你的浏览器版本过低，可能导致网站不能正常访问！
为了你能正常使用网站功能，请使用这些浏览器。

st-img
chrome st-img
firefox st-img
safari st-img
ie8及以上

关于STM32L052采样AD问题

[复制链接]
qihao74 提问时间：2016-1-25 16:24 /
用STM32L052采样AD，两个通道，其中一个通道要用过采样技术，通道的切换是在AD中断进行。请问是否每次都要校准HAL_ADCEx_Calibration_Start()？而每次AD中断中，参数设置的时候，是否都要关中断HAL_ADC_Stop_IT() ，参数设置完在开中断HAL_ADC_Start_IT（）？


/* ADC2 init function */
void MX_ADC2_Init(void)
{
  ADC_ChannelConfTypeDef sConfig;
    /**Configure the global features of the ADC (Clock, Resolution, Data Alignment and number of conversion)
    */
  hadc.Instance = ADC1;
  hadc.Init.OversamplingMode = DISABLE;
  hadc.Init.ClockPrescaler = ADC_CLOCKPRESCALER_PCLK_DIV1;
  hadc.Init.Resolution = ADC_RESOLUTION12b;
  hadc.Init.SamplingTime = ADC_SAMPLETIME_7CYCLES_5;
  hadc.Init.ScanConvMode = ADC_SCAN_DIRECTION_FORWARD;
  hadc.Init.DataAlign = ADC_DATAALIGN_RIGHT;
  hadc.Init.ContinuousConvMode = DISABLE;
  hadc.Init.DiscontinuousConvMode = ENABLE;
  hadc.Init.ExternalTrigConvEdge = ADC_EXTERNALTRIG_EDGE_NONE;
  hadc.Init.DMAContinuousRequests = DISABLE;
  hadc.Init.EOCSelection = EOC_SINGLE_CONV;
  hadc.Init.Overrun = OVR_DATA_PRESERVED;
  hadc.Init.LowPowerAutoWait = DISABLE;
  hadc.Init.LowPowerFrequencyMode = ENABLE;
  hadc.Init.LowPowerAutoPowerOff = DISABLE;
  HAL_ADC_Init(&hadc);
    /**Configure for the selected ADC regular channel to be converted.
    */
  sConfig.Channel = ADC_CHANNEL_2;
  sConfig.Rank = ADC_RANK_CHANNEL_NUMBER;
  HAL_ADC_ConfigChannel(&hadc, &sConfig);
}
/* ADC7 init function */
void MX_ADC7_Init(void)
{
  ADC_ChannelConfTypeDef sConfig;
    /**Configure the global features of the ADC (Clock, Resolution, Data Alignment and number of conversion)
    */
  hadc.Instance = ADC1;
  hadc.Init.OversamplingMode = ENABLE;
  hadc.Init.Oversample.Ratio = ADC_OVERSAMPLING_RATIO_128;
  hadc.Init.Oversample.RightBitShift = ADC_RIGHTBITSHIFT_3;
  hadc.Init.Oversample.TriggeredMode = ADC_TRIGGEREDMODE_SINGLE_TRIGGER;
  hadc.Init.ClockPrescaler = ADC_CLOCKPRESCALER_PCLK_DIV1;
  hadc.Init.Resolution = ADC_RESOLUTION12b;
  hadc.Init.SamplingTime = ADC_SAMPLETIME_7CYCLES_5;
  hadc.Init.ScanConvMode = ADC_SCAN_DIRECTION_FORWARD;
  hadc.Init.DataAlign = ADC_DATAALIGN_RIGHT;
  hadc.Init.ContinuousConvMode = DISABLE;
  hadc.Init.DiscontinuousConvMode = ENABLE;
  hadc.Init.ExternalTrigConvEdge = ADC_EXTERNALTRIG_EDGE_NONE;
  hadc.Init.DMAContinuousRequests = DISABLE;
  hadc.Init.EOCSelection = EOC_SINGLE_CONV;
  hadc.Init.Overrun = OVR_DATA_PRESERVED;
  hadc.Init.LowPowerAutoWait = DISABLE;
  hadc.Init.LowPowerFrequencyMode = ENABLE;
  hadc.Init.LowPowerAutoPowerOff = DISABLE;
  HAL_ADC_Init(&hadc);
    /**Configure for the selected ADC regular channel to be converted.
    */
  sConfig.Channel = ADC_CHANNEL_7;
  sConfig.Rank = ADC_RANK_CHANNEL_NUMBER;
  HAL_ADC_ConfigChannel(&hadc, &sConfig);
}
赞 收藏 评论7 发布时间：2016-1-25 16:24

举报

7个回答
安臣 回答时间：2016-1-26 12:59:00
校准 只需要开机校准

设置 的时候必须关掉中断   设置完成才开启中断。运行ad转换
赞 0 评论
xmshao 回答时间：2016-1-26 16:07:38
每次ADC从关闭到开启时校准一次就OK.
至于你中断处理时是否要关闭相关中断不该有什么硬性规定，你自己最清楚，关于不关会带来什么影响或后果。
赞 0 评论
qihao74 回答时间：2016-1-27 14:54:41
安臣 发表于 2016-1-26 12:59
校准 只需要开机校准

设置 的时候必须关掉中断   设置完成才开启中断。运行ad转换 ...

设置 的时候必须关掉中断   
设置完成才开启中断。
运行ad转换
现在是通道7，可以切到通道2
但通道2，切不到通道7
赞 0 评论
qihao74 回答时间：2016-1-28 09:11:37
uint8_t  CH_dp=0;
/* ADC init function */
void MX_ADC_Init(void)
{
  ADC_ChannelConfTypeDef sConfig;
   
  hadc.Instance = ADC1;

  hadc.Init.OversamplingMode = ENABLE;
  hadc.Init.Oversample.Ratio = ADC_OVERSAMPLING_RATIO_128;
  hadc.Init.Oversample.RightBitShift = ADC_RIGHTBITSHIFT_3;
  hadc.Init.Oversample.TriggeredMode = ADC_TRIGGEREDMODE_SINGLE_TRIGGER;
  
  hadc.Init.ClockPrescaler = ADC_CLOCKPRESCALER_PCLK_DIV1;
  hadc.Init.Resolution = ADC_RESOLUTION12b;
  hadc.Init.SamplingTime = ADC_SAMPLETIME_7CYCLES_5;
  hadc.Init.ScanConvMode = ADC_SCAN_DIRECTION_FORWARD;
  hadc.Init.DataAlign = ADC_DATAALIGN_RIGHT;
  hadc.Init.ContinuousConvMode = ENABLE;
  hadc.Init.DiscontinuousConvMode = DISABLE;
  hadc.Init.ExternalTrigConvEdge = ADC_EXTERNALTRIG_EDGE_NONE;
  hadc.Init.DMAContinuousRequests = DISABLE;
  hadc.Init.EOCSelection = EOC_SINGLE_CONV;
  hadc.Init.Overrun = OVR_DATA_PRESERVED;
  hadc.Init.LowPowerAutoWait = DISABLE;
  hadc.Init.LowPowerFrequencyMode = ENABLE;
  hadc.Init.LowPowerAutoPowerOff = DISABLE;
  HAL_ADC_Init(&hadc);

    /* USER CODE BEGIN 7 */
  if (HAL_ADCEx_Calibration_Start(&hadc, ADC_SINGLE_ENDED) != HAL_OK)
  {
    Error_Handler();
  }
  /* USER CODE END 7 */
    /**Configure for the selected ADC regular channel to be converted.
    */
  sConfig.Channel = ADC_CHANNEL_7;
  sConfig.Rank = ADC_RANK_CHANNEL_NUMBER;
  HAL_ADC_ConfigChannel(&hadc, &sConfig);
}

/* ADC2 init function */
void MX_ADC2_Init(void)
{
  ADC_ChannelConfTypeDef sConfig;
  
  hadc.Instance = ADC1;
  
  hadc.Init.OversamplingMode = ENABLE;
  hadc.Init.Oversample.Ratio = ADC_OVERSAMPLING_RATIO_128;
  hadc.Init.Oversample.RightBitShift = ADC_RIGHTBITSHIFT_3;
  hadc.Init.Oversample.TriggeredMode = ADC_TRIGGEREDMODE_SINGLE_TRIGGER;
  
  hadc.Init.ClockPrescaler = ADC_CLOCKPRESCALER_PCLK_DIV1;
  hadc.Init.Resolution = ADC_RESOLUTION12b;
  hadc.Init.SamplingTime = ADC_SAMPLETIME_7CYCLES_5;
  hadc.Init.ScanConvMode = ADC_SCAN_DIRECTION_FORWARD;//轮流对各个通道进行采集
  hadc.Init.DataAlign = ADC_DATAALIGN_RIGHT;//数据对齐方式
  hadc.Init.ContinuousConvMode = ENABLE;//连续转换模式
  hadc.Init.DiscontinuousConvMode = DISABLE;
  hadc.Init.ExternalTrigConvEdge = ADC_EXTERNALTRIG_EDGE_NONE;//控制触发模式
  hadc.Init.DMAContinuousRequests = DISABLE;
  hadc.Init.EOCSelection = EOC_SINGLE_CONV;
  hadc.Init.Overrun = OVR_DATA_PRESERVED;
  hadc.Init.LowPowerAutoWait = DISABLE;
  hadc.Init.LowPowerFrequencyMode = ENABLE;
  hadc.Init.LowPowerAutoPowerOff = DISABLE;
  HAL_ADC_Init(&hadc);
  
    /**Configure for the selected ADC regular channel to be converted.
    */
  sConfig.Channel = ADC_CHANNEL_2;
  sConfig.Rank = ADC_RANK_CHANNEL_NUMBER;
  HAL_ADC_ConfigChannel(&hadc, &sConfig);
}
/* ADC7 init function */
void MX_ADC7_Init(void)
{
  ADC_ChannelConfTypeDef sConfig;
   
  hadc.Instance = ADC1;

  hadc.Init.OversamplingMode = ENABLE;
  hadc.Init.Oversample.Ratio = ADC_OVERSAMPLING_RATIO_128;
  hadc.Init.Oversample.RightBitShift = ADC_RIGHTBITSHIFT_3;
  hadc.Init.Oversample.TriggeredMode = ADC_TRIGGEREDMODE_SINGLE_TRIGGER;
  
  hadc.Init.ClockPrescaler = ADC_CLOCKPRESCALER_PCLK_DIV1;
  hadc.Init.Resolution = ADC_RESOLUTION12b;
  hadc.Init.SamplingTime = ADC_SAMPLETIME_7CYCLES_5;
  hadc.Init.ScanConvMode = ADC_SCAN_DIRECTION_FORWARD;
  hadc.Init.DataAlign = ADC_DATAALIGN_RIGHT;
  hadc.Init.ContinuousConvMode = ENABLE;
  hadc.Init.DiscontinuousConvMode = DISABLE;
  hadc.Init.ExternalTrigConvEdge = ADC_EXTERNALTRIG_EDGE_NONE;
  hadc.Init.DMAContinuousRequests = DISABLE;
  hadc.Init.EOCSelection = EOC_SINGLE_CONV;
  hadc.Init.Overrun = OVR_DATA_PRESERVED;
  hadc.Init.LowPowerAutoWait = DISABLE;
  hadc.Init.LowPowerFrequencyMode = ENABLE;
  hadc.Init.LowPowerAutoPowerOff = DISABLE;
  HAL_ADC_Init(&hadc);
  
    /**Configure for the selected ADC regular channel to be converted.
    */
  sConfig.Channel = ADC_CHANNEL_7;
  sConfig.Rank = ADC_RANK_CHANNEL_NUMBER;
  HAL_ADC_ConfigChannel(&hadc, &sConfig);
}

void HAL_ADC_ConvCpltCallback(ADC_HandleTypeDef* AdcHandle)
{
  /* Get the converted value of regular channel */
  
  uwADCxConvertedValue = HAL_ADC_GetValue(AdcHandle);
  
  HAL_ADC_Stop_IT(&hadc);
        if(CH_dp==0)
        {
                CH_dp=1;
                MX_ADC2_Init();
        }
        else
        {
                CH_dp=0;
                MX_ADC7_Init();                               
        }
                        
        HAL_ADC_Start_IT(&hadc);
       
  HAL_UART_Transmit_IT(&huart1, (uint8_t*)uwADCxConvertedValue, 4);
}
void HAL_UART_TxCpltCallback(UART_HandleTypeDef *UartHandle)
{
}

int main(void)
{

  /* USER CODE BEGIN 1 */

  /* USER CODE END 1 */

  /* MCU Configuration----------------------------------------------------------*/

  /* Reset of all peripherals, Initializes the Flash interface and the Systick. */
  HAL_Init();

  /* Configure the system clock */
  SystemClock_Config();

  /* Initialize all configured peripherals */
  MX_GPIO_Init();
  MX_ADC_Init();
  MX_COMP1_Init();
  MX_TIM21_Init();
  MX_USART1_UART_Init();

  /* USER CODE BEGIN 2 */
  HAL_COMP_Start(&hcomp1);
  HAL_ADC_Start_IT(&hadc);

  /* USER CODE END 2 */

  /* Infinite loop */
  /* USER CODE BEGIN WHILE */
  while (1)
  {
  /* USER CODE END WHILE */

  /* USER CODE BEGIN 3 */
  }
  
  /* USER CODE END 3 */
}
赞 0 评论
qihao74 回答时间：2016-1-28 12:35:11
感谢，安大师的例程。。
可以了
void HAL_ADC_ConvCpltCallback(ADC_HandleTypeDef* AdcHandle)
{
  /* Get the converted value of regular channel */
  
  uwADCxConvertedValue = HAL_ADC_GetValue(AdcHandle);
  
  HAL_ADC_Stop_IT(&hadc);
        if(CH_dp==0)
        {
                CH_dp=1;
                ADC1->CHSELR = ADC_CHANNEL_2;
        }
        else
        {
                CH_dp=0;
                ADC1->CHSELR = ADC_CHANNEL_7;                                
        }
                        
        HAL_ADC_Start_IT(&hadc);
        
  HAL_UART_Transmit_IT(&huart1, (uint8_t*)uwADCxConvertedValue, 4);
}
赞 0 评论
安臣 回答时间：2016-1-29 11:29:09
赞 0 评论
yangwang98k 回答时间：2019-2-11 11:34:12
QQ截图20190211112948.png 感觉没有这种方便。。。
赞 0 评论

所属标签

相似问题

关于意法半导体
我们是谁
投资者关系
意法半导体可持续发展举措
创新与技术
招聘信息
联系我们
联系ST分支机构
寻找销售人员和分销渠道
社区
媒体中心
活动与培训
隐私策略
隐私策略
Cookies管理
行使您的权利
关注我们
st-img 微信公众号
st-img 手机版