频率2.097Mhz , TIM2定时1s触发一次中断
! ^6 u: ~& o& \9 O* o6 D1.TIM2初始化8 r2 I/ f( p. S/ N
HAL_TIM_Base_Init>HAL_TIM_ConfigClockSource>HAL_TIMEx_MasterConfigSynchronization
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) F' B4 q3 r5 ~5 j" e- /**3 _. J3 K" B3 t
- * @brief TIM2 Initialization Function
7 c8 ^( I: x! `% V) Y! n - * @param None3 [: s# ?* f5 u( }6 n8 u% I, A
- * @retval None
* w- m( y; K" D ~$ S1 B9 v - */
" M6 w9 f; E5 u% ^- _ - TIM_HandleTypeDef htim2;( b* Q, y& Q. Y7 Z- V
- void MX_TIM2_Init(uint16_t time)
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- TIM_ClockConfigTypeDef sClockSourceConfig = {0};7 C9 M) k6 q' B4 A, O
- TIM_MasterConfigTypeDef sMasterConfig = {0};
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- htim2.Instance = TIM2;
6 i! C! S. a F% H - htim2.Init.Prescaler = 2000;/ _. g2 N" [8 F" i
- htim2.Init.CounterMode = TIM_COUNTERMODE_UP;
8 d2 Z1 o9 C% z - htim2.Init.Period = time - 1;, O3 c; e% E5 M( L3 e! q
- htim2.Init.ClockDivision = TIM_CLOCKDIVISION_DIV1;
" p8 m/ D! O4 Y - htim2.Init.AutoReloadPreload = TIM_AUTORELOAD_PRELOAD_DISABLE;
$ ~, c1 U# N' s: Z( }% Q: e9 { - if (HAL_TIM_Base_Init(&htim2) != HAL_OK)
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- Error_Handler();( w6 _/ W0 @3 Q7 j7 w+ b! {# O
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- sClockSourceConfig.ClockSource = TIM_CLOCKSOURCE_INTERNAL;
9 z* O! u5 E" c2 f( M% L - if (HAL_TIM_ConfigClockSource(&htim2, &sClockSourceConfig) != HAL_OK)
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- Error_Handler();
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- sMasterConfig.MasterOutputTrigger = TIM_TRGO_RESET;
5 K+ g# j4 V$ u1 W8 S1 y/ e- Y* T - sMasterConfig.MasterSlaveMode = TIM_MASTERSLAVEMODE_DISABLE;
! G% ]" o! u6 M! ^ [ - if (HAL_TIMEx_MasterConfigSynchronization(&htim2, &sMasterConfig) != HAL_OK)5 W; R; h, E$ P9 A0 s
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- Error_Handler();
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/ y1 Z- i' H1 _& l% [8 @2.TIM2 中断处理函数9 ?7 V) n# p0 y# @- R
- /**
: j( K0 x" a8 L- J; n - * @brief This function handles TIM2 global interrupt., |2 w4 K3 _1 [5 ]) V" G* |
- */
t5 r8 Y$ m/ W& E# T# m# e% A - void TIM2_IRQHandler(void)
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% b' p, x+ h8 g: ~5 U+ u - HAL_TIM_IRQHandler(&htim2);6 N! d- w* ^; h' `' r* \
- }
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( D' P6 A) Q) Z3.主函数main
# L8 {6 \ O& |8 H! ^8 Y- int main(void)
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- HAL_Init();
( z# P+ L4 X; A# m" A - /* Configure the system clock */, f% ^5 ~% [+ n6 z
- SystemClock_Config();
! p" ]' ~6 |' n }. K; e+ ]6 l/ e2 B - LED_Init();//LED初始化$ m Z$ M9 @% f
- MX_TIM2_Init(1001); //1s一次
- X& G' N8 ~) ]* b" t) S - HAL_TIM_Base_Stop_IT(&htim2);
j9 \% t' X+ G9 w5 F- {+ v7 ]/ Q - HAL_TIM_Base_Start_IT(&htim2);/ A$ F0 l& W8 F3 f' K
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- while(1)
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4.TIM中断回调处理函数6 i2 ?7 Q) T* S6 Y, @! ~& N4 x
- void HAL_TIM_PeriodElapsedCallback(TIM_HandleTypeDef *htim)
E# j4 N; M) }- ~ - {
8 P1 s% W. V2 B7 g! q - if(htim == &htim2)
4 S! N, n6 A4 ^7 F - {
! P7 G3 D" C5 a- d - HAL_GPIO_TogglePin(GPIOB,GPIO_PIN8);; k: o. P+ D# |; d/ r4 S+ g4 n
- }
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