ADC+DMA using stm32 HAL

sgordon777 · Post by **sgordon777** » Mon Feb 24, 2025 4:54 pm

Hello, I’m attemping to get ADC with DMA working in stm32duino/PIO for a stm32g431KB target on a NUCLEO32 baord… My Strategy has been to contruct the app using the CubeMX designer + CubeMX-IDE, make sure it works in CubeIDE,then move the code (with whatever changes are needed) into an Arduino sketch. I have been succsfull at getting a polled ADC app working in PIO this way, but NOT an ADC+DMA app…

My app simplly DMA's ADC output into a big circular buffer and notifies at buffe_levelr=half and buffer_level=full. The app works perfectly in the STMCubeIDE, but NOT arduino: No notifications fire and only one (wrong) value at buffer[0]. I’ve pasted the arduino code below.

IDE: PlatformIO
API: STM32 HAL
Chip: stm32g431kb
Board: NUCLEO32

Thanks in advance!, Steve

****** sketch ******

Code: Select all

#include <Arduino.h>
#include <stm32g4xx_hal_adc.h>

// objects
ADC_HandleTypeDef hadc1;
DMA_HandleTypeDef hdma_adc1;
UART_HandleTypeDef huart2;

// buffer
#define ADC_BUF_LEN 1024
uint16_t adc_buf[ADC_BUF_LEN];

// proto
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);
void HAL_ADC_MspInit1(ADC_HandleTypeDef* hadc);
void HAL_ADC_MspDeInit1(ADC_HandleTypeDef* hadc);

void setup() {

  Serial.begin(921600);  // WARNING: low value like 115200 cause distorted FOC
  // for timer analysis
  //delay(5000);
  Serial.printf("starting…\n");

  HAL_Init();
  SystemClock_Config();
  MX_GPIO_Init();
  MX_DMA_Init();
  MX_ADC1_Init();
  //MX_USART2_UART_Init();
  // use the MspInit from stm32g4xx_hal_msp.c
  HAL_ADC_MspDeInit(&hadc1);
  HAL_ADC_MspInit1(&hadc1);

  // start DMA
  HAL_ADC_Start_DMA(&hadc1, (uint32_t*)adc_buf, ADC_BUF_LEN);
}

void loop() {
  // display a few values at the start of the buffer
  Serial.printf("bufval = % d, % d, % d, % d, % d, % d, % d, % d\n",
                adc_buf[0], adc_buf[1], adc_buf[2], adc_buf[3], adc_buf[4], adc_buf[5], adc_buf[6], adc_buf[7]);

  delay(10);
}

// {from main.c}************
void SystemClock_Config(void) {
  RCC_OscInitTypeDef RCC_OscInitStruct = {};
  RCC_ClkInitTypeDef RCC_ClkInitStruct = {};

  /** Configure the main internal regulator output voltage
*/
  HAL_PWREx_ControlVoltageScaling(PWR_REGULATOR_VOLTAGE_SCALE1_BOOST);

  /** 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_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 = RCC_PLLM_DIV4;
  RCC_OscInitStruct.PLL.PLLN = 85;
  RCC_OscInitStruct.PLL.PLLP = RCC_PLLP_DIV2;
  RCC_OscInitStruct.PLL.PLLQ = RCC_PLLQ_DIV2;
  RCC_OscInitStruct.PLL.PLLR = RCC_PLLR_DIV2;
  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_ClkInitStruct.SYSCLKSource = RCC_SYSCLKSOURCE_PLLCLK;
  RCC_ClkInitStruct.AHBCLKDivider = RCC_SYSCLK_DIV1;
  RCC_ClkInitStruct.APB1CLKDivider = RCC_HCLK_DIV1;
  RCC_ClkInitStruct.APB2CLKDivider = RCC_HCLK_DIV1;

  if (HAL_RCC_ClockConfig(&RCC_ClkInitStruct, FLASH_LATENCY_4) != HAL_OK) {
    Error_Handler();
  }
}

/**

@brief ADC1 Initialization Function
@param None
@retval None
*/
static void MX_ADC1_Init(void) {
  /* USER CODE BEGIN ADC1_Init 0 */

  /* USER CODE END ADC1_Init 0 */

  ADC_MultiModeTypeDef multimode = {};
  ADC_ChannelConfTypeDef sConfig = {};

  /* USER CODE BEGIN ADC1_Init 1 */

  /* USER CODE END ADC1_Init 1 */

  /** Common config
*/
  hadc1.Instance = ADC1;
  hadc1.Init.ClockPrescaler = ADC_CLOCK_ASYNC_DIV4;
  hadc1.Init.Resolution = ADC_RESOLUTION_12B;
  hadc1.Init.DataAlign = ADC_DATAALIGN_RIGHT;
  hadc1.Init.GainCompensation = 0;
  hadc1.Init.ScanConvMode = ADC_SCAN_DISABLE;
  hadc1.Init.EOCSelection = ADC_EOC_SINGLE_CONV;
  hadc1.Init.LowPowerAutoWait = DISABLE;
  hadc1.Init.ContinuousConvMode = ENABLE;
  hadc1.Init.NbrOfConversion = 1;
  hadc1.Init.DiscontinuousConvMode = DISABLE;
  hadc1.Init.ExternalTrigConv = ADC_SOFTWARE_START;
  hadc1.Init.ExternalTrigConvEdge = ADC_EXTERNALTRIGCONVEDGE_NONE;
  hadc1.Init.DMAContinuousRequests = ENABLE;
  hadc1.Init.Overrun = ADC_OVR_DATA_PRESERVED;
  hadc1.Init.OversamplingMode = DISABLE;
  if (HAL_ADC_Init(&hadc1) != HAL_OK) {
    Error_Handler();
  }

  /** Configure the ADC multi-mode
*/
  multimode.Mode = ADC_MODE_INDEPENDENT;
  if (HAL_ADCEx_MultiModeConfigChannel(&hadc1, &multimode) != HAL_OK) {
    Error_Handler();
  }

  /** Configure Regular Channel
/
sConfig.Channel = ADC_CHANNEL_1;
sConfig.Rank = ADC_REGULAR_RANK_1;
sConfig.SamplingTime = ADC_SAMPLETIME_2CYCLES_5;
sConfig.SingleDiff = ADC_SINGLE_ENDED;
sConfig.OffsetNumber = ADC_OFFSET_NONE;
sConfig.Offset = 0;
if (HAL_ADC_ConfigChannel(&hadc1, &sConfig) != HAL_OK)
{
Error_Handler();
}
/ USER CODE BEGIN ADC1_Init 2 */

  /* USER CODE END ADC1_Init 2 */
}

/**

@brief USART2 Initialization Function
@param None
@retval None
*/
static void MX_USART2_UART_Init(void) {
  /* USER CODE BEGIN USART2_Init 0 */

  /* USER CODE END USART2_Init 0 */

  /* USER CODE BEGIN USART2_Init 1 */

  /* USER CODE END USART2_Init 1 */
  // 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;
  // huart2.Init.OneBitSampling = UART_ONE_BIT_SAMPLE_DISABLE;
  // huart2.Init.ClockPrescaler = UART_PRESCALER_DIV1;
  // huart2.AdvancedInit.AdvFeatureInit = UART_ADVFEATURE_NO_INIT;
  // if (HAL_UART_Init(&huart2) != HAL_OK) {
  //   Error_Handler();
  // }
  // if (HAL_UARTEx_SetTxFifoThreshold(&huart2, UART_TXFIFO_THRESHOLD_1_8) != HAL_OK) {
  //   Error_Handler();
  // }
  // if (HAL_UARTEx_SetRxFifoThreshold(&huart2, UART_RXFIFO_THRESHOLD_1_8) != HAL_OK) {
  //   Error_Handler();
  // }
  // if (HAL_UARTEx_DisableFifoMode(&huart2) != HAL_OK) {
  //   Error_Handler();
  // }
  /* USER CODE BEGIN USART2_Init 2 */

  /* USER CODE END USART2_Init 2 */
}

/**

Enable DMA controller clock
*/
static void MX_DMA_Init(void) {
  /* DMA controller clock enable */
  __HAL_RCC_DMAMUX1_CLK_ENABLE();
  __HAL_RCC_DMA1_CLK_ENABLE();

  /* DMA interrupt init */
  /* DMA1_Channel1_IRQn interrupt configuration */
  HAL_NVIC_SetPriority(DMA1_Channel1_IRQn, 0, 0);
  HAL_NVIC_EnableIRQ(DMA1_Channel1_IRQn);
}

/*
* @brief GPIO Initialization Function
* @param None
* @retval None
**/
static void MX_GPIO_Init(void) {
  GPIO_InitTypeDef GPIO_InitStruct = {};
  /* USER CODE BEGIN MX_GPIO_Init_1 */
  /* USER CODE END MX_GPIO_Init_1 */
  /* GPIO Ports Clock Enable */
  __HAL_RCC_GPIOA_CLK_ENABLE();
  __HAL_RCC_GPIOB_CLK_ENABLE();

  /*Configure GPIO pin Output Level */
  HAL_GPIO_WritePin(GPIOA, GPIO_PIN_10, GPIO_PIN_RESET);

  /*Configure GPIO pin Output Level */
  // HAL_GPIO_WritePin(LD2_GPIO_Port, LD2_Pin, GPIO_PIN_RESET);

  /*Configure GPIO pin : PA10 */
  GPIO_InitStruct.Pin = GPIO_PIN_10;
  GPIO_InitStruct.Mode = GPIO_MODE_OUTPUT_PP;
  GPIO_InitStruct.Pull = GPIO_NOPULL;
  GPIO_InitStruct.Speed = GPIO_SPEED_FREQ_LOW;
  HAL_GPIO_Init(GPIOA, &GPIO_InitStruct);

#if 0
/*Configure GPIO pin : LD2_Pin */
GPIO_InitStruct.Pin = LD2_Pin;
GPIO_InitStruct.Mode = GPIO_MODE_OUTPUT_PP;
GPIO_InitStruct.Pull = GPIO_NOPULL;
GPIO_InitStruct.Speed = GPIO_SPEED_FREQ_LOW;
HAL_GPIO_Init(LD2_GPIO_Port, &GPIO_InitStruct);
#endif

  /* USER CODE BEGIN MX_GPIO_Init_2 */
  /* USER CODE END MX_GPIO_Init_2 */
}

/* USER CODE BEGIN 4 */
void HAL_ADC_ConvHalfCpltCallback(ADC_HandleTypeDef hadc) {
  HAL_GPIO_WritePin(GPIOA, GPIO_PIN_10, GPIO_PIN_SET);
}
void HAL_ADC_ConvCpltCallback(ADC_HandleTypeDef* hadc) {
  HAL_GPIO_WritePin(GPIOA, GPIO_PIN_10, GPIO_PIN_RESET);
}

/* USER CODE END 4 */
#if 0
/**
* @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 */
}
#endif
#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 */
// ********************************************************************************************************
// {from stm32g4xx_hal_msp.c}**********

/**
* @brief ADC MSP Initialization
*        This function configures the hardware resources used in this example
* @param hadc: ADC handle pointer
* @retval None
*/
void HAL_ADC_MspInit1(ADC_HandleTypeDef *hadc) {
  GPIO_InitTypeDef GPIO_InitStruct = {};
  RCC_PeriphCLKInitTypeDef PeriphClkInit = {};
  if (hadc->Instance == ADC1) {
    /* USER CODE BEGIN ADC1_MspInit 0 */

    /* USER CODE END ADC1_MspInit 0 */

    /** Initializes the peripherals clocks
*/
    PeriphClkInit.PeriphClockSelection = RCC_PERIPHCLK_ADC12;
    PeriphClkInit.Adc12ClockSelection = RCC_ADC12CLKSOURCE_SYSCLK;
    if (HAL_RCCEx_PeriphCLKConfig(&PeriphClkInit) != HAL_OK) {
      Error_Handler();
    }

    /* Peripheral clock enable */
    __HAL_RCC_ADC12_CLK_ENABLE();

    __HAL_RCC_GPIOA_CLK_ENABLE();
    /**ADC1 GPIO Configuration
PA0 ------> ADC1_IN1
*/
    GPIO_InitStruct.Pin = GPIO_PIN_0;
    GPIO_InitStruct.Mode = GPIO_MODE_ANALOG;
    GPIO_InitStruct.Pull = GPIO_NOPULL;
    HAL_GPIO_Init(GPIOA, &GPIO_InitStruct);

    /* ADC1 DMA Init /
/ ADC1 Init */
    hdma_adc1.Instance = DMA1_Channel1;
    hdma_adc1.Init.Request = DMA_REQUEST_ADC1;
    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(hadc, DMA_Handle, hdma_adc1);

    /* USER CODE BEGIN ADC1_MspInit 1 */

    /* USER CODE END ADC1_MspInit 1 */
  }
}

/**
* @brief ADC MSP De-Initialization
*        This function freeze the hardware resources used in this example
* @param hadc: ADC handle pointer
* @retval None
*/
void HAL_ADC_MspDeInit1(ADC_HandleTypeDef *hadc) {
  if (hadc->Instance == ADC1) {
    /* USER CODE BEGIN ADC1_MspDeInit 0 */

    /* USER CODE END ADC1_MspDeInit 0 /
/ Peripheral clock disable */
    __HAL_RCC_ADC12_CLK_DISABLE();

    /**ADC1 GPIO Configuration
PA0 ------> ADC1_IN1
*/
    HAL_GPIO_DeInit(GPIOA, GPIO_PIN_0);

    /* ADC1 DMA DeInit */
    HAL_DMA_DeInit(hadc->DMA_Handle);
    /* USER CODE BEGIN ADC1_MspDeInit 1 */

    /* USER CODE END ADC1_MspDeInit 1 */
  }
}

// ********************************************************************************************************

fpiSTM · Post by **fpiSTM** » Tue Feb 25, 2025 8:42 am

Please refer to this example, you will find several advices to properly port your code:
viewtopic.php?t=110

mainly the extern "C" and probably disabling the ADC support by the core.

sgordon777 · Post by **sgordon777** » Sun Mar 02, 2025 9:25 pm

Yes, I looked at that even before I posted my thread. Nothing in that thread helped

ozcar · Post by **ozcar** » Mon Mar 03, 2025 9:30 am

sgordon777 wrote: Sun Mar 02, 2025 9:25 pm Yes, I looked at that even before I posted my thread. Nothing in that thread helped

fpiSTM mentioned extern "C", and the code in the thread pointed to has that on the declarations for HAL_ADC_ConvCpltCallback() and HAL_ADC_ConvHalfCpltCallback(). The code that you posted originally did not have the extern "C" on those, so have you changed that now?

The example there did not show how to override the default system clock config, but if you have to do that, then you need extern "C" on your SystemClock_Config() in your sketch as well. Correctly declared your version of SystemClock_Config() should have been called already by the time your setup() gets entered, so you do not need to call it yourself, nor should you need to call HAL_Init() there.

sgordon777 · Post by **sgordon777** » Wed Mar 05, 2025 1:40 am

Yes, I did try extern "C" on my callback functions, but not on the sysclock function. I'll try that and also verify that it;s entered. Thank you.

sgordon777 · Post by **sgordon777** » Fri Mar 07, 2025 5:40 am

Ok, finally got it running. What was missing was this:

extern "C" void DMA1_Channel1_IRQHandler(void)
{
HAL_DMA_IRQHandler(&hdma_adc1);
}

I'm defining HAL_ADC_MODULE_ONLY in my platform ini file. Thanks for the help

Code: Select all


#include <Arduino.h>
#include <stm32g4xx_hal_adc.h>

// objects
ADC_HandleTypeDef hadc1;
DMA_HandleTypeDef hdma_adc1;
UART_HandleTypeDef huart2;

// buffer
#define ADC_BUF_LEN 256
uint16_t adc_buf[ADC_BUF_LEN];

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);


void setup()
{
  Serial.begin(921600); // WARNING: low value like 115200 cause distorted FOC
  // for timer analysis
  //delay(5000);
  Serial.printf("starting\n");
  HAL_Init();
  SystemClock_Config();
  /* Initialize all configured peripherals */
  MX_GPIO_Init();
  MX_DMA_Init();
  MX_ADC1_Init();
  //MX_USART2_UART_Init();
  HAL_ADC_Start_DMA(&hadc1, (uint32_t*)adc_buf, ADC_BUF_LEN );

}

void loop()
{
  Serial.printf("%d,%d,%d,%d,%d,%d,%d,%d\n", 
    adc_buf[ADC_BUF_LEN>>8], adc_buf[ADC_BUF_LEN>>7], adc_buf[ADC_BUF_LEN>>6], adc_buf[ADC_BUF_LEN>>5], 
    adc_buf[ADC_BUF_LEN>>4], adc_buf[ADC_BUF_LEN>>3], adc_buf[ADC_BUF_LEN>>2], adc_buf[ADC_BUF_LEN>>1]);
  delay(250);

}



void SystemClock_Config(void)
{
  RCC_OscInitTypeDef RCC_OscInitStruct = {0};
  RCC_ClkInitTypeDef RCC_ClkInitStruct = {0};

  /** Configure the main internal regulator output voltage
  */
  HAL_PWREx_ControlVoltageScaling(PWR_REGULATOR_VOLTAGE_SCALE1_BOOST);

  /** 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_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 = RCC_PLLM_DIV4;
  RCC_OscInitStruct.PLL.PLLN = 85;
  RCC_OscInitStruct.PLL.PLLP = RCC_PLLP_DIV2;
  RCC_OscInitStruct.PLL.PLLQ = RCC_PLLQ_DIV2;
  RCC_OscInitStruct.PLL.PLLR = RCC_PLLR_DIV2;
  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_ClkInitStruct.SYSCLKSource = RCC_SYSCLKSOURCE_PLLCLK;
  RCC_ClkInitStruct.AHBCLKDivider = RCC_SYSCLK_DIV1;
  RCC_ClkInitStruct.APB1CLKDivider = RCC_HCLK_DIV1;
  RCC_ClkInitStruct.APB2CLKDivider = RCC_HCLK_DIV1;

  if (HAL_RCC_ClockConfig(&RCC_ClkInitStruct, FLASH_LATENCY_4) != HAL_OK)
  {
    Error_Handler();
  }
}

/**
  * @brief ADC1 Initialization Function
  * @param None
  * @retval None
  */
static void MX_ADC1_Init(void)
{

  /* USER CODE BEGIN ADC1_Init 0 */

  /* USER CODE END ADC1_Init 0 */

  ADC_MultiModeTypeDef multimode = {0};
  ADC_ChannelConfTypeDef sConfig = {0};

  /* USER CODE BEGIN ADC1_Init 1 */

  /* USER CODE END ADC1_Init 1 */

  /** Common config
  */
  hadc1.Instance = ADC1;
  hadc1.Init.ClockPrescaler = ADC_CLOCK_ASYNC_DIV4;
  hadc1.Init.Resolution = ADC_RESOLUTION_12B;
  hadc1.Init.DataAlign = ADC_DATAALIGN_RIGHT;
  hadc1.Init.GainCompensation = 0;
  hadc1.Init.ScanConvMode = ADC_SCAN_DISABLE;
  hadc1.Init.EOCSelection = ADC_EOC_SINGLE_CONV;
  hadc1.Init.LowPowerAutoWait = DISABLE;
  hadc1.Init.ContinuousConvMode = ENABLE;
  hadc1.Init.NbrOfConversion = 1;
  hadc1.Init.DiscontinuousConvMode = DISABLE;
  hadc1.Init.ExternalTrigConv = ADC_SOFTWARE_START;
  hadc1.Init.ExternalTrigConvEdge = ADC_EXTERNALTRIGCONVEDGE_NONE;
  hadc1.Init.DMAContinuousRequests = ENABLE;
  hadc1.Init.Overrun = ADC_OVR_DATA_PRESERVED;
  hadc1.Init.OversamplingMode = DISABLE;
  if (HAL_ADC_Init(&hadc1) != HAL_OK)
  {
    Error_Handler();
  }

  /** Configure the ADC multi-mode
  */
  multimode.Mode = ADC_MODE_INDEPENDENT;
  if (HAL_ADCEx_MultiModeConfigChannel(&hadc1, &multimode) != HAL_OK)
  {
    Error_Handler();
  }

  /** Configure Regular Channel
  */
  sConfig.Channel = ADC_CHANNEL_1;
  sConfig.Rank = ADC_REGULAR_RANK_1;
  sConfig.SamplingTime = ADC_SAMPLETIME_2CYCLES_5;
  sConfig.SingleDiff = ADC_SINGLE_ENDED;
  sConfig.OffsetNumber = ADC_OFFSET_NONE;
  sConfig.Offset = 0;
  if (HAL_ADC_ConfigChannel(&hadc1, &sConfig) != HAL_OK)
  {
    Error_Handler();
  }
  /* USER CODE BEGIN ADC1_Init 2 */

  /* USER CODE END ADC1_Init 2 */

}

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

  /* USER CODE BEGIN USART2_Init 0 */

  /* USER CODE END USART2_Init 0 */

  /* USER CODE BEGIN USART2_Init 1 */

  /* USER CODE END USART2_Init 1 */
  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;
  huart2.Init.OneBitSampling = UART_ONE_BIT_SAMPLE_DISABLE;
  huart2.Init.ClockPrescaler = UART_PRESCALER_DIV1;
  huart2.AdvancedInit.AdvFeatureInit = UART_ADVFEATURE_NO_INIT;
  if (HAL_UART_Init(&huart2) != HAL_OK)
  {
    Error_Handler();
  }
  if (HAL_UARTEx_SetTxFifoThreshold(&huart2, UART_TXFIFO_THRESHOLD_1_8) != HAL_OK)
  {
    Error_Handler();
  }
  if (HAL_UARTEx_SetRxFifoThreshold(&huart2, UART_RXFIFO_THRESHOLD_1_8) != HAL_OK)
  {
    Error_Handler();
  }
  if (HAL_UARTEx_DisableFifoMode(&huart2) != HAL_OK)
  {
    Error_Handler();
  }
  /* USER CODE BEGIN USART2_Init 2 */

  /* USER CODE END USART2_Init 2 */

}

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

  /* DMA controller clock enable */
  __HAL_RCC_DMAMUX1_CLK_ENABLE();
  __HAL_RCC_DMA1_CLK_ENABLE();

  /* DMA interrupt init */
  /* DMA1_Channel1_IRQn interrupt configuration */
  HAL_NVIC_SetPriority(DMA1_Channel1_IRQn, 0, 0);
  HAL_NVIC_EnableIRQ(DMA1_Channel1_IRQn);

}

/**
  * @brief GPIO Initialization Function
  * @param None
  * @retval None
  */
static void MX_GPIO_Init(void)
{
  GPIO_InitTypeDef GPIO_InitStruct = {0};
/* USER CODE BEGIN MX_GPIO_Init_1 */
/* USER CODE END MX_GPIO_Init_1 */

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

  /*Configure GPIO pin Output Level */
  HAL_GPIO_WritePin(GPIOA, GPIO_PIN_10, GPIO_PIN_RESET);

  /*Configure GPIO pin : PA10 */
  GPIO_InitStruct.Pin = GPIO_PIN_10;
  GPIO_InitStruct.Mode = GPIO_MODE_OUTPUT_PP;
  GPIO_InitStruct.Pull = GPIO_NOPULL;
  GPIO_InitStruct.Speed = GPIO_SPEED_FREQ_LOW;
  HAL_GPIO_Init(GPIOA, &GPIO_InitStruct);

/* USER CODE BEGIN MX_GPIO_Init_2 */
/* USER CODE END MX_GPIO_Init_2 */
}

/* USER CODE BEGIN 4 */
extern "C" void HAL_ADC_ConvHalfCpltCallback(ADC_HandleTypeDef* hadc)
{
	HAL_GPIO_WritePin(GPIOA, GPIO_PIN_10, GPIO_PIN_SET);
}
extern "C" void HAL_ADC_ConvCpltCallback(ADC_HandleTypeDef* hadc)
{
	HAL_GPIO_WritePin(GPIOA, GPIO_PIN_10, GPIO_PIN_RESET);
}



extern "C" void HAL_ADC_MspInit(ADC_HandleTypeDef* hadc)
{
 
  Serial.printf("MSP_INIT\n");

  GPIO_InitTypeDef GPIO_InitStruct = {0};
  RCC_PeriphCLKInitTypeDef PeriphClkInit = {0};
  if(hadc->Instance==ADC1)
  {
  /* USER CODE BEGIN ADC1_MspInit 0 */

  /* USER CODE END ADC1_MspInit 0 */

  /** Initializes the peripherals clocks
  */
    PeriphClkInit.PeriphClockSelection = RCC_PERIPHCLK_ADC12;
    PeriphClkInit.Adc12ClockSelection = RCC_ADC12CLKSOURCE_SYSCLK;
    if (HAL_RCCEx_PeriphCLKConfig(&PeriphClkInit) != HAL_OK)
    {
      Error_Handler();
    }

    /* Peripheral clock enable */
    __HAL_RCC_ADC12_CLK_ENABLE();

    __HAL_RCC_GPIOA_CLK_ENABLE();
    /**ADC1 GPIO Configuration
    PA0     ------> ADC1_IN1
    */
    GPIO_InitStruct.Pin = GPIO_PIN_0;
    GPIO_InitStruct.Mode = GPIO_MODE_ANALOG;
    GPIO_InitStruct.Pull = GPIO_NOPULL;
    HAL_GPIO_Init(GPIOA, &GPIO_InitStruct);

    /* ADC1 DMA Init */
    /* ADC1 Init */
    hdma_adc1.Instance = DMA1_Channel1;
    hdma_adc1.Init.Request = DMA_REQUEST_ADC1;
    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(hadc,DMA_Handle,hdma_adc1);

  /* USER CODE BEGIN ADC1_MspInit 1 */

  /* USER CODE END ADC1_MspInit 1 */
  }

}


extern "C" void DMA1_Channel1_IRQHandler(void)
{
  /* USER CODE BEGIN DMA1_Channel1_IRQn 0 */

  /* USER CODE END DMA1_Channel1_IRQn 0 */
  HAL_DMA_IRQHandler(&hdma_adc1);
  /* USER CODE BEGIN DMA1_Channel1_IRQn 1 */

  /* USER CODE END DMA1_Channel1_IRQn 1 */
}


#if 0
extern "C" void SystemInit(void)
{


//  Serial.printf("SystemInit\n");

  /* FPU settings ------------------------------------------------------------*/
  #if (__FPU_PRESENT == 1) && (__FPU_USED == 1)
    SCB->CPACR |= ((3UL << (10*2))|(3UL << (11*2)));  /* set CP10 and CP11 Full Access */
  #endif

  /* Configure the Vector Table location add offset address ------------------*/
#if defined(USER_VECT_TAB_ADDRESS)
  SCB->VTOR = VECT_TAB_BASE_ADDRESS | VECT_TAB_OFFSET; /* Vector Table Relocation in Internal SRAM */
#endif /* USER_VECT_TAB_ADDRESS */
}

extern "C" void SystemCoreClockUpdate(void)
{
  uint32_t tmp, pllvco, pllr, pllsource, pllm;

  Serial.printf("SystemCoreClockUpdate\n");


  /* Get SYSCLK source -------------------------------------------------------*/
  switch (RCC->CFGR & RCC_CFGR_SWS)
  {
    case 0x04:  /* HSI used as system clock source */
      SystemCoreClock = HSI_VALUE;
      break;

    case 0x08:  /* HSE used as system clock source */
      SystemCoreClock = HSE_VALUE;
      break;

    case 0x0C:  /* PLL used as system clock  source */
      /* PLL_VCO = (HSE_VALUE or HSI_VALUE / PLLM) * PLLN
         SYSCLK = PLL_VCO / PLLR
         */
      pllsource = (RCC->PLLCFGR & RCC_PLLCFGR_PLLSRC);
      pllm = ((RCC->PLLCFGR & RCC_PLLCFGR_PLLM) >> 4) + 1U ;
      if (pllsource == 0x02UL) /* HSI used as PLL clock source */
      {
        pllvco = (HSI_VALUE / pllm);
      }
      else                   /* HSE used as PLL clock source */
      {
        pllvco = (HSE_VALUE / pllm);
      }
      pllvco = pllvco * ((RCC->PLLCFGR & RCC_PLLCFGR_PLLN) >> 8);
      pllr = (((RCC->PLLCFGR & RCC_PLLCFGR_PLLR) >> 25) + 1U) * 2U;
      SystemCoreClock = pllvco/pllr;
      break;

    default:
      break;
  }
  /* Compute HCLK clock frequency --------------------------------------------*/
  /* Get HCLK prescaler */
  tmp = AHBPrescTable[((RCC->CFGR & RCC_CFGR_HPRE) >> 4)];
  /* HCLK clock frequency */
  SystemCoreClock >>= tmp;
}
#endif

fpiSTM · Post by **fpiSTM** » Fri Mar 07, 2025 6:34 am

Without the handler it could not work

In the other topic it was set.

Arduino for STM32

ADC+DMA using stm32 HAL

ADC+DMA using stm32 HAL

Re: ADC+DMA using stm32 HAL

Re: ADC+DMA using stm32 HAL

Re: ADC+DMA using stm32 HAL

Re: ADC+DMA using stm32 HAL

Re: ADC+DMA using stm32 HAL

Re: ADC+DMA using stm32 HAL