lpc1768 adc 'done' bit never set's

#include "lpc17xx.h"
#include "gpio.h"

uint32_t m;

void main(){
  SystemInit();
  SystemCoreClockUpdate();

  while(1){
     init_adc(0);
     m=get_adc(0); 
  }
}

#include "gpio.h"
enumPending Int0_Stat(){
  return GPIOINT->P0Int;
}
enumPending Int2_Stat(){
  return GPIOINT->P2Int;
}

#ifndef __ADC_H_
#define __ADC_H_

#include "lpc17xx.h"
/*
typedef struct
{
  __IO uint32_t ADCR;
  __IO uint32_t ADGDR;
       uint32_t RESERVED0;
  __IO uint32_t ADINTEN;
  __I  uint32_t ADDR0;
  __I  uint32_t ADDR1;
  __I  uint32_t ADDR2;
  __I  uint32_t ADDR3;
  __I  uint32_t ADDR4;
  __I  uint32_t ADDR5;
  __I  uint32_t ADDR6;
  __I  uint32_t ADDR7;
  __I  uint32_t ADSTAT;
  __IO uint32_t ADTRM;
} LPC_ADC_TypeDef;
#define LPC_ADC               ((LPC_ADC_TypeDef       *) LPC_ADC_BASE      )
*/
typedef struct{
  union{
    struct{
      unsigned SEL:8;
      unsigned CLKDIV:8;
      unsigned BURST:1;
      unsigned :4;
      unsigned PDN:1;
      unsigned :2;
      unsigned START:3;
      unsigned EDGE:1;
    };
    uint32_t IADCR;
  };
}defADCR;
typedef struct{
  union{
    struct{
      unsigned :4;
      unsigned RESULT:12;
      unsigned :8;
      unsigned CHN:3;
      unsigned :3;
      unsigned OVERRUN:1;
      unsigned DONE:1;
    };
    unsigned IADGDR;
  };
}defADGDR;

typedef enum{
  no_start=0,
  now=1,
  p210=2,
  p127=3,
  mat01=4,
  mat03=5,
  mat10=6,
  mat11=7,
}enumstarter;
typedef enum{
  rising=0,
  falling=1,  
}enumedge;

typedef struct{
  union{
    struct{
      unsigned :4;
      unsigned RESULT:12;
      unsigned :14;
      unsigned OVERRUN:1;
      unsigned DONE:1;
    };
    uint32_t IADDR;
  };
}defADDR;
typedef struct{
  union{
    struct{
      unsigned INTEN0:1;
      unsigned INTEN1:1;
      unsigned INTEN2:1;
      unsigned INTEN3:1;
      unsigned INTEN4:1;
      unsigned INTEN5:1;
      unsigned INTEN6:1;
      unsigned INTEN7:1;
      unsigned ADGINTEN:1;
    };
    uint8_t ints;
    uint32_t IINT;
  };
}defINT;
#define ADCR ((defADCR *)&LPC_ADC->ADCR)
#define ADGDR ((defADGDR *)&LPC_ADC->ADGDR)
#define ADDR0 ((defADDR*)&LPC_ADC->ADDR0)
#define ADDR1 ((defADDR*)&LPC_ADC->ADDR1)
#define ADDR2 ((defADDR*)&LPC_ADC->ADDR2)
#define ADDR3 ((defADDR*)&LPC_ADC->ADDR3)
#define ADDR4 ((defADDR*)&LPC_ADC->ADDR4)
#define ADDR5 ((defADDR*)&LPC_ADC->ADDR5)
#define ADDR6 ((defADDR*)&LPC_ADC->ADDR6)
#define ADDR7 ((defADDR*)&LPC_ADC->ADDR7)
#define ADC_INT ((defINT*)&LPC_ADC->ADINTEN)

#endif