1)STM32F0有多个定时器,对应多个IRQn
+ d6 [; _/ [1 q% N2 C! I" \3 x- TIM1_BRK_UP_TRG_COM_IRQn = 13, /*!< TIM1 Break, Update, Trigger and Commutation Interrupt */; D q3 g6 B1 K& i# I8 J8 I
- TIM1_CC_IRQn = 14, /*!< TIM1 Capture Compare Interrupt */
7 {' ~& i& d* |; l" p - TIM3_IRQn = 16, /*!< TIM3 global Interrupt */
3 [6 Z3 A: |" V$ @! K - TIM6_IRQn = 17, /*!< TIM6 global Interrupt */7 E) L0 r4 W2 ]& g
- TIM14_IRQn = 19, /*!< TIM14 global Interrupt */
2 }1 N! Z% I9 w/ ?5 U' m - TIM15_IRQn = 20, /*!< TIM15 global Interrupt */
& `. W T6 ~# A! }( D( G - TIM16_IRQn = 21, /*!< TIM16 global Interrupt */: R. q( j" m9 u4 l6 r% @" q
- TIM17_IRQn = 22, /*!< TIM17 global Interrupt */
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3 t6 Q# E ?. ~$ F2)通常每个IRQn对应一个zho中断函数
3 }! L7 @# M; b" E% D- t- /**/ D o( c& P8 v5 u8 j6 W
- * @brief This function handles TIM14 global interrupt request.. T: j4 V, e) d( W# A" o1 r
- * @param None' ~# |& q- l* K# j% i& M0 B
- * @retval None: e* `/ a# F; y9 c r6 g) u
- */
3 a' G! W. p/ t - void TIM14_IRQHandler(void)8 {6 a, N5 K5 A8 v7 B
- {
; c( y2 r3 ~, F" }; k! `7 A - HAL_TIM_IRQHandler(&Input_Handle);
7 k; H( U* e; e) _1 b - }
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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
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- * @brief This function handles TIM interrupts requests.* b0 b' F* A( y0 J
- * @param htim TIM handle
) v$ T4 x# m8 m |( Y+ w) C& s- _ - * @retval None, V( T* K" ?, p9 [$ P8 z" Z
- */5 f% Z! g# \( C F* a
- void HAL_TIM_IRQHandler(TIM_HandleTypeDef *htim)
& F( h% z+ _& k& O - {
6 } S+ g) |& t) b# X - /* Capture compare 1 event */
+ W$ @3 p9 B7 d5 A5 \7 h- Q - if(__HAL_TIM_GET_FLAG(htim, TIM_FLAG_CC1) != RESET)
3 I4 K5 p/ O# K1 r% i: [ - {
- W( }1 d" m' D - if(__HAL_TIM_GET_IT_SOURCE(htim, TIM_IT_CC1) !=RESET)/ q/ m) p+ O5 K! O3 p2 w p( }% f/ @
- {
9 R; _& {" i0 r- V0 K - {
m0 h$ x3 J# S( M8 T' g - __HAL_TIM_CLEAR_IT(htim, TIM_IT_CC1);/ Y( a& b+ U$ U! r! O& H' g
- htim->Channel = HAL_TIM_ACTIVE_CHANNEL_1;
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1 w5 O: \ k Q; ^2 w# w- /* Input capture event */
, Y! Q. e: Y" n: S$ ^/ B - if((htim->Instance->CCMR1 & TIM_CCMR1_CC1S) != 0x00U)
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- HAL_TIM_IC_CaptureCallback(htim);7 `$ h, @2 H: k& O( T
- }
( o8 e: ]; a/ S' W$ F - /* Output compare event */
( l9 Q# Q L1 Z2 O S* l - else
2 C5 ]9 v+ Q8 S! w. C - {
7 }5 A0 |/ l: }4 f7 h0 |" \ - HAL_TIM_OC_DelayElapsedCallback(htim);$ W# g6 _0 c' G8 J; ?: s' ]' O
- HAL_TIM_PWM_PulseFinishedCallback(htim);; e4 |1 b2 F* `/ q) v1 p
- }
+ m5 {$ V+ l( R/ n0 ^7 Y - htim->Channel = HAL_TIM_ACTIVE_CHANNEL_CLEARED;
# l3 D5 i3 J* S8 @ - }
& q8 l, J# \ Y1 V! R - }
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- /* Capture compare 2 event */2 A; D0 `8 m, V- c
- if(__HAL_TIM_GET_FLAG(htim, TIM_FLAG_CC2) != RESET)
; Y! W( N/ s" m m# m' i - {
2 P: L! F9 D/ } W. u7 y - if(__HAL_TIM_GET_IT_SOURCE(htim, TIM_IT_CC2) !=RESET)
q- u3 [! f' h5 Q - {
1 b* r3 N J, b5 Q - __HAL_TIM_CLEAR_IT(htim, TIM_IT_CC2);' E0 C- y3 ^8 `9 r
- htim->Channel = HAL_TIM_ACTIVE_CHANNEL_2;
& P/ B' s* o! n6 k: a' z - /* Input capture event */7 f6 k! A& [2 @) f! f4 y% |
- if((htim->Instance->CCMR1 & TIM_CCMR1_CC2S) != 0x00U)
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- HAL_TIM_IC_CaptureCallback(htim);$ I( {2 J8 f4 m
- }0 D% Y: n! A; O5 O s
- /* Output compare event */
, D! |1 h5 o" o: \! i - else. @4 E( b F/ p
- {
4 {- n, G( D' n; L - HAL_TIM_OC_DelayElapsedCallback(htim);
. }: _% }3 D: U/ M - HAL_TIM_PWM_PulseFinishedCallback(htim);
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- htim->Channel = HAL_TIM_ACTIVE_CHANNEL_CLEARED;* P7 T* o, W, I8 I+ o: q' ]
- }
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- /* Capture compare 3 event */
) W. }& h* C: ^, b1 u+ F3 W% } - if(__HAL_TIM_GET_FLAG(htim, TIM_FLAG_CC3) != RESET)4 z, N; \! h0 k
- {+ z6 w2 _& t# I$ i9 X
- if(__HAL_TIM_GET_IT_SOURCE(htim, TIM_IT_CC3) !=RESET)
9 H; F. L' d e/ n - {
+ ~; i0 }8 A3 k4 h - __HAL_TIM_CLEAR_IT(htim, TIM_IT_CC3);
! p# s3 w& K2 R) n* F - htim->Channel = HAL_TIM_ACTIVE_CHANNEL_3;
( O2 B( z% `) D0 I) i1 g# q - /* Input capture event */# X4 q% N) r& q# }6 Q3 A4 P2 [
- if((htim->Instance->CCMR2 & TIM_CCMR2_CC3S) != 0x00U)
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- HAL_TIM_IC_CaptureCallback(htim);3 c& V3 f# M) A% g8 P' C8 Y4 W
- }
& E" \" b. u5 S m - /* Output compare event */
" e1 X1 J$ f2 J& c$ {5 J! } - else
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- HAL_TIM_OC_DelayElapsedCallback(htim);& i1 F1 \+ a( j; A) T0 h
- HAL_TIM_PWM_PulseFinishedCallback(htim);
! |0 E$ p) ~" |# {1 d: C# t: ?: | - }3 s4 [& I E5 g! R
- htim->Channel = HAL_TIM_ACTIVE_CHANNEL_CLEARED;
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- }4 d+ Y! m0 f9 g2 [# `8 I
- /* Capture compare 4 event */
: J- S0 R( C* |. _1 @. _ - if(__HAL_TIM_GET_FLAG(htim, TIM_FLAG_CC4) != RESET)
4 ]+ e' ?+ w, x - {* ^" q* f. c$ D* ^6 V
- if(__HAL_TIM_GET_IT_SOURCE(htim, TIM_IT_CC4) !=RESET)
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9 r. W3 F( x g% B9 R6 D3 L - __HAL_TIM_CLEAR_IT(htim, TIM_IT_CC4);
* T/ ]# x2 M* w" \3 B$ V - htim->Channel = HAL_TIM_ACTIVE_CHANNEL_4;0 {4 Y/ g' h+ I7 i6 m4 e) k+ z4 X6 H
- /* Input capture event */7 A8 A z3 P( ]& O$ S, e
- if((htim->Instance->CCMR2 & TIM_CCMR2_CC4S) != 0x00U)
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- HAL_TIM_IC_CaptureCallback(htim);
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- /* Output compare event */7 S, ~5 C. I9 F4 t7 E! [
- else' J L. N. F; V
- {* N2 \3 l5 _/ j8 U. K( F
- HAL_TIM_OC_DelayElapsedCallback(htim);
/ q; w/ {/ A3 q: o' ^ - HAL_TIM_PWM_PulseFinishedCallback(htim);" q. `8 o3 {5 y! p/ `
- }
u! C& {3 L3 M1 A/ _4 H% z! A5 o' I - htim->Channel = HAL_TIM_ACTIVE_CHANNEL_CLEARED;
+ {- |' L/ y; M @/ P4 N0 |% o - }1 z9 H! v N# e' _3 Z: h
- }
/ [' P8 k# Q% F" i8 ]" X - /* TIM Update event */" M/ h3 p: d3 N' M2 [. K
- if(__HAL_TIM_GET_FLAG(htim, TIM_FLAG_UPDATE) != RESET)5 r! a* ]8 @* x- x
- {0 ]5 j% W% L& A9 {+ R6 A
- if(__HAL_TIM_GET_IT_SOURCE(htim, TIM_IT_UPDATE) !=RESET)8 j- v+ Y9 k- x7 B& x
- {+ D5 \! ?; h9 W |
- __HAL_TIM_CLEAR_IT(htim, TIM_IT_UPDATE);% [8 m7 q9 J) K1 F
- HAL_TIM_PeriodElapsedCallback(htim);
$ u' ^7 u: ^2 v) v2 h L! L W, X - }
8 {+ m! v* f0 I5 ~' M6 A/ D - }
# A' q5 ]' s: B q - /* TIM Break input event */
9 S3 `7 U- ^ p0 d& S - if(__HAL_TIM_GET_FLAG(htim, TIM_FLAG_BREAK) != RESET)
, x4 J7 x1 a0 x2 m( x - {
0 G1 \1 b" V* ?& r3 A - if(__HAL_TIM_GET_IT_SOURCE(htim, TIM_IT_BREAK) !=RESET)
% b; U4 ^/ [4 Q" X. D - {4 g1 g4 S T6 n( k
- __HAL_TIM_CLEAR_IT(htim, TIM_IT_BREAK);5 |. U1 `: a! Y8 t2 I9 J3 }
- HAL_TIMEx_BreakCallback(htim);7 a6 o5 X, B' r# T3 h
- }
/ d3 F4 ^! x8 E - }
% Y) F9 V6 F2 [$ k a - /* TIM Trigger detection event */! k$ |4 S: H& ]8 ^. f, X
- if(__HAL_TIM_GET_FLAG(htim, TIM_FLAG_TRIGGER) != RESET)) _8 H0 [% l2 w* Z4 q
- {+ h6 z0 P- ]) Z% i2 j7 V7 E. l
- if(__HAL_TIM_GET_IT_SOURCE(htim, TIM_IT_TRIGGER) !=RESET)
) [ _* T5 l' m0 r- v - {
' H4 Z! b) x0 |7 ~( b$ j - __HAL_TIM_CLEAR_IT(htim, TIM_IT_TRIGGER);4 C" c' \# S, _# Q
- HAL_TIM_TriggerCallback(htim);
t8 G( A8 _# k' j - }
/ n3 ]+ D/ ?7 d7 d/ n - }
6 I5 c" F3 N. t; b - /* TIM commutation event */
/ L6 z" F3 X( }0 X7 s - if(__HAL_TIM_GET_FLAG(htim, TIM_FLAG_COM) != RESET)# \. e8 F. K) T: @1 N# c+ N9 R
- {
?) b4 g# |( k5 G - if(__HAL_TIM_GET_IT_SOURCE(htim, TIM_IT_COM) !=RESET)
* B& R7 F- g4 Q8 m' l - {
4 |7 P) x4 _+ m' t2 \, N/ v: E9 w - __HAL_TIM_CLEAR_IT(htim, TIM_FLAG_COM);
) Y( g. c- p# Q$ w3 J2 L, i - HAL_TIMEx_CommutationCallback(htim);
P3 V3 k- c- I/ S U/ X6 [ - }8 R0 \9 \6 n& k3 M. S/ g
- }4 {( H. X& N8 @( {4 Z
- }
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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);/ r S6 V. s' a/ o$ [
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5)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! n) W9 p0 d5 e& F+ W) D; {9 O
- U1 a' h3 y, y
- void TIM14_IRQHandler(void)
! B4 l: p1 R6 r& S8 w8 [, c- N! B! D! d - { ( i, y+ ]" c- U, ]8 X+ ]
- HAL_TIM_IRQHandler(&Input_Handle);
/ @! l' E7 G* J
" P' ]6 Z( W# J" |# U- //其他处理代码/ a. ]+ @7 m7 u2 V7 L0 `: M
- }
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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。' l& Z' V+ K4 w. ?
8 f: \; @7 R2 }; m
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。. s9 E: l; B- J% R/ P6 |! @
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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。8 o2 e' ]4 d1 y }2 b3 v- Z
6 ~, t9 I8 E: B2 [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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9)ken坑啊,都怪对库的执行sh顺序不了解。6 u% E) v# E7 X* \: D$ t
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