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 */

 

[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();
 }