STM32 multi-channel ADC rule conversion is realized

/*******************************************************************************
* Function Name  : main
* Description    : Main program
* Input          : None
* Output         : None
* Return         : None
*******************************************************************************/
int main(void)
{
#ifdef DEBUG
  debug();
#endif

  /* System clocks configuration ---------------------------------------------*/
  RCC_Configuration();

  /* NVIC configuration ------------------------------------------------------*/
  NVIC_Configuration();

  /* GPIO configuration ------------------------------------------------------*/
  GPIO_Configuration();

  LcdShow_Init();

  /* DMA1 channel1 configuration ----------------------------------------------*/

  RCC_AHBPeriphClockCmd(RCC_AHBPeriph_DMA1, ENABLE); //Enable DMA clock

  DMA_DeInit(DMA1_Channel1);
  DMA_InitStructure.DMA_PeripheralBaseAddr = ADC1_DR_Address;//Peripheral address
  DMA_InitStructure.DMA_MemoryBaseAddr = (u32)ADC_RCVTab;//Memory address
  DMA_InitStructure.DMA_DIR = DMA_DIR_PeripheralSRC;//dma transmission direction unidirectional
  DMA_InitStructure.DMA_BufferSize = 160;//Set the length of the DMA buffer during transmission word
  DMA_InitStructure.DMA_PeripheralInc = DMA_PeripheralInc_Disable;//Set the peripheral increment mode of DMA, one peripheral
  DMA_InitStructure.DMA_MemoryInc = DMA_MemoryInc_Enable;//Set the memory increment mode of DMA,
  DMA_InitStructure.DMA_PeripheralDataSize = DMA_PeripheralDataSize_HalfWord;//Peripheral data word
  lengthDMA_InitStructure.DMA_MemoryDataSize = DMA_MemoryDataSize_HalfWord;//Memory data word
  lengthDMA_InitStructure.DMA_Mode = DMA_Mode_Circular;//Set DMA transfer mode: continuous circular modeDMA_InitStructure.DMA_Priority
  = DMA_Priority_High;//Set DMA priority levelDMA_InitStructure.DMA_M2M
  = DMA_M2M_Disable;//Set variables in 2 DMA memories to access each otherDMA_Init
  (DMA1_Channel1, &DMA_InitStructure);
  
  /* Enable DMA1 channel1 */
  DMA_Cmd(DMA1_Channel1, ENABLE);

  /* ADC1 configuration ------------------------------------------------------*/
  ADC_InitStructure.ADC_Mode = ADC_Mode_Independent;//Independent working modeADC_InitStructure.ADC_ScanConvMode
  = ENABLE;//Scan modeADC_InitStructure.ADC_ContinuousConvMode = ENABLE
  ;//Continuous conversionADC_InitStructure.ADC_ExternalTrigConv
  = ADC_ExternalTrigConv_None;//External trigger disabledADC_InitStructure.ADC_DataAlign
  = ADC_DataAlign_Right;//Data right
  alignmentADC_InitStructure.ADC_NbrOfChannel = 8;//Number of channels used for conversionADC_Init
  (ADC1, &ADC_InitStructure);

  /* ADC1 regular channels configuration [规则模式通道配置]*/ 
  ADC_RegularChannelConfig(ADC1, ADC_Channel_8 , 1, ADC_SampleTime_239Cycles5);
  ADC_RegularChannelConfig(ADC1, ADC_Channel_9 , 2, ADC_SampleTime_239Cycles5);
  ADC_RegularChannelConfig(ADC1, ADC_Channel_10, 3, ADC_SampleTime_239Cycles5);
  ADC_RegularChannelConfig(ADC1, ADC_Channel_11, 4, ADC_SampleTime_239Cycles5);  
  ADC_RegularChannelConfig(ADC1, ADC_Channel_12, 5, ADC_SampleTime_239Cycles5);
  ADC_RegularChannelConfig(ADC1, ADC_Channel_13, 6, ADC_SampleTime_239Cycles5);
  ADC_RegularChannelConfig(ADC1, ADC_Channel_14, 7, ADC_SampleTime_239Cycles5);
  ADC_RegularChannelConfig(ADC1, ADC_Channel_15, 8, ADC_SampleTime_239Cycles5); 

  /* Enable ADC1 DMA [使能ADC1 DMA]*/
  ADC_DMACmd(ADC1, ENABLE);
  
  /* Enable ADC1 [使能ADC1]*/
  ADC_Cmd(ADC1, ENABLE); 

  /* Enable ADC1 reset calibaration register */   
  ADC_ResetCalibration(ADC1);
  /* Check the end of ADC1 reset calibration register */
  while(ADC_GetResetCalibrationStatus(ADC1));

  /* Start ADC1 calibaration */
  ADC_StartCalibration(ADC1);
  /* Check the end of ADC1 calibration */
  while(ADC_GetCalibrationStatus(ADC1));
  
  /* Start ADC1 Software Conversion */
  ADC_SoftwareStartConvCmd(ADC1, ENABLE);

  while(RESET==DMA_GetFlagStatus(DMA1_FLAG_TC1));   //自己添加
  
    while(1)
  {
    vu16 value1 = 0;
    vu16 value2 = 0; 
    vu16 value3 = 0;
    vu16 value4 = 0;
    vu16 value5 = 0; 
    vu16 value6 = 0; 
    vu16 value7 = 0; 
    vu16 value8 = 0;
 value1 = average(ADC_RCVTab,0);
 value2 = average(ADC_RCVTab,1); 
 value3 = average(ADC_RCVTab,2);
 value4 = average(ADC_RCVTab,3);
 value5 = average(ADC_RCVTab,4);
 value6 = average(ADC_RCVTab,5); 
 value7 = average(ADC_RCVTab,6);
 value8 = average(ADC_RCVTab,7); 
 
    u8 num1 = value3 % 10;
    u8 num2 = (value3 / 10) % 10;
    u8 num3= (value3 / 100) % 10;
    u8 num4 = value3 / 1000;
    if (num1 > 9)
      display[3] = num1 + (65 - 10);
    else
      display[3] = num1 + (48-0);

    if (num2 > 9)
      display[2] = num2 +(65 - 10);
    else
      display[2] = num2 + (48 - 0);

    if (num3>9)
      display[1]=num3+(65-10);
    else
      display[1]=num3+(48-0);

    if (num4>9)
      display[0]=num4+(65-10);
    else
      display[0]=num4+(48-0);

    write_string(display);
    delay();
  }
}

u16 average(vu16 ADCDataTab[], u16 nChannel) //Add by yourself
{ 
   u16 averagevalue=0, maxvalue=0, minvalue=0xFFFF, i;

   for (i=0;i<20;i++) 
   { 
     averagevalue += *(ADCDataTab+nChannel+i*8);

  if(*(ADCDataTab+nChannel+i*8)>maxvalue)   
  maxvalue=*(ADCDataTab+nChannel+i*8);
    
  if(*(ADCDataTab+nChannel+i*8)   minvalue=*(ADCDataTab+nChannel+i*8);
 }

 return ((averagevalue-maxvalue-minvalue)/18); //This will take time and is not advisable. It is best to use >>
 
}