EXTI9_5_IRQHandler(void)里边第二个中断进不去有大神指导一下吗

诗酒 · 发表于 2019-7-30 17:03:26

/******************** (C) 1209 Lab **************************
* 文件名  : UltrasonicWave.c
* 描述：超声波测距模块，UltrasonicWave_Configuration（）函数
         初始化超声模块，UltrasonicWave_StartMeasure（）函数
   启动测距，并将测得的数据通过串口1打印出来
* 实验平台：Mini STM32开发板  STM32F103RBT6
* 硬件连接：------------------
*       | PC8  - TRIG    |
*       | PC7  - ECHO    |
*          ------------------
* 库版本  ：ST3.5.0
*
* 作者：Lee
*********************************************************************************/

#include "UltrasonicWave.h"
#include "usart.h"
#include "timer.h"
#include "delay.h"

#define TRIG_PORT    GPIOC //TRIG
#define ECHO_PORT    GPIOC //ECHO
#define TRIG_PIN1    GPIO_Pin_8 //TRIG1
#define ECHO_PIN1    GPIO_Pin_7 //ECHO1
#define TRIG_PIN2    GPIO_Pin_6 //TRIG2
#define ECHO_PIN2    GPIO_Pin_5 //ECHO2
float d;
float e;
float UltrasonicWave_Distance1;    //计算出的距离
float UltrasonicWave_Distance2;    //计算出的距离
void UltrasonicWave_Configuration(void)
{
  GPIO_InitTypeDef GPIO_InitStructure;
EXTI_InitTypeDef EXTI_InitStructure;
NVIC_InitTypeDef NVIC_InitStructure;

GPIO_PinRemapConfig(GPIO_Remap_SWJ_JTAGDisable , ENABLE); //关闭jtag
  RCC_APB2PeriphClockCmd(RCC_APB2Periph_GPIOC|RCC_APB2Periph_AFIO, ENABLE);

  GPIO_InitStructure.GPIO_Pin = TRIG_PIN1 | TRIG_PIN2;    //PC8接TRIG
  GPIO_InitStructure.GPIO_Mode = GPIO_Mode_Out_PP;       //设为推挽输出模式
  GPIO_InitStructure.GPIO_Speed = GPIO_Speed_50MHz;
  GPIO_Init(TRIG_PORT,&GPIO_InitStructure);                   //初始化外设GPIO

  GPIO_InitStructure.GPIO_Pin = ECHO_PIN1 | ECHO_PIN2;       //PC7接ECH0
  GPIO_InitStructure.GPIO_Mode = GPIO_Mode_IPD;    //设为输入
  GPIO_Init(ECHO_PORT,&GPIO_InitStructure);    //初始化GPIOC

//GPIOC.7    中断线以及中断初始化配置
GPIO_EXTILineConfig(GPIO_PortSourceGPIOC,GPIO_PinSource7);

EXTI_InitStructure.EXTI_Line=EXTI_Line7;
  EXTI_InitStructure.EXTI_Mode=EXTI_Mode_Interrupt;
  EXTI_InitStructure.EXTI_Trigger=EXTI_Trigger_Rising;
  EXTI_InitStructure.EXTI_LineCmd=ENABLE;
  EXTI_Init(&EXTI_InitStructure); //根据EXTI_InitStruct中指定的参数初始化外设EXTI寄存器

GPIO_EXTILineConfig(GPIO_PortSourceGPIOC,GPIO_PinSource5);

EXTI_InitStructure.EXTI_Line=EXTI_Line5;
  EXTI_InitStructure.EXTI_Mode=EXTI_Mode_Interrupt;
  EXTI_InitStructure.EXTI_Trigger=EXTI_Trigger_Rising;
  EXTI_InitStructure.EXTI_LineCmd=ENABLE;
  EXTI_Init(&EXTI_InitStructure); //根据EXTI_InitStruct中指定的参数初始化外设EXTI寄存器

NVIC_InitStructure.NVIC_IRQChannel = EXTI9_5_IRQn; //使能按键所在的外部中断通道
  NVIC_InitStructure.NVIC_IRQChannelPreemptionPriority = 2; //抢占优先级2
  NVIC_InitStructure.NVIC_IRQChannelSubPriority = 2; //子优先级2
  NVIC_InitStructure.NVIC_IRQChannelCmd = ENABLE; //使能外部中断通道
  NVIC_Init(&NVIC_InitStructure);       //根据NVIC_InitStruct中指定的参数初始化外设NVIC寄存器
}

void EXTI9_5_IRQHandler(void)
{
delay_us(10); //延时10us
  if(EXTI_GetITStatus(EXTI_Line7) != RESET)
{
TIM_SetCounter(TIM2,0);
TIM_Cmd(TIM2, ENABLE);                                           //开启时钟
while(GPIO_ReadInputDataBit(ECHO_PORT,ECHO_PIN1));                   //等待低电平
TIM_Cmd(TIM2, DISABLE);                                  //定时器2失能
UltrasonicWave_Distance1=TIM_GetCounter(TIM2)*5*34/200.0;    //计算距离&&UltrasonicWave_Distance<150
if(UltrasonicWave_Distance1>0 && UltrasonicWave_Distance1<100)
{
d=UltrasonicWave_Distance1;
printf("distance1:%f cm\r\n",UltrasonicWave_Distance1);
}
EXTI_ClearITPendingBit(EXTI_Line7);  //清除EXTI7线路挂起位
}

if(EXTI_GetITStatus(EXTI_Line5) != RESET)
{
TIM_SetCounter(TIM3,0);
TIM_Cmd(TIM3, ENABLE);                                           //开启时钟
while(GPIO_ReadInputDataBit(ECHO_PORT,ECHO_PIN2));                   //等待低电平
TIM_Cmd(TIM3, DISABLE);                                  //定时器2失能
UltrasonicWave_Distance2=TIM_GetCounter(TIM3)*5*34/200.0;    //计算距离&&UltrasonicWave_Distance<150
if(UltrasonicWave_Distance2>0&&UltrasonicWave_Distance2<100)
{
e=UltrasonicWave_Distance2;
printf("distance2:%f cm",UltrasonicWave_Distance2);
}
EXTI_ClearITPendingBit(EXTI_Line5);  //清除EXTI7线路挂起位
}
}

void UltrasonicWave_StartMeasure(void)
{

GPIO_SetBits(TRIG_PORT,TRIG_PIN1);    //送>10US的高电平RIG_PORT,TRIG_PIN这两个在define中有?
GPIO_SetBits(TRIG_PORT,TRIG_PIN2);
  delay_us(20);                         //延时20US
  GPIO_ResetBits(TRIG_PORT,TRIG_PIN1);
  GPIO_ResetBits(TRIG_PORT,TRIG_PIN2);

}