配置TIM1的PWM输入捕获，但程序卡死，求大神指点

凌曦月 · 发表于 2020-4-6 23:26:44

本帖最后由凌曦月于 2020-4-8 10:34 编辑

初学者，TIM3通道1PA6配置为比较输出，TIM1的通道1PA8配置为输入捕获，PA6通过跳线接到PA8，测量PA6的占空比和周期，然后通过串口显示，但程序卡死在void HardFault_Handler(void)；求大神指点
以下是代码：
#include "stm32f10x.h"
#include "bsp_TIM.h"
#include <stdio.h>

int main(void)
{
      USART_Config();

      TIM_OutPut_Config();
      TIM_Advance_Config();
      printf("这是一个TIM实验");
      while(1)
      {}
}

#include "bsp_TIM.h"
#include "stm32f10x.h"
#include <stdio.h>
void TIM_OutPut_Config()
{

      GPIO_InitTypeDef  GPIO_InitStruct;
      RCC_APB2PeriphClockCmd(RCC_APB2Periph_GPIOA,ENABLE);
      RCC_APB1PeriphClockCmd(RCC_APB1Periph_TIM3,ENABLE);
      GPIO_InitStruct.GPIO_Pin=GPIO_Pin_6;
      GPIO_InitStruct.GPIO_Mode=GPIO_Mode_AF_PP;
      GPIO_InitStruct.GPIO_Speed=GPIO_Speed_50MHz;
      GPIO_Init(GPIOA,&GPIO_InitStruct);


  TIM_TimeBaseInitTypeDef TIM_TimeBase_InitStruct;
      TIM_OCInitTypeDef  TIM_OC_InitStruct;
      TIM_TimeBase_InitStruct.TIM_ClockDivision=TIM_CKD_DIV1;
      TIM_TimeBase_InitStruct.TIM_CounterMode=TIM_CounterMode_Up;
      TIM_TimeBase_InitStruct.TIM_Period=9;
      TIM_TimeBase_InitStruct.TIM_Prescaler=71;
      TIM_TimeBase_InitStruct.TIM_RepetitionCounter=0;
      TIM_TimeBaseInit(TIM3,&TIM_TimeBase_InitStruct);

      TIM_OC_InitStruct.TIM_OCMode=TIM_OCMode_PWM1;
      TIM_OC_InitStruct.TIM_OCPolarity=TIM_OCPolarity_High;
      TIM_OC_InitStruct.TIM_OutputState=TIM_OutputState_Enable;
      TIM_OC_InitStruct.TIM_Pulse=5;
      TIM_OC1Init(TIM3,& TIM_OC_InitStruct);
      TIM_OC1PreloadConfig(TIM3,TIM_OCPreload_Enable);

      TIM_Cmd(TIM3,ENABLE);
}

void NVIC_Config()
{
  NVIC_InitTypeDef  NVIC_InitStruct;
      NVIC_PriorityGroupConfig(NVIC_PriorityGroup_1);
      NVIC_InitStruct.NVIC_IRQChannel= TIM1_CC_IRQn;
      NVIC_InitStruct.NVIC_IRQChannelPreemptionPriority=1;
      NVIC_InitStruct.NVIC_IRQChannelSubPriority=1;
      NVIC_InitStruct.NVIC_IRQChannelCmd=ENABLE;
      NVIC_Init(&NVIC_InitStruct);
}

void TIM_Advance_Config()
{

      GPIO_InitTypeDef  GPIO_InitStruct;
      NVIC_Config();
      RCC_APB2PeriphClockCmd(RCC_APB2Periph_GPIOA,ENABLE);
      GPIO_InitStruct.GPIO_Pin=GPIO_Pin_8;
      GPIO_InitStruct.GPIO_Mode=GPIO_Mode_IN_FLOATING;
      GPIO_Init(GPIOA,&GPIO_InitStruct);


RCC_APB2PeriphClockCmd(RCC_APB2Periph_TIM1,ENABLE);
/*--------------------时基结构体初始化-------------------------*/
      TIM_TimeBaseInitTypeDef  TIM_TimeBaseStructure;

      TIM_TimeBaseStructure.TIM_Period=999;

      TIM_TimeBaseStructure.TIM_Prescaler= 71;

      TIM_TimeBaseStructure.TIM_ClockDivision=TIM_CKD_DIV1;

      TIM_TimeBaseStructure.TIM_CounterMode=TIM_CounterMode_Up;

      TIM_TimeBaseStructure.TIM_RepetitionCounter=0;

      TIM_TimeBaseInit(TIM1, &TIM_TimeBaseStructure);

      /*--------------------输入捕获结构体初始化-------------------*/


  TIM_ICInitTypeDef  TIM_ICInitStructure;


  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 = 0x0;

  TIM_PWMIConfig(TIM1, &TIM_ICInitStructure);
  TIM_SelectInputTrigger(TIM1, TIM_TS_TI1FP1);

  TIM_SelectSlaveMode(TIM1, TIM_SlaveMode_Reset);
  TIM_SelectMasterSlaveMode(TIM1,TIM_MasterSlaveMode_Enable);


  TIM_ITConfig(TIM1, TIM_IT_CC1, ENABLE);

  TIM_ClearITPendingBit(TIM1, TIM_IT_CC1);

  TIM_Cmd(TIM1, ENABLE);

}

中断程序：
__IO uint16_t IC1Value=0;
__IO uint16_t IC2Value=0;
__IO float Frequency;
__IO float DutyCycle;
void  TIM1_CC_IRQHandler()
{
      TIM_ClearITPendingBit(TIM1,TIM_IT_CC1);
      IC1Value=TIM_GetCapture1(TIM1);
      IC2Value=TIM_GetCapture2(TIM1);
  if(IC1Value!=0)
  {
            DutyCycle= (float)((IC2Value+1) * 100) / (IC1Value+1);
            Frequency = (72000000/(71+1))/(float)(IC1Value+1);
            printf("占空比：%0.2f%% 频率：%0.2fHz\n",DutyCycle,Frequency);
      }
      else
      {
      Frequency=0;
            DutyCycle=0;
      }
}