adc多通道采集DMA模式高位数据丢失

graycker

采集的数据只有低8位，而且DMA传到内存的数据像是被压缩过的，高位的全没有，有谁遇到过没？

初始化程序如下：

//----------------------------- 外围时钟配置 ---------------------------------   
void RCCConf(void)
{
  // HSE:8M; SYSCLK:72M; AHB(HCLK):72M; APB2(PCLK2):72M; ADCLK:?
  // 前面的都为默认配置，需要调整就从新设置
  RCC_ADCCLKConfig(RCC_PCLK2_Div6);
 
  RCC_AHBPeriphClockCmd(RCC_AHBPeriph_DMA1, ENABLE);
  RCC_APB1PeriphClockCmd(RCC_APB1Periph_TIM2 | RCC_APB1Periph_TIM3, ENABLE);
  RCC_APB2PeriphClockCmd(RCC_APB2Periph_GPIOA | RCC_APB2Periph_GPIOB | RCC_APB2Periph_GPIOC |
                         RCC_APB2Periph_AFIO | RCC_APB2Periph_ADC1, ENABLE);  // RCC_APB2Periph_ADC2
}

#define ADC1_DR_Address    ((uint32_t)0x4001244C)
//----------------------------- DMA通道配置 ---------------------------------
void DMAConf(void)
{
  DMA_InitTypeDef DMA_InitStructure;
 
  DMA_DeInit(DMA1_Channel1);
  DMA_InitStructure.DMA_PeripheralBaseAddr = ADC1_DR_Address;
  DMA_InitStructure.DMA_MemoryBaseAddr = (uint32_t)adcvalue;
  DMA_InitStructure.DMA_DIR = DMA_DIR_PeripheralSRC;
  DMA_InitStructure.DMA_BufferSize = 8; //
  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_PeripheralDataSize_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_ITConfig(DMA1_Channel1, DMA_IT_TC, ENABLE);       //
  // 如果在初始化AD的时候DMA被触发了一次，但是此时并没有采样，但是DMA目的地址已经发生了自加，
  DMA_Cmd(DMA1_Channel1, ENABLE);
}

// 规则序列寄存器
//----------------------------- ADC模式配置 ---------------------------------
void ADCConf(void)
{
  ADC_InitTypeDef  ADC_InitStructure;
 
  // ADC1 configuration ------------------------------------------------------
  ADC_DeInit(ADC1);
  ADC_InitStructure.ADC_Mode = ADC_Mode_Independent; 
  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 = 2;     
  ADC_Init(ADC1, &ADC_InitStructure);              
  ADC_RegularChannelConfig(ADC1, ADC_Channel_0, 1, ADC_SampleTime_1Cycles5 );
  ADC_RegularChannelConfig(ADC1, ADC_Channel_1, 2, ADC_SampleTime_1Cycles5 );   
  ADC_DMACmd(ADC1, ENABLE);

  ADC_Cmd(ADC1, ENABLE);                                //使能指定的ADC1
  ADC_ResetCalibration(ADC1);                           //复位指定的ADC1的校准寄存器
  while(ADC_GetResetCalibrationStatus(ADC1));           //获取ADC1复位校准寄存器的状态,设置状态则等待
  ADC_StartCalibration(ADC1);                           //开始指定ADC1的校准状态
  while(ADC_GetCalibrationStatus(ADC1));                //获取指定ADC1的校准程序,设置状态则等待 

   ADC_SoftwareStartConvCmd(ADC1, ENABLE); 
}

// 中断是后来用上的，结果的数据都一样

NVIC_PriorityGroupConfig(NVIC_PriorityGroup_0);
  NVIC_InitStructure.NVIC_IRQChannel  = DMA1_Channel1_IRQn;
  NVIC_InitStructure.NVIC_IRQChannelSubPriority   = 0;
  NVIC_InitStructure.NVIC_IRQChannelCmd   = ENABLE;
  NVIC_Init(&NVIC_InitStructure);GPIO_InitStructure.GPIO_Pin = GPIO_Pin_0|GPIO_Pin_1|GPIO_Pin_2|GPIO_Pin_3|GPIO_Pin_4|GPIO_Pin_5|GPIO_Pin_6|GPIO_Pin_7;
  GPIO_InitStructure.GPIO_Mode = GPIO_Mode_AIN;
  GPIO_Init(GPIOA, &GPIO_InitStructure);  

正点原子

帮顶。。。。