我用的是STM32F030使用多通道DMA采集，发现F0芯片使用cubemx配置跟F1一样的，但是就是读值全都不对，原来F1没有遇到过这种问题，有用过的大神看下配置上有什么需要改的吗？之前有个帖子说自己添加通道，我也添加过了读值还是不对，只配置一个通道设置跟多通道一模一样读值就正确的，应该就是多通道添加有问题。

void MX_ADC_Init(void)

{

  ADC_ChannelConfTypeDef sConfig = {0};



  /** Configure the global features of the ADC (Clock, Resolution, Data Alignment and number of conversion)

  */

  hadc.Instance = ADC1;

  hadc.Init.ClockPrescaler = ADC_CLOCK_SYNC_PCLK_DIV4;

  hadc.Init.Resolution = ADC_RESOLUTION_12B;

  hadc.Init.DataAlign = ADC_DATAALIGN_RIGHT;

  hadc.Init.ScanConvMode = ADC_SCAN_DIRECTION_FORWARD;

  hadc.Init.EOCSelection = ADC_EOC_SEQ_CONV;

  hadc.Init.LowPowerAutoWait = DISABLE;

  hadc.Init.LowPowerAutoPowerOff = DISABLE;

  hadc.Init.ContinuousConvMode = ENABLE;

  hadc.Init.DiscontinuousConvMode = DISABLE;

  hadc.Init.ExternalTrigConv = ADC_SOFTWARE_START;

  hadc.Init.ExternalTrigConvEdge = ADC_EXTERNALTRIGCONVEDGE_NONE;

  hadc.Init.DMAContinuousRequests = ENABLE;

  hadc.Init.Overrun = ADC_OVR_DATA_PRESERVED;

  if (HAL_ADC_Init(&hadc) != HAL_OK)

  {

    Error_Handler();

  }

  /** Configure for the selected ADC regular channel to be converted.

  */

  sConfig.Channel = ADC_CHANNEL_0;

  sConfig.Rank = ADC_RANK_CHANNEL_NUMBER;

  sConfig.SamplingTime = ADC_SAMPLETIME_239CYCLES_5;

  if (HAL_ADC_ConfigChannel(&hadc, &sConfig) != HAL_OK)

  {

    Error_Handler();

  }

  /** Configure for the selected ADC regular channel to be converted.

  */

  sConfig.Channel = ADC_CHANNEL_1;

  if (HAL_ADC_ConfigChannel(&hadc, &sConfig) != HAL_OK)

  {

    Error_Handler();

  }

  /** Configure for the selected ADC regular channel to be converted.

  */

  sConfig.Channel = ADC_CHANNEL_2;

  if (HAL_ADC_ConfigChannel(&hadc, &sConfig) != HAL_OK)

  {

    Error_Handler();

  }

  /** Configure for the selected ADC regular channel to be converted.

  */

  sConfig.Channel = ADC_CHANNEL_3;

  if (HAL_ADC_ConfigChannel(&hadc, &sConfig) != HAL_OK)

  {

    Error_Handler();

  }

  /** Configure for the selected ADC regular channel to be converted.

  */

  sConfig.Channel = ADC_CHANNEL_4;

  if (HAL_ADC_ConfigChannel(&hadc, &sConfig) != HAL_OK)

  {

    Error_Handler();

  }

  /** Configure for the selected ADC regular channel to be converted.

  */

  sConfig.Channel = ADC_CHANNEL_5;

  if (HAL_ADC_ConfigChannel(&hadc, &sConfig) != HAL_OK)

  {

    Error_Handler();

  }



}



这个是添加通道设置

void init_ADCRank(void)

{

ADC_ChannelConfTypeDef sConfig;

sConfig.Channel = ADC_CHANNEL_1;

sConfig.Rank = ADC_RANK_CHANNEL_NUMBER;

sConfig.SamplingTime = ADC_SAMPLETIME_239CYCLES_5;

HAL_ADC_ConfigChannel(&hadc, &sConfig);





sConfig.Channel = ADC_CHANNEL_2;

sConfig.Rank = ADC_RANK_CHANNEL_NUMBER;

sConfig.SamplingTime = ADC_SAMPLETIME_239CYCLES_5;

HAL_ADC_ConfigChannel(&hadc, &sConfig);





sConfig.Channel = ADC_CHANNEL_3;

sConfig.Rank = ADC_RANK_CHANNEL_NUMBER;

sConfig.SamplingTime = ADC_SAMPLETIME_239CYCLES_5;

HAL_ADC_ConfigChannel(&hadc, &sConfig);





sConfig.Channel = ADC_CHANNEL_4;

sConfig.Rank = ADC_RANK_CHANNEL_NUMBER;

sConfig.SamplingTime = ADC_SAMPLETIME_239CYCLES_5;

HAL_ADC_ConfigChannel(&hadc, &sConfig);



sConfig.Channel = ADC_CHANNEL_5;

sConfig.Rank = ADC_RANK_CHANNEL_NUMBER;

sConfig.SamplingTime = ADC_SAMPLETIME_239CYCLES_5;

HAL_ADC_ConfigChannel(&hadc, &sConfig);



}

你也检查下DMA的配置有没有问题，比方源端、目的端数据宽带是否一致；
源端、目的端是否都是DMA可以访问到的

xmshao 发表于 2019-3-19 17:20
你也检查下DMA的配置有没有问题，比方源端、目的端数据宽带是否一致；
源端、目的端是否都是DMA可以访问到 ...

uint32_t AD_Value[N][M]; //用来存放ADC转换结果，也是DMA的目标地址,每通道采N次，M为通道数
HAL_ADC_Start_DMA(&hadc, *AD_Value, N);
带宽大小都一样的啊

用CubeMX生成的ADC初始化代码是：

1. void MX_ADC_Init(void)
   
2. {
   
3. 
   
4.   ADC_ChannelConfTypeDef sConfig;
   
5. 
   
6.     /**Configure the global features of the ADC (Clock, Resolution, Data Alignment and number of conversion)
   
7.     */
   
8.   hadc.Instance = ADC1;
   
9.   hadc.Init.ClockPrescaler = ADC_CLOCK_ASYNC_DIV1;
   
10.   hadc.Init.Resolution = ADC_RESOLUTION_12B;
    
11.   hadc.Init.DataAlign = ADC_DATAALIGN_RIGHT;
    
12.   hadc.Init.ScanConvMode = ADC_SCAN_DIRECTION_FORWARD;
    
13.   hadc.Init.EOCSelection = ADC_EOC_SINGLE_CONV;
    
14.   hadc.Init.LowPowerAutoWait = DISABLE;
    
15.   hadc.Init.LowPowerAutoPowerOff = DISABLE;
    
16.   hadc.Init.ContinuousConvMode = DISABLE;
    
17.   hadc.Init.DiscontinuousConvMode = ENABLE;
    
18.   hadc.Init.ExternalTrigConv = ADC_SOFTWARE_START;
    
19.   hadc.Init.ExternalTrigConvEdge = ADC_EXTERNALTRIGCONVEDGE_NONE;
    
20.   hadc.Init.DMAContinuousRequests = ENABLE;
    
21.   hadc.Init.Overrun = ADC_OVR_DATA_PRESERVED;
    
22.   if (HAL_ADC_Init(&hadc) != HAL_OK)
    
23.   {
    
24.     _Error_Handler(__FILE__, __LINE__);
    
25.   }
    
26. 
    
27.     /**Configure for the selected ADC regular channel to be converted.
    
28.     */
    
29.   sConfig.Channel = ADC_CHANNEL_0;
    
30.   sConfig.Rank = ADC_RANK_CHANNEL_NUMBER;
    
31.   sConfig.SamplingTime = ADC_SAMPLETIME_239CYCLES_5;
    
32.   if (HAL_ADC_ConfigChannel(&hadc, &sConfig) != HAL_OK)
    
33.   {
    
34.     _Error_Handler(__FILE__, __LINE__);
    
35.   }
    
36. 
    
37.     /**Configure for the selected ADC regular channel to be converted.
    
38.     */
    
39.   sConfig.Channel = ADC_CHANNEL_1;
    
40.   if (HAL_ADC_ConfigChannel(&hadc, &sConfig) != HAL_OK)
    
41.   {
    
42.     _Error_Handler(__FILE__, __LINE__);
    
43.   }
    
44. 
    
45.     /**Configure for the selected ADC regular channel to be converted.
    
46.     */
    
47.   sConfig.Channel = ADC_CHANNEL_2;
    
48.   if (HAL_ADC_ConfigChannel(&hadc, &sConfig) != HAL_OK)
    
49.   {
    
50.     _Error_Handler(__FILE__, __LINE__);
    
51.   }
    
52. 
    
53.     /**Configure for the selected ADC regular channel to be converted.
    
54.     */
    
55.   sConfig.Channel = ADC_CHANNEL_3;
    
56.   if (HAL_ADC_ConfigChannel(&hadc, &sConfig) != HAL_OK)
    
57.   {
    
58.     _Error_Handler(__FILE__, __LINE__);
    
59.   }
    
60. 
    
61.     /**Configure for the selected ADC regular channel to be converted.
    
62.     */
    
63.   sConfig.Channel = ADC_CHANNEL_4;
    
64.   if (HAL_ADC_ConfigChannel(&hadc, &sConfig) != HAL_OK)
    
65.   {
    
66.     _Error_Handler(__FILE__, __LINE__);
    
67.   }
    
68. 
    
69.     /**Configure for the selected ADC regular channel to be converted.
    
70.     */
    
71.   sConfig.Channel = ADC_CHANNEL_5;
    
72.   if (HAL_ADC_ConfigChannel(&hadc, &sConfig) != HAL_OK)
    
73.   {
    
74.     _Error_Handler(__FILE__, __LINE__);
    
75.   }
    
76. 
    
77.   
    
78. 
    
79. }

复制代码

无需再来一个 Int_ADCRank（）函数。因为：
如果所有通道转换速率相同，
则
sConfig.Channel = ADC_CHANNEL_0;
sConfig.Rank = ADC_RANK_CHANNEL_NUMBER;
sConfig.SamplingTime = ADC_SAMPLETIME_239CYCLES_5;
于是下面紧跟的其他通道都默认上面的设置。

然后需要：
HAL_ADC_Start_DMA(&hadc1, (uint32_t *)&ADC_Value, ADC_Number*ADC_Channel)；
才能启动ADC读数据。每次DMA传输的数据是转换次数×ADC通道数，保存在ADC_Value[]数组中。

wenyangzeng 发表于 2019-3-19 21:04
用CubeMX生成的ADC初始化代码是：
无需再来一个 Int_ADCRank（）函数。因为：
如果所有通道转换速率相同，

谢谢大神，原来是转换次数×ADC通道数那个地方没设置对，太感谢了

HAL_ADC_Start_DMA(&hadc, *AD_Value, N);  是这里有问题吧？

Kevin201707 发表于 2019-3-20 10:00
HAL_ADC_Start_DMA(&hadc, *AD_Value, N);  是这里有问题吧？

是的就是这里的问题，应该是单通道采集次数*通道数

我也是这里的问题。读出来的值都不对，但是我不是用的二维数组去存放ADC的值，我是用一维数组，通过DMA连续读取，不断覆盖之前的数据，求教~!!!