定时器初始化函数 无法正常运行 求助！！

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timer.c

#include "timer.h"
#include "led.h"
#include "usart.h"


///////////////////////////////////////////////////////////////////TIM5初始化函数/////////////////////////////////////

TIM_ICInitTypeDef  TIM_ICInitStructure;
void TIM5_CH1_Cap_Init(u32 arr,u16 psc)
{
GPIO_InitTypeDef GPIO_InitStructure;
TIM_TimeBaseInitTypeDef  TIM_TimeBaseStructure;
NVIC_InitTypeDef NVIC_InitStructure;


RCC_APB1PeriphClockCmd(RCC_APB1Periph_TIM5,ENABLE);  
RCC_AHB1PeriphClockCmd(RCC_AHB1Periph_GPIOA, ENABLE);  

GPIO_InitStructure.GPIO_Pin = GPIO_Pin_0; //GPIOA0
GPIO_InitStructure.GPIO_Mode = GPIO_Mode_AF;
GPIO_InitStructure.GPIO_Speed = GPIO_Speed_50MHz;
GPIO_InitStructure.GPIO_OType = GPIO_OType_PP;
GPIO_InitStructure.GPIO_PuPd = GPIO_PuPd_DOWN;
GPIO_Init(GPIOA,&GPIO_InitStructure);
GPIO_PinAFConfig(GPIOA,GPIO_PinSource0,GPIO_AF_TIM5);
  
   
TIM_TimeBaseStructure.TIM_Prescaler=psc;
TIM_TimeBaseStructure.TIM_CounterMode=TIM_CounterMode_Up;
TIM_TimeBaseStructure.TIM_Period=arr;   
TIM_TimeBaseStructure.TIM_ClockDivision=TIM_CKD_DIV1;

TIM_TimeBaseInit(TIM5,&TIM_TimeBaseStructure);


//³õʼ»¯TIM5ÊäÈ벶»ñ²ÎÊý
TIM5_ICInitStructure.TIM_Channel = TIM_Channel_1;
  TIM5_ICInitStructure.TIM_ICPolarity = TIM_ICPolarity_Falling;
  TIM5_ICInitStructure.TIM_ICSelection = TIM_ICSelection_DirectTI;
  TIM5_ICInitStructure.TIM_ICPrescaler = TIM_ICPSC_DIV1;  
  TIM5_ICInitStructure.TIM_ICFilter = 0x00;
  TIM_ICInit(TIM5, &TIM5_ICInitStructure);
  
TIM_ITConfig(TIM5,TIM_IT_Update|TIM_IT_CC1,ENABLE);

  TIM_Cmd(TIM5,ENABLE );  

  NVIC_InitStructure.NVIC_IRQChannel = TIM5_IRQn;
NVIC_InitStructure.NVIC_IRQChannelPreemptionPriority=1;
NVIC_InitStructure.NVIC_IRQChannelSubPriority =0;  
NVIC_InitStructure.NVIC_IRQChannelCmd = ENABLE;   
NVIC_Init(&NVIC_InitStructure);

TIM_ClearITPendingBit(TIM5, TIM_IT_CC1|TIM_IT_Update);
}


//中断服务函数///////////////////////////////////////////////////////////////////////////////////////////////////////////

u8  TIM5CH1_CAPTURE_STA=0;  
u32 TIM5CH1_CAPTURE_VAL1,TIM5CH1_CAPTURE_VAL2;
u32 DMX_MTBP,DMX_BEARK,DMX_MAB;   

void TIM5_IRQHandler(void)
{
  if(TIM_GetITStatus(TIM5,TIM_IT_CC1) != RESET)
  {

    if(TIM5CH1_CAPTURE_STA==0X00)
    {
     TIM_Cmd(TIM5,DISABLE );               
     TIM_SetCounter(TIM5,0);                  
     TIM_Cmd(TIM5,ENABLE );                  
     TIM_OC1PolarityConfig(TIM5,TIM_ICPolarity_Rising);     
     TIM5CH1_CAPTURE_STA=0x01;                 
    }
    else if(TIM5CH1_CAPTURE_STA==0X01)
    {
     TIM5CH1_CAPTURE_VAL1=TIM_GetCapture1(TIM5);      
     if(10000000>TIM5CH1_CAPTURE_VAL1>37)                 
     {
      DMX_BEARK=TIM5CH1_CAPTURE_VAL1;
      TIM_OC1PolarityConfig(TIM5,TIM_ICPolarity_Falling);     
      TIM5CH1_CAPTURE_STA=0x03;                 
     }else TIM5CH1_CAPTURE_STA=0;
     
    }
   
    else if(TIM5CH1_CAPTURE_STA==0X03)  
    {
     TIM5CH1_CAPTURE_VAL1=TIM_GetCapture1(TIM5);        
     if(10000000>TIM5CH1_CAPTURE_VAL2>7)                 
     {
      DMX_MAB=TIM5CH1_CAPTURE_VAL2-TIM5CH1_CAPTURE_VAL1;
      TIM5CH1_CAPTURE_STA=0x07;               
      TIM_OC1PolarityConfig(TIM5,TIM_ICPolarity_Falling);     
     }else TIM5CH1_CAPTURE_STA=0;
    }
   
   
    //Òç³ö´¦Àí**************************************************
    if(TIM_GetITStatus(TIM5, TIM_IT_Update) != RESET)
   {
    printf("ÐźÅÒç³ö");
   }
   
   
   //¸´Î»
   TIM5CH1_CAPTURE_STA=0;            
   TIM_ClearITPendingBit(TIM5, TIM_IT_CC1|TIM_IT_Update);
   }
}  

//主函数/////////////////////////////////////////////////////////////////////////////////////////////
main.c
#include "sys.h"
#include "delay.h"
#include "usart.h"
#include "led.h"
#include "lcd.h"
#include "timer.h"

#include  "stm32f4xx.h"

//****************************************************************************************************************//


         
//**********************Ö÷º¯Êý********************************//

int main(void)
{

My_USART2_Init();

NVIC_PriorityGroupConfig(NVIC_PriorityGroup_2);
delay_init(168);   
uart_init(115200);


LED_Init();      
  LCD_Init();         
POINT_COLOR=RED;   

LCD_ShowString(30,40,210,24,24,"Explorer STM32F4");

TIM5_CH1_Cap_Init(0xFFFFFFFF,84-1);                     

delay_ms(1000);
while(1)
{
  LED0=!LED0;  
  delay_ms(1000);
}  

}



在主函数中TIM5_CH1_Cap_Init(0xFFFFFFFF,84-1);   无法正常运行，只要一运行到这步程序就不再继续往下走了，已经纠结两天了，望解答！！！！！

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已解决

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进度已经卡在这好久了，求各位大神救援