此篇博客记录的是自己通过CubeMX学习F7系列定时器功能的过程,献给有过标准库开发经验的同学。
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. ^& z; z6 ^& f( ?; J ^基本计时功能
/ g# L/ E9 L! J& [& g5 f/ p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。
8 b: L; a; @2 H& G# F6 C- \* |4 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。
' y; o% ~% [! p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。/ v4 |3 x' h' X+ T W/ ?6 m
) x8 ^0 T9 u' \5 v. Y; s- TIM_HandleTypeDef TIM2_Handler;
6 k7 }! R6 d- t - static void MX_TIM2_Init(void)6 B2 G j) N1 I5 f/ j
- {, N* V2 S7 I4 t: Q
- TIM2_Handler.Instance = TIM2;
, F! e9 d$ y5 X6 B: }7 f - TIM2_Handler.Init.Prescaler = 10800;# A7 D( d8 a5 M/ I1 y0 y
- TIM2_Handler.Init.CounterMode = TIM_COUNTERMODE_UP;5 {8 U, k6 }9 [- _
- TIM2_Handler.Init.Period = 20000;4 N- w# K! B+ W8 y$ A( G
- TIM2_Handler.Init.ClockDivision = TIM_CLOCKDIVISION_DIV1;! o4 s# X- z- B7 Y6 I
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- HAL_TIM_Base_Init(&TIM2_Handler);
5 _# w: J d0 B, E3 Z W - HAL_TIM_Base_Start(&TIM2_Handler);4 G! i3 D; [- u& f1 B+ `
- }
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- void HAL_TIM_Base_MspInit(TIM_HandleTypeDef *htim)
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- __HAL_RCC_TIM2_CLK_ENABLE(); //使能TIM3时钟 . D. @) y# d) R+ e0 e; w: i* t
- }
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主函数中每秒打印一次定时器的值:, s$ K, c4 M' n1 u, V: |4 M
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- while (1)
: u2 o3 I9 d& C: ? z% Z* R, L% H: } - {
4 ^9 x {3 Q; B) u8 S - printf("cnt:%d\r\n",TIM2->CNT);
. X, G0 @3 S5 N5 ~ - delay_ms(1000);: g3 g; g/ e" Q: N
- }
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8 j1 m2 p/ U) i显示效果如下:; h2 Z- O! g, l$ V% ~
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) e7 f2 `, ^& |+ f定时器中断. L! l( x2 X1 G) I: F, `6 `6 L
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;
8 ~* D* i; l" L" r) |+ b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;
- @% G! [; b8 W3 Z. D1 e i" r1 E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;* p$ _$ J1 n d9 m, t7 n% R
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- TIM_HandleTypeDef TIM2_Handler;7 N& Q, j7 W& \5 N- `8 \
- static void MX_TIM2_Init(void)8 `% X/ M. q! s# @- ~
- {- d+ y( M r9 I ?
- TIM2_Handler.Instance = TIM2;
6 p# z( t) e; L4 | - TIM2_Handler.Init.Prescaler = 10800;( c+ ~! ]" Z6 ?5 d+ }
- TIM2_Handler.Init.CounterMode = TIM_COUNTERMODE_UP;; w( P! e, Q) G9 O6 S6 |( U6 L
- TIM2_Handler.Init.Period = 20000;" g" U3 b( D/ G2 V
- TIM2_Handler.Init.ClockDivision = TIM_CLOCKDIVISION_DIV1;, g8 T7 ?" j0 p4 V
' J1 l9 ~3 V f% X" r; S: |. Y# H- HAL_TIM_Base_Init(&TIM2_Handler);
! w0 g6 {0 N1 k7 Q5 p/ h1 x - //HAL_TIM_Base_Start(&TIM2_Handler);' V2 q$ j4 D: v
- HAL_TIM_Base_Start_IT(&TIM2_Handler);5 s/ K; @: X+ W( {+ b2 u: z
- }' [2 V! g/ u2 X) l! b4 F
/ Y3 a% |$ t4 z- void HAL_TIM_Base_MspInit(TIM_HandleTypeDef *htim)+ N4 C' j" Z9 u8 K5 n
- {
3 R& U: ]8 E2 B - __HAL_RCC_TIM2_CLK_ENABLE(); //使能TIM2时钟
8 t% }/ D2 C7 } - 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$ M0 o; I; s+ W3 G# N. _
- HAL_NVIC_EnableIRQ(TIM2_IRQn); //开启ITM2中断
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- void TIM2_IRQHandler(void)* @# Q7 ?# m( h# B% d
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- HAL_TIM_IRQHandler(&TIM2_Handler);
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- void HAL_TIM_PeriodElapsedCallback(TIM_HandleTypeDef *htim)! N( L- i7 t0 S
- {7 u# f# T4 Q: n/ x6 V" `0 j
- if (htim == (&TIM2_Handler))* H' \! m k+ g6 l- ?+ s1 A
- {# B& I7 B: o! [) C3 `( t1 v
- printf("enter irq\r\n");) j, g8 h% E: p: h. k
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显示效果如下:
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PWM输出* L8 `% W2 @5 _
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;9 i E$ t: Z3 N7 u$ v+ t$ N
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;- D3 H' B J! k$ D& ]+ k; i* C
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;
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- TIM_HandleTypeDef TIM2_Handler;
3 p7 y3 [4 u7 ? - TIM_OC_InitTypeDef TIM2_CH2Handler;
' P W9 U, Q5 @ Q% E - static void MX_TIM2_Init(void)* M5 B; |% p* Z/ @! F& o
- {
& {4 y+ D: d" }0 H8 X" C4 l - TIM2_Handler.Instance = TIM2;' w1 v4 P( b' w5 \
- TIM2_Handler.Init.Prescaler = 10800;
* U, D& y* j) X$ y/ _& p6 @7 w2 b: D - TIM2_Handler.Init.CounterMode = TIM_COUNTERMODE_UP;
# A' {, \6 b$ E$ ` - TIM2_Handler.Init.Period = 20000;4 T" ?, }5 [0 q6 c. U0 A: ^7 r; m
- TIM2_Handler.Init.ClockDivision = TIM_CLOCKDIVISION_DIV1;
6 A4 d, K0 @! z. g, [ - HAL_TIM_PWM_Init(&TIM2_Handler);
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- TIM2_CH2Handler.OCMode = TIM_OCMODE_PWM1;1 {/ u3 _. v9 R' o& R+ \$ a
- TIM2_CH2Handler.Pulse = 10000;7 U# {* a3 S, ]. X
- TIM2_CH2Handler.OCPolarity = TIM_OCPOLARITY_HIGH;
' v* f0 j, m' w - TIM2_CH2Handler.OCFastMode = TIM_OCFAST_DISABLE;
- ^7 T) f0 S4 b% @4 y% `2 w - HAL_TIM_PWM_ConfigChannel(&TIM2_Handler, &TIM2_CH2Handler, TIM_CHANNEL_2) ;
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- HAL_TIM_PWM_Start(&TIM2_Handler, TIM_CHANNEL_2); //开启PWM通道26 b; J. g5 F+ a
- }
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- void HAL_TIM_PWM_MspInit(TIM_HandleTypeDef *htim)- g# M4 j1 Z* z& q
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- GPIO_InitTypeDef GPIO_InitStruct = {0};
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- __HAL_RCC_TIM2_CLK_ENABLE(); , V$ x- b6 h! N2 B
- __HAL_RCC_GPIOA_CLK_ENABLE();( `9 _3 r! q' V
- GPIO_InitStruct.Pin = GPIO_PIN_1;
: V; j! Z# j0 c9 G/ N - GPIO_InitStruct.Mode = GPIO_MODE_AF_PP;( S$ E: X1 Q7 z6 h! X/ D; ?" \
- GPIO_InitStruct.Pull = GPIO_NOPULL;
- O; B7 ~' A0 r- i- t - GPIO_InitStruct.Speed = GPIO_SPEED_FREQ_LOW;
, m5 c. Y2 F! b7 U$ y; ] - GPIO_InitStruct.Alternate = GPIO_AF1_TIM2;
0 J9 G3 Z$ {1 v$ b v/ M% D* Y - HAL_GPIO_Init(GPIOA, &GPIO_InitStruct);
( F& l O3 ~+ N/ ?0 y - }
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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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PWM + 定时器溢出中断0 w9 N% t3 l) k5 o5 Q# T1 ?
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。7 f$ E" V* u. K; n4 {
这里我们观察一下两种初始化函数:
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9 [' a% w! [. o j: I- /**
. } w! _% R- f3 e8 |/ r4 c- E- ?( f - * @brief Initializes the TIM Time base Unit according to the specified
: y5 O" V, m6 _% l& N0 C: U - * parameters in the TIM_HandleTypeDef and create the associated handle.* H! Q( u: Z% X" r; C3 H, U# P
- * @param htim: pointer to a TIM_HandleTypeDef structure that contains
, A6 G! E- n% [/ A3 h - * the configuration information for TIM module.
' p7 ], z G1 ~7 @/ [ - * @retval HAL status/ J/ O$ X H* M& e6 m
- */
% o& \4 i0 S' i$ ~ - HAL_StatusTypeDef HAL_TIM_Base_Init(TIM_HandleTypeDef *htim)' Q$ l/ a( V& W8 q
- {
% [ C, b( P( d8 r* q& W - /* Check the TIM handle allocation */0 b7 g" F: }/ m% p8 y7 s- `: u8 N
- if(htim == NULL)
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- return HAL_ERROR;
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: m X4 N$ ?; i, s, D, i" O2 W- /* Check the parameters */& i1 T2 i7 C$ e; l/ E! E
- assert_param(IS_TIM_INSTANCE(htim->Instance));
* C( @0 ? N& ?5 |$ M- { - assert_param(IS_TIM_COUNTER_MODE(htim->Init.CounterMode));
* v' B- S- j7 v6 `: o" t - assert_param(IS_TIM_CLOCKDIVISION_DIV(htim->Init.ClockDivision));$ ^& z8 B) {& f: g
6 E3 @2 e* F/ N- if(htim->State == HAL_TIM_STATE_RESET), _* Y% D$ w/ Z! k+ o8 C: t, a& h
- {
7 s Z( @4 H. F6 E5 T3 k) L - /* Init the low level hardware : GPIO, CLOCK, NVIC */
' r4 q) L( w! P0 O$ B: e2 R$ L - HAL_TIM_Base_MspInit(htim);
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- /* Set the TIM state */* T l2 m* J. ?0 O0 P2 U
- htim->State= HAL_TIM_STATE_BUSY;
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- S- F: z* h; q% d- /* Set the Time Base configuration */# p4 W5 r! _6 G; n) }- Y: M* s- I* A
- TIM_Base_SetConfig(htim->Instance, &htim->Init);
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- /* Initialize the TIM state*/
( M; g3 f7 i$ J- l$ T - htim->State= HAL_TIM_STATE_READY;7 S5 N8 I2 }7 u' w( q& K+ z
- u, E; ^, }2 K! G5 {$ T- return HAL_OK;, p! E) G* T# v- G+ A3 e7 o9 M
- }
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. e8 m5 A2 h1 V2 k- ?- HAL_StatusTypeDef HAL_TIM_PWM_Init(TIM_HandleTypeDef *htim)
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- /* Check the TIM handle allocation */
3 V$ v* q" w3 G' B9 Z - if(htim == NULL)# j; `2 z/ H3 g6 `( |
- {
, Y" }' s5 C$ T6 e9 V% J: K - return HAL_ERROR;
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) K2 `. F0 M% ~' Y' @- /* Check the parameters */& Z7 A8 Y# a) d: b
- assert_param(IS_TIM_INSTANCE(htim->Instance));
$ L9 s$ o7 `$ |9 |2 l - assert_param(IS_TIM_COUNTER_MODE(htim->Init.CounterMode));
' g" S" k3 r, d7 w/ @0 e - assert_param(IS_TIM_CLOCKDIVISION_DIV(htim->Init.ClockDivision));
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- if(htim->State == HAL_TIM_STATE_RESET)* S6 n7 O# u: V9 g8 M5 s
- {
9 l$ S8 e* ^2 j' c/ l4 _0 g6 M6 R - /* Allocate lock resource and initialize it */: Y# ~& X+ m* t8 g' p1 B
- htim->Lock = HAL_UNLOCKED;
6 A* x u( ^, B, H) ~( [2 B - /* Init the low level hardware : GPIO, CLOCK, NVIC and DMA */ V e# L, [9 k- W2 R
- HAL_TIM_PWM_MspInit(htim);! V: F$ w5 Z3 A0 W a, F
- }
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- /* Set the TIM state */
9 e' n0 u3 c' ^" k - htim->State= HAL_TIM_STATE_BUSY;
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- /* Init the base time for the PWM */
4 @3 x6 p! w- ^, ^ M* G: o1 T - TIM_Base_SetConfig(htim->Instance, &htim->Init); * N3 E$ |/ z( ~0 I* u1 ~' i1 _
6 f* f1 y g% t4 N) x- /* Initialize the TIM state*// M5 J8 x3 n; H9 C; ]3 R0 J# y
- htim->State= HAL_TIM_STATE_READY;% u( `! j8 S u T3 Q3 U
, c% W6 N! B$ k- return HAL_OK;5 W3 l4 X' o, u: m& Q
- }
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- _# Z3 V1 Y( X2 w5 s4 {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。
( n9 H; o7 j% }再来看启动代码:1 {9 ^$ i* e. F7 B) g$ r: _0 \
$ r7 d0 Q! ^/ `$ h( O' K+ J- /**6 U5 j: U$ n- L1 l
- * @brief Starts the TIM Base generation.2 [, j9 b6 u8 `+ v" h- {2 y% }
- * @param htim: pointer to a TIM_HandleTypeDef structure that contains
& F: k2 {" E. D/ G4 ~) t; V - * the configuration information for TIM module.
) _% `3 P& ?* s0 x5 k) ? R# i9 U - * @retval HAL status0 p3 o; p2 x+ J& f& ^
- */
0 R' ^* q H* v. q& ?8 a6 ?7 \ - HAL_StatusTypeDef HAL_TIM_Base_Start(TIM_HandleTypeDef *htim)
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- /* Check the parameters */
) c: X% ~7 o7 h* K - assert_param(IS_TIM_INSTANCE(htim->Instance));
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- /* Set the TIM state */) \) h# b1 L3 K t+ ?5 H& L
- htim->State= HAL_TIM_STATE_BUSY;0 B' |9 K0 @4 i+ g/ _2 V8 ]: Y
! f& p& @% ?+ }5 y+ T8 P$ B, Y- /* Enable the Peripheral */
" Y# ~3 J: Q& |& m; _ - __HAL_TIM_ENABLE(htim);
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$ q2 p0 k, _/ ]8 R7 c- /* Change the TIM state*/
' Q8 z# p+ p' h9 J! K! M0 j - htim->State= HAL_TIM_STATE_READY;, L# v2 @$ s4 c% X: [
- 7 |! n* a3 W9 Z! J, I
- /* Return function status */
9 B7 @4 A8 _; U, ~& w# [2 x - return HAL_OK;% E. d+ J( H3 o% x# l! O% k k
- }
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& y$ P! l5 e4 `1 T2 O5 J2 P- - g* R; J3 _% e8 L8 }2 ?
- /**
$ Q! f0 S) b: |6 M: B - * @brief Starts the TIM Base generation in interrupt mode.
" Y- F+ v3 [+ g - * @param htim: pointer to a TIM_HandleTypeDef structure that contains
& ?. |! J4 p+ j9 d3 h - * the configuration information for TIM module.
( R+ ^+ P, y! D3 A- V - * @retval HAL status
" R) _3 d" w! D1 S3 C - */( o# I( j5 I$ a+ x
- HAL_StatusTypeDef HAL_TIM_Base_Start_IT(TIM_HandleTypeDef *htim)$ K! _8 M) ?8 K0 a; Q3 T
- {
Q2 }/ ]- }# d7 B9 M6 w; r- k" q - /* Check the parameters */8 T. H0 [9 d7 {0 H6 y
- assert_param(IS_TIM_INSTANCE(htim->Instance));, F: a3 l% v% g% t
- 5 x o. m( ?* N) e
- /* Enable the TIM Update interrupt */& [1 s/ |6 s* T8 z/ ?$ q
- __HAL_TIM_ENABLE_IT(htim, TIM_IT_UPDATE);$ }" `- Z$ D8 Q( X% V
- , }) P' I& m( t% u
- /* Enable the Peripheral */
# t( z' ]; y$ M' y9 n) C3 A - __HAL_TIM_ENABLE(htim);( N5 X X; @, v. a0 v
* y1 G7 `; F7 D- /* Return function status */
5 J' [1 f7 }. L' g1 F1 e - return HAL_OK;! p+ V- `; P% r
- }
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) g3 B+ |/ P2 v4 w- /**
: \9 I) z7 s8 M - * @brief Starts the PWM signal generation.
8 B) H: ?" U+ a7 b+ a, [ - * @param htim: pointer to a TIM_HandleTypeDef structure that contains( U( C/ t7 b, a4 \
- * the configuration information for TIM module.
2 r |' \. {+ k3 T" F& ?. e/ ]6 ? - * @param Channel: TIM Channels to be enabled.) |; o8 ?" r( I$ P8 x1 ~
- * This parameter can be one of the following values:
4 z# ^* V# [: p9 ~4 G( c - * @arg TIM_CHANNEL_1: TIM Channel 1 selected+ U a. A: w/ ~, \
- * @arg TIM_CHANNEL_2: TIM Channel 2 selected4 j2 q9 G$ ]8 ]' f- B. L
- * @arg TIM_CHANNEL_3: TIM Channel 3 selected
$ o3 J* K) J0 B$ N - * @arg TIM_CHANNEL_4: TIM Channel 4 selected
3 j. \2 g5 H0 z, R# d; W) y - * @retval HAL status/ g3 h2 t3 f" E: ~+ o" @
- */
" a3 J# j3 ~3 I7 m6 v+ q3 l - HAL_StatusTypeDef HAL_TIM_PWM_Start(TIM_HandleTypeDef *htim, uint32_t Channel)
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- /* Check the parameters */4 O" C' A! }, x% p
- assert_param(IS_TIM_CCX_INSTANCE(htim->Instance, Channel));. N# z/ X* I) K0 C7 o' s
6 l) v6 M- i' [' `. p% I* M- /* Enable the Capture compare channel */
* B* b1 L$ s+ x3 A5 z - TIM_CCxChannelCmd(htim->Instance, Channel, TIM_CCx_ENABLE);6 y/ s5 Z# z' }1 i! Z/ L
. f, A8 ^0 K7 q! _' y* A- if(IS_TIM_ADVANCED_INSTANCE(htim->Instance) != RESET)
! k2 T5 U5 ?' k q$ B. @& ~ - {
2 f3 `, c4 u( D; O7 K$ V3 p7 N \ - /* Enable the main output */
( D% [6 J# A9 ? C. I" q9 d - __HAL_TIM_MOE_ENABLE(htim);
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' R$ r" t0 ^% p$ e+ E8 K: o- /* Enable the Peripheral */
0 s7 Q+ E9 y7 P* |& X! i - __HAL_TIM_ENABLE(htim);. ?$ s3 L, v) ~5 B$ C, Y
- ! _) R8 M) P9 R; @* N* G
- /* Return function status */2 j2 {$ D! _, j% A/ a9 j
- return HAL_OK;
% h0 `; f, `" H - }
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其中的核心代码分别是:% k8 ^$ p* s5 R2 h- R
3 ^0 s# [: U w, L1 X- __HAL_TIM_ENABLE_IT(htim, TIM_IT_UPDATE);# S8 p- ?" O# ^ Q8 |
- __HAL_TIM_ENABLE(htim);
复制代码- TIM_CCxChannelCmd(htim->Instance, Channel, TIM_CCx_ENABLE);
' U& C! r5 {5 C8 }" p: g - __HAL_TIM_ENABLE(htim);
复制代码 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。
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9 [( Z; L ^. p/ M, B1 @9 V- __HAL_TIM_ENABLE_IT(htim, TIM_IT_UPDATE);4 f! T j- W6 a. `4 K( {
- TIM_CCxChannelCmd(htim->Instance, Channel, TIM_CCx_ENABLE);) j) [! V5 c$ m: ~# W; @& ^4 |# P
- __HAL_TIM_ENABLE(htim);
复制代码
3 k0 i# J7 `, X9 v& i# s2 B( o完整代码如下:; A( k& G5 j* {4 u4 m1 z
- t, P9 A: t8 P, n- TIM_HandleTypeDef TIM2_Handler;
2 Q- U. A8 w3 T2 } E - TIM_OC_InitTypeDef TIM2_CH2Handler;* l% a; ~9 y* i1 c, b
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2 A' M0 ^: F/ r/ w- static void MX_TIM2_Init(void)
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- __HAL_RCC_TIM2_CLK_ENABLE();
7 Y* O/ \+ n! ~0 L" W* R/ h - HAL_NVIC_SetPriority(TIM2_IRQn, 1, 3);" i* b; X7 H% T. ^$ t$ R
- HAL_NVIC_EnableIRQ(TIM2_IRQn);
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- TIM2_Handler.Instance = TIM2;4 q3 m" H3 p; ^6 i- \, b
- TIM2_Handler.Init.Prescaler = 10800;
& i5 W" v- L2 Z4 K$ X4 J5 e - TIM2_Handler.Init.CounterMode = TIM_COUNTERMODE_UP;* y8 y1 Q4 t& E+ l/ G& J
- TIM2_Handler.Init.Period = 20000;& a- U4 d: f6 h: g. Z5 e( x* f
- TIM2_Handler.Init.ClockDivision = TIM_CLOCKDIVISION_DIV1;; A! Q( x+ U0 T' z
9 b% y' C- S; Y2 U- HAL_TIM_PWM_Init(&TIM2_Handler);+ z8 T4 `. I |/ F
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- TIM2_CH2Handler.OCMode = TIM_OCMODE_PWM1;
9 I, I: f; @* H% Z) J% t( J - TIM2_CH2Handler.Pulse = 10000;( r0 o$ H& }5 W2 F2 s4 I1 K+ R4 I$ Y O
- TIM2_CH2Handler.OCPolarity = TIM_OCPOLARITY_HIGH; P( j2 j+ B- l+ g
- TIM2_CH2Handler.OCFastMode = TIM_OCFAST_DISABLE;
" B, ~! w- f! b1 Z3 f! J1 ]5 W+ ] - HAL_TIM_PWM_ConfigChannel(&TIM2_Handler, &TIM2_CH2Handler, TIM_CHANNEL_2) ;
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7 U' Z3 a4 n9 \3 N/ K- __HAL_TIM_ENABLE_IT(&TIM2_Handler, TIM_IT_UPDATE);1 d% f W4 d3 `+ W/ ^+ S
- TIM_CCxChannelCmd(TIM2_Handler.Instance, TIM_CHANNEL_2, TIM_CCx_ENABLE);
# D4 i% g5 X6 ~& n2 |5 O% Z0 h- n7 ] - __HAL_TIM_ENABLE(&TIM2_Handler);# S! r" C* G* W i2 T8 }
- }
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2 z' i4 i# L$ U# E5 d6 T/ w- void TIM2_IRQHandler(void)
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- HAL_TIM_IRQHandler(&TIM2_Handler);
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- void HAL_TIM_PeriodElapsedCallback(TIM_HandleTypeDef *htim)
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) x! z' r% _+ E d/ C - if (htim == (&TIM2_Handler))! ^" [* @# j6 W2 {: E
- {
( p! b9 o3 N+ O - printf("enter irq\r\n");, H9 F* t1 R# p4 ~) h5 S- M
- }
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% }) n1 ~" O' ]. I3 ]- void HAL_TIM_PWM_MspInit(TIM_HandleTypeDef *htim)1 c; J4 E r M8 d. i& m
- {
% o- e1 P. u/ L* A2 ^# `: h - GPIO_InitTypeDef GPIO_InitStruct = {0};
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' `7 z* \$ z8 @; T, F1 D- @- __HAL_RCC_TIM2_CLK_ENABLE();
% x H' G9 p. d - __HAL_RCC_GPIOA_CLK_ENABLE();
- m! v" y/ _" P+ d9 \% }: M - GPIO_InitStruct.Pin = GPIO_PIN_1;
' ^) M) e# {; }) d5 s - GPIO_InitStruct.Mode = GPIO_MODE_AF_PP;
/ L8 R1 o' N+ X: T - GPIO_InitStruct.Pull = GPIO_NOPULL;
' q' k9 Y& d5 E- w+ Q; N9 R7 d } - GPIO_InitStruct.Speed = GPIO_SPEED_FREQ_LOW;
: p. D- f V4 x' k - GPIO_InitStruct.Alternate = GPIO_AF1_TIM2;
+ o) J% W3 b, f - HAL_GPIO_Init(GPIOA, &GPIO_InitStruct);7 |+ Z- m& V1 u5 N
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复制代码
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