1)STM32F0有多个定时器,对应多个IRQn$ |( m+ u! }. j/ T7 _1 X
- TIM1_BRK_UP_TRG_COM_IRQn = 13, /*!< TIM1 Break, Update, Trigger and Commutation Interrupt */
8 A: x0 p- V( Z# z8 D% [ - TIM1_CC_IRQn = 14, /*!< TIM1 Capture Compare Interrupt */0 T# C% R& o8 e( D |+ P
- TIM3_IRQn = 16, /*!< TIM3 global Interrupt */8 M8 N8 F' C9 d& H' F" C
- TIM6_IRQn = 17, /*!< TIM6 global Interrupt */
" R: R3 R8 r/ x8 z0 X3 E, N - TIM14_IRQn = 19, /*!< TIM14 global Interrupt */
. [! |5 e, T% f - TIM15_IRQn = 20, /*!< TIM15 global Interrupt */
& U1 C# \0 ^6 y# K# @/ w - TIM16_IRQn = 21, /*!< TIM16 global Interrupt */) j7 d G+ b; _" l9 t
- TIM17_IRQn = 22, /*!< TIM17 global Interrupt */
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2)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.
' g6 ^) p% k' R - * @param None
2 d: v& _4 S, d# @* \ - * @retval None1 Z, W' X9 H' d9 S, K6 w
- */
+ A H( }( l0 _- p' T - void TIM14_IRQHandler(void)
- v- O5 t9 _" Z( a& T' X4 X - {
, u) l2 J$ s5 h - HAL_TIM_IRQHandler(&Input_Handle);
& M1 a9 h9 E" L7 L - }
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9 @' b6 [/ J& c3 }" a3 [: V3)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/ `0 Y7 U( ^' H
! q9 \# C2 O, \1 @- /**3 p! d1 Z: X% m D. _* P; j
- * @brief This function handles TIM interrupts requests.
1 t3 Z* c1 ]; q8 ^9 X) R - * @param htim TIM handle
& d- @+ L/ A8 ?7 G+ I# B. H% Y - * @retval None
" {6 M" m7 ?8 L' }- x& \ - */( q7 j' @" A! h" V6 a3 S
- void HAL_TIM_IRQHandler(TIM_HandleTypeDef *htim)" K$ `* l# m$ ^- Z9 x7 f
- {- g3 N; [% S" y% e
- /* Capture compare 1 event */
. T( E! k% L. \' n) F. Y - if(__HAL_TIM_GET_FLAG(htim, TIM_FLAG_CC1) != RESET)3 B: q$ S; O$ k' W* W
- {( r& ]6 U v3 _
- if(__HAL_TIM_GET_IT_SOURCE(htim, TIM_IT_CC1) !=RESET)
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- __HAL_TIM_CLEAR_IT(htim, TIM_IT_CC1);
9 ~0 J# F' ~' `; I# m - htim->Channel = HAL_TIM_ACTIVE_CHANNEL_1;
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' o5 R( d% R+ u- a, Y5 ~- /* Input capture event */4 z* g3 p3 d6 P$ c, h$ R. \ e. G
- if((htim->Instance->CCMR1 & TIM_CCMR1_CC1S) != 0x00U)
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- HAL_TIM_IC_CaptureCallback(htim);+ F1 d. q9 I+ D9 v' t' ^/ G+ o4 i
- }
* N5 {# G3 n* ^ - /* Output compare event */; q1 a1 a( |2 D' ~: a/ |
- else
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- HAL_TIM_OC_DelayElapsedCallback(htim);$ m; F; A4 U% z U0 |
- HAL_TIM_PWM_PulseFinishedCallback(htim);& _" w' U, E5 T4 ], Y. c6 O! J
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- htim->Channel = HAL_TIM_ACTIVE_CHANNEL_CLEARED;
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- }
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- /* Capture compare 2 event */
4 l2 X2 o' _$ Y6 Y9 E - if(__HAL_TIM_GET_FLAG(htim, TIM_FLAG_CC2) != RESET)4 r- V% T6 ?8 W. N
- {
l& ]3 i3 o, a( i; G - if(__HAL_TIM_GET_IT_SOURCE(htim, TIM_IT_CC2) !=RESET)
Z; L9 N0 q. P2 |( M - {
E( B5 k+ D K6 d - __HAL_TIM_CLEAR_IT(htim, TIM_IT_CC2);
7 o1 z# J: F+ d+ P( P - htim->Channel = HAL_TIM_ACTIVE_CHANNEL_2;
9 Z; ]3 l& Y& a6 T5 i) j - /* Input capture event */
. y- @1 D4 W' S) @/ K - if((htim->Instance->CCMR1 & TIM_CCMR1_CC2S) != 0x00U)( d: j l4 k _( y$ Q. W* E
- {- M7 k, [3 g/ f* f) r
- HAL_TIM_IC_CaptureCallback(htim);. Z7 @$ D) \8 D5 }6 {, M
- }
6 e7 U @6 a$ e$ i; g: { K7 [ - /* Output compare event */
. n8 g p( f. M$ F; s& N - else
; c3 p/ _" W1 I - {
# ]4 I$ j0 t. y" A3 `$ ], r - HAL_TIM_OC_DelayElapsedCallback(htim);0 e5 I' h( C3 q" B3 s7 m, z/ b, Q
- HAL_TIM_PWM_PulseFinishedCallback(htim);9 X4 E. v9 ?+ ~
- }
. n; r9 |) } G' e$ Q2 U - htim->Channel = HAL_TIM_ACTIVE_CHANNEL_CLEARED;
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- /* Capture compare 3 event */$ l; ~; |& Q$ |( h. @4 a
- if(__HAL_TIM_GET_FLAG(htim, TIM_FLAG_CC3) != RESET)
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- if(__HAL_TIM_GET_IT_SOURCE(htim, TIM_IT_CC3) !=RESET)8 c* N5 f9 Z- F+ X E) D
- {0 i- j$ [- B2 r
- __HAL_TIM_CLEAR_IT(htim, TIM_IT_CC3);, [7 S6 k5 X& U8 r6 u2 M: ^# `
- htim->Channel = HAL_TIM_ACTIVE_CHANNEL_3;* F7 C, E6 i& s- t: q: ? L4 h5 T
- /* Input capture event */
% _) t0 u9 U; v - if((htim->Instance->CCMR2 & TIM_CCMR2_CC3S) != 0x00U)) Z7 d- |6 K* M$ s: s
- {7 U1 r- L' i3 }5 }
- HAL_TIM_IC_CaptureCallback(htim);
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- /* Output compare event */
9 q0 B- R$ @& H$ t - else- h4 {$ N% E9 Q6 Y
- {
: l- I9 E' J l: t - HAL_TIM_OC_DelayElapsedCallback(htim);
% E. f. f& ^3 _2 a - HAL_TIM_PWM_PulseFinishedCallback(htim);& T) s6 W. g& l, [. ?2 A
- }0 p+ i0 {% t7 y
- htim->Channel = HAL_TIM_ACTIVE_CHANNEL_CLEARED;
1 ^* ?2 Z8 T/ |* M - }5 S" x4 x+ T. i7 C% T" J5 x! e: G
- }
- z3 t# |# _& E$ i( { - /* Capture compare 4 event */0 N6 k ~& t; F) j
- if(__HAL_TIM_GET_FLAG(htim, TIM_FLAG_CC4) != RESET)
# Z% i- Z% V/ r8 o0 v! ~$ H- v: m# d - {! ~3 r- o7 t9 ~$ |
- if(__HAL_TIM_GET_IT_SOURCE(htim, TIM_IT_CC4) !=RESET)- X) d2 q3 d+ `* s3 m
- {* g. M0 z4 _ ?9 p% E/ `) H1 k p
- __HAL_TIM_CLEAR_IT(htim, TIM_IT_CC4);8 x/ u1 e- Z/ o, l {. N
- htim->Channel = HAL_TIM_ACTIVE_CHANNEL_4;" |9 I+ h- `* h
- /* Input capture event */
: L; O& P" S3 e3 j" N P - if((htim->Instance->CCMR2 & TIM_CCMR2_CC4S) != 0x00U)
8 R6 O- F, v" ]' G& }/ G3 u - {
, u# Y% k3 d3 q" j% \ Q2 }) b% K - HAL_TIM_IC_CaptureCallback(htim);5 U Q5 d$ `2 e& p% h" c/ z' d
- }( k R* ?6 t2 N, Q/ a
- /* Output compare event */
- m8 @5 d& A# e# Y) R/ I - else. ~( n- W' A0 K1 |9 S' g: S
- {
3 l1 F8 T% }/ Q - HAL_TIM_OC_DelayElapsedCallback(htim);' d" l& Q+ Q1 @4 p
- HAL_TIM_PWM_PulseFinishedCallback(htim);
' p5 \) @, |# e u - }
! G2 {( U6 D$ O% d0 ]+ [ - htim->Channel = HAL_TIM_ACTIVE_CHANNEL_CLEARED;
' {8 s3 E. i* O8 f3 ?1 p - }
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- /* TIM Update event */
# i1 D) X7 n) O - if(__HAL_TIM_GET_FLAG(htim, TIM_FLAG_UPDATE) != RESET)0 y t7 Y) O F2 i) R/ ^% h: \& Q
- {! h# D. [- `% L: ^0 X* O
- if(__HAL_TIM_GET_IT_SOURCE(htim, TIM_IT_UPDATE) !=RESET)
3 d$ K4 A/ K( Y# |. c9 } - {' m5 d: n8 |& ]
- __HAL_TIM_CLEAR_IT(htim, TIM_IT_UPDATE);, F& z4 N& ]" q* u5 J
- HAL_TIM_PeriodElapsedCallback(htim);
+ Y2 [- U, L3 A7 m: b+ \ - }
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- /* TIM Break input event */0 d% Q' F# P( _3 \$ Y3 @
- if(__HAL_TIM_GET_FLAG(htim, TIM_FLAG_BREAK) != RESET)
. A6 L3 W1 v1 Y3 Y- S$ [3 q1 ?: [ - {6 c/ ]- g' W$ ~, z, r# C
- if(__HAL_TIM_GET_IT_SOURCE(htim, TIM_IT_BREAK) !=RESET), p: {6 R) t; z' p& ^! r/ x
- { s2 ^& i! i+ c2 j. T- I) x
- __HAL_TIM_CLEAR_IT(htim, TIM_IT_BREAK);
! t" ^' k1 x9 E - HAL_TIMEx_BreakCallback(htim);
. }& q0 z! u3 s) @4 t$ a' } - }
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- /* TIM Trigger detection event */
8 \; q; ?: O( D - if(__HAL_TIM_GET_FLAG(htim, TIM_FLAG_TRIGGER) != RESET)
$ x, ]) i8 a& r+ B; W - {( |, x9 Q& @, _* _2 Z! L
- if(__HAL_TIM_GET_IT_SOURCE(htim, TIM_IT_TRIGGER) !=RESET)
5 w' E0 }3 @5 W$ k M4 d0 [ - {
, r1 y: e# a3 }" x" R. R - __HAL_TIM_CLEAR_IT(htim, TIM_IT_TRIGGER);" O6 d5 `: t5 t2 ^5 E5 ?# e3 X
- HAL_TIM_TriggerCallback(htim);: q7 D* p x( e( T9 m
- }
( a# i, A6 s) _" M2 d4 I - }, M( V) |. Q# R4 U9 x
- /* TIM commutation event */
1 V! \+ L2 C. S& N' h/ g0 K - if(__HAL_TIM_GET_FLAG(htim, TIM_FLAG_COM) != RESET); R7 w* Z! \. p' z# h: i n
- {7 v8 G& v) Q2 `# t! U/ [2 P# C5 \
- if(__HAL_TIM_GET_IT_SOURCE(htim, TIM_IT_COM) !=RESET)# e+ f5 U; W8 v! J
- {/ r% [6 E) z0 H$ ^1 o2 S. t" Y2 Q# m
- __HAL_TIM_CLEAR_IT(htim, TIM_FLAG_COM);
. V$ t+ g* v! F. |& V - HAL_TIMEx_CommutationCallback(htim);
1 t4 t. b4 E- s6 `$ y - }# B) u8 \* e1 X' W: X$ C! _
- }
9 N/ h. q2 R3 @4 k- z2 m - }
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) @% P P' \5 T0 m4)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);
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1 G- A+ H2 F$ z) M$ a8 j5)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$ d. i% X# \" Y6 ~* [7 }2 o6 K
4 o; m( y6 ]( c; y' @- void TIM14_IRQHandler(void)3 r1 A& ?' N' J# A5 o
- { r8 q' P% d; i
- HAL_TIM_IRQHandler(&Input_Handle);+ w7 X$ y3 ?" Z6 [$ S
- - @9 v, F1 D9 P7 x- s) u# p/ `
- //其他处理代码
; e4 J' C( v! `/ ? - }
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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。& X* ]! u+ h ^2 Q) h( T
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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。
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* O0 [4 ^" ?# \' i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。
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