ADC conversion not work after wakeup from STOP2 mode

[npatil15]

Hello,

My agenda is to work with ADC1 with STOP2 mode.

Using LPTIMER1 to wakeup system, from STOP2 mode and once wakeup then reinit adc, calibrate and start adc interrupt. but still I can see adc interrupt not called.

void handleConversion()
{
  ReInit_ADC1();
  HAL_ADCEx_Calibration_Start(&hadc_);
  HAL_StatusTypeDef status = HAL_ADC_Start_IT(&hadc1);
  if (status != HAL_OK) {
    HAL_GPIO_TogglePin(GPIOA, GPIO_PIN_5);
  }

  // LED toggle if we put out of IF statement, so interrupt is register successfully. 
}

 void HAL_ADC_ConvCpltCallback(ADC_HandleTypeDef *hadc)
  {
        __IO uint16_t adcRawValue = HAL_ADC_GetValue(hadc);
        uint16_t adcVoltage_mVolt = __LL_ADC_CALC_DATA_TO_VOLTAGE(VDDA_APPLI, adcRawValue, LL_ADC_RESOLUTION_12B);
        InternalBatteryDriver::setVoltageCallback(adcVoltage_mVolt);
//        HAL_GPIO_TogglePin(GPIOA, GPIO_PIN_5);
        scheduler_push_event(EVENT_ADC_CONVERSION_COMPLETE);
  }
//Here as final result, trying to glow LED which is not blinking

and here is the ADC_Init code for reference

static void MX_ADC1_Init(void)
{
  ADC_ChannelConfTypeDef sConfig = {0};
  hadc1.Instance = ADC1;
  hadc1.Init.ClockPrescaler = ADC_CLOCK_ASYNC_DIV4;
  hadc1.Init.Resolution = ADC_RESOLUTION_12B;
  hadc1.Init.DataAlign = ADC_DATAALIGN_RIGHT;
  hadc1.Init.ScanConvMode = ADC_SCAN_DISABLE;
  hadc1.Init.EOCSelection = ADC_EOC_SINGLE_CONV;
  hadc1.Init.LowPowerAutoWait = ENABLE;
  hadc1.Init.LowPowerAutoPowerOff = ENABLE;
  hadc1.Init.ContinuousConvMode = DISABLE;
  hadc1.Init.NbrOfConversion = 1;
  hadc1.Init.DiscontinuousConvMode = DISABLE;
  hadc1.Init.ExternalTrigConv = ADC_SOFTWARE_START;
  hadc1.Init.ExternalTrigConvEdge = ADC_EXTERNALTRIGCONVEDGE_NONE;
  hadc1.Init.DMAContinuousRequests = DISABLE;
  hadc1.Init.Overrun = ADC_OVR_DATA_OVERWRITTEN;
  hadc1.Init.SamplingTimeCommon1 = ADC_SAMPLETIME_79CYCLES_5;
  hadc1.Init.SamplingTimeCommon2 = ADC_SAMPLETIME_79CYCLES_5;
  hadc1.Init.OversamplingMode = DISABLE;
  hadc1.Init.TriggerFrequencyMode = ADC_TRIGGER_FREQ_HIGH;
  if (HAL_ADC_Init(&hadc1) != HAL_OK)
  {
    Error_Handler();
  }

  sConfig.Channel = ADC_CHANNEL_4;
  sConfig.Rank = ADC_REGULAR_RANK_1;
  sConfig.SamplingTime = ADC_SAMPLINGTIME_COMMON_1;
  if (HAL_ADC_ConfigChannel(&hadc1, &sConfig) != HAL_OK)
  {
    Error_Handler();
  }
}

Help me if I'm missing anything here.

FYI, this works when we try to disable stop2 mode.

Here is the wakeup details,

void enterLowPowerMode()
{
  HAL_UARTEx_EnableStopMode(&hlpuart1);
  HAL_SuspendTick();
  HAL_PWREx_EnterSTOP2Mode(PWR_STOPENTRY_WFI);
  HAL_ResumeTick();
  Reset_SystemClock();
}

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

  HAL_PWREx_ControlVoltageScaling(PWR_REGULATOR_VOLTAGE_SCALE2);

  RCC_OscInitStruct.OscillatorType = RCC_OSCILLATORTYPE_HSI|RCC_OSCILLATORTYPE_LSI;
  RCC_OscInitStruct.HSIState = RCC_HSI_ON;
  RCC_OscInitStruct.HSICalibrationValue = RCC_HSICALIBRATION_DEFAULT;
  RCC_OscInitStruct.LSIState = RCC_LSI_ON;
  RCC_OscInitStruct.PLL.PLLState = RCC_PLL_NONE;
  if (HAL_RCC_OscConfig(&RCC_OscInitStruct) != HAL_OK)
  {
    Error_Handler();
  }

  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_1) != HAL_OK)
  {
    Error_Handler();
  }
}

Thanks,

Nitin

[Andrew Neil]

Was the ADC working before going to sleep? 

EDIT: Sorry - I missed where you said it did work.

---

@npatil15 wrote:

Here is the wakeup details,

void enterLowPowerMode()
{
  HAL_UARTEx_EnableStopMode(&hlpuart1);
  HAL_SuspendTick();
  HAL_PWREx_EnterSTOP2Mode(PWR_STOPENTRY_WFI);
  HAL_ResumeTick();
  Reset_SystemClock();
}

---

You haven't shown the code of Reset_SystemClock()

[npatil15]

actually Reset_SystemClock() is just the wrapper for SystemClock_Config() function.

void Reset_SystemClock(void)
{
  SystemClock_Config()
}

And ReInit_ADC1() is also a wrapper function for MX_ADC1_Init()

void ReInit_ADC1(void)
{
  MX_ADC1_Init();
}

Thanks,

Nitin

[Andrew Neil]

Seems like unnecessary obfuscation - why not just call the functions direct?

[npatil15]

This I have done for purpose, as have multiple CPP and C file. 

[npatil15 · Accepted solution]

Hello,

It is working now; I have missed the ADC interrupt handler to set.

Thanks,

Nitin