STM32外部中断函数跳转问题

下面是一个按键中断实验代码，实现功能为：按下按键LED亮，再按LED灭，但在程序中没发现有中断函数，请问中断一旦触发，会跳转到什么地方，如何执行？
#include <stm32f10x.h>
/******************************** 变量定义 --------------------*/
EXTI_InitTypeDef EXTI_InitStructure;
ErrorStatus HSEStartUpStatus;
/*********************************声明函数 --------------------*/
void RCC_Configuration(void);
void GPIO_Configuration(void);
void NVIC_Configuration(void);
/***************主函数*******************************/
int main(void)
{
#ifdef DEBUG
debug();
#endif
RCC_Configuration(); //系统时钟配置
NVIC_Configuration(); //NVIC配置
GPIO_Configuration(); //配置GPIO
GPIO_EXTILineConfig(GPIO_PortSourceGPIOB, GPIO_PinSource6); /*将EXTI线6连接到PB6*/
/* Configure Key Button EXTI Line to generate an interrupt on falling edge */
//配置按钮中断线触发方式
EXTI_InitStructure.EXTI_Line = EXTI_Line6;
EXTI_InitStructure.EXTI_Mode = EXTI_Mode_Interrupt;
EXTI_InitStructure.EXTI_Trigger = EXTI_Trigger_Falling; //下降沿触发
EXTI_InitStructure.EXTI_LineCmd = ENABLE; //中断线使能
EXTI_Init(&EXTI_InitStructure); //初始化中断
/* Generate software interrupt: simulate a falling edge applied on Key Button EXTI line */
EXTI_GenerateSWInterrupt(EXTI_Line6); //EXTI_Line6中断允许 到此中断配置完成,可以写中断处理函数。
while (1)
{ }
}
/***************** RCC配置**************************/
void RCC_Configuration(void)
{
RCC_DeInit(); //复位RCC外部设备寄存器到默认值
RCC_HSEConfig(RCC_HSE_ON); //打开外部高速晶振
HSEStartUpStatus = RCC_WaitForHSEStartUp(); //等待外部高速时钟准备好
if(HSEStartUpStatus == SUCCESS) //外部高速时钟已经准别好
{
FLASH_PrefetchBufferCmd(FLASH_PrefetchBuffer_Enable);
FLASH_SetLatency(FLASH_Latency_2);
RCC_HCLKConfig(RCC_SYSCLK_Div1); //配置AHB(HCLK)时钟=SYSCLK
RCC_PCLK2Config(RCC_HCLK_Div1); //配置APB2(PCLK2)钟=AHB时钟
RCC_PCLK1Config(RCC_HCLK_Div2); //配置APB1(PCLK1)钟=AHB 1/2时钟
RCC_ADCCLKConfig(RCC_PCLK2_Div4); //配置ADC时钟=PCLK2 1/4
RCC_PLLConfig(RCC_PLLSource_HSE_Div1, RCC_PLLMul_9); //配置PLL时钟=外部高速晶体时钟*9
RCC_ADCCLKConfig(RCC_PCLK2_Div4);//配置ADC时钟= PCLK2/4
RCC_PLLCmd(ENABLE); //使能PLL时钟
while(RCC_GetFlagStatus(RCC_FLAG_PLLRDY) == RESET) //等待PLL时钟就绪
{ }
RCC_SYSCLKConfig(RCC_SYSCLKSource_PLLCLK); //配置系统时钟 = PLL时钟
while(RCC_GetSYSCLKSource() != 0x08) //检查PLL时钟是否作为系统时钟
{ }
}
RCC_APB2PeriphClockCmd(RCC_APB2Periph_GPIOA |RCC_APB2Periph_GPIOB\
| RCC_APB2Periph_AFIO, ENABLE); /* Enable Key Button GPIO Port, GPIO_LED and AFIO clock */
}
/*************************************************
函数: void GPIO_Config(void）
功能: GPIO配置
**************************************************/
void GPIO_Configuration(void)
{
GPIO_InitTypeDef GPIO_InitStructure;
GPIO_InitStructure.GPIO_Pin = GPIO_Pin_8;
GPIO_InitStructure.GPIO_Speed = GPIO_Speed_50MHz;
GPIO_InitStructure.GPIO_Mode = GPIO_Mode_Out_PP; //推挽输入
GPIO_Init(GPIOB, &GPIO_InitStructure);
GPIO_InitStructure.GPIO_Pin = GPIO_Pin_6;
GPIO_InitStructure.GPIO_Mode = GPIO_Mode_IN_FLOATING; //配置浮空输入
GPIO_Init(GPIOB, &GPIO_InitStructure);
}
/*******************************************************************************
* Function Name : NVIC_Configuration
* Description : Configure the nested vectored interrupt controller.
* Input : None * Output : None * Return : None
*******************************************************************************/
void NVIC_Configuration(void)
{
NVIC_InitTypeDef NVIC_InitStructure;
#ifdef VECT_TAB_RAM
/* Set the Vector Table base location at 0x20000000 */
NVIC_SetVectorTable(NVIC_VectTab_RAM, 0x0); //分配中断向量表
#else /* VECT_TAB_FLASH */
NVIC_SetVectorTable(NVIC_VectTab_FLASH, 0x0); //Set the Vector Table base location at 0x08000000
#endif
/* Configure one bit for preemption priority */
NVIC_PriorityGroupConfig(NVIC_PriorityGroup_1); //设置中断优先级
/* Enable the EXTI9_5 Interrupt */
NVIC_InitStructure.NVIC_IRQChannel = EXTI9_5_IRQn; //中断通道
NVIC_InitStructure.NVIC_IRQChannelPreemptionPriority = 0; //强占优先级
NVIC_InitStructure.NVIC_IRQChannelSubPriority = 0;//次优先级
NVIC_InitStructure.NVIC_IRQChannelCmd = ENABLE; //通道中断使能
NVIC_Init(&NVIC_InitStructure);//初始化中断
}
#ifdef DEBUG
/*******************************************************************************
* Function Name : assert_failed
* Description : Reports the name of the source file and the source line number
* where the assert_param error has occurred.
* Input : - file: pointer to the source file name
* - line: assert_param error line source number
* Output : None * Return : None
*******************************************************************************/
void assert_failed(u8* file, u32 line)
{
/* User can add his own implementation to report the file name and line number,
ex: printf("Wrong parameters value: file %s on line %d\r\n", file, line) */
/* Infinite loop */
while (1)
{ }
}
#endif