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標題: STM32單片機外部中斷失效? [打印本頁]

作者: 1363035157 時間: 2023-3-26 16:58
標題: STM32單片機外部中斷失效?
大佬們幫忙看看，外部中斷初始化后按鍵按下沒有作用，不知道是什么問題呀？大佬們看看下面單片機源碼:
exit.c
#include "exti.h"
#include "oled.h"
#include "key.h"
#include "risk.h"
#include "delay.h"
#include "usart.h"

extern int oledSwitchFlag;       //oledSwitchFlag實現外部中斷切換頁面
extern int valueMode;             //valueMode實現閾值上限下限的切換  0-上限 1-下限

extern int temp_up, temp_low;                                              //溫度閾值, up上限，low下限
extern int humi_up, humi_low;                                              //濕度閾值, up上限，low下限
extern int hydr_up;                                                                      //氫氣閾值, up上限，氣體只設置上限閾值
extern int carbon_up;                                                             //一氧化碳閾值, up上限，氣體只設置上限閾值
extern int natgas_up;                                                             //天然氣閾值, up上限，氣體只設置上限閾值
extern int Timer3_Switch;                                                       //定時器TIM3的開關標記位
extern int riskFlag;

void EXTIX_Init(void)
{

         EXTI_InitTypeDef EXTI_InitStructure;
      NVIC_InitTypeDef NVIC_InitStructure;

      KEYInit();                                                                               //按鍵模塊初始化

      RCC_APB2PeriphClockCmd(RCC_APB2Periph_AFIO,ENABLE);

//GPIOB12       //KEY_Mode
      GPIO_EXTILineConfig(GPIO_PortSourceGPIOB,GPIO_PinSource12);
      EXTI_InitStructure.EXTI_Line=EXTI_Line12;
      EXTI_InitStructure.EXTI_Mode = EXTI_Mode_Interrupt;
      EXTI_InitStructure.EXTI_Trigger = EXTI_Trigger_Falling;
      EXTI_Init(&EXTI_InitStructure);

//GPIOB13       //KEY_Add
      GPIO_EXTILineConfig(GPIO_PortSourceGPIOB,GPIO_PinSource13);
      EXTI_InitStructure.EXTI_Line=EXTI_Line13;
      EXTI_Init(&EXTI_InitStructure);

      //GPIOB14       //KEY_Reduce
      GPIO_EXTILineConfig(GPIO_PortSourceGPIOB,GPIO_PinSource14);
      EXTI_InitStructure.EXTI_Line=EXTI_Line14;
      EXTI_Init(&EXTI_InitStructure);

      //GPIOB15       //KEY_Control
      GPIO_EXTILineConfig(GPIO_PortSourceGPIOB,GPIO_PinSource15);
      EXTI_InitStructure.EXTI_Line=EXTI_Line15;
      EXTI_Init(&EXTI_InitStructure);

//GPIOA.0          PA0  WK_UP
      GPIO_EXTILineConfig(GPIO_PortSourceGPIOA,GPIO_PinSource0);

      EXTI_InitStructure.EXTI_Line=EXTI_Line0;
      EXTI_InitStructure.EXTI_Trigger = EXTI_Trigger_Rising;
      EXTI_Init(&EXTI_InitStructure);

      NVIC_InitStructure.NVIC_IRQChannel = EXTI0_IRQn;
      NVIC_InitStructure.NVIC_IRQChannelPreemptionPriority = 0x00;
      NVIC_InitStructure.NVIC_IRQChannelSubPriority = 0x00;
      NVIC_InitStructure.NVIC_IRQChannelCmd = ENABLE;
      NVIC_Init(&NVIC_InitStructure);

      NVIC_InitStructure.NVIC_IRQChannel = EXTI15_10_IRQn;
      NVIC_InitStructure.NVIC_IRQChannelPreemptionPriority = 0x00;
      NVIC_InitStructure.NVIC_IRQChannelSubPriority = 0x01;
      NVIC_InitStructure.NVIC_IRQChannelCmd = ENABLE;
      NVIC_Init(&NVIC_InitStructure);

}

void EXTI0_IRQHandler(void)
{
      delay_ms(10);
      if(WK_UP == 1){
            Risk != Risk;
      }
      EXTI_ClearITPendingBit(EXTI_Line0);
}

void EXTI15_10_IRQHandler(void)
{
      delay_ms(10);
      if(KEY_Mode == 0){                      //模式按鍵
            oledSwitchFlag++;
            OLED_Clear();
            UsartPrintf(USART_DEBUG,"oledSwitchFlag=%d\r\n",oledSwitchFlag);
            if(valueMode != 0)
                     valueMode = 0;
            if(oledSwitchFlag == 6)
                     oledSwitchFlag = 0;
            EXTI_ClearITPendingBit(EXTI_Line12);
      }

      if(KEY_Add == 0){                      //數值加
            if(oledSwitchFlag == 0)       //控制警報
                     riskFlag = 0;

            if(oledSwitchFlag == 1){
                     if(valueMode == 0){
                              temp_up++;
                              if(temp_up > 99)
                                    temp_up = 0;
                     }else{
                              temp_low++;
                              if(temp_low > 99)
                                    temp_low = 0;
                     }
            }else if(oledSwitchFlag == 2){
                     if(valueMode == 0){
                              humi_up++;
                              if(humi_up > 99)
                                    humi_up = 0;
                     }else{
                              humi_low++;
                              if(humi_low > 99)
                                    humi_low = 0;
                     }
            }else if(oledSwitchFlag == 3){
                     hydr_up++;
                     if(hydr_up > 99)
                              hydr_up = 0;
            }else if(oledSwitchFlag == 4){
                     carbon_up++;
                     if(carbon_up > 99)
                              carbon_up = 0;
            }else if(oledSwitchFlag == 5){
                     natgas_up++;
                     if(natgas_up > 99)
                              natgas_up = 0;
            }
            EXTI_ClearITPendingBit(EXTI_Line13);
      }

      if(KEY_Reduce == 0){             //數值減
            if(oledSwitchFlag == 1){
                     if(valueMode == 0){
                              temp_up--;
                              if(temp_up < 0)
                                    temp_up = 99;
                     }else{
                              temp_low--;
                              if(temp_low < 0)
                                    temp_low = 99;
                     }
            }else if(oledSwitchFlag == 2){
                     if(valueMode == 0){
                              humi_up--;
                              if(humi_up < 0)
                                    humi_up = 99;
                     }else{
                              humi_low--;
                              if(humi_low < 0)
                                    humi_low = 99;
                     }
            }else if(oledSwitchFlag == 3){
                     hydr_up--;
                     if(hydr_up < 0)
                              hydr_up = 99;
            }else if(oledSwitchFlag == 4){
                     carbon_up--;
                     if(carbon_up < 0)
                              carbon_up = 99;
            }else if(oledSwitchFlag == 5){
                     natgas_up--;
                     if(natgas_up < 0)
                              natgas_up = 99;
            }
            EXTI_ClearITPendingBit(EXTI_Line14);
      }

      if(KEY_Control == 0){             //控制光標和數據動態切屏
            if(oledSwitchFlag == 0){
                     if(Timer3_Switch == 1){
                              TIM_Cmd(TIM3, DISABLE);       //關閉定時器TIM3
                              Timer3_Switch = 0;
                     }else if(Timer3_Switch ==0){
                              TIM_Cmd(TIM3, ENABLE);       //打開定時器TIM3
                              Timer3_Switch = 1;
                     }
            }else if(oledSwitchFlag == 1 || oledSwitchFlag == 2){
                     valueMode++;
                     OLED_Clear();
                     if(valueMode > 1)
                              valueMode = 0;
            }
            EXTI_ClearITPendingBit(EXTI_Line15);
      }
}

key.c
#include "key.h"

void KEYInit(void){
      GPIO_InitTypeDef GPIO_InitStructure;

      RCC_APB2PeriphClockCmd(RCC_APB2Periph_GPIOA|RCC_APB2Periph_GPIOB,ENABLE);

      GPIO_InitStructure.GPIO_Pin=GPIO_Pin_12|GPIO_Pin_13|GPIO_Pin_14|GPIO_Pin_15;
      GPIO_InitStructure.GPIO_Mode=GPIO_Mode_IPU;
      GPIO_Init(GPIOB ,&GPIO_InitStructure);

      GPIO_InitStructure.GPIO_Pin=GPIO_Pin_0;
      GPIO_InitStructure.GPIO_Mode=GPIO_Mode_IPD;
      GPIO_Init(GPIOA,&GPIO_InitStructure);
}

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