STM32F4 Discovery ADC continuous conversion single channel

#include "stm32f4xx.h"
#include "stm32f4xx_rcc.h"
#include "stm32f4xx_gpio.h"
#include "stm32f4xx_adc.h"

//#include "GPIO_STM32F4xx.h"


ADC_InitTypeDef       ADC_InitStructure;
ADC_CommonInitTypeDef ADC_CommonInitStructure;
//DMA_InitTypeDef       DMA_InitStructure;
GPIO_InitTypeDef      GPIO_InitStructure;

uint16_t ADCLect=0;
uint16_t Counter=0;
uint16_t Done=0;

volatile uint32_t msTicks;                      /* counts 1ms timeTicks       */
FlagStatus Estado;
/*----------------------------------------------------------------------------
  SysTick_Handler
 *----------------------------------------------------------------------------*/
void SysTick_Handler(void) {
  msTicks++;
}
/*----------------------------------------------------------------------------
  delays number of tick Systicks (happens every 1 ms)
 *----------------------------------------------------------------------------*/
void Delay (uint32_t dlyTicks) {
  uint32_t curTicks;

  curTicks = msTicks;
  while ((msTicks - curTicks) < dlyTicks);
}

int main()
        {

                SystemCoreClockUpdate();

                if (SysTick_Config(SystemCoreClock / 1000)) { /* SysTick 1 msec interrupts  */
                        while (1);                                  /* Capture error              */
                }

                RCC_AHB1PeriphClockCmd(RCC_AHB1Periph_GPIOA, ENABLE);
                RCC_APB2PeriphClockCmd(RCC_APB2Periph_ADC1, ENABLE);

                /* Configure PA1 in analog mode */

                GPIO_InitStructure.GPIO_Pin = GPIO_Pin_1;
                GPIO_InitStructure.GPIO_Mode = GPIO_Mode_AN;
                GPIO_InitStructure.GPIO_PuPd = GPIO_PuPd_NOPULL ;
                GPIO_Init(GPIOA, &GPIO_InitStructure);

                /* ADC Common configuration *************************************************/
                ADC_CommonInitStructure.ADC_Mode = ADC_Mode_Independent;
                ADC_CommonInitStructure.ADC_TwoSamplingDelay = ADC_TwoSamplingDelay_5Cycles;
                ADC_CommonInitStructure.ADC_DMAAccessMode = ADC_DMAAccessMode_Disabled;
                ADC_CommonInitStructure.ADC_Prescaler = ADC_Prescaler_Div2;
                ADC_CommonInit(&ADC_CommonInitStructure);

                /* ADC1 regular channel 12 configuration ************************************/
                ADC_InitStructure.ADC_Resolution = ADC_Resolution_12b;
                ADC_InitStructure.ADC_ScanConvMode = DISABLE;
                ADC_InitStructure.ADC_ContinuousConvMode = ENABLE;//ENABLE;//DISABLE;
                ADC_InitStructure.ADC_ExternalTrigConvEdge = ADC_ExternalTrigConvEdge_None;
                ADC_InitStructure.ADC_DataAlign = ADC_DataAlign_Right;
                ADC_InitStructure.ADC_NbrOfConversion = 1;
                ADC_Init(ADC1, &ADC_InitStructure);

                ADC_EOCOnEachRegularChannelCmd(ADC1,ENABLE);

                ADC_RegularChannelConfig(ADC1, ADC_Channel_1, 1, ADC_SampleTime_3Cycles);
                ADC_ContinuousModeCmd(ADC1,ENABLE); // to make sure the CONT is set
                /* Enable ADC1 **************************************************************/
                ADC_Cmd(ADC1, ENABLE);
                ADC_SoftwareStartConv(ADC1);
                while (1)
                {
                        //ADC_SoftwareStartConv(ADC1);
                        Estado = ADC_GetFlagStatus(ADC1,ADC_FLAG_EOC);
                        if(Estado){
                                Done=1;
                                ADCLect = ADC_GetConversionValue(ADC1);
                                //ADC_ClearFlag(ADC1,ADC_FLAG_EOC); // to clear the flags events.
                        }
                        Delay(100);
                }
                return 0;

}

        ADC_SoftwareStartConv(ADC1);
        ADCLect = ADC_GetConversionValue(ADC1);
        ADC_ClearFlag(ADC1,ADC_FLAG_EOC);