01. 概述
4 g2 Z& M7 H! J1 Y' M' |; s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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2 B7 f# Z) t* @% H: t# J02. 相关类型. D$ b0 U9 ^- P$ T" m! M- f1 L# P1 l
EXTI模式枚举$ ~7 v# L H y4 p* }2 h3 N
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1 H; u8 s, K" VEXTI触发枚举6 c3 I* q6 L1 o" B- Z
$ ]9 |: M A0 k, ]: \; K# L- /**
1 ^8 T8 z" K% C. c6 m( ^ - * @brief EXTI Trigger enumeration " A& _0 h8 C& n6 w" y: ]9 W
- */
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8 s9 H4 D a% g6 \$ b2 w0 H: e/ i- typedef enum- {! \( A, w: \7 D5 {* G& R) A3 H8 A
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- EXTI_Trigger_Rising = 0x08, //上升沿
2 U1 c! u* _4 S( s+ J - EXTI_Trigger_Falling = 0x0C, //下降沿
F- C! P3 @7 M' R4 C - EXTI_Trigger_Rising_Falling = 0x10 //边沿触发
; E+ C8 V. z0 l2 \ F$ Y; ~ - }EXTITrigger_TypeDef;/ N0 P: i6 f' f3 M
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- #define IS_EXTI_TRIGGER(TRIGGER) (((TRIGGER) == EXTI_Trigger_Rising) || \4 o- A+ t9 g. l9 |
- ((TRIGGER) == EXTI_Trigger_Falling) || \8 m% \2 Y0 }, {
- ((TRIGGER) == EXTI_Trigger_Rising_Falling))3 Y# K a3 w$ P* R
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EXTI初始化结构体9 l$ b$ K) J( Q7 e8 R: `( Q
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- /** 8 u/ B- `1 ^0 @ G6 w6 A& j
- * @brief EXTI Init Structure definition 8 a4 R! x4 ~+ h2 \2 X
- */
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- c: f$ O9 a" k% n; ~+ ~1 ~- typedef struct: {7 X; b5 U6 T3 h# |- S# c
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- uint32_t EXTI_Line; /*!< Specifies the EXTI lines to be enabled or disabled.5 o! X$ e+ j" B$ [- V) J
- This parameter can be any combination value of @ref EXTI_Lines */) L) ?2 }: w. _
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- EXTIMode_TypeDef EXTI_Mode; /*!< Specifies the mode for the EXTI lines.( v( p- \# c# v& D3 z
- 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.
W+ z/ N* V" v6 W* |, l n ^2 ] - This parameter can be a value of @ref EXTITrigger_TypeDef */5 @. Y. K% `2 U' n+ ^
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- FunctionalState EXTI_LineCmd; /*!< Specifies the new state of the selected EXTI lines.: m1 u6 g z, p5 K4 u. |% b
- This parameter can be set either to ENABLE or DISABLE */ 1 a& R: h- i1 ]$ X' ^6 s/ [
- }EXTI_InitTypeDef;) K) D% v+ V" ?: E% _
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外部中断线/ f5 a, L2 j4 s0 I: p
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- /** @defgroup EXTI_Lines
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- */
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' w% x% I" M* G- a( Z8 c- #define EXTI_Line0 ((uint32_t)0x00001) /*!< External interrupt line 0 */
, `8 X, e+ S0 n! f - #define EXTI_Line1 ((uint32_t)0x00002) /*!< External interrupt line 1 */
# a; B7 p6 B, ?3 P$ Y5 ]3 J; T( ] W - #define EXTI_Line2 ((uint32_t)0x00004) /*!< External interrupt line 2 */% D2 _% g1 K! i* j
- #define EXTI_Line3 ((uint32_t)0x00008) /*!< External interrupt line 3 */
. K4 I1 g8 v( Z) [ - #define EXTI_Line4 ((uint32_t)0x00010) /*!< External interrupt line 4 */4 f' c# d0 u5 w$ J& _2 S0 g' E2 s
- #define EXTI_Line5 ((uint32_t)0x00020) /*!< External interrupt line 5 */0 L' f2 I1 {6 m/ [- m$ o- m H
- #define EXTI_Line6 ((uint32_t)0x00040) /*!< External interrupt line 6 */
# T+ j* ?# o9 ?$ e5 c - #define EXTI_Line7 ((uint32_t)0x00080) /*!< External interrupt line 7 */
* l; T$ F& e6 X9 e m( ^$ [1 T - #define EXTI_Line8 ((uint32_t)0x00100) /*!< External interrupt line 8 */8 [0 J/ Q8 Y) Z: e! q# x+ O; q5 N
- #define EXTI_Line9 ((uint32_t)0x00200) /*!< External interrupt line 9 */# L( A* K& c, r+ C# W- ~8 z, w
- #define EXTI_Line10 ((uint32_t)0x00400) /*!< External interrupt line 10 */
9 `) M/ W, e% g1 a* e1 g4 M+ r - #define EXTI_Line11 ((uint32_t)0x00800) /*!< External interrupt line 11 */
4 u& _! ?$ ?) } N$ @6 f" T) n& I - #define EXTI_Line12 ((uint32_t)0x01000) /*!< External interrupt line 12 */* b# q5 Z0 W6 d& I, ?% y
- #define EXTI_Line13 ((uint32_t)0x02000) /*!< External interrupt line 13 */
) u7 O0 s5 @# y# P% d/ p* j/ i7 l - #define EXTI_Line14 ((uint32_t)0x04000) /*!< External interrupt line 14 */, L. [; i+ S: ^' B2 y/ M
- #define EXTI_Line15 ((uint32_t)0x08000) /*!< External interrupt line 15 */
' `5 m( J4 I* h9 D: e9 [8 v6 Q, V - #define EXTI_Line16 ((uint32_t)0x10000) /*!< External interrupt line 16 Connected to the9 W3 z+ n% G) ^5 O
- PVD Output */
8 H1 z4 J' H7 i3 V/ _ - #define EXTI_Line17 ((uint32_t)0x20000) /*!< External interrupt line 17 Connected to the
2 r' ]# A4 o, _" z" B* E- y) Q3 z, [" M - RTC Alarm event */
+ k0 r3 l7 L6 Y- c } - #define EXTI_Line18 ((uint32_t)0x40000) /*!< External interrupt line 18 Connected to the
8 X) C5 ]* b2 u - USB OTG FS Wakeup from suspend event */ / z- V' a$ r8 [' A' \( q* q7 L
- #define EXTI_Line19 ((uint32_t)0x80000) /*!< External interrupt line 19 Connected to the
/ [# G- [9 r) C& c - Ethernet Wakeup event */- @1 N/ G6 {# e, }% ]9 y- t
- #define EXTI_Line20 ((uint32_t)0x00100000) /*!< External interrupt line 20 Connected to the. ?. B) S- h9 q
- USB OTG HS (configured in FS) Wakeup event */- l- c! [) h8 K$ F6 Q3 ~3 K
- #define EXTI_Line21 ((uint32_t)0x00200000) /*!< External interrupt line 21 Connected to the * M* q2 O4 Z+ \1 n h
- RTC Tamper and Time Stamp events */ 7 o% y0 u1 }: I$ Y# x; ^0 q Z- Y
- #define EXTI_Line22 ((uint32_t)0x00400000) /*!< External interrupt line 22 Connected to the
* p; `+ c, n6 ?9 T% q - RTC Wakeup event */
0 j6 y7 r" V0 u. O - #define EXTI_Line23 ((uint32_t)0x00800000) /*!< External interrupt line 23 Connected to the
' F2 e. } \4 r' l- G) ~9 t' T - LPTIM Wakeup event */
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- #define IS_EXTI_LINE(LINE) ((((LINE) & (uint32_t)0xFF800000) == 0x00) && ((LINE) != (uint16_t)0x00))( B3 N! s) H# y: ?; m& Y/ R
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- #define IS_GET_EXTI_LINE(LINE) (((LINE) == EXTI_Line0) || ((LINE) == EXTI_Line1) || \- I+ \' M2 o4 U4 S4 `8 m1 u0 A# h. H/ T
- ((LINE) == EXTI_Line2) || ((LINE) == EXTI_Line3) || \
) V$ r; `+ C4 A. h: d - ((LINE) == EXTI_Line4) || ((LINE) == EXTI_Line5) || \3 J8 m3 [- A% W+ [
- ((LINE) == EXTI_Line6) || ((LINE) == EXTI_Line7) || \3 ]! y1 Y3 x! t5 l; T, W5 G
- ((LINE) == EXTI_Line8) || ((LINE) == EXTI_Line9) || \ K9 h: n! _6 R* K
- ((LINE) == EXTI_Line10) || ((LINE) == EXTI_Line11) || \
9 Q& J( a% B6 v - ((LINE) == EXTI_Line12) || ((LINE) == EXTI_Line13) || \2 G+ ~% b3 Y; Q% y" z3 d
- ((LINE) == EXTI_Line14) || ((LINE) == EXTI_Line15) || \
: h$ ? v' e) p4 ^' R - ((LINE) == EXTI_Line16) || ((LINE) == EXTI_Line17) || \1 X; w5 Z6 y. l3 Z
- ((LINE) == EXTI_Line18) || ((LINE) == EXTI_Line19) || \
3 c1 S4 g' x- o- c3 r: |( ]$ L. A' z3 S - ((LINE) == EXTI_Line20) || ((LINE) == EXTI_Line21) ||\
8 t- \+ b, C* m - ((LINE) == EXTI_Line22) || ((LINE) == EXTI_Line23))
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03. 相关函数
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b" ]+ R u5 h: k2 c6 J+ [" a- /* Exported macro ------------------------------------------------------------*/
% D& D- j7 G" o8 e) o - /* Exported functions --------------------------------------------------------*/+ V- Z8 e1 w1 n# G2 N
/ t' ?: X0 h. L6 s% a- /* Function used to set the EXTI configuration to the default reset state *****/ H6 C6 D, G$ \( h# U2 j
- void EXTI_DeInit(void);1 D; p2 N7 t* @) b: ]/ l
7 k4 @. `1 S: Z) G5 |1 ]- /* Initialization and Configuration functions *********************************/
& ^! r% t( f; y& C2 c0 `: ` - void EXTI_Init(EXTI_InitTypeDef* EXTI_InitStruct);
6 }5 A# R4 M( o" T5 n ~6 C - void EXTI_StructInit(EXTI_InitTypeDef* EXTI_InitStruct);
' t7 H5 y7 D3 H( n Y- \# O - void EXTI_GenerateSWInterrupt(uint32_t EXTI_Line);
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- /* Interrupts and flags management functions **********************************/
+ i: s+ e+ j% x2 q/ G5 H/ r - FlagStatus EXTI_GetFlagStatus(uint32_t EXTI_Line);
6 |2 k9 X" g* ]+ G - void EXTI_ClearFlag(uint32_t EXTI_Line);- n7 ~+ N5 o2 y: ~6 B/ ?9 F0 f4 a
- ITStatus EXTI_GetITStatus(uint32_t EXTI_Line);' J/ c9 W8 p+ t
- void EXTI_ClearITPendingBit(uint32_t EXTI_Line);" M1 X8 {5 ?* ?1 ], I
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