ADC (STM32f091RC)

#include <stdio.h>

#include "diag/Trace.h"

#include "stm32f0xx.h"

#include "stm32f0xx_conf.h"

int main(int argc, char* argv[])

{

    //(#) ADC pins (pA1) configuration  --------------------------------------------------------------

  GPIO_InitTypeDef GPIO_InitStructure;

    RCC_AHBPeriphClockCmd(RCC_AHBPeriph_GPIOA, ENABLE);

    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);

//leds (pB0... pB3) configuration--------------------------------------------------------------

    GPIO_InitTypeDef  GPIO_LEDs;

            RCC_AHBPeriphClockCmd(RCC_AHBPeriph_GPIOB, ENABLE); 

            GPIO_LEDs.GPIO_Pin = GPIO_Pin_0 |GPIO_Pin_1|GPIO_Pin_2|GPIO_Pin_3;

            GPIO_LEDs.GPIO_Mode = GPIO_Mode_OUT;

            GPIO_LEDs.GPIO_OType = GPIO_OType_PP;

            GPIO_LEDs.GPIO_Speed = GPIO_Speed_50MHz;

            GPIO_LEDs.GPIO_PuPd = GPIO_PuPd_NOPULL;

            GPIO_Init(GPIOB, &GPIO_LEDs);

//ADC-------------------------------------------------------------------------------------------

    ADC_InitTypeDef  ADC_InitStructure;

    RCC_APB2PeriphClockCmd(RCC_APB2Periph_ADC1, ENABLE);

    ADC_InitStructure.ADC_Resolution = ADC_Resolution_12b;

    ADC_InitStructure.ADC_ContinuousConvMode = ENABLE;

    ADC_InitStructure.ADC_ExternalTrigConvEdge = ADC_ExternalTrigConvEdge_None;

    ADC_InitStructure.ADC_DataAlign = ADC_DataAlign_Right;

    ADC_InitStructure.ADC_ScanDirection = ADC_ScanDirection_Upward;

    ADC_Init(ADC1, &ADC_InitStructure);

    ADC_GetCalibrationFactor(ADC1);

      ADC_Cmd(ADC1, ENABLE);

      while(ADC_GetFlagStatus(ADC1, ADC_FLAG_ADEN) == RESET);

      ADC_StartOfConversion(ADC1);

    uint16_t valueADC = ADC_GetConversionValue(ADC1);

    ADC_ChannelConfig(ADC1, ADC_Channel_1, ADC_SampleTime_1_5Cycles);

    //dma--------------------------------------------------------------------------------------

    DMA_InitTypeDef DMA_InitStructure;

    RCC_AHBPeriphClockCmd(RCC_AHBPeriph_DMA1 , ENABLE);

    DMA_DeInit(DMA1_Channel1);

    DMA_InitStructure.DMA_PeripheralBaseAddr= (uint32_t)&ADC1->DR;

    DMA_InitStructure.DMA_MemoryBaseAddr=(uint32_t)&valueADC;

    DMA_InitStructure.DMA_DIR = DMA_DIR_PeripheralSRC;

    DMA_InitStructure.DMA_BufferSize = 2;

    DMA_InitStructure.DMA_PeripheralInc = DMA_PeripheralInc_Disable;

    DMA_InitStructure.DMA_MemoryInc = DMA_MemoryInc_Enable;

    DMA_InitStructure.DMA_PeripheralDataSize = DMA_PeripheralDataSize_HalfWord;

    DMA_InitStructure.DMA_MemoryDataSize = DMA_MemoryDataSize_HalfWord;

    DMA_InitStructure.DMA_Mode = DMA_Mode_Circular;

    DMA_InitStructure.DMA_Priority = DMA_Priority_High;

    DMA_InitStructure.DMA_M2M = DMA_M2M_Disable;

    DMA_Init(DMA1_Channel1, &DMA_InitStructure);

         DMA_Cmd(DMA1_Channel1, ENABLE);

      ADC_DMARequestModeConfig(ADC1, ADC_DMAMode_Circular);

      ADC_DMACmd(ADC1, ENABLE);

      while(!ADC_GetFlagStatus(ADC1, ADC_FLAG_EOC));//Processing the conversion

     return ADC_GetConversionValue(ADC1); //Return the converted data

      ADC_StartOfConversion(ADC1);

  while (1)

    if(valueADC<2000){

    GPIO_SetBits(GPIOB, GPIO_Pin_0);

    }

    else if(valueADC>2000){

      GPIO_SetBits(GPIOB, GPIO_Pin_1);

          }

}