cubeide NucleoH723ZG ADC callback not working with DMA

[DG91]

Hello,

I am trying to read from ADC with DMA using HAL_ADC_Start_DMA.
Only with ADC I can read and printf the values. But once I configure DMA it seems that callback isn't working.

I am attaching the main.c as well as the whole project zipped. Is there anything else needed or any other way to utilize DMA for ADC? Would there be a possiibility that the library for HAL_ADC_ConvCpltCallback() not be working?

Please, any suggestions would be really appreciated. Thank you

/* USER CODE BEGIN Header */
/**
  ******************************************************************************
  * @file           : main.c
  * @brief          : Main program body
  ******************************************************************************
  * @attention
  *
  * Copyright (c) 2025 STMicroelectronics.
  * All rights reserved.
  *
  * This software is licensed under terms that can be found in the LICENSE file
  * in the root directory of this software component.
  * If no LICENSE file comes with this software, it is provided AS-IS.
  *
  ******************************************************************************
  */
/* USER CODE END Header */
/* Includes ------------------------------------------------------------------*/
#include "main.h"
#include "adc.h"
#include "dma.h"
#include "i2c.h"
#include "memorymap.h"
#include "gpio.h"

/* Private includes ----------------------------------------------------------*/
/* USER CODE BEGIN Includes */

/* USER CODE END Includes */

/* Private typedef -----------------------------------------------------------*/
/* USER CODE BEGIN PTD */

/* USER CODE END PTD */

/* Private define ------------------------------------------------------------*/
/* USER CODE BEGIN PD */

/* USER CODE END PD */

/* Private macro -------------------------------------------------------------*/
/* USER CODE BEGIN PM */

/* USER CODE END PM */

/* Private variables ---------------------------------------------------------*/

COM_InitTypeDef BspCOMInit;

/* USER CODE BEGIN PV */

/* USER CODE END PV */

/* Private function prototypes -----------------------------------------------*/
void SystemClock_Config(void);
static void MPU_Config(void);
/* USER CODE BEGIN PFP */

/* USER CODE END PFP */

/* Private user code ---------------------------------------------------------*/
/* USER CODE BEGIN 0 */
#define ADC_BUFFER_SIZE 1
uint32_t adc_value = 0;
void HAL_ADC_ConvCpltCallback(ADC_HandleTypeDef *hadc)
{
    if (hadc->Instance == ADC1)
    {
        // Print ADC value via UART
    	BSP_LED_Toggle(LED3);
        printf("ADC Value: %d\r\n", (int)adc_value);
        // Restart ADC for next conversion
        HAL_ADC_Start_DMA(&hadc1, &adc_value, ADC_BUFFER_SIZE);
    }
}
/* USER CODE END 0 */

/**
  * @brief  The application entry point.
  * @retval int
  */
int main(void)
{

  /* USER CODE BEGIN 1 */

  /* USER CODE END 1 */

  /* MPU Configuration--------------------------------------------------------*/
  MPU_Config();

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

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

  /* USER CODE BEGIN Init */

  /* USER CODE END Init */

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

  /* USER CODE BEGIN SysInit */

  /* USER CODE END SysInit */

  /* Initialize all configured peripherals */
  MX_GPIO_Init();
  MX_DMA_Init();
  MX_ADC1_Init();
  MX_I2C1_Init();
  /* USER CODE BEGIN 2 */

  /* USER CODE END 2 */

  /* Initialize leds */
  BSP_LED_Init(LED_GREEN);
  BSP_LED_Init(LED_YELLOW);
  BSP_LED_Init(LED_RED);

  /* Initialize USER push-button, will be used to trigger an interrupt each time it's pressed.*/
  BSP_PB_Init(BUTTON_USER, BUTTON_MODE_EXTI);

  /* Initialize COM1 port (115200, 8 bits (7-bit data + 1 stop bit), no parity */
  BspCOMInit.BaudRate   = 115200;
  BspCOMInit.WordLength = COM_WORDLENGTH_8B;
  BspCOMInit.StopBits   = COM_STOPBITS_1;
  BspCOMInit.Parity     = COM_PARITY_NONE;
  BspCOMInit.HwFlowCtl  = COM_HWCONTROL_NONE;
  if (BSP_COM_Init(COM1, &BspCOMInit) != BSP_ERROR_NONE)
  {
    Error_Handler();
  }

  /* Infinite loop */
  /* USER CODE BEGIN WHILE */
  printf("Hello\r\n");
  HAL_ADC_Start_DMA(&hadc1, &adc_value, ADC_BUFFER_SIZE);
  while (1)
  {
    /* USER CODE END WHILE */

    /* USER CODE BEGIN 3 */
	 //BSP_LED_Toggle(LED3);
	 HAL_Delay(100);
  }
  /* USER CODE END 3 */
}

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

  /** Supply configuration update enable
  */
  HAL_PWREx_ConfigSupply(PWR_LDO_SUPPLY);

  /** Configure the main internal regulator output voltage
  */
  __HAL_PWR_VOLTAGESCALING_CONFIG(PWR_REGULATOR_VOLTAGE_SCALE0);

  while(!__HAL_PWR_GET_FLAG(PWR_FLAG_VOSRDY)) {}

  /** Initializes the RCC Oscillators according to the specified parameters
  * in the RCC_OscInitTypeDef structure.
  */
  RCC_OscInitStruct.OscillatorType = RCC_OSCILLATORTYPE_HSI;
  RCC_OscInitStruct.HSIState = RCC_HSI_DIV1;
  RCC_OscInitStruct.HSICalibrationValue = 64;
  RCC_OscInitStruct.PLL.PLLState = RCC_PLL_ON;
  RCC_OscInitStruct.PLL.PLLSource = RCC_PLLSOURCE_HSI;
  RCC_OscInitStruct.PLL.PLLM = 4;
  RCC_OscInitStruct.PLL.PLLN = 34;
  RCC_OscInitStruct.PLL.PLLP = 1;
  RCC_OscInitStruct.PLL.PLLQ = 4;
  RCC_OscInitStruct.PLL.PLLR = 2;
  RCC_OscInitStruct.PLL.PLLRGE = RCC_PLL1VCIRANGE_3;
  RCC_OscInitStruct.PLL.PLLVCOSEL = RCC_PLL1VCOWIDE;
  RCC_OscInitStruct.PLL.PLLFRACN = 3072;
  if (HAL_RCC_OscConfig(&RCC_OscInitStruct) != HAL_OK)
  {
    Error_Handler();
  }

  /** Initializes the CPU, AHB and APB buses clocks
  */
  RCC_ClkInitStruct.ClockType = RCC_CLOCKTYPE_HCLK|RCC_CLOCKTYPE_SYSCLK
                              |RCC_CLOCKTYPE_PCLK1|RCC_CLOCKTYPE_PCLK2
                              |RCC_CLOCKTYPE_D3PCLK1|RCC_CLOCKTYPE_D1PCLK1;
  RCC_ClkInitStruct.SYSCLKSource = RCC_SYSCLKSOURCE_PLLCLK;
  RCC_ClkInitStruct.SYSCLKDivider = RCC_SYSCLK_DIV1;
  RCC_ClkInitStruct.AHBCLKDivider = RCC_HCLK_DIV2;
  RCC_ClkInitStruct.APB3CLKDivider = RCC_APB3_DIV2;
  RCC_ClkInitStruct.APB1CLKDivider = RCC_APB1_DIV2;
  RCC_ClkInitStruct.APB2CLKDivider = RCC_APB2_DIV2;
  RCC_ClkInitStruct.APB4CLKDivider = RCC_APB4_DIV2;

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

/* USER CODE BEGIN 4 */

/* USER CODE END 4 */

 /* MPU Configuration */

void MPU_Config(void)
{
  MPU_Region_InitTypeDef MPU_InitStruct = {0};

  /* Disables the MPU */
  HAL_MPU_Disable();

  /** Initializes and configures the Region and the memory to be protected
  */
  MPU_InitStruct.Enable = MPU_REGION_ENABLE;
  MPU_InitStruct.Number = MPU_REGION_NUMBER0;
  MPU_InitStruct.BaseAddress = 0x0;
  MPU_InitStruct.Size = MPU_REGION_SIZE_4GB;
  MPU_InitStruct.SubRegionDisable = 0x87;
  MPU_InitStruct.TypeExtField = MPU_TEX_LEVEL0;
  MPU_InitStruct.AccessPermission = MPU_REGION_NO_ACCESS;
  MPU_InitStruct.DisableExec = MPU_INSTRUCTION_ACCESS_DISABLE;
  MPU_InitStruct.IsShareable = MPU_ACCESS_SHAREABLE;
  MPU_InitStruct.IsCacheable = MPU_ACCESS_NOT_CACHEABLE;
  MPU_InitStruct.IsBufferable = MPU_ACCESS_NOT_BUFFERABLE;

  HAL_MPU_ConfigRegion(&MPU_InitStruct);
  /* Enables the MPU */
  HAL_MPU_Enable(MPU_PRIVILEGED_DEFAULT);

}

/**
  * @brief  This function is executed in case of error occurrence.
  * @retval None
  */
void Error_Handler(void)
{
  /* USER CODE BEGIN Error_Handler_Debug */
  /* User can add his own implementation to report the HAL error return state */
  __disable_irq();
  while (1)
  {
  }
  /* USER CODE END Error_Handler_Debug */
}

#ifdef  USE_FULL_ASSERT
/**
  * @brief  Reports the name of the source file and the source line number
  *         where the assert_param error has occurred.
  * @PAram  file: pointer to the source file name
  * @PAram  line: assert_param error line source number
  * @retval None
  */
void assert_failed(uint8_t *file, uint32_t line)
{
  /* USER CODE BEGIN 6 */
  /* User can add his own implementation to report the file name and line number,
     ex: printf("Wrong parameters value: file %s on line %d\r\n", file, line) */
  /* USER CODE END 6 */
}
#endif /* USE_FULL_ASSERT */

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[AScha.3]

Hi,

you have callback enabled in Cube?

-->

[DG91]

Dear @AScha.3 
thank you for your reply, yes it is activated.

I am attaching a respective screenshot.

Any suggestions would be really helpful. Thank you

[AScha.3]

Ok,

and how/where you start the ADC ?

I see only DMA is started.

btw

Can you explain, whats the sense of using the DMA, to just transfer one value ?

[Saket_Om]

Hello @DG91 

Please refer to the example  Projects/NUCLEO-H743ZI/Examples/ADC/ADC_DMA_Transfer in the STM32Cube firmware h7.

To read analogue input and get the result by DMA, these steps are required:

• De-Initialize ADC peripheral
• Initialize ADC peripheral
• Start calibration
• Channel configuration
• Start conversion in DMA mode

Please look to the snippet code below: 

  /* ### - 1 - Initialize ADC peripheral #################################### */
  AdcHandle.Instance          = ADCx;
  if (HAL_ADC_DeInit(&AdcHandle) != HAL_OK)
  {
    /* ADC de-initialization Error */
    Error_Handler();
  }

  AdcHandle.Init.ClockPrescaler           = ADC_CLOCK_ASYNC_DIV2;          /* Asynchronous clock mode, input ADC clock divided by 2*/
  AdcHandle.Init.Resolution               = ADC_RESOLUTION_16B;            /* 16-bit resolution for converted data */
  AdcHandle.Init.ScanConvMode             = DISABLE;                       /* Sequencer disabled (ADC conversion on only 1 channel: channel set on rank 1) */
  AdcHandle.Init.EOCSelection             = ADC_EOC_SINGLE_CONV;           /* EOC flag picked-up to indicate conversion end */
  AdcHandle.Init.LowPowerAutoWait         = DISABLE;                       /* Auto-delayed conversion feature disabled */
  AdcHandle.Init.ContinuousConvMode       = ENABLE;                        /* Continuous mode enabled (automatic conversion restart after each conversion) */
  AdcHandle.Init.NbrOfConversion          = 1;                             /* Parameter discarded because sequencer is disabled */
  AdcHandle.Init.DiscontinuousConvMode    = DISABLE;                       /* Parameter discarded because sequencer is disabled */
  AdcHandle.Init.NbrOfDiscConversion      = 1;                             /* Parameter discarded because sequencer is disabled */
  AdcHandle.Init.ExternalTrigConv         = ADC_SOFTWARE_START;            /* Software start to trig the 1st conversion manually, without external event */
  AdcHandle.Init.ExternalTrigConvEdge     = ADC_EXTERNALTRIGCONVEDGE_NONE; /* Parameter discarded because software trigger chosen */
  AdcHandle.Init.ConversionDataManagement = ADC_CONVERSIONDATA_DMA_CIRCULAR; /* ADC DMA circular requested */
  AdcHandle.Init.Overrun                  = ADC_OVR_DATA_OVERWRITTEN;      /* DR register is overwritten with the last conversion result in case of overrun */
  AdcHandle.Init.OversamplingMode         = DISABLE;                       /* No oversampling */
  /* Initialize ADC peripheral according to the passed parameters */
  if (HAL_ADC_Init(&AdcHandle) != HAL_OK)
  {
    Error_Handler();
  }


  /* ### - 2 - Start calibration ############################################ */
  if (HAL_ADCEx_Calibration_Start(&AdcHandle, ADC_CALIB_OFFSET_LINEARITY, ADC_SINGLE_ENDED) != HAL_OK)
  {
    Error_Handler();
  }

  /* ### - 3 - Channel configuration ######################################## */
  sConfig.Channel      = ADCx_CHANNEL;                /* Sampled channel number */
  sConfig.Rank         = ADC_REGULAR_RANK_1;          /* Rank of sampled channel number ADCx_CHANNEL */
  sConfig.SamplingTime = ADC_SAMPLETIME_8CYCLES_5;   /* Sampling time (number of clock cycles unit) */
  sConfig.SingleDiff   = ADC_SINGLE_ENDED;            /* Single-ended input channel */
  sConfig.OffsetNumber = ADC_OFFSET_NONE;             /* No offset subtraction */
  sConfig.Offset = 0;                                 /* Parameter discarded because offset correction is disabled */
  if (HAL_ADC_ConfigChannel(&AdcHandle, &sConfig) != HAL_OK)
  {
    Error_Handler();
  }

  /* ### - 4 - Start conversion in DMA mode ################################# */
  if (HAL_ADC_Start_DMA(&AdcHandle,
                        (uint32_t *)aADCxConvertedData,
                        ADC_CONVERTED_DATA_BUFFER_SIZE
                       ) != HAL_OK)
  {
    Error_Handler();
  }

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