原创 STM32多通道ADC规则转换实现了!

比画了很多天,终于今天下狠心把多通道ADC转换逼出来了,一直就看着ADC多通道的多种用法和DMA的用法眼晕,找了很多例子最多是3通道而且用的不是一个AD.终于靠自己的力量弄出来了,长出了一口气啊.我这里用的ADC的通道8~15共8个通道,采用自动连续转换模式,转换完一个通道的数据由DMA送到内存中,主程序中把每个通道的数据分检出来经过"去极值取平均值滤波"后送给LCD显示,在万利的开发板上显示的值比万利的例子稳定多了.

/*******************************************************************************
* 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 ----------------------------------------------*/
  DMA_DeInit(DMA1_Channel1);
  DMA_InitStructure.DMA_PeripheralBaseAddr = ADC1_DR_Address;//外设地址
  DMA_InitStructure.DMA_MemoryBaseAddr = (u32)ADC_RCVTab;//内存地址
  DMA_InitStructure.DMA_DIR = DMA_DIR_PeripheralSRC;//dma传输方向单向
  DMA_InitStructure.DMA_BufferSize = 160;//设置DMA在传输时缓冲区的长度 word
  DMA_InitStructure.DMA_PeripheralInc = DMA_PeripheralInc_Disable;//设置DMA的外设递增模式，一个外设
  DMA_InitStructure.DMA_MemoryInc = DMA_MemoryInc_Enable;//设置DMA的内存递增模式，
  DMA_InitStructure.DMA_PeripheralDataSize = DMA_PeripheralDataSize_HalfWord;//外设数据字长
  DMA_InitStructure.DMA_MemoryDataSize = DMA_MemoryDataSize_HalfWord;//内存数据字长
  DMA_InitStructure.DMA_Mode = DMA_Mode_Circular;//设置DMA的传输模式：连续不断的循环模式
  DMA_InitStructure.DMA_Priority = DMA_Priority_High;//设置DMA的优先级别
  DMA_InitStructure.DMA_M2M = DMA_M2M_Disable;//设置DMA的2个memory中的变量互相访问
  DMA_Init(DMA1_Channel1, &DMA_InitStructure);
 
  /* Enable DMA1 channel1 */
  DMA_Cmd(DMA1_Channel1, ENABLE);

  /* ADC1 configuration ------------------------------------------------------*/
  ADC_InitStructure.ADC_Mode = ADC_Mode_Independent;//独立工作模式
  ADC_InitStructure.ADC_ScanConvMode = ENABLE;//扫描方式
  ADC_InitStructure.ADC_ContinuousConvMode = ENABLE;//连续转换
  ADC_InitStructure.ADC_ExternalTrigConv = ADC_ExternalTrigConv_None;//外部触发禁止
  ADC_InitStructure.ADC_DataAlign = ADC_DataAlign_Right;//数据右对齐
  ADC_InitStructure.ADC_NbrOfChannel = 8;//用于转换的通道数
  ADC_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(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();
  }
}