1)STM32F0有多个定时器,对应多个IRQn3 [5 r L ]% ^) Z
- TIM1_BRK_UP_TRG_COM_IRQn = 13, /*!< TIM1 Break, Update, Trigger and Commutation Interrupt */
3 A" y1 L4 F9 b# H- | ~ - TIM1_CC_IRQn = 14, /*!< TIM1 Capture Compare Interrupt */9 F" Z+ E$ {6 g d4 M
- TIM3_IRQn = 16, /*!< TIM3 global Interrupt */3 Z8 L! _# M. ]( Z' D: Y, J4 ~: c
- TIM6_IRQn = 17, /*!< TIM6 global Interrupt */
5 c9 v7 F8 J# O5 [+ A) i% }2 O8 z - TIM14_IRQn = 19, /*!< TIM14 global Interrupt */; b$ J# K* G9 J+ Z; ?( @3 w
- TIM15_IRQn = 20, /*!< TIM15 global Interrupt */
R% i& Q' B$ z2 K9 F - TIM16_IRQn = 21, /*!< TIM16 global Interrupt */
2 T1 C' m$ D- B7 ` - TIM17_IRQn = 22, /*!< TIM17 global Interrupt */
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3 q) |3 [2 V- p7 E. v2)通常每个IRQn对应一个zho中断函数/ ^, V: ?- l6 Q6 S& @+ k2 U
- /**
5 D! V9 `7 @" I( ~% ?! b - * @brief This function handles TIM14 global interrupt request.
2 S0 f2 V' [2 h4 {0 y- @+ `: y - * @param None
8 b+ S. u! ]( k X0 ` - * @retval None' i c0 Q7 |4 V
- */1 }& L0 [1 Q! z
- void TIM14_IRQHandler(void)& c& z2 i; G8 @. n; a4 t' f6 ?# e9 G
- {
& J! |) K, I% I - HAL_TIM_IRQHandler(&Input_Handle);
/ ?0 V3 Y# N$ r. V" [ - }
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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
! E: S* u+ r. v2 Q- h
6 G% b' g* |" O. o2 K2 V* c- /**
. |% v0 h2 T+ D4 l, @' H) w - * @brief This function handles TIM interrupts requests.
0 q4 ] q! ]2 l! I0 E4 U - * @param htim TIM handle, F0 {$ s3 o- l# d7 r
- * @retval None
& M( g; A5 l( h5 r& b - *// r0 J9 H! t) N
- void HAL_TIM_IRQHandler(TIM_HandleTypeDef *htim)
6 o! Y6 _5 k: ~& a; H - {
2 d: R; P3 I( ]) g4 [% G - /* Capture compare 1 event */6 _* b: E2 X% ~( p
- if(__HAL_TIM_GET_FLAG(htim, TIM_FLAG_CC1) != RESET)9 v8 m' d) P& `( f1 s2 v4 w
- {9 Z, ^0 z8 Z3 ]9 H" v' i3 a
- if(__HAL_TIM_GET_IT_SOURCE(htim, TIM_IT_CC1) !=RESET)7 N& o2 x: Q8 q" |
- {
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- __HAL_TIM_CLEAR_IT(htim, TIM_IT_CC1);+ r( O& F# o5 H, F% u9 H' O
- htim->Channel = HAL_TIM_ACTIVE_CHANNEL_1;
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- /* Input capture event */# O, A/ w1 Q% J+ E+ i, u* H
- if((htim->Instance->CCMR1 & TIM_CCMR1_CC1S) != 0x00U)3 ^& G1 h/ B: r$ t, Y
- {
9 h! h1 _1 r0 U% x& u - HAL_TIM_IC_CaptureCallback(htim);" j& F2 P5 R, @5 i
- }
3 R2 c: Z9 f& C* w3 ^/ B2 l - /* Output compare event */
6 c, f$ E! ?8 S+ v. ] - else
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- HAL_TIM_OC_DelayElapsedCallback(htim);6 H2 j* J3 K `& e
- HAL_TIM_PWM_PulseFinishedCallback(htim);& t( O- p: S1 V& D7 V# l7 T% m1 U' o
- } u! u0 I+ R$ t" t2 s w
- htim->Channel = HAL_TIM_ACTIVE_CHANNEL_CLEARED;
$ \# R& x. I/ P - }- K* j& b. \' U; {% ]- x# q
- }+ T0 e5 J0 O5 b# e4 [
- }
( e& O. k7 `2 Z' u# g3 U% p+ L; J - /* Capture compare 2 event */) X% _: `6 p I8 u5 L6 _
- if(__HAL_TIM_GET_FLAG(htim, TIM_FLAG_CC2) != RESET)
& N/ {0 `& \1 T9 @% b# t - {. Z) s' c" ?# T: i4 K
- if(__HAL_TIM_GET_IT_SOURCE(htim, TIM_IT_CC2) !=RESET)" ?$ n, c% X! Y" v0 t, I
- {
; ~- `$ d- X( Q: y2 k# g/ c- c1 V - __HAL_TIM_CLEAR_IT(htim, TIM_IT_CC2);6 O" f* t r' V4 A
- htim->Channel = HAL_TIM_ACTIVE_CHANNEL_2;7 r3 _* d) w5 y& J1 \1 k0 ?
- /* Input capture event */
- p; E. I+ w: }, ? - if((htim->Instance->CCMR1 & TIM_CCMR1_CC2S) != 0x00U)
; l e5 [/ \8 _- q, R - {1 Y% C9 c5 f" P! r m$ R* ^/ q {3 Q
- HAL_TIM_IC_CaptureCallback(htim);! n1 f: r0 T2 a, P4 g8 B
- }8 j) p- X: k2 N0 ?
- /* Output compare event */
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- {3 B$ i2 d8 Z# Q( P5 {
- HAL_TIM_OC_DelayElapsedCallback(htim);) W+ b& ~8 \' A* V
- HAL_TIM_PWM_PulseFinishedCallback(htim);) k3 \% r- u7 l8 M2 F8 m. v. B
- }, Y, S1 X/ l$ z' t( C( m
- htim->Channel = HAL_TIM_ACTIVE_CHANNEL_CLEARED;
! B- q6 _$ T! v" ]$ N; M* { - }
; b) f2 l/ _# [; z - }- H$ J C/ o* M( M
- /* Capture compare 3 event */0 ^! y: T5 K" v$ {6 `! T
- if(__HAL_TIM_GET_FLAG(htim, TIM_FLAG_CC3) != RESET)
) ]% v V& L1 ~* C: u* J+ p1 [ - {; b7 x5 e; Z& R# T
- if(__HAL_TIM_GET_IT_SOURCE(htim, TIM_IT_CC3) !=RESET). |1 H- O1 {% m4 T
- {
" ^/ E5 d3 b; t+ q$ F* w - __HAL_TIM_CLEAR_IT(htim, TIM_IT_CC3);
! S7 X0 T) c- R - htim->Channel = HAL_TIM_ACTIVE_CHANNEL_3;4 I: K5 c, x+ }: l
- /* Input capture event */; G! j( d! p( k( e% q7 C
- if((htim->Instance->CCMR2 & TIM_CCMR2_CC3S) != 0x00U), a5 I& n9 j8 d( l- Y0 u% I
- {
3 F% G4 `! O u$ R3 j& G6 ] - HAL_TIM_IC_CaptureCallback(htim);, ?4 L0 `7 D6 y7 v6 L9 F
- }' [2 Z& f% J* p6 g( z8 t# F
- /* Output compare event */
' e A+ {* U' e, I, c) K, { - else4 K5 y: N/ V7 U) e6 \
- {
0 w1 t" x# q4 d9 G - HAL_TIM_OC_DelayElapsedCallback(htim);5 X( ~' z1 R0 r w2 \
- HAL_TIM_PWM_PulseFinishedCallback(htim);+ d2 h5 u# a6 S U( K
- }
! w( {; Z" }% T# q; @ - htim->Channel = HAL_TIM_ACTIVE_CHANNEL_CLEARED;
8 ^8 O# G7 U6 t# g' Y# V - }4 H6 {9 X4 h6 }/ D1 J* _1 x$ u
- }
/ k- P6 ~% D. @3 ?9 _ - /* Capture compare 4 event */
% Y( _+ R' f% R/ V0 H3 J - if(__HAL_TIM_GET_FLAG(htim, TIM_FLAG_CC4) != RESET)
8 W( }3 Z' W5 u) A& T$ N - {
# l$ x/ v! H6 `5 r - if(__HAL_TIM_GET_IT_SOURCE(htim, TIM_IT_CC4) !=RESET)
: U/ G1 C* j7 V, I# i* [ - {
% p$ F( O0 A2 a9 N - __HAL_TIM_CLEAR_IT(htim, TIM_IT_CC4);, a$ ? @5 R% u/ n8 y( A
- htim->Channel = HAL_TIM_ACTIVE_CHANNEL_4;
4 g) N7 X/ L. @9 B2 t - /* Input capture event */
/ C" g6 V4 r& l1 _4 s" B$ M8 f - if((htim->Instance->CCMR2 & TIM_CCMR2_CC4S) != 0x00U)
9 M7 E" `1 D. d, T - {
1 W* c5 k$ u; m0 B/ y3 p6 f - HAL_TIM_IC_CaptureCallback(htim);
% d! j* ]6 K# O - }" A, P" h! _! p4 P6 S; @; _
- /* Output compare event */+ m d& U$ z D& \8 M+ q3 v) w
- else
7 e: k& Q( B# [% h6 {. A& u - {, A3 \' ~" s: V: z. O2 ?
- HAL_TIM_OC_DelayElapsedCallback(htim);
/ p1 Y5 P" D6 x5 W# C) d: s - HAL_TIM_PWM_PulseFinishedCallback(htim);
6 ]% n5 K. ^5 q+ I/ O8 I3 W4 u% M4 w - }
% \0 a0 x0 m+ q; J# D - htim->Channel = HAL_TIM_ACTIVE_CHANNEL_CLEARED;5 L1 `1 Y( ]+ q; D$ r6 p7 l
- }0 K: W3 O: p% D7 c
- }) r. l; [1 C. O
- /* TIM Update event */. X9 @& z( |$ C
- if(__HAL_TIM_GET_FLAG(htim, TIM_FLAG_UPDATE) != RESET)6 R G! s; A$ E X4 ^. Q; N+ z1 L p- V
- {
, V, J4 V( P1 H j( e/ w N - if(__HAL_TIM_GET_IT_SOURCE(htim, TIM_IT_UPDATE) !=RESET)
, y! S, ~+ e" J' D6 z5 h/ a - {
. J8 j' O* j' e$ x- h: u0 J - __HAL_TIM_CLEAR_IT(htim, TIM_IT_UPDATE);: E3 p3 ]' }( m. ~. w) W
- HAL_TIM_PeriodElapsedCallback(htim);& O: R! Z5 e, u$ o5 `* z1 r- g
- }. J5 T, w# J% T% }" |2 y
- }
; q& p! X) X& @! o - /* TIM Break input event */
! t+ z$ w+ U) a# q' Q - if(__HAL_TIM_GET_FLAG(htim, TIM_FLAG_BREAK) != RESET)
* X( x/ D. g0 h5 m* F, @ - {
# M7 a0 w+ ]9 M - if(__HAL_TIM_GET_IT_SOURCE(htim, TIM_IT_BREAK) !=RESET)1 P5 i- \# q0 ?2 h1 T
- {" X3 q3 y2 ^, w- f. p* B+ r3 h M
- __HAL_TIM_CLEAR_IT(htim, TIM_IT_BREAK);9 x) g$ z7 I' k; {" y
- HAL_TIMEx_BreakCallback(htim);8 b: W0 O0 r: ^) `+ ?
- }
0 H* s c5 D+ B$ {- a - }) }, c1 i0 P3 z2 q+ J
- /* TIM Trigger detection event */
: a ~* F" k- Y) B% ?& F - if(__HAL_TIM_GET_FLAG(htim, TIM_FLAG_TRIGGER) != RESET)3 V# C0 P# G& q0 N
- {$ S# k! ^) W4 @4 L
- if(__HAL_TIM_GET_IT_SOURCE(htim, TIM_IT_TRIGGER) !=RESET)
2 D' I$ e" \+ n0 t, N! S - {
& n# o( \3 S5 O2 s* K9 d - __HAL_TIM_CLEAR_IT(htim, TIM_IT_TRIGGER);
" m9 q s7 r( W" d" D- z - HAL_TIM_TriggerCallback(htim);
$ _1 [) @ ]8 x( M - }
5 N/ P; J; Q! s! P) f - }
, c) Q4 h4 v/ @% t - /* TIM commutation event */
) s3 i+ `. q9 a - if(__HAL_TIM_GET_FLAG(htim, TIM_FLAG_COM) != RESET)
( R8 @: `2 y+ V; X' ], U( a - {
' |+ G5 R& [' g - if(__HAL_TIM_GET_IT_SOURCE(htim, TIM_IT_COM) !=RESET)
$ s4 B( P# c w* Q! G$ J% W - {
- Q5 Y( U T i7 @+ i4 U3 J - __HAL_TIM_CLEAR_IT(htim, TIM_FLAG_COM);% K6 v" J, k4 R3 q
- HAL_TIMEx_CommutationCallback(htim);/ S" E$ d0 K# m
- }2 g$ H0 m$ n/ p
- }2 `- _, `" e8 l/ z7 r$ A
- }
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* T# \- [) F# v1 S$ H( u7 X7 W4)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);0 j% ~/ `( B. r6 A1 N
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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
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+ p3 C/ X& f, F8 r' P+ y! L- void TIM14_IRQHandler(void)9 z6 s. t, k, Q+ h M3 ~9 g5 u# I
- {
8 x) W7 ]5 g9 n+ y - HAL_TIM_IRQHandler(&Input_Handle);
' S$ R* q+ b! k5 { - 7 H) v9 ?/ B3 t0 c0 I8 V
- //其他处理代码
& z/ ]1 w2 u; Z, i0 S! L - }
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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。
6 s$ [- ]5 r6 C; o) ^3 v- r( ?. i. K1 ?8 }& j: i
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。7 v! Q! e- V1 Y9 k7 c
0 a5 c8 u3 L5 y7 S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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: v4 [* A+ z; `) a6 x! G9)ken坑啊,都怪对库的执行sh顺序不了解。% I4 n. E4 g9 X% b4 x' p
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