第十个实验 TIMER 定时器的配置及使用 代码亲测可用

#include "stm32f10x.h"
uint16_t TIM_Count;
#define LED1 1
#define LED3 3
void LEDXToggle(uint8_t ledx);
void TIM2_delay(u16 time);

int main()
{
  GPIO_InitTypeDef  GPIO_InitStructure; 
    RCC_APB2PeriphClockCmd(RCC_APB2Periph_GPIOC,ENABLE);
  GPIO_InitStructure.GPIO_Pin =GPIO_Pin_13;//?????GPIO??
    GPIO_InitStructure.GPIO_Mode = GPIO_Mode_Out_PP; //?????????????      
    GPIO_InitStructure.GPIO_Speed = GPIO_Speed_50MHz;//???????50MHZ        
    GPIO_Init(GPIOC, &GPIO_InitStructure);//?????,???GPIO
 

 
  TIM_TimeBaseInitTypeDef  TIM_BaseInitStructure;   //¶¨ÒåÒ»¸ö¶¨Ê±Æ÷½á¹¹Ìå±äÁ¿
  RCC_APB1PeriphClockCmd(RCC_APB1Periph_TIM2, ENABLE);    //ʹÄܶ¨Ê±Æ÷2
  TIM_DeInit( TIM2);//½«IM2¶¨Ê±Æ÷³õʼ»¯Î»¸´Î»Öµ
  TIM_InternalClockConfig(TIM2);//ÅäÖà TIM2 ÄÚ²¿Ê±ÖÓ
  TIM_BaseInitStructure.TIM_Period = 1000;//ÉèÖÃ×Ô¶¯ÖØÔؼĴæÆ÷ֵΪ×î´óÖµ 0~65535Ö®¼ä  1000000/1000=1000us=1ms             
  //TIM_Period£¨TIM1_ARR£©=1000£¬¼ÆÊýÆ÷ÏòÉϼÆÊýµ½1000ºó²úÉú¸üÐÂʼþ£¬¼ÆÊýÖµ¹éÁã Ò²¾ÍÊÇ 1MS²úÉú¸üÐÂʼþÒ»´Î
  TIM_BaseInitStructure.TIM_Prescaler = 71;//×Ô¶¨ÒåÔ¤·ÖƵϵÊý£¬Ìṩ¸ø¶¨Ê±Æ÷µÄʱÖÓ 0~65535Ö®¼ä
              //ÉèÖÃÔ¤·ÖƵÆ÷·ÖƵϵÊý71£¬¼´CK_INT=72M, TIM1_CLK=72/72=1MHz
  TIM_BaseInitStructure.TIM_ClockDivision = TIM_CKD_DIV1; //ʱÖÓ·Ö¸îΪ0
  TIM_BaseInitStructure.TIM_CounterMode = TIM_CounterMode_Up;  
              //TIMÏòÉϼÆÊýģʽ ´Ó0¿ªÊ¼ÏòÉϼÆÊý£¬¼ÆÊýµ½1000ºó²úÉú¸üÐÂʼþ
  TIM_TimeBaseInit(TIM2, &TIM_BaseInitStructure); //¸ù¾ÝÖ¸¶¨²ÎÊý³õʼ»¯TIMʱ¼ä»ùÊý¼Ä´æÆ÷
  TIM_ClearFlag(TIM2, TIM_FLAG_Update);//ÇåÖжϣ¬ÒÔÃâÒ»ÆôÓÃÖжϺóÁ¢¼´²úÉúÖжÏ
  TIM_ARRPreloadConfig(TIM2, DISABLE);//½ûÖ¹ARR ԤװÔØ»º³åÆ÷
  TIM_ITConfig(TIM2, TIM_IT_Update, ENABLE);//ʹÄÜTIM2ÖжÏÔ´
  TIM_Cmd(TIM2, ENABLE);//TIM2×Ü¿ª¹Ø£º¿ªÆô
  
  NVIC_InitTypeDef NVIC_InitStructure;
  NVIC_PriorityGroupConfig(NVIC_PriorityGroup_0);   //ÉèÖÃÖжÏ×éΪ2
  NVIC_InitStructure.NVIC_IRQChannel = TIM2_IRQn;   //ÖжÏʼþΪTIM2
  NVIC_InitStructure.NVIC_IRQChannelPreemptionPriority = 0;  //ÇÀÕ¼ÓÅÏȼ¶0  
  NVIC_InitStructure.NVIC_IRQChannelSubPriority = 1;      //ÏìÓ¦ÓÅÏȼ¶1
  NVIC_InitStructure.NVIC_IRQChannelCmd = ENABLE;         //ÔÊÐíÖжÏ
  NVIC_Init(&NVIC_InitStructure);      
  

}
 
  void LEDXToggle(uint8_t ledx)
  {
   
    GPIOC->ODR^=GPIO_Pin_13;
  }
 
 void TIM2_IRQHandler(void)
 { 
  static uint16_t count=0;
  if (TIM_GetITStatus(TIM2, TIM_IT_Update) != RESET)   //ÅжÏÖжϱê־λÊÇ·ñΪ1£»Îª1ÔòÖжÏÏìÓ¦À²£¬0ÔòûÓÐ
  {
   TIM_ClearITPendingBit(TIM2, TIM_IT_Update);        //Çå³þÖжϹÒÆðλ
   count++;
   TIM_Count--;          //¶¨Ê±ÑÓʱ±äÁ¿¼õ1
   if(count==500)          //¼ÆÊýµ½500ms
   {
    LEDXToggle(LED1);       //ÒÔ0.5ÃëµÃÖÜÆÚÉÁ˸
    count=0;             //¼ÆÊýÇåÁã
   }   
  }
  
 }

  void TIM2_delay(u16 time)
  {
   TIM_Count = time;
   while(TIM_Count);
  }