Question

我正尝试将STM32F411RE DMA与ADC结合使用，以获取3个输入通道/引脚各自的2048个采样。 A0，A1和A2引脚连接到要使用图像处理（傅立叶变换）的传感器。

因此，我使用DMA / ADC用来自3个引脚的所有2048个采样填充adc_buffer[6144]，并使用中断来查找该缓冲区何时已满。当缓冲区已满时，应将数据转换为电压并放入正确的bin中（数据进入x，y，z，x，y，z）。

尽管由于某种原因我可以进行所有操作，但我的DMA循环缓冲区未填满数据。在以前的程序中，此方法运行良好，但现在无法进行工作：在程序运行期间adc_buffer始终为0，因此ISR HAL_ADC_ConvCpltCallback从未触发。


#include "main.h"
#include "arm_const_structs.h"
#include "core_cm4.h"
#include "math.h"
#include "arm_math.h"
#include <stdio.h>
#include <stdbool.h>
#include "main.h"

ADC_HandleTypeDef hadc1;
DMA_HandleTypeDef hdma_adc1;
UART_HandleTypeDef huart2;

void SystemClock_Config(void);
static void MX_GPIO_Init(void);
static void MX_DMA_Init(void);
static void MX_ADC1_Init(void);
static void MX_USART2_UART_Init(void);

float adc_buffer[6144] = {0}; // 2048 samples * 3 channels

/*
 * Interrupt called when the input buffer adc_buffer is full.
 * TO DO: Add   void HAL_ADC_ConvHalfCpltCallback(ADC_HandleTypeDef* hadc)  for double buffering, when conversion is half complete also run Fourier transform
 */
void HAL_ADC_ConvCpltCallback(ADC_HandleTypeDef* hadc)
{
    if(hadc->Instance == ADC1)  //  if(hadc->Instance == ADC1 && !conversionPaused)
    {
        conversionPaused = 1;   // Temporarily disable the conversion process
        for (int samples= 0; samples < fftLen; samples++)   // Allocates data from the 1 ADC buffer into the 3 separate axis buffers
        {
            Xin[samples] = ((3.3-0)/4096) * adc_buffer[0+3*samples];    // Allocate samples to X array, whilst transforming them into voltage: every 3rd value starting at 0 (0, 3, 6, 9)
            Yin[samples] = ((3.3-0)/4096) * adc_buffer[1+3*samples];    // Allocate samples to X array, whilst transforming them into voltage: every 3rd value starting at 1 (1, 4, 7, 10)
            Zin[samples] = ((3.3-0)/4096) * adc_buffer[2+3*samples];    // Allocate samples to X array, whilst transforming them into voltage: every 3rd value starting at 2 (2, 5, 8, 11)
        }
    }
}

int main(void)
{

    HAL_Init();
    SystemClock_Config();
    MX_GPIO_Init();
    MX_DMA_Init();
    MX_ADC1_Init();
    MX_USART2_UART_Init();

    HAL_ADC_Start_IT(&hadc1);
    HAL_ADC_Start_DMA(&hadc1, adc_buffer, bufferLen);   // Maybe DMA and ADC IT are mutually exclusive?

    while (1)
    {
        // Signal processing on Xin, Yin, Zin
    }


/**
  * @brief System Clock Configuration
  * @retval None
  */
void SystemClock_Config(void)
{
  RCC_OscInitTypeDef RCC_OscInitStruct = {0};
  RCC_ClkInitTypeDef RCC_ClkInitStruct = {0};

  /** Configure the main internal regulator output voltage 
  */
  __HAL_RCC_PWR_CLK_ENABLE();
  __HAL_PWR_VOLTAGESCALING_CONFIG(PWR_REGULATOR_VOLTAGE_SCALE1);
  /** Initializes the CPU, AHB and APB busses clocks 
  */
  RCC_OscInitStruct.OscillatorType = RCC_OSCILLATORTYPE_HSI;
  RCC_OscInitStruct.HSIState = RCC_HSI_ON;
  RCC_OscInitStruct.HSICalibrationValue = RCC_HSICALIBRATION_DEFAULT;
  RCC_OscInitStruct.PLL.PLLState = RCC_PLL_ON;
  RCC_OscInitStruct.PLL.PLLSource = RCC_PLLSOURCE_HSI;
  RCC_OscInitStruct.PLL.PLLM = 16;
  RCC_OscInitStruct.PLL.PLLN = 393;
  RCC_OscInitStruct.PLL.PLLP = RCC_PLLP_DIV4;
  RCC_OscInitStruct.PLL.PLLQ = 4;
  if (HAL_RCC_OscConfig(&RCC_OscInitStruct) != HAL_OK)
  {
    Error_Handler();
  }
  /** Initializes the CPU, AHB and APB busses clocks 
  */
  RCC_ClkInitStruct.ClockType = RCC_CLOCKTYPE_HCLK|RCC_CLOCKTYPE_SYSCLK
                              |RCC_CLOCKTYPE_PCLK1|RCC_CLOCKTYPE_PCLK2;
  RCC_ClkInitStruct.SYSCLKSource = RCC_SYSCLKSOURCE_PLLCLK;
  RCC_ClkInitStruct.AHBCLKDivider = RCC_SYSCLK_DIV1;
  RCC_ClkInitStruct.APB1CLKDivider = RCC_HCLK_DIV8;
  RCC_ClkInitStruct.APB2CLKDivider = RCC_HCLK_DIV8;

  if (HAL_RCC_ClockConfig(&RCC_ClkInitStruct, FLASH_LATENCY_3) != HAL_OK)
  {
    Error_Handler();
  }
}

/**
  * @brief ADC1 Initialization Function
  * @param None
  * @retval None
  */
static void MX_ADC1_Init(void)
{
  ADC_ChannelConfTypeDef sConfig = {0};

  /** Configure the global features of the ADC (Clock, Resolution, Data Alignment and number of conversion) 
  */
  hadc1.Instance = ADC1;
  hadc1.Init.ClockPrescaler = ADC_CLOCK_SYNC_PCLK_DIV8;
  hadc1.Init.Resolution = ADC_RESOLUTION_12B;
  hadc1.Init.ScanConvMode = ENABLE;
  hadc1.Init.ContinuousConvMode = ENABLE;           // Maybe this needs to be set to off for use with the circular buffer?
  hadc1.Init.DiscontinuousConvMode = DISABLE;
  hadc1.Init.ExternalTrigConvEdge = ADC_EXTERNALTRIGCONVEDGE_NONE;
  hadc1.Init.ExternalTrigConv = ADC_SOFTWARE_START;
  hadc1.Init.DataAlign = ADC_DATAALIGN_RIGHT;
  hadc1.Init.NbrOfConversion = 3;
  hadc1.Init.DMAContinuousRequests = DISABLE;
  hadc1.Init.EOCSelection = DISABLE; //ADC_EOC_SINGLE_CONV
  if (HAL_ADC_Init(&hadc1) != HAL_OK)
  {
    Error_Handler();
  }
  /** Configure for the selected ADC regular channel its corresponding rank in the sequencer and its sample time. 
  */
  sConfig.Channel = ADC_CHANNEL_0;
  sConfig.Rank = 1;
  sConfig.SamplingTime = ADC_SAMPLETIME_56CYCLES;
  if (HAL_ADC_ConfigChannel(&hadc1, &sConfig) != HAL_OK)
  {
    Error_Handler();
  }
  /** Configure for the selected ADC regular channel its corresponding rank in the sequencer and its sample time. 
  */
  sConfig.Channel = ADC_CHANNEL_1;
  sConfig.Rank = 2;
  if (HAL_ADC_ConfigChannel(&hadc1, &sConfig) != HAL_OK)
  {
    Error_Handler();
  }
  /** Configure for the selected ADC regular channel its corresponding rank in the sequencer and its sample time. 
  */
  sConfig.Channel = ADC_CHANNEL_4;
  sConfig.Rank = 3;
  if (HAL_ADC_ConfigChannel(&hadc1, &sConfig) != HAL_OK)
  {
    Error_Handler();
  }
}

/**
  * @brief USART2 Initialization Function
  * @param None
  * @retval None
  */
static void MX_USART2_UART_Init(void)
{

  huart2.Instance = USART2;
  huart2.Init.BaudRate = 115200;
  huart2.Init.WordLength = UART_WORDLENGTH_8B;
  huart2.Init.StopBits = UART_STOPBITS_1;
  huart2.Init.Parity = UART_PARITY_NONE;
  huart2.Init.Mode = UART_MODE_TX_RX;
  huart2.Init.HwFlowCtl = UART_HWCONTROL_NONE;
  huart2.Init.OverSampling = UART_OVERSAMPLING_16;
  if (HAL_UART_Init(&huart2) != HAL_OK)
  {
    Error_Handler();
  }
}

/** 
  * Enable DMA controller clock
  */
static void MX_DMA_Init(void) 
{
  /* DMA controller clock enable */
  __HAL_RCC_DMA2_CLK_ENABLE();

  /* DMA interrupt init */
  /* DMA2_Stream0_IRQn interrupt configuration */
  HAL_NVIC_SetPriority(DMA2_Stream0_IRQn, 0, 0);
  HAL_NVIC_EnableIRQ(DMA2_Stream0_IRQn);
}

/**
  * @brief GPIO Initialization Function
  * @param None
  * @retval None
  */
static void MX_GPIO_Init(void)
{

  /* GPIO Ports Clock Enable */
  __HAL_RCC_GPIOA_CLK_ENABLE();

}

我怀疑问题出在ADC和DMA的配置上，在这些配置上我几乎找不到文献。有许多示例1 2 3 4，但是由于它们的代码看起来与我的代码相同，因此无法提供补救措施。

作为对Tarick Welling响应的编辑，在CubeMX中生成代码时，我似乎没有获得完整的软件包。特别是我错过了完整的MX_DMA_Init()，因为我的只会生成以下内容：

static void MX_DMA_Init(void) 
{
  /* DMA controller clock enable */
  __HAL_RCC_DMA2_CLK_ENABLE();

  /* DMA interrupt init */
  /* DMA2_Stream0_IRQn interrupt configuration */
  HAL_NVIC_SetPriority(DMA2_Stream0_IRQn, 0, 0);
  HAL_NVIC_EnableIRQ(DMA2_Stream0_IRQn);
}

尽管如此，尽管我已将CubeMX中的设置配置为可以生成，如下图所示：

CubeMX DMA generation

对于为什么没有在我的CubeMX中生成此代码，而对于其他人来说却显然是，我感到非常困惑。

Answer 1

MX_DMA_Init未初始化hdma_adc1。因此无法使用DMA。

hadc1.Init.DMAContinuousRequests = DISABLE;禁用DMA的连续使用，因此它将是一次快照传输。

uint32_t DMAContinuousRequests; Specify whether the DMA requests are performed in one shot mode (DMA transfer stops when number of conversions is reached) 或在continuous mode (DMA transfer unlimited, whatever number of conversions).中此参数可以设置为ENABLE或DISABLE。注意：在连续模式下，必须在循环模式下配置DMA。否则，当达到DMA缓冲区最大指针时，将触发溢出。

ADC尚未初始化为使用DMA，因此它甚至都不知道要使用它。

typedef struct
{
  ADC_TypeDef                   *Instance;              /*!< Register base address */

  ADC_InitTypeDef               Init;                   /*!< ADC required parameters */

  DMA_HandleTypeDef             *DMA_Handle;            /*!< Pointer DMA Handler */

  HAL_LockTypeDef               Lock;                   /*!< ADC locking object */

  __IO uint32_t                 State;                  /*!< ADC communication state (bitmap of ADC states) */

  __IO uint32_t                 ErrorCode;              /*!< ADC Error code */
}ADC_HandleTypeDef;

DMA_Handle需要初始化以使ADC使用DMA。

这可以通过在DMA Settings选项卡上的ADC配置的Configuration中添加一行来在CubeMX中进行设置：通过选择此DMA传输并在对话框的底部配置其参数，可以设置其他设置。

请注意，ST使用委托初始化的形式。 HAL_ADC_Init调用用户定义的HAL_ADC_MspInit。这是在stm32f4xx_hal_msp.c内部定义的，应将ADC链接到DMA。它应该包含类似于以下内容的行：__HAL_LINKDMA(hadc,DMA_Handle,hdma_adc1);

我无法使用ADC正确配置STM32F411RE DMA

1 个答案: