基本计时功能0 H% w5 _6 }0 n( K4 Z
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。1 F, M+ Z" E) b$ E& h7 \3 Q' {9 h: n
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) k, [; g8 ]4 s
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。
7 A1 N8 l- C) w9 D, R- TIM_HandleTypeDef TIM2_Handler;
4 U- u& q& g/ Y7 N" L T6 C - static void MX_TIM2_Init(void)
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- TIM2_Handler.Instance = TIM2;
% p. i, a' s4 [! b6 p4 @ - TIM2_Handler.Init.Prescaler = 10800;" h) z5 k5 m$ x# Y# F; E7 J
- TIM2_Handler.Init.CounterMode = TIM_COUNTERMODE_UP;
/ j# x7 C1 D8 X: G9 C' W - TIM2_Handler.Init.Period = 20000;
1 H( R1 b6 a/ m0 _* Z - TIM2_Handler.Init.ClockDivision = TIM_CLOCKDIVISION_DIV1;( l: A& u2 W3 ?/ J0 h( Y9 Q7 l) g7 O
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- HAL_TIM_Base_Init(&TIM2_Handler);
6 o, Z( U; r; ?. w' E$ h3 @ - HAL_TIM_Base_Start(&TIM2_Handler);
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- E8 H% Y4 E. G3 o$ L; d- void HAL_TIM_Base_MspInit(TIM_HandleTypeDef *htim)
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" g$ T ~+ U) M - __HAL_RCC_TIM2_CLK_ENABLE(); //使能TIM3时钟
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' A% W3 i# x: S/ T主函数中每秒打印一次定时器的值:
4 \. C- Q7 }+ [* r. |% k+ M( l5 `$ q- while (1)+ t0 B; C3 v/ d/ V! ]
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- printf("cnt:%d\r\n",TIM2->CNT);
! ]0 i% b B4 u- k( H( w7 N9 {; c - delay_ms(1000);
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复制代码 显示效果如下:! Y/ r6 J8 J R. F4 j
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定时器中断
, W4 {* |) O5 s( J. X" g7 ~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;
+ }( ^2 R6 n6 J) E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;$ k1 z) s5 Y/ s/ l* V; Q
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;
- J7 h( W; e8 P$ I9 m, S5 G, q- TIM_HandleTypeDef TIM2_Handler;
, F. G" x# j1 S7 M2 n, \0 b' i0 a - static void MX_TIM2_Init(void)1 G0 k0 u1 ` O' n3 y; R
- {
* ]# | Z& p Z0 a. n - TIM2_Handler.Instance = TIM2;- M( r8 E% D4 @. O$ `) {
- TIM2_Handler.Init.Prescaler = 10800;
* q9 g2 i! n2 \) N- Z7 P" E - TIM2_Handler.Init.CounterMode = TIM_COUNTERMODE_UP;3 h0 l3 K. F1 P7 `7 Z$ o/ R
- TIM2_Handler.Init.Period = 20000;' |" [2 @2 }) f& e5 ^
- TIM2_Handler.Init.ClockDivision = TIM_CLOCKDIVISION_DIV1;
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1 q1 Q+ E- P9 T; L0 e w- HAL_TIM_Base_Init(&TIM2_Handler);0 B/ t \4 g+ |0 Y' S
- //HAL_TIM_Base_Start(&TIM2_Handler);
) q3 ]4 p; y* z3 T" K$ \6 V& F - HAL_TIM_Base_Start_IT(&TIM2_Handler);( @( ]6 D, S% j1 k O* `" |" z* a
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* K, r; @7 `) D* W9 q6 V/ u7 M- void HAL_TIM_Base_MspInit(TIM_HandleTypeDef *htim)
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- __HAL_RCC_TIM2_CLK_ENABLE(); //使能TIM2时钟* P4 O! ~6 Z! b- w7 d
- HAL_NVIC_SetPriority(TIM2_IRQn, 1, 3); //设置中断优先级,抢占优先级1,子优先级32 M, g' I, E6 v" T- q
- HAL_NVIC_EnableIRQ(TIM2_IRQn); //开启ITM2中断
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- void TIM2_IRQHandler(void)6 V! y9 _& i _& S: q
- {
* E/ e; T/ n) {2 `. a - HAL_TIM_IRQHandler(&TIM2_Handler);/ m- W) E; V* X1 _
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- void HAL_TIM_PeriodElapsedCallback(TIM_HandleTypeDef *htim): E5 l$ S$ i. }
- {
1 `# w" W0 \& w& j# t) P - if (htim == (&TIM2_Handler))
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- printf("enter irq\r\n");) |( j. U, X k4 H- w
- }
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0 }, p: I2 T1 r; _' v* H显示效果如下:
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; {; V/ \" ?: O! l$ d' JPWM输出( _. { u# q: b* n, C( Q
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; P" N6 V5 G, V" a1 v
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;
. f5 D# R) O# k( C4 ]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;
/ o9 _0 P& w" g6 a2 }/ ]- TIM_HandleTypeDef TIM2_Handler;4 ^1 h4 v- o; ~( t
- TIM_OC_InitTypeDef TIM2_CH2Handler;
4 Z$ T( ^$ d6 B% y1 N5 A' Z - static void MX_TIM2_Init(void)/ `' y5 s# O9 M" t
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- TIM2_Handler.Instance = TIM2;3 }1 A) |9 S/ \) n# y% g9 u
- TIM2_Handler.Init.Prescaler = 10800;' z# L6 r0 T7 w* h& M
- TIM2_Handler.Init.CounterMode = TIM_COUNTERMODE_UP;9 z% ?# x% T! k5 S
- TIM2_Handler.Init.Period = 20000;) }& Z5 o6 K% g9 [% S4 c4 u/ M5 K; { A
- TIM2_Handler.Init.ClockDivision = TIM_CLOCKDIVISION_DIV1;
z( B% O3 y2 [6 n - HAL_TIM_PWM_Init(&TIM2_Handler);
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- TIM2_CH2Handler.OCMode = TIM_OCMODE_PWM1;/ h$ E6 Z) e2 d5 l$ n3 X) k
- TIM2_CH2Handler.Pulse = 10000;4 Z8 ^3 }* a6 |8 ~3 m) U7 u0 E. C9 j
- TIM2_CH2Handler.OCPolarity = TIM_OCPOLARITY_HIGH;" D& K8 T$ q; i" q& k
- TIM2_CH2Handler.OCFastMode = TIM_OCFAST_DISABLE;
% a1 p. z4 S& K. t0 y4 |) z - 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2
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- void HAL_TIM_PWM_MspInit(TIM_HandleTypeDef *htim)* K# w1 d0 U+ T* L
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- GPIO_InitTypeDef GPIO_InitStruct = {0};. Y( Z/ g" ]* I8 L
-
7 M4 l& U& [4 ?" I$ i$ b1 o4 Y - __HAL_RCC_TIM2_CLK_ENABLE(); 3 g' e4 B& \" c9 x, v' h1 X
- __HAL_RCC_GPIOA_CLK_ENABLE();* p2 l9 r/ ]# r$ z4 w! k
- GPIO_InitStruct.Pin = GPIO_PIN_1;, Y$ T" w% y$ J0 w: n0 x8 c/ j
- GPIO_InitStruct.Mode = GPIO_MODE_AF_PP;
8 E) }8 T6 B& s+ D' Q& }" o! z - GPIO_InitStruct.Pull = GPIO_NOPULL;" M$ r, J6 z! F( N+ N# W1 B
- GPIO_InitStruct.Speed = GPIO_SPEED_FREQ_LOW;
Q( |4 Z3 t, o0 c q - GPIO_InitStruct.Alternate = GPIO_AF1_TIM2;
$ [" [; Z. C% b; ~; ]3 k6 _8 n& n - HAL_GPIO_Init(GPIOA, &GPIO_InitStruct);
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$ t5 p0 u8 Z; j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:6 Y+ G9 c) Z' g) \
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PWM + 定时器溢出中断7 Z3 o7 U- \1 R8 F; w% Y* W
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 i0 O. x+ A# |3 t2 ~' q0 a
这里我们观察一下两种初始化函数:
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- * @brief Initializes the TIM Time base Unit according to the specified, |4 X& c8 d1 K) x+ U6 T, C# b3 A
- * parameters in the TIM_HandleTypeDef and create the associated handle.1 H# n3 w$ d. U
- * @param htim: pointer to a TIM_HandleTypeDef structure that contains/ j' v% v7 o! M/ ^. R! |
- * the configuration information for TIM module.
5 u+ V/ J- R" _# v - * @retval HAL status
! E! ]1 k( c! d* {7 u# _ - */
8 Y6 f/ D9 l3 j I* }( m - HAL_StatusTypeDef HAL_TIM_Base_Init(TIM_HandleTypeDef *htim) F( D$ j! u5 r$ L. Y* K( \ R6 A- n
- {
. d0 R3 ]1 l5 A9 t - /* Check the TIM handle allocation */, f) F" `, F. |4 Q( f" n% n
- if(htim == NULL)
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- return HAL_ERROR;- [. ^* O" E6 x8 S$ u2 f
- }
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$ C+ A( w5 g! N! P - /* Check the parameters */) g( B# k9 U% C* V- w
- assert_param(IS_TIM_INSTANCE(htim->Instance)); 8 O7 ^' W9 k, {
- assert_param(IS_TIM_COUNTER_MODE(htim->Init.CounterMode));
7 W- X- b1 @* N6 b0 ~( c - assert_param(IS_TIM_CLOCKDIVISION_DIV(htim->Init.ClockDivision));1 \' s- m7 b: S* h
-
, ~) s! n7 r0 q" K7 D- u" h - if(htim->State == HAL_TIM_STATE_RESET)
2 q; F& l- H! g2 _ - {
) O b! w: m$ y" t; P, } - /* Init the low level hardware : GPIO, CLOCK, NVIC */& @0 D) D5 o# v! P
- HAL_TIM_Base_MspInit(htim);
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p; D$ @, m; y4 A+ K' e - /* Set the TIM state */6 N, j5 q$ m( h! \
- htim->State= HAL_TIM_STATE_BUSY;1 W8 T1 s% L3 S. j: s
-
4 H$ f. v9 {# h - /* Set the Time Base configuration */
6 L' ?# u/ J& j+ x2 Q: f. j - TIM_Base_SetConfig(htim->Instance, &htim->Init);
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* v( y: i" @7 H; M% M7 S5 y - /* Initialize the TIM state*/& g9 R2 p5 n I! {
- htim->State= HAL_TIM_STATE_READY;
, {& p: r% K& N" R0 t -
& H6 R& I* x& n& o) V5 w# o - return HAL_OK;7 x9 n5 y& z$ d- D7 M' G
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- HAL_StatusTypeDef HAL_TIM_PWM_Init(TIM_HandleTypeDef *htim)6 t7 _. ~& s" C& |9 o, r# w' S
- {
* Q/ y6 _8 K! L/ l* i2 b) g9 m9 I4 e - /* Check the TIM handle allocation */5 e' N# U1 F d1 X- ~, [
- if(htim == NULL)
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* }" N( p) g" B* X- n: D0 d0 q - return HAL_ERROR;" b' u$ Z/ b' G1 x# }8 u
- }
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- /* Check the parameters */
, f* B# Q' h8 @9 ` - assert_param(IS_TIM_INSTANCE(htim->Instance));
9 U) O" i5 l5 m: j- X. h - assert_param(IS_TIM_COUNTER_MODE(htim->Init.CounterMode));4 S* u# {# S5 G2 x0 Y# h: l& Y
- assert_param(IS_TIM_CLOCKDIVISION_DIV(htim->Init.ClockDivision));# v* K. e& W+ w% N7 j2 u5 l2 ^
% ~1 P9 u8 F0 v) {7 V- if(htim->State == HAL_TIM_STATE_RESET)
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- /* Allocate lock resource and initialize it */
' [' v% U; v: G - htim->Lock = HAL_UNLOCKED; 7 G3 @/ c) H5 i& Z9 j
- /* Init the low level hardware : GPIO, CLOCK, NVIC and DMA */
# e) L$ k9 r7 k% S% w - HAL_TIM_PWM_MspInit(htim);
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. f7 Q) J3 m2 d- /* Set the TIM state */
, q! D& P# x! @ - htim->State= HAL_TIM_STATE_BUSY;
: U* K/ P) Q, L" z. E( \ -
$ O8 g: ~. Z$ e! [1 k4 V) c' C$ b: Z3 E - /* Init the base time for the PWM */
% I: g( R/ U3 P - TIM_Base_SetConfig(htim->Instance, &htim->Init);
8 P5 Q. K8 m& J2 b/ ]% E -
; m! ^/ y6 b+ w. v" D" J - /* Initialize the TIM state*/
) P$ D/ J! _: e6 Y - htim->State= HAL_TIM_STATE_READY;
: c) K, H# v1 v* w -
+ b g/ x% h5 y- H( U% L# V - return HAL_OK;, {; G# l e# z/ b
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/ N r- @) \4 Y8 g( L( l& [. v. Q2 y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。
1 y% R T, P3 t# A) ~再来看启动代码:
9 g8 S( q4 ~& i1 R }- /**
' k' S" @' T% N9 N5 L( w - * @brief Starts the TIM Base generation.! e# y' u$ e( U
- * @param htim: pointer to a TIM_HandleTypeDef structure that contains+ x2 w5 Q4 |2 j! h; G! |
- * the configuration information for TIM module.
; d9 d8 e4 S9 d1 F - * @retval HAL status
* H9 I7 d+ K9 b* T& N. p% L' z - */
+ k' U( p$ \# ]' e7 b" J, p8 c - HAL_StatusTypeDef HAL_TIM_Base_Start(TIM_HandleTypeDef *htim)
. q, \$ ?/ [+ u3 J; O - {
' _( B* z) \" ? - /* Check the parameters */6 I* {6 c+ I- y; q" W
- assert_param(IS_TIM_INSTANCE(htim->Instance));
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- /* Set the TIM state */
7 y2 O$ N. t* Z5 C4 j( B - htim->State= HAL_TIM_STATE_BUSY;
2 g! Z: w! I& A, W4 G6 j -
7 o$ _ f5 C8 O( Q/ @8 G" }, N# b - /* Enable the Peripheral */, s; O4 b5 { w" ^* v% s
- __HAL_TIM_ENABLE(htim);
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- /* Change the TIM state*/% J' s& m/ a% @+ R4 V8 w
- htim->State= HAL_TIM_STATE_READY;: Q8 c E2 B% L9 `
-
/ j2 {& g% y( B1 c; ` - /* Return function status */& `" g5 d, R) X% h
- return HAL_OK;
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- 9 r' J( l: F8 D6 O: U# k& v$ _
+ x L7 I$ r4 ^) W$ n- /**: e0 b; q( `% S% ?5 o8 H6 `& `
- * @brief Starts the TIM Base generation in interrupt mode.
5 Y7 M* h: t9 @' W# y+ w l6 G+ D F - * @param htim: pointer to a TIM_HandleTypeDef structure that contains- l. J7 a( n: Q
- * the configuration information for TIM module.
7 }$ q* f8 | Q F; c$ R - * @retval HAL status
2 [; y8 @( F' i% q- @2 {' Z) P - */
4 x4 a" J/ J, F( z! }2 \" z2 U - HAL_StatusTypeDef HAL_TIM_Base_Start_IT(TIM_HandleTypeDef *htim)
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- /* Check the parameters */0 V$ N* r) X( q& K& H
- assert_param(IS_TIM_INSTANCE(htim->Instance));+ w- u" i4 d" f8 f9 }7 O' g# A& y
-
8 E- w/ {, p. q* z3 d - /* Enable the TIM Update interrupt */3 x' n: `- C5 ^$ M
- __HAL_TIM_ENABLE_IT(htim, TIM_IT_UPDATE);, q$ ]8 D6 W( |4 _6 l) e7 P/ F
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- /* Enable the Peripheral */# S( t# p+ G! s
- __HAL_TIM_ENABLE(htim);
. @7 I F( m9 `( }1 y3 x -
- Y ^# A5 d. `+ F5 Q% |7 A: ~ - /* Return function status */
5 j# X! s# O y9 S- S6 p% v - return HAL_OK;
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4 I7 H Q- ^' ^5 u! l3 @- /**! y) h3 A; }6 S
- * @brief Starts the PWM signal generation.$ _$ l7 |( `2 {3 K. L: D
- * @param htim: pointer to a TIM_HandleTypeDef structure that contains
- y. b% m+ f. N+ } - * the configuration information for TIM module.
" ]8 t$ n, B* M" a) M2 I - * @param Channel: TIM Channels to be enabled.) s) M X, ~' n. f0 J ?
- * This parameter can be one of the following values:4 Q; d; Q8 d; S
- * @arg TIM_CHANNEL_1: TIM Channel 1 selected
+ V% h, n3 b& L9 h7 L0 I L6 E) F7 { - * @arg TIM_CHANNEL_2: TIM Channel 2 selected
8 ^1 g8 K0 f0 W$ W - * @arg TIM_CHANNEL_3: TIM Channel 3 selected
4 j: u' f4 I! k - * @arg TIM_CHANNEL_4: TIM Channel 4 selected R$ _; t6 b0 z4 J) y
- * @retval HAL status# g% t" I2 S2 t$ z! L9 w$ z) g
- */, \0 H% E* _6 g- {
- HAL_StatusTypeDef HAL_TIM_PWM_Start(TIM_HandleTypeDef *htim, uint32_t Channel)
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- /* Check the parameters */0 G5 w: E$ O+ K5 i: P
- assert_param(IS_TIM_CCX_INSTANCE(htim->Instance, Channel));, N$ w2 \9 A- ]* L8 [9 `
0 k# H" A$ _, A+ T- /* Enable the Capture compare channel */. g/ F1 j" ^) Q2 `$ ]; I( G$ W
- TIM_CCxChannelCmd(htim->Instance, Channel, TIM_CCx_ENABLE);' P( m/ x" w6 H2 _4 @5 T; I
-
4 b1 i+ w; e8 g2 Z - if(IS_TIM_ADVANCED_INSTANCE(htim->Instance) != RESET) 6 `( M% V* J$ B$ n9 W0 z
- {
( w+ _% \! z; a; S( x8 l1 D - /* Enable the main output */4 T% R* u9 J# A% p, y
- __HAL_TIM_MOE_ENABLE(htim);( a; ^* B5 H: b
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- /* Enable the Peripheral */7 i! U3 b, P4 q0 R( ~
- __HAL_TIM_ENABLE(htim);
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- /* Return function status */
5 o6 w. j; u: m - return HAL_OK;1 `# ` Q6 ?; k7 j% e( ^$ @; |
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' y S4 Q! k6 t: s- Y其中的核心代码分别是:
6 j. M& t5 y( }- c! m6 _- __HAL_TIM_ENABLE(htim);9 Y( b1 b6 Z5 [0 ?- p ~0 [
复制代码- __HAL_TIM_ENABLE_IT(htim, TIM_IT_UPDATE);
' X6 Z0 U. M7 u; n& \5 q - __HAL_TIM_ENABLE(htim);) L7 u3 H3 ?) q7 [, c; o; H
复制代码- TIM_CCxChannelCmd(htim->Instance, Channel, TIM_CCx_ENABLE);
+ D9 J" j, B4 J& }: U, V - __HAL_TIM_ENABLE(htim);
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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。6 v8 O# i. H0 B6 g' d8 O! A/ t
- __HAL_TIM_ENABLE_IT(htim, TIM_IT_UPDATE);, M# X( H0 I. c' b/ o- d
- TIM_CCxChannelCmd(htim->Instance, Channel, TIM_CCx_ENABLE);+ ~" e, X3 j$ ~2 i9 A
- __HAL_TIM_ENABLE(htim);
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, h: O& t7 K6 o完整代码如下:4 B- T9 v, b$ }: u5 g
- TIM_HandleTypeDef TIM2_Handler;' S8 k6 {# o8 c0 Y$ x) T
- TIM_OC_InitTypeDef TIM2_CH2Handler;
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* ^- s# [, D+ r- static void MX_TIM2_Init(void), `% o1 w6 i a* o) }( o, z/ u
- {
9 N5 q) U" _1 z: a; z X- {* h* H - __HAL_RCC_TIM2_CLK_ENABLE();
5 r+ t+ I& u d' \# ]5 S - HAL_NVIC_SetPriority(TIM2_IRQn, 1, 3);, E/ d) w0 g1 a+ c) d
- HAL_NVIC_EnableIRQ(TIM2_IRQn);7 G; e: h* ?2 e% X S m; C S
1 p) z" ]" W. X8 }4 C9 `- TIM2_Handler.Instance = TIM2;% U5 c9 ^! s9 w4 Z) S+ R, Q
- TIM2_Handler.Init.Prescaler = 10800;
, ~0 H e, e' l2 q - TIM2_Handler.Init.CounterMode = TIM_COUNTERMODE_UP;
9 X" \( p( }0 c9 L - TIM2_Handler.Init.Period = 20000;# B! _! M8 R" Z: H" c
- TIM2_Handler.Init.ClockDivision = TIM_CLOCKDIVISION_DIV1;
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- HAL_TIM_PWM_Init(&TIM2_Handler);
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- TIM2_CH2Handler.OCMode = TIM_OCMODE_PWM1;1 n) l3 w6 S! V2 I: w
- TIM2_CH2Handler.Pulse = 10000;
/ \/ U3 R& |* T8 Y - TIM2_CH2Handler.OCPolarity = TIM_OCPOLARITY_HIGH;) V; _- A d' f' p' B6 \
- TIM2_CH2Handler.OCFastMode = TIM_OCFAST_DISABLE;) U- ?; W8 i! U2 O4 e
- HAL_TIM_PWM_ConfigChannel(&TIM2_Handler, &TIM2_CH2Handler, TIM_CHANNEL_2) ;
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) I$ w7 l; c" W' y- __HAL_TIM_ENABLE_IT(&TIM2_Handler, TIM_IT_UPDATE);
. Y' [. y' J% C9 o, @ - TIM_CCxChannelCmd(TIM2_Handler.Instance, TIM_CHANNEL_2, TIM_CCx_ENABLE);
8 H; S- S$ g1 H* `6 _% t* y9 [3 g - __HAL_TIM_ENABLE(&TIM2_Handler);% d' {$ f6 g* q0 p2 O- e+ g
- }
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7 F7 Q* P! A( Z/ Q4 x' B- void TIM2_IRQHandler(void)
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8 B: S+ b, b& t7 M. x0 U6 u- t z4 D - HAL_TIM_IRQHandler(&TIM2_Handler);
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F, x2 I: \& j. w" ~- void HAL_TIM_PeriodElapsedCallback(TIM_HandleTypeDef *htim)
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5 Y, T1 M8 @1 F/ c; } - if (htim == (&TIM2_Handler))
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9 q; d7 K3 J# F2 e7 w1 b3 @) k - printf("enter irq\r\n");# J* [7 q4 O$ F% E
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' G9 V$ G6 B2 c8 H0 E# J- void HAL_TIM_PWM_MspInit(TIM_HandleTypeDef *htim)
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- GPIO_InitTypeDef GPIO_InitStruct = {0};
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0 ] v3 H6 I- ]# U- __HAL_RCC_TIM2_CLK_ENABLE();7 D: i: Y6 K8 z l8 A9 S
- __HAL_RCC_GPIOA_CLK_ENABLE();$ b! V( t. y- U" }7 n" ~6 ~
- GPIO_InitStruct.Pin = GPIO_PIN_1;
9 Z1 z: }6 [# a' v - GPIO_InitStruct.Mode = GPIO_MODE_AF_PP;( y" U4 K; E; j4 l6 e* p! T
- GPIO_InitStruct.Pull = GPIO_NOPULL;9 @/ U4 z, W7 {3 E7 D6 w* X
- GPIO_InitStruct.Speed = GPIO_SPEED_FREQ_LOW;5 [! T! T z3 V x- S" o" i, m
- GPIO_InitStruct.Alternate = GPIO_AF1_TIM2;
" J/ [/ \" q$ O - HAL_GPIO_Init(GPIOA, &GPIO_InitStruct);
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