请大家帮我看看，为何无法进入中断呢？？只看到灯循环点亮，按键却无法触发中断。

2019-03-23 20:33发布

站内问答 / STM32/STM8
9128 19 1555
下面的程序，是我从一个教程的代码上修改的，调了2天，还是不行，真急人。望大家多多指点，谢谢了
#include <stm32f10x_lib.h>
GPIO_InitTypeDef GPIO_InitStructure;
EXTI_InitTypeDef EXTI_InitStructure;
NVIC_InitTypeDef NVIC_InitStructure;
ErrorStatus HSEStartUpStatus;
  void  RCC_Config(void);
  void  GPIO_Config(void );  
  void  NVIC_Config(void );
  void  EXTI_Config(void );
  void  Delay(vu32 ncount);


int main(void)
{
   RCC_Config();
   GPIO_Config();  
   NVIC_Config();
   EXTI_Config();


while(1)
{
  GPIO_SetBits(GPIOD , GPIO_Pin_3);
  GPIO_ResetBits(GPIOD , GPIO_Pin_4|GPIO_Pin_7|GPIO_Pin_13);
  Delay(0xfffff);
  Delay(0xfffff);
  Delay(0xfffff);
  GPIO_SetBits(GPIOD , GPIO_Pin_4);
  GPIO_ResetBits(GPIOD , GPIO_Pin_3|GPIO_Pin_7|GPIO_Pin_13);
  Delay(0xfffff);
  Delay(0xfffff);
  Delay(0xfffff);
  GPIO_SetBits(GPIOD , GPIO_Pin_7);
  GPIO_ResetBits(GPIOD , GPIO_Pin_4|GPIO_Pin_3|GPIO_Pin_13);
  Delay(0xfffff);
  Delay(0xfffff);
  Delay(0xfffff);
  GPIO_SetBits(GPIOD , GPIO_Pin_13);
  GPIO_ResetBits(GPIOD , GPIO_Pin_4|GPIO_Pin_7|GPIO_Pin_3);
  Delay(0xfffff);
  Delay(0xfffff);
  Delay(0xfffff);
}
}

//延时程序
void Delay(vu32 ncount)
{
for(;ncount!=0;ncount--);
}

//步骤一系统初始化，使用固件模板中自带的SystemInit();函数即可。
void RCC_Config(void)
{
SystemInit();
//该函数配置系统时钟，其函数原型在system_stm32f10x.c
//RCC_APB2PeriphClockCmd( RCC_APB2Periph_GPIOA | RCC_APB2Periph_GPIOB | RCC_APB2Periph_GPIOC|RCC_APB2Periph_GPIOD | RCC_APB2Periph_GPIOE | RCC_APB2Periph_AFIO , ENABLE);
//使能所用时钟，主要是各个GPIO时钟，不要忘记RCC_APB2Periph_AFIO时钟使能
}
//步骤二GPIO 配置 ，使用 GPIO_Config()函数
void GPIO_Config(void)
{
GPIO_InitTypeDef GPIO_InitStructure;
RCC_APB2PeriphClockCmd(RCC_APB2Periph_GPIOB|RCC_APB2Periph_GPIOC|RCC_APB2Periph_GPIOD|RCC_APB2Periph_AFIO, ENABLE);
/*
* LD1 -> PD7 , LD2 -> PD13 , LD3 -> PD3 , LD4 -> PD4
* B3 -> PB8 , B4-> PC13
*/
RCC->APB2ENR|=0x09;
GPIO_InitStructure.GPIO_Pin = GPIO_Pin_7 |GPIO_Pin_13|GPIO_Pin_3|GPIO_Pin_4;  //配置PD为输出模式，由CPU驱动LED点亮
GPIO_InitStructure.GPIO_Speed = GPIO_Speed_50MHz;
GPIO_InitStructure.GPIO_Mode = GPIO_Mode_Out_PP;
GPIO_Init(GPIOD, &GPIO_InitStructure);

GPIO_InitStructure.GPIO_Pin = GPIO_Pin_8;                 
GPIO_InitStructure.GPIO_Speed = GPIO_Speed_50MHz;
GPIO_InitStructure.GPIO_Mode = GPIO_Mode_IN_FLOATING; //配置PB8为浮空输入模式FLOATING，触发中断1--IPU 上拉
GPIO_Init(GPIOB, &GPIO_InitStructure);

GPIO_InitStructure.GPIO_Pin = GPIO_Pin_13;
GPIO_InitStructure.GPIO_Speed = GPIO_Speed_50MHz;
GPIO_InitStructure.GPIO_Mode = GPIO_Mode_IN_FLOATING; //配置PC13为浮空输入模式，触发中断2
GPIO_Init(GPIOC, &GPIO_InitStructure);          
}
//步骤三EXTI 的配置。此步相当于单片机的中断配置,使用 EXTI_Config()函数
void EXTI_Config(void)
{

/* Initialize the EXTI Init Structure parameters */
EXTI_InitTypeDef EXTI_InitStructure;  //声明语句 要写在前面，一句就可以了

GPIO_EXTILineConfig(GPIO_PortSourceGPIOB, GPIO_PinSource9); // 管脚选择
EXTI_ClearITPendingBit(EXTI_Line9);         //清除中断标志位，进入中断后，先做清除中断标志位，否则它会不断响应中断，不断进入中断函数。
EXTI_InitStructure.EXTI_Mode = EXTI_Mode_Interrupt;
EXTI_InitStructure.EXTI_Trigger = EXTI_Trigger_Falling; //上升下降沿都触发 Falling  Rising
EXTI_InitStructure.EXTI_Line = EXTI_Line9; //EXTI_Line8，这个表示的是中断线8。对于外部中断中的GPIO，有16 个中断线，分别是0-15，刚好对应于每个GPIO 端口的0-15 引脚。
EXTI_InitStructure.EXTI_LineCmd = ENABLE;        //启动中断的接收
EXTI_Init(&EXTI_InitStructure);           //外部中断启动
EXTI_GenerateSWInterrupt(EXTI_Line9);       

GPIO_EXTILineConfig(GPIO_PortSourceGPIOC, GPIO_PinSource13);
EXTI_ClearITPendingBit(EXTI_Line13);         
EXTI_InitStructure.EXTI_Mode = EXTI_Mode_Interrupt;
EXTI_InitStructure.EXTI_Trigger = EXTI_Trigger_Falling;
EXTI_InitStructure.EXTI_Line = EXTI_Line13;
EXTI_InitStructure.EXTI_LineCmd = ENABLE;
EXTI_Init(&EXTI_InitStructure);       
EXTI_GenerateSWInterrupt(EXTI_Line13);         
}
//步骤四NVIC 配置。先解释下NVIC，它的中文全称是“嵌套向量中断控制器"。用的是NVIC_Config()函数
void NVIC_Config(void)
{

NVIC_InitTypeDef NVIC_InitStructure;

NVIC_PriorityGroupConfig(NVIC_PriorityGroup_0);         //for中断1
NVIC_InitStructure.NVIC_IRQChannel = EXTI2_IRQChannel;
NVIC_InitStructure.NVIC_IRQChannelPreemptionPriority = 0;
NVIC_InitStructure.NVIC_IRQChannelSubPriority = 0;
NVIC_InitStructure.NVIC_IRQChannelCmd = ENABLE;
NVIC_Init(&NVIC_InitStructure);
       
NVIC_PriorityGroupConfig(NVIC_PriorityGroup_1);           //for中断2
NVIC_InitStructure.NVIC_IRQChannel = EXTI3_IRQChannel;
NVIC_InitStructure.NVIC_IRQChannelPreemptionPriority = 1;
NVIC_InitStructure.NVIC_IRQChannelSubPriority = 1;
NVIC_InitStructure.NVIC_IRQChannelCmd = ENABLE;
NVIC_Init(&NVIC_InitStructure);          
}
//步骤五中断服务子程序的编写。
void EXTI9_IRQHandler(void)                        //中断1
{
if ( EXTI_GetITStatus(EXTI_Line9) != RESET )  //判断外部中断1的标志位是否为1，
{
EXTI_ClearITPendingBit(EXTI_Line9);                   //若外部中断1的标志位为1，则清中断标志位
GPIO_ResetBits(GPIOD , GPIO_Pin_3|GPIO_Pin_4|GPIO_Pin_7|GPIO_Pin_13);  //给PD口的3、4、7、13脚置0
Delay(0xfffff);
Delay(0xfffff);
Delay(0xfffff);
EXTI_ClearFlag( EXTI_Line9);           //清中断标志
}
}

void EXTI13_IRQHandler(void)                        //中断2
{
if ( EXTI_GetITStatus(EXTI_Line13) != RESET )
{
EXTI_ClearITPendingBit(EXTI_Line13);  //清中断
GPIO_SetBits(GPIOD , GPIO_Pin_3|GPIO_Pin_4|GPIO_Pin_7|GPIO_Pin_13);        //给PD口的3、4、7、13脚置1（set）
Delay(0xfffff);
Delay(0xfffff);
Delay(0xfffff);
EXTI_ClearFlag( EXTI_Line13);           //清中断标志  
}  
   
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19条回答
ploughman
2019-03-24 16:41
原帖由 daicheng 于 2011-2-17 14:04 发表 你看看你的.s中的名子,如果是void EXTI9_5_IRQHandler(void)与void EXTI15_10_IRQHandler(void)你修改你的函数名 9_5与5_10 表示外部中断9到5的中断处理函数 和10到15的处理函数


帮看看.s文件里改后的部分，改的对么？

                ; External Interrupts
                DCD     WWDG_IRQHandler           ; Window Watchdog
                DCD     PVD_IRQHandler            ; PVD through EXTI Line detect
                DCD     TAMPER_IRQHandler         ; Tamper
                DCD     RTC_IRQHandler            ; RTC
                DCD     FLASH_IRQHandler          ; Flash
                DCD     RCC_IRQHandler            ; RCC
                DCD     EXTI0_IRQHandler          ; EXTI Line 0
                DCD     EXTI1_IRQHandler          ; EXTI Line 1
                DCD     EXTI2_IRQHandler          ; EXTI Line 2
                DCD     EXTI3_IRQHandler          ; EXTI Line 3
                DCD     EXTI4_IRQHandler          ; EXTI Line 4
                DCD     DMAChannel1_IRQHandler    ; DMA Channel 1
                DCD     DMAChannel2_IRQHandler    ; DMA Channel 2
                DCD     DMAChannel3_IRQHandler    ; DMA Channel 3
                DCD     DMAChannel4_IRQHandler    ; DMA Channel 4
                DCD     DMAChannel5_IRQHandler    ; DMA Channel 5
                DCD     DMAChannel6_IRQHandler    ; DMA Channel 6
                DCD     DMAChannel7_IRQHandler    ; DMA Channel 7
                DCD     ADC_IRQHandler            ; ADC
                DCD     USB_HP_CAN_TX_IRQHandler  ; USB High Priority or CAN TX
                DCD     USB_LP_CAN_RX0_IRQHandler ; USB Low  Priority or CAN RX0
                DCD     CAN_RX1_IRQHandler        ; CAN RX1
                DCD     CAN_SCE_IRQHandler        ; CAN SCE
                DCD     EXTI9_IRQHandler      ; EXTI Line 9..5
                DCD     TIM1_BRK_IRQHandler       ; TIM1 Break
                DCD     TIM1_UP_IRQHandler        ; TIM1 Update
                DCD     TIM1_TRG_COM_IRQHandler   ; TIM1 Trigger and Commutation
                DCD     TIM1_CC_IRQHandler        ; TIM1 Capture Compare
                DCD     TIM2_IRQHandler           ; TIM2
                DCD     TIM3_IRQHandler           ; TIM3
                DCD     TIM4_IRQHandler           ; TIM4
                DCD     I2C1_EV_IRQHandler        ; I2C1 Event
                DCD     I2C1_ER_IRQHandler        ; I2C1 Error
                DCD     I2C2_EV_IRQHandler        ; I2C2 Event
                DCD     I2C2_ER_IRQHandler        ; I2C2 Error
                DCD     SPI1_IRQHandler           ; SPI1
                DCD     SPI2_IRQHandler           ; SPI2
                DCD     USART1_IRQHandler         ; USART1
                DCD     USART2_IRQHandler         ; USART2
                DCD     USART3_IRQHandler         ; USART3
                DCD     EXTI13_IRQHandler      ; EXTI Line 15..10
                DCD     RTCAlarm_IRQHandler       ; RTC Alarm through EXTI Line
                DCD     USBWakeUp_IRQHandler      ; USB Wakeup from suspend

Default_Handler PROC
                EXPORT  WWDG_IRQHandler           [WEAK]
                EXPORT  PVD_IRQHandler            [WEAK]
                EXPORT  TAMPER_IRQHandler         [WEAK]
                EXPORT  RTC_IRQHandler            [WEAK]
                EXPORT  FLASH_IRQHandler          [WEAK]
                EXPORT  RCC_IRQHandler            [WEAK]
                EXPORT  EXTI0_IRQHandler          [WEAK]
                EXPORT  EXTI1_IRQHandler          [WEAK]
                EXPORT  EXTI2_IRQHandler          [WEAK]
                EXPORT  EXTI3_IRQHandler          [WEAK]
                EXPORT  EXTI4_IRQHandler          [WEAK]
                EXPORT  DMAChannel1_IRQHandler    [WEAK]
                EXPORT  DMAChannel2_IRQHandler    [WEAK]
                EXPORT  DMAChannel3_IRQHandler    [WEAK]
                EXPORT  DMAChannel4_IRQHandler    [WEAK]
                EXPORT  DMAChannel5_IRQHandler    [WEAK]
                EXPORT  DMAChannel6_IRQHandler    [WEAK]
                EXPORT  DMAChannel7_IRQHandler    [WEAK]
                EXPORT  ADC_IRQHandler            [WEAK]
                EXPORT  USB_HP_CAN_TX_IRQHandler  [WEAK]
                EXPORT  USB_LP_CAN_RX0_IRQHandler [WEAK]
                EXPORT  CAN_RX1_IRQHandler        [WEAK]
                EXPORT  CAN_SCE_IRQHandler        [WEAK]
                EXPORT  EXTI9_IRQHandler        [WEAK]
                EXPORT  TIM1_BRK_IRQHandler       [WEAK]
                EXPORT  TIM1_UP_IRQHandler        [WEAK]
                EXPORT  TIM1_TRG_COM_IRQHandler   [WEAK]
                EXPORT  TIM1_CC_IRQHandler        [WEAK]
                EXPORT  TIM2_IRQHandler           [WEAK]
                EXPORT  TIM3_IRQHandler           [WEAK]
                EXPORT  TIM4_IRQHandler           [WEAK]
                EXPORT  I2C1_EV_IRQHandler        [WEAK]
                EXPORT  I2C1_ER_IRQHandler        [WEAK]
                EXPORT  I2C2_EV_IRQHandler        [WEAK]
                EXPORT  I2C2_ER_IRQHandler        [WEAK]
                EXPORT  SPI1_IRQHandler           [WEAK]
                EXPORT  SPI2_IRQHandler           [WEAK]
                EXPORT  USART1_IRQHandler         [WEAK]
                EXPORT  USART2_IRQHandler         [WEAK]
                EXPORT  USART3_IRQHandler         [WEAK]
                EXPORT  EXTI13_IRQHandler      [WEAK]
                EXPORT  RTCAlarm_IRQHandler       [WEAK]
                EXPORT  USBWakeUp_IRQHandler      [WEAK]

WWDG_IRQHandler
PVD_IRQHandler
TAMPER_IRQHandler
RTC_IRQHandler
FLASH_IRQHandler
RCC_IRQHandler
EXTI0_IRQHandler
EXTI1_IRQHandler
EXTI2_IRQHandler
EXTI3_IRQHandler
EXTI4_IRQHandler
DMAChannel1_IRQHandler
DMAChannel2_IRQHandler
DMAChannel3_IRQHandler
DMAChannel4_IRQHandler
DMAChannel5_IRQHandler
DMAChannel6_IRQHandler
DMAChannel7_IRQHandler
ADC_IRQHandler
USB_HP_CAN_TX_IRQHandler
USB_LP_CAN_RX0_IRQHandler
CAN_RX1_IRQHandler
CAN_SCE_IRQHandler
EXTI9_IRQHandler
TIM1_BRK_IRQHandler
TIM1_UP_IRQHandler
TIM1_TRG_COM_IRQHandler
TIM1_CC_IRQHandler
TIM2_IRQHandler
TIM3_IRQHandler
TIM4_IRQHandler
I2C1_EV_IRQHandler
I2C1_ER_IRQHandler
I2C2_EV_IRQHandler
I2C2_ER_IRQHandler
SPI1_IRQHandler
SPI2_IRQHandler
USART1_IRQHandler
USART2_IRQHandler
USART3_IRQHandler
EXTI13_IRQHandler
RTCAlarm_IRQHandler
USBWakeUp_IRQHandler

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