STM32

关于输入捕获实验，对于输入的脉冲进行计数，参考了输入捕获实验，进行修改，不知道对不对

2019-10-16 08:08发布

站内问答 / STM32/STM8
3237 3 1298
void CoderInit(void)
{
  TIM_TimeBaseInitTypeDef  TIM_TimeBaseStructure;
  TIM_ICInitTypeDef TIM3_ICInitStructure;


  GPIO_InitTypeDef GPIO_InitStructure;
// NVIC_InitTypeDef NVIC_InitStructure;

  /* 定时器时钟使能 */
  RCC_APB1PeriphClockCmd(RCC_APB1Periph_TIM3, ENABLE);
  /* 管脚时钟使能 */
  RCC_APB2PeriphClockCmd(RCC_APB2Periph_GPIOB|RCC_APB2Periph_GPIOC, ENABLE);

  GPIO_StructInit(&GPIO_InitStructure);

  GPIO_InitStructure.GPIO_Pin = GPIO_Pin_0 | GPIO_Pin_1;
  GPIO_InitStructure.GPIO_Mode = GPIO_Mode_IN_FLOATING;
  GPIO_Init(GPIOB, &GPIO_InitStructure);
       
        GPIO_StructInit(&GPIO_InitStructure);

  GPIO_InitStructure.GPIO_Pin = GPIO_Pin_4 | GPIO_Pin_5;
  GPIO_InitStructure.GPIO_Mode = GPIO_Mode_IN_FLOATING;
  GPIO_Init(GPIOC, &GPIO_InitStructure);





  TIM_TimeBaseStructure.TIM_Prescaler = 0;  // No prescaling
  TIM_TimeBaseStructure.TIM_Period = 1000;  
  TIM_TimeBaseStructure.TIM_ClockDivision = TIM_CKD_DIV1;
  TIM_TimeBaseStructure.TIM_CounterMode = TIM_CounterMode_Up;   
  TIM_TimeBaseInit(TIM3, &TIM_TimeBaseStructure);

        //初始化TIM3输入捕获参数
          TIM3_ICInitStructure.TIM_Channel = TIM_Channel_3; //CC1S=01         选择输入端 IC1映射到TI1上
          TIM3_ICInitStructure.TIM_ICPolarity = TIM_ICPolarity_BothEdge;        //双边沿沿捕获
          TIM3_ICInitStructure.TIM_ICSelection = TIM_ICSelection_DirectTI; //映射到TI1上
          TIM3_ICInitStructure.TIM_ICPrescaler = TIM_ICPSC_DIV1;         //配置输入分频,不分频
          TIM3_ICInitStructure.TIM_ICFilter = 0x00;//IC1F=0000 配置输入滤波器 不滤波
          TIM_ICInit(TIM3, &TIM3_ICInitStructure);
               
                TIM3_ICInitStructure.TIM_Channel = TIM_Channel_4; //CC1S=01         选择输入端 IC1映射到TI1上
          TIM3_ICInitStructure.TIM_ICPolarity = TIM_ICPolarity_BothEdge;        //双边沿沿捕获
          TIM3_ICInitStructure.TIM_ICSelection = TIM_ICSelection_DirectTI; //映射到TI1上
          TIM3_ICInitStructure.TIM_ICPrescaler = TIM_ICPSC_DIV1;         //配置输入分频,不分频
          TIM3_ICInitStructure.TIM_ICFilter = 0x00;//IC1F=0000 配置输入滤波器 不滤波
          TIM_ICInit(TIM3, &TIM3_ICInitStructure);
               
                TIM3->CNT = 0;

          TIM_Cmd(TIM3, ENABLE);   //启动TIM4定时器

}

还有读出计数器的值就是调用TIM_GetCounter(TIM3)这个函数么？？


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3条回答
正点原子
1楼-- · 2019-10-16 11:32
 精彩回答 2  元偷偷看……
beibei
2楼-- · 2019-10-16 13:53
正点原子 发表于 2016-11-25 23:12
参考我的代码：http://www.openedv.com/forum.php?mod=viewthread&tid=33247&highlight=%C2%F6%B3%E5%BC%C6 ...

原子哥，想问下可否有库函数版本的？？或者可否告诉我哪一个函数是选定外部时钟模式1的函数？？？
void TIM_DeInit(TIM_TypeDef* TIMx);
void TIM_TimeBaseInit(TIM_TypeDef* TIMx, TIM_TimeBaseInitTypeDef* TIM_TimeBaseInitStruct);
void TIM_OC1Init(TIM_TypeDef* TIMx, TIM_OCInitTypeDef* TIM_OCInitStruct);
void TIM_OC2Init(TIM_TypeDef* TIMx, TIM_OCInitTypeDef* TIM_OCInitStruct);
void TIM_OC3Init(TIM_TypeDef* TIMx, TIM_OCInitTypeDef* TIM_OCInitStruct);
void TIM_OC4Init(TIM_TypeDef* TIMx, TIM_OCInitTypeDef* TIM_OCInitStruct);
void TIM_ICInit(TIM_TypeDef* TIMx, TIM_ICInitTypeDef* TIM_ICInitStruct);
void TIM_PWMIConfig(TIM_TypeDef* TIMx, TIM_ICInitTypeDef* TIM_ICInitStruct);
void TIM_BDTRConfig(TIM_TypeDef* TIMx, TIM_BDTRInitTypeDef *TIM_BDTRInitStruct);
void TIM_TimeBaseStructInit(TIM_TimeBaseInitTypeDef* TIM_TimeBaseInitStruct);
void TIM_OCStructInit(TIM_OCInitTypeDef* TIM_OCInitStruct);
void TIM_ICStructInit(TIM_ICInitTypeDef* TIM_ICInitStruct);
void TIM_BDTRStructInit(TIM_BDTRInitTypeDef* TIM_BDTRInitStruct);
void TIM_Cmd(TIM_TypeDef* TIMx, FunctionalState NewState);
void TIM_CtrlPWMOutputs(TIM_TypeDef* TIMx, FunctionalState NewState);
void TIM_ITConfig(TIM_TypeDef* TIMx, uint16_t TIM_IT, FunctionalState NewState);
void TIM_GenerateEvent(TIM_TypeDef* TIMx, uint16_t TIM_EventSource);
void TIM_DMAConfig(TIM_TypeDef* TIMx, uint16_t TIM_DMABase, uint16_t TIM_DMABurstLength);
void TIM_DMACmd(TIM_TypeDef* TIMx, uint16_t TIM_DMASource, FunctionalState NewState);
void TIM_InternalClockConfig(TIM_TypeDef* TIMx);
void TIM_ITRxExternalClockConfig(TIM_TypeDef* TIMx, uint16_t TIM_InputTriggerSource);
void TIM_TIxExternalClockConfig(TIM_TypeDef* TIMx, uint16_t TIM_TIxExternalCLKSource,
                                uint16_t TIM_ICPolarity, uint16_t ICFilter);
void TIM_ETRClockMode1Config(TIM_TypeDef* TIMx, uint16_t TIM_ExtTRGPrescaler, uint16_t TIM_ExtTRGPolarity,
                             uint16_t ExtTRGFilter);
void TIM_ETRClockMode2Config(TIM_TypeDef* TIMx, uint16_t TIM_ExtTRGPrescaler,
                             uint16_t TIM_ExtTRGPolarity, uint16_t ExtTRGFilter);
void TIM_ETRConfig(TIM_TypeDef* TIMx, uint16_t TIM_ExtTRGPrescaler, uint16_t TIM_ExtTRGPolarity,
                   uint16_t ExtTRGFilter);
void TIM_PrescalerConfig(TIM_TypeDef* TIMx, uint16_t Prescaler, uint16_t TIM_PSCReloadMode);
void TIM_CounterModeConfig(TIM_TypeDef* TIMx, uint16_t TIM_CounterMode);
void TIM_SelectInputTrigger(TIM_TypeDef* TIMx, uint16_t TIM_InputTriggerSource);
void TIM_EncoderInterfaceConfig(TIM_TypeDef* TIMx, uint16_t TIM_EncoderMode,
                                uint16_t TIM_IC1Polarity, uint16_t TIM_IC2Polarity);
void TIM_ForcedOC1Config(TIM_TypeDef* TIMx, uint16_t TIM_ForcedAction);
void TIM_ForcedOC2Config(TIM_TypeDef* TIMx, uint16_t TIM_ForcedAction);
void TIM_ForcedOC3Config(TIM_TypeDef* TIMx, uint16_t TIM_ForcedAction);
void TIM_ForcedOC4Config(TIM_TypeDef* TIMx, uint16_t TIM_ForcedAction);
void TIM_ARRPreloadConfig(TIM_TypeDef* TIMx, FunctionalState NewState);
void TIM_SelectCOM(TIM_TypeDef* TIMx, FunctionalState NewState);
void TIM_SelectCCDMA(TIM_TypeDef* TIMx, FunctionalState NewState);
void TIM_CCPreloadControl(TIM_TypeDef* TIMx, FunctionalState NewState);
void TIM_OC1PreloadConfig(TIM_TypeDef* TIMx, uint16_t TIM_OCPreload);
void TIM_OC2PreloadConfig(TIM_TypeDef* TIMx, uint16_t TIM_OCPreload);
void TIM_OC3PreloadConfig(TIM_TypeDef* TIMx, uint16_t TIM_OCPreload);
void TIM_OC4PreloadConfig(TIM_TypeDef* TIMx, uint16_t TIM_OCPreload);
void TIM_OC1FastConfig(TIM_TypeDef* TIMx, uint16_t TIM_OCFast);
void TIM_OC2FastConfig(TIM_TypeDef* TIMx, uint16_t TIM_OCFast);
void TIM_OC3FastConfig(TIM_TypeDef* TIMx, uint16_t TIM_OCFast);
void TIM_OC4FastConfig(TIM_TypeDef* TIMx, uint16_t TIM_OCFast);
void TIM_ClearOC1Ref(TIM_TypeDef* TIMx, uint16_t TIM_OCClear);
void TIM_ClearOC2Ref(TIM_TypeDef* TIMx, uint16_t TIM_OCClear);
void TIM_ClearOC3Ref(TIM_TypeDef* TIMx, uint16_t TIM_OCClear);
void TIM_ClearOC4Ref(TIM_TypeDef* TIMx, uint16_t TIM_OCClear);
void TIM_OC1PolarityConfig(TIM_TypeDef* TIMx, uint16_t TIM_OCPolarity);
void TIM_OC1NPolarityConfig(TIM_TypeDef* TIMx, uint16_t TIM_OCNPolarity);
void TIM_OC2PolarityConfig(TIM_TypeDef* TIMx, uint16_t TIM_OCPolarity);
void TIM_OC2NPolarityConfig(TIM_TypeDef* TIMx, uint16_t TIM_OCNPolarity);
void TIM_OC3PolarityConfig(TIM_TypeDef* TIMx, uint16_t TIM_OCPolarity);
void TIM_OC3NPolarityConfig(TIM_TypeDef* TIMx, uint16_t TIM_OCNPolarity);
void TIM_OC4PolarityConfig(TIM_TypeDef* TIMx, uint16_t TIM_OCPolarity);
void TIM_CCxCmd(TIM_TypeDef* TIMx, uint16_t TIM_Channel, uint16_t TIM_CCx);
void TIM_CCxNCmd(TIM_TypeDef* TIMx, uint16_t TIM_Channel, uint16_t TIM_CCxN);
void TIM_SelectOCxM(TIM_TypeDef* TIMx, uint16_t TIM_Channel, uint16_t TIM_OCMode);
void TIM_UpdateDisableConfig(TIM_TypeDef* TIMx, FunctionalState NewState);
void TIM_UpdateRequestConfig(TIM_TypeDef* TIMx, uint16_t TIM_UpdateSource);
void TIM_SelectHallSensor(TIM_TypeDef* TIMx, FunctionalState NewState);
void TIM_SelectOnePulseMode(TIM_TypeDef* TIMx, uint16_t TIM_OPMode);
void TIM_SelectOutputTrigger(TIM_TypeDef* TIMx, uint16_t TIM_TRGOSource);
void TIM_SelectSlaveMode(TIM_TypeDef* TIMx, uint16_t TIM_SlaveMode);
void TIM_SelectMasterSlaveMode(TIM_TypeDef* TIMx, uint16_t TIM_MasterSlaveMode);
void TIM_SetCounter(TIM_TypeDef* TIMx, uint16_t Counter);
void TIM_SetAutoreload(TIM_TypeDef* TIMx, uint16_t Autoreload);
void TIM_SetCompare1(TIM_TypeDef* TIMx, uint16_t Compare1);
void TIM_SetCompare2(TIM_TypeDef* TIMx, uint16_t Compare2);
void TIM_SetCompare3(TIM_TypeDef* TIMx, uint16_t Compare3);
void TIM_SetCompare4(TIM_TypeDef* TIMx, uint16_t Compare4);
void TIM_SetIC1Prescaler(TIM_TypeDef* TIMx, uint16_t TIM_ICPSC);
void TIM_SetIC2Prescaler(TIM_TypeDef* TIMx, uint16_t TIM_ICPSC);
void TIM_SetIC3Prescaler(TIM_TypeDef* TIMx, uint16_t TIM_ICPSC);
void TIM_SetIC4Prescaler(TIM_TypeDef* TIMx, uint16_t TIM_ICPSC);
void TIM_SetClockDivision(TIM_TypeDef* TIMx, uint16_t TIM_CKD);
uint16_t TIM_GetCapture1(TIM_TypeDef* TIMx);
uint16_t TIM_GetCapture2(TIM_TypeDef* TIMx);
uint16_t TIM_GetCapture3(TIM_TypeDef* TIMx);
uint16_t TIM_GetCapture4(TIM_TypeDef* TIMx);
uint16_t TIM_GetCounter(TIM_TypeDef* TIMx);
uint16_t TIM_GetPrescaler(TIM_TypeDef* TIMx);
FlagStatus TIM_GetFlagStatus(TIM_TypeDef* TIMx, uint16_t TIM_FLAG);
void TIM_ClearFlag(TIM_TypeDef* TIMx, uint16_t TIM_FLAG);
ITStatus TIM_GetITStatus(TIM_TypeDef* TIMx, uint16_t TIM_IT);
void TIM_ClearITPendingBit(TIM_TypeDef* TIMx, uint16_t TIM_IT);
beibei
3楼-- · 2019-10-16 18:14
正点原子 发表于 2016-11-25 23:12
参考我的代码：http://www.openedv.com/forum.php?mod=viewthread&tid=33247&highlight=%C2%F6%B3%E5%BC%C6 ...

我想设置PB0还（TIM—CH3）为输入捕获，但是我这样设置完成之后 还是PA7有反应，PB0还是没有反应？？
RCC->APB1ENR|=1<<1;      //TIM3 时钟使能  
RCC->APB2ENR|=1<<3;     //使能PORTB时钟   

GPIOB->CRL&=0XFFFFFFF0;     //PB0 清除之前设置   
GPIOB->CRL|=0X00000008;     //PB0 输入   
GPIOB->ODR|=1<<0;         //PB0 上拉

TIM3->ARR=20;      //设定计数器自动重装值   
TIM3->PSC=0;      //预分频器  

TIM3->CCMR2|=1<<0;     //CC2S=01  选择输入端 IC2映射到TI3上
TIM3->CCMR2|=0<<4;    //IC2F=0000 配置输入滤波器 不滤波

TIM3->CCER|=1<<9;      //CC1P=0   下降沿计数
TIM3->SMCR|=6<<4;   //触发选择:滤波后的定时器输入2(TI2FP2)
TIM3->SMCR|=7<<0;   //外部时钟模式1
TIM3->CR1|=1<<0;    //启动计数器，CEN=1

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