stm32 timer 2 outputs 10KHZ waveform

Continuing from the previous article

/*! @function
************************************************** **********************************

 

º¯ÊýÃû :RCC_Configuration 

¹¦ÄÜ :ʱÖÓÅäÖà 

--- -------------------------------------------------- ----------------------------- 

²ÎÊý :ÎÞ 

·µ»ØÖµ :ÎÞ 

------------ -------------------------------------------------- ------------------- 

ʹÓõÄÈ«¾Ö±äÁ¿£ºÎÞ 

---------------------- -------------------------------------------------- --------- 

×÷Õß:            

ʱ¼ä: 2012/10/17 

************************** ****************************************************** *****/
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
********************************************************************************

º¯ÊýÃû   :NVIC_Configuration

¹¦ÄÜ     :ÖжϿØÖÆÆ÷ÅäÖÃ

----------------------------------------------------------------------------------

²ÎÊý     :ÎÞ

·µ»ØÖµ   :ÎÞ

---------------------------------------------------------------------------------

ʹÓõÄÈ«¾Ö±äÁ¿£ºÎÞ

----------------------------------------------------------------------------------

×÷Õß     :           

ʱ¼ä     : 2012/10/17

*******************************************************************************/
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´ 
                        
}