以下如代码，采集四路ADC，但现在第二路上电总会有1V左右电压，再添加几路同样莫名的有电压，不知道为什么。有人知道吗？
#include "adc.h"
__IO uint16_t ADCConvertedValue[4]={0};
#define ADC1_DR_Address    ((uint32_t)0x4001244C)  void ADC_Config(void)
{
  ADC_InitTypeDef     ADC_InitStructure;
  GPIO_InitTypeDef    GPIO_InitStructure;
  DMA_InitTypeDef     DMA_InitStructure;
 
  /* ADCCLK = PCLK2/4 */
  //RCC_ADCCLKConfig(RCC_PCLK2_Div4);
  RCC_ADCCLKConfig(RCC_PCLK2_Div6); 
  /* GPIOB Periph clock enable */
  RCC_AHBPeriphClockCmd(RCC_AHBPeriph_GPIOA, ENABLE);
 
  /* Configure ADC Channel9 as analog input */
  GPIO_InitStructure.GPIO_Pin = GPIO_Pin_0|GPIO_Pin_1|GPIO_Pin_4|GPIO_Pin_5;
  GPIO_InitStructure.GPIO_Mode = GPIO_Mode_AN;
  GPIO_InitStructure.GPIO_PuPd = GPIO_PuPd_NOPULL;
  GPIO_Init(GPIOA, &GPIO_InitStructure);
 
  /* DMA1 clock enable */
  RCC_AHBPeriphClockCmd(RCC_AHBPeriph_DMA1 , ENABLE);
 
  /* DMA1 Channel1 Config */
  DMA_DeInit(DMA1_Channel1);
  DMA_InitStructure.DMA_PeripheralBaseAddr = (uint32_t)ADC1_DR_Address;
  DMA_InitStructure.DMA_MemoryBaseAddr = (uint32_t)ADCConvertedValue;
  DMA_InitStructure.DMA_DIR = DMA_DIR_PeripheralSRC;
  DMA_InitStructure.DMA_BufferSize = 4;
  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);
  /* DMA1 Channel1 enable */
  DMA_Cmd(DMA1_Channel1, ENABLE);
 
  /* ADC1 Periph clock enable */
  RCC_APB2PeriphClockCmd(RCC_APB2Periph_ADC1, ENABLE);
 
  /* ADC1 DeInit */ 
  ADC_DeInit(ADC1);
 
  /* Enable ADC_DMA */
  ADC_DMACmd(ADC1, ENABLE); 
 
  /* Initialize ADC structure */
  ADC_StructInit(&ADC_InitStructure);
 
  /* Configure the ADC1 in continuous mode */
  ADC_InitStructure.ADC_ScanConvMode = ENABLE;
  ADC_InitStructure.ADC_ContinuousConvMode = ENABLE;
  ADC_InitStructure.ADC_ExternalTrigConv = ADC_ExternalTrigConv_None;
  ADC_InitStructure.ADC_DataAlign = ADC_DataAlign_Right;
  ADC_InitStructure.ADC_NbrOfChannel = 4;
  ADC_Init(ADC1, &ADC_InitStructure);
 
  /* Convert the ADC1 Channel 9 with 55.5 Cycles as sampling time */
  ADC_RegularChannelConfig(ADC1, ADC_Channel_0, 1, ADC_SampleTime_239Cycles5);
 
  /* Convert the ADC1 temperature sensor  with 55.5 Cycles as sampling time */
  ADC_RegularChannelConfig(ADC1, ADC_Channel_1 ,2, ADC_SampleTime_239Cycles5); 
 
  /* Convert the ADC1 Vref  with 55.5 Cycles as sampling time */
  ADC_RegularChannelConfig(ADC1, ADC_Channel_4 , 3, ADC_SampleTime_239Cycles5);
   
  /* Convert the ADC1 Vbat with 239.5 Cycles as sampling time */
  ADC_RegularChannelConfig(ADC1, ADC_Channel_5 ,4, ADC_SampleTime_239Cycles5); 
 
 
  /* Enable ADC1 */
  ADC_Cmd(ADC1, ENABLE); 
 
  /* ADC1 reset calibration register */  
  ADC_ResetCalibration(ADC1);
 
  while(ADC_GetResetCalibrationStatus(ADC1));
 
  /* ADC1 calibration start */
  ADC_StartCalibration(ADC1);
 
  while(ADC_GetCalibrationStatus(ADC1));
 
  /* Enable ADC1 */
  ADC_Cmd(ADC1, ENABLE);
}