hbe-mcu-muit2에 달려있는 센서를 가지고 모듈의 출력 전압이 변화되는 것을 ADC를 통해 읽어 내고 이를 통하여 센서 앞에 위치
한 물체까지의 거리를 측정하는 코드인데 if를 써야될지 while을 써야되는지 모르겠습니다.. 
 
이렇게 하면 시그먼트는 뜨기 하는데 0000에서 계속 깜박입니다 항상 답변감사합니다 많은 공부가 되고있습니다
// stm32f4xx의 각 레지스터들을 정의한 헤더 파일
#include "stm32f4xx.h"
 
// delay 함수
static void Delay(const uint32_t Count)
{
__IO uint32_t index = 0;
for(index = (16800* Count); index !=0; index--);
}
 
unsigned char Font[18] = {0x3F, 0X06, 0X5B, 0X4F,
                                         0X66, 0X6D, 0X7C, 0X07,
                                         0X7F, 0X67, 0X77, 0X7C,
                                         0X39, 0X5E, 0X79, 0X71,
                                         0X08, 0X80};
uint16_t adc_data;                         
 
void Segment( int N )
{
int i;
unsigned char N1000, N100, N10, N1 ;
int Buff;
 
N1000 = N / 1000;
Buff = N %1000;
N100 = Buff / 100;
Buff = Buff %100;
N10= Buff/10;
N1 = Buff%10;
 
for( i =0 ; i <30; i++)
{
GPIO_Write(GPIOC, Font[N1000]|0x0e00);
Delay(1);
GPIO_Write(GPIOC, Font[N100]|0x0d00);
Delay(1);
GPIO_Write(GPIOC, Font[N10]|0x0b00);
Delay(1);
GPIO_Write(GPIOC, Font[N1]|0x0700);
Delay(1);
  }
}
 
 
void ADC_IRQHandler(void)
{
  if(ADC_GetITStatus(ADC1, ADC_IT_EOC) != RESET)
  {
    ADC_ClearITPendingBit(ADC1, ADC_IT_EOC);
    adc_data = ADC_GetConversionValue(ADC1);
  }
;}
    
    
int main()
{
  GPIO_InitTypeDef   GPIO_InitStructure;
  ADC_InitTypeDef   ADC_InitStructure;
  ADC_CommonInitTypeDef ADC_CommonInitStructure;
  NVIC_InitTypeDef  NVIC_InitStructure;
  int Dist = 0;
 
  RCC_AHB1PeriphClockCmd(RCC_AHB1Periph_GPIOC|RCC_AHB1Periph_GPIOA, ENABLE);
  RCC_APB2PeriphClockCmd(RCC_APB2Periph_ADC1, ENABLE);
  
  GPIO_InitStructure.GPIO_Mode = GPIO_Mode_OUT;
  GPIO_InitStructure.GPIO_OType = GPIO_OType_PP;
  GPIO_InitStructure.GPIO_Speed = GPIO_Speed_100MHz;
  GPIO_InitStructure.GPIO_PuPd = GPIO_PuPd_NOPULL;
  
  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_Pin_11;
  GPIO_Init(GPIOC, &GPIO_InitStructure);
  
  GPIO_InitStructure.GPIO_Pin = GPIO_Pin_0;
  GPIO_InitStructure.GPIO_Mode = GPIO_Mode_AN;
  GPIO_Init(GPIOA, &GPIO_InitStructure);
  
  NVIC_PriorityGroupConfig(NVIC_PriorityGroup_2);
  
  NVIC_InitStructure.NVIC_IRQChannel = ADC_IRQn;
  NVIC_InitStructure.NVIC_IRQChannelPreemptionPriority = 0x01;
  NVIC_InitStructure.NVIC_IRQChannelSubPriority = 0x01;
  NVIC_InitStructure.NVIC_IRQChannelCmd = ENABLE;
  NVIC_Init(&NVIC_InitStructure);
 
  ADC_CommonInitStructure.ADC_Mode = ADC_Mode_Independent;
  ADC_CommonInitStructure.ADC_Prescaler = ADC_Prescaler_Div2;
  ADC_CommonInitStructure.ADC_DMAAccessMode = ADC_DMAAccessMode_Disabled;
  ADC_CommonInitStructure.ADC_TwoSamplingDelay = ADC_TwoSamplingDelay_5Cycles;
  ADC_CommonInit(&ADC_CommonInitStructure);
  
 ADC_InitStructure.ADC_Resolution = ADC_Resolution_12b;
 ADC_InitStructure.ADC_ScanConvMode = DISABLE;
 ADC_InitStructure.ADC_ContinuousConvMode =  ENABLE;
 ADC_InitStructure.ADC_ExternalTrigConvEdge = ADC_ExternalTrigConvEdge_None;
 ADC_InitStructure.ADC_ExternalTrigConv = ADC_ExternalTrigConv_T1_CC1;
 ADC_InitStructure.ADC_DataAlign = ADC_DataAlign_Right;
 ADC_InitStructure.ADC_NbrOfConversion = 1;
 ADC_Init(ADC1, &ADC_InitStructure);
 
 ADC_RegularChannelConfig(ADC1, ADC_Channel_0, 1, ADC_SampleTime_3Cycles);
 ADC_ITConfig(ADC1, ADC_IT_EOC, ENABLE);
 ADC_Cmd(ADC1, ENABLE);
 ADC_SoftwareStartConv(ADC1);
  
  
  while(1)
   {
     
  
  Segment(Dist);
    }
}