【STM32】高级定时器TIM1计数中断配置

1. #include "Beep.h"
2. 
3. void Beep_Init(void)
4. {
5.  RCC_APB2PeriphClockCmd(RCC_APB2Periph_GPIOF, ENABLE);
6. 
7.  GPIO_InitTypeDef GPIO_InitStructure;
8.  GPIO_InitStructure.GPIO_Mode    = GPIO_Mode_Out_PP; //推挽输出
9.  GPIO_InitStructure.GPIO_Pin     = GPIO_Pin_0;
10.     GPIO_InitStructure.GPIO_Speed   = GPIO_Speed_10MHz;
11.     GPIO_Init(GPIOF, &GPIO_InitStructure);
12. 
13.     GPIO_SetBits(GPIOF, GPIO_Pin_0);    //置高，蜂鸣器不响
14. }
15. 
16. void TIM_UserConfig (uint16_t Period, uint16_t Prescaler)
17. {
18.     RCC_APB2PeriphClockCmd(RCC_APB2Periph_TIM1, ENABLE);
19. 
20.     TIM_TimeBaseInitTypeDef TIM_InitStructure;
21.     TIM_InitStructure.TIM_Period = Period;
22.     TIM_InitStructure.TIM_Prescaler = Prescaler;
23.     TIM_InitStructure.TIM_ClockDivision = TIM_CKD_DIV1; //不分割时钟
24.     TIM_InitStructure.TIM_CounterMode = TIM_CounterMode_Up; //向上计数
25.     TIM_InitStructure.TIM_RepetitionCounter = 0;    //重复计数次数，就是计数溢出即申请中断
26.     TIM_TimeBaseInit(TIM1, &TIM_InitStructure); //初始化定时器
27. 
28.     TIM_ClearITPendingBit(TIM1, TIM_IT_Update);//清除 TIM1 的中断待处理位，先清除，再开启中断
29.     TIM_ITConfig(TIM1, TIM_IT_Update | TIM_IT_Trigger, ENABLE);//开启计数器中断（定时器1，计数|触发中断源，使能）
30.     TIM_Cmd(TIM1, ENABLE);//使能计数器
31. 
32.     NVIC_InitTypeDef NVIC_InitStructure;
33.     NVIC_PriorityGroupConfig(NVIC_PriorityGroup_0); //设置中断分组0，主优先级0，抢占优先级3
34.     NVIC_InitStructure.NVIC_IRQChannel = TIM1_UP_IRQn;//中断入口
35.     NVIC_InitStructure.NVIC_IRQChannelPreemptionPriority = 0;
36.     NVIC_InitStructure.NVIC_IRQChannelSubPriority = 3;
37.     NVIC_Init(&NVIC_InitStructure);
38. 
39. }
40. 
41. void TIM1_UP_IRQHandler(void)
42. {
43.     //获取中断状态
44.     if( TIM_GetITStatus(TIM1, TIM_IT_Update) != RESET ) //只要不等于0，就代表进来中断了
45.     {
46.         GPIO_WriteBit(GPIOF, GPIO_Pin_0, (BitAction)(!GPIO_ReadOutputDataBit(GPIOF, GPIO_Pin_0)));
47.         //进入中断，先把这个TIM_IT_Update清零
48.         TIM_ClearITPendingBit(TIM1, TIM_IT_Update);
49.     }
50. }
51.

1. #ifndef __BEEP_H__
2. #define __BEEP_H__
3. 
4. #include "stm32f10x.h"                  // Device header
5. 
6. void Beep_Init(void);
7. void TIM_UserConfig (uint16_t Period, uint16_t Prescaler);
8. 
9. #endif
10.

1. #include "stm32f10x.h"                  // Device header
2. #include "Delay.h"
3. #include "LED.h"
4. #include "Beep.h"
5. 
6. int main(void)
7. {
8.  Delay_Init(72);
9.  LED_Init();
10.     Beep_Init();
11.     TIM_UserConfig (1000-1, 7200-1);
12.     /*   72M
13.     如果7200分频，7200 0000 /7200 = 10000，就是1s计数10000
14.     1ms计数10个   100us计数1个
15. 
16.     写1000，就是计数100ms  */
17. 
18.     while(1)
19.     {
20.     }
21. }