/**
* @brief ADC1 Initialization Function
* @retval None
*/
static void MX_ADC1_Init(void)
{
/* USER CODE BEGIN ADC1_Init 0 */
/* USER CODE END ADC1_Init 0 */
ADC_ChannelConfTypeDef sConfig = {0};
/* USER CODE BEGIN ADC1_Init 1 */
/* USER CODE END ADC1_Init 1 */
/** Configure the global features of the ADC (Clock, Resolution, Data Alignment and number of conversion)
*/
hadc1.Instance = ADC1;
hadc1.Init.ClockPrescaler = ADC_CLOCK_SYNC_PCLK_DIV1;
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 = DISABLE;
hadc1.Init.LowPowerAutoPowerOff = DISABLE;
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_PRESERVED;
hadc1.Init.SamplingTimeCommon1 = ADC_SAMPLETIME_160CYCLES_5;
hadc1.Init.SamplingTimeCommon2 = ADC_SAMPLETIME_1CYCLE_5;
hadc1.Init.OversamplingMode = DISABLE;
hadc1.Init.TriggerFrequencyMode = ADC_TRIGGER_FREQ_HIGH;
if (HAL_ADC_Init(&hadc1) != HAL_OK)
{
Error_Handler();
}
/** Configure Regular Channel
*/
sConfig.Channel = ADC_CHANNEL_VREFINT;
sConfig.Rank = ADC_REGULAR_RANK_1;
sConfig.SamplingTime = ADC_SAMPLINGTIME_COMMON_1;
if (HAL_ADC_ConfigChannel(&hadc1, &sConfig) != HAL_OK)
{
Error_Handler();
}
/* USER CODE BEGIN ADC1_Init 2 */
/* USER CODE END ADC1_Init 2 */
}
Note: I'm keeping the MCU in Stop2 Mode. So, I'm de-initializing the ADC every time I go to Stop2 mode.
void measure_voltage(){
// Initialize ADC1
HAL_ADC_Init(&hadc1);
// Always calibrate ADC first
// HAL_ADCEx_Calibration_Start(&hadc1);
// Start the conversion sequence
HAL_ADC_Start(&hadc1);
/*
* Rank 1: vref internal
*/
HAL_ADC_PollForConversion(&hadc1, HAL_MAX_DELAY);
uint32_t vrefint_data = HAL_ADC_GetValue(&hadc1);
/*
* This macro calculates the vdda voltage (as a uint32_t representing the voltage in milliVolts)
* using the vref internal raw adc value, and the internal calibration value in ROM
*/
uint32_t vdda_voltage = __HAL_ADC_CALC_VREFANALOG_VOLTAGE(vrefint_data, ADC_RESOLUTION_12B);
bat_vol = vdda_voltage;
// Stop the conversion sequence
HAL_ADC_Stop(&hadc1);
// De-initialize ADC1
HAL_ADC_DeInit(&hadc1);
return;
}
Can anyone please tell me where I'm doing it wrong?
