stm32为什么就是进不到中断 配置都设置好了 求大神解答

#include "delay.h"
vola tile u8 u8_app_flag =0;
void main(void)
{
u16 flag;
RCC_Configuration();
RCC_APB2PeriphClockCmd(RCC_APB2Periph_GPIOE | RCC_APB2Periph_GPIOF | RCC_APB2Periph_GPIOG | RCC_APB2Periph_GPIOC | RCC_APB2Periph_ADC1,ENABLE);
GPIO_Configuration();
NVIC_Configuration();
TIM_Configuration();
//SysTick_Config();
while(1)
{
flag++;

if(u8_app_flag)
{
GPIO_ResetBits(GPIOE,GPIO_Pin_0 | GPIO_Pin_1 | GPIO_Pin_2 | GPIO_Pin_3 | GPIO_Pin_4 | GPIO_Pin_5 | GPIO_Pin_6 | GPIO_Pin_7);
GPIO_SetBits(GPIOE,GPIO_Pin_8 | GPIO_Pin_9 | GPIO_Pin_10);
GPIO_ResetBits(GPIOE,GPIO_Pin_8 | GPIO_Pin_9 | GPIO_Pin_10);
}
else
{
GPIO_SetBits(GPIOE,GPIO_Pin_0 | GPIO_Pin_1 | GPIO_Pin_2 | GPIO_Pin_3 | GPIO_Pin_4 | GPIO_Pin_5 | GPIO_Pin_6 | GPIO_Pin_7);
GPIO_SetBits(GPIOE,GPIO_Pin_8 | GPIO_Pin_9 | GPIO_Pin_10);
GPIO_ResetBits(GPIOE,GPIO_Pin_8 | GPIO_Pin_9 | GPIO_Pin_10);
}
}
}
下面为配置问价
#include "delay.h"
void Delay_ms(u16 time)
{
u16 i;
while(time--)
{
i=1200;
while(i--);
}
}
void RCC_Configuration(void)
{
ErrorStatus HSEStartUpStatus;

//将外设 RCC寄存器重设为缺省值
RCC_DeInit();

//设置外部高速晶振（HSE）
RCC_HSEConfig(RCC_HSE_ON);

//等待 HSE 起振
HSEStartUpStatus = RCC_WaitForHSEStartUp();

if(HSEStartUpStatus == SUCCESS)
{
//预取指缓存使能
FLASH_PrefetchBufferCmd(FLASH_PrefetchBuffer_Enable);

//设置代码延时值
//FLASH_Latency_2 2 延时周期
FLASH_SetLatency(FLASH_Latency_2);

//设置 AHB 时钟（HCLK）
//RCC_SYSCLK_Div1 AHB 时钟 = 系统时钟
RCC_HCLKConfig(RCC_SYSCLK_Div1);

//设置高速 AHB 时钟（PCLK2）
//RCC_HCLK_Div2 APB1 时钟 = HCLK / 2
RCC_PCLK2Config(RCC_HCLK_Div2);

//设置低速 AHB 时钟（PCLK1）
//RCC_HCLK_Div2 APB1 时钟 = HCLK / 2
RCC_PCLK1Config(RCC_HCLK_Div2);
//设置ADC时钟频率
RCC_ADCCLKConfig(RCC_PCLK2_Div2);

// PLLCLK = 8MHz * 9 = 72 MHz
//设置 PLL 时钟源及倍频系数
RCC_PLLConfig(RCC_PLLSource_HSE_Div1, RCC_PLLMul_9);

//使能或者失能 PLL
RCC_PLLCmd(ENABLE);

//等待指定的 RCC 标志位设置成功 等待PLL初始化成功
while(RCC_GetFlagStatus(RCC_FLAG_PLLRDY) == RESET)
{
}


//设置系统时钟（SYSCLK） 设置PLL为系统时钟源
RCC_SYSCLKConfig(RCC_SYSCLKSource_PLLCLK);

//等待PLL成功用作于系统时钟的时钟源
// 0x00：HSI 作为系统时钟
// 0x04：HSE作为系统时钟
// 0x08：PLL作为系统时钟
while(RCC_GetSYSCLKSource() != 0x08)
{
}
}


// RCC_AHBPeriphClockCmd(RCC_AHBPeriph_DMA1 , ENABLE);
// RCC_APB1PeriphClockCmd(RCC_APB1Periph_PWR | RCC_APB1Periph_BKP, ENABLE);


// RCC_ADCCLKConfig(RCC_PCLK2_Div6); //72M/6=12,ADC最大时间不能超过14M
RCC_APB2PeriphClockCmd(RCC_APB2Periph_GPIOA | RCC_APB2Periph_GPIOB | RCC_APB2Periph_GPIOC | RCC_APB2Periph_GPIOD | RCC_APB2Periph_GPIOE | RCC_APB2Periph_AFIO, ENABLE ); //使能ADC1通道时钟，各个管脚时钟
// RCC_APB2PeriphClockCmd(RCC_APB2Periph_USART1, ENABLE);// Enable USART1 clocks
// RCC_APB1PeriphClockCmd(RCC_APB1Periph_USART2, ENABLE);// Enable USART1 clocks

RCC_APB2PeriphClockCmd(RCC_APB2Periph_TIM1, ENABLE); // Enable TIM clocks


//RCC_APB1PeriphClockCmd(RCC_APB1Periph_TIM2 | RCC_APB1Periph_TIM3, ENABLE); // Enable TIM clocks
}


void NVIC_Configuration(void)
{
/* Enable the USART1 Interrupt */
NVIC_InitTypeDef NVIC_InitStructure;
#ifdef VECT_TAB_RAM
/* Set the Vector Table base location at 0x20000000 */
NVIC_SetVectorTable(NVIC_VectTab_RAM, 0x0);
#else /* VECT_TAB_FLASH */
/* Set the Vector Table base location at 0x08000000 */
NVIC_SetVectorTable(NVIC_VectTab_FLASH, 0x0);
#endif
NVIC_PriorityGroupConfig(NVIC_PriorityGroup_1); //选择中断分组2
//NVIC_InitStructure.NVIC_IRQChannel = USART1_IRQChannel;//选择串口1中断
//NVIC_InitStructure.NVIC_IRQChannelPreemptionPriority = 1;//抢占式中断优先级设置为0
//NVIC_InitStructure.NVIC_IRQChannelSubPriority = 1;//响应式中断优先级设置为0
//NVIC_InitStructure.NVIC_IRQChannelCmd = ENABLE;//使能中断
//NVIC_Init(&NVIC_InitStructure);

//NVIC_InitStructure.NVIC_IRQChannel =TIM1_UP_IRQChannel; //40us定时器
//NVIC_InitStructure.NVIC_IRQChannelPreemptionPriority = 1;
//NVIC_InitStructure.NVIC_IRQChannelSubPriority = 1;
//NVIC_InitStructure.NVIC_IRQChannelCmd =ENABLE;
//NVIC_Init(&NVIC_InitStructure);

NVIC_InitStructure.NVIC_IRQChannel = TIM3_IRQChannel; //使能TIM3总中断 比较输出 具有最高的优先级
NVIC_InitStructure.NVIC_IRQChannelPreemptionPriority = 1;
NVIC_InitStructure.NVIC_IRQChannelSubPriority = 1;
NVIC_InitStructure.NVIC_IRQChannelCmd = ENABLE;
NVIC_Init(&NVIC_InitStructure);

//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);
}
//////////////////////////////////////////////////////////////////////////////中断的初始化

//////////////////////////////////////////////////////////////////////////////定时器的初始化

void TIM_Configuration(void)
{
/**************************************
定时器3,1ms基本时间单位，系统时间
***************************************/
TIM_TimeBaseInitTypeDef TIM_BaseInitStructure;

/**************************************
定时器3,10us基本时间单位，系统时间
***************************************/

// TIM_BaseInitStructure.TIM_Period = 56000-1; //设置自动重装载值
// TIM_BaseInitStructure.TIM_Prescaler = 2; //暂不分频，下面再分频
TIM_BaseInitStructure.TIM_Period = 999; //设置自动重装载值
TIM_BaseInitStructure.TIM_Prescaler = 55; //暂不分频，下面再分频

TIM_BaseInitStructure.TIM_ClockDivision = 0; //时钟分割，无视之
TIM_BaseInitStructure.TIM_CounterMode = TIM_CounterMode_Up;//向上计数模式
TIM_TimeBaseInit(TIM3, &TIM_BaseInitStructure);

TIM_ITConfig(TIM3,TIM_IT_Update, ENABLE);
TIM_Cmd(TIM3, ENABLE);
}

void GPIO_Configuration(void)
{
GPIO_InitTypeDef GPIO_InitStructure;
GPIO_InitStructure.GPIO_Pin=GPIO_Pin_0 | GPIO_Pin_1 | GPIO_Pin_2 | GPIO_Pin_3 | GPIO_Pin_4 | GPIO_Pin_5 | GPIO_Pin_6 | GPIO_Pin_7 | GPIO_Pin_8 | GPIO_Pin_9 | GPIO_Pin_10;
GPIO_InitStructure.GPIO_Speed=GPIO_Speed_50MHz;
GPIO_InitStructure.GPIO_Mode=GPIO_Mode_Out_PP;
GPIO_Init(GPIOE,&GPIO_InitStructure); //初始化输出口

GPIO_InitStructure.GPIO_Pin=GPIO_Pin_All;
GPIO_InitStructure.GPIO_Speed=GPIO_Speed_2MHz;
GPIO_InitStructure.GPIO_Mode=GPIO_Mode_IN_FLOATING;
GPIO_Init(GPIOF,&GPIO_InitStructure); //初始化输入口F0--F15
GPIO_InitStructure.GPIO_Pin=GPIO_Pin_8 | GPIO_Pin_9 | GPIO_Pin_10 | GPIO_Pin_11 | GPIO_Pin_12 | GPIO_Pin_13 | GPIO_Pin_14 | GPIO_Pin_15;
GPIO_Init(GPIOG,&GPIO_InitStructure); //初始化输入口G8--G15
//GPIO_SetBits(GPIOE,GPIO_Pin_0 | GPIO_Pin_1 | GPIO_Pin_2 | GPIO_Pin_3 | GPIO_Pin_4 | GPIO_Pin_5 | GPIO_Pin_6 | GPIO_Pin_7);
//GPIO_SetBits(GPIOE,GPIO_Pin_8 | GPIO_Pin_9 | GPIO_Pin_10);
//GPIO_ResetBits(GPIOE,GPIO_Pin_8 | GPIO_Pin_9 | GPIO_Pin_10);
}
void SysTick_Configuration(void) //systick初始化函数
{
/* Disable SysTick Counter */
SysTick_CounterCmd(SysTick_Counter_Disable);

/* Disable the SysTick Interrupt */
SysTick_ITConfig(DISABLE);

/* Configure HCLK clock as SysTick clock source */
SysTick_CLKSourceConfig(SysTick_CLKSource_HCLK_Div8); //AHP时钟除以8,7M

/* SysTick interrupt each 1000 Hz with HCLK equal to 72MHz */
SysTick_SetReload(7000); //设置 SysTick重装载值

/* Enable the SysTick Interrupt */
SysTick_ITConfig(ENABLE); //中断使能
SysTick_CounterCmd(SysTick_Counter_Enable); //使能计数器

}
/*******************************************************************************
* Function Name : SysTick_Config
* Description : Configures SysTick
* Input : None
* Output : None
* Return : None
*******************************************************************************/
//SysTick设置
void SysTick_Config(void)
{
/* Disable SysTick Counter */
SysTick_CounterCmd(SysTick_Counter_Disable);

/* Disable the SysTick Interrupt */
SysTick_ITConfig(DISABLE);

/* Configure HCLK clock as SysTick clock source */
SysTick_CLKSourceConfig(SysTick_CLKSource_HCLK_Div8);

/* SysTick interrupt each 1000 Hz with HCLK equal to 72MHz */
SysTick_SetReload(9000);

/* Enable the SysTick Interrupt */
SysTick_ITConfig(ENABLE);
SysTick_CounterCmd(SysTick_Counter_Enable);
}