基本计时功能
6 s' ?+ O4 d2 k }- V# H最简单的,定时器嘛,基本的定时器就是定时功能,简单来说就是TIMx->CNT会跟随着输入时钟的脉冲而计数。, _# c! }* R* @
初始化定时器的参数,大家都好理解,因为TIM2的输入时钟是108Mhz,这里进行10800分频,输入频率为10K,重装载值设置为20K,每2秒溢出一次。' I" A( y1 n( L# t+ I! ~' z
在HAL_TIM_Base_Init的执行过程中,会先调用HAL_TIM_Base_MspInit再进行其他参数的配置,即先开时钟。
: s' M* Z+ u8 H$ T- TIM_HandleTypeDef TIM2_Handler;
& ~# I7 ?, p3 q- \' a' w - static void MX_TIM2_Init(void)6 @, d- X g, {7 t) s$ d( }* n
- {- U$ J/ N" U! x2 P
- TIM2_Handler.Instance = TIM2;
& J( _+ u2 C9 \& `5 M3 z - TIM2_Handler.Init.Prescaler = 10800; j! E1 G' x$ s" e
- TIM2_Handler.Init.CounterMode = TIM_COUNTERMODE_UP;
' d. f5 |2 I N( }+ V# e1 N - TIM2_Handler.Init.Period = 20000;/ O- [3 R& J0 a" M' p+ S, v3 z
- TIM2_Handler.Init.ClockDivision = TIM_CLOCKDIVISION_DIV1;1 J" G2 S7 D+ H" h4 Y1 A
1 u) U7 [# n! ^# \. O- HAL_TIM_Base_Init(&TIM2_Handler);0 Q, f% s8 ?1 p0 Y0 ^# m
- HAL_TIM_Base_Start(&TIM2_Handler);5 g7 V! V3 ^% Z+ f+ O
- }
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- void HAL_TIM_Base_MspInit(TIM_HandleTypeDef *htim)3 e# @8 C$ n, o' t
- {$ |" J6 U# ]! Y+ J8 }
- __HAL_RCC_TIM2_CLK_ENABLE(); //使能TIM3时钟
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主函数中每秒打印一次定时器的值:
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- {! y$ J! Z3 H* G! h { B/ B
- printf("cnt:%d\r\n",TIM2->CNT);/ t6 l0 V' S! i h; F! Z
- delay_ms(1000);
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复制代码 显示效果如下:5 |2 l1 C+ G% G5 J# n9 c
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定时器中断- ~* T) c) V% }5 P& v# l& z: |. V
通过HAL_TIM_Base_Start可以开启基本计时功能,但要实现定时器中断功能,就需要开启相应的标志位,即使用HAL_TIM_Base_Start_IT进行定时的开启;. k2 c2 g X0 A" J1 y
在配置定时器之前,除了要开启时钟,还需要先设置中断优先级,和使能中断向量;" _( g6 q j3 Y% M1 H$ R
在定时器中断TIM2_IRQHandler服务函数中调用HAL库提供的定时器中断处理函数HAL_TIM_IRQHandler,解析到的定时器超时中断会自动跳转到HAL_TIM_PeriodElapsedCallback;
$ E1 r; b' k' ?5 ?7 d- TIM_HandleTypeDef TIM2_Handler;
1 Q" c9 _4 D3 k. _+ \& q' V9 _ - static void MX_TIM2_Init(void)
% l& K* T' S# {# i& k( K& w - {
. Q+ V3 d5 F. D$ ? - TIM2_Handler.Instance = TIM2;5 Y4 Q! B4 X- J% V) i" s
- TIM2_Handler.Init.Prescaler = 10800;4 y& W- e7 O. J/ \' z5 `* y1 _5 p( E
- TIM2_Handler.Init.CounterMode = TIM_COUNTERMODE_UP;
( R& D0 a8 d" w - TIM2_Handler.Init.Period = 20000;1 i5 x* L {9 Y
- TIM2_Handler.Init.ClockDivision = TIM_CLOCKDIVISION_DIV1;
8 I; O/ |% v7 Z - $ R g- l. u, b8 X
- HAL_TIM_Base_Init(&TIM2_Handler);
3 ~; f. i, f+ J. J - //HAL_TIM_Base_Start(&TIM2_Handler);4 A3 r. |9 ~$ u+ f& L
- HAL_TIM_Base_Start_IT(&TIM2_Handler);
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2 G% W! n% E; \" j: O7 e* P- void HAL_TIM_Base_MspInit(TIM_HandleTypeDef *htim)
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- __HAL_RCC_TIM2_CLK_ENABLE(); //使能TIM2时钟 J. f1 R( D+ y" ?% P. m
- HAL_NVIC_SetPriority(TIM2_IRQn, 1, 3); //设置中断优先级,抢占优先级1,子优先级3
$ k7 \$ d5 W% E+ z4 j. t - HAL_NVIC_EnableIRQ(TIM2_IRQn); //开启ITM2中断+ r- s, F5 o/ t1 F
- }
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- void TIM2_IRQHandler(void)$ G N5 ~/ S8 o0 P. _
- {# h, m1 X4 w, X# H% \
- HAL_TIM_IRQHandler(&TIM2_Handler);
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, c3 B3 r! b) l) ~5 L- void HAL_TIM_PeriodElapsedCallback(TIM_HandleTypeDef *htim)- O7 i6 J; y; v: V: S/ [
- {
; X; W: y7 P5 g! ^ - if (htim == (&TIM2_Handler))6 C$ q2 G9 E/ {2 w1 s
- {
$ S$ v( E8 ^+ k/ c* K" Y - printf("enter irq\r\n");
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- }4 d7 U; a, l% a y1 F4 q: }/ }
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复制代码
/ ? I: n4 w+ n7 J- \* Q& d$ ?) ?. o显示效果如下:
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PWM输出3 _! L8 J" t& p6 O# a
硬件PWM输出是不需要使用定时器中断的,但同样需要基本的定时参数配置,初始化也不再是使用HAL_TIM_Base_Init而是使用HAL_TIM_PWM_Init进行初始化了;
0 i# Z" {5 N/ P) `4 S* c配置完定时器为PWM模式,那么相应的输出通道也需要通过HAL_TIM_PWM_ConfigChannel进行配置;
0 a. `( _; ~2 s( C: o/ O* ^同样的启动也不是HAL_TIM_Base_Start或者HAL_TIM_Base_Start_IT了,而是HAL_TIM_PWM_Start了;( O+ L7 T& P# L+ b1 U( S- H/ c4 I' Z
- TIM_HandleTypeDef TIM2_Handler;
8 i- n/ \7 |$ x' b - TIM_OC_InitTypeDef TIM2_CH2Handler;
" A: ?3 Q! H7 ` - static void MX_TIM2_Init(void)
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- TIM2_Handler.Instance = TIM2;; R! U8 R% u$ n
- TIM2_Handler.Init.Prescaler = 10800;+ t# }; F6 G" F- a
- TIM2_Handler.Init.CounterMode = TIM_COUNTERMODE_UP; O9 m3 F, h, M) n: e
- TIM2_Handler.Init.Period = 20000;
+ r6 m& p1 p/ E( [" G! ^ - TIM2_Handler.Init.ClockDivision = TIM_CLOCKDIVISION_DIV1;5 s& q7 H3 J' J
- HAL_TIM_PWM_Init(&TIM2_Handler);, h7 U/ ?5 L& c. l6 l
- # q8 R, `1 T/ Y( G
- TIM2_CH2Handler.OCMode = TIM_OCMODE_PWM1;
" X; v0 L/ V7 L - TIM2_CH2Handler.Pulse = 10000;3 ?" ?. a; Y$ r4 F7 P9 V
- TIM2_CH2Handler.OCPolarity = TIM_OCPOLARITY_HIGH;( w2 P# Y! M0 H& U- g }. i% w
- TIM2_CH2Handler.OCFastMode = TIM_OCFAST_DISABLE;' S- n2 r! L/ L+ i8 q
- HAL_TIM_PWM_ConfigChannel(&TIM2_Handler, &TIM2_CH2Handler, TIM_CHANNEL_2) ;8 X1 U, }; Q( o, W4 I
, |; G9 L0 J/ r. u2 \- HAL_TIM_PWM_Start(&TIM2_Handler, TIM_CHANNEL_2); //开启PWM通道2
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- void HAL_TIM_PWM_MspInit(TIM_HandleTypeDef *htim)" {* k6 p9 [/ f6 I
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- GPIO_InitTypeDef GPIO_InitStruct = {0};
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1 T3 q' d& \6 k/ H0 m6 y! m5 k - __HAL_RCC_TIM2_CLK_ENABLE(); ( w' Z7 @8 c s \. @% S4 O. H
- __HAL_RCC_GPIOA_CLK_ENABLE();
1 T9 C: N! v+ k5 s; j/ k - GPIO_InitStruct.Pin = GPIO_PIN_1;
. ?# d: _! o% c4 Z/ E - GPIO_InitStruct.Mode = GPIO_MODE_AF_PP;
; W8 `; k4 n9 `3 R8 P - GPIO_InitStruct.Pull = GPIO_NOPULL;
% b/ z: Y: {9 B; U7 Q* q! i% u - GPIO_InitStruct.Speed = GPIO_SPEED_FREQ_LOW;7 g: T4 {' w$ y1 o! ~5 l
- GPIO_InitStruct.Alternate = GPIO_AF1_TIM2;
; L8 C, Q( \4 o" S M/ z/ t* |( o - HAL_GPIO_Init(GPIOA, &GPIO_InitStruct);
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通过万用表可以发现PA1口的电压在0和3.3V中大概每秒变动一次(疫情期间在家学习,没有示波器真是太惨了……为了确定确实有PWM波形,只能出此下策了T_T),串口打印数据如下:
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{8 R. B- D7 q2 s# m# Y8 _% hPWM + 定时器溢出中断, I8 j2 F& I0 A! r; }1 |! F0 [
我们都知道,PWM模式是在比较值处翻转,在溢出的时候再次翻转,而溢出的时候,我们也是可以产生中断的;所以同一个定时器,在这种定时时长和周期相同的时候,是可以即做硬件PWM输出,又做溢出中断的。
1 S5 ^5 W" d, h# Z这里我们观察一下两种初始化函数:. H4 \' n& Q6 J. B
- /**. `: t+ }1 r r" I
- * @brief Initializes the TIM Time base Unit according to the specified
8 j. z& {/ `, G* O - * parameters in the TIM_HandleTypeDef and create the associated handle.8 |& C/ r/ W( d
- * @param htim: pointer to a TIM_HandleTypeDef structure that contains
1 P) m8 D5 K) q0 j) H4 l - * the configuration information for TIM module.$ \0 a, m4 F* r8 Y& U6 |, J
- * @retval HAL status
; q0 K: K2 S: n - */
+ w, O% l" C" G7 [5 r0 ?! | - HAL_StatusTypeDef HAL_TIM_Base_Init(TIM_HandleTypeDef *htim)* ]4 ?" P- l( X. e: h/ c8 o7 `
- {
* Q( Z/ ~& |; A - /* Check the TIM handle allocation */
6 e' S* S8 R: O# D4 C$ N - if(htim == NULL)
" h8 n1 J3 s& D/ V+ T J9 B% C - {
* @+ b( k7 j) s! J- m - return HAL_ERROR;
) U# p6 j1 K) v! W - }
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- /* Check the parameters */# E" w! W3 N' ^
- assert_param(IS_TIM_INSTANCE(htim->Instance));
$ {; ~3 t- ]6 R4 ` - assert_param(IS_TIM_COUNTER_MODE(htim->Init.CounterMode));
# j: u7 E/ `6 I2 m" O: I - assert_param(IS_TIM_CLOCKDIVISION_DIV(htim->Init.ClockDivision));, @1 p; e9 O5 J' h$ f' H
-
8 G( Q& U) h6 l2 d% h - if(htim->State == HAL_TIM_STATE_RESET)
0 u5 U* ]5 @! W - { 6 ~, m7 {3 _7 R) ]
- /* Init the low level hardware : GPIO, CLOCK, NVIC */+ W0 {6 ^' U( X
- HAL_TIM_Base_MspInit(htim);
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- 1 y6 u) M' z* M/ k# \
- /* Set the TIM state */% p6 y, B1 G( N3 W3 w# a1 b4 Y0 X
- htim->State= HAL_TIM_STATE_BUSY;
- m, U- A0 j% w7 N* e8 C( n( K% v6 ^ -
; r: b$ y6 j5 j( P2 B8 z# r - /* Set the Time Base configuration */
0 v: d( m3 }$ T( o L& Z - TIM_Base_SetConfig(htim->Instance, &htim->Init);
0 S3 ]) g% p/ _0 I K- I - + S+ K3 Q" S# v. o# {
- /* Initialize the TIM state*/$ J* b( }5 X7 f/ F
- htim->State= HAL_TIM_STATE_READY;
2 b% Z, s8 w$ v+ ^0 m; R, \ -
( k9 w; B! W4 ~& P; g$ ?. i - return HAL_OK;2 t% z' s; Z0 d _! I6 r7 u
- }
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- / P8 A4 d& l! E: p: S% ~3 U
- HAL_StatusTypeDef HAL_TIM_PWM_Init(TIM_HandleTypeDef *htim)
- i3 q# O1 T3 w - {
1 K5 S3 |: M' c5 O0 h$ m1 } - /* Check the TIM handle allocation */
) Y6 q8 Y# ]: ^" t$ I1 ]) S7 R - if(htim == NULL) \+ Q; I/ _# n% j% y
- {3 E% `, D. _( n$ ^& i
- return HAL_ERROR;
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- * U! K9 w# ^4 A: `3 j9 a% `
- /* Check the parameters */: S' \# R! l4 {, @3 h4 i
- assert_param(IS_TIM_INSTANCE(htim->Instance));
1 k" p9 M' u! k& G2 U8 ~7 m( K" J - assert_param(IS_TIM_COUNTER_MODE(htim->Init.CounterMode));
5 W$ g% b$ v8 y2 _3 W; Z7 q7 t - assert_param(IS_TIM_CLOCKDIVISION_DIV(htim->Init.ClockDivision));
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( A: Y8 h' ]* [( g% V! o- if(htim->State == HAL_TIM_STATE_RESET)
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- /* Allocate lock resource and initialize it */1 g8 U$ {! t, ?0 {- C+ q# U
- htim->Lock = HAL_UNLOCKED;
2 U/ o& |1 ]2 ], ~9 @, i" } - /* Init the low level hardware : GPIO, CLOCK, NVIC and DMA */' t7 G: H6 d% b. A: Z9 |+ A1 p
- HAL_TIM_PWM_MspInit(htim);
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- /* Set the TIM state */
( u: N+ B6 U$ G - htim->State= HAL_TIM_STATE_BUSY;
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- /* Init the base time for the PWM */ 8 m/ A6 t0 w9 W$ P& A
- TIM_Base_SetConfig(htim->Instance, &htim->Init);
! E5 @# Z# m/ x1 L; C -
- C6 y4 \5 b W" o0 @7 Q - /* Initialize the TIM state*/
5 X" C% ?* K- V" P2 B6 a! u& Y: G - htim->State= HAL_TIM_STATE_READY;+ w1 Z" J1 ~* ~
- & u, d; S5 v, L' ]( X
- return HAL_OK;
# G0 ~/ X5 X6 y3 ]8 D - }
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复制代码 1 C7 |0 o5 ?! Q+ }4 @' u
两者除了底层的HAL_TIM_Base_MspInit和HAL_TIM_PWM_MspInit,其他地方一模一样,所以我们随便调用一个初始化就可以了,但是要注意,我们在HAL_TIM_Base_MspInit里配置了NVIC,在HAL_TIM_PWM_MspInit里配置了GPIO,所以只调用一个的话,必须手动把底层的粘贴到另一个函数里去,如果是想两个都调用一次,这里就需要考虑htim->State这个变量了,因为在调用了一次之后,其值就从HAL_TIM_STATE_RESET变成了HAL_TIM_STATE_READY,后面的一个就得不到执行了。
r3 K2 D* E \/ y- p; J2 B再来看启动代码:
7 z8 O% u: R5 m# s: l+ h- /**- G* q9 l8 F# s8 Z' m T- s4 K7 V
- * @brief Starts the TIM Base generation.
3 Q9 t* ]% W G. W) n, Z - * @param htim: pointer to a TIM_HandleTypeDef structure that contains
7 p- x$ G u f0 [4 h7 T, J. c$ S - * the configuration information for TIM module.9 d/ J" p- n8 i3 d5 P
- * @retval HAL status
- l) `$ n/ N9 x8 q0 A2 j# f - */
$ Y, F' E* S" m" `6 Y - HAL_StatusTypeDef HAL_TIM_Base_Start(TIM_HandleTypeDef *htim)8 x/ e% U( X3 V
- {
% z) ]: g8 w I" | - /* Check the parameters */
( k# S, B9 o: ^7 U7 z3 H @* w4 t - assert_param(IS_TIM_INSTANCE(htim->Instance));
+ E; n1 T' i [2 [" _$ s. ~+ Y -
2 ~9 X4 M, L9 B9 f1 M! m3 E - /* Set the TIM state */
3 }' J' X3 o8 U% i& F4 W6 Y - htim->State= HAL_TIM_STATE_BUSY;
" Y5 k: T6 a7 z& f2 v2 {8 o -
8 Q: r* x2 p1 r4 G& g; O - /* Enable the Peripheral */- T3 C& _* w) k
- __HAL_TIM_ENABLE(htim);; \. ?! X9 ?, l1 U# ]! b
- ; L1 ~( L9 E) U8 y
- /* Change the TIM state*/- F# L& v: y; b; C* c! U8 w
- htim->State= HAL_TIM_STATE_READY;
& c9 ]! o/ `) C9 B -
% I& _/ y: f/ Z$ q - /* Return function status */
- E' h1 G8 G* O3 r - return HAL_OK;
4 ?% S# x5 R. O, K6 n - }
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/ U: I( D9 ?8 b. D0 t- /**, ^) N8 S! d, h- E! t) Z
- * @brief Starts the TIM Base generation in interrupt mode.$ L. B# v( ^: G
- * @param htim: pointer to a TIM_HandleTypeDef structure that contains
, g, L |% `$ ^, z1 g - * the configuration information for TIM module.
; C) Q# G) F! F2 z+ _6 { - * @retval HAL status
# B# j6 }7 {8 [ - */
5 ]% [8 e+ R8 |0 H L. W9 F6 r - HAL_StatusTypeDef HAL_TIM_Base_Start_IT(TIM_HandleTypeDef *htim)1 Q, @+ y- g' |' f# `
- {9 [& J; m/ { g% j6 j/ I
- /* Check the parameters */) j& @" I$ L5 `6 |2 e
- assert_param(IS_TIM_INSTANCE(htim->Instance));" o9 s/ _2 c P; q6 [
-
" E: D6 X5 o3 C* E - /* Enable the TIM Update interrupt */! G8 p+ c f# n" G: M* H
- __HAL_TIM_ENABLE_IT(htim, TIM_IT_UPDATE);
# c4 [4 \: i' v [! Q( L' \* r: h6 ? -
6 l8 v8 Q5 V9 O% T8 T5 w& _ - /* Enable the Peripheral */( ?" n7 f! m; }# M% C7 b( |5 y6 B
- __HAL_TIM_ENABLE(htim);
9 v1 [* u: L( q' Y - $ S% D- n3 s% g ^& e( \# O
- /* Return function status */
$ _! M* B6 x3 Q' v. R$ j# N - return HAL_OK;
; E( K S3 ^1 G: O# [$ {% l& G - }
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I( b- j! x+ p2 w+ r; L P- /**$ O, i H' {: C U3 v
- * @brief Starts the PWM signal generation.
) }+ T* I7 s2 u$ [9 ~ c - * @param htim: pointer to a TIM_HandleTypeDef structure that contains
% |/ w2 }! J6 V; Q( ]& e - * the configuration information for TIM module.% n% ~8 m3 D9 X
- * @param Channel: TIM Channels to be enabled.
$ E" `0 |' |: j" F' c: s0 G - * This parameter can be one of the following values:
8 p% u, }3 N, V0 R" o) q - * @arg TIM_CHANNEL_1: TIM Channel 1 selected
$ p+ o; a2 |' `# b! M) S - * @arg TIM_CHANNEL_2: TIM Channel 2 selected$ a# i- {6 _: d$ [- h# { W
- * @arg TIM_CHANNEL_3: TIM Channel 3 selected
) h# A- R/ F' d" p a: v! i - * @arg TIM_CHANNEL_4: TIM Channel 4 selected
4 ?$ y0 w' k5 j9 W% ]2 z1 j7 W" _; r - * @retval HAL status
2 W" [1 e, t4 ` - */& P+ N0 @$ x2 i" W( `
- HAL_StatusTypeDef HAL_TIM_PWM_Start(TIM_HandleTypeDef *htim, uint32_t Channel), A$ y% m' x+ f4 d4 _3 e) L- D
- {
6 A. Y. M5 n% P" q2 W7 ~ - /* Check the parameters */
" j- l1 h, }5 f! {; }$ w2 W5 @: q - assert_param(IS_TIM_CCX_INSTANCE(htim->Instance, Channel));
r) k# [; N# G8 g - 9 Z- P/ C$ `+ y6 m/ q
- /* Enable the Capture compare channel */
7 Z* K& U, {; Q( W. R: N8 l - TIM_CCxChannelCmd(htim->Instance, Channel, TIM_CCx_ENABLE);: J. w% M" b3 Z! A2 W- h
- 9 v( C* ?" V, n2 g
- if(IS_TIM_ADVANCED_INSTANCE(htim->Instance) != RESET)
/ u4 ^+ m7 h; X2 r! f, m# d2 V6 m - {( M- Q; Y' A7 N- o' E
- /* Enable the main output */; P6 ~( T( Y3 a2 T% V9 I) b0 y' ?
- __HAL_TIM_MOE_ENABLE(htim);" c) V {2 z# g
- }
; n$ D) z* Y! h7 S -
+ W1 E8 D2 z y% f$ y - /* Enable the Peripheral */
9 p* n% h7 ]( B" m+ x: n r - __HAL_TIM_ENABLE(htim);! J) l4 q: p' E7 @
- $ Y' P3 J/ ~0 t
- /* Return function status */- P: ] E4 p/ U# Q4 G0 `4 A5 |1 O Q
- return HAL_OK;- \4 }9 r+ {2 j/ X: z1 x {/ @( \
- } + p, P( A/ N4 x" T, d6 M! z8 R
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其中的核心代码分别是:
, M, v$ k; D+ q5 i L- __HAL_TIM_ENABLE(htim);0 a. X1 T$ L8 K2 V8 b1 x
复制代码- __HAL_TIM_ENABLE_IT(htim, TIM_IT_UPDATE);
8 w: L" L7 G+ r9 \& G2 K - __HAL_TIM_ENABLE(htim);
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复制代码- TIM_CCxChannelCmd(htim->Instance, Channel, TIM_CCx_ENABLE);$ N4 t' j5 G% w) R
- __HAL_TIM_ENABLE(htim);
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! f0 ~3 F( y9 ^1 X, i那么我们可以不用hal库提供给我们的启动函数,直接写三句话,就实现了定时器中断+PWM功能了。
' k4 K5 {! H& d( e5 | E- __HAL_TIM_ENABLE_IT(htim, TIM_IT_UPDATE);. y K* t4 c- p# C7 G
- TIM_CCxChannelCmd(htim->Instance, Channel, TIM_CCx_ENABLE);
* Q6 A8 Y' {7 C9 L - __HAL_TIM_ENABLE(htim);- s$ T) p7 D5 s
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完整代码如下:7 {7 r; T3 O/ M' \
- TIM_HandleTypeDef TIM2_Handler;( ^2 } j* X' p4 Q
- TIM_OC_InitTypeDef TIM2_CH2Handler;8 f' j; U7 c9 I
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$ c" Q; ^" L& I/ y- F4 K5 S- static void MX_TIM2_Init(void)
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- __HAL_RCC_TIM2_CLK_ENABLE();7 B/ j) e$ V. p. p: U
- HAL_NVIC_SetPriority(TIM2_IRQn, 1, 3);! V2 @+ X( t9 m
- HAL_NVIC_EnableIRQ(TIM2_IRQn);4 m5 m6 {: C# r. V1 `& O5 m
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- TIM2_Handler.Instance = TIM2;0 O* N; I' }% y
- TIM2_Handler.Init.Prescaler = 10800;) v4 p: r s8 z7 N
- TIM2_Handler.Init.CounterMode = TIM_COUNTERMODE_UP;0 {+ q1 L7 f3 B
- TIM2_Handler.Init.Period = 20000;
& O" S# C8 F3 z& U - TIM2_Handler.Init.ClockDivision = TIM_CLOCKDIVISION_DIV1;' I: O E+ l( ]! l
-
3 k9 o# g0 |' `9 s9 U1 P# L - HAL_TIM_PWM_Init(&TIM2_Handler);
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- TIM2_CH2Handler.OCMode = TIM_OCMODE_PWM1;
- G3 Q% K9 u2 F! |, r% S - TIM2_CH2Handler.Pulse = 10000;- e& s1 [9 W" Z
- TIM2_CH2Handler.OCPolarity = TIM_OCPOLARITY_HIGH;7 v5 a) V [' F' r. u- X
- TIM2_CH2Handler.OCFastMode = TIM_OCFAST_DISABLE;
. ~" ^2 l- @1 z' J5 W: @ - HAL_TIM_PWM_ConfigChannel(&TIM2_Handler, &TIM2_CH2Handler, TIM_CHANNEL_2) ;
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- __HAL_TIM_ENABLE_IT(&TIM2_Handler, TIM_IT_UPDATE);
8 T* ]& n* L% u) c - TIM_CCxChannelCmd(TIM2_Handler.Instance, TIM_CHANNEL_2, TIM_CCx_ENABLE);4 E, i/ |. p$ C& \$ V8 M1 A
- __HAL_TIM_ENABLE(&TIM2_Handler);
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- 6 X; w8 V( }" c4 q6 ]
- void TIM2_IRQHandler(void)
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1 ?& }1 a+ v* v5 X6 W) ] - HAL_TIM_IRQHandler(&TIM2_Handler);
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- void HAL_TIM_PeriodElapsedCallback(TIM_HandleTypeDef *htim)
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- if (htim == (&TIM2_Handler)), d# y% u! T8 J: h a
- {
8 g# d. F T6 g0 Y( B/ ^ - printf("enter irq\r\n");
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8 D0 Z! M) y+ ^9 W" ^- void HAL_TIM_PWM_MspInit(TIM_HandleTypeDef *htim)
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- GPIO_InitTypeDef GPIO_InitStruct = {0};1 g( d7 H2 }. b5 j6 K1 k
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- __HAL_RCC_TIM2_CLK_ENABLE();4 B5 e% S0 F! O7 ]. i. V
- __HAL_RCC_GPIOA_CLK_ENABLE();
. ~( |# G- q" B8 a& ^ - GPIO_InitStruct.Pin = GPIO_PIN_1;9 |7 q0 r- D5 V; p* X4 U6 V
- GPIO_InitStruct.Mode = GPIO_MODE_AF_PP;
' S1 C' ^6 H% a9 j. x - GPIO_InitStruct.Pull = GPIO_NOPULL;/ @. C# V9 c# i, F1 T
- GPIO_InitStruct.Speed = GPIO_SPEED_FREQ_LOW;
* a- ^$ o2 s. L6 P' ~ - GPIO_InitStruct.Alternate = GPIO_AF1_TIM2;8 t A9 L; U+ z- @
- HAL_GPIO_Init(GPIOA, &GPIO_InitStruct);$ x( Z0 Q; V/ L% U
- }
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