1. 配置STM32CubeMX
* O5 k; K" Z" ]+ \

前面的一些基础步骤可参见：【STM32】CubeMX+HAL 点亮LED 的【1.1】~【1.6】步骤。

% N( T! p1 T: L' q. ^

核心配置：

这里我使用的是 TIM2 定时器，当然使用其他的也可以，但要注意相关配置。

& P9 N6 Z% j) @  @% P+ ?9 U

1.1 TIM2 的 Mode 配置

3 @/ Q+ n- T% ^' B

1.2 TIM2 的 Configuration 配置


2 O2 L. y5 p% j+ e9 r

1 _0 x3 m6 P; H2 O
9 T& ?( J5 L5 X1.3 其余 GPIO 配置

PA2 的 PWM 输出作为 PA6 的输入，PA6 连接的是一个 LED ，观察是否出现呼吸灯现象。

% k! |& K8 I6 d& Q6 x' K& j, ?) E4 d

; {1 x3 G- ~$ m3 _4 v$ u9 |

余下步骤可参见：【STM32】CubeMX+HAL 点亮LED 的【1.10】~【1.13】步骤。

2. 添加代码

下面贴出主要代码：

) _7 W3 g8 T' R& f; `* l
, @4 j% f! X2 z+ z( r+ c; z2.1 gpio.c

1. /**
   
2.   ******************************************************************************
   7 `) h, |, `) _: H9 G
3.   * File Name          : gpio.c
   
4.   * Description        : This file provides code for the configuration
   0 o/ p/ R0 @7 o( [3 y6 S
5.   *                      of all used GPIO pins.
   
6.   ******************************************************************************
   
7.   * @attention
   
8.   *
   ! G: P% f' u0 q/ [
9.   * <h2><center>© Copyright (c) 2020 STMicroelectronics.
   
10.   * All rights reserved.</center></h2>
    4 R* w/ ]; f' d8 o& W, O
11.   *
    
12.   * This software component is licensed by ST under BSD 3-Clause license,
    5 P4 \3 ~  u3 O9 Y2 O) A
13.   * the "License"; You may not use this file except in compliance with the
    . m! J2 b9 O- _9 a
14.   * License. You may obtain a copy of the License at:
    
15.   *                        opensource.org/licenses/BSD-3-Clause
    
16.   *
    
17.   ******************************************************************************
    
18.   */
    
19. 
    
20. /* Includes ------------------------------------------------------------------*/
    ) y2 e6 O) t1 a' Y- }/ d$ F
21. #include "gpio.h"
    + l- `# z5 j$ ~) `
22. /* USER CODE BEGIN 0 */
    
23. 
    
24. /* USER CODE END 0 */
    4 M( _& c  ?2 ^" ^0 F+ ~
25. 
    . v' v  G& W- Q5 v
26. /*----------------------------------------------------------------------------*/
    
27. /* Configure GPIO                                                             */
    
28. /*----------------------------------------------------------------------------*/
    
29. /* USER CODE BEGIN 1 */
    6 t0 A+ d" a, j6 z3 x
30. 
    $ w! `. v0 P3 g
31. /* USER CODE END 1 */
    0 ?: Y+ _7 h8 e% k( Q# I
32. 
    ) `" V  f9 H$ g9 _8 o7 R" d& i
33. /** Configure pins as
    / l" C8 N. M' b" y
34.         * Analog
    : _, ]  t: p" C! ?4 L! _: C
35.         * Input
    * h9 V/ ~) E( P6 _% D# H4 f
36.         * Output
    
37.         * EVENT_OUT
    
38.         * EXTI
    
39. */
    3 ^! l3 f: K: A# s8 [
40. void MX_GPIO_Init(void)
    4 Y' o% i5 t3 g
41. {
    
42. 
    ! ~0 O0 r) N4 a$ s$ i
43.   GPIO_InitTypeDef GPIO_InitStruct = {0};
    
44. 
    ! m( T4 `, l0 _7 _$ p: k! t: o
45.   /* GPIO Ports Clock Enable */
      q3 f& W& b. `. ?' k. b7 a* I
46.   __HAL_RCC_GPIOC_CLK_ENABLE();
    ' T4 ]9 b% T$ b/ I& x# \9 W
47.   __HAL_RCC_GPIOH_CLK_ENABLE();
    
48.   __HAL_RCC_GPIOA_CLK_ENABLE();
    * T$ n( _; t$ Q8 b
49. 
    ; K6 Z0 G' I1 L. P- x
50.   /*Configure GPIO pin : PA6 */
    2 D7 i; ~$ H( |  ?9 [8 u9 ]
51.   GPIO_InitStruct.Pin = GPIO_PIN_6;
    2 o/ j- a; b0 z4 a  O
52.   GPIO_InitStruct.Mode = GPIO_MODE_INPUT;
    
53.   GPIO_InitStruct.Pull = GPIO_NOPULL;
    
54.   HAL_GPIO_Init(GPIOA, &GPIO_InitStruct);
    6 E3 ?) o! w, Y( U
55. 
    
56. }
    / l( ~2 d* d; J4 a
57. 
    
58. /* USER CODE BEGIN 2 */
    
59. 
    7 {: M- H. P5 w$ ?2 @
60. /* USER CODE END 2 */
    . ^& M# C& [2 f" _# s* V
61. 
    5 u+ K8 @3 ?+ {6 U/ k3 h; W" u- j
62. /************************ (C) COPYRIGHT STMicroelectronics *****END OF FILE****/
    

复制代码

& j6 B5 ?( q) e5 X; n: o8 D
2.2 time.c

1. /**
   
2.   ******************************************************************************
   7 `' n8 ~, `" q) F1 Z
3.   * File Name          : TIM.c
   4 R; @& s. \0 _
4.   * Description        : This file provides code for the configuration
   * V1 F6 v! ?" B& Y4 S& E$ j9 D$ W
5.   *                      of the TIM instances.
   % E+ }( k" U) H$ v
6.   ******************************************************************************
   . ]" N; _, V* C3 y
7.   * @attention
   
8.   *
   . Z" d6 j7 N$ g
9.   * <h2><center>© Copyright (c) 2020 STMicroelectronics.
   
10.   * All rights reserved.</center></h2>
    
11.   *
    ; J) }, ?' t! P0 t, i
12.   * This software component is licensed by ST under BSD 3-Clause license,
    
13.   * the "License"; You may not use this file except in compliance with the
    4 @# K6 O; X3 [) i# l% ^: \
14.   * License. You may obtain a copy of the License at:
    
15.   *                        opensource.org/licenses/BSD-3-Clause
    / O% W2 f& D% B0 m' _1 a/ |
16.   *
    3 D. W: D; W! N/ m* ]
17.   ******************************************************************************
    5 v# L& |7 K- f+ w" j
18.   */
    + L6 L; W8 f, M- m0 H
19. 
    
20. /* Includes ------------------------------------------------------------------*/
    
21. #include "tim.h"
    
22. 
    : D$ r% P1 g' k+ \  }$ d
23. /* USER CODE BEGIN 0 */
    
24. 
    . q) R0 e: W- ^5 z: \1 @, m* d" C
25. /* USER CODE END 0 */
    
26. 
    
27. TIM_HandleTypeDef htim2;
    4 m4 t% h' p) I+ a: C; ^7 F* I9 T
28. 
    - n3 w6 L# G! j+ V
29. /* TIM2 init function */
    9 Z+ G% u; S% _( r$ Y; J* _: P
30. void MX_TIM2_Init(void)
    
31. {
    
32.   TIM_ClockConfigTypeDef sClockSourceConfig = {0};
    9 l2 F7 h' n$ O0 s% X
33.   TIM_MasterConfigTypeDef sMasterConfig = {0};
    
34.   TIM_OC_InitTypeDef sConfigOC = {0};
    
35. 
    # b: v# P' d0 B& \" K
36.   htim2.Instance = TIM2;
    ' Q: n- q5 y0 f6 h+ p
37.   htim2.Init.Prescaler = 80-1;
    ( u& I& `6 I) L0 I5 C2 M
38.   htim2.Init.CounterMode = TIM_COUNTERMODE_UP;
    , }6 I- z2 Q( n9 p
39.   htim2.Init.Period = 100;
    2 j6 i1 L5 G+ p- ^* I$ M
40.   htim2.Init.ClockDivision = TIM_CLOCKDIVISION_DIV1;
    
41.   htim2.Init.AutoReloadPreload = TIM_AUTORELOAD_PRELOAD_DISABLE;
    " E; M( D3 j9 B# W3 M8 Y
42.   if (HAL_TIM_Base_Init(&htim2) != HAL_OK)
    - }7 [* S) `( T
43.   {
    * g- s. D, U) w
44.     Error_Handler();
    
45.   }
    
46.   sClockSourceConfig.ClockSource = TIM_CLOCKSOURCE_INTERNAL;
    
47.   if (HAL_TIM_ConfigClockSource(&htim2, &sClockSourceConfig) != HAL_OK)
    2 n8 c4 `8 i0 t9 _1 _3 m3 g* d/ |# L
48.   {
    $ ^# |* L' L& H, S$ k! T2 g0 N
49.     Error_Handler();
    
50.   }
    
51.   if (HAL_TIM_PWM_Init(&htim2) != HAL_OK)
    
52.   {
    , I( d% l  M7 ?& ~( Q1 {; T
53.     Error_Handler();
    
54.   }
    $ P! Z! E* o; T
55.   sMasterConfig.MasterOutputTrigger = TIM_TRGO_RESET;
    
56.   sMasterConfig.MasterSlaveMode = TIM_MASTERSLAVEMODE_DISABLE;
    ! x5 x& t" e* a+ H4 @( X3 s
57.   if (HAL_TIMEx_MasterConfigSynchronization(&htim2, &sMasterConfig) != HAL_OK)
    
58.   {
    3 E; D# J! z) H" v
59.     Error_Handler();
    3 `  f6 U2 O& B4 Y" G
60.   }
    
61.   sConfigOC.OCMode = TIM_OCMODE_PWM1;
    2 E$ e( T% V7 q1 _+ C7 O( E* h
62.   sConfigOC.Pulse = 0;
    , w: @, p1 w9 j$ @- Z9 `1 B
63.   sConfigOC.OCPolarity = TIM_OCPOLARITY_HIGH;
    # ~4 g- [4 k9 G. c. S4 i+ {) _
64.   sConfigOC.OCFastMode = TIM_OCFAST_DISABLE;
    " @; |; h6 O! T8 e. |/ B, B
65.   if (HAL_TIM_PWM_ConfigChannel(&htim2, &sConfigOC, TIM_CHANNEL_3) != HAL_OK)
    
66.   {
    + T0 x5 z& j! x- i
67.     Error_Handler();
    
68.   }
    - x2 q, p8 y- t! N0 u
69.   HAL_TIM_MspPostInit(&htim2);
    
70. 
    
71. }
    : `' A' P, E2 w; o! y& v, i
72. 
    , [& M: l$ D' Q& c
73. void HAL_TIM_Base_MspInit(TIM_HandleTypeDef* tim_baseHandle)
    
74. {
    
75. 
    - L2 V/ t; H9 O5 E8 {: m3 b
76.   if(tim_baseHandle->Instance==TIM2)
    
77.   {
    
78.   /* USER CODE BEGIN TIM2_MspInit 0 */
    
79. 
    - ?9 t" @6 z4 _$ v/ m! W
80.   /* USER CODE END TIM2_MspInit 0 */
    
81.     /* TIM2 clock enable */
    ) q! g* f6 M* l
82.     __HAL_RCC_TIM2_CLK_ENABLE();
    
83.   /* USER CODE BEGIN TIM2_MspInit 1 */
    ; Z# K7 b, V5 `: c" }: P5 U$ d
84. 
    
85.   /* USER CODE END TIM2_MspInit 1 */
    
86.   }
    
87. }
    2 Y) _# p8 [! f+ H  ^8 F
88. void HAL_TIM_MspPostInit(TIM_HandleTypeDef* timHandle)
    
89. {
    ) s1 X! p) j( E1 w1 r3 M
90. 
    
91.   GPIO_InitTypeDef GPIO_InitStruct = {0};
    ! `6 L$ ?5 v8 n4 s8 [/ w
92.   if(timHandle->Instance==TIM2)
    9 ^8 Q9 i9 ?* R' o' k  i' s
93.   {
    : t7 |$ n. z0 X, }/ T% r% n
94.   /* USER CODE BEGIN TIM2_MspPostInit 0 */
    9 `; i  |" o" Z4 w/ C0 ]( ~% o. u
95. 
    % N( Y/ n8 e7 s- h
96.   /* USER CODE END TIM2_MspPostInit 0 */
    ( ?6 Q; @2 S. T$ X2 [' e
97.   
    ' x# M3 Q0 e) p  F- Y8 a8 U
98.     __HAL_RCC_GPIOA_CLK_ENABLE();
    ! i. b: _" b  d
99.     /**TIM2 GPIO Configuration   
    
100.     PA2     ------> TIM2_CH3
     ; n& q5 Y7 @9 M5 g  J, ~3 w. i3 x
101.     */
     
102.     GPIO_InitStruct.Pin = GPIO_PIN_2;
     
103.     GPIO_InitStruct.Mode = GPIO_MODE_AF_PP;
     : [# }7 e" c! ?8 Q& K
104.     GPIO_InitStruct.Pull = GPIO_NOPULL;
     0 i6 Q0 h; L& S/ O3 X6 [
105.     GPIO_InitStruct.Speed = GPIO_SPEED_FREQ_LOW;
     
106.     GPIO_InitStruct.Alternate = GPIO_AF1_TIM2;
     1 w4 y5 T% h) W: T1 |% |
107.     HAL_GPIO_Init(GPIOA, &GPIO_InitStruct);
     
108. 
     0 b& f& C$ E4 o) F0 j
109.   /* USER CODE BEGIN TIM2_MspPostInit 1 */
     
110. 
     ! h2 S3 Q' J; \- Z" u
111.   /* USER CODE END TIM2_MspPostInit 1 */
     
112.   }
     
113. 
     
114. }
     
115. 
     
116. void HAL_TIM_Base_MspDeInit(TIM_HandleTypeDef* tim_baseHandle)
     
117. {
     9 R9 W& u  l2 z
118. 
     
119.   if(tim_baseHandle->Instance==TIM2)
     
120.   {
     7 ]) i6 C8 f' h5 X3 {
121.   /* USER CODE BEGIN TIM2_MspDeInit 0 */
     
122. 
     1 Q) t6 X6 k7 r. d2 Z4 ^
123.   /* USER CODE END TIM2_MspDeInit 0 */
     
124.     /* Peripheral clock disable */
     * u! P" Y, c. e0 k
125.     __HAL_RCC_TIM2_CLK_DISABLE();
     3 a5 I2 p& `! q
126.   /* USER CODE BEGIN TIM2_MspDeInit 1 */
     ! u: C) P4 F3 k4 ^# r7 z9 D
127. 
     * P& F: l( R9 b- m
128.   /* USER CODE END TIM2_MspDeInit 1 */
     
129.   }
     " M7 s' i# t4 @( ]$ H3 `" @
130. }
       F3 i; P: Y9 G
131. 
     
132. /* USER CODE BEGIN 1 */
     # q* z5 ?0 S3 [, b3 e/ l* S# w
133. 
     ( z8 @7 J  V( W5 {- M
134. /* USER CODE END 1 */
     
135. 
     
136. /************************ (C) COPYRIGHT STMicroelectronics *****END OF FILE****/
     

复制代码

, u( Y: ]4 p8 S) S2 X; O8 s. ]6 Q" `2.3 main.c
5 t& i- j# |* M5 ~

1. /* USER CODE BEGIN Header */
   2 m  a! a' F5 p$ f0 `0 r
2. /**
   
3.   ******************************************************************************
   
4.   * @file           : main.c
   
5.   * @brief          : Main program body
   $ Q( i$ z! q; n& D+ f  r# K2 o1 {1 M
6.   ******************************************************************************
   
7.   * @attention
   
8.   *
   : p/ F4 h% W9 K0 D* z5 s
9.   * <h2><center>© Copyright (c) 2020 STMicroelectronics.
   9 ]! ^; i5 t$ B# m  B% X
10.   * All rights reserved.</center></h2>
    
11.   *
    8 ^8 }2 a9 P" v2 ?, V# x9 ?6 l
12.   * This software component is licensed by ST under BSD 3-Clause license,
    
13.   * the "License"; You may not use this file except in compliance with the
    
14.   * License. You may obtain a copy of the License at:
    
15.   *                        opensource.org/licenses/BSD-3-Clause
    % Q3 S5 U! G4 i  N
16.   *
    $ z! K! G: f7 @& `0 E) g
17.   ******************************************************************************
    
18.   */
    
19. /* USER CODE END Header */
    
20. 
    
21. /* Includes ------------------------------------------------------------------*/
    
22. #include "main.h"
    
23. #include "tim.h"
    
24. #include "gpio.h"
    
25. 
    
26. /* Private includes ----------------------------------------------------------*/
    : D! z) _5 N- N" d$ B5 P3 o
27. /* USER CODE BEGIN Includes */
    
28. 
    
29. /* USER CODE END Includes */
    
30. 
    
31. /* Private typedef -----------------------------------------------------------*/
    
32. /* USER CODE BEGIN PTD */
    
33. 
    8 H$ O" F; x4 _; m: q1 h
34. /* USER CODE END PTD */
    
35. 
    + `8 U7 F9 p" C4 O8 p- }2 c
36. /* Private define ------------------------------------------------------------*/
    
37. /* USER CODE BEGIN PD */
    
38. 
    " e# ?# P, a+ V
39. /* USER CODE END PD */
    
40. 
      T: m  B2 |$ d+ v* {" J: K
41. /* Private macro -------------------------------------------------------------*/
    9 c9 P8 y7 ]+ P6 d) A) G( ~
42. /* USER CODE BEGIN PM */
    
43. 
    0 P5 B! D  H$ R8 F# x( ~
44. /* USER CODE END PM */
    , v. A' y; N& O& m
45. 
    
46. /* Private variables ---------------------------------------------------------*/
    
47. static unsigned char counter=0;
    , M; R- ^" l2 S3 e$ H
48. static unsigned char flag=0;
    ; p& |9 P1 O: l/ J
49. /* USER CODE BEGIN PV */
    * v* e2 e6 f* m* c, S! F3 ]7 q
50. 
    
51. /* USER CODE END PV */
    ; b7 ^& W2 ]9 V& R: ?
52. 
    . h2 d3 e! M' F& p, G* P/ K
53. /* Private function prototypes -----------------------------------------------*/
    . j- R) q8 G1 t  `0 W
54. void SystemClock_Config(void);
    ' W0 {6 J. o6 c' B; K6 H
55. /* USER CODE BEGIN PFP */
    
56. 
    
57. /* USER CODE END PFP */
    
58. 
    
59. /* Private user code ---------------------------------------------------------*/
    * c7 [$ a. ~+ x4 z
60. /* USER CODE BEGIN 0 */
    . f' j/ Y! l& ~; l$ |
61. 
    
62. /* USER CODE END 0 */
    , C" w; |3 B- N: b+ ?# e( f/ S
63. 
    
64. /**
    
65.   * @brief  The application entry point.
    
66.   * @retval int
    
67.   */
    
68. int main(void)
    % R- E: A: O- Q' G; U
69. {
    * W" x: Y' x: h
70.   /* USER CODE BEGIN 1 */
    
71. 
    
72.   /* USER CODE END 1 */
    
73.   
    3 |* J4 b" X( H7 c
74. 
    9 k. M# G% O3 ]# G; t6 P
75.   /* MCU Configuration--------------------------------------------------------*/
    ) W; v; P% r7 j" L5 g: P
76. 
    % c& V6 v5 f# e  d8 i5 A. M+ n
77.   /* Reset of all peripherals, Initializes the Flash interface and the Systick. */
    
78.   HAL_Init();
    
79. 
    $ T5 i4 |" p& }
80.   /* USER CODE BEGIN Init */
    1 ~. W$ e+ X! g+ b4 e3 _. [& I
81. 
    
82.   /* USER CODE END Init */
    ) F2 u* g! O- p
83. 
      S4 }0 \/ q$ f# g* S0 N: z) Q8 w
84.   /* Configure the system clock */
    7 H& P" D. F; W  g7 f( ~7 H* r
85.   SystemClock_Config();
    1 j0 H0 h" k/ R" R: S
86. 
    - k0 s+ O6 }1 Q( o& V
87.   /* USER CODE BEGIN SysInit */
    2 x1 }9 N8 |) R/ ?/ n7 x) t
88. 
    
89.   /* USER CODE END SysInit */
    
90. 
    
91.   /* Initialize all configured peripherals */
    . h- f+ q3 x3 q# k9 {
92.   MX_GPIO_Init();
    ( a$ \) q9 `8 ]# Y6 V& [
93.   MX_TIM2_Init();
    . I( E1 `6 L  E. |5 z5 U
94.   /* USER CODE BEGIN 2 */
    
95.         HAL_TIM_Base_Start(&htim2);
    0 w0 ~4 G8 l  i* n5 o8 h
96.         HAL_TIM_PWM_Start(&htim2,TIM_CHANNEL_3);
    
97.   /* USER CODE END 2 */
    
98. 
    
99.   /* Infinite loop */
    
100.   /* USER CODE BEGIN WHILE */
     . P0 _; R4 ^  t3 f/ r* i( R! m
101.   while (1)
     
102.   {
     
103.     /* USER CODE END WHILE */
     2 Y4 F3 F  ?0 G4 T- T+ ]9 [
104.                 if(counter==0)
     4 U$ T6 H$ T5 E3 B
105.                         flag=0;
     + V* z1 z/ q% _% a, }% }
106.                 else if(counter==100)
     - S! s. V% s( t( z+ _3 D9 p
107.                         flag=1;
     ! f0 s" ?" C& _' [$ A. d" {
108.                 if(flag)
     
109.                         counter--;
     $ K8 B. m0 V2 O
110.                 else
     
111.                         counter++;
     
112.                 TIM2->CCR3=counter;
     4 [. l* n. Q3 r
113.                 HAL_Delay(10);
     
114.     /* USER CODE BEGIN 3 */
     , d! o5 i# T- G! v  w$ @+ E
115.   }
     
116.   /* USER CODE END 3 */
     
117. }
     
118. 
     % [0 z* ^: V1 M# n+ O1 `8 d
119. /**
     - {" L1 d4 Y3 G* n  W0 Z
120.   * @brief System Clock Configuration
     
121.   * @retval None
     7 w6 ^- X1 g) J" }# {6 F0 \) v
122.   */
     
123. void SystemClock_Config(void)
     1 [& l% w* I* t7 {) P( T% q9 O
124. {
     . G1 S! h% `; c* _1 k
125.   RCC_OscInitTypeDef RCC_OscInitStruct = {0};
     ! C- S# J6 u+ ~2 K' ]) }
126.   RCC_ClkInitTypeDef RCC_ClkInitStruct = {0};
     ' D+ w, @! u' S# Z, L
127. 
     : C# \7 [3 _2 O2 A1 _$ f  K4 t
128.   /** Configure the main internal regulator output voltage
     
129.   */
     
130.   __HAL_RCC_PWR_CLK_ENABLE();
     
131.   __HAL_PWR_VOLTAGESCALING_CONFIG(PWR_REGULATOR_VOLTAGE_SCALE1);
     
132.   /** Initializes the CPU, AHB and APB busses clocks
     6 D" P3 m& c: m3 O- p# }
133.   */
     & L! i5 y1 D; R: M
134.   RCC_OscInitStruct.OscillatorType = RCC_OSCILLATORTYPE_HSI;
     
135.   RCC_OscInitStruct.HSIState = RCC_HSI_ON;
     $ k' }6 g  f1 k
136.   RCC_OscInitStruct.HSICalibrationValue = RCC_HSICALIBRATION_DEFAULT;
     ! F- a1 d/ @9 r1 s) u$ L
137.   RCC_OscInitStruct.PLL.PLLState = RCC_PLL_NONE;
     
138.   if (HAL_RCC_OscConfig(&RCC_OscInitStruct) != HAL_OK)
     
139.   {
     3 z9 V0 `$ n/ T3 N7 E
140.     Error_Handler();
     
141.   }
     : C3 m" |1 J( k" N& p7 l; g/ ~
142.   /** Initializes the CPU, AHB and APB busses clocks
     : D* b# g% K- R
143.   */
     
144.   RCC_ClkInitStruct.ClockType = RCC_CLOCKTYPE_HCLK|RCC_CLOCKTYPE_SYSCLK
     
145.                               |RCC_CLOCKTYPE_PCLK1|RCC_CLOCKTYPE_PCLK2;
     . T) X/ z  c+ ]$ B. c/ o
146.   RCC_ClkInitStruct.SYSCLKSource = RCC_SYSCLKSOURCE_HSI;
     8 S% B+ C( a5 Q2 [0 O
147.   RCC_ClkInitStruct.AHBCLKDivider = RCC_SYSCLK_DIV1;
       o) d# E# G" a# ?$ @
148.   RCC_ClkInitStruct.APB1CLKDivider = RCC_HCLK_DIV1;
     7 W" L. ^4 |# J, I$ [
149.   RCC_ClkInitStruct.APB2CLKDivider = RCC_HCLK_DIV1;
     8 V& c& Y$ q- C4 D* z0 X
150. 
     6 _/ A# g! w9 [1 a5 ]
151.   if (HAL_RCC_ClockConfig(&RCC_ClkInitStruct, FLASH_LATENCY_0) != HAL_OK)
     
152.   {
     $ @2 `3 }4 _8 _% l3 K1 z- |
153.     Error_Handler();
     / b% X+ d( m/ P( n% S2 a+ O& ^
154.   }
     
155. }
     # X# W, U) U, s. \' F, w
156. 
     # R+ b1 d0 I% k5 R! e$ @4 G
157. /* USER CODE BEGIN 4 */
     
158. 
     - t/ D  @/ j# Y
159. /* USER CODE END 4 */
     
160. 
     
161. /**
     
162.   * @brief  This function is executed in case of error occurrence.
     
163.   * @retval None
     " c" f2 ]1 h% g# T2 x) q
164.   */
       j) ~, Z$ p, }, w! j. b! O
165. void Error_Handler(void)
     
166. {
     : @1 o  k2 n, F
167.   /* USER CODE BEGIN Error_Handler_Debug */
     
168.   /* User can add his own implementation to report the HAL error return state */
     % `& u3 G- E! F( k& S$ s$ Q
169. 
     , @5 p! V9 C- A4 R3 g# t9 x
170.   /* USER CODE END Error_Handler_Debug */
     
171. }
     , @, Y: T6 w2 V  o2 [( y6 y
172. 
     
173. #ifdef  USE_FULL_ASSERT
     6 ^2 I% h& u8 U7 e, z6 V8 B. r
174. /**
     
175.   * @brief  Reports the name of the source file and the source line number
     / Y/ x! b/ o( U1 H0 ]9 T
176.   *         where the assert_param error has occurred.
     4 P1 p+ V/ K" d0 Z" a
177.   * @param  file: pointer to the source file name
     
178.   * @param  line: assert_param error line source number
     % m* h/ Y6 m' g; m0 r1 ?9 a' `) L
179.   * @retval None
     & m; F3 ?2 n* D  w6 V0 ?# Q  v( j( f/ z
180.   */
     
181. void assert_failed(uint8_t *file, uint32_t line)
     7 j8 s) ~/ e6 u& I# t
182. {
     
183.   /* USER CODE BEGIN 6 */
     ' a3 ^: L4 h. }  a+ D& S+ I
184.   /* User can add his own implementation to report the file name and line number,
     5 `+ [( g! n) q2 T+ v0 A8 K
185.      tex: printf("Wrong parameters value: file %s on line %d\r\n", file, line) */
     
186.   /* USER CODE END 6 */
     
187. }
     / D, S$ Y# i! |' v% U/ }
188. #endif /* USE_FULL_ASSERT */
     
189. 
     ; G6 I$ @! K* j; Q
190. /************************ (C) COPYRIGHT STMicroelectronics *****END OF FILE****/
     " i" u7 A9 F, b1 e( S% u

复制代码

' A, M8 z8 h) c! h! p6 s
4 ^8 x; L& a+ J3. 总结

• TIM 的配置是本工程的核心
• 通过观察 LED 判断是否输出成功，当然有条件的可以使用 示波器 看看波形
• STM32 的基础配置用 CubeMX 很是方便
  & C& N. F% P* s

" l; u0 M1 V; W: A2 H2 s; `

只是输出PWM，不用 HAL_TIM_Base_Start(&htim2); 也可以吧