计算两路方波信号相位差，帮忙看下程序哪里的问题

爱扣篮的KD · 发表于 2021-12-9 21:43:20

感觉主要是 TIM3_IRQHandler中断函数里面逻辑的问题，得到TIM3CH1_CAPTURE_VAL、TIM3CH2_CAPTURE_VAL的值一直为0
本人几个问题如下请大佬解答：
1. 32中的更新中断是什么意思？更新中断是定时器溢出产生的中断吗
2. 如果不使能更新中断会怎么样？定时器还能正常计算吗？溢出后还能重新装载值吗
3.原子定时器中断里面的
if((TIM5CH1_CAPTURE_STA&0X80)==0)//»1Î′3é1|2¶»ñ
{
if (TIM_GetITStatus(TIM5, TIM_IT_Update) != RESET)

{
if(TIM5CH1_CAPTURE_STA&0X40)//òÑ¾-2¶»ñμ½¸ßμçÆ½áË
{
if((TIM5CH1_CAPTURE_STA&0X3F)==0X3F)//¸ßμçÆ½ì«3¤áË
{
TIM5CH1_CAPTURE_STA|=0X80;//±ê¼Ç3é1|2¶»ñáËò»′Î
TIM5CH1_CAPTURE_VAL=0XFFFF;
}else TIM5CH1_CAPTURE_STA++;
}
}
这段代码是什么意思？一定要有吗？

下面附上我自己写的timer.c，请大佬看下！
#include "timer.h"
#include "led.h"
#include "usart.h"

TIM_ICInitTypeDef  TIM3_ICInitStructure;

void TIM3_Cap_Init(u16 arr,u16 psc)
{
GPIO_InitTypeDef GPIO_InitStructure;
TIM_TimeBaseInitTypeDef  TIM_TimeBaseStructure;
  NVIC_InitTypeDef NVIC_InitStructure;

RCC_APB1PeriphClockCmd(RCC_APB1Periph_TIM3, ENABLE); //ê1ÄüTIM3ê±Öó
RCC_APB2PeriphClockCmd(RCC_APB2Periph_GPIOA, ENABLE);  //ê1ÄüGPIOAê±Öó

GPIO_InitStructure.GPIO_Pin  = GPIO_Pin_6|GPIO_Pin_7;
GPIO_InitStructure.GPIO_Mode = GPIO_Mode_IPD; //PA6 PA7 ÏÂà-êäèë
GPIO_Init(GPIOA, &GPIO_InitStructure);       //PA
  GPIO_InitStructure.GPIO_Speed = GPIO_Speed_50MHz;
// GPIO_ResetBits(GPIOA,GPIO_Pin_6|GPIO_Pin_7); //PA6 PA7 ÏÂà-

//3õê¼»ˉ¶¨ê±Æ÷2 TIM2
TIM_TimeBaseStructure.TIM_Period = arr; //éè¶¨¼ÆêyÆ÷×Ô¶ˉÖØ×°Öμ
TIM_TimeBaseStructure.TIM_Prescaler =psc; //Ô¤·ÖÆμÆ÷
TIM_TimeBaseStructure.TIM_ClockDivision = TIM_CKD_DIV1; //éèÖÃê±Öó·Ö¸î:TDTS = Tck_tim
TIM_TimeBaseStructure.TIM_CounterMode = TIM_CounterMode_Up;  //TIMÏòéÏ¼ÆêyÄ￡ê½
TIM_TimeBaseInit(TIM3, &TIM_TimeBaseStructure); //¸ù¾YTIM_TimeBaseInitStructÖDÖ¸¶¨μÄ2Îêy3õê¼»ˉTIMxμÄê±¼ä»ùêyμ￥Î»

//3õê¼»ˉTIM3êäèë2¶»ñ2Îêy
TIM3_ICInitStructure.TIM_Channel = TIM_Channel_1; //CC1S=01 Ñ¡Ôñêäèë¶Ë IC1ó3éäμ½TI1éÏ
  TIM3_ICInitStructure.TIM_ICPolarity = TIM_ICPolarity_Rising; //éÏéyÑØ2¶»ñ
  TIM3_ICInitStructure.TIM_ICSelection = TIM_ICSelection_DirectTI; //ó3éäμ½TI1éÏ
  TIM3_ICInitStructure.TIM_ICPrescaler = TIM_ICPSC_DIV1;    //ÅäÖÃêäèë·ÖÆμ,2»·ÖÆμ
  TIM3_ICInitStructure.TIM_ICFilter = 0x00;//IC1F=0000 ÅäÖÃêäèëÂË2¨Æ÷ 2»ÂË2¨
  TIM_ICInit(TIM3, &TIM3_ICInitStructure);

TIM3_ICInitStructure.TIM_Channel = TIM_Channel_2; //CC1S=01 Ñ¡Ôñêäèë¶Ë IC1ó3éäμ½TI1éÏ
  TIM3_ICInitStructure.TIM_ICPolarity = TIM_ICPolarity_Rising; //éÏéyÑØ2¶»ñ
  TIM3_ICInitStructure.TIM_ICSelection = TIM_ICSelection_DirectTI; //ó3éäμ½TI1éÏ
  TIM3_ICInitStructure.TIM_ICPrescaler = TIM_ICPSC_DIV1;    //ÅäÖÃêäèë·ÖÆμ,2»·ÖÆμ
  TIM3_ICInitStructure.TIM_ICFilter = 0x00;//IC1F=0000 ÅäÖÃêäèëÂË2¨Æ÷ 2»ÂË2¨
  TIM_ICInit(TIM3, &TIM3_ICInitStructure);
//ÖD¶Ï·Ö×é3õê¼»ˉ
NVIC_InitStructure.NVIC_IRQChannel = TIM3_IRQn;  //TIM3ÖD¶Ï
NVIC_InitStructure.NVIC_IRQChannelPreemptionPriority = 2;  //ÏèÕ¼óÅÏè¼¶2¼¶
NVIC_InitStructure.NVIC_IRQChannelSubPriority = 0;  //′óóÅÏè¼¶0¼¶
NVIC_InitStructure.NVIC_IRQChannelCmd = ENABLE; //IRQí¨μà±»ê1Äü
NVIC_Init(&NVIC_InitStructure);  //¸ù¾YNVIC_InitStructÖDÖ¸¶¨μÄ2Îêy3õê¼»ˉíaéèNVIC¼Ä′æÆ÷

TIM_ITConfig(TIM3,TIM_IT_Update|TIM_IT_CC1|TIM_IT_CC2,ENABLE);//ÔêDí¸üDÂÖD¶Ï ,ÔêDíCC1IE2¶»ñÖD¶Ï

  TIM_Cmd(TIM3,ENABLE ); //ê1Äü¶¨ê±Æ÷5
  printf("TIM3_Cap_Init is success!\r\n");

}
u8  TIM3CH1_CAPTURE_STA=0; //êäèë2¶»ñ×′ì¬
u16 TIM3CH1_CAPTURE_VAL; //êäèë2¶»ñÖμ

u8  TIM3CH2_CAPTURE_STA=0; //êäèë2¶»ñ×′ì¬
u16 TIM3CH2_CAPTURE_VAL; //êäèë2¶»ñÖμ

u16 TIM3_CAPTURE_VAL;

void TIM3_IRQHandler(void)
{
if (TIM_GetITStatus(TIM3, TIM_IT_Update) != RESET)
{
   printf(" success  !\r\n");
TIM_ClearITPendingBit(TIM5, TIM_IT_Update);
}
if (TIM_GetITStatus(TIM3, TIM_IT_CC1) != RESET)//2¶»ñ1·￠éú2¶»ñêÂ¼t
         {
//    printf("timer3ch1 is success capture !\r\n");
               TIM_ClearITPendingBit(TIM3, TIM_IT_CC1);
   TIM3CH1_CAPTURE_VAL=TIM_GetCapture1(TIM3);
   printf("ch1:%d\r\n",TIM3CH1_CAPTURE_VAL);
//    TIM_ITConfig(TIM3,TIM_IT_CC2,ENABLE);    //2¶×½μ½ch1ÖD¶Ïoó￡¬′ò¿ach22¶»ñÖD¶Ï
//    TIM_ITConfig(TIM3,TIM_IT_CC1,DISABLE); //1Ø±Õch12¶»ñÖD¶Ï

         }
if (TIM_GetITStatus(TIM3, TIM_IT_CC2) != RESET)//2¶»ñ2·￠éú2¶»ñêÂ¼t
         {
//    printf("timer3ch2 is success capture !\r\n");
   TIM_ClearITPendingBit(TIM3, TIM_IT_CC2);    //Çå3yÖD¶Ï±êÖ¾Î»
   TIM3CH2_CAPTURE_VAL=TIM_GetCapture2(TIM3);
   printf("ch2:%d\r\n",TIM3CH2_CAPTURE_VAL);
   if(TIM3CH2_CAPTURE_VAL>TIM3CH1_CAPTURE_VAL)
   {
                        TIM3_CAPTURE_VAL=TIM3CH2_CAPTURE_VAL-TIM3CH1_CAPTURE_VAL;
   }
   else
{
      TIM3_CAPTURE_VAL=0xffff-TIM3CH1_CAPTURE_VAL+TIM3CH2_CAPTURE_VAL;
}
   printf("%d\r\n",TIM3_CAPTURE_VAL);
//    TIM_ITConfig(TIM3,TIM_IT_CC1,ENABLE);    //2¶×½μ½ch1ÖD¶Ïoó￡¬′ò¿ach22¶»ñÖD¶Ï
//                TIM_ITConfig(TIM3,TIM_IT_CC2,DISABLE); //1Ø±Õch22¶»ñÖD¶Ï
//                TIM3->CNT=0;          //¼ÆêyÆ÷Çå¿Õ

         }
}

float phase_cal(void)
{
float phase;
phase=360.0*(TIM3_CAPTURE_VAL*1.0)/0xfffff;
return phase;
}