1. 配置STM32CubeMX
/ h6 Q ~' N! R
3 w: F& R6 X# l- N2 a, P( M# 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。 / e( S( o! L4 y4 a% T! F/ I4 F
核心配置: $ G1 g* |, T! E9 M5 r8 y! f
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。" ~! m1 Z# k" R3 i3 y
. S8 d8 L7 }+ Y$ X- v- g# j
1.1 TIM2 的 Mode 配置
) ?7 v) S3 `" I7 I- ]" A Y8 R$ h4 a2 P Q
. E% }7 O' i0 r9 w9 M
/ ^& ]6 E" u& Q. F% a- M1.2 TIM2 的 Configuration 配置
1 C. `. Q" [6 d3 M: X
c0 Q2 z' f0 T0 J$ P4 I; s" s& T3 N
& L; L5 Z* X8 L. l
9 v5 A# J6 \6 {! O+ N( m* L: \5 g, [) c: Y
1.3 其余 GPIO 配置0 c; x( M* |+ a5 e8 A; i; @
$ Q4 F" V6 n' c" `" l& D/ n: MPA2 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。 z: W7 @: u8 V( i$ R4 P" ~
7 o& D/ @% H) b/ ^
$ Q' C8 _+ R4 Q
* j0 j$ R2 H2 L, `6 m W. e
& y1 V& I5 l% K
. N. }7 E9 y$ a余下步骤可参见:【STM32】CubeMX+HAL 点亮LED 的【1.10】~【1.13】步骤。 7 i! i+ i: ]7 {% X: t
2. 添加代码$ A" g& [2 p8 J5 `/ K, l2 X
5 A- x5 A3 s1 f$ J8 K$ T3 x
下面贴出主要代码:
# w4 Q$ x0 l6 \* \6 X
. w( a# }) J, X2.1 gpio.c
4 E) B* }1 X7 B9 |# c: z* L. O5 I( ?
- /**# J7 ^% `4 i5 u- Y: m
- ******************************************************************************
: q( K) @$ I) A& U1 N - * File Name : gpio.c1 h# b# z# `1 i( x# `1 x3 Y5 z' `
- * Description : This file provides code for the configuration
/ A% l& r& N7 O& S" e - * of all used GPIO pins.+ ?8 |+ m7 ~ l, B
- ******************************************************************************2 o! \- A9 a0 E! v7 I6 v, O
- * @attention+ P; A7 y9 W' Y1 s& f6 q& |8 O$ |
- *
. X6 P4 w$ ~" m, n; a9 m! N - * <h2><center>© Copyright (c) 2020 STMicroelectronics.# K+ v- N4 t+ d* |
- * All rights reserved.</center></h2>
/ F7 L8 i- o* j! Z5 f$ p4 E - *) v0 V, J8 u9 x9 m, U
- * This software component is licensed by ST under BSD 3-Clause license,$ k, E6 w( R. I- P- ^
- * the "License"; You may not use this file except in compliance with the
" F5 q8 _9 ^+ p. U6 Z' s% v - * License. You may obtain a copy of the License at:$ E! y' d' ^$ z8 x" Y( c( u
- * opensource.org/licenses/BSD-3-Clause
+ m* {! @6 X" y) L2 P4 |* P! P! G - *; s' y+ M6 i/ T& z4 o$ y
- ******************************************************************************7 _& n/ v0 r _ X! `8 Q5 z! r
- */! p: c5 o! k$ h: T9 [
0 T# h4 ]9 ~! D* l U1 A. p7 D- /* Includes ------------------------------------------------------------------*/
4 w" F) T0 |5 G! Y4 ~* e% I' W [ - #include "gpio.h"
5 z8 T' N$ P J - /* USER CODE BEGIN 0 */! i0 [' j9 H. [' h9 |
]* {1 E1 I7 @2 N z- /* USER CODE END 0 */
) A5 @( I4 C3 [( Y2 X
# A1 R+ ?1 a* K$ H2 Q1 t3 C/ Y4 l- /*----------------------------------------------------------------------------*/
+ g( E. ]7 C+ T, G% U5 `" _ - /* Configure GPIO */
9 N' u& Z5 q% Y+ R4 [& s - /*----------------------------------------------------------------------------*/$ g8 E" w. g- O7 @$ t. [
- /* USER CODE BEGIN 1 */
z) v5 |1 N5 K" D - " L3 Y2 ?/ h! ?' M0 f
- /* USER CODE END 1 */; ?3 F* e% ?* T3 R$ T
- $ _/ V8 e2 b8 T+ D1 x; Q
- /** Configure pins as
: M6 F- i: V5 p, B; c% z - * Analog 7 W) ]; P, }/ j4 J( a: k# H
- * Input 1 e1 {' L/ ]4 ?' q8 j
- * Output
_' }+ g, N; g* v- \# w - * EVENT_OUT
* S( H9 v& R4 A - * EXTI c5 X* i9 n5 W9 x# @3 F' I: C
- */5 j2 X1 C: X1 t- E8 {$ Y" _$ h7 {9 t+ s* h
- void MX_GPIO_Init(void)
( f5 Q) p) F& ?, m6 K - {6 \6 @9 O7 D$ q
. e, g: {2 P ?& {2 l$ K. Z- s- GPIO_InitTypeDef GPIO_InitStruct = {0};' h9 g/ t+ V( T5 A( w1 X; E4 o
- - G, A0 @4 c1 _: d, v
- /* GPIO Ports Clock Enable */+ h8 U! F/ s r' w. k5 o
- __HAL_RCC_GPIOC_CLK_ENABLE();
+ b% O: h; Z4 ~ - __HAL_RCC_GPIOH_CLK_ENABLE();
* _' A! ]3 x8 g* g8 Z6 }* P - __HAL_RCC_GPIOA_CLK_ENABLE();
/ Y7 S9 S* W% X2 u. a" y3 }' s - # H# q& P. q9 y( Y/ D- a
- /*Configure GPIO pin : PA6 */" l' C n$ ?$ L8 h0 }! { n9 K
- GPIO_InitStruct.Pin = GPIO_PIN_6;
0 W5 Z9 G/ P% Z' M% R - GPIO_InitStruct.Mode = GPIO_MODE_INPUT; Y+ `) G; e& r# D1 A% V- e
- GPIO_InitStruct.Pull = GPIO_NOPULL;) }: c( x! ?' O1 V: W3 @6 Q+ \
- HAL_GPIO_Init(GPIOA, &GPIO_InitStruct);
* V, v) K2 A$ l$ N - A; q% c2 F3 |, q6 b, y7 ?
- }. _ L1 h9 M+ c8 u
% V- _* M3 \/ ^1 i- H, T" w- /* USER CODE BEGIN 2 */4 `6 |! U& ?, V+ v
- / w9 b) k& Q3 o: `+ O5 X% `. D
- /* USER CODE END 2 */
+ l; R' m2 X" z& N
|: M$ J O* p0 Z8 _# }8 h) }/ H- /************************ (C) COPYRIGHT STMicroelectronics *****END OF FILE****/# d4 Z) b$ b% b+ h U8 C2 {, M+ c
复制代码
- h( f3 @2 b' C7 h7 m3 n: \
+ [+ B& m* L! F& q& \2.2 time.c
r) f0 V4 }5 I& r2 N* u% Q4 Y5 L3 V, P7 @; j) }
- /**
+ d% X6 d" ~1 M5 G8 E - ******************************************************************************
X/ v8 F9 b' g8 O - * File Name : TIM.c4 D2 l. \* G5 }
- * Description : This file provides code for the configuration x9 C3 P* k/ x8 M
- * of the TIM instances.
/ D3 g. ]+ z3 \3 Y$ h: \! r - ******************************************************************************5 q5 @5 S9 f+ J" ~# T) Q6 W2 u1 k
- * @attention h E" A$ v# }3 Y$ ]
- *
9 h! u% _% U+ a# L - * <h2><center>© Copyright (c) 2020 STMicroelectronics.
% \+ J, I# G: k7 h& {4 l - * All rights reserved.</center></h2>
! J( y! z1 ]0 u; Y/ a \# o) n - *
" q% ~- N( N% B* E% W3 o - * This software component is licensed by ST under BSD 3-Clause license,
) A g) c- f# ^3 Z, T, P - * the "License"; You may not use this file except in compliance with the
, w0 {/ r: A" X( o - * License. You may obtain a copy of the License at:; p* A0 V6 N1 }3 T' d% ]
- * opensource.org/licenses/BSD-3-Clause
W( ^' I) Y( [$ K- K) |5 L7 J: [3 A5 h - *
1 l1 E5 B n8 f - ******************************************************************************) f4 Q2 Q6 a, ]
- */
4 t4 W: u. o2 D: g' T) I
2 `6 g8 d% Z$ V5 Q6 E3 H' N- /* Includes ------------------------------------------------------------------*/
5 a( Z- C! o' p0 ?, R$ x9 I2 A" D: W - #include "tim.h"
: ^$ ~$ h7 ^) h! x; S: y
( t* M8 R( Z7 G- /* USER CODE BEGIN 0 */7 `' Y& E/ T0 ?$ @8 j/ k9 n4 v) Q
) c9 E: K) s# H9 H- I# Q- /* USER CODE END 0 */3 c$ Z& y# r& t1 |" E
- m6 ~% G5 n+ L8 w
- TIM_HandleTypeDef htim2;3 h4 ~7 a$ s' e6 S5 s+ n, Z4 J. h
. y g2 T: f; O4 S- /* TIM2 init function */' K( L0 x# f6 O: E
- void MX_TIM2_Init(void)
3 u5 H# t# z; H [$ n - { `- W5 H0 t6 o5 Z( W- p! |
- TIM_ClockConfigTypeDef sClockSourceConfig = {0};) I" N) P- e" z" A1 o' m9 @
- TIM_MasterConfigTypeDef sMasterConfig = {0};/ B% y& h2 K7 y- X6 F2 w$ @/ v
- TIM_OC_InitTypeDef sConfigOC = {0};
* h5 f) ~8 q1 i2 N
6 I s1 V0 O. K5 \- htim2.Instance = TIM2;
' k& Z% p% l' q; G - htim2.Init.Prescaler = 80-1;; @7 A' i# n: {
- htim2.Init.CounterMode = TIM_COUNTERMODE_UP;
9 i6 P: U( p% ?& z+ L3 F - htim2.Init.Period = 100;
! S8 w# V5 |: B$ ~5 } - htim2.Init.ClockDivision = TIM_CLOCKDIVISION_DIV1;
) y7 h: e* }) h' n- K; K - htim2.Init.AutoReloadPreload = TIM_AUTORELOAD_PRELOAD_DISABLE;
; a8 o0 t6 i# \+ @$ B' E - if (HAL_TIM_Base_Init(&htim2) != HAL_OK)
+ P2 ~& z2 l! N; Q - {6 p" Q+ d- ?1 p
- Error_Handler();3 E0 {3 a2 n( K9 ?3 B
- }4 G! M. f! d1 [- J9 {& ~
- sClockSourceConfig.ClockSource = TIM_CLOCKSOURCE_INTERNAL;7 `% o2 J' F& C+ A. A
- if (HAL_TIM_ConfigClockSource(&htim2, &sClockSourceConfig) != HAL_OK)) k, u# F8 e; z( J1 {
- {- [" {( {6 r$ q- |1 l& }6 [
- Error_Handler();
/ o4 f7 P/ C$ _9 X+ i' R - }
% U+ X4 m# J) b. N( P Y- j - if (HAL_TIM_PWM_Init(&htim2) != HAL_OK)* P! W* x# k% c# |
- {
; U9 f; ~$ I- w, j# t8 p - Error_Handler();
) D7 _6 `- h: T8 V - }7 l3 g- v& v) F3 c; c4 m
- sMasterConfig.MasterOutputTrigger = TIM_TRGO_RESET;$ j- b/ n7 P& T' Y4 v9 V
- sMasterConfig.MasterSlaveMode = TIM_MASTERSLAVEMODE_DISABLE;
" `4 a' M( Q) }5 h' u% a+ r2 Z( K - if (HAL_TIMEx_MasterConfigSynchronization(&htim2, &sMasterConfig) != HAL_OK): W" w" f5 s- Y0 p/ ]
- {
' |- `1 p2 O) t - Error_Handler();5 _* B8 n" s9 E" M- ?
- }$ j1 ^9 |8 w1 I; y
- sConfigOC.OCMode = TIM_OCMODE_PWM1;
3 j2 n% p/ |8 Y: g( f - sConfigOC.Pulse = 0;0 X" s* ?# [8 d3 D: O
- sConfigOC.OCPolarity = TIM_OCPOLARITY_HIGH;& O. u% H! a6 B' {8 e; d- M! H" _
- sConfigOC.OCFastMode = TIM_OCFAST_DISABLE;0 |* U8 t6 r7 [
- if (HAL_TIM_PWM_ConfigChannel(&htim2, &sConfigOC, TIM_CHANNEL_3) != HAL_OK)
5 i8 n6 v% C! n! r' \9 P j - {) l5 {8 f7 _. t% Q4 P
- Error_Handler();
6 x) x( W) M2 e/ x - }6 i6 h+ [1 P' X/ J% B; l
- HAL_TIM_MspPostInit(&htim2);
8 ^8 t1 a4 ~2 T+ q9 O
8 A7 S) A9 \: ]! R' P4 J- }% q5 Q! q: @3 ]1 O$ Z
- 2 V% ?/ B* L; }) N! S% }
- void HAL_TIM_Base_MspInit(TIM_HandleTypeDef* tim_baseHandle)
7 @+ u( O: I% T8 ?* } T: c4 l - {
. q" P" C, S8 V0 S
. _3 ?! s3 O+ c/ N( _# J4 `7 y7 o7 \- if(tim_baseHandle->Instance==TIM2)
0 f6 J4 k* @. U) r2 H4 O - {
& P5 V& e7 D* v/ K; }6 U# Q6 C - /* USER CODE BEGIN TIM2_MspInit 0 */) a/ n- [' D5 M8 d% O0 k
- & \: P, X( [. J
- /* USER CODE END TIM2_MspInit 0 */5 ^5 F/ b. c! g, N- W
- /* TIM2 clock enable */5 p1 k0 {* `7 e9 J
- __HAL_RCC_TIM2_CLK_ENABLE();
7 \" n, G, A! } - /* USER CODE BEGIN TIM2_MspInit 1 */
% N j7 y- n# C* X
! F/ W: u9 b8 o& ]- /* USER CODE END TIM2_MspInit 1 */% t- H# |: L* I/ H% r8 z
- }
1 U! Y4 X* F$ \* y/ s - }4 p4 Y' ]- U0 H% p) X/ K
- void HAL_TIM_MspPostInit(TIM_HandleTypeDef* timHandle)
' r* T5 M% `2 u$ G# W; D [ - {
7 {) d; K6 D4 Y: H7 Q! u2 Z- e - & ^( w7 G5 F! P/ z* X1 c8 d
- GPIO_InitTypeDef GPIO_InitStruct = {0};
7 X' e3 k) a: D - if(timHandle->Instance==TIM2)
" ^9 L* ~3 M$ E/ P7 T# X8 }6 T - {
' E0 [# N0 U: f' e$ x& W6 s - /* USER CODE BEGIN TIM2_MspPostInit 0 */
/ b1 U( N6 z! ]! o& l" V - % e. b$ x7 h* g. I d! r% T+ n
- /* USER CODE END TIM2_MspPostInit 0 */+ V/ q8 [7 O$ v( h9 l( Q
-
) @$ ~9 L2 O: S* F2 h7 T. h" c/ M$ E z - __HAL_RCC_GPIOA_CLK_ENABLE();2 \' J5 f1 Y% ^4 ~& E
- /**TIM2 GPIO Configuration
! L( r+ G2 T; T, x' l' S6 h0 V - PA2 ------> TIM2_CH3 , Q6 a2 \/ L: c( E% i
- */
+ L$ J& M8 k) E; u6 y' l1 _( i) x - GPIO_InitStruct.Pin = GPIO_PIN_2;
6 q- d; X6 z3 Q: ^ - GPIO_InitStruct.Mode = GPIO_MODE_AF_PP;
9 Q+ ~, `0 m9 }6 B' M; g& [3 h/ U - GPIO_InitStruct.Pull = GPIO_NOPULL;
, L* |6 \. x- b - GPIO_InitStruct.Speed = GPIO_SPEED_FREQ_LOW;
* E( m1 n; s4 a, V. z - GPIO_InitStruct.Alternate = GPIO_AF1_TIM2;0 m% z% A$ R: o# `! u4 n. E
- HAL_GPIO_Init(GPIOA, &GPIO_InitStruct);
# Z5 v" N; {1 o! }
& L6 y$ E0 e. I- /* USER CODE BEGIN TIM2_MspPostInit 1 */
+ t$ m' R: d. y' w. N& V5 I' x
& {/ j6 [5 v! M" I" c) S( K+ u, d3 O- /* USER CODE END TIM2_MspPostInit 1 */: ]( k7 P7 e2 e" y! [% ]
- }! `: J2 g$ s1 d' J5 ]. N
- : M$ J/ Y7 R2 s$ w, u* d3 `
- }
5 v. g: J6 _ k, _: c6 G X1 ]" q - ! D; o0 ]2 i9 h \4 g6 S
- void HAL_TIM_Base_MspDeInit(TIM_HandleTypeDef* tim_baseHandle)
+ C7 `3 E2 f& A - {
& Q3 _1 z6 }& D6 _' K8 I
6 m6 k: T9 H% x6 ?* z- if(tim_baseHandle->Instance==TIM2)' w1 D& v2 d7 T7 s4 s# H$ n9 d) O: Q
- {8 l1 [# g8 A, w( s# o( Y
- /* USER CODE BEGIN TIM2_MspDeInit 0 */
! ~) _7 H8 v' e
# K6 |9 `( {7 |+ C- /* USER CODE END TIM2_MspDeInit 0 */
& o. ]8 F: n. Q. p+ L: O, j - /* Peripheral clock disable */
7 U# i% U( T+ O% R' X. {; h - __HAL_RCC_TIM2_CLK_DISABLE();8 N1 j. u* x1 ?8 t4 h- Z2 d
- /* USER CODE BEGIN TIM2_MspDeInit 1 */9 y, B) J" [- e& p* G) {
' x+ Q# ~3 Q9 Z k4 D* D6 i8 I- /* USER CODE END TIM2_MspDeInit 1 */
% [; s* W6 q( w7 x - }" p; P; z- g/ Y& T6 j/ [
- }
: t0 c1 R! @9 p# C) {# i K! c- G - ! \0 E6 m# A7 t! g& P0 M
- /* USER CODE BEGIN 1 */
- W! a& f4 Y' F4 J - 4 w/ l* `3 i% v* `
- /* USER CODE END 1 */7 e7 ]% W. E& D& K
* ?0 N- z/ k) I' L- T- /************************ (C) COPYRIGHT STMicroelectronics *****END OF FILE****/# b4 y8 [0 E( \, y
复制代码 M; a7 E% l! n) H* q4 q* M
+ c% k/ g7 F) P/ J
' G* X, C1 Q) l( j/ l2.3 main.c8 l) d" G9 D# a) T9 m
# S! @& @: | A! I8 P; d0 O3 g5 i1 ]$ X
- /* USER CODE BEGIN Header */8 x9 y8 E+ L8 |- ~* U1 r
- /**( c/ \# [7 ^% p) Q2 }( Z0 F: Z
- ******************************************************************************
/ ~1 b9 W' [' G! j - * @file : main.c
6 D+ e& s B! W L6 G, L1 m - * @brief : Main program body
* z! I6 D' S- n0 g2 R8 H! L" C - ******************************************************************************- S* {" }2 Y x. d9 U
- * @attention- ~1 r9 H; ^7 S
- *" Y R* X7 a1 F# I. |( y
- * <h2><center>© Copyright (c) 2020 STMicroelectronics.
* F* Z+ E' b( ]7 u7 }0 U i) K) Y( V/ D - * All rights reserved.</center></h2>! t, [; ~4 O* q1 m& c" B8 U
- *7 f U+ n. }& r" e/ ~
- * This software component is licensed by ST under BSD 3-Clause license,
0 N7 \/ w0 ~; [+ r% O0 w) S - * the "License"; You may not use this file except in compliance with the
. d" @/ M+ d' H9 D4 O - * License. You may obtain a copy of the License at:' i: F+ \+ H0 _$ z+ q4 B( G
- * opensource.org/licenses/BSD-3-Clause
2 e" _$ p# l _' X/ W+ d5 Y# p - *. n- D5 i$ Z$ `: C
- ******************************************************************************, v% N7 K! F& z
- */
, M3 P; C, l, x# r" s6 L- A - /* USER CODE END Header */7 S% ^$ F" b) p" N( O
+ O9 Y7 [' B( c: }- /* Includes ------------------------------------------------------------------*/$ u7 e9 R6 l; s. b5 e
- #include "main.h"
4 z5 Y. S& m; ]1 a( K - #include "tim.h". [$ G( t2 j) J1 c" t! w, k
- #include "gpio.h"! R: I. T, W; T" }" N. f
- . ~1 v" q4 _4 b# y5 A
- /* Private includes ----------------------------------------------------------*/
8 q ]& p5 q# ~' J- l$ C - /* USER CODE BEGIN Includes */
[: p4 } X+ E5 d7 D; k# B
8 O0 J% X) J. K& u: k# {- /* USER CODE END Includes */- S8 S. N3 m1 W: F1 }
$ w4 f, \7 U6 u5 z$ I$ m- /* Private typedef -----------------------------------------------------------*/ M6 D9 ?# A: K! k2 a9 h& [
- /* USER CODE BEGIN PTD */% n: N9 ^, T) P% c8 l
- 2 O# S; n3 M! V
- /* USER CODE END PTD */
) Y3 {$ c% K% V7 i
- _) J$ _( Q. I3 U- [! q- /* Private define ------------------------------------------------------------*/ z; f2 d' g( U8 J4 ^
- /* USER CODE BEGIN PD */! R: E* x( D% ]1 x7 ?6 u4 Y0 q7 q
- ! ?) ~" o6 f) M: j" L' T- P# ?
- /* USER CODE END PD */# }- C4 ?$ s+ x. M& F$ V9 Y
- ' F+ \% x3 _3 G( u
- /* Private macro -------------------------------------------------------------*/3 I# e% s3 h9 ?" \: N. V1 |% {
- /* USER CODE BEGIN PM */
- _" r% s) A& m5 q+ |: \
) T) K. O f$ d' G. m- /* USER CODE END PM */9 F3 q& }7 Z: V( s8 F
. Q4 u0 u" T4 i! {' R6 i& {. ~- /* Private variables ---------------------------------------------------------*/* n3 n6 V) Z# K( i3 q
- static unsigned char counter=0;0 f9 P* j/ m4 ~( @" J
- static unsigned char flag=0;
3 w& Y6 q M1 X - /* USER CODE BEGIN PV */
# ~/ p* s; d4 m+ ~- o - ; P9 q3 @1 ?# B! K6 j
- /* USER CODE END PV */ s, {* Q5 B4 k( C! f5 a9 p
3 w& o! n, Y2 T+ T" Y, \& H- /* Private function prototypes -----------------------------------------------*/
4 n+ F1 b! J0 J2 g) q# k/ v1 y - void SystemClock_Config(void);
$ d$ j2 e" [1 J/ X2 l$ f6 M- N - /* USER CODE BEGIN PFP */4 e! T# Z+ |% Z1 z0 k5 _3 f
- % i* y- @% k" M! U
- /* USER CODE END PFP */
; W& |; `0 {" J - 0 ?' `( N: ?' t7 M
- /* Private user code ---------------------------------------------------------*/
' i. O" ^9 A; |7 e, r- ~ - /* USER CODE BEGIN 0 */- h4 |# Z, a3 ], e- F5 L) q9 Y# F
- 6 C+ A3 R0 J/ @$ Q1 j5 L6 j. J* b
- /* USER CODE END 0 */5 F5 E: W& L) z8 m( Q; J) m9 c
( s" u( H& M0 A7 U' D/ r0 X+ M- /**
. ]5 f0 W, |! V) @1 X - * @brief The application entry point.
, z" U4 d4 Z2 s, G9 z. P: `5 ^ - * @retval int
! x/ l! P9 A3 Y2 g - */ `- y" s7 P$ e$ d5 X8 j
- int main(void)4 F/ y, T9 X! L5 p% q
- {* _! _; v# Q2 o6 d2 D* i3 e9 T
- /* USER CODE BEGIN 1 */
- _/ T; l+ y3 t2 [4 ` - % x! s8 i& _5 J- l* U" r) B0 S
- /* USER CODE END 1 */
" p# A2 K3 Y* d' c) } -
0 X5 S# \( R2 e" T& S/ r+ Z. p$ c - - e8 d( R: m& q; J: m- b
- /* MCU Configuration--------------------------------------------------------*/7 k6 t) W4 f- O/ f9 k6 T2 ^2 i# t9 }
- # V" B; j5 c0 G% ^3 J- I
- /* Reset of all peripherals, Initializes the Flash interface and the Systick. */3 y! l" _8 `2 L [" ?" a- s
- HAL_Init(); {2 u9 z! ]" l. l+ N
- ! m9 v$ M2 P2 u$ H# e6 I4 k
- /* USER CODE BEGIN Init *// H" F, A( M' p% U M" E! X
- $ I8 L* E }! u8 Y5 K+ H1 J
- /* USER CODE END Init *// ?3 M. s3 [2 b, X3 Q
; Q5 N# S+ r" Q- j! q! N- /* Configure the system clock *// V3 [7 ?* l( t, d" @
- SystemClock_Config();
0 a2 J8 \$ s5 H& ]2 [ - 0 a' e0 i% [5 P0 u5 z. w
- /* USER CODE BEGIN SysInit */7 q" B& h+ M7 R! ~" [
, U3 @# q2 s# Y9 ?; ?' _- /* USER CODE END SysInit */. E" _. e u% K9 K. B! P: b
9 P& S2 z" m- S" Y+ O. k1 |# ^- /* Initialize all configured peripherals */
1 K' ?3 l3 ]5 U5 [ m: i F9 y - MX_GPIO_Init();
: H9 F8 D Q; R - MX_TIM2_Init();
3 P. {- n1 E' M2 W% i - /* USER CODE BEGIN 2 */
6 Z3 `- z! A" T5 O* |6 u8 F* M - HAL_TIM_Base_Start(&htim2);
+ b0 V( }$ S- w - HAL_TIM_PWM_Start(&htim2,TIM_CHANNEL_3);
( L: |' {$ @$ U3 p - /* USER CODE END 2 */ e$ t l) K- X( p- q* y
& l/ t& k. v0 L, G2 W( P' C6 X- /* Infinite loop */8 D& O: X3 q% b& G2 j
- /* USER CODE BEGIN WHILE */" ~9 z& s3 |/ X7 P: w0 H* N
- while (1)2 ]$ n& f) V6 c! s, Z
- {
- Q+ q8 l1 W: ~- X# N - /* USER CODE END WHILE */
) Y {: N1 \) m1 l6 }" ` - if(counter==0)
4 I* v$ m) J9 w7 u8 n - flag=0;
; g& u3 F+ r# ~ [ - else if(counter==100)7 Q/ \8 _" R4 W/ H
- flag=1;
$ |( H* ]* ?& `; H! U - if(flag)( a' n& [4 B, t" i8 L F: q* G
- counter--;# d! g% y& j4 M
- else3 D0 J2 H. i. I5 p% z
- counter++;) y# b, T5 E/ _# ~" t
- TIM2->CCR3=counter;
+ |$ _6 i! T4 y. N* [) e: L ~ - HAL_Delay(10);3 H8 o9 r5 S/ j- y
- /* USER CODE BEGIN 3 */
8 h: ~. F: h9 ` - }* b9 u5 x. K T6 h+ ~: `
- /* USER CODE END 3 */8 a; n$ l" _/ }/ B: U
- }
{5 K6 D4 I# c" U9 @3 c - ! Y/ l. o9 ^2 J$ L9 P
- /**
, ?: Y- Y4 n: T - * @brief System Clock Configuration
# ^1 W) {4 K2 ?; Z - * @retval None
6 O7 t0 X, c* k6 \8 ]8 r+ K - */& X: R9 I( M9 q9 k$ P. }1 J0 A
- void SystemClock_Config(void)7 N4 Z5 f1 r3 @/ L. L2 I. Q& F
- {, `. W( X+ W5 {, T; ]
- RCC_OscInitTypeDef RCC_OscInitStruct = {0};" ~2 z$ _- S- z% C, E6 n5 \# l* T
- RCC_ClkInitTypeDef RCC_ClkInitStruct = {0};
0 L2 `% h: q7 x* V) \5 g$ b - + ^4 g/ n) U) U" b) G1 _/ U3 \0 A
- /** Configure the main internal regulator output voltage 4 F3 u% b/ B( Y; A2 Y: T% v
- */
5 s3 P# r7 |/ ^ - __HAL_RCC_PWR_CLK_ENABLE();
' g% K$ u* T" B8 O" c+ R0 _ - __HAL_PWR_VOLTAGESCALING_CONFIG(PWR_REGULATOR_VOLTAGE_SCALE1);
2 Z% W5 Y X* t2 K5 g) R' J - /** Initializes the CPU, AHB and APB busses clocks
! k, a( H; P; _8 _ - */
2 w- p2 d8 u+ b0 W v9 t6 n0 i - RCC_OscInitStruct.OscillatorType = RCC_OSCILLATORTYPE_HSI;, m* {+ f2 e6 H! a! Z, ~; N* }( l! Y
- RCC_OscInitStruct.HSIState = RCC_HSI_ON;! m, r X8 m! Z* O) `
- RCC_OscInitStruct.HSICalibrationValue = RCC_HSICALIBRATION_DEFAULT;
7 G G( r. j$ b7 O( Q! N! Z - RCC_OscInitStruct.PLL.PLLState = RCC_PLL_NONE;
3 s5 t' _1 X* D1 @) t# k1 V - if (HAL_RCC_OscConfig(&RCC_OscInitStruct) != HAL_OK)4 W6 u$ L3 A0 a: L
- {
0 Q+ h, _0 I+ J% m1 x - Error_Handler();7 f8 ]1 u; v0 [( S t
- }; n) u% A0 Y7 }6 v
- /** Initializes the CPU, AHB and APB busses clocks 5 a) B! B& l8 R3 y7 p5 q9 l
- */+ G, Y9 y$ \* M. O; @
- RCC_ClkInitStruct.ClockType = RCC_CLOCKTYPE_HCLK|RCC_CLOCKTYPE_SYSCLK& b' c1 \ Y! I" k+ M8 S
- |RCC_CLOCKTYPE_PCLK1|RCC_CLOCKTYPE_PCLK2;5 L' m5 g3 i4 g# A' B0 N
- RCC_ClkInitStruct.SYSCLKSource = RCC_SYSCLKSOURCE_HSI;( P2 m. j" [$ H
- RCC_ClkInitStruct.AHBCLKDivider = RCC_SYSCLK_DIV1;2 r* _7 {2 c( Q
- RCC_ClkInitStruct.APB1CLKDivider = RCC_HCLK_DIV1;/ v- A: w& \6 g1 x$ o* n s" N
- RCC_ClkInitStruct.APB2CLKDivider = RCC_HCLK_DIV1;
9 [, i2 W0 p1 z7 V, c
# d4 l- _- g: s' Y+ z/ Q- if (HAL_RCC_ClockConfig(&RCC_ClkInitStruct, FLASH_LATENCY_0) != HAL_OK)) ~- A* B9 q. f: p
- {
/ e( ~) T3 w9 d/ m9 R6 z - Error_Handler();
6 n3 e9 ?2 Q. ~/ I( P/ C - }5 Z0 O/ [$ k4 l1 o
- }+ G8 H2 ]. q. E# R
- ( ~' t n+ ] Q8 H" u% M) |9 H2 X, t+ Z
- /* USER CODE BEGIN 4 */- T( N* t& S2 g, Q6 ], {2 g% u
6 H6 u6 G" S! t- /* USER CODE END 4 */
6 F' G2 U+ B; N2 v, S# x4 ?
2 a7 g+ M+ O0 Q3 ^9 G9 Z- ~; z- /**" @! E/ F$ G; K$ d# v1 a: \
- * @brief This function is executed in case of error occurrence.
) ?5 J1 d" X% O' h- J4 N9 d' T - * @retval None9 @7 K# P; b& X. ?+ p
- */
3 f. \& H! M, t/ N& }, c; O - void Error_Handler(void)/ x- T: q& o" v( F
- {
; m' Y( H# n/ a& Q7 a3 y9 H/ i - /* USER CODE BEGIN Error_Handler_Debug */
- a+ [$ @8 g& j1 T7 O6 V: |7 F% v# F - /* User can add his own implementation to report the HAL error return state */6 o- |2 w+ j! k9 j
- : S- G) ^0 Y( G; v! U3 ?9 b: l
- /* USER CODE END Error_Handler_Debug */
, x1 H# d2 J. ]* ?* A - }/ J/ R( y5 d. h8 {6 {
- ( V. C# ^1 o' s. m( u6 ?" S4 [
- #ifdef USE_FULL_ASSERT& \: A' V6 l8 | V
- /**0 b8 {# l7 r, j! p" }
- * @brief Reports the name of the source file and the source line number
' `/ v* ]% Q ] - * where the assert_param error has occurred.9 w4 V; U: T7 x8 K3 r) X
- * @param file: pointer to the source file name
8 [! k5 o) | |; H - * @param line: assert_param error line source number
$ Z7 \) ~. ?* y) Q2 f+ ~ - * @retval None! _8 m& d, C. [6 P/ m
- */% i) o3 E$ O* u3 Y m- P: [
- void assert_failed(uint8_t *file, uint32_t line)
: g. S6 I Q( o4 l; u5 I) ] - {
" ^( u {4 z6 {: C' }9 J" Y - /* USER CODE BEGIN 6 */ ~" R$ Y2 a5 _* e4 g
- /* User can add his own implementation to report the file name and line number,
* S. {( g; s @) ~ - tex: printf("Wrong parameters value: file %s on line %d\r\n", file, line) */
8 K& r0 q' f6 H - /* USER CODE END 6 */- u u* w6 S5 \! F' m
- }' E; Y5 X- |# q7 z
- #endif /* USE_FULL_ASSERT */$ y6 d1 l p `: K. q
- : h& W$ H) {" ~3 m+ \* X' @
- /************************ (C) COPYRIGHT STMicroelectronics *****END OF FILE****/' N; a2 O ^+ m
复制代码 & t* J9 D, a* t+ p
0 H9 I4 }# Q, t% M( A
3. 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; t1 k! w, Q* ~
& R7 `* w F$ d; D* X+ s5 N0 ^( `( M. ]
) L% c/ A# N: d* E) m9 L; H
|