使用STM32F103设置TIM1输出6路PWM，配置刹车中断函数NVIC_Init( amp;NVIC_InitStructure)时程序在里面出不来的原因？

本人在使用STM32F103设置tiM1输出6路PWM时，配置刹车中断函数NVIC_Init( amp;NVIC_InitStructure)时，程序在里面出不来。不知为何原因。本人新手，望各位大侠指点。现贴出代码如下:
  ADC_InitTypeDef ADC_InitStructure;
  TIM_TimeBaseInitTypeDef TIM1_TimeBaseStructure;
  TIM_OCInitTypeDef TIM1_OCInitStructure;
  TIM_BDTRInitTypeDef TIM1_BDTRInitStructure;
  NVIC_InitTypeDef NVIC_InitStructure;
  GPIO_InitTypeDef GPIO_InitStructure;
  /* ADC1, ADC2, DMA, GPIO, TIM1 clocks enabling -----------------------------*/
  
  /* ADCCLK = PCLK2/6 */
  RCC_ADCCLKConfig(RCC_PCLK2_Div6);
  /* Enable DMA clock */
  RCC_AHBPeriphClockCmd(RCC_AHBPeriph_DMA1, ENABLE);
  
  /* Enable GPIOA, GPIOB, AFIO clocks */
  RCC_APB2PeriphClockCmd(RCC_APB2Periph_AFIO | RCC_APB2Periph_GPIOA |
                         RCC_APB2Periph_GPIOB, ENABLE);
  /* Enable ADC1 clock */
  RCC_APB2PeriphClockCmd(RCC_APB2Periph_ADC1, ENABLE);
  /* Enable ADC2 clock */
  RCC_APB2PeriphClockCmd(RCC_APB2Periph_ADC2, ENABLE);
   
  /* Enable TIM1 clock */
  RCC_APB2PeriphClockCmd(RCC_APB2Periph_TIM1, ENABLE);
     
  /* ADC1, ADC2, PWM pins configurations -------------------------------------*/
  GPIO_StructInit( amp;GPIO_InitStructure);
  /****** Configure PA.05,06,7(ADC Channels [5..7]) as analog input ****/
  GPIO_InitStructure.GPIO_Pin = GPIO_Pin_5 | GPIO_Pin_6 | GPIO_Pin_7;
  GPIO_InitStructure.GPIO_Mode = GPIO_Mode_AIN;
  GPIO_Init(GPIOA,  amp;GPIO_InitStructure);
     
  GPIO_StructInit( amp;GPIO_InitStructure);
  /****** Configure PA.03 (ADC Channels [3]) as analog input ******/
   GPIO_InitStructure.GPIO_Pin = GPIO_Pin_0|GPIO_Pin_1;
  GPIO_InitStructure.GPIO_Mode = GPIO_Mode_AIN;
  GPIO_Init(GPIOB,  amp;GPIO_InitStructure);
  /* TIM1 Peripheral Configuration -------------------------------------------*/
  /* TIM1 Registers reset */
  TIM_DeInit(TIM1);
  TIM_TimeBaseStructInit( amp;TIM1_TimeBaseStructure);
  /* Time Base configuration */
  TIM1_TimeBaseStructure.TIM_Prescaler = 0x0;   //预分频器不分频.
  TIM1_TimeBaseStructure.TIM_CounterMode = TIM_CounterMode_CenterAligned1; //计数模式为中央对称模式.
  TIM1_TimeBaseStructure.TIM_Period = PWM_PERIOD;  //计数周期.
  TIM1_TimeBaseStructure.TIM_ClockDivision = TIM_CKD_DIV2; //?? 2分频.???
  
  // Initial condition is REP=0 to set the UPDATE only on the underflow
  TIM1_TimeBaseStructure.TIM_RepetitionCounter = REP_RATE; //????
  TIM_TimeBaseInit(TIM1,  amp;TIM1_TimeBaseStructure);   //初始化TIM1时间计数单元 .
  
  TIM_OCStructInit( amp;TIM1_OCInitStructure);
  /* Channel 1, 2,3 in PWM mode */
  TIM1_OCInitStructure.TIM_OCMode = TIM_OCMode_PWM1;  //定时器模式为PWM1.
  TIM1_OCInitStructure.TIM_OutputState = TIM_OutputState_Enable; //输出状态使能.
  TIM1_OCInitStructure.TIM_OutputNState = TIM_OutputNState_Enable; //互补输出比较使能.                 
  TIM1_OCInitStructure.TIM_Pulse = 0x505; //dummy value   //脉宽(占空比).
  TIM1_OCInitStructure.TIM_OCPolarity = TIM_OCPolarity_High;  //输出极性为高电平有效.
  TIM1_OCInitStructure.TIM_OCNPolarity = TIM_OCNPolarity_High;  //互补输出也是高电平有效.      
  TIM1_OCInitStructure.TIM_OCIdleState = TIM_OCIdleState_Reset; //空闲时引脚状态.
  TIM1_OCInitStructure.TIM_OCNIdleState = LOW_SIDE_POLARITY;   //空闲时互补引脚状态.      
  
  TIM_OC1Init(TIM1,  amp;TIM1_OCInitStructure);
  TIM_OC2Init(TIM1,  amp;TIM1_OCInitStructure);
  TIM_OC3Init(TIM1,  amp;TIM1_OCInitStructure);
  
  /*Timer1 alternate function full remapping*/  
  GPIO_PinRemapConfig(GPIO_FullRemap_TIM1,ENABLE);  
  
  GPIO_StructInit( amp;GPIO_InitStructure);
  /* GPIOE Configuration: Channel 1, 1N, 2, 2N, 3, 3N and 4 Output */
  GPIO_InitStructure.GPIO_Pin = GPIO_Pin_8 | GPIO_Pin_9 | GPIO_Pin_10;
  GPIO_InitStructure.GPIO_Mode = GPIO_Mode_AF_PP;
  GPIO_InitStructure.GPIO_Speed = GPIO_Speed_50MHz;
  GPIO_Init(GPIOA,  amp;GPIO_InitStructure);
  
  /* Lock GPIOE Pin9 and Pin11 Pin 13 (High sides) */
// GPIO_PinLockConfig(GPIOE, GPIO_Pin_9 | GPIO_Pin_11 | GPIO_Pin_13);
  GPIO_StructInit( amp;GPIO_InitStructure);
  GPIO_InitStructure.GPIO_Pin = GPIO_Pin_13 | GPIO_Pin_14 | GPIO_Pin_15;
  GPIO_InitStructure.GPIO_Mode = GPIO_Mode_AF_PP;
  GPIO_InitStructure.GPIO_Speed = GPIO_Speed_50MHz;
  GPIO_Init(GPIOB,  amp;GPIO_InitStructure);
  GPIO_StructInit( amp;GPIO_InitStructure);
  /* GPIOE Configuration: BKIN pin */   
  GPIO_InitStructure.GPIO_Pin = GPIO_Pin_12;
  GPIO_InitStructure.GPIO_Mode = GPIO_Mode_IN_FLOATING;
  GPIO_Init(GPIOB,  amp;GPIO_InitStructure);  //刹车引脚默认初始化.
  
  TIM_OCStructInit( amp;TIM1_OCInitStructure);
  /* Channel 4 Configuration in OC */
  TIM1_OCInitStructure.TIM_OCMode = TIM_OCMode_PWM2;    //定时器模式为PWM1.
  TIM1_OCInitStructure.TIM_OutputState = TIM_OutputState_Enable;  //输出状态使能.
  TIM1_OCInitStructure.TIM_OutputNState = TIM_OutputNState_Disable;  //互补输出禁止.                 
  TIM1_OCInitStructure.TIM_Pulse = PWM_PERIOD - 1;       //计数脉宽(占空比).
  
  TIM1_OCInitStructure.TIM_OCPolarity = TIM_OCPolarity_High;   //输出极性为高电平有效.
  TIM1_OCInitStructure.TIM_OCNPolarity = TIM_OCNPolarity_Low;       //互补输出也是低电平有效.  
  TIM1_OCInitStructure.TIM_OCIdleState = TIM_OCIdleState_Reset;  //空闲状态下输出低电平.
  TIM1_OCInitStructure.TIM_OCNIdleState = LOW_SIDE_POLARITY;        //空闲装修下输出低电平.   
  
  TIM_OC4Init(TIM1,  amp;TIM1_OCInitStructure);
  
  /* Enables the TIM1 Preload on CC1 Register */
  TIM_OC1PreloadConfig(TIM1, TIM_OCPreload_Enable);  //使能通道1的预装载寄存器CCR1.
  /* Enables the TIM1 Preload on CC2 Register */
  TIM_OC2PreloadConfig(TIM1, TIM_OCPreload_Enable);
  /* Enables the TIM1 Preload on CC3 Register */
  TIM_OC3PreloadConfig(TIM1, TIM_OCPreload_Enable);
  /* Enables the TIM1 Preload on CC4 Register */
  TIM_OC4PreloadConfig(TIM1, TIM_OCPreload_Enable);
  /* Automatic Output enable, Break, dead time and lock configuration*///配置刹车和死区时间.
  TIM1_BDTRInitStructure.TIM_OSSRState = TIM_OSSRState_Enable;  //运行模式关闭状态使能.
  TIM1_BDTRInitStructure.TIM_OSSIState = TIM_OSSIState_Enable;  //空闲模式关闭状态使能.
  TIM1_BDTRInitStructure.TIM_LOCKLevel = TIM_LOCKLevel_1;    //锁定级别为1.
  TIM1_BDTRInitStructure.TIM_DeadTime = DEADTIME;
  TIM1_BDTRInitStructure.TIM_Break = TIM_Break_Enable;    //刹车功能使能.
  TIM1_BDTRInitStructure.TIM_BreakPolarity = TIM_BreakPolarity_Low;  //保护功能触发电平:high or low.
  TIM1_BDTRInitStructure.TIM_AutomaticOutput = TIM_AutomaticOutput_Disable; //自动输出禁止.
  TIM_BDTRConfig(TIM1,  amp;TIM1_BDTRInitStructure); ///配置刹车和死区时间.
  TIM_SelectOutputTrigger(TIM1, TIM_TRGOSource_Update);  //选择定时器TIM1输出触发模式.
  
  TIM_ClearITPendingBit(TIM1, TIM_IT_Break);  //清除刹车标志位.
  TIM_ITConfig(TIM1, TIM_IT_Break,ENABLE);   //使能刹车中断.
  
  /* TIM1 counter enable */
  TIM_Cmd(TIM1, ENABLE);
  
  // Resynch to have the Update evend during Undeflow
  TIM_GenerateEvent(TIM1, TIM_EventSource_Update);
  
  // Clear Update Flag
  TIM_ClearFlag(TIM1, TIM_FLAG_Update);
  
  TIM_ITConfig(TIM1, TIM_IT_Update, DISABLE); //禁止定时器TIM1溢出中断.
  
  TIM_ITConfig(TIM1, TIM_IT_CC4,DISABLE);   //禁止定时器TIM1通道4中断.
     
  /* ADC1 registers reset ----------------------------------------------------*/
  ADC_DeInit(ADC1);
  /* ADC2 registers reset ----------------------------------------------------*/
  ADC_DeInit(ADC2);
  
  /* Enable ADC1 */
  ADC_Cmd(ADC1, ENABLE);
  /* Enable ADC2 */
  ADC_Cmd(ADC2, ENABLE);
  
  /* ADC1 configuration ------------------------------------------------------*/
  ADC_StructInit( amp;ADC_InitStructure);
  ADC_InitStructure.ADC_Mode = ADC_Mode_InjecSimult;      //ADC选择注入同步模式.
  ADC_InitStructure.ADC_ScanConvMode = ENABLE;     //扫描模式使能.
  ADC_InitStructure.ADC_ContinuousConvMode = DISABLE;     //连续转换模式禁止.
  ADC_InitStructure.ADC_ExternalTrigConv = ADC_ExternalTrigConv_None; ///转换是由软件而不是由外部触发.
  ADC_InitStructure.ADC_DataAlign = ADC_DataAlign_Left;  //数据对其方式为左对齐.
  ADC_InitStructure.ADC_NbrOfChannel = 1;     //规则转换的ADC通道数目.
  ADC_Init(ADC1,  amp;ADC_InitStructure);
   
  /* ADC2 Configuration ------------------------------------------------------*/
  ADC_StructInit( amp;ADC_InitStructure);  
  ADC_InitStructure.ADC_ScanConvMode = ENABLE;   //扫描模式使能.
  ADC_InitStructure.ADC_ContinuousConvMode = DISABLE; //连续转换模式禁止.
  ADC_InitStructure.ADC_ExternalTrigConv = ADC_ExternalTrigConv_None;  ///转换是由软件而不是由外部触发.
  ADC_InitStructure.ADC_DataAlign = ADC_DataAlign_Left;    //数据对其方式为左对齐.
  ADC_InitStructure.ADC_NbrOfChannel = 1;     //规则转换的ADC通道数目.
  ADC_Init(ADC2,  amp;ADC_InitStructure);
  
  // Start calibration of ADC1
  ADC_StartCalibration(ADC1);  //上电校准ADC1.
  // Start calibration of ADC2
  ADC_StartCalibration(ADC2); //上电校准ADC2.
  
  // Wait for the end of ADCs calibration //等待ADC校准完成.
  while (ADC_GetCalibrationStatus(ADC1)  amp; ADC_GetCalibrationStatus(ADC2))
  {
  }
  
  SVPWM_3ShuntCurrentReadingCalibration();  //3相电流读校准.
   
  /* ADC2 Injected conversions configuration */
  ADC_InjectedSequencerLengthConfig(ADC2,2);
  
  ADC_InjectedChannelConfig(ADC2, PHASE_A_ADC_CHANNEL, 1,
                                                      SAMPLING_TIME_CK);
  ADC_InjectedChannelConfig(ADC2, TEMP_FDBK_CHANNEL, 2,
                                                      SAMPLING_TIME_CK);
  
  /* Configure one bit for preemption priority */
  NVIC_PriorityGroupConfig(NVIC_PriorityGroup_2);
  
  NVIC_StructInit( amp;NVIC_InitStructure);
  /* Enable the ADC Interrupt */
  NVIC_InitStructure.NVIC_IRQChannel = ADC1_2_IRQChannel; //中断源.
  NVIC_InitStructure.NVIC_IRQChannelPreemptionPriority = ADC_PRE_EMPTION_PRIORITY;
  NVIC_InitStructure.NVIC_IRQChannelSubPriority = ADC_SUB_PRIORITY;
  NVIC_InitStructure.NVIC_IRQChannelCmd = ENABLE;   //中断使能
  NVIC_Init( amp;NVIC_InitStructure);
  
  /* Enable the Update Interrupt */
  NVIC_InitStructure.NVIC_IRQChannel = TIM1_UP_IRQChannel;
  NVIC_InitStructure.NVIC_IRQChannelPreemptionPriority = TIM1_UP_PRE_EMPTION_PRIORITY;
  NVIC_InitStructure.NVIC_IRQChannelSubPriority = TIM1_UP_SUB_PRIORITY;
  NVIC_InitStructure.NVIC_IRQChannelCmd = ENABLE;
  NVIC_Init( amp;NVIC_InitStructure);
   
  /* Enable the TIM1 BRK Interrupt */
  NVIC_InitStructure.NVIC_IRQChannel = TIM1_BRK_IRQChannel;
  NVIC_InitStructure.NVIC_IRQChannelPreemptionPriority = BRK_PRE_EMPTION_PRIORITY;
  NVIC_InitStructure.NVIC_IRQChannelSubPriority = BRK_SUB_PRIORITY;
  NVIC_InitStructure.NVIC_IRQChannelCmd = ENABLE;
  NVIC_Init( amp;NVIC_InitStructure);
在执行到最后一个函数时，跳不出来！