1. static void ADC_Config(void)
   
2. {
   
3.   ADC_InitTypeDef     ADC_InitStructure;
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4. 
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5. 
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6.   /* ADCs DeInit */  
   
7.   //ADC_DeInit(ADC1);
   
8. 
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9.   /* Initialize ADC structure */
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10.   ADC_StructInit(&ADC_InitStructure);
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11. 
    
12.   /* Configure the ADC1 in continuous mode with a resolution equal to 12 bits  */
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13.   ADC_InitStructure.ADC_Resolution = ADC_Resolution_12b;
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14.   ADC_InitStructure.ADC_ContinuousConvMode = ENABLE;
    
15.   ADC_InitStructure.ADC_ExternalTrigConvEdge = ADC_ExternalTrigConvEdge_None;
    
16.   ADC_InitStructure.ADC_DataAlign = ADC_DataAlign_Right;
    
17.   ADC_InitStructure.ADC_ScanDirection = ADC_ScanDirection_Upward;
    
18.   ADC_Init(ADC1, &ADC_InitStructure);
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19. 
    
20.   /* Convert the ADC1 Channel 9 with 239.5 Cycles as sampling time */  
    
21.   ADC_ChannelConfig(ADC1, ADC_Channel_9 , ADC_SampleTime_239_5Cycles);
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22.   /* ADC Calibration */
    
23.   ADC_GetCalibrationFactor(ADC1);
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24. 
    
25.   /* ADC DMA request in circular mode */
    
26.   //ADC_DMARequestModeConfig(ADC1, ADC_DMAMode_Circular);
    
27. 
    
28.   /* Enable ADC_DMA */
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29.   //ADC_DMACmd(ADC1, ENABLE);  
    
30. 
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31.   /* Enable the ADC peripheral */
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32.   ADC_Cmd(ADC1, ENABLE);     
    
33. 
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34.   /* Wait the ADRDY flag */
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35.   while(!ADC_GetFlagStatus(ADC1, ADC_FLAG_ADRDY));
    
36. 
    
37.   /* ADC1 regular Software Start Conv */
    
38.   ADC_StartOfConversion(ADC1);
    
39. 
    
40. }
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41. 
    
42. while(!ADC_GetFlagStatus(ADC1, ADC_FLAG_EOC ));//等待转换结束
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43.       _adc=ADC_GetConversionValue(ADC1);

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