STM32 TIM定时器输出比较

#include "stm32f10x_lib.h"











TIM_TimeBaseInitTypeDef  TIM_TimeBaseStructure;

TIM_OCInitTypeDef  TIM_OCInitStructure;

vu16 CCR1_Val = 32768;

vu16 CCR2_Val = 16384;

vu16 CCR3_Val = 8192;

vu16 CCR4_Val = 4096;

ErrorStatus HSEStartUpStatus;





void RCC_Configuration(void);

void GPIO_Configuration(void);

void NVIC_Configuration(void);

   





int main(void)

{

#ifdef DEBUG

  debug();

#endif



 

  RCC_Configuration();



 

  NVIC_Configuration();

 

 

  GPIO_Configuration();



 



 

  TIM_TimeBaseStructure.TIM_Period = 65535;   //这里必须是65535

     

  TIM_TimeBaseStructure.TIM_Prescaler = 2;      

  TIM_TimeBaseStructure.TIM_ClockDivision = 0;   

  TIM_TimeBaseStructure.TIM_CounterMode = TIM_CounterMode_Up;

 

  TIM_TimeBaseInit(TIM2, &TIM_TimeBaseStructure);



 

  TIM_OCInitStructure.TIM_OCMode = TIM_OCMode_Toggle;  //管脚输出模式：翻转(TIM输出比较触发模式)

   

  TIM_OCInitStructure.TIM_Channel = TIM_Channel_1;         

  TIM_OCInitStructure.TIM_Pulse = CCR1_Val;   //翻转周期



  TIM_OCInitStructure.TIM_OCPolarity = TIM_OCPolarity_Low;//TIM输出比较极性低



  TIM_OCInit(TIM2, &TIM_OCInitStructure);



  TIM_OC1PreloadConfig(TIM2, TIM_OCPreload_Disable);//失能TIMx在CCR1上的预装载寄存器



 

  TIM_OCInitStructure.TIM_Channel = TIM_Channel_2;         

  TIM_OCInitStructure.TIM_Pulse = CCR2_Val; 

 

  TIM_OCInit(TIM2, &TIM_OCInitStructure);



  TIM_OC2PreloadConfig(TIM2, TIM_OCPreload_Disable);



 

  TIM_OCInitStructure.TIM_Channel = TIM_Channel_3;         

  TIM_OCInitStructure.TIM_Pulse = CCR3_Val; 

 

  TIM_OCInit(TIM2, &TIM_OCInitStructure);



  TIM_OC3PreloadConfig(TIM2, TIM_OCPreload_Disable);



 

  TIM_OCInitStructure.TIM_Channel = TIM_Channel_4;         

  TIM_OCInitStructure.TIM_Pulse = CCR4_Val; 

 

  TIM_OCInit(TIM2, &TIM_OCInitStructure);



  TIM_OC4PreloadConfig(TIM2, TIM_OCPreload_Disable);

 

 

  TIM_Cmd(TIM2, ENABLE);



 

  TIM_ITConfig(TIM2, TIM_IT_CC1 | TIM_IT_CC2 | TIM_IT_CC3 | TIM_IT_CC4, ENABLE);



  while (1)

  {

  } 

}





void RCC_Configuration(void)

{  

 

  RCC_DeInit();



 

  RCC_HSEConfig(RCC_HSE_ON);



 

  HSEStartUpStatus = RCC_WaitForHSEStartUp();



  if(HSEStartUpStatus == SUCCESS)

  {

   

    FLASH_PrefetchBufferCmd(FLASH_PrefetchBuffer_Enable);



   

    FLASH_SetLatency(FLASH_Latency_2);

 

   

    RCC_HCLKConfig(RCC_SYSCLK_Div1);

 

   

    RCC_PCLK2Config(RCC_HCLK_Div1);



   

    RCC_PCLK1Config(RCC_HCLK_Div4);



   

    RCC_PLLConfig(RCC_PLLSource_HSE_Div1, RCC_PLLMul_9);



   

    RCC_PLLCmd(ENABLE);



   

    while(RCC_GetFlagStatus(RCC_FLAG_PLLRDY) == RESET)

    {

    }



   

    RCC_SYSCLKConfig(RCC_SYSCLKSource_PLLCLK);



   

    while(RCC_GetSYSCLKSource() != 0x08)

    {

    }

  }



 

  RCC_APB1PeriphClockCmd(RCC_APB1Periph_TIM2, ENABLE);



 

  RCC_APB2PeriphClockCmd(RCC_APB2Periph_GPIOA, ENABLE);

}





void GPIO_Configuration(void)

{

  GPIO_InitTypeDef GPIO_InitStructure;



 

  GPIO_InitStructure.GPIO_Pin = GPIO_Pin_0 | GPIO_Pin_1 | GPIO_Pin_2 | GPIO_Pin_3;

  GPIO_InitStructure.GPIO_Mode = GPIO_Mode_AF_PP;

  GPIO_InitStructure.GPIO_Speed = GPIO_Speed_50MHz;



  GPIO_Init(GPIOA, &GPIO_InitStructure);

}





void NVIC_Configuration(void)

{

  NVIC_InitTypeDef NVIC_InitStructure;

  

#ifdef  VECT_TAB_RAM 

 

  NVIC_SetVectorTable(NVIC_VectTab_RAM, 0x0);

#else 

 

  NVIC_SetVectorTable(NVIC_VectTab_FLASH, 0x0);  

#endif

 

 

  NVIC_InitStructure.NVIC_IRQChannel = TIM2_IRQChannel;

  NVIC_InitStructure.NVIC_IRQChannelPreemptionPriority = 0;

  NVIC_InitStructure.NVIC_IRQChannelSubPriority = 0; 

  NVIC_InitStructure.NVIC_IRQChannelCmd = ENABLE;

  NVIC_Init(&NVIC_InitStructure);

}



#ifdef  DEBUG



void assert_failed(u8* file, u32 line)

{

 



  while (1)

  {

  } 

}

#endif

中断服务：







void TIM2_IRQHandler(void)

{

 

  if (TIM_GetITStatus(TIM2, TIM_IT_CC1) != RESET)//检查指定的TIM中断发生与否

  {

    TIM_ClearITPendingBit(TIM2, TIM_IT_CC1 );//清除TIMx的中断待处理位

 capture = TIM_GetCapture1(TIM2);

 TIM_SetCompare1(TIM2, capture + CCR1_Val );//设置TIMx自动重装载寄存器值

        //将TIM2_CC1的值增加CCR1_Val，使得下一个TIM事件也需要CCR1_Val个脉冲，



  }

 

 

  if (TIM_GetITStatus(TIM2, TIM_IT_CC2) != RESET)

  {

     TIM_ClearITPendingBit(TIM2, TIM_IT_CC2);

 capture = TIM_GetCapture2(TIM2);

    TIM_SetCompare2(TIM2, capture + CCR2_Val);

  } 



 

  if (TIM_GetITStatus(TIM2, TIM_IT_CC3) != RESET)

  {

    TIM_ClearITPendingBit(TIM2, TIM_IT_CC3);

 capture = TIM_GetCapture3(TIM2);

    TIM_SetCompare3(TIM2, capture + CCR3_Val);

  }



 

  if (TIM_GetITStatus(TIM2, TIM_IT_CC4) != RESET)

  {

    TIM_ClearITPendingBit(TIM2, TIM_IT_CC4);

 capture = TIM_GetCapture4(TIM2);

    TIM_SetCompare4(TIM2, capture + CCR4_Val);

  }  

}