【STM32】基本定时器TIM6&TIM7自定义时长

1. #define LED0     GPIO_Pin_5
2. #define LED0_PORT  GPIOB //PB5
3. #define LED1     GPIO_Pin_5
4. #define LED1_PORT  GPIOE //PE5
5. 
6. 
7. void LED_Init(void)
8. {  
9.  //这里的时钟一定要开对呀！！！！！！
10.   RCC_APB2PeriphClockCmd(RCC_APB2Periph_GPIOE, ENABLE);
11.   RCC_APB2PeriphClockCmd(RCC_APB2Periph_GPIOB, ENABLE);
12. 
13.   GPIO_InitTypeDef GPIO_InitStructure;  //初始化结构体
14.   GPIO_InitStructure.GPIO_Mode = GPIO_Mode_Out_PP;
15.   GPIO_InitStructure.GPIO_Pin = LED0;
16.   GPIO_InitStructure.GPIO_Speed = GPIO_Speed_50MHz;
17.   GPIO_Init(LED0_PORT, &GPIO_InitStructure);
18.   GPIO_SetBits(LED0_PORT, LED0);  //置高电平，默认熄灭
19. 
20.   GPIO_InitStructure.GPIO_Mode = GPIO_Mode_Out_PP;
21.   GPIO_InitStructure.GPIO_Pin = LED1;
22.   GPIO_InitStructure.GPIO_Speed = GPIO_Speed_50MHz;
23.   GPIO_Init(LED1_PORT, &GPIO_InitStructure);
24.   GPIO_SetBits(LED1_PORT, LED1);  
25. }

1. void TIM6_Config(uint16_t Period, uint16_t Prescaler)
2. {
3.  RCC_APB1PeriphClockCmd(RCC_APB1Periph_TIM6, ENABLE);  //挂载在APB1总线上
4.  TIM_TimeBaseInitTypeDef TIM_InitStructure;
5.  NVIC_InitTypeDef NVIC_InitStructure;
6. 
7.  TIM_InitStructure.TIM_Period = Period;
8.  TIM_InitStructure.TIM_Prescaler = Prescaler;
9.  TIM_InitStructure.TIM_ClockDivision = TIM_CKD_DIV1;
10.   TIM_InitStructure.TIM_CounterMode = TIM_CounterMode_Up; //基本定时器只支持向上计数
11.   TIM_InitStructure.TIM_RepetitionCounter = DISABLE;  //重复计数次数，基本定时器也不支持
12.   TIM_TimeBaseInit(TIM6, &TIM_InitStructure);
13. 
14.   TIM_ClearITPendingBit (TIM6, TIM_IT_Update);//先清除中断标志位
15.   TIM_ITConfig(TIM6, TIM_IT_Update | TIM_IT_Trigger, ENABLE); //使能
16.   TIM_Cmd(TIM6, ENABLE);
17. 
18.   NVIC_PriorityGroupConfig(NVIC_PriorityGroup_0);
19.   NVIC_InitStructure.NVIC_IRQChannel = TIM6_IRQn;
20.   NVIC_InitStructure.NVIC_IRQChannelPreemptionPriority = 1;
21.   NVIC_InitStructure.NVIC_IRQChannelSubPriority = 0;
22.   NVIC_InitStructure.NVIC_IRQChannelCmd = ENABLE;
23.   NVIC_Init(&NVIC_InitStructure);
24. }

1. void TIM6_IRQHandler(void)//500ms基准定时
2. {
3.  static uint8_t LED_Count;
4.  if (TIM_GetITStatus (TIM6, TIM_IT_Update) == SET )
5.  {
6.    //如果读到0，给1，否则给0,实现500ms翻转电平
7.    ( GPIO_ReadOutputDataBit(LED0_PORT, LED0) == RESET )    \
8.    ? GPIO_SetBits(LED0_PORT, LED0)               \
9.    : GPIO_ResetBits(LED0_PORT, LED0);  //三目运算符，更简洁
10. 
11.     LED_Count++;
12.     if (LED_Count >= 2) //两次计数为1s
13.     {
14.       ( GPIO_ReadOutputDataBit(LED1_PORT, LED1) == RESET )  \
15.       ? GPIO_SetBits(LED1_PORT, LED1)             \
16.       : GPIO_ResetBits(LED1_PORT, LED1);
17.       LED_Count = 0;
18.     }
19.     TIM_ClearITPendingBit (TIM6, TIM_IT_Update);  //清除中断标志位
20.   }
21. }

1. #include "stm32f10x.h"                  // Device header
2. #include "Delay.h"
3. #include "LED.h"
4. #include "Timer6.h"
5. 
6. int main(void)
7. {
8.  Delay_Init (72);
9.  LED_Init();
10.   TIM6_Config (10000-1 , 3600-1); //500ms定时
11.   /*
12.   3600分频，72000000/3600 = 20000,  1s计数两万
13.   500ms = 0.5s   0.5s*20000 = 10000
14.   */
15.   while(1)
16.   { }
17. }
18. 
19. /***********************************END OF FILE***********************************/