本帖最后由 chengying 于 2019-1-16 18:12 编辑

stm32f030rc的ad采样，用标准1.5库，标准历程，烧写到板子上，Pa.0测出电压差0.5V左右，摇摆不定，确定硬件没问题，同样的板子换103测试ad正常。有人在用吗，帮忙测试一下这个我测试的工程是否有问题。

static void ADC_Config(void)
{
  ADC_InitTypeDef     ADC_InitStructure;
  GPIO_InitTypeDef    GPIO_InitStructure;
  /* ADC1 DeInit */  
  ADC_DeInit(ADC1);
  
  /* GPIOC Periph clock enable */
  RCC_AHBPeriphClockCmd(RCC_AHBPeriph_GPIOA, ENABLE);
  
   /* ADC1 Periph clock enable */
  RCC_APB2PeriphClockCmd(RCC_APB2Periph_ADC1, ENABLE);
  
  /* Configure ADC Channel11 and channel10 as analog input */

  GPIO_InitStructure.GPIO_Pin = GPIO_Pin_0 ;

  GPIO_InitStructure.GPIO_Mode = GPIO_Mode_AN;
  GPIO_InitStructure.GPIO_PuPd = GPIO_PuPd_NOPULL ;
  GPIO_Init(GPIOA, &GPIO_InitStructure);
  
  /* Initialize ADC structure */
  ADC_StructInit(&ADC_InitStructure);
  
  /* Configure the ADC1 in continuous mode withe a resolution equal to 12 bits  */
  ADC_InitStructure.ADC_Resolution = ADC_Resolution_12b;
  ADC_InitStructure.ADC_ContinuousConvMode = ENABLE;
  ADC_InitStructure.ADC_ExternalTrigConvEdge = ADC_ExternalTrigConvEdge_None;
  ADC_InitStructure.ADC_DataAlign = ADC_DataAlign_Right;
  ADC_InitStructure.ADC_ScanDirection = ADC_ScanDirection_Upward ;
  ADC_Init(ADC1, &ADC_InitStructure);


  ADC_ChannelConfig(ADC1, ADC_Channel_10 , ADC_SampleTime_55_5Cycles);

  
  /* Convert the ADC1 temperature sensor  with 55.5 Cycles as sampling time */
  ADC_ChannelConfig(ADC1, ADC_Channel_TempSensor , ADC_SampleTime_55_5Cycles);  
  ADC_TempSensorCmd(ENABLE);
  
  /* Convert the ADC1 Vref  with 55.5 Cycles as sampling time */
  ADC_ChannelConfig(ADC1, ADC_Channel_Vrefint , ADC_SampleTime_55_5Cycles);
  ADC_VrefintCmd(ENABLE);
  
  /* Convert the ADC1 Vbat with 55.5 Cycles as sampling time */
  ADC_ChannelConfig(ADC1, ADC_Channel_Vbat , ADC_SampleTime_55_5Cycles);  
  ADC_VbatCmd(ENABLE);
  
  /* ADC Calibration */
  ADC_GetCalibrationFactor(ADC1);
  
  /* ADC DMA request in circular mode */
  ADC_DMARequestModeConfig(ADC1, ADC_DMAMode_Circular);
  
  /* Enable ADC_DMA */
  ADC_DMACmd(ADC1, ENABLE);  
  
  /* Enable the ADC peripheral */
  ADC_Cmd(ADC1, ENABLE);     
  
  /* Wait the ADRDY flag */
  while(!ADC_GetFlagStatus(ADC1, ADC_FLAG_ADRDY));
  
  /* ADC1 regular Software Start Conv */
  ADC_StartOfConversion(ADC1);
}

/**
  * @brief  DMA channel1 configuration
  * @param  None
  * @retval None
  */
static void DMA_Config(void)
{
  DMA_InitTypeDef   DMA_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)RegularConvData_Tab;
  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);
  
}
#define ADC1_DR_Address    0x40012440

/* Private macro -------------------------------------------------------------*/
/* Private variables ---------------------------------------------------------*/
__IO uint16_t  ADC1ConvertedValue = 0, ADC1ConvertedVoltage = 0;
__IO uint16_t RegularConvData_Tab[4];

/* Private function prototypes -----------------------------------------------*/
/* Private functions ---------------------------------------------------------*/

static void ADC_Config(void);
static void DMA_Config(void);


/**
  * @brief  Main program.
  * @param  None
  * @retval None
  */
int main(void)
{
  /*!< At this stage the microcontroller clock setting is already configured,
       this is done through SystemInit() function which is called from startup
       file (startup_stm32f0xx.s) before to branch to application main.
       To reconfigure the default setting of SystemInit() function, refer to
       system_stm32f0xx.c file
     */

   
  /* ADC1 configuration */
  ADC_Config();
  
  /* DMA configuration */
  DMA_Config();

  /* Infinite loop */
  while (1)
  {
    /* Test DMA1 TC flag */
    while((DMA_GetFlagStatus(DMA1_FLAG_TC1)) == RESET );
   
    /* Clear DMA TC flag */
    DMA_ClearFlag(DMA1_FLAG_TC1);
   
   SEGGER_RTT_printf(0,"Channel_AD[0]=%u Channel_Volt[0]=%u ",  RegularConvData_Tab[0],( RegularConvData_Tab[0]*330)/4095)   ;
  }
}