STM32H7 ADC3 setup fails

[Daan1]

Hi,

I am trying to set-up the ADC3 for STM32H7 but the HAL_ADC_Init() fails ?

After debugging, I see that the function LL_ADC_IsInternalRegulatorEnabled() fails in HAL_ADC_Init(). I also see that DEEPPWD is 0 on reset but the datasheet say that it should be 1 on reset. Why is this so ?

regards,
Daan

[SofLit]

Hello,

You need always to provide the MCU part number in your post + share your code.

Please review tips on posting.

Thank you.

[Daan1]

Hi,
MCU is STM32H743.

The code is CubeMx generated.

Clock Config is as given below:

static void MX_ADC3_Init(void)

{

  /* USER CODE BEGIN ADC3_Init 0 */

  /* USER CODE END ADC3_Init 0 */

  ADC_ChannelConfTypeDef sConfig = {0};

  /* USER CODE BEGIN ADC3_Init 1 */

  /* USER CODE END ADC3_Init 1 */

  /** Common config

  */

  hadc3.Instance = ADC3;

  hadc3.Init.ClockPrescaler = ADC_CLOCK_ASYNC_DIV1;

  hadc3.Init.ScanConvMode = ADC_SCAN_DISABLE;

  hadc3.Init.EOCSelection = ADC_EOC_SINGLE_CONV;

  hadc3.Init.LowPowerAutoWait = DISABLE;

  hadc3.Init.ContinuousConvMode = DISABLE;

  hadc3.Init.NbrOfConversion = 1;

  hadc3.Init.DiscontinuousConvMode = DISABLE;

  hadc3.Init.ExternalTrigConv = ADC_SOFTWARE_START;

  hadc3.Init.ExternalTrigConvEdge = ADC_EXTERNALTRIGCONVEDGE_NONE;

  hadc3.Init.ConversionDataManagement = ADC_CONVERSIONDATA_DR;

  hadc3.Init.Overrun = ADC_OVR_DATA_PRESERVED;

  hadc3.Init.LeftBitShift = ADC_LEFTBITSHIFT_NONE;

  hadc3.Init.OversamplingMode = DISABLE;

  hadc3.Init.Oversampling.Ratio = 1;

  hadc3.Init.Resolution = ADC_RESOLUTION_16B;

  if (HAL_ADC_Init(&hadc3) != HAL_OK)

  {


  }

static void SystemClock_Config(void)

{

  RCC_OscInitTypeDef RCC_OscInitStruct = {0};

  RCC_ClkInitTypeDef RCC_ClkInitStruct = {0};

  /** Supply configuration update enable

  */

  (void)HAL_PWREx_ConfigSupply(PWR_LDO_SUPPLY);

  /** Configure the main internal regulator output voltage

  */

  __HAL_PWR_VOLTAGESCALING_CONFIG(PWR_REGULATOR_VOLTAGE_SCALE1);

  while(!__HAL_PWR_GET_FLAG(PWR_FLAG_VOSRDY)) {}

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

  * in the RCC_OscInitTypeDef structure.

  */

  /* NOTE: The Oscillator Type value was previously modified by the different dev,  */

  /*       not sure about any particular reason assocuated with it,                 */

  /*       tried to do the same configuration into the CubeMX, but no luck.         */

  /*       Need to make sure to put this change manually once code is re-generated! */

  RCC_OscInitStruct.OscillatorType = RCC_OSCILLATORTYPE_HSE;

  RCC_OscInitStruct.HSEState = RCC_HSE_BYPASS;

  RCC_OscInitStruct.LSIState = RCC_LSE_BYPASS;

  RCC_OscInitStruct.PLL.PLLState = RCC_PLL_ON;

  RCC_OscInitStruct.PLL.PLLSource = RCC_PLLSOURCE_HSE;

  RCC_OscInitStruct.PLL.PLLM = 1;

  RCC_OscInitStruct.PLL.PLLN = 100;

  RCC_OscInitStruct.PLL.PLLP = 2;

  RCC_OscInitStruct.PLL.PLLQ = 100;

  RCC_OscInitStruct.PLL.PLLR = 2;

  RCC_OscInitStruct.PLL.PLLRGE = RCC_PLL1VCIRANGE_3;

  RCC_OscInitStruct.PLL.PLLVCOSEL = RCC_PLL1VCOWIDE;

  RCC_OscInitStruct.PLL.PLLFRACN = 0;

  if (HAL_RCC_OscConfig(&RCC_OscInitStruct) != HAL_OK)

  {


  }

  /** 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_2) != HAL_OK)

  {


  }

}

[SofLit]

Could you please share your ioc file?

[Daan1]

Hi @SofLit ,

ioc file attached. 

[SofLit · Accepted solution]

Hello,

I didn't reproduce the behavior on NUCLEO-H743 board. 

HAL_ADC_Init(&hadc3) call passed without any error.

Need to check you HW.

[Daan1]

Thanks for your prompt response.

[SofLit]

Hello, 

---

@Daan1 wrote:

Thanks for your prompt response.

---

Sorry, I didn't understand, did I answer your question?