1)STM32F0有多个定时器,对应多个IRQn0 e) Y0 j$ g* t
- TIM1_BRK_UP_TRG_COM_IRQn = 13, /*!< TIM1 Break, Update, Trigger and Commutation Interrupt */
+ F% q; G9 p2 x4 V - TIM1_CC_IRQn = 14, /*!< TIM1 Capture Compare Interrupt */% i5 t# a( t0 n" |( |! W
- TIM3_IRQn = 16, /*!< TIM3 global Interrupt */5 e# \. N8 b% U( B3 C
- TIM6_IRQn = 17, /*!< TIM6 global Interrupt */7 Y0 j5 P6 ^5 t3 ^
- TIM14_IRQn = 19, /*!< TIM14 global Interrupt */
/ y: G, {$ x& m0 ^" _& G' f4 F - TIM15_IRQn = 20, /*!< TIM15 global Interrupt */
1 l9 x& V/ ^" C8 p1 F* {' C - TIM16_IRQn = 21, /*!< TIM16 global Interrupt */0 {7 u) `& A# V
- TIM17_IRQn = 22, /*!< TIM17 global Interrupt */
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' S3 p, {0 E4 g! x: d$ {$ h) |/ U2)通常每个IRQn对应一个zho中断函数
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- * @brief This function handles TIM14 global interrupt request.+ X# N4 u( Y" S& M7 j- s6 i) Q: ^; A
- * @param None
. Y3 y7 F( z- ?! y - * @retval None8 }. [- Q" ^4 I9 b g$ X' r
- */" \" v3 G* o9 x; @9 w( d
- void TIM14_IRQHandler(void)) b4 b- H( e: }# R, Z+ Z' Q
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- HAL_TIM_IRQHandler(&Input_Handle);
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3)中断函数里通常会调用HAL_TIM_IRQHandler(&Input_Handle);这个函数来区分是哪一种中断8 t/ s) M' ]( W+ o
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- * @brief This function handles TIM interrupts requests.' v$ k0 \5 f; I3 D
- * @param htim TIM handle9 e1 }: d) w, T& B
- * @retval None
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- void HAL_TIM_IRQHandler(TIM_HandleTypeDef *htim)
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- /* Capture compare 1 event */# t0 J( \5 G4 u& U2 V% z5 c
- if(__HAL_TIM_GET_FLAG(htim, TIM_FLAG_CC1) != RESET)$ o C0 N0 y" g$ f+ C0 F
- {
$ o6 _1 D6 H3 c7 K1 P/ z) i0 m! S - if(__HAL_TIM_GET_IT_SOURCE(htim, TIM_IT_CC1) !=RESET)
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- __HAL_TIM_CLEAR_IT(htim, TIM_IT_CC1);2 L% B3 q" S; i/ ?% z
- htim->Channel = HAL_TIM_ACTIVE_CHANNEL_1;# O* N7 j5 `- K: m* O6 [
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- /* Input capture event */! B9 K! O# I# N$ M. ]' P
- if((htim->Instance->CCMR1 & TIM_CCMR1_CC1S) != 0x00U)+ F9 R) H; Q+ _: P# c# V
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- HAL_TIM_IC_CaptureCallback(htim);0 G+ b$ \- v7 e/ g+ y( `
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- /* Output compare event */
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- {
* W6 i! ]3 c- h# f- ^% t. P - HAL_TIM_OC_DelayElapsedCallback(htim);
* m. d p2 W/ ? - HAL_TIM_PWM_PulseFinishedCallback(htim);) D7 K5 S7 H6 r2 }3 I0 i, Q
- }
9 `) J2 \0 W1 t% _- }3 j3 H5 M - htim->Channel = HAL_TIM_ACTIVE_CHANNEL_CLEARED;
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- /* Capture compare 2 event */0 W3 e/ ~4 s& m( D
- if(__HAL_TIM_GET_FLAG(htim, TIM_FLAG_CC2) != RESET)
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! i/ W) i# X$ w5 s4 A$ P - if(__HAL_TIM_GET_IT_SOURCE(htim, TIM_IT_CC2) !=RESET)
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) A% ?* {' C$ c' A - __HAL_TIM_CLEAR_IT(htim, TIM_IT_CC2);
* v( F6 n- g7 ~+ T5 u - htim->Channel = HAL_TIM_ACTIVE_CHANNEL_2;
3 W3 f& _' t% _( t, L3 [2 {1 U T5 ~ - /* Input capture event */. x& n- c- b, A# z- b
- if((htim->Instance->CCMR1 & TIM_CCMR1_CC2S) != 0x00U)
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- HAL_TIM_IC_CaptureCallback(htim);2 t/ @: c% W" d$ s$ x" j
- }. x4 g5 A5 y8 P0 Y7 U9 D) {
- /* Output compare event */; N3 ?8 ~6 B* u+ Q. a
- else
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- HAL_TIM_OC_DelayElapsedCallback(htim);0 p# e9 N6 l/ ]
- HAL_TIM_PWM_PulseFinishedCallback(htim);
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9 z" C0 ?* d( I4 ] - htim->Channel = HAL_TIM_ACTIVE_CHANNEL_CLEARED;
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- }
3 y; @& L* g L; [, k- f% M - /* Capture compare 3 event */) E. F2 M( a' y# F
- if(__HAL_TIM_GET_FLAG(htim, TIM_FLAG_CC3) != RESET)+ E" ~) ?, v- ]- w( ^
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- if(__HAL_TIM_GET_IT_SOURCE(htim, TIM_IT_CC3) !=RESET)
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- __HAL_TIM_CLEAR_IT(htim, TIM_IT_CC3);
! F% p: f7 \' S6 N - htim->Channel = HAL_TIM_ACTIVE_CHANNEL_3;
& t$ U& [6 `/ t0 [2 |0 o1 H - /* Input capture event */
0 p; ]) ?6 l7 i# X - if((htim->Instance->CCMR2 & TIM_CCMR2_CC3S) != 0x00U)" }/ L. i7 I* m) z& ]9 a4 `2 M
- {
7 R' s* p/ q5 ]& r9 U - HAL_TIM_IC_CaptureCallback(htim);
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9 G. a: ~! u" x1 ] - /* Output compare event */8 w% a. m: s" v" |' ~
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- HAL_TIM_OC_DelayElapsedCallback(htim);
! h, K, S* Z" k" W) w - HAL_TIM_PWM_PulseFinishedCallback(htim);5 ^: A1 {+ e# S* E8 }- d
- }
2 u' Z: j" C. M: g - htim->Channel = HAL_TIM_ACTIVE_CHANNEL_CLEARED;
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+ u& S `# S% @' U4 P* f' { - /* Capture compare 4 event */0 _6 J' i2 K" H
- if(__HAL_TIM_GET_FLAG(htim, TIM_FLAG_CC4) != RESET)
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- if(__HAL_TIM_GET_IT_SOURCE(htim, TIM_IT_CC4) !=RESET)' G7 v" e& w# E$ n0 B6 g
- {
$ N k; ?4 Y2 p& H& T8 q - __HAL_TIM_CLEAR_IT(htim, TIM_IT_CC4);2 P! J% m a5 _
- htim->Channel = HAL_TIM_ACTIVE_CHANNEL_4;9 T" [0 z4 W$ f: ?7 [% M
- /* Input capture event */, w1 t/ z% @: \
- if((htim->Instance->CCMR2 & TIM_CCMR2_CC4S) != 0x00U); e( j! B- q4 @$ s* H" j
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- HAL_TIM_IC_CaptureCallback(htim);& U$ x% y( m1 Q9 J# W" o
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- /* Output compare event */
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3 Q5 Q8 E2 {* R# K7 {5 _ j - HAL_TIM_OC_DelayElapsedCallback(htim);1 G# D) K. {& Z+ D: F. W; e5 \
- HAL_TIM_PWM_PulseFinishedCallback(htim);) C/ ]2 `% J* }+ _ ~9 a$ o/ m
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- htim->Channel = HAL_TIM_ACTIVE_CHANNEL_CLEARED;
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- /* TIM Update event */
; k" Z* N/ |# G0 \$ c - if(__HAL_TIM_GET_FLAG(htim, TIM_FLAG_UPDATE) != RESET)
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0 ]& n$ N: p p: y+ y- ? - if(__HAL_TIM_GET_IT_SOURCE(htim, TIM_IT_UPDATE) !=RESET)
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- __HAL_TIM_CLEAR_IT(htim, TIM_IT_UPDATE);7 }# U+ |. b8 d# u4 ?1 w
- HAL_TIM_PeriodElapsedCallback(htim);( P# Q! l& J$ e5 j+ m0 {
- }
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1 \7 D" K- a3 c. J - /* TIM Break input event */
7 N3 O, V* |) A# J- G - if(__HAL_TIM_GET_FLAG(htim, TIM_FLAG_BREAK) != RESET)
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- if(__HAL_TIM_GET_IT_SOURCE(htim, TIM_IT_BREAK) !=RESET)) [% B: v1 v: k# H5 C
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- __HAL_TIM_CLEAR_IT(htim, TIM_IT_BREAK);! W/ k/ B8 ]: d- c k
- HAL_TIMEx_BreakCallback(htim);
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- /* TIM Trigger detection event */
- p" _1 f0 U$ g - if(__HAL_TIM_GET_FLAG(htim, TIM_FLAG_TRIGGER) != RESET)
( q. N3 V, m6 a: x- R - {
6 p% J; M" e9 P% E T5 c; n: Z3 R - if(__HAL_TIM_GET_IT_SOURCE(htim, TIM_IT_TRIGGER) !=RESET); _2 J! w( @+ C/ r/ V( t: W
- {
6 y6 P/ h& ^4 [6 _( l3 o9 _ - __HAL_TIM_CLEAR_IT(htim, TIM_IT_TRIGGER);
7 q& z' ]- w7 x4 Y& B W- v5 Q - HAL_TIM_TriggerCallback(htim);
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- }
$ ]& T; y1 Q2 f7 I3 L8 r - /* TIM commutation event */' X( O9 b0 f# n+ B
- if(__HAL_TIM_GET_FLAG(htim, TIM_FLAG_COM) != RESET), X, z7 W1 o; ]
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- if(__HAL_TIM_GET_IT_SOURCE(htim, TIM_IT_COM) !=RESET), o) j0 z* a* ~" T. G$ @3 o* g0 z
- {
; q% p8 m1 `$ l; O$ m - __HAL_TIM_CLEAR_IT(htim, TIM_FLAG_COM);
4 i! O+ B( U) s! F& r - HAL_TIMEx_CommutationCallback(htim);" t( M; P) _8 t1 o4 o
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- }
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4)在这个函数里根据不同的中断,调用不同的回调函数,像最基本的计时中断,调用HAL_TIM_PeriodElapsedCallback(htim);; e5 C( W( Z+ F6 M4 H. t" c
2 B4 H+ w5 ]+ e8 a& a2 n6 m5)问题来了:当我的程序需要用多个di开始定时器时,而且有相同的中断。开始我以为可以在- HAL_TIM_IRQHandler(&Input_Handle);后面写自己的处理代码2 H8 l0 a& m- ~/ O2 R0 f
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- void TIM14_IRQHandler(void)" |9 [5 J- x4 o7 B Q6 K, n D) P3 d6 d
- {
2 V* f# d/ m; n H1 P8 x/ o9 ~- I0 J - HAL_TIM_IRQHandler(&Input_Handle);1 X6 y4 T5 E5 c) ^4 v: U! h
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- //其他处理代码
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6)但是,在使用Freemodbus的时候FreeModbus用到的定时器在HAL_TIM_PeriodElapsedCallback(htim)中执行了TIMERExpiredISR();这个函数。
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7)当我用到另一个别的定时器的的时候,因为我在HAL_TIM_PeriodElapsedCallback(htim)这个函数里没有区分是哪个定时器产生的中断,所以当其他定时器产生中断时也顺便执行了属于FreeModbus的这个TIMERExpiredISR();处理函数。& f9 j d: ^3 k/ p* T" K* ^( f0 d
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8)这样就导致了一个奇怪的xian现象:只有我一启动别的定时器。主机Modbus Poll的时候就会出现Timeout的情况。5 k# l; C0 J8 w4 U7 }
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在HAL_TIM_PeriodElapsedCallback(htim)中区分zh中断来源之后,问题就解决了。
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$ `7 W9 ^% \/ w: B4 q- X: V* N9)ken坑啊,都怪对库的执行sh顺序不了解。
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