ST意法半导体中文论坛求助 STM32F302RC ADC2的问题

求助 STM32F302RC ADC2的问题

dldz525 提问时间：2016-11-20 16:39 /

问答
是否解决:

本人接触stm32f 时间不长，在一个项目上使用了stm32f302rc这个芯片，初始化代码用的是STM32CubeMX生成的。ADC1、ADC2各有4路模拟输入。目前遇到的问题是ADC1采样正常，但ADC2采样不正常，输入0V时ADC2转换始终不为零，折合电压大概有0.9V左右（3.3V基准）。这个问题已经困扰了几天了，还没有解决。求各位高人帮忙看看，如何解决。
谢谢！！
以下是初始化代码：

ADC_HandleTypeDef hadc1;
ADC_HandleTypeDef hadc2;
ADC_MultiModeTypeDef multi;
DMA_HandleTypeDef hdma_adc1;
DMA_HandleTypeDef hdma_adc2;
/* ADC1 init function */
void MX_ADC1_Init(void)
{
ADC_ChannelConfTypeDef sConfig;
/**Common config */
hadc1.Instance = ADC1;
hadc1.Init.ClockPrescaler = ADC_CLOCK_SYNC_PCLK_DIV1;
hadc1.Init.Resolution = ADC_RESOLUTION_12B;
hadc1.Init.ScanConvMode = ADC_SCAN_ENABLE;
hadc1.Init.ContinuousConvMode = DISABLE;
hadc1.Init.DiscontinuousConvMode = DISABLE;
hadc1.Init.ExternalTrigConvEdge = ADC_EXTERNALTRIGCONVEDGE_RISING;
hadc1.Init.ExternalTrigConv = ADC_EXTERNALTRIGCONV_T4_TRGO;
hadc1.Init.DataAlign = ADC_DATAALIGN_RIGHT;
hadc1.Init.NbrOfConversion = 4;
hadc1.Init.DMAContinuousRequests =DISABLE;
hadc1.Init.EOCSelection = ADC_EOC_SINGLE_CONV;
hadc1.Init.LowPowerAutoWait = DISABLE;
hadc1.Init.Overrun = ADC_OVR_DATA_OVERWRITTEN;
if (HAL_ADC_Init(&hadc1) != HAL_OK)
{
Error_Handler();
}
/**Configure Regular Channel */
sConfig.SingleDiff = ADC_SINGLE_ENDED;
sConfig.SamplingTime = ADC_SAMPLETIME_19CYCLES_5;
sConfig.OffsetNumber = ADC_OFFSET_NONE;
sConfig.Offset = 0;
sConfig.Channel = ADC_CHANNEL_1;
sConfig.Rank = 1;
if (HAL_ADC_ConfigChannel(&hadc1, &sConfig) != HAL_OK)
{
Error_Handler();
}
/**Configure Regular Channel*/
sConfig.Channel = ADC_CHANNEL_2;
sConfig.Rank = 2;
if (HAL_ADC_ConfigChannel(&hadc1, &sConfig) != HAL_OK)
{
Error_Handler();
}
/**Configure Regular Channel*/
sConfig.Channel = ADC_CHANNEL_3;
sConfig.Rank = 3;
if (HAL_ADC_ConfigChannel(&hadc1, &sConfig) != HAL_OK)
{
Error_Handler();
}
/**Configure Regular Channel*/
sConfig.Channel = ADC_CHANNEL_4;
sConfig.Rank = 4;
if (HAL_ADC_ConfigChannel(&hadc1, &sConfig) != HAL_OK)
{
Error_Handler();
}
HAL_ADCEx_Calibration_Start(&hadc1, ADC_SINGLE_ENDED);
HAL_ADC_Start_DMA(&hadc1, (U32*)ADC1_ConvertedValue,ADC_SampleCount);
}
/* ADC2 init function */
void MX_ADC2_Init(void)
{
ADC_ChannelConfTypeDef sConfig;
/**Common config */
hadc2.Instance = ADC2;
hadc2.Init.ClockPrescaler = ADC_CLOCK_SYNC_PCLK_DIV1;
hadc2.Init.Resolution = ADC_RESOLUTION_12B;
hadc2.Init.ScanConvMode = ADC_SCAN_ENABLE;
hadc2.Init.ContinuousConvMode = DISABLE;
hadc2.Init.DiscontinuousConvMode = DISABLE;
hadc2.Init.ExternalTrigConvEdge = ADC_EXTERNALTRIGCONVEDGE_RISING;
hadc2.Init.ExternalTrigConv = ADC_EXTERNALTRIGCONV_T4_TRGO;
hadc2.Init.DataAlign = ADC_DATAALIGN_RIGHT;
hadc2.Init.NbrOfConversion = 4;
hadc2.Init.DMAContinuousRequests = DISABLE;
hadc2.Init.EOCSelection = ADC_EOC_SINGLE_CONV;
hadc2.Init.LowPowerAutoWait = DISABLE;
hadc2.Init.Overrun = ADC_OVR_DATA_OVERWRITTEN;
if (HAL_ADC_Init(&hadc2) != HAL_OK)
{
Error_Handler();
}
/**Configure Regular Channel*/
sConfig.SingleDiff = ADC_SINGLE_ENDED;
sConfig.SamplingTime = ADC_SAMPLETIME_19CYCLES_5;
sConfig.OffsetNumber = ADC_OFFSET_NONE;
sConfig.Offset = 0;
sConfig.Channel = ADC_CHANNEL_6;
sConfig.Rank = 1;
if (HAL_ADC_ConfigChannel(&hadc2, &sConfig) != HAL_OK)
{
Error_Handler();
}
/**Configure Regular Channel */
sConfig.Channel = ADC_CHANNEL_7;
sConfig.Rank = 2;
if (HAL_ADC_ConfigChannel(&hadc2, &sConfig) != HAL_OK)
{
Error_Handler();
}
/**Configure Regular Channel*/
sConfig.Channel = ADC_CHANNEL_8;
sConfig.Rank = 3;
if (HAL_ADC_ConfigChannel(&hadc2, &sConfig) != HAL_OK)
{
Error_Handler();
}
/**Configure Regular Channel*/
sConfig.Channel = ADC_CHANNEL_9;
sConfig.Rank = 4;
if (HAL_ADC_ConfigChannel(&hadc2, &sConfig) != HAL_OK)
{
Error_Handler();
}
multi.Mode = ADC_MODE_INDEPENDENT;
multi.DMAAccessMode = ADC_DMAACCESSMODE_DISABLED;
if (HAL_ADCEx_MultiModeConfigChannel(&hadc2, &multi)!=HAL_OK)
{
Error_Handler();
}
HAL_ADCEx_Calibration_Start(&hadc2, ADC_SINGLE_ENDED);
HAL_ADC_Start_DMA(&hadc2, (U32*)ADC2_ConvertedValue, ADC_SampleCount);
}
static uint32_t HAL_RCC_ADC12_CLK_ENABLED=0;
void HAL_ADC_MspInit(ADC_HandleTypeDef* adcHandle)
{
GPIO_InitTypeDef GPIO_InitStruct;
if(adcHandle->Instance==ADC1)
{
/* Peripheral clock enable */
HAL_RCC_ADC12_CLK_ENABLED++;
if(HAL_RCC_ADC12_CLK_ENABLED==1){
__HAL_RCC_ADC12_CLK_ENABLE();
}
/**ADC1 GPIO Configuration
PA0 ------> ADC1_IN1
PA1 ------> ADC1_IN2
PA2 ------> ADC1_IN3
PA3 ------> ADC1_IN4
*/
GPIO_InitStruct.Pin = GPIO_PIN_0|GPIO_PIN_1|GPIO_PIN_2|GPIO_PIN_3;
GPIO_InitStruct.Mode = GPIO_MODE_ANALOG;
GPIO_InitStruct.Pull = GPIO_NOPULL;
HAL_GPIO_Init(GPIOA, &GPIO_InitStruct);
/* Peripheral DMA init*/
hdma_adc1.Instance = DMA1_Channel1;
hdma_adc1.Init.Direction = DMA_PERIPH_TO_MEMORY;
hdma_adc1.Init.PeriphInc = DMA_PINC_DISABLE;
hdma_adc1.Init.MemInc = DMA_MINC_ENABLE;
hdma_adc1.Init.PeriphDataAlignment = DMA_PDATAALIGN_HALFWORD;
hdma_adc1.Init.MemDataAlignment = DMA_MDATAALIGN_HALFWORD;
hdma_adc1.Init.Mode = DMA_CIRCULAR;//DMA_NORMAL;
hdma_adc1.Init.Priority = DMA_PRIORITY_MEDIUM;
if (HAL_DMA_Init(&hdma_adc1) != HAL_OK)
{
Error_Handler();
}
__HAL_LINKDMA(adcHandle,DMA_Handle,hdma_adc1);
/* Peripheral interrupt init */
//HAL_NVIC_SetPriority(ADC1_2_IRQn, 0, 0);
//HAL_NVIC_EnableIRQ(ADC1_2_IRQn);
}
else if(adcHandle->Instance==ADC2)
{
/* Peripheral clock enable */
HAL_RCC_ADC12_CLK_ENABLED++;
if(HAL_RCC_ADC12_CLK_ENABLED==1){
__HAL_RCC_ADC12_CLK_ENABLE();
}
/**ADC2 GPIO Configuration
PC0 ------> ADC2_IN6
PC1 ------> ADC2_IN7
PC2 ------> ADC2_IN8
PC3 ------> ADC2_IN9
*/
GPIO_InitStruct.Pin = GPIO_PIN_0|GPIO_PIN_1|GPIO_PIN_2|GPIO_PIN_3;
GPIO_InitStruct.Mode = GPIO_MODE_ANALOG;
GPIO_InitStruct.Pull = GPIO_NOPULL;
HAL_GPIO_Init(GPIOC, &GPIO_InitStruct);
/* Peripheral DMA init*/
hdma_adc2.Instance = DMA2_Channel1;
hdma_adc2.Init.Direction = DMA_PERIPH_TO_MEMORY;
hdma_adc2.Init.PeriphInc = DMA_PINC_DISABLE;
hdma_adc2.Init.MemInc = DMA_MINC_ENABLE;
hdma_adc2.Init.PeriphDataAlignment = DMA_PDATAALIGN_HALFWORD;
hdma_adc2.Init.MemDataAlignment = DMA_MDATAALIGN_HALFWORD;
hdma_adc2.Init.Mode = DMA_CIRCULAR;//DMA_NORMAL;
hdma_adc2.Init.Priority = DMA_PRIORITY_MEDIUM;
if (HAL_DMA_Init(&hdma_adc2) != HAL_OK)
{
Error_Handler();
}
__HAL_LINKDMA(adcHandle,DMA_Handle,hdma_adc2);
/* Peripheral interrupt init */
//HAL_NVIC_SetPriority(ADC1_2_IRQn, 0, 0);
//HAL_NVIC_EnableIRQ(ADC1_2_IRQn);
}
}

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赞收藏 1 评论13 发布时间：2016-11-20 16:39

13个回答

xuezhimeng2010 回答时间：2016-11-22 09:45:13

首先楼主这代码不是cube完全自动生成的，也就是说你自己修改过，至于你修改了哪部分就不得而知了。
另外你adc2为什么会有multimode的设置，如果是配置的independent模式的话，应该是没有双adc模式的配置的。
我没有302的片子，只是根据经验配置了一下，你可以试试我生成的代码；

/* Includes ------------------------------------------------------------------*/
#include "adc.h"
#include "gpio.h"
#include "dma.h"
/* USER CODE BEGIN 0 */
/* USER CODE END 0 */
ADC_HandleTypeDef hadc1;
ADC_HandleTypeDef hadc2;
DMA_HandleTypeDef hdma_adc1;
DMA_HandleTypeDef hdma_adc2;
/* ADC1 init function */
void MX_ADC1_Init(void)
{
ADC_ChannelConfTypeDef sConfig;
/**Common config
*/
hadc1.Instance = ADC1;
hadc1.Init.ClockPrescaler = ADC_CLOCK_ASYNC_DIV1;
hadc1.Init.Resolution = ADC_RESOLUTION_12B;
hadc1.Init.ScanConvMode = ADC_SCAN_ENABLE;
hadc1.Init.ContinuousConvMode = DISABLE;
hadc1.Init.DiscontinuousConvMode = DISABLE;
hadc1.Init.ExternalTrigConvEdge = ADC_EXTERNALTRIGCONVEDGE_RISING;
hadc1.Init.ExternalTrigConv = ADC_EXTERNALTRIGCONV_T4_TRGO;
hadc1.Init.DataAlign = ADC_DATAALIGN_RIGHT;
hadc1.Init.NbrOfConversion = 4;
hadc1.Init.DMAContinuousRequests = DISABLE;
hadc1.Init.EOCSelection = ADC_EOC_SEQ_CONV;
hadc1.Init.LowPowerAutoWait = DISABLE;
hadc1.Init.Overrun = ADC_OVR_DATA_OVERWRITTEN;
if (HAL_ADC_Init(&hadc1) != HAL_OK)
{
Error_Handler();
}
/**Configure Regular Channel
*/
sConfig.Channel = ADC_CHANNEL_1;
sConfig.Rank = 1;
sConfig.SingleDiff = ADC_SINGLE_ENDED;
sConfig.SamplingTime = ADC_SAMPLETIME_1CYCLE_5;
sConfig.OffsetNumber = ADC_OFFSET_NONE;
sConfig.Offset = 0;
if (HAL_ADC_ConfigChannel(&hadc1, &sConfig) != HAL_OK)
{
Error_Handler();
}
/**Configure Regular Channel
*/
sConfig.Channel = ADC_CHANNEL_2;
sConfig.Rank = 2;
if (HAL_ADC_ConfigChannel(&hadc1, &sConfig) != HAL_OK)
{
Error_Handler();
}
/**Configure Regular Channel
*/
sConfig.Channel = ADC_CHANNEL_3;
sConfig.Rank = 3;
if (HAL_ADC_ConfigChannel(&hadc1, &sConfig) != HAL_OK)
{
Error_Handler();
}
/**Configure Regular Channel
*/
sConfig.Channel = ADC_CHANNEL_4;
sConfig.Rank = 4;
if (HAL_ADC_ConfigChannel(&hadc1, &sConfig) != HAL_OK)
{
Error_Handler();
}
}
/* ADC2 init function */
void MX_ADC2_Init(void)
{
ADC_ChannelConfTypeDef sConfig;
/**Common config
*/
hadc2.Instance = ADC2;
hadc2.Init.ClockPrescaler = ADC_CLOCK_ASYNC_DIV1;
hadc2.Init.Resolution = ADC_RESOLUTION_12B;
hadc2.Init.ScanConvMode = ADC_SCAN_ENABLE;
hadc2.Init.ContinuousConvMode = DISABLE;
hadc2.Init.DiscontinuousConvMode = DISABLE;
hadc2.Init.ExternalTrigConvEdge = ADC_EXTERNALTRIGCONVEDGE_RISING;
hadc2.Init.ExternalTrigConv = ADC_EXTERNALTRIGCONV_T4_TRGO;
hadc2.Init.DataAlign = ADC_DATAALIGN_RIGHT;
hadc2.Init.NbrOfConversion = 4;
hadc2.Init.DMAContinuousRequests = DISABLE;
hadc2.Init.EOCSelection = ADC_EOC_SEQ_CONV;
hadc2.Init.LowPowerAutoWait = DISABLE;
hadc2.Init.Overrun = ADC_OVR_DATA_OVERWRITTEN;
if (HAL_ADC_Init(&hadc2) != HAL_OK)
{
Error_Handler();
}
/**Configure Regular Channel
*/
sConfig.Channel = ADC_CHANNEL_6;
sConfig.Rank = 1;
sConfig.SingleDiff = ADC_SINGLE_ENDED;
sConfig.SamplingTime = ADC_SAMPLETIME_1CYCLE_5;
sConfig.OffsetNumber = ADC_OFFSET_NONE;
sConfig.Offset = 0;
if (HAL_ADC_ConfigChannel(&hadc2, &sConfig) != HAL_OK)
{
Error_Handler();
}
/**Configure Regular Channel
*/
sConfig.Channel = ADC_CHANNEL_7;
sConfig.Rank = 2;
if (HAL_ADC_ConfigChannel(&hadc2, &sConfig) != HAL_OK)
{
Error_Handler();
}
/**Configure Regular Channel
*/
sConfig.Channel = ADC_CHANNEL_8;
sConfig.Rank = 3;
if (HAL_ADC_ConfigChannel(&hadc2, &sConfig) != HAL_OK)
{
Error_Handler();
}
/**Configure Regular Channel
*/
sConfig.Channel = ADC_CHANNEL_9;
sConfig.Rank = 4;
if (HAL_ADC_ConfigChannel(&hadc2, &sConfig) != HAL_OK)
{
Error_Handler();
}
}
static uint32_t HAL_RCC_ADC12_CLK_ENABLED=0;
void HAL_ADC_MspInit(ADC_HandleTypeDef* adcHandle)
{
GPIO_InitTypeDef GPIO_InitStruct;
if(adcHandle->Instance==ADC1)
{
/* USER CODE BEGIN ADC1_MspInit 0 */
/* USER CODE END ADC1_MspInit 0 */
/* Peripheral clock enable */
HAL_RCC_ADC12_CLK_ENABLED++;
if(HAL_RCC_ADC12_CLK_ENABLED==1){
__HAL_RCC_ADC12_CLK_ENABLE();
}
/**ADC1 GPIO Configuration
PA0 ------> ADC1_IN1
PA1 ------> ADC1_IN2
PA2 ------> ADC1_IN3
PA3 ------> ADC1_IN4
*/
GPIO_InitStruct.Pin = GPIO_PIN_0|GPIO_PIN_1|GPIO_PIN_2|GPIO_PIN_3;
GPIO_InitStruct.Mode = GPIO_MODE_ANALOG;
GPIO_InitStruct.Pull = GPIO_NOPULL;
HAL_GPIO_Init(GPIOA, &GPIO_InitStruct);
/* Peripheral DMA init*/
hdma_adc1.Instance = DMA1_Channel1;
hdma_adc1.Init.Direction = DMA_PERIPH_TO_MEMORY;
hdma_adc1.Init.PeriphInc = DMA_PINC_DISABLE;
hdma_adc1.Init.MemInc = DMA_MINC_ENABLE;
hdma_adc1.Init.PeriphDataAlignment = DMA_PDATAALIGN_HALFWORD;
hdma_adc1.Init.MemDataAlignment = DMA_MDATAALIGN_HALFWORD;
hdma_adc1.Init.Mode = DMA_CIRCULAR;
hdma_adc1.Init.Priority = DMA_PRIORITY_LOW;
if (HAL_DMA_Init(&hdma_adc1) != HAL_OK)
{
Error_Handler();
}
__HAL_LINKDMA(adcHandle,DMA_Handle,hdma_adc1);
/* USER CODE BEGIN ADC1_MspInit 1 */
/* USER CODE END ADC1_MspInit 1 */
}
else if(adcHandle->Instance==ADC2)
{
/* USER CODE BEGIN ADC2_MspInit 0 */
/* USER CODE END ADC2_MspInit 0 */
/* Peripheral clock enable */
HAL_RCC_ADC12_CLK_ENABLED++;
if(HAL_RCC_ADC12_CLK_ENABLED==1){
__HAL_RCC_ADC12_CLK_ENABLE();
}
/**ADC2 GPIO Configuration
PC0 ------> ADC2_IN6
PC1 ------> ADC2_IN7
PC2 ------> ADC2_IN8
PC3 ------> ADC2_IN9
*/
GPIO_InitStruct.Pin = GPIO_PIN_0|GPIO_PIN_1|GPIO_PIN_2|GPIO_PIN_3;
GPIO_InitStruct.Mode = GPIO_MODE_ANALOG;
GPIO_InitStruct.Pull = GPIO_NOPULL;
HAL_GPIO_Init(GPIOC, &GPIO_InitStruct);
/* Peripheral DMA init*/
hdma_adc2.Instance = DMA2_Channel1;
hdma_adc2.Init.Direction = DMA_PERIPH_TO_MEMORY;
hdma_adc2.Init.PeriphInc = DMA_PINC_DISABLE;
hdma_adc2.Init.MemInc = DMA_MINC_ENABLE;
hdma_adc2.Init.PeriphDataAlignment = DMA_PDATAALIGN_HALFWORD;
hdma_adc2.Init.MemDataAlignment = DMA_MDATAALIGN_HALFWORD;
hdma_adc2.Init.Mode = DMA_CIRCULAR;
hdma_adc2.Init.Priority = DMA_PRIORITY_LOW;
if (HAL_DMA_Init(&hdma_adc2) != HAL_OK)
{
Error_Handler();
}
__HAL_LINKDMA(adcHandle,DMA_Handle,hdma_adc2);
/* USER CODE BEGIN ADC2_MspInit 1 */
/* USER CODE END ADC2_MspInit 1 */
}
}
void HAL_ADC_MspDeInit(ADC_HandleTypeDef* adcHandle)
{
if(adcHandle->Instance==ADC1)
{
/* USER CODE BEGIN ADC1_MspDeInit 0 */
/* USER CODE END ADC1_MspDeInit 0 */
/* Peripheral clock disable */
HAL_RCC_ADC12_CLK_ENABLED--;
if(HAL_RCC_ADC12_CLK_ENABLED==0){
__HAL_RCC_ADC12_CLK_DISABLE();
}
/**ADC1 GPIO Configuration
PA0 ------> ADC1_IN1
PA1 ------> ADC1_IN2
PA2 ------> ADC1_IN3
PA3 ------> ADC1_IN4
*/
HAL_GPIO_DeInit(GPIOA, GPIO_PIN_0|GPIO_PIN_1|GPIO_PIN_2|GPIO_PIN_3);
/* Peripheral DMA DeInit*/
HAL_DMA_DeInit(adcHandle->DMA_Handle);
/* USER CODE BEGIN ADC1_MspDeInit 1 */
/* USER CODE END ADC1_MspDeInit 1 */
}
else if(adcHandle->Instance==ADC2)
{
/* USER CODE BEGIN ADC2_MspDeInit 0 */
/* USER CODE END ADC2_MspDeInit 0 */
/* Peripheral clock disable */
HAL_RCC_ADC12_CLK_ENABLED--;
if(HAL_RCC_ADC12_CLK_ENABLED==0){
__HAL_RCC_ADC12_CLK_DISABLE();
}
/**ADC2 GPIO Configuration
PC0 ------> ADC2_IN6
PC1 ------> ADC2_IN7
PC2 ------> ADC2_IN8
PC3 ------> ADC2_IN9
*/
HAL_GPIO_DeInit(GPIOC, GPIO_PIN_0|GPIO_PIN_1|GPIO_PIN_2|GPIO_PIN_3);
/* Peripheral DMA DeInit*/
HAL_DMA_DeInit(adcHandle->DMA_Handle);
/* USER CODE BEGIN ADC2_MspDeInit 1 */
/* USER CODE END ADC2_MspDeInit 1 */
}
}

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无薪税绵回答时间：2016-11-22 08:22:37

楼主试试关闭ADC1，单独使用ADC2看正常不。
如果不正常，就是ADC2未正常初始化。

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zhulikai 回答时间：2016-11-22 08:22:52

帮顶了

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z258121131 回答时间：2016-11-22 09:02:56

帮顶，楼主解决后发一下。

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zhcj66 回答时间：2016-11-22 09:05:55

帮顶，楼主用ADC1的代码在改为ADC2试试

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chaplin1999-262 回答时间：2016-11-22 09:14:50

adc2 pc端口除了adc外有没有接5v的外设？接的话，好像会有影响！

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xuezhimeng2010 回答时间：2016-11-22 09:48:55

楼主不要随意修改自动生成的代码部分，这样如果有地方配置错了，再次使用cube配置时，会覆盖掉你修改的代码的。你只能在
/* USER CODE BEGIN ADC2_MspDeInit 1 */

/* USER CODE END ADC2_MspDeInit 1 */
这样的结构内部添加/修改你的代码，或者另外独立建立文件，如果没有使用代码管理，你会发现你所修改的内容，再次使用cube配置时被改的体无完肤，你会欲哭无泪的