stm32定时器2输出10KHZ波形

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/*! @function
********************************************************************************
<PRE>
º¯ÊýÃû   :RCC_Configuration
¹¦ÄÜ     :ʱÖÓÅäÖÃ
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²ÎÊý     :ÎÞ
·µ»ØÖµ   :ÎÞ
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ʹÓõÄÈ«¾Ö±äÁ¿£ºÎÞ
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×÷Õß     :          
ʱ¼ä     : 2012/10/17
</PRE>
*******************************************************************************/
static void RCC_Configuration(void)
{ 
 ErrorStatus HSEStartUpStatus; 

    RCC_ClocksTypeDef RccClocks;   
     
   RCC_DeInit();     
   RCC_HSEConfig(RCC_HSE_ON);  
   HSEStartUpStatus = RCC_WaitForHSEStartUp();  

   if(HSEStartUpStatus == SUCCESS)        
   {  
        /* Ñ¡ÔñHCLK£¨AHB£©Ê±ÖÓԴΪSYSCLK  1·ÖƵ */
     RCC_HCLKConfig(RCC_SYSCLK_Div1);
           
     /* Ñ¡ÔñPCLK2ʱÖÓԴΪ HCLK£¨AHB£© 1·ÖƵ */
     RCC_PCLK2Config(RCC_HCLK_Div1);
              
     /* Ñ¡ÔñPCLK1ʱÖÓԴΪ HCLK£¨AHB£© 2·ÖƵ */
     RCC_PCLK1Config(RCC_HCLK_Div2);    
     
        /* ÉèÖÃFLASHÑÓʱÖÜÆÚÊýΪ2 */
     FLASH_SetLatency(FLASH_Latency_2);    
     
        /* ʹÄÜFLASHԤȡ»º´æ */
     FLASH_PrefetchBufferCmd(FLASH_PrefetchBuffer_Enable); 
     
        /* Ñ¡ÔñËøÏà»·£¨PLL£©Ê±ÖÓԴΪHSE 1·ÖƵ£¬±¶ÆµÊýΪ9£¬ÔòPLLÊä³öƵÂÊΪ 8MHz * 9 = 72MHz */
     RCC_PLLConfig(RCC_PLLSource_HSE_Div1, RCC_PLLMul_9); 
     
        /* ʹÄÜPLL */
     RCC_PLLCmd(ENABLE); 
              
     /* µÈ´ýPLLÊä³öÎȶ¨ */
     while(RCC_GetFlagStatus(RCC_FLAG_PLLRDY) == RESET); 
     /* Ñ¡ÔñSYSCLKʱÖÓԴΪPLL */
     RCC_SYSCLKConfig(RCC_SYSCLKSource_PLLCLK); 

     /* µÈ´ýPLL³ÉΪSYSCLKʱÖÓÔ´ */
     while(RCC_GetSYSCLKSource() != 0x08); 
   }
   
    /* ÅäÖÃSysTick */
    RCC_GetClocksFreq(&RccClocks); 
    //SysTick_Config(RccClocks.HCLK_Frequency / OS_TICKS_PER_SEC); 
   
    /* ´ò¿ªGPIOʱÖÓ */
    RCC_APB2PeriphClockCmd(RCC_APB2Periph_GPIOA | RCC_APB2Periph_GPIOB | \
                        RCC_APB2Periph_GPIOC | RCC_APB2Periph_GPIOD| RCC_APB2Periph_GPIOE,\
                        ENABLE);
 RCC_APB1PeriphClockCmd(RCC_APB1Periph_TIM2, ENABLE);
}                                    

/*! @function
********************************************************************************
<PRE>
º¯ÊýÃû   :NVIC_Configuration
¹¦ÄÜ     :ÖжϿØÖÆÆ÷ÅäÖÃ
----------------------------------------------------------------------------------
²ÎÊý     :ÎÞ
·µ»ØÖµ   :ÎÞ
---------------------------------------------------------------------------------
ʹÓõÄÈ«¾Ö±äÁ¿£ºÎÞ
----------------------------------------------------------------------------------
×÷Õß     :          
ʱ¼ä     : 2012/10/17
</PRE>
*******************************************************************************/
static void NVIC_Configuration(void)
{
    NVIC_InitTypeDef NVIC_InitStructure;
         
#ifdef  VECT_TAB_RAM 
 /* Set the Vector Table base location at 0x20000000 */
 NVIC_SetVectorTable(NVIC_VectTab_RAM, 0x0);
#else  /* VECT_TAB_FLASH  */
 /* Set the Vector Table base location at 0x08000000 */
 NVIC_SetVectorTable(NVIC_VectTab_FLASH  , 0);  
#endif
 /* Configure one bit for preemption priority */
 NVIC_PriorityGroupConfig(NVIC_PriorityGroup_1); 
 
    /* Enable the USART1 Interrupt */ 
    NVIC_InitStructure.NVIC_IRQChannel = USART1_IRQn;
 NVIC_InitStructure.NVIC_IRQChannelSubPriority = 2;
 NVIC_InitStructure.NVIC_IRQChannelCmd = ENABLE;
 NVIC_Init(&NVIC_InitStructure);

 /* Enable the USART2 Interrupt */
 NVIC_InitStructure.NVIC_IRQChannel = USART2_IRQn;
 NVIC_InitStructure.NVIC_IRQChannelSubPriority = 2;
 NVIC_InitStructure.NVIC_IRQChannelCmd = ENABLE;
 NVIC_Init(&NVIC_InitStructure);
   
    /* Enable the USART3 Interrupt */
 NVIC_InitStructure.NVIC_IRQChannel = USART3_IRQn;
 NVIC_InitStructure.NVIC_IRQChannelSubPriority = 2;
 NVIC_InitStructure.NVIC_IRQChannelCmd = ENABLE;
 NVIC_Init(&NVIC_InitStructure); 
  /* Enable the TIMER3 Interrupt */
 NVIC_InitStructure.NVIC_IRQChannel = TIM3_IRQn;
 NVIC_InitStructure.NVIC_IRQChannelSubPriority = 2;
 NVIC_InitStructure.NVIC_IRQChannelCmd = ENABLE;
 NVIC_Init(&NVIC_InitStructure);
  /* Enable the TIMER3 Interrupt */
 NVIC_InitStructure.NVIC_IRQChannel = TIM2_IRQn;
 NVIC_InitStructure.NVIC_IRQChannelSubPriority = 2;
 NVIC_InitStructure.NVIC_IRQChannelCmd = ENABLE;
 NVIC_Init(&NVIC_InitStructure);     
}

//72M timer2
//ÖжÏʱ¼ä£º£¨720*10£©/72000000=0.1Ms=10K
void Timer2_config() //ucosiiʱÖÓ
 {
TIM_TimeBaseInitTypeDef  TIM_TimeBaseStructure;

TIM_TimeBaseStructure.TIM_Prescaler = 360-1; //36M/360=100K HZ
TIM_TimeBaseStructure.TIM_CounterMode = TIM_CounterMode_Up;  //ÏòÉϼÆÊý
TIM_TimeBaseStructure.TIM_Period = 10;       // ;   //×°ÔØֵѡÔñ 10K
TIM_TimeBaseStructure.TIM_ClockDivision = 0;
//TIM_TimeBaseStructure.TIM_RepetitionCounter = 4;
TIM_TimeBaseInit(TIM2, &TIM_TimeBaseStructure);
 
  TIM_ITConfig(TIM2,TIM_IT_Update|TIM_IT_Trigger,ENABLE);
  TIM_Cmd(TIM2, ENABLE);
 }

void TIM2_IRQHandler(void)
{

if (TIM_GetITStatus(TIM2, TIM_IT_Update) != RESET) //¼ì²éÖ¸¶¨µÄTIMÖжϷ¢ÉúÓë·ñ:TIM ÖжÏÔ´
 {
 
   if(Ledflg==0)
  {
    GPIO_SetBits(GPIOC, GPIO_Pin_6);
   GPIO_SetBits(GPIOC, GPIO_Pin_7);
    Ledflg=1;
  }
  else
  {
  GPIO_ResetBits(GPIOC, GPIO_Pin_6);
   GPIO_ResetBits(GPIOC, GPIO_Pin_7);
   Ledflg=0;
  }
  Ledcnt=0;

 }
TIM_ClearITPendingBit(TIM2, TIM_IT_Update  );  //Çå³ýTIMxµÄÖжϴý´¦Àíλ:TIM ÖжÏÔ´
                       
}