STM32F103RC怎么样同时捕获16路脉冲输入?

raphael84

STM32F103RC怎么样同时捕获16路脉冲输入? [复制链接]

STM32F103RC怎么样同时捕获16路脉冲输入? TI3FP3 /TI4FP4 怎么样定义?要算出每个脉冲的宽度

lranseti

用TIM1,TIM2,TIM3,TIM4 的TIM_Channel_1、TIM_Channel_2 共8路我会，但TIM_Channel_3、TIM_Channel_4的　TIM_SelectInputTrigger 的触发方式不知道用哪个呀?
TIM_SelectInputTrigger(TIM1, TIM_TS_TI1FP1);  
TIM_SelectInputTrigger(TIM1, TIM_TS_TI2FP2);
TIM_SelectInputTrigger(TIM1, TIM_TS_TI3FP3);
TIM_SelectInputTrigger(TIM1, TIM_TS_TI4FP4);


  

cooler1981

//Init Timer1 CC3
TIM_ICInitStructure.TIM_Channel = TIM_Channel_3;
TIM_ICInitStructure.TIM_ICPolarity = TIM_ICPolarity_Rising;
TIM_ICInitStructure.TIM_ICSelection = TIM_ICSelection_DirectTI;
TIM_ICInitStructure.TIM_ICPrescaler = TIM_ICPSC_DIV1;
TIM_ICInitStructure.TIM_ICFilter = 0x0;

TIM_ICInit(TIM1, &TIM_ICInitStructure);


//Init Timer1 CC4

TIM_ICInitStructure.TIM_Channel = TIM_Channel_4;

TIM_ICInitStructure.TIM_ICPolarity = TIM_ICPolarity_Rising;

TIM_ICInitStructure.TIM_ICSelection = TIM_ICSelection_DirectTI;

TIM_ICInitStructure.TIM_ICPrescaler = TIM_ICPSC_DIV1;

TIM_ICInitStructure.TIM_ICFilter = 0x0;

TIM_ICInit(TIM1, &TIM_ICInitStructure);

TIM_SelectInputTrigger(TIM1, TIM_TS_TI3FP3);
是这样吗?

lzjcjwl

                                 以前有帖子讨论过这个问题。

flyactel

                                 那我现在要同时捕获16路脉冲(高低电平方波)输入要怎么样处理?

jianning

                                 频率低可以用捕获+中断方式，频率高就没有办法了。

gsypuma

                                 能不能同时捕获16路脉冲(高低电平方波)？

lu00788

                                 频率很能低，不超过50Hz

moto_jfx

用16路外部中断来实现吗？我怕外部中断精度不够呀

dujin

                                 频率低可以用捕获+中断方式要用哪些中断?

nanaless44

配置定时器为自由计数，即从0x0000计数到0xFFFF，然后重复从0x0000开始。

对于每个通道都是先输入捕获上升沿，发生捕获时产生中断，中断中读出捕获数值，记作IC0，再把捕获边沿改为下降沿，再次发生捕获中断时再读出捕获数值，记作IC1，最后IC0与IC1之差就是脉冲的宽度；在处理下降沿再把捕获边沿改为上升沿，即可进入下一次捕获计算。

2次IC0之差就是外部信号的频率。

410943844

                                 每个定时器最多有4个输入捕获通道。

sjh008

是否每个定时器要启用４个中断? 
如:
TIM_ITConfig(TIM1, TIM_IT_CC1, ENABLE);
TIM_ITConfig(TIM1, TIM_IT_CC2, ENABLE);
TIM_ITConfig(TIM1, TIM_IT_CC3, ENABLE);
TIM_ITConfig(TIM1, TIM_IT_CC4, ENABLE);

tmrobin630

                                  

haohaohao123456

TIM_SelectInputTrigger(TIM1, TIM_TS_TI1FP1); 对于此函数的第二个参数用什么呢? TIM_TS_TI1FP1 还是TIM_TS_TI2FP2

qiuliang012

不清楚再来问。

---

其实，你要求的功能用不到这个函数。

xifen888207

                                  

catastrophe

                                 谢了.香主

you168you

/*******************************************************************************
* Function Name  : NVIC_Config
*
* Description    : None
*
* Arguments      : None
*
* Returns        : None
*******************************************************************************/
static void NVIC_Config(void)
{
    NVIC_InitTypeDef NVIC_InitStructure;

    /* Set the Vector Table base location at 0x08000000 */ 
    NVIC_SetVectorTable(NVIC_VectTab_FLASH, 0x00);   

    /* Configure one bit for preemption priority */
    NVIC_PriorityGroupConfig(NVIC_PriorityGroup_3);



    /* TIM1 IRQ configuration Priority : 1 -----------------------------------*/
    NVIC_InitStructure.NVIC_IRQChannel = TIM1_IRQChannel;
    NVIC_InitStructure.NVIC_IRQChannelPreemptionPriority = 1;
    NVIC_InitStructure.NVIC_IRQChannelSubPriority = 0;
    NVIC_InitStructure.NVIC_IRQChannelCmd = ENABLE;
    NVIC_Init(&NVIC_InitStructure);    

    /* TIM2 IRQ configuration Priority : 1 -----------------------------------*/
    NVIC_InitStructure.NVIC_IRQChannel = TIM2_IRQChannel;
    NVIC_InitStructure.NVIC_IRQChannelPreemptionPriority = 1;
    NVIC_InitStructure.NVIC_IRQChannelSubPriority = 0;
    NVIC_InitStructure.NVIC_IRQChannelCmd = ENABLE;
    NVIC_Init(&NVIC_InitStructure);    

    /* TIM3 IRQ configuration Priority : 1 -----------------------------------*/
    NVIC_InitStructure.NVIC_IRQChannel = TIM3_IRQChannel;
    NVIC_InitStructure.NVIC_IRQChannelPreemptionPriority = 1;
    NVIC_InitStructure.NVIC_IRQChannelSubPriority = 0;
    NVIC_InitStructure.NVIC_IRQChannelCmd = ENABLE;
    NVIC_Init(&NVIC_InitStructure);    

    /* TIM4 IRQ configuration Priority : 1 -----------------------------------*/
    NVIC_InitStructure.NVIC_IRQChannel = TIM4_IRQChannel;
    NVIC_InitStructure.NVIC_IRQChannelPreemptionPriority = 1;
    NVIC_InitStructure.NVIC_IRQChannelSubPriority = 0;
    NVIC_InitStructure.NVIC_IRQChannelCmd = ENABLE;
    NVIC_Init(&NVIC_InitStructure);    

        
}

/*******************************************************************************
* Function Name  : TIM_16CaptureInitial
*
* Description    : None
*
* Arguments      : None
*
* Returns        : None
*******************************************************************************/
static void TIM_16CaptureInitial(void)
{
  TIM_TimeBaseInitTypeDef  TIM_TimeBaseStructure;
  TIM_ICInitTypeDef  TIM_ICInitStructure;

  /* Timer Base configuration */
  TIM_TimeBaseStructure.TIM_Period = 65535;          
  TIM_TimeBaseStructure.TIM_Prescaler = 7199;       
  TIM_TimeBaseStructure.TIM_ClockDivision = 0x00;    
  TIM_TimeBaseStructure.TIM_CounterMode = TIM_CounterMode_Up; 
  TIM_TimeBaseInit(TIM1, &TIM_TimeBaseStructure);  
  TIM_TimeBaseInit(TIM2, &TIM_TimeBaseStructure);  
  TIM_TimeBaseInit(TIM3, &TIM_TimeBaseStructure);  
  TIM_TimeBaseInit(TIM4, &TIM_TimeBaseStructure);  

  // TIMx Input Capture Configuration 
  //TIM_ICInitStructure.TIM_ICMode = TIM_ICMode_ICAP;
  TIM_ICInitStructure.TIM_Channel = TIM_Channel_1;
  TIM_ICInitStructure.TIM_ICPolarity = TIM_ICPolarity_Rising;
  TIM_ICInitStructure.TIM_ICSelection = TIM_ICSelection_DirectTI;
  TIM_ICInitStructure.TIM_ICPrescaler = TIM_ICPSC_DIV1;
  TIM_ICInitStructure.TIM_ICFilter = 0;

  TIM_ICInit(TIM1, &TIM_ICInitStructure);
  TIM_ICInit(TIM2, &TIM_ICInitStructure);
  TIM_ICInit(TIM3, &TIM_ICInitStructure);
  TIM_ICInit(TIM4, &TIM_ICInitStructure);

  TIM_ICInitStructure.TIM_Channel = TIM_Channel_2;
  TIM_ICInit(TIM1, &TIM_ICInitStructure);
  TIM_ICInit(TIM2, &TIM_ICInitStructure);
  TIM_ICInit(TIM3, &TIM_ICInitStructure);
  TIM_ICInit(TIM4, &TIM_ICInitStructure);
  
  TIM_ICInitStructure.TIM_Channel = TIM_Channel_3;
  TIM_ICInit(TIM1, &TIM_ICInitStructure);
  TIM_ICInit(TIM2, &TIM_ICInitStructure);
  TIM_ICInit(TIM3, &TIM_ICInitStructure);
  TIM_ICInit(TIM4, &TIM_ICInitStructure);

  TIM_ICInitStructure.TIM_Channel = TIM_Channel_4;
  TIM_ICInit(TIM1, &TIM_ICInitStructure);
  TIM_ICInit(TIM2, &TIM_ICInitStructure);
  TIM_ICInit(TIM3, &TIM_ICInitStructure);
  TIM_ICInit(TIM4, &TIM_ICInitStructure);
  
  //Enable TIMx Capture Compare x Interrupt source
  TIM_ITConfig(TIM1,TIM_IT_CC1 | TIM_IT_CC2 | TIM_IT_CC3 | TIM_IT_CC4,ENABLE);
  TIM_ITConfig(TIM2,TIM_IT_CC1 | TIM_IT_CC2 | TIM_IT_CC3 | TIM_IT_CC4,ENABLE);
  TIM_ITConfig(TIM3,TIM_IT_CC1 | TIM_IT_CC2 | TIM_IT_CC3 | TIM_IT_CC4,ENABLE);
  TIM_ITConfig(TIM4,TIM_IT_CC1 | TIM_IT_CC2 | TIM_IT_CC3 | TIM_IT_CC4,ENABLE);

  
  /* Enable timer counter */
  TIM_Cmd(TIM1,ENABLE);
  TIM_Cmd(TIM2,ENABLE);
  TIM_Cmd(TIM3,ENABLE);
  TIM_Cmd(TIM4,ENABLE);

}

yezhengmin

脉冲长度 1ms -- 6000ms
CPU(72MHz)