DMA stops working when I enable IWDG STM32F030F4P6

[EduPereira]

DMA stops working when I enable IWDG in .ioc on my STM32, even when commenting out the IWDG initialization for testing.

DMA stops working when I enable IWDG in .ioc on my STM32, even when commenting out the IWDG initialization for testing.

Before enabling IWDG, DMA is functioning normally.

If anyone can help me, I don't have much experience with stm32, I'm just starting out.

/* USER CODE END Header */

/* Includes ------------------------------------------------------------------*/

#include "main.h"



/* Private includes ----------------------------------------------------------*/

/* USER CODE BEGIN Includes */

#include <stdio.h>

#include <string.h>



#include "microwave_sensor.h"

/* USER CODE END Includes */



/* Private define ------------------------------------------------------------*/

/* USER CODE BEGIN PD */

#define ADC_CHANNELS 2

/* USER CODE END PD */



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

ADC_HandleTypeDef hadc;

DMA_HandleTypeDef hdma_adc;

IWDG_HandleTypeDef hiwdg;

UART_HandleTypeDef huart1;

/* USER CODE BEGIN PV */

uint16_t adc_buffer[ADC_CHANNELS];

/* USER CODE END PV */



/* Private function prototypes -----------------------------------------------*/

void SystemClock_Config(void);

static void MX_GPIO_Init(void);

static void MX_DMA_Init(void);

static void MX_ADC_Init(void);

static void MX_USART1_UART_Init(void);

static void MX_IWDG_Init(void);



int main(void)

{



HAL_Init();

SystemClock_Config();

MX_GPIO_Init();

MX_DMA_Init();

MX_ADC_Init();

MX_USART1_UART_Init();

//MX_IWDG_Init();

HAL_ADCEx_Calibration_Start(&hadc);

HAL_ADC_Start_DMA(&hadc, (uint32_t*)adc_buffer, ADC_CHANNELS);

MicrowaveSensor_Init();

while (1)

{

Read_trimpot();

MicrowaveSensor_Config();

MicrowaveSensor_Read();

HAL_Delay(10); // Atualiza a cada 0,5s

}

}



void SystemClock_Config(void)

{

RCC_OscInitTypeDef RCC_OscInitStruct = {0};

RCC_ClkInitTypeDef RCC_ClkInitStruct = {0};

RCC_PeriphCLKInitTypeDef PeriphClkInit = {0};



/** Initializes the RCC Oscillators according to the specified parameters

* in the RCC_OscInitTypeDef structure.

*/

RCC_OscInitStruct.OscillatorType = RCC_OSCILLATORTYPE_HSI|RCC_OSCILLATORTYPE_HSI14

|RCC_OSCILLATORTYPE_LSI;

RCC_OscInitStruct.HSIState = RCC_HSI_ON;

RCC_OscInitStruct.HSI14State = RCC_HSI14_ON;

RCC_OscInitStruct.HSICalibrationValue = RCC_HSICALIBRATION_DEFAULT;

RCC_OscInitStruct.HSI14CalibrationValue = 16;

RCC_OscInitStruct.LSIState = RCC_LSI_ON;

RCC_OscInitStruct.PLL.PLLState = RCC_PLL_NONE;

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_ClkInitStruct.SYSCLKSource = RCC_SYSCLKSOURCE_HSI;

RCC_ClkInitStruct.AHBCLKDivider = RCC_SYSCLK_DIV1;

RCC_ClkInitStruct.APB1CLKDivider = RCC_HCLK_DIV1;



if (HAL_RCC_ClockConfig(&RCC_ClkInitStruct, FLASH_LATENCY_0) != HAL_OK)

{

Error_Handler();

}

PeriphClkInit.PeriphClockSelection = RCC_PERIPHCLK_USART1;

PeriphClkInit.Usart1ClockSelection = RCC_USART1CLKSOURCE_PCLK1;

if (HAL_RCCEx_PeriphCLKConfig(&PeriphClkInit) != HAL_OK)

{

Error_Handler();

}

}



static void MX_ADC_Init(void)

{



/* USER CODE BEGIN ADC_Init 0 */



/* USER CODE END ADC_Init 0 */



ADC_ChannelConfTypeDef sConfig = {0};



/* USER CODE BEGIN ADC_Init 1 */



/* USER CODE END ADC_Init 1 */



/** Configure the global features of the ADC (Clock, Resolution, Data Alignment and number of conversion)

*/

hadc.Instance = ADC1;

hadc.Init.ClockPrescaler = ADC_CLOCK_ASYNC_DIV1;

hadc.Init.Resolution = ADC_RESOLUTION_12B;

hadc.Init.DataAlign = ADC_DATAALIGN_RIGHT;

hadc.Init.ScanConvMode = ADC_SCAN_DIRECTION_FORWARD;

hadc.Init.EOCSelection = ADC_EOC_SINGLE_CONV;

hadc.Init.LowPowerAutoWait = DISABLE;

hadc.Init.LowPowerAutoPowerOff = DISABLE;

hadc.Init.ContinuousConvMode = ENABLE;

hadc.Init.DiscontinuousConvMode = DISABLE;

hadc.Init.ExternalTrigConv = ADC_SOFTWARE_START;

hadc.Init.ExternalTrigConvEdge = ADC_EXTERNALTRIGCONVEDGE_NONE;

hadc.Init.DMAContinuousRequests = DISABLE;

hadc.Init.Overrun = ADC_OVR_DATA_PRESERVED;

if (HAL_ADC_Init(&hadc) != HAL_OK)

{

Error_Handler();

}



/** Configure for the selected ADC regular channel to be converted.

*/

sConfig.Channel = ADC_CHANNEL_0;

sConfig.Rank = ADC_RANK_CHANNEL_NUMBER;

sConfig.SamplingTime = ADC_SAMPLETIME_239CYCLES_5;

if (HAL_ADC_ConfigChannel(&hadc, &sConfig) != HAL_OK)

{

Error_Handler();

}



/** Configure for the selected ADC regular channel to be converted.

*/

sConfig.Channel = ADC_CHANNEL_1;

if (HAL_ADC_ConfigChannel(&hadc, &sConfig) != HAL_OK)

{

Error_Handler();

}

/* USER CODE BEGIN ADC_Init 2 */



/* USER CODE END ADC_Init 2 */



}



static void MX_IWDG_Init(void)

{



/* USER CODE BEGIN IWDG_Init 0 */



/* USER CODE END IWDG_Init 0 */



/* USER CODE BEGIN IWDG_Init 1 */



/* USER CODE END IWDG_Init 1 */

hiwdg.Instance = IWDG;

hiwdg.Init.Prescaler = IWDG_PRESCALER_4;

hiwdg.Init.Window = 4095;

hiwdg.Init.Reload = 4095;

if (HAL_IWDG_Init(&hiwdg) != HAL_OK)

{

Error_Handler();

}

/* USER CODE BEGIN IWDG_Init 2 */



/* USER CODE END IWDG_Init 2 */



}



static void MX_USART1_UART_Init(void)

{



/* USER CODE BEGIN USART1_Init 0 */

/* USER CODE END USART1_Init 0 */



/* USER CODE BEGIN USART1_Init 1 */

/* USER CODE END USART1_Init 1 */

huart1.Instance = USART1;

huart1.Init.BaudRate = 115200;

huart1.Init.WordLength = UART_WORDLENGTH_8B;

huart1.Init.StopBits = UART_STOPBITS_1;

huart1.Init.Parity = UART_PARITY_NONE;

huart1.Init.Mode = UART_MODE_TX_RX;

huart1.Init.HwFlowCtl = UART_HWCONTROL_NONE;

huart1.Init.OverSampling = UART_OVERSAMPLING_16;

huart1.Init.OneBitSampling = UART_ONE_BIT_SAMPLE_DISABLE;

huart1.AdvancedInit.AdvFeatureInit = UART_ADVFEATURE_NO_INIT;

if (HAL_UART_Init(&huart1) != HAL_OK)

{

Error_Handler();

}

/* USER CODE BEGIN USART1_Init 2 */

/* USER CODE END USART1_Init 2 */



}



/**

* Enable DMA controller clock

*/

static void MX_DMA_Init(void)

{



/* DMA controller clock 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);



}



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_5, GPIO_PIN_RESET);



/*Configure GPIO pin : PA5 */

GPIO_InitStruct.Pin = GPIO_PIN_5;

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);



/*Configure GPIO pin : PB1 */

GPIO_InitStruct.Pin = GPIO_PIN_1;

GPIO_InitStruct.Mode = GPIO_MODE_INPUT;

GPIO_InitStruct.Pull = GPIO_PULLDOWN;

HAL_GPIO_Init(GPIOB, &GPIO_InitStruct);



/* USER CODE BEGIN MX_GPIO_Init_2 */

/* USER CODE END MX_GPIO_Init_2 */

}



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 */

Edited by ST Moderator to apply source code formatting and add the appropriate labels.

[Imen.D]

Hello @EduPereira ,

I advise you to debug your project and check the RCC and DMA registers after enabling IWDG to confirm DMA is still enabled.

Check if DMA is initialized after system reset.

You can refer to the IWDG example and test it:

STM32CubeF0/Projects/STM32F0308-Discovery/Examples/IWDG at master · STMicroelectronics/STM32CubeF0 · GitHub