0x00200000) /*!< External interrupt line 21 Connected to the RTC Tamper and Time Stamp events */
0 S& S E( k; f+ a; W2 @ - #define EXTI_Line22 ((uint32_t)0x00400000) /*!< External interrupt line 22 Connected to the RTC Wakeup event */! U( o7 J$ V6 v) }9 X
- #define EXTI_Line23 ((uint32_t)0x00800000) /*!< External interrupt line 23 Connected to the LPTIM Wakeup event */$ i& m( @5 f# W1 g9 X# f
- 0 N8 Z7 `! w1 C& ^8 _+ O8 `2 \
1 H- \( M, s3 t0 d- #define IS_EXTI_LINE(LINE) ((((LINE) & (uint32_t)0xFF800000) == 0x00) && ((LINE) != (uint16_t)0x00))
( I) |/ O, V4 d" u' Y- i
& Q5 p/ l% U0 f+ U. d( d- #define IS_GET_EXTI_LINE(LINE) (((LINE) == EXTI_Line0) || ((LINE) == EXTI_Line1) || \
: I9 z: z9 N5 U8 J# d - ((LINE) == EXTI_Line2) || ((LINE) == EXTI_Line3) || \
. X+ e( G6 D) t9 o# y - ((LINE) == EXTI_Line4) || ((LINE) == EXTI_Line5) || \
) u$ }) O% z* j9 } - ((LINE) == EXTI_Line6) || ((LINE) == EXTI_Line7) || \
1 ^7 ?% w4 i" M8 R5 f - ((LINE) == EXTI_Line8) || ((LINE) == EXTI_Line9) || \! D* i( ?% P* d! r
- ((LINE) == EXTI_Line10) || ((LINE) == EXTI_Line11) || \" J% a' T7 R9 e! l
- ((LINE) == EXTI_Line12) || ((LINE) == EXTI_Line13) || \2 p4 H. N1 G8 W7 ? G
- ((LINE) == EXTI_Line14) || ((LINE) == EXTI_Line15) || \
8 }: V6 i% y# F - ((LINE) == EXTI_Line16) || ((LINE) == EXTI_Line17) || \6 P7 Y+ j: u& k; V
- ((LINE) == EXTI_Line18) || ((LINE) == EXTI_Line19) || \0 [6 \) Y. ]: C; P3 l b5 ]; U; _% X
- ((LINE) == EXTI_Line20) || ((LINE) == EXTI_Line21) ||\& r& s3 k+ T4 g# n4 b' V5 t! F
- ((LINE) == EXTI_Line22) || ((LINE) == EXTI_Line23))
复制代码 1 Q7 c1 w/ i; A" B% K
03. 相关函数
+ a; Y* V$ g2 I: ~+ H/ e& n: f0 g5 u; K. F& w9 Q
- /* Exported macro ------------------------------------------------------------*/
6 Q2 g/ c( V$ w; `0 q9 f/ G - /* Exported functions --------------------------------------------------------*/
7 V& L7 |3 A" c2 q B1 W! T1 H
0 ]9 n- ]+ W: p) w8 h) w1 g- /* Function used to set the EXTI configuration to the default reset state *****/* U( n. L$ Z- C# Z ?
- void EXTI_DeInit(void);
& P# s8 m& A( f: s3 { b# }' l! y
1 e1 f6 w" B' P' Y$ }- /* Initialization and Configuration functions *********************************/
$ L/ \5 ~' w' h! q# U - void EXTI_Init(EXTI_InitTypeDef* EXTI_InitStruct);$ }; T2 `" F$ Z& p
- void EXTI_StructInit(EXTI_InitTypeDef* EXTI_InitStruct);
0 P& \& A5 \+ @8 V2 Y - void EXTI_GenerateSWInterrupt(uint32_t EXTI_Line);
1 Y; p3 f- l1 U; a0 f - 2 i% F) I2 r5 t
- /* Interrupts and flags management functions **********************************/2 \! m1 y f7 F5 k9 l' l
- FlagStatus EXTI_GetFlagStatus(uint32_t EXTI_Line);
y3 |: a+ c4 K - void EXTI_ClearFlag(uint32_t EXTI_Line);$ ]% o7 [" R: B" i. s G
- ITStatus EXTI_GetITStatus(uint32_t EXTI_Line);
+ k( ~/ C B$ w4 ?7 ?2 d - void EXTI_ClearITPendingBit(uint32_t EXTI_Line); r7 x6 P2 }$ M) c4 k' a
复制代码 & ~/ V3 Y8 }4 ]; [4 `
04. 结构体封装* [7 }1 U& u" p7 D) s6 |! e
外部中断控制器结构体封装- /**
2 a* |% a" g. d - * @brief External Interrupt/Event Controller0 r. |: B2 {$ F. y& `( f
- */9 N& Y7 M4 E3 G* Y) q5 I
0 h+ R a+ m0 c R6 v, P+ `5 P7 q- typedef struct/ ]( Q; {: ?- H7 W0 S v, ]
- { X& N8 c7 [! {, }7 l0 b
- __IO uint32_t IMR; /*!< EXTI Interrupt mask register, Address offset: 0x00 */5 t1 F6 b0 i+ U3 g1 f7 M3 w' w: J
- __IO uint32_t EMR; /*!< EXTI Event mask register, Address offset: 0x04 */
. E+ \* ^; ~: _( _ - __IO uint32_t RTSR; /*!< EXTI Rising trigger selection register, Address offset: 0x08 */
8 v j) i' U4 L; L% D% @ - __IO uint32_t FTSR; /*!< EXTI Falling trigger selection register, Address offset: 0x0C */
. y% {3 p# ?+ j - __IO uint32_t SWIER; /*!< EXTI Software interrupt event register, Address offset: 0x10 */7 L" c! f" k: ^
- __IO uint32_t PR; /*!< EXTI Pending register, Address offset: 0x14 */
) ^3 Z1 H9 m- k9 B6 Z9 D" T5 m7 W - } EXTI_TypeDef;
复制代码 : ], v3 n; x% ]8 @. [ m
|